+++ /dev/null
-/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
- *
- * Copyright (c) 2004-2013 Apple Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-#include <stdint.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <pthread.h>
-#include <libproc.h>
-#include <sys/param.h>
-#include <mach/mach_time.h> // mach_absolute_time()
-#include <mach/mach_init.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/syscall.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/syslog.h>
-#include <sys/uio.h>
-#include <mach/mach.h>
-#include <mach-o/fat.h>
-#include <mach-o/loader.h>
-#include <mach-o/ldsyms.h>
-#include <libkern/OSByteOrder.h>
-#include <libkern/OSAtomic.h>
-#include <mach/mach.h>
-#include <sys/sysctl.h>
-#include <sys/mman.h>
-#include <sys/dtrace.h>
-#include <libkern/OSAtomic.h>
-#include <Availability.h>
-#include <System/sys/codesign.h>
-#include <System/sys/csr.h>
-#include <_simple.h>
-#include <os/lock_private.h>
-#include <System/machine/cpu_capabilities.h>
-#include <System/sys/reason.h>
-#include <kern/kcdata.h>
-#if TARGET_IPHONE_SIMULATOR
- enum {
- AMFI_DYLD_INPUT_PROC_IN_SIMULATOR = (1 << 0),
- };
- enum amfi_dyld_policy_output_flag_set {
- AMFI_DYLD_OUTPUT_ALLOW_AT_PATH = (1 << 0),
- AMFI_DYLD_OUTPUT_ALLOW_PATH_VARS = (1 << 1),
- AMFI_DYLD_OUTPUT_ALLOW_CUSTOM_SHARED_CACHE = (1 << 2),
- AMFI_DYLD_OUTPUT_ALLOW_FALLBACK_PATHS = (1 << 3),
- AMFI_DYLD_OUTPUT_ALLOW_PRINT_VARS = (1 << 4),
- AMFI_DYLD_OUTPUT_ALLOW_FAILED_LIBRARY_INSERTION = (1 << 5),
- };
- extern "C" int amfi_check_dyld_policy_self(uint64_t input_flags, uint64_t* output_flags);
-#else
- #include <libamfi.h>
-#endif
-extern "C" {
- #include <corecrypto/ccdigest.h>
- #include <corecrypto/ccsha2.h>
-}
-#include <sandbox.h>
-#include <sandbox/private.h>
-#if __has_feature(ptrauth_calls)
- #include <ptrauth.h>
-#endif
-
-extern "C" int __fork();
-
-#include <array>
-#include <algorithm>
-#include <vector>
-
-#ifndef CPU_SUBTYPE_ARM_V5TEJ
- #define CPU_SUBTYPE_ARM_V5TEJ ((cpu_subtype_t) 7)
-#endif
-#ifndef CPU_SUBTYPE_ARM_XSCALE
- #define CPU_SUBTYPE_ARM_XSCALE ((cpu_subtype_t) 8)
-#endif
-#ifndef CPU_SUBTYPE_ARM_V7
- #define CPU_SUBTYPE_ARM_V7 ((cpu_subtype_t) 9)
-#endif
-#ifndef CPU_SUBTYPE_ARM_V7F
- #define CPU_SUBTYPE_ARM_V7F ((cpu_subtype_t) 10)
-#endif
-#ifndef CPU_SUBTYPE_ARM_V7S
- #define CPU_SUBTYPE_ARM_V7S ((cpu_subtype_t) 11)
-#endif
-#ifndef CPU_SUBTYPE_ARM_V7K
- #define CPU_SUBTYPE_ARM_V7K ((cpu_subtype_t) 12)
-#endif
-#ifndef LC_DYLD_ENVIRONMENT
- #define LC_DYLD_ENVIRONMENT 0x27
-#endif
-
-#ifndef CPU_SUBTYPE_X86_64_H
- #define CPU_SUBTYPE_X86_64_H ((cpu_subtype_t) 8)
-#endif
-
-#ifndef CPU_SUBTYPE_ARM64_E
- #define CPU_SUBTYPE_ARM64_E 2
-#endif
-
-#ifndef CPU_ARCH_ABI64_32
- #define CPU_ARCH_ABI64_32 ((cpu_type_t) 0x02000000)
-#endif
-#ifndef CPU_TYPE_ARM64_32
- #define CPU_TYPE_ARM64_32 ((cpu_type_t) (CPU_TYPE_ARM | CPU_ARCH_ABI64_32))
-#endif
-#ifndef CPU_SUBTYPE_ARM64_32_V8
- #define CPU_SUBTYPE_ARM64_32_V8 ((cpu_subtype_t) 1)
-#endif
-
-#ifndef VM_PROT_SLIDE
- #define VM_PROT_SLIDE 0x20
-#endif
-
-#include "mach-o/dyld_gdb.h"
-
-#include "dyld.h"
-#include "ImageLoader.h"
-#include "ImageLoaderMachO.h"
-#include "dyldLibSystemInterface.h"
-#include "dyld_cache_format.h"
-#include "dyld_process_info_internal.h"
-
-#if SUPPORT_ACCELERATE_TABLES
- #include "ImageLoaderMegaDylib.h"
-#endif
-
-#if TARGET_IPHONE_SIMULATOR
- extern "C" void* gSyscallHelpers;
-#else
- #include "dyldSyscallInterface.h"
-#endif
-
-#include "Closure.h"
-#include "libdyldEntryVector.h"
-#include "MachOLoaded.h"
-#include "Loading.h"
-#include "DyldSharedCache.h"
-#include "SharedCacheRuntime.h"
-#include "StringUtils.h"
-#include "Tracing.h"
-#include "ClosureBuilder.h"
-#include "ClosureFileSystemPhysical.h"
-#include "FileUtils.h"
-
-
-// not libc header for send() syscall interface
-extern "C" ssize_t __sendto(int, const void *, size_t, int, const struct sockaddr *, socklen_t);
-
-
-// ARM and x86_64 are the only architecture that use cpu-sub-types
-#define CPU_SUBTYPES_SUPPORTED ((__arm__ || __arm64__ || __x86_64__) && !TARGET_IPHONE_SIMULATOR)
-
-#if __LP64__
- #define LC_SEGMENT_COMMAND LC_SEGMENT_64
- #define LC_SEGMENT_COMMAND_WRONG LC_SEGMENT
- #define LC_ENCRYPT_COMMAND LC_ENCRYPTION_INFO
- #define macho_segment_command segment_command_64
- #define macho_section section_64
-#else
- #define LC_SEGMENT_COMMAND LC_SEGMENT
- #define LC_SEGMENT_COMMAND_WRONG LC_SEGMENT_64
- #define LC_ENCRYPT_COMMAND LC_ENCRYPTION_INFO_64
- #define macho_segment_command segment_command
- #define macho_section section
-#endif
-
-
-
-#define CPU_TYPE_MASK 0x00FFFFFF /* complement of CPU_ARCH_MASK */
-
-
-/* implemented in dyld_gdb.cpp */
-extern void resetAllImages();
-extern void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
-extern void removeImageFromAllImages(const mach_header* mh);
-extern void addNonSharedCacheImageUUID(const dyld_uuid_info& info);
-extern const char* notifyGDB(enum dyld_image_states state, uint32_t infoCount, const dyld_image_info info[]);
-extern size_t allImagesCount();
-
-// magic so CrashReporter logs message
-extern "C" {
- char error_string[1024];
-}
-
-// magic linker symbol for start of dyld binary
-extern "C" const macho_header __dso_handle;
-
-
-//
-// The file contains the core of dyld used to get a process to main().
-// The API's that dyld supports are implemented in dyldAPIs.cpp.
-//
-//
-//
-//
-//
-namespace dyld {
- struct RegisteredDOF { const mach_header* mh; int registrationID; };
- struct DylibOverride { const char* installName; const char* override; };
-}
-
-
-VECTOR_NEVER_DESTRUCTED(ImageLoader*);
-VECTOR_NEVER_DESTRUCTED(dyld::RegisteredDOF);
-VECTOR_NEVER_DESTRUCTED(dyld::ImageCallback);
-VECTOR_NEVER_DESTRUCTED(dyld::DylibOverride);
-VECTOR_NEVER_DESTRUCTED(ImageLoader::DynamicReference);
-
-VECTOR_NEVER_DESTRUCTED(dyld_image_state_change_handler);
-
-namespace dyld {
-
-
-//
-// state of all environment variables dyld uses
-//
-struct EnvironmentVariables {
- const char* const * DYLD_FRAMEWORK_PATH;
- const char* const * DYLD_FALLBACK_FRAMEWORK_PATH;
- const char* const * DYLD_LIBRARY_PATH;
- const char* const * DYLD_FALLBACK_LIBRARY_PATH;
- const char* const * DYLD_INSERT_LIBRARIES;
- const char* const * LD_LIBRARY_PATH; // for unix conformance
- const char* const * DYLD_VERSIONED_LIBRARY_PATH;
- const char* const * DYLD_VERSIONED_FRAMEWORK_PATH;
- bool DYLD_PRINT_LIBRARIES_POST_LAUNCH;
- bool DYLD_BIND_AT_LAUNCH;
- bool DYLD_PRINT_STATISTICS;
- bool DYLD_PRINT_STATISTICS_DETAILS;
- bool DYLD_PRINT_OPTS;
- bool DYLD_PRINT_ENV;
- bool DYLD_DISABLE_DOFS;
- // DYLD_SHARED_CACHE_DIR ==> sSharedCacheOverrideDir
- // DYLD_ROOT_PATH ==> gLinkContext.rootPaths
- // DYLD_IMAGE_SUFFIX ==> gLinkContext.imageSuffix
- // DYLD_PRINT_OPTS ==> gLinkContext.verboseOpts
- // DYLD_PRINT_ENV ==> gLinkContext.verboseEnv
- // DYLD_FORCE_FLAT_NAMESPACE ==> gLinkContext.bindFlat
- // DYLD_PRINT_INITIALIZERS ==> gLinkContext.verboseInit
- // DYLD_PRINT_SEGMENTS ==> gLinkContext.verboseMapping
- // DYLD_PRINT_BINDINGS ==> gLinkContext.verboseBind
- // DYLD_PRINT_WEAK_BINDINGS ==> gLinkContext.verboseWeakBind
- // DYLD_PRINT_REBASINGS ==> gLinkContext.verboseRebase
- // DYLD_PRINT_DOFS ==> gLinkContext.verboseDOF
- // DYLD_PRINT_APIS ==> gLogAPIs
- // DYLD_IGNORE_PREBINDING ==> gLinkContext.prebindUsage
- // DYLD_PREBIND_DEBUG ==> gLinkContext.verbosePrebinding
- // DYLD_NEW_LOCAL_SHARED_REGIONS ==> gLinkContext.sharedRegionMode
- // DYLD_SHARED_REGION ==> gLinkContext.sharedRegionMode
- // DYLD_PRINT_WARNINGS ==> gLinkContext.verboseWarnings
- // DYLD_PRINT_RPATHS ==> gLinkContext.verboseRPaths
- // DYLD_PRINT_INTERPOSING ==> gLinkContext.verboseInterposing
- // DYLD_PRINT_LIBRARIES ==> gLinkContext.verboseLoading
-};
-
-
-
-typedef std::vector<dyld_image_state_change_handler> StateHandlers;
-
-
-enum EnvVarMode { envNone, envPrintOnly, envAll };
-
-// all global state
-static const char* sExecPath = NULL;
-static const char* sExecShortName = NULL;
-static const macho_header* sMainExecutableMachHeader = NULL;
-static uintptr_t sMainExecutableSlide = 0;
-#if CPU_SUBTYPES_SUPPORTED
-static cpu_type_t sHostCPU;
-static cpu_subtype_t sHostCPUsubtype;
-#endif
-static ImageLoaderMachO* sMainExecutable = NULL;
-static size_t sInsertedDylibCount = 0;
-static std::vector<ImageLoader*> sAllImages;
-static std::vector<ImageLoader*> sImageRoots;
-static std::vector<ImageLoader*> sImageFilesNeedingTermination;
-static std::vector<RegisteredDOF> sImageFilesNeedingDOFUnregistration;
-static std::vector<ImageCallback> sAddImageCallbacks;
-static std::vector<ImageCallback> sRemoveImageCallbacks;
-static std::vector<LoadImageCallback> sAddLoadImageCallbacks;
-static bool sRemoveImageCallbacksInUse = false;
-static void* sSingleHandlers[7][3];
-static void* sBatchHandlers[7][3];
-static ImageLoader* sLastImageByAddressCache;
-static EnvironmentVariables sEnv;
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-static const char* sFrameworkFallbackPaths[] = { "$HOME/Library/Frameworks", "/Library/Frameworks", "/Network/Library/Frameworks", "/System/Library/Frameworks", NULL };
-static const char* sLibraryFallbackPaths[] = { "$HOME/lib", "/usr/local/lib", "/usr/lib", NULL };
-static const char* sRestrictedFrameworkFallbackPaths[] = { "/System/Library/Frameworks", NULL };
-static const char* sRestrictedLibraryFallbackPaths[] = { "/usr/lib", NULL };
-#else
-static const char* sFrameworkFallbackPaths[] = { "/System/Library/Frameworks", NULL };
-static const char* sLibraryFallbackPaths[] = { "/usr/local/lib", "/usr/lib", NULL };
-#endif
-static UndefinedHandler sUndefinedHandler = NULL;
-static ImageLoader* sBundleBeingLoaded = NULL; // hack until OFI is reworked
-static dyld3::SharedCacheLoadInfo sSharedCacheLoadInfo;
-static const char* sSharedCacheOverrideDir;
- bool gSharedCacheOverridden = false;
-ImageLoader::LinkContext gLinkContext;
-bool gLogAPIs = false;
-#if SUPPORT_ACCELERATE_TABLES
-bool gLogAppAPIs = false;
-#endif
-const struct LibSystemHelpers* gLibSystemHelpers = NULL;
-#if SUPPORT_OLD_CRT_INITIALIZATION
-bool gRunInitializersOldWay = false;
-#endif
-static std::vector<DylibOverride> sDylibOverrides;
-#if !TARGET_IPHONE_SIMULATOR
-static int sLogSocket = -1;
-#endif
-static bool sFrameworksFoundAsDylibs = false;
-#if __x86_64__ && !TARGET_IPHONE_SIMULATOR
-static bool sHaswell = false;
-#endif
-static std::vector<ImageLoader::DynamicReference> sDynamicReferences;
-static OSSpinLock sDynamicReferencesLock = 0;
-#if !TARGET_IPHONE_SIMULATOR
-static bool sLogToFile = false;
-#endif
-static char sLoadingCrashMessage[1024] = "dyld: launch, loading dependent libraries";
-static _dyld_objc_notify_mapped sNotifyObjCMapped;
-static _dyld_objc_notify_init sNotifyObjCInit;
-static _dyld_objc_notify_unmapped sNotifyObjCUnmapped;
-
-#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
-static bool sForceStderr = false;
-#endif
-
-
-#if SUPPORT_ACCELERATE_TABLES
-static ImageLoaderMegaDylib* sAllCacheImagesProxy = NULL;
-static bool sDisableAcceleratorTables = false;
-#endif
-
-bool gUseDyld3 = false;
-static bool sSkipMain = false;
-static bool sEnableClosures = false;
-static uint64_t launchTraceID = 0;
-
-//
-// The MappedRanges structure is used for fast address->image lookups.
-// The table is only updated when the dyld lock is held, so we don't
-// need to worry about multiple writers. But readers may look at this
-// data without holding the lock. Therefore, all updates must be done
-// in an order that will never cause readers to see inconsistent data.
-// The general rule is that if the image field is non-NULL then
-// the other fields are valid.
-//
-struct MappedRanges
-{
- MappedRanges* next;
- unsigned long count;
- struct {
- ImageLoader* image;
- uintptr_t start;
- uintptr_t end;
- } array[1];
-};
-
-static MappedRanges* sMappedRangesStart;
-
-void addMappedRange(ImageLoader* image, uintptr_t start, uintptr_t end)
-{
- //dyld::log("addMappedRange(0x%lX->0x%lX) for %s\n", start, end, image->getShortName());
- for (MappedRanges* p = sMappedRangesStart; p != NULL; p = p->next) {
- for (unsigned long i=0; i < p->count; ++i) {
- if ( p->array[i].image == NULL ) {
- p->array[i].start = start;
- p->array[i].end = end;
- // add image field last with a barrier so that any reader will see consistent records
- OSMemoryBarrier();
- p->array[i].image = image;
- return;
- }
- }
- }
- // table must be full, chain another
-#if SUPPORT_ACCELERATE_TABLES
- unsigned count = (sAllCacheImagesProxy != NULL) ? 16 : 400;
-#else
- unsigned count = 400;
-#endif
- size_t allocationSize = sizeof(MappedRanges) + (count-1)*3*sizeof(void*);
- MappedRanges* newRanges = (MappedRanges*)malloc(allocationSize);
- bzero(newRanges, allocationSize);
- newRanges->count = count;
- newRanges->array[0].start = start;
- newRanges->array[0].end = end;
- newRanges->array[0].image = image;
- OSMemoryBarrier();
- if ( sMappedRangesStart == NULL ) {
- sMappedRangesStart = newRanges;
- }
- else {
- for (MappedRanges* p = sMappedRangesStart; p != NULL; p = p->next) {
- if ( p->next == NULL ) {
- OSMemoryBarrier();
- p->next = newRanges;
- break;
- }
- }
- }
-}
-
-void removedMappedRanges(ImageLoader* image)
-{
- for (MappedRanges* p = sMappedRangesStart; p != NULL; p = p->next) {
- for (unsigned long i=0; i < p->count; ++i) {
- if ( p->array[i].image == image ) {
- // clear with a barrier so that any reader will see consistent records
- OSMemoryBarrier();
- p->array[i].image = NULL;
- }
- }
- }
-}
-
-ImageLoader* findMappedRange(uintptr_t target)
-{
- for (MappedRanges* p = sMappedRangesStart; p != NULL; p = p->next) {
- for (unsigned long i=0; i < p->count; ++i) {
- if ( p->array[i].image != NULL ) {
- if ( (p->array[i].start <= target) && (target < p->array[i].end) )
- return p->array[i].image;
- }
- }
- }
- return NULL;
-}
-
-
-
-const char* mkstringf(const char* format, ...)
-{
- _SIMPLE_STRING buf = _simple_salloc();
- if ( buf != NULL ) {
- va_list list;
- va_start(list, format);
- _simple_vsprintf(buf, format, list);
- va_end(list);
- const char* t = strdup(_simple_string(buf));
- _simple_sfree(buf);
- if ( t != NULL )
- return t;
- }
- return "mkstringf, out of memory error";
-}
-
-
-void throwf(const char* format, ...)
-{
- _SIMPLE_STRING buf = _simple_salloc();
- if ( buf != NULL ) {
- va_list list;
- va_start(list, format);
- _simple_vsprintf(buf, format, list);
- va_end(list);
- const char* t = strdup(_simple_string(buf));
- _simple_sfree(buf);
- if ( t != NULL )
- throw t;
- }
- throw "throwf, out of memory error";
-}
-
-
-#if !TARGET_IPHONE_SIMULATOR
-static int sLogfile = STDERR_FILENO;
-#endif
-
-#if !TARGET_IPHONE_SIMULATOR
-// based on CFUtilities.c: also_do_stderr()
-static bool useSyslog()
-{
- // Use syslog() for processes managed by launchd
- static bool launchdChecked = false;
- static bool launchdOwned = false;
- if ( !launchdChecked && gProcessInfo->libSystemInitialized ) {
- if ( (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 11) ) {
- // <rdar://problem/23520449> only call isLaunchdOwned() after libSystem is initialized
- launchdOwned = (*gLibSystemHelpers->isLaunchdOwned)();
- launchdChecked = true;
- }
- }
- if ( launchdChecked && launchdOwned )
- return true;
-
- // If stderr is not available, use syslog()
- struct stat sb;
- int result = fstat(STDERR_FILENO, &sb);
- if ( result < 0 )
- return true; // file descriptor 2 is closed
-
- return false;
-}
-
-
-static void socket_syslogv(int priority, const char* format, va_list list)
-{
- // lazily create socket and connection to syslogd
- if ( sLogSocket == -1 ) {
- sLogSocket = ::socket(AF_UNIX, SOCK_DGRAM, 0);
- if (sLogSocket == -1)
- return; // cannot log
- ::fcntl(sLogSocket, F_SETFD, 1);
-
- struct sockaddr_un addr;
- addr.sun_family = AF_UNIX;
- strncpy(addr.sun_path, _PATH_LOG, sizeof(addr.sun_path));
- if ( ::connect(sLogSocket, (struct sockaddr *)&addr, sizeof(addr)) == -1 ) {
- ::close(sLogSocket);
- sLogSocket = -1;
- return;
- }
- }
-
- // format message to syslogd like: "<priority>Process[pid]: message"
- _SIMPLE_STRING buf = _simple_salloc();
- if ( buf == NULL )
- return;
- if ( _simple_sprintf(buf, "<%d>%s[%d]: ", LOG_USER|LOG_NOTICE, sExecShortName, getpid()) == 0 ) {
- if ( _simple_vsprintf(buf, format, list) == 0 ) {
- const char* p = _simple_string(buf);
- ::__sendto(sLogSocket, p, strlen(p), 0, NULL, 0);
- }
- }
- _simple_sfree(buf);
-}
-
-
-
-void vlog(const char* format, va_list list)
-{
-#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
- // <rdar://problem/25965832> log to console when running iOS app from Xcode
- if ( !sLogToFile && !sForceStderr && useSyslog() )
-#else
- if ( !sLogToFile && useSyslog() )
-#endif
- socket_syslogv(LOG_ERR, format, list);
- else {
- _simple_vdprintf(sLogfile, format, list);
- }
-}
-
-void log(const char* format, ...)
-{
- va_list list;
- va_start(list, format);
- vlog(format, list);
- va_end(list);
-}
-
-
-void vwarn(const char* format, va_list list)
-{
- _simple_dprintf(sLogfile, "dyld: warning, ");
- _simple_vdprintf(sLogfile, format, list);
-}
-
-void warn(const char* format, ...)
-{
- va_list list;
- va_start(list, format);
- vwarn(format, list);
- va_end(list);
-}
-
-#else
- extern void vlog(const char* format, va_list list);
-#endif // !TARGET_IPHONE_SIMULATOR
-
-
-// <rdar://problem/8867781> control access to sAllImages through a lock
-// because global dyld lock is not held during initialization phase of dlopen()
-// <rdar://problem/16145518> Use OSSpinLockLock to allow yielding
-static OSSpinLock sAllImagesLock = 0;
-
-static void allImagesLock()
-{
- OSSpinLockLock(&sAllImagesLock);
-}
-
-static void allImagesUnlock()
-{
- OSSpinLockUnlock(&sAllImagesLock);
-}
-
-
-// utility class to assure files are closed when an exception is thrown
-class FileOpener {
-public:
- FileOpener(const char* path);
- ~FileOpener();
- int getFileDescriptor() { return fd; }
-private:
- int fd;
-};
-
-FileOpener::FileOpener(const char* path)
- : fd(-1)
-{
- fd = my_open(path, O_RDONLY, 0);
-}
-
-FileOpener::~FileOpener()
-{
- if ( fd != -1 )
- close(fd);
-}
-
-
-static void registerDOFs(const std::vector<ImageLoader::DOFInfo>& dofs)
-{
- const size_t dofSectionCount = dofs.size();
- if ( !sEnv.DYLD_DISABLE_DOFS && (dofSectionCount != 0) ) {
- int fd = open("/dev/" DTRACEMNR_HELPER, O_RDWR);
- if ( fd < 0 ) {
- //dyld::warn("can't open /dev/" DTRACEMNR_HELPER " to register dtrace DOF sections\n");
- }
- else {
- // allocate a buffer on the stack for the variable length dof_ioctl_data_t type
- uint8_t buffer[sizeof(dof_ioctl_data_t) + dofSectionCount*sizeof(dof_helper_t)];
- dof_ioctl_data_t* ioctlData = (dof_ioctl_data_t*)buffer;
-
- // fill in buffer with one dof_helper_t per DOF section
- ioctlData->dofiod_count = dofSectionCount;
- for (unsigned int i=0; i < dofSectionCount; ++i) {
- strlcpy(ioctlData->dofiod_helpers[i].dofhp_mod, dofs[i].imageShortName, DTRACE_MODNAMELEN);
- ioctlData->dofiod_helpers[i].dofhp_dof = (uintptr_t)(dofs[i].dof);
- ioctlData->dofiod_helpers[i].dofhp_addr = (uintptr_t)(dofs[i].dof);
- }
-
- // tell kernel about all DOF sections en mas
- // pass pointer to ioctlData because ioctl() only copies a fixed size amount of data into kernel
- user_addr_t val = (user_addr_t)(unsigned long)ioctlData;
- if ( ioctl(fd, DTRACEHIOC_ADDDOF, &val) != -1 ) {
- // kernel returns a unique identifier for each section in the dofiod_helpers[].dofhp_dof field.
- for (unsigned int i=0; i < dofSectionCount; ++i) {
- RegisteredDOF info;
- info.mh = dofs[i].imageHeader;
- info.registrationID = (int)(ioctlData->dofiod_helpers[i].dofhp_dof);
- sImageFilesNeedingDOFUnregistration.push_back(info);
- if ( gLinkContext.verboseDOF ) {
- dyld::log("dyld: registering DOF section %p in %s with dtrace, ID=0x%08X\n",
- dofs[i].dof, dofs[i].imageShortName, info.registrationID);
- }
- }
- }
- else {
- //dyld::log( "dyld: ioctl to register dtrace DOF section failed\n");
- }
- close(fd);
- }
- }
-}
-
-static void unregisterDOF(int registrationID)
-{
- int fd = open("/dev/" DTRACEMNR_HELPER, O_RDWR);
- if ( fd < 0 ) {
- dyld::warn("can't open /dev/" DTRACEMNR_HELPER " to unregister dtrace DOF section\n");
- }
- else {
- ioctl(fd, DTRACEHIOC_REMOVE, registrationID);
- close(fd);
- if ( gLinkContext.verboseInit )
- dyld::warn("unregistering DOF section ID=0x%08X with dtrace\n", registrationID);
- }
-}
-
-
-//
-// _dyld_register_func_for_add_image() is implemented as part of the general image state change notification
-//
-static void notifyAddImageCallbacks(ImageLoader* image)
-{
- // use guard so that we cannot notify about the same image twice
- if ( ! image->addFuncNotified() ) {
- for (std::vector<ImageCallback>::iterator it=sAddImageCallbacks.begin(); it != sAddImageCallbacks.end(); it++) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_FUNC_FOR_ADD_IMAGE, (uint64_t)image->machHeader(), (uint64_t)(*it), 0);
- (*it)(image->machHeader(), image->getSlide());
- }
- for (LoadImageCallback func : sAddLoadImageCallbacks) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_FUNC_FOR_ADD_IMAGE, (uint64_t)image->machHeader(), (uint64_t)(*func), 0);
- (*func)(image->machHeader(), image->getPath(), !image->neverUnload());
- }
- image->setAddFuncNotified();
- }
-}
-
-
-
-// notify gdb about these new images
-static const char* updateAllImages(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info info[])
-{
- // <rdar://problem/8812589> don't add images without paths to all-image-info-list
- if ( info[0].imageFilePath != NULL )
- addImagesToAllImages(infoCount, info);
- return NULL;
-}
-
-
-static StateHandlers* stateToHandlers(dyld_image_states state, void* handlersArray[7][3])
-{
- switch ( state ) {
- case dyld_image_state_mapped:
- return reinterpret_cast<StateHandlers*>(&handlersArray[0]);
-
- case dyld_image_state_dependents_mapped:
- return reinterpret_cast<StateHandlers*>(&handlersArray[1]);
-
- case dyld_image_state_rebased:
- return reinterpret_cast<StateHandlers*>(&handlersArray[2]);
-
- case dyld_image_state_bound:
- return reinterpret_cast<StateHandlers*>(&handlersArray[3]);
-
- case dyld_image_state_dependents_initialized:
- return reinterpret_cast<StateHandlers*>(&handlersArray[4]);
-
- case dyld_image_state_initialized:
- return reinterpret_cast<StateHandlers*>(&handlersArray[5]);
-
- case dyld_image_state_terminated:
- return reinterpret_cast<StateHandlers*>(&handlersArray[6]);
- }
- return NULL;
-}
-
-#if SUPPORT_ACCELERATE_TABLES
-static dyld_image_state_change_handler getPreInitNotifyHandler(unsigned index)
-{
- std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(dyld_image_state_dependents_initialized, sSingleHandlers);
- if ( index >= handlers->size() )
- return NULL;
- return (*handlers)[index];
-}
-
-static dyld_image_state_change_handler getBoundBatchHandler(unsigned index)
-{
- std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(dyld_image_state_bound, sBatchHandlers);
- if ( index >= handlers->size() )
- return NULL;
- return (*handlers)[index];
-}
-
-static void notifySingleFromCache(dyld_image_states state, const mach_header* mh, const char* path)
-{
- //dyld::log("notifySingle(state=%d, image=%s)\n", state, image->getPath());
- std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sSingleHandlers);
- if ( handlers != NULL ) {
- dyld_image_info info;
- info.imageLoadAddress = mh;
- info.imageFilePath = path;
- info.imageFileModDate = 0;
- for (dyld_image_state_change_handler handler : *handlers) {
- const char* result = (*handler)(state, 1, &info);
- if ( (result != NULL) && (state == dyld_image_state_mapped) ) {
- //fprintf(stderr, " image rejected by handler=%p\n", *it);
- // make copy of thrown string so that later catch clauses can free it
- const char* str = strdup(result);
- throw str;
- }
- }
- }
- if ( (state == dyld_image_state_dependents_initialized) && (sNotifyObjCInit != NULL) && (mh->flags & MH_HAS_OBJC) ) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_OBJC_INIT, (uint64_t)mh, 0, 0);
- (*sNotifyObjCInit)(path, mh);
- }
-}
-#endif
-
-#if !TARGET_OS_SIMULATOR
-static void sendMessage(unsigned portSlot, mach_msg_id_t msgId, mach_msg_size_t sendSize, mach_msg_header_t* buffer, mach_msg_size_t bufferSize) {
- // Allocate a port to listen on in this monitoring task
- mach_port_t sendPort = dyld::gProcessInfo->notifyPorts[portSlot];
- if (sendPort == MACH_PORT_NULL) {
- return;
- }
- mach_port_t replyPort = MACH_PORT_NULL;
- mach_port_options_t options = { .flags = MPO_CONTEXT_AS_GUARD | MPO_STRICT,
- .mpl = { 1 }};
- kern_return_t kr = mach_port_construct(mach_task_self(), &options, (mach_port_context_t)&replyPort, &replyPort);
- if (kr != KERN_SUCCESS) {
- return;
- }
- // Assemble a message
- mach_msg_header_t* h = buffer;
- h->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND,MACH_MSG_TYPE_MAKE_SEND_ONCE);
- h->msgh_id = msgId;
- h->msgh_local_port = replyPort;
- h->msgh_remote_port = sendPort;
- h->msgh_reserved = 0;
- h->msgh_size = sendSize;
- kr = mach_msg(h, MACH_SEND_MSG | MACH_RCV_MSG, h->msgh_size, bufferSize, replyPort, 0, MACH_PORT_NULL);
- mach_msg_destroy(h);
- if ( kr == MACH_SEND_INVALID_DEST ) {
- if (OSAtomicCompareAndSwap32(sendPort, 0, (volatile int32_t*)&dyld::gProcessInfo->notifyPorts[portSlot])) {
- mach_port_deallocate(mach_task_self(), sendPort);
- }
- }
- mach_port_destruct(mach_task_self(), replyPort, 0, (mach_port_context_t)&replyPort);
-}
-
-static void notifyMonitoringDyld(bool unloading, unsigned imageCount, const struct mach_header* loadAddresses[],
- const char* imagePaths[])
-{
- dyld3::ScopedTimer(DBG_DYLD_REMOTE_IMAGE_NOTIFIER, 0, 0, 0);
- for (int slot=0; slot < DYLD_MAX_PROCESS_INFO_NOTIFY_COUNT; ++slot) {
- if ( dyld::gProcessInfo->notifyPorts[slot] == 0) continue;
- unsigned entriesSize = imageCount*sizeof(dyld_process_info_image_entry);
- unsigned pathsSize = 0;
- for (unsigned j=0; j < imageCount; ++j) {
- pathsSize += (strlen(imagePaths[j]) + 1);
- }
- unsigned totalSize = (sizeof(dyld_process_info_notify_header) + entriesSize + pathsSize + 127) & -128; // align
- if ( totalSize > DYLD_PROCESS_INFO_NOTIFY_MAX_BUFFER_SIZE ) {
- // Putting all image paths into one message would make buffer too big.
- // Instead split into two messages. Recurse as needed until paths fit in buffer.
- unsigned imageHalfCount = imageCount/2;
- notifyMonitoringDyld(unloading, imageHalfCount, loadAddresses, imagePaths);
- notifyMonitoringDyld(unloading, imageCount - imageHalfCount, &loadAddresses[imageHalfCount], &imagePaths[imageHalfCount]);
- return;
- }
- uint8_t buffer[totalSize + MAX_TRAILER_SIZE];
- dyld_process_info_notify_header* header = (dyld_process_info_notify_header*)buffer;
- header->version = 1;
- header->imageCount = imageCount;
- header->imagesOffset = sizeof(dyld_process_info_notify_header);
- header->stringsOffset = sizeof(dyld_process_info_notify_header) + entriesSize;
- header->timestamp = dyld::gProcessInfo->infoArrayChangeTimestamp;
- dyld_process_info_image_entry* entries = (dyld_process_info_image_entry*)&buffer[header->imagesOffset];
- char* const pathPoolStart = (char*)&buffer[header->stringsOffset];
- char* pathPool = pathPoolStart;
- for (unsigned j=0; j < imageCount; ++j) {
- strcpy(pathPool, imagePaths[j]);
- uint32_t len = (uint32_t)strlen(pathPool);
- bzero(entries->uuid, 16);
- dyld3::MachOFile* mf = (dyld3::MachOFile*)loadAddresses[j];
- mf->getUuid(entries->uuid);
- entries->loadAddress = (uint64_t)loadAddresses[j];
- entries->pathStringOffset = (uint32_t)(pathPool - pathPoolStart);
- entries->pathLength = len;
- pathPool += (len +1);
- ++entries;
- }
- if (unloading) {
- sendMessage(slot, DYLD_PROCESS_INFO_NOTIFY_UNLOAD_ID, totalSize, (mach_msg_header_t*)buffer, totalSize+MAX_TRAILER_SIZE);
- } else {
- sendMessage(slot, DYLD_PROCESS_INFO_NOTIFY_LOAD_ID, totalSize, (mach_msg_header_t*)buffer, totalSize+MAX_TRAILER_SIZE);
- }
- }
-}
-
-static void notifyMonitoringDyldMain()
-{
- dyld3::ScopedTimer(DBG_DYLD_REMOTE_IMAGE_NOTIFIER, 0, 0, 0);
- for (int slot=0; slot < DYLD_MAX_PROCESS_INFO_NOTIFY_COUNT; ++slot) {
- if ( dyld::gProcessInfo->notifyPorts[slot] == 0) continue;
- uint8_t buffer[sizeof(mach_msg_header_t) + MAX_TRAILER_SIZE];
- sendMessage(slot, DYLD_PROCESS_INFO_NOTIFY_MAIN_ID, sizeof(mach_msg_header_t), (mach_msg_header_t*)buffer, sizeof(mach_msg_header_t) + MAX_TRAILER_SIZE);
- }
-}
-#else
-extern void notifyMonitoringDyldMain() VIS_HIDDEN;
-extern void notifyMonitoringDyld(bool unloading, unsigned imageCount, const struct mach_header* loadAddresses[],
- const char* imagePaths[]) VIS_HIDDEN;
-#endif
-
-void notifyKernel(const ImageLoader& image, bool loading) {
- if ( !image.inSharedCache() ) {
- uint32_t baseCode = loading ? DBG_DYLD_UUID_MAP_A : DBG_DYLD_UUID_UNMAP_A;
- uuid_t uuid;
- ino_t inode = image.getInode();
- image.getUUID(uuid);
- dyld3::kdebug_trace_dyld_image(baseCode, (const uuid_t *)&uuid, *(fsobj_id_t*)&inode, {{ image.getDevice(), 0 }}, image.machHeader());
- }
-}
-
-static void notifySingle(dyld_image_states state, const ImageLoader* image, ImageLoader::InitializerTimingList* timingInfo)
-{
- //dyld::log("notifySingle(state=%d, image=%s)\n", state, image->getPath());
- std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sSingleHandlers);
- if ( handlers != NULL ) {
- dyld_image_info info;
- info.imageLoadAddress = image->machHeader();
- info.imageFilePath = image->getRealPath();
- info.imageFileModDate = image->lastModified();
- for (std::vector<dyld_image_state_change_handler>::iterator it = handlers->begin(); it != handlers->end(); ++it) {
- const char* result = (*it)(state, 1, &info);
- if ( (result != NULL) && (state == dyld_image_state_mapped) ) {
- //fprintf(stderr, " image rejected by handler=%p\n", *it);
- // make copy of thrown string so that later catch clauses can free it
- const char* str = strdup(result);
- throw str;
- }
- }
- }
- if ( state == dyld_image_state_mapped ) {
- // <rdar://problem/7008875> Save load addr + UUID for images from outside the shared cache
- if ( !image->inSharedCache() ) {
- dyld_uuid_info info;
- if ( image->getUUID(info.imageUUID) ) {
- info.imageLoadAddress = image->machHeader();
- addNonSharedCacheImageUUID(info);
- }
- }
- }
- if ( (state == dyld_image_state_dependents_initialized) && (sNotifyObjCInit != NULL) && image->notifyObjC() ) {
- uint64_t t0 = mach_absolute_time();
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_OBJC_INIT, (uint64_t)image->machHeader(), 0, 0);
- (*sNotifyObjCInit)(image->getRealPath(), image->machHeader());
- uint64_t t1 = mach_absolute_time();
- uint64_t t2 = mach_absolute_time();
- uint64_t timeInObjC = t1-t0;
- uint64_t emptyTime = (t2-t1)*100;
- if ( (timeInObjC > emptyTime) && (timingInfo != NULL) ) {
- timingInfo->addTime(image->getShortName(), timeInObjC);
- }
- }
- // mach message csdlc about dynamically unloaded images
- if ( image->addFuncNotified() && (state == dyld_image_state_terminated) ) {
- notifyKernel(*image, false);
- const struct mach_header* loadAddress[] = { image->machHeader() };
- const char* loadPath[] = { image->getPath() };
- notifyMonitoringDyld(true, 1, loadAddress, loadPath);
- }
-}
-
-
-//
-// Normally, dyld_all_image_infos is only updated in batches after an entire
-// graph is loaded. But if there is an error loading the initial set of
-// dylibs needed by the main executable, dyld_all_image_infos is not yet set
-// up, leading to usually brief crash logs.
-//
-// This function manually adds the images loaded so far to dyld::gProcessInfo.
-// It should only be called before terminating.
-//
-void syncAllImages()
-{
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); ++it) {
- dyld_image_info info;
- ImageLoader* image = *it;
- info.imageLoadAddress = image->machHeader();
- info.imageFilePath = image->getRealPath();
- info.imageFileModDate = image->lastModified();
- // add to all_image_infos if not already there
- bool found = false;
- int existingCount = dyld::gProcessInfo->infoArrayCount;
- const dyld_image_info* existing = dyld::gProcessInfo->infoArray;
- if ( existing != NULL ) {
- for (int i=0; i < existingCount; ++i) {
- if ( existing[i].imageLoadAddress == info.imageLoadAddress ) {
- //dyld::log("not adding %s\n", info.imageFilePath);
- found = true;
- break;
- }
- }
- }
- if ( ! found ) {
- //dyld::log("adding %s\n", info.imageFilePath);
- addImagesToAllImages(1, &info);
- }
- }
-}
-
-
-static int imageSorter(const void* l, const void* r)
-{
- const ImageLoader* left = *((ImageLoader**)l);
- const ImageLoader* right= *((ImageLoader**)r);
- return left->compare(right);
-}
-
-static void notifyBatchPartial(dyld_image_states state, bool orLater, dyld_image_state_change_handler onlyHandler, bool preflightOnly, bool onlyObjCMappedNotification)
-{
- std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sBatchHandlers);
- if ( (handlers != NULL) || ((state == dyld_image_state_bound) && (sNotifyObjCMapped != NULL)) ) {
- // don't use a vector because it will use malloc/free and we want notifcation to be low cost
- allImagesLock();
- dyld_image_info infos[allImagesCount()+1];
- ImageLoader* images[allImagesCount()+1];
- ImageLoader** end = images;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- dyld_image_states imageState = (*it)->getState();
- if ( (imageState == state) || (orLater && (imageState > state)) )
- *end++ = *it;
- }
- if ( sBundleBeingLoaded != NULL ) {
- dyld_image_states imageState = sBundleBeingLoaded->getState();
- if ( (imageState == state) || (orLater && (imageState > state)) )
- *end++ = sBundleBeingLoaded;
- }
- const char* dontLoadReason = NULL;
- uint32_t imageCount = (uint32_t)(end-images);
- if ( imageCount != 0 ) {
- // sort bottom up
- qsort(images, imageCount, sizeof(ImageLoader*), &imageSorter);
- // build info array
- for (unsigned int i=0; i < imageCount; ++i) {
- dyld_image_info* p = &infos[i];
- ImageLoader* image = images[i];
- //dyld::log(" state=%d, name=%s\n", state, image->getPath());
- p->imageLoadAddress = image->machHeader();
- p->imageFilePath = image->getRealPath();
- p->imageFileModDate = image->lastModified();
- // get these registered with the kernel as early as possible
- if ( state == dyld_image_state_dependents_mapped)
- notifyKernel(*image, true);
- // special case for add_image hook
- if ( state == dyld_image_state_bound )
- notifyAddImageCallbacks(image);
- }
- }
-#if SUPPORT_ACCELERATE_TABLES
- if ( sAllCacheImagesProxy != NULL ) {
- unsigned cacheCount = sAllCacheImagesProxy->appendImagesToNotify(state, orLater, &infos[imageCount]);
- // support _dyld_register_func_for_add_image()
- if ( state == dyld_image_state_bound ) {
- for (ImageCallback callback : sAddImageCallbacks) {
- for (unsigned i=0; i < cacheCount; ++i) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_FUNC_FOR_ADD_IMAGE, (uint64_t)infos[imageCount+i].imageLoadAddress, (uint64_t)(*callback), 0);
- (*callback)(infos[imageCount+i].imageLoadAddress, sSharedCacheLoadInfo.slide);
- }
- }
- for (LoadImageCallback func : sAddLoadImageCallbacks) {
- for (unsigned i=0; i < cacheCount; ++i) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_FUNC_FOR_ADD_IMAGE, (uint64_t)infos[imageCount+i].imageLoadAddress, (uint64_t)(*func), 0);
- (*func)(infos[imageCount+i].imageLoadAddress, infos[imageCount+i].imageFilePath, false);
- }
- }
- }
- imageCount += cacheCount;
- }
-#endif
- if ( imageCount != 0 ) {
- if ( !onlyObjCMappedNotification ) {
- if ( onlyHandler != NULL ) {
- const char* result = NULL;
- if ( result == NULL ) {
- result = (*onlyHandler)(state, imageCount, infos);
- }
- if ( (result != NULL) && (state == dyld_image_state_dependents_mapped) ) {
- //fprintf(stderr, " images rejected by handler=%p\n", onlyHandler);
- // make copy of thrown string so that later catch clauses can free it
- dontLoadReason = strdup(result);
- }
- }
- else {
- // call each handler with whole array
- if ( handlers != NULL ) {
- for (std::vector<dyld_image_state_change_handler>::iterator it = handlers->begin(); it != handlers->end(); ++it) {
- const char* result = (*it)(state, imageCount, infos);
- if ( (result != NULL) && (state == dyld_image_state_dependents_mapped) ) {
- //fprintf(stderr, " images rejected by handler=%p\n", *it);
- // make copy of thrown string so that later catch clauses can free it
- dontLoadReason = strdup(result);
- break;
- }
- }
- }
- }
- }
- // tell objc about new images
- if ( (onlyHandler == NULL) && ((state == dyld_image_state_bound) || (orLater && (dyld_image_state_bound > state))) && (sNotifyObjCMapped != NULL) ) {
- const char* paths[imageCount];
- const mach_header* mhs[imageCount];
- unsigned objcImageCount = 0;
- for (int i=0; i < imageCount; ++i) {
- const ImageLoader* image = findImageByMachHeader(infos[i].imageLoadAddress);
- bool hasObjC = false;
- if ( image != NULL ) {
- hasObjC = image->notifyObjC();
- }
-#if SUPPORT_ACCELERATE_TABLES
- else if ( sAllCacheImagesProxy != NULL ) {
- const mach_header* mh;
- const char* path;
- unsigned index;
- if ( sAllCacheImagesProxy->addressInCache(infos[i].imageLoadAddress, &mh, &path, &index) ) {
- hasObjC = (mh->flags & MH_HAS_OBJC);
- }
- }
-#endif
- if ( hasObjC ) {
- paths[objcImageCount] = infos[i].imageFilePath;
- mhs[objcImageCount] = infos[i].imageLoadAddress;
- ++objcImageCount;
- }
- }
- if ( objcImageCount != 0 ) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_OBJC_MAP, 0, 0, 0);
- uint64_t t0 = mach_absolute_time();
- (*sNotifyObjCMapped)(objcImageCount, paths, mhs);
- uint64_t t1 = mach_absolute_time();
- ImageLoader::fgTotalObjCSetupTime += (t1-t0);
- }
- }
- }
- allImagesUnlock();
- if ( dontLoadReason != NULL )
- throw dontLoadReason;
- if ( !preflightOnly && (state == dyld_image_state_dependents_mapped) ) {
- const struct mach_header* loadAddresses[imageCount];
- const char* loadPaths[imageCount];
- for(uint32_t i = 0; i<imageCount; ++i) {
- loadAddresses[i] = infos[i].imageLoadAddress;
- loadPaths[i] = infos[i].imageFilePath;
- }
- notifyMonitoringDyld(false, imageCount, loadAddresses, loadPaths);
- }
- }
-}
-
-static void notifyBatch(dyld_image_states state, bool preflightOnly)
-{
- notifyBatchPartial(state, false, NULL, preflightOnly, false);
-}
-
-static
-void coresymbolication_load_notifier(void* connection, uint64_t timestamp, const char* path, const struct mach_header* mh)
-{
- const struct mach_header* loadAddress[] = { mh };
- const char* loadPath[] = { path };
- notifyMonitoringDyld(false, 1, loadAddress, loadPath);
-}
-
-static
-void coresymbolication_unload_notifier(void* connection, uint64_t timestamp, const char* path, const struct mach_header* mh)
-{
- const struct mach_header* loadAddress = { mh };
- const char* loadPath = { path };
- notifyMonitoringDyld(true, 1, &loadAddress, &loadPath);
-}
-
-// In order for register_func_for_add_image() callbacks to to be called bottom up,
-// we need to maintain a list of root images. The main executable is usally the
-// first root. Any images dynamically added are also roots (unless already loaded).
-// If DYLD_INSERT_LIBRARIES is used, those libraries are first.
-static void addRootImage(ImageLoader* image)
-{
- //dyld::log("addRootImage(%p, %s)\n", image, image->getPath());
- // add to list of roots
- sImageRoots.push_back(image);
-}
-
-
-static void clearAllDepths()
-{
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++)
- (*it)->clearDepth();
-}
-
-static void printAllDepths()
-{
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++)
- dyld::log("%03d %s\n", (*it)->getDepth(), (*it)->getShortName());
-}
-
-
-static unsigned int imageCount()
-{
- allImagesLock();
- unsigned int result = (unsigned int)sAllImages.size();
- allImagesUnlock();
- return (result);
-}
-
-
-static void setNewProgramVars(const ProgramVars& newVars)
-{
- // make a copy of the pointers to program variables
- gLinkContext.programVars = newVars;
-
- // now set each program global to their initial value
- *gLinkContext.programVars.NXArgcPtr = gLinkContext.argc;
- *gLinkContext.programVars.NXArgvPtr = gLinkContext.argv;
- *gLinkContext.programVars.environPtr = gLinkContext.envp;
- *gLinkContext.programVars.__prognamePtr = gLinkContext.progname;
-}
-
-#if SUPPORT_OLD_CRT_INITIALIZATION
-static void setRunInitialzersOldWay()
-{
- gRunInitializersOldWay = true;
-}
-#endif
-
-static bool sandboxBlocked(const char* path, const char* kind)
-{
-#if TARGET_IPHONE_SIMULATOR
- // sandbox calls not yet supported in simulator runtime
- return false;
-#else
- sandbox_filter_type filter = (sandbox_filter_type)(SANDBOX_FILTER_PATH | SANDBOX_CHECK_NO_REPORT);
- return ( sandbox_check(getpid(), kind, filter, path) > 0 );
-#endif
-}
-
-bool sandboxBlockedMmap(const char* path)
-{
- return sandboxBlocked(path, "file-map-executable");
-}
-
-bool sandboxBlockedOpen(const char* path)
-{
- return sandboxBlocked(path, "file-read-data");
-}
-
-bool sandboxBlockedStat(const char* path)
-{
- return sandboxBlocked(path, "file-read-metadata");
-}
-
-
-static void addDynamicReference(ImageLoader* from, ImageLoader* to) {
- // don't add dynamic reference if target is in the shared cache (since it can't be unloaded)
- if ( to->inSharedCache() )
- return;
-
- // don't add dynamic reference if there already is a static one
- if ( from->dependsOn(to) )
- return;
-
- // don't add if this combination already exists
- OSSpinLockLock(&sDynamicReferencesLock);
- for (std::vector<ImageLoader::DynamicReference>::iterator it=sDynamicReferences.begin(); it != sDynamicReferences.end(); ++it) {
- if ( (it->from == from) && (it->to == to) ) {
- OSSpinLockUnlock(&sDynamicReferencesLock);
- return;
- }
- }
-
- //dyld::log("addDynamicReference(%s, %s\n", from->getShortName(), to->getShortName());
- ImageLoader::DynamicReference t;
- t.from = from;
- t.to = to;
- sDynamicReferences.push_back(t);
- OSSpinLockUnlock(&sDynamicReferencesLock);
-}
-
-static void addImage(ImageLoader* image)
-{
- // add to master list
- allImagesLock();
- sAllImages.push_back(image);
- allImagesUnlock();
-
- // update mapped ranges
- uintptr_t lastSegStart = 0;
- uintptr_t lastSegEnd = 0;
- for(unsigned int i=0, e=image->segmentCount(); i < e; ++i) {
- if ( image->segUnaccessible(i) )
- continue;
- uintptr_t start = image->segActualLoadAddress(i);
- uintptr_t end = image->segActualEndAddress(i);
- if ( start == lastSegEnd ) {
- // two segments are contiguous, just record combined segments
- lastSegEnd = end;
- }
- else {
- // non-contiguous segments, record last (if any)
- if ( lastSegEnd != 0 )
- addMappedRange(image, lastSegStart, lastSegEnd);
- lastSegStart = start;
- lastSegEnd = end;
- }
- }
- if ( lastSegEnd != 0 )
- addMappedRange(image, lastSegStart, lastSegEnd);
-
-
- if ( gLinkContext.verboseLoading || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
- dyld::log("dyld: loaded: %s\n", image->getPath());
- }
-
-}
-
-//
-// Helper for std::remove_if
-//
-class RefUsesImage {
-public:
- RefUsesImage(ImageLoader* image) : _image(image) {}
- bool operator()(const ImageLoader::DynamicReference& ref) const {
- return ( (ref.from == _image) || (ref.to == _image) );
- }
-private:
- ImageLoader* _image;
-};
-
-
-
-void removeImage(ImageLoader* image)
-{
- // if has dtrace DOF section, tell dtrace it is going away, then remove from sImageFilesNeedingDOFUnregistration
- for (std::vector<RegisteredDOF>::iterator it=sImageFilesNeedingDOFUnregistration.begin(); it != sImageFilesNeedingDOFUnregistration.end(); ) {
- if ( it->mh == image->machHeader() ) {
- unregisterDOF(it->registrationID);
- sImageFilesNeedingDOFUnregistration.erase(it);
- // don't increment iterator, the erase caused next element to be copied to where this iterator points
- }
- else {
- ++it;
- }
- }
-
- // tell all registered remove image handlers about this
- // do this before removing image from internal data structures so that the callback can query dyld about the image
- if ( image->getState() >= dyld_image_state_bound ) {
- sRemoveImageCallbacksInUse = true; // This only runs inside dyld's global lock, so ok to use a global for the in-use flag.
- for (std::vector<ImageCallback>::iterator it=sRemoveImageCallbacks.begin(); it != sRemoveImageCallbacks.end(); it++) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_FUNC_FOR_REMOVE_IMAGE, (uint64_t)image->machHeader(), (uint64_t)(*it), 0);
- (*it)(image->machHeader(), image->getSlide());
- }
- sRemoveImageCallbacksInUse = false;
-
- if ( sNotifyObjCUnmapped != NULL && image->notifyObjC() )
- (*sNotifyObjCUnmapped)(image->getRealPath(), image->machHeader());
- }
-
- // notify
- notifySingle(dyld_image_state_terminated, image, NULL);
-
- // remove from mapped images table
- removedMappedRanges(image);
-
- // remove from master list
- allImagesLock();
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- if ( *it == image ) {
- sAllImages.erase(it);
- break;
- }
- }
- allImagesUnlock();
-
- // remove from sDynamicReferences
- OSSpinLockLock(&sDynamicReferencesLock);
- sDynamicReferences.erase(std::remove_if(sDynamicReferences.begin(), sDynamicReferences.end(), RefUsesImage(image)), sDynamicReferences.end());
- OSSpinLockUnlock(&sDynamicReferencesLock);
-
- // flush find-by-address cache (do this after removed from master list, so there is no chance it can come back)
- if ( sLastImageByAddressCache == image )
- sLastImageByAddressCache = NULL;
-
- // if in root list, pull it out
- for (std::vector<ImageLoader*>::iterator it=sImageRoots.begin(); it != sImageRoots.end(); it++) {
- if ( *it == image ) {
- sImageRoots.erase(it);
- break;
- }
- }
-
- // log if requested
- if ( gLinkContext.verboseLoading || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
- dyld::log("dyld: unloaded: %s\n", image->getPath());
- }
-
- // tell gdb, new way
- removeImageFromAllImages(image->machHeader());
-}
-
-
-void runImageStaticTerminators(ImageLoader* image)
-{
- // if in termination list, pull it out and run terminator
- bool mightBeMore;
- do {
- mightBeMore = false;
- for (std::vector<ImageLoader*>::iterator it=sImageFilesNeedingTermination.begin(); it != sImageFilesNeedingTermination.end(); it++) {
- if ( *it == image ) {
- sImageFilesNeedingTermination.erase(it);
- if (gLogAPIs) dyld::log("dlclose(), running static terminators for %p %s\n", image, image->getShortName());
- image->doTermination(gLinkContext);
- mightBeMore = true;
- break;
- }
- }
- } while ( mightBeMore );
-}
-
-static void terminationRecorder(ImageLoader* image)
-{
- sImageFilesNeedingTermination.push_back(image);
-}
-
-const char* getExecutablePath()
-{
- return sExecPath;
-}
-
-static void runAllStaticTerminators(void* extra)
-{
- try {
- const size_t imageCount = sImageFilesNeedingTermination.size();
- for(size_t i=imageCount; i > 0; --i){
- ImageLoader* image = sImageFilesNeedingTermination[i-1];
- image->doTermination(gLinkContext);
- }
- sImageFilesNeedingTermination.clear();
- notifyBatch(dyld_image_state_terminated, false);
- }
- catch (const char* msg) {
- halt(msg);
- }
-}
-
-void initializeMainExecutable()
-{
- // record that we've reached this step
- gLinkContext.startedInitializingMainExecutable = true;
-
- // run initialzers for any inserted dylibs
- ImageLoader::InitializerTimingList initializerTimes[allImagesCount()];
- initializerTimes[0].count = 0;
- const size_t rootCount = sImageRoots.size();
- if ( rootCount > 1 ) {
- for(size_t i=1; i < rootCount; ++i) {
- sImageRoots[i]->runInitializers(gLinkContext, initializerTimes[0]);
- }
- }
-
- // run initializers for main executable and everything it brings up
- sMainExecutable->runInitializers(gLinkContext, initializerTimes[0]);
-
- // register cxa_atexit() handler to run static terminators in all loaded images when this process exits
- if ( gLibSystemHelpers != NULL )
- (*gLibSystemHelpers->cxa_atexit)(&runAllStaticTerminators, NULL, NULL);
-
- // dump info if requested
- if ( sEnv.DYLD_PRINT_STATISTICS )
- ImageLoader::printStatistics((unsigned int)allImagesCount(), initializerTimes[0]);
- if ( sEnv.DYLD_PRINT_STATISTICS_DETAILS )
- ImageLoaderMachO::printStatisticsDetails((unsigned int)allImagesCount(), initializerTimes[0]);
-}
-
-bool mainExecutablePrebound()
-{
- return sMainExecutable->usablePrebinding(gLinkContext);
-}
-
-ImageLoader* mainExecutable()
-{
- return sMainExecutable;
-}
-
-
-
-
-#if SUPPORT_VERSIONED_PATHS
-
-// forward reference
-static bool getDylibVersionAndInstallname(const char* dylibPath, uint32_t* version, char* installName);
-
-
-//
-// Examines a dylib file and if its current_version is newer than the installed
-// dylib at its install_name, then add the dylib file to sDylibOverrides.
-//
-static void checkDylibOverride(const char* dylibFile)
-{
- //dyld::log("checkDylibOverride('%s')\n", dylibFile);
- uint32_t altVersion;
- char sysInstallName[PATH_MAX];
- if ( getDylibVersionAndInstallname(dylibFile, &altVersion, sysInstallName) && (sysInstallName[0] =='/') ) {
- //dyld::log("%s has version 0x%08X and install name %s\n", dylibFile, altVersion, sysInstallName);
- uint32_t sysVersion;
- if ( getDylibVersionAndInstallname(sysInstallName, &sysVersion, NULL) ) {
- //dyld::log("%s has version 0x%08X\n", sysInstallName, sysVersion);
- if ( altVersion > sysVersion ) {
- //dyld::log("override found: %s -> %s\n", sysInstallName, dylibFile);
- // see if there already is an override for this dylib
- bool entryExists = false;
- for (std::vector<DylibOverride>::iterator it = sDylibOverrides.begin(); it != sDylibOverrides.end(); ++it) {
- if ( strcmp(it->installName, sysInstallName) == 0 ) {
- entryExists = true;
- uint32_t prevVersion;
- if ( getDylibVersionAndInstallname(it->override, &prevVersion, NULL) ) {
- if ( altVersion > prevVersion ) {
- // found an even newer override
- free((void*)(it->override));
- char resolvedPath[PATH_MAX];
- if ( realpath(dylibFile, resolvedPath) != NULL )
- it->override = strdup(resolvedPath);
- else
- it->override = strdup(dylibFile);
- break;
- }
- }
- }
- }
- if ( ! entryExists ) {
- DylibOverride entry;
- entry.installName = strdup(sysInstallName);
- char resolvedPath[PATH_MAX];
- if ( realpath(dylibFile, resolvedPath) != NULL )
- entry.override = strdup(resolvedPath);
- else
- entry.override = strdup(dylibFile);
- sDylibOverrides.push_back(entry);
- //dyld::log("added override: %s -> %s\n", entry.installName, entry.override);
- }
- }
- }
- }
-
-}
-
-static void checkDylibOverridesInDir(const char* dirPath)
-{
- //dyld::log("checkDylibOverridesInDir('%s')\n", dirPath);
- char dylibPath[PATH_MAX];
- long dirPathLen = strlcpy(dylibPath, dirPath, PATH_MAX-1);
- if ( dirPathLen >= PATH_MAX )
- return;
- DIR* dirp = opendir(dirPath);
- if ( dirp != NULL) {
- dirent entry;
- dirent* entp = NULL;
- while ( readdir_r(dirp, &entry, &entp) == 0 ) {
- if ( entp == NULL )
- break;
- if ( entp->d_type != DT_REG )
- continue;
- dylibPath[dirPathLen] = '/';
- dylibPath[dirPathLen+1] = '\0';
- if ( strlcat(dylibPath, entp->d_name, PATH_MAX) >= PATH_MAX )
- continue;
- checkDylibOverride(dylibPath);
- }
- closedir(dirp);
- }
-}
-
-
-static void checkFrameworkOverridesInDir(const char* dirPath)
-{
- //dyld::log("checkFrameworkOverridesInDir('%s')\n", dirPath);
- char frameworkPath[PATH_MAX];
- long dirPathLen = strlcpy(frameworkPath, dirPath, PATH_MAX-1);
- if ( dirPathLen >= PATH_MAX )
- return;
- DIR* dirp = opendir(dirPath);
- if ( dirp != NULL) {
- dirent entry;
- dirent* entp = NULL;
- while ( readdir_r(dirp, &entry, &entp) == 0 ) {
- if ( entp == NULL )
- break;
- if ( entp->d_type != DT_DIR )
- continue;
- frameworkPath[dirPathLen] = '/';
- frameworkPath[dirPathLen+1] = '\0';
- int dirNameLen = (int)strlen(entp->d_name);
- if ( dirNameLen < 11 )
- continue;
- if ( strcmp(&entp->d_name[dirNameLen-10], ".framework") != 0 )
- continue;
- if ( strlcat(frameworkPath, entp->d_name, PATH_MAX) >= PATH_MAX )
- continue;
- if ( strlcat(frameworkPath, "/", PATH_MAX) >= PATH_MAX )
- continue;
- if ( strlcat(frameworkPath, entp->d_name, PATH_MAX) >= PATH_MAX )
- continue;
- frameworkPath[strlen(frameworkPath)-10] = '\0';
- checkDylibOverride(frameworkPath);
- }
- closedir(dirp);
- }
-}
-#endif // SUPPORT_VERSIONED_PATHS
-
-
-//
-// Turns a colon separated list of strings into a NULL terminated array
-// of string pointers. If mainExecutableDir param is not NULL,
-// substitutes @loader_path with main executable's dir.
-//
-static const char** parseColonList(const char* list, const char* mainExecutableDir)
-{
- static const char* sEmptyList[] = { NULL };
-
- if ( list[0] == '\0' )
- return sEmptyList;
-
- int colonCount = 0;
- for(const char* s=list; *s != '\0'; ++s) {
- if (*s == ':')
- ++colonCount;
- }
-
- int index = 0;
- const char* start = list;
- char** result = new char*[colonCount+2];
- for(const char* s=list; *s != '\0'; ++s) {
- if (*s == ':') {
- size_t len = s-start;
- if ( (mainExecutableDir != NULL) && (strncmp(start, "@loader_path/", 13) == 0) ) {
- if ( !gLinkContext.allowAtPaths ) {
- dyld::log("dyld: warning: @loader_path/ ignored because of amfi policy\n");
- continue;
- }
- size_t mainExecDirLen = strlen(mainExecutableDir);
- char* str = new char[mainExecDirLen+len+1];
- strcpy(str, mainExecutableDir);
- strlcat(str, &start[13], mainExecDirLen+len+1);
- str[mainExecDirLen+len-13] = '\0';
- start = &s[1];
- result[index++] = str;
- }
- else if ( (mainExecutableDir != NULL) && (strncmp(start, "@executable_path/", 17) == 0) ) {
- if ( !gLinkContext.allowAtPaths ) {
- dyld::log("dyld: warning: @executable_path/ ignored because of amfi policy\n");
- continue;
- }
- size_t mainExecDirLen = strlen(mainExecutableDir);
- char* str = new char[mainExecDirLen+len+1];
- strcpy(str, mainExecutableDir);
- strlcat(str, &start[17], mainExecDirLen+len+1);
- str[mainExecDirLen+len-17] = '\0';
- start = &s[1];
- result[index++] = str;
- }
- else {
- char* str = new char[len+1];
- strncpy(str, start, len);
- str[len] = '\0';
- start = &s[1];
- result[index++] = str;
- }
- }
- }
- size_t len = strlen(start);
- if ( (mainExecutableDir != NULL) && (strncmp(start, "@loader_path/", 13) == 0) ) {
- if ( !gLinkContext.allowAtPaths ) {
- dyld::log("dyld: warning: @loader_path/ ignored because of amfi policy\n");
- }
- else
- {
- size_t mainExecDirLen = strlen(mainExecutableDir);
- char* str = new char[mainExecDirLen+len+1];
- strcpy(str, mainExecutableDir);
- strlcat(str, &start[13], mainExecDirLen+len+1);
- str[mainExecDirLen+len-13] = '\0';
- result[index++] = str;
- }
- }
- else if ( (mainExecutableDir != NULL) && (strncmp(start, "@executable_path/", 17) == 0) ) {
- if ( !gLinkContext.allowAtPaths ) {
- dyld::log("dyld: warning: @executable_path/ ignored because of amfi policy\n");
- }
- else
- {
- size_t mainExecDirLen = strlen(mainExecutableDir);
- char* str = new char[mainExecDirLen+len+1];
- strcpy(str, mainExecutableDir);
- strlcat(str, &start[17], mainExecDirLen+len+1);
- str[mainExecDirLen+len-17] = '\0';
- result[index++] = str;
- }
- }
- else {
- char* str = new char[len+1];
- strcpy(str, start);
- result[index++] = str;
- }
- result[index] = NULL;
-
- //dyld::log("parseColonList(%s)\n", list);
- //for(int i=0; result[i] != NULL; ++i)
- // dyld::log(" %s\n", result[i]);
- return (const char**)result;
-}
-
-static void appendParsedColonList(const char* list, const char* mainExecutableDir, const char* const ** storage)
-{
- const char** newlist = parseColonList(list, mainExecutableDir);
- if ( *storage == NULL ) {
- // first time, just set
- *storage = newlist;
- }
- else {
- // need to append to existing list
- const char* const* existing = *storage;
- int count = 0;
- for(int i=0; existing[i] != NULL; ++i)
- ++count;
- for(int i=0; newlist[i] != NULL; ++i)
- ++count;
- const char** combinedList = new const char*[count+2];
- int index = 0;
- for(int i=0; existing[i] != NULL; ++i)
- combinedList[index++] = existing[i];
- for(int i=0; newlist[i] != NULL; ++i)
- combinedList[index++] = newlist[i];
- combinedList[index] = NULL;
- // leak old arrays
- *storage = combinedList;
- }
-}
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-static void paths_expand_roots(const char **paths, const char *key, const char *val)
-{
-// assert(val != NULL);
-// assert(paths != NULL);
- if(NULL != key) {
- size_t keyLen = strlen(key);
- for(int i=0; paths[i] != NULL; ++i) {
- if ( strncmp(paths[i], key, keyLen) == 0 ) {
- char* newPath = new char[strlen(val) + (strlen(paths[i]) - keyLen) + 1];
- strcpy(newPath, val);
- strcat(newPath, &paths[i][keyLen]);
- paths[i] = newPath;
- }
- }
- }
- return;
-}
-
-static void removePathWithPrefix(const char* paths[], const char* prefix)
-{
- size_t prefixLen = strlen(prefix);
- int skip = 0;
- int i;
- for(i = 0; paths[i] != NULL; ++i) {
- if ( strncmp(paths[i], prefix, prefixLen) == 0 )
- ++skip;
- else
- paths[i-skip] = paths[i];
- }
- paths[i-skip] = NULL;
-}
-#endif
-
-
-#if 0
-static void paths_dump(const char **paths)
-{
-// assert(paths != NULL);
- const char **strs = paths;
- while(*strs != NULL)
- {
- dyld::log("\"%s\"\n", *strs);
- strs++;
- }
- return;
-}
-#endif
-
-
-
-static void printOptions(const char* argv[])
-{
- uint32_t i = 0;
- while ( NULL != argv[i] ) {
- dyld::log("opt[%i] = \"%s\"\n", i, argv[i]);
- i++;
- }
-}
-
-static void printEnvironmentVariables(const char* envp[])
-{
- while ( NULL != *envp ) {
- dyld::log("%s\n", *envp);
- envp++;
- }
-}
-
-void processDyldEnvironmentVariable(const char* key, const char* value, const char* mainExecutableDir)
-{
- if ( strcmp(key, "DYLD_FRAMEWORK_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FRAMEWORK_PATH);
- }
- else if ( strcmp(key, "DYLD_FALLBACK_FRAMEWORK_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FALLBACK_FRAMEWORK_PATH);
- }
- else if ( strcmp(key, "DYLD_LIBRARY_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_LIBRARY_PATH);
- }
- else if ( strcmp(key, "DYLD_FALLBACK_LIBRARY_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FALLBACK_LIBRARY_PATH);
- }
-#if SUPPORT_ROOT_PATH
- else if ( (strcmp(key, "DYLD_ROOT_PATH") == 0) || (strcmp(key, "DYLD_PATHS_ROOT") == 0) ) {
- if ( strcmp(value, "/") != 0 ) {
- gLinkContext.rootPaths = parseColonList(value, mainExecutableDir);
- for (int i=0; gLinkContext.rootPaths[i] != NULL; ++i) {
- if ( gLinkContext.rootPaths[i][0] != '/' ) {
- dyld::warn("DYLD_ROOT_PATH not used because it contains a non-absolute path\n");
- gLinkContext.rootPaths = NULL;
- break;
- }
- }
- }
- }
-#endif
- else if ( strcmp(key, "DYLD_IMAGE_SUFFIX") == 0 ) {
- gLinkContext.imageSuffix = parseColonList(value, NULL);
- }
- else if ( strcmp(key, "DYLD_INSERT_LIBRARIES") == 0 ) {
- sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value, NULL);
-#if SUPPORT_ACCELERATE_TABLES
- sDisableAcceleratorTables = true;
-#endif
- }
- else if ( strcmp(key, "DYLD_PRINT_OPTS") == 0 ) {
- sEnv.DYLD_PRINT_OPTS = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_ENV") == 0 ) {
- sEnv.DYLD_PRINT_ENV = true;
- }
- else if ( strcmp(key, "DYLD_DISABLE_DOFS") == 0 ) {
- sEnv.DYLD_DISABLE_DOFS = true;
- }
- else if ( strcmp(key, "DYLD_DISABLE_PREFETCH") == 0 ) {
- gLinkContext.preFetchDisabled = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_LIBRARIES") == 0 ) {
- gLinkContext.verboseLoading = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_LIBRARIES_POST_LAUNCH") == 0 ) {
- sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH = true;
- }
- else if ( strcmp(key, "DYLD_BIND_AT_LAUNCH") == 0 ) {
- sEnv.DYLD_BIND_AT_LAUNCH = true;
- }
- else if ( strcmp(key, "DYLD_FORCE_FLAT_NAMESPACE") == 0 ) {
- gLinkContext.bindFlat = true;
- }
- else if ( strcmp(key, "DYLD_NEW_LOCAL_SHARED_REGIONS") == 0 ) {
- // ignore, no longer relevant but some scripts still set it
- }
- else if ( strcmp(key, "DYLD_NO_FIX_PREBINDING") == 0 ) {
- }
- else if ( strcmp(key, "DYLD_PREBIND_DEBUG") == 0 ) {
- gLinkContext.verbosePrebinding = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_INITIALIZERS") == 0 ) {
- gLinkContext.verboseInit = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_DOFS") == 0 ) {
- gLinkContext.verboseDOF = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_STATISTICS") == 0 ) {
- sEnv.DYLD_PRINT_STATISTICS = true;
-#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
- // <rdar://problem/26614838> DYLD_PRINT_STATISTICS no longer logs to xcode console for device apps
- sForceStderr = true;
-#endif
- }
- else if ( strcmp(key, "DYLD_PRINT_TO_STDERR") == 0 ) {
-#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
- // <rdar://problem/26633440> DYLD_PRINT_STATISTICS no longer logs to xcode console for device apps
- sForceStderr = true;
-#endif
- }
- else if ( strcmp(key, "DYLD_PRINT_STATISTICS_DETAILS") == 0 ) {
- sEnv.DYLD_PRINT_STATISTICS_DETAILS = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_SEGMENTS") == 0 ) {
- gLinkContext.verboseMapping = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_BINDINGS") == 0 ) {
- gLinkContext.verboseBind = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_WEAK_BINDINGS") == 0 ) {
- gLinkContext.verboseWeakBind = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_REBASINGS") == 0 ) {
- gLinkContext.verboseRebase = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_APIS") == 0 ) {
- gLogAPIs = true;
- }
-#if SUPPORT_ACCELERATE_TABLES
- else if ( strcmp(key, "DYLD_PRINT_APIS_APP") == 0 ) {
- gLogAppAPIs = true;
- }
-#endif
- else if ( strcmp(key, "DYLD_PRINT_WARNINGS") == 0 ) {
- gLinkContext.verboseWarnings = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_RPATHS") == 0 ) {
- gLinkContext.verboseRPaths = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_INTERPOSING") == 0 ) {
- gLinkContext.verboseInterposing = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_CODE_SIGNATURES") == 0 ) {
- gLinkContext.verboseCodeSignatures = true;
- }
- else if ( (strcmp(key, "DYLD_SHARED_REGION") == 0) && gLinkContext.allowEnvVarsSharedCache ) {
- if ( strcmp(value, "private") == 0 ) {
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
- }
- else if ( strcmp(value, "avoid") == 0 ) {
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- }
- else if ( strcmp(value, "use") == 0 ) {
- gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
- }
- else if ( value[0] == '\0' ) {
- gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
- }
- else {
- dyld::warn("unknown option to DYLD_SHARED_REGION. Valid options are: use, private, avoid\n");
- }
- }
- else if ( (strcmp(key, "DYLD_SHARED_CACHE_DIR") == 0) && gLinkContext.allowEnvVarsSharedCache ) {
- sSharedCacheOverrideDir = value;
- }
- else if ( strcmp(key, "DYLD_USE_CLOSURES") == 0 ) {
- if ( dyld3::internalInstall() ) {
-#if __MAC_OS_X_VERSION_MIN_REQUIRED && __i386__
- // don't support dyld3 for 32-bit macOS
-#else
- sEnableClosures = true;
-#endif
- }
- }
- else if ( strcmp(key, "DYLD_IGNORE_PREBINDING") == 0 ) {
- if ( strcmp(value, "all") == 0 ) {
- gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
- }
- else if ( strcmp(value, "app") == 0 ) {
- gLinkContext.prebindUsage = ImageLoader::kUseAllButAppPredbinding;
- }
- else if ( strcmp(value, "nonsplit") == 0 ) {
- gLinkContext.prebindUsage = ImageLoader::kUseSplitSegPrebinding;
- }
- else if ( value[0] == '\0' ) {
- gLinkContext.prebindUsage = ImageLoader::kUseSplitSegPrebinding;
- }
- else {
- dyld::warn("unknown option to DYLD_IGNORE_PREBINDING. Valid options are: all, app, nonsplit\n");
- }
- }
-#if SUPPORT_VERSIONED_PATHS
- else if ( strcmp(key, "DYLD_VERSIONED_LIBRARY_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_VERSIONED_LIBRARY_PATH);
- #if SUPPORT_ACCELERATE_TABLES
- sDisableAcceleratorTables = true;
- #endif
- }
- else if ( strcmp(key, "DYLD_VERSIONED_FRAMEWORK_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_VERSIONED_FRAMEWORK_PATH);
- #if SUPPORT_ACCELERATE_TABLES
- sDisableAcceleratorTables = true;
- #endif
- }
-#endif
-#if !TARGET_IPHONE_SIMULATOR
- else if ( (strcmp(key, "DYLD_PRINT_TO_FILE") == 0) && (mainExecutableDir == NULL) && gLinkContext.allowEnvVarsSharedCache ) {
- int fd = open(value, O_WRONLY | O_CREAT | O_APPEND, 0644);
- if ( fd != -1 ) {
- sLogfile = fd;
- sLogToFile = true;
- }
- else {
- dyld::log("dyld: could not open DYLD_PRINT_TO_FILE='%s', errno=%d\n", value, errno);
- }
- }
- else if ( (strcmp(key, "DYLD_SKIP_MAIN") == 0)) {
- if ( dyld3::internalInstall() )
- sSkipMain = true;
- }
-#endif
- else {
- dyld::warn("unknown environment variable: %s\n", key);
- }
-}
-
-
-#if SUPPORT_LC_DYLD_ENVIRONMENT
-static void checkLoadCommandEnvironmentVariables()
-{
- // <rdar://problem/8440934> Support augmenting dyld environment variables in load commands
- const uint32_t cmd_count = sMainExecutableMachHeader->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)sMainExecutableMachHeader)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_DYLD_ENVIRONMENT:
- {
- const struct dylinker_command* envcmd = (struct dylinker_command*)cmd;
- const char* keyEqualsValue = (char*)envcmd + envcmd->name.offset;
- char mainExecutableDir[strlen(sExecPath)+2];
- strcpy(mainExecutableDir, sExecPath);
- char* lastSlash = strrchr(mainExecutableDir, '/');
- if ( lastSlash != NULL)
- lastSlash[1] = '\0';
- // only process variables that start with DYLD_ and end in _PATH
- if ( (strncmp(keyEqualsValue, "DYLD_", 5) == 0) ) {
- const char* equals = strchr(keyEqualsValue, '=');
- if ( equals != NULL ) {
- if ( strncmp(&equals[-5], "_PATH", 5) == 0 ) {
- const char* value = &equals[1];
- const size_t keyLen = equals-keyEqualsValue;
- // <rdar://problem/22799635> don't let malformed load command overflow stack
- if ( keyLen < 40 ) {
- char key[keyLen+1];
- strncpy(key, keyEqualsValue, keyLen);
- key[keyLen] = '\0';
- //dyld::log("processing: %s\n", keyEqualsValue);
- //dyld::log("mainExecutableDir: %s\n", mainExecutableDir);
- processDyldEnvironmentVariable(key, value, mainExecutableDir);
- }
- }
- }
- }
- }
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-}
-#endif // SUPPORT_LC_DYLD_ENVIRONMENT
-
-
-static bool hasCodeSignatureLoadCommand(const macho_header* mh)
-{
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- if (cmd->cmd == LC_CODE_SIGNATURE)
- return true;
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
- return false;
-}
-
-
-#if SUPPORT_VERSIONED_PATHS
-static void checkVersionedPaths()
-{
- // search DYLD_VERSIONED_LIBRARY_PATH directories for dylibs and check if they are newer
- if ( sEnv.DYLD_VERSIONED_LIBRARY_PATH != NULL ) {
- for(const char* const* lp = sEnv.DYLD_VERSIONED_LIBRARY_PATH; *lp != NULL; ++lp) {
- checkDylibOverridesInDir(*lp);
- }
- }
-
- // search DYLD_VERSIONED_FRAMEWORK_PATH directories for dylibs and check if they are newer
- if ( sEnv.DYLD_VERSIONED_FRAMEWORK_PATH != NULL ) {
- for(const char* const* fp = sEnv.DYLD_VERSIONED_FRAMEWORK_PATH; *fp != NULL; ++fp) {
- checkFrameworkOverridesInDir(*fp);
- }
- }
-}
-#endif
-
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-//
-// For security, setuid programs ignore DYLD_* environment variables.
-// Additionally, the DYLD_* enviroment variables are removed
-// from the environment, so that any child processes don't see them.
-//
-static void pruneEnvironmentVariables(const char* envp[], const char*** applep)
-{
-#if SUPPORT_LC_DYLD_ENVIRONMENT
- checkLoadCommandEnvironmentVariables();
-#endif
-
- // Are we testing dyld on an internal config?
- if ( _simple_getenv(envp, "DYLD_SKIP_MAIN") != NULL ) {
- if ( dyld3::internalInstall() )
- sSkipMain = true;
- }
-
- // delete all DYLD_* and LD_LIBRARY_PATH environment variables
- int removedCount = 0;
- const char** d = envp;
- for(const char** s = envp; *s != NULL; s++) {
-
- if ( (strncmp(*s, "DYLD_", 5) != 0) && (strncmp(*s, "LD_LIBRARY_PATH=", 16) != 0) ) {
- *d++ = *s;
- }
- else {
- ++removedCount;
- }
- }
- *d++ = NULL;
- // slide apple parameters
- if ( removedCount > 0 ) {
- *applep = d;
- do {
- *d = d[removedCount];
- } while ( *d++ != NULL );
- for(int i=0; i < removedCount; ++i)
- *d++ = NULL;
- }
-
- // disable framework and library fallback paths for setuid binaries rdar://problem/4589305
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = NULL;
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = NULL;
-
- if ( removedCount > 0 )
- strlcat(sLoadingCrashMessage, ", ignoring DYLD_* env vars", sizeof(sLoadingCrashMessage));
-}
-#endif
-
-static void defaultUninitializedFallbackPaths(const char* envp[])
-{
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- if ( !gLinkContext.allowClassicFallbackPaths ) {
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = sRestrictedFrameworkFallbackPaths;
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = sRestrictedLibraryFallbackPaths;
- return;
- }
-
- // default value for DYLD_FALLBACK_FRAMEWORK_PATH, if not set in environment
- const char* home = _simple_getenv(envp, "HOME");;
- if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL ) {
- const char** fpaths = sFrameworkFallbackPaths;
- if ( home == NULL )
- removePathWithPrefix(fpaths, "$HOME");
- else
- paths_expand_roots(fpaths, "$HOME", home);
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = fpaths;
- }
-
- // default value for DYLD_FALLBACK_LIBRARY_PATH, if not set in environment
- if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == NULL ) {
- const char** lpaths = sLibraryFallbackPaths;
- if ( home == NULL )
- removePathWithPrefix(lpaths, "$HOME");
- else
- paths_expand_roots(lpaths, "$HOME", home);
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = lpaths;
- }
-#else
- if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL )
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = sFrameworkFallbackPaths;
-
- if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == NULL )
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = sLibraryFallbackPaths;
-#endif
-}
-
-
-static void checkEnvironmentVariables(const char* envp[])
-{
- if ( !gLinkContext.allowEnvVarsPath && !gLinkContext.allowEnvVarsPrint )
- return;
- const char** p;
- for(p = envp; *p != NULL; p++) {
- const char* keyEqualsValue = *p;
- if ( strncmp(keyEqualsValue, "DYLD_", 5) == 0 ) {
- const char* equals = strchr(keyEqualsValue, '=');
- if ( equals != NULL ) {
- strlcat(sLoadingCrashMessage, "\n", sizeof(sLoadingCrashMessage));
- strlcat(sLoadingCrashMessage, keyEqualsValue, sizeof(sLoadingCrashMessage));
- const char* value = &equals[1];
- const size_t keyLen = equals-keyEqualsValue;
- char key[keyLen+1];
- strncpy(key, keyEqualsValue, keyLen);
- key[keyLen] = '\0';
- if ( (strncmp(key, "DYLD_PRINT_", 11) == 0) && !gLinkContext.allowEnvVarsPrint )
- continue;
- processDyldEnvironmentVariable(key, value, NULL);
- }
- }
- else if ( strncmp(keyEqualsValue, "LD_LIBRARY_PATH=", 16) == 0 ) {
- const char* path = &keyEqualsValue[16];
- sEnv.LD_LIBRARY_PATH = parseColonList(path, NULL);
- }
- }
-
-#if SUPPORT_LC_DYLD_ENVIRONMENT
- checkLoadCommandEnvironmentVariables();
-#endif // SUPPORT_LC_DYLD_ENVIRONMENT
-
-#if SUPPORT_ROOT_PATH
- // <rdar://problem/11281064> DYLD_IMAGE_SUFFIX and DYLD_ROOT_PATH cannot be used together
- if ( (gLinkContext.imageSuffix != NULL && *gLinkContext.imageSuffix != NULL) && (gLinkContext.rootPaths != NULL) ) {
- dyld::warn("Ignoring DYLD_IMAGE_SUFFIX because DYLD_ROOT_PATH is used.\n");
- gLinkContext.imageSuffix = NULL; // this leaks allocations from parseColonList
- }
-#endif
-}
-
-#if __x86_64__ && !TARGET_IPHONE_SIMULATOR
-static bool isGCProgram(const macho_header* mh, uintptr_t slide)
-{
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_SEGMENT_COMMAND:
- {
- const struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
- if (strcmp(seg->segname, "__DATA") == 0) {
- const struct macho_section* const sectionsStart = (struct macho_section*)((char*)seg + sizeof(struct macho_segment_command));
- const struct macho_section* const sectionsEnd = §ionsStart[seg->nsects];
- for (const struct macho_section* sect=sectionsStart; sect < sectionsEnd; ++sect) {
- if (strncmp(sect->sectname, "__objc_imageinfo", 16) == 0) {
- const uint32_t* objcInfo = (uint32_t*)(sect->addr + slide);
- return (objcInfo[1] & 6); // 6 = (OBJC_IMAGE_SUPPORTS_GC | OBJC_IMAGE_REQUIRES_GC)
- }
- }
- }
- }
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
- return false;
-}
-#endif
-
-static void getHostInfo(const macho_header* mainExecutableMH, uintptr_t mainExecutableSlide)
-{
-#if CPU_SUBTYPES_SUPPORTED
-#if __ARM_ARCH_7K__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V7K;
-#elif __ARM_ARCH_7A__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V7;
-#elif __ARM_ARCH_6K__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V6;
-#elif __ARM_ARCH_7F__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V7F;
-#elif __ARM_ARCH_7S__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V7S;
-#elif __ARM64_ARCH_8_32__
- sHostCPU = CPU_TYPE_ARM64_32;
- sHostCPUsubtype = CPU_SUBTYPE_ARM64_32_V8;
-#elif __arm64e__
- sHostCPU = CPU_TYPE_ARM64;
- sHostCPUsubtype = CPU_SUBTYPE_ARM64_E;
-#elif __arm64__
- sHostCPU = CPU_TYPE_ARM64;
- sHostCPUsubtype = CPU_SUBTYPE_ARM64_V8;
-#else
- struct host_basic_info info;
- mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
- mach_port_t hostPort = mach_host_self();
- kern_return_t result = host_info(hostPort, HOST_BASIC_INFO, (host_info_t)&info, &count);
- if ( result != KERN_SUCCESS )
- throw "host_info() failed";
- sHostCPU = info.cpu_type;
- sHostCPUsubtype = info.cpu_subtype;
- mach_port_deallocate(mach_task_self(), hostPort);
- #if __x86_64__
- // host_info returns CPU_TYPE_I386 even for x86_64. Override that here so that
- // we don't need to mask the cpu type later.
- sHostCPU = CPU_TYPE_X86_64;
- #if !TARGET_IPHONE_SIMULATOR
- sHaswell = (sHostCPUsubtype == CPU_SUBTYPE_X86_64_H);
- // <rdar://problem/18528074> x86_64h: Fall back to the x86_64 slice if an app requires GC.
- if ( sHaswell ) {
- if ( isGCProgram(mainExecutableMH, mainExecutableSlide) ) {
- // When running a GC program on a haswell machine, don't use and 'h slices
- sHostCPUsubtype = CPU_SUBTYPE_X86_64_ALL;
- sHaswell = false;
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- }
- }
- #endif
- #endif
-#endif
-#endif
-}
-
-static void checkSharedRegionDisable(const dyld3::MachOLoaded* mainExecutableMH, uintptr_t mainExecutableSlide)
-{
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // if main executable has segments that overlap the shared region,
- // then disable using the shared region
- if ( mainExecutableMH->intersectsRange(SHARED_REGION_BASE, SHARED_REGION_SIZE) ) {
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- if ( gLinkContext.verboseMapping )
- dyld::warn("disabling shared region because main executable overlaps\n");
- }
-#if __i386__
- if ( !gLinkContext.allowEnvVarsPath ) {
- // <rdar://problem/15280847> use private or no shared region for suid processes
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
- }
-#endif
-#endif
- // iOS cannot run without shared region
-}
-
-bool validImage(const ImageLoader* possibleImage)
-{
- const size_t imageCount = sAllImages.size();
- for(size_t i=0; i < imageCount; ++i) {
- if ( possibleImage == sAllImages[i] ) {
- return true;
- }
- }
- return false;
-}
-
-uint32_t getImageCount()
-{
- return (uint32_t)sAllImages.size();
-}
-
-ImageLoader* getIndexedImage(unsigned int index)
-{
- if ( index < sAllImages.size() )
- return sAllImages[index];
- return NULL;
-}
-
-ImageLoader* findImageByMachHeader(const struct mach_header* target)
-{
- return findMappedRange((uintptr_t)target);
-}
-
-
-ImageLoader* findImageContainingAddress(const void* addr)
-{
- #if SUPPORT_ACCELERATE_TABLES
- if ( sAllCacheImagesProxy != NULL ) {
- const mach_header* mh;
- const char* path;
- unsigned index;
- if ( sAllCacheImagesProxy->addressInCache(addr, &mh, &path, &index) )
- return sAllCacheImagesProxy;
- }
- #endif
- return findMappedRange((uintptr_t)addr);
-}
-
-
-ImageLoader* findImageContainingSymbol(const void* symbol)
-{
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* anImage = *it;
- if ( anImage->containsSymbol(symbol) )
- return anImage;
- }
- return NULL;
-}
-
-
-
-void forEachImageDo( void (*callback)(ImageLoader*, void* userData), void* userData)
-{
- const size_t imageCount = sAllImages.size();
- for(size_t i=0; i < imageCount; ++i) {
- ImageLoader* anImage = sAllImages[i];
- (*callback)(anImage, userData);
- }
-}
-
-ImageLoader* findLoadedImage(const struct stat& stat_buf)
-{
- const size_t imageCount = sAllImages.size();
- for(size_t i=0; i < imageCount; ++i){
- ImageLoader* anImage = sAllImages[i];
- if ( anImage->statMatch(stat_buf) )
- return anImage;
- }
- return NULL;
-}
-
-// based on ANSI-C strstr()
-static const char* strrstr(const char* str, const char* sub)
-{
- const size_t sublen = strlen(sub);
- for(const char* p = &str[strlen(str)]; p != str; --p) {
- if ( strncmp(p, sub, sublen) == 0 )
- return p;
- }
- return NULL;
-}
-
-
-//
-// Find framework path
-//
-// /path/foo.framework/foo => foo.framework/foo
-// /path/foo.framework/Versions/A/foo => foo.framework/Versions/A/foo
-// /path/foo.framework/Frameworks/bar.framework/bar => bar.framework/bar
-// /path/foo.framework/Libraries/bar.dylb => NULL
-// /path/foo.framework/bar => NULL
-//
-// Returns NULL if not a framework path
-//
-static const char* getFrameworkPartialPath(const char* path)
-{
- const char* dirDot = strrstr(path, ".framework/");
- if ( dirDot != NULL ) {
- const char* dirStart = dirDot;
- for ( ; dirStart >= path; --dirStart) {
- if ( (*dirStart == '/') || (dirStart == path) ) {
- const char* frameworkStart = &dirStart[1];
- if ( dirStart == path )
- --frameworkStart;
- size_t len = dirDot - frameworkStart;
- char framework[len+1];
- strncpy(framework, frameworkStart, len);
- framework[len] = '\0';
- const char* leaf = strrchr(path, '/');
- if ( leaf != NULL ) {
- if ( strcmp(framework, &leaf[1]) == 0 ) {
- return frameworkStart;
- }
- if ( gLinkContext.imageSuffix != NULL ) {
- // some debug frameworks have install names that end in _debug
- if ( strncmp(framework, &leaf[1], len) == 0 ) {
- for (const char* const* suffix=gLinkContext.imageSuffix; *suffix != NULL; ++suffix) {
- if ( strcmp(*suffix, &leaf[len+1]) == 0 )
- return frameworkStart;
- }
- }
- }
- }
- }
- }
- }
- return NULL;
-}
-
-
-static const char* getLibraryLeafName(const char* path)
-{
- const char* start = strrchr(path, '/');
- if ( start != NULL )
- return &start[1];
- else
- return path;
-}
-
-
-// only for architectures that use cpu-sub-types
-#if CPU_SUBTYPES_SUPPORTED
-
-const cpu_subtype_t CPU_SUBTYPE_END_OF_LIST = -1;
-
-
-//
-// A fat file may contain multiple sub-images for the same CPU type.
-// In that case, dyld picks which sub-image to use by scanning a table
-// of preferred cpu-sub-types for the running cpu.
-//
-// There is one row in the table for each cpu-sub-type on which dyld might run.
-// The first entry in a row is that cpu-sub-type. It is followed by all
-// cpu-sub-types that can run on that cpu, if preferred order. Each row ends with
-// a "SUBTYPE_ALL" (to denote that images written to run on any cpu-sub-type are usable),
-// followed by one or more CPU_SUBTYPE_END_OF_LIST to pad out this row.
-//
-
-
-#if __arm__
-//
-// ARM sub-type lists
-//
-const int kARM_RowCount = 8;
-static const cpu_subtype_t kARM[kARM_RowCount][9] = {
-
- // armv7f can run: v7f, v7, v6, v5, and v4
- { CPU_SUBTYPE_ARM_V7F, CPU_SUBTYPE_ARM_V7, CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // armv7k can run: v7k
- { CPU_SUBTYPE_ARM_V7K, CPU_SUBTYPE_END_OF_LIST },
-
- // armv7s can run: v7s, v7, v7f, v7k, v6, v5, and v4
- { CPU_SUBTYPE_ARM_V7S, CPU_SUBTYPE_ARM_V7, CPU_SUBTYPE_ARM_V7F, CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // armv7 can run: v7, v6, v5, and v4
- { CPU_SUBTYPE_ARM_V7, CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // armv6 can run: v6, v5, and v4
- { CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
-
- // xscale can run: xscale, v5, and v4
- { CPU_SUBTYPE_ARM_XSCALE, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
-
- // armv5 can run: v5 and v4
- { CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
-
- // armv4 can run: v4
- { CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
-};
-#endif
-
-#if __arm64__
-//
-// ARM64 sub-type lists
-//
-const int kARM64_RowCount = 2;
-static const cpu_subtype_t kARM64[kARM64_RowCount][4] = {
-
- // armv64e can run: 64e, 64
- { CPU_SUBTYPE_ARM64_E, CPU_SUBTYPE_ARM64_V8, CPU_SUBTYPE_ARM64_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // armv64 can run: 64
- { CPU_SUBTYPE_ARM64_V8, CPU_SUBTYPE_ARM64_ALL, CPU_SUBTYPE_END_OF_LIST },
-};
-
-#if __ARM64_ARCH_8_32__
-const int kARM64_32_RowCount = 2;
-static const cpu_subtype_t kARM64_32[kARM64_32_RowCount][4] = {
-
- // armv64_32 can run: v8
- { CPU_SUBTYPE_ARM64_32_V8, CPU_SUBTYPE_END_OF_LIST },
-
- // armv64 can run: 64
- { CPU_SUBTYPE_ARM64_V8, CPU_SUBTYPE_ARM64_ALL, CPU_SUBTYPE_END_OF_LIST },
-};
-#endif
-
-#endif
-
-#if __x86_64__
-//
-// x86_64 sub-type lists
-//
-const int kX86_64_RowCount = 2;
-static const cpu_subtype_t kX86_64[kX86_64_RowCount][5] = {
-
- // x86_64h can run: x86_64h, x86_64h(lib), x86_64(lib), and x86_64
- { CPU_SUBTYPE_X86_64_H, (cpu_subtype_t)(CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_H), (cpu_subtype_t)(CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_ALL), CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // x86_64 can run: x86_64(lib) and x86_64
- { CPU_SUBTYPE_X86_64_ALL, (cpu_subtype_t)(CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_ALL), CPU_SUBTYPE_END_OF_LIST },
-
-};
-#endif
-
-
-// scan the tables above to find the cpu-sub-type-list for this machine
-static const cpu_subtype_t* findCPUSubtypeList(cpu_type_t cpu, cpu_subtype_t subtype)
-{
- switch (cpu) {
-#if __arm__
- case CPU_TYPE_ARM:
- for (int i=0; i < kARM_RowCount ; ++i) {
- if ( kARM[i][0] == subtype )
- return kARM[i];
- }
- break;
-#endif
-#if __arm64__
- case CPU_TYPE_ARM64:
- for (int i=0; i < kARM64_RowCount ; ++i) {
- if ( kARM64[i][0] == subtype )
- return kARM64[i];
- }
- break;
-
-#if __ARM64_ARCH_8_32__
- case CPU_TYPE_ARM64_32:
- for (int i=0; i < kARM64_32_RowCount ; ++i) {
- if ( kARM64_32[i][0] == subtype )
- return kARM64_32[i];
- }
- break;
-#endif
-
-#endif
-#if __x86_64__
- case CPU_TYPE_X86_64:
- for (int i=0; i < kX86_64_RowCount ; ++i) {
- if ( kX86_64[i][0] == subtype )
- return kX86_64[i];
- }
- break;
-#endif
- }
- return NULL;
-}
-
-
-
-
-// scan fat table-of-contents for best most preferred subtype
-static bool fatFindBestFromOrderedList(cpu_type_t cpu, const cpu_subtype_t list[], const fat_header* fh, uint64_t* offset, uint64_t* len)
-{
- const fat_arch* const archs = (fat_arch*)(((char*)fh)+sizeof(fat_header));
- for (uint32_t subTypeIndex=0; list[subTypeIndex] != CPU_SUBTYPE_END_OF_LIST; ++subTypeIndex) {
- for(uint32_t fatIndex=0; fatIndex < OSSwapBigToHostInt32(fh->nfat_arch); ++fatIndex) {
- if ( ((cpu_type_t)OSSwapBigToHostInt32(archs[fatIndex].cputype) == cpu)
- && (list[subTypeIndex] == (cpu_subtype_t)OSSwapBigToHostInt32(archs[fatIndex].cpusubtype)) ) {
- *offset = OSSwapBigToHostInt32(archs[fatIndex].offset);
- *len = OSSwapBigToHostInt32(archs[fatIndex].size);
- return true;
- }
- }
- }
- return false;
-}
-
-// scan fat table-of-contents for exact match of cpu and cpu-sub-type
-static bool fatFindExactMatch(cpu_type_t cpu, cpu_subtype_t subtype, const fat_header* fh, uint64_t* offset, uint64_t* len)
-{
- const fat_arch* archs = (fat_arch*)(((char*)fh)+sizeof(fat_header));
- for(uint32_t i=0; i < OSSwapBigToHostInt32(fh->nfat_arch); ++i) {
- if ( ((cpu_type_t)OSSwapBigToHostInt32(archs[i].cputype) == cpu)
- && ((cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == subtype) ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- }
- return false;
-}
-
-// scan fat table-of-contents for image with matching cpu-type and runs-on-all-sub-types
-static bool fatFindRunsOnAllCPUs(cpu_type_t cpu, const fat_header* fh, uint64_t* offset, uint64_t* len)
-{
- const fat_arch* archs = (fat_arch*)(((char*)fh)+sizeof(fat_header));
- for(uint32_t i=0; i < OSSwapBigToHostInt32(fh->nfat_arch); ++i) {
- if ( (cpu_type_t)OSSwapBigToHostInt32(archs[i].cputype) == cpu) {
- switch (cpu) {
-#if __arm__
- case CPU_TYPE_ARM:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_ARM_ALL ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- break;
-#endif
-#if __arm64__
- case CPU_TYPE_ARM64:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_ARM64_ALL ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- break;
-#endif
-#if __x86_64__
- case CPU_TYPE_X86_64:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_X86_64_ALL ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- break;
-#endif
- }
- }
- }
- return false;
-}
-
-#endif // CPU_SUBTYPES_SUPPORTED
-
-
-//
-// Validate the fat_header and fat_arch array:
-//
-// 1) arch count would not cause array to extend past 4096 byte read buffer
-// 2) no slice overlaps the fat_header and arch array
-// 3) arch list does not contain duplicate cputype/cpusubtype tuples
-// 4) arch list does not have two overlapping slices.
-//
-static bool fatValidate(const fat_header* fh)
-{
- if ( fh->magic != OSSwapBigToHostInt32(FAT_MAGIC) )
- return false;
-
- // since only first 4096 bytes of file read, we can only handle up to 204 slices.
- const uint32_t sliceCount = OSSwapBigToHostInt32(fh->nfat_arch);
- if ( sliceCount > 204 )
- return false;
-
- // compare all slices looking for conflicts
- const fat_arch* archs = (fat_arch*)(((char*)fh)+sizeof(fat_header));
- for (uint32_t i=0; i < sliceCount; ++i) {
- uint32_t i_offset = OSSwapBigToHostInt32(archs[i].offset);
- uint32_t i_size = OSSwapBigToHostInt32(archs[i].size);
- uint32_t i_cputype = OSSwapBigToHostInt32(archs[i].cputype);
- uint32_t i_cpusubtype = OSSwapBigToHostInt32(archs[i].cpusubtype);
- uint32_t i_end = i_offset + i_size;
- // slice cannot overlap with header
- if ( i_offset < 4096 )
- return false;
- // slice size cannot overflow
- if ( i_end < i_offset )
- return false;
- for (uint32_t j=i+1; j < sliceCount; ++j) {
- uint32_t j_offset = OSSwapBigToHostInt32(archs[j].offset);
- uint32_t j_size = OSSwapBigToHostInt32(archs[j].size);
- uint32_t j_cputype = OSSwapBigToHostInt32(archs[j].cputype);
- uint32_t j_cpusubtype = OSSwapBigToHostInt32(archs[j].cpusubtype);
- uint32_t j_end = j_offset + j_size;
- // duplicate slices types not allowed
- if ( (i_cputype == j_cputype) && (i_cpusubtype == j_cpusubtype) )
- return false;
- // slice size cannot overflow
- if ( j_end < j_offset )
- return false;
- // check for overlap of slices
- if ( i_offset <= j_offset ) {
- if ( j_offset < i_end )
- return false; // j overlaps end of i
- }
- else {
- // j overlaps end of i
- if ( i_offset < j_end )
- return false; // i overlaps end of j
- }
- }
- }
- return true;
-}
-
-//
-// A fat file may contain multiple sub-images for the same cpu-type,
-// each optimized for a different cpu-sub-type (e.g G3 or G5).
-// This routine picks the optimal sub-image.
-//
-static bool fatFindBest(const fat_header* fh, uint64_t* offset, uint64_t* len)
-{
- if ( !fatValidate(fh) )
- return false;
-
-#if CPU_SUBTYPES_SUPPORTED
- // assume all dylibs loaded must have same cpu type as main executable
- const cpu_type_t cpu = sMainExecutableMachHeader->cputype;
-
- // We only know the subtype to use if the main executable cpu type matches the host
- if ( cpu == sHostCPU ) {
- // get preference ordered list of subtypes
- const cpu_subtype_t* subTypePreferenceList = findCPUSubtypeList(cpu, sHostCPUsubtype);
-
- // use ordered list to find best sub-image in fat file
- if ( subTypePreferenceList != NULL ) {
- if ( fatFindBestFromOrderedList(cpu, subTypePreferenceList, fh, offset, len) )
- return true;
- }
-
- // if running cpu is not in list, try for an exact match
- if ( fatFindExactMatch(cpu, sHostCPUsubtype, fh, offset, len) )
- return true;
- }
-
- // running on an uknown cpu, can only load generic code
- return fatFindRunsOnAllCPUs(cpu, fh, offset, len);
-#else
- // just find first slice with matching architecture
- const fat_arch* archs = (fat_arch*)(((char*)fh)+sizeof(fat_header));
- for(uint32_t i=0; i < OSSwapBigToHostInt32(fh->nfat_arch); ++i) {
- if ( (cpu_type_t)OSSwapBigToHostInt32(archs[i].cputype) == sMainExecutableMachHeader->cputype) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- }
- return false;
-#endif
-}
-
-
-
-//
-// This is used to validate if a non-fat (aka thin or raw) mach-o file can be used
-// on the current processor. //
-bool isCompatibleMachO(const uint8_t* firstPage, const char* path)
-{
-#if CPU_SUBTYPES_SUPPORTED
- // It is deemed compatible if any of the following are true:
- // 1) mach_header subtype is in list of compatible subtypes for running processor
- // 2) mach_header subtype is same as running processor subtype
- // 3) mach_header subtype runs on all processor variants
- const mach_header* mh = (mach_header*)firstPage;
- if ( mh->magic == sMainExecutableMachHeader->magic ) {
- if ( mh->cputype == sMainExecutableMachHeader->cputype ) {
- if ( mh->cputype == sHostCPU ) {
- // get preference ordered list of subtypes that this machine can use
- const cpu_subtype_t* subTypePreferenceList = findCPUSubtypeList(mh->cputype, sHostCPUsubtype);
- if ( subTypePreferenceList != NULL ) {
- // if image's subtype is in the list, it is compatible
- for (const cpu_subtype_t* p = subTypePreferenceList; *p != CPU_SUBTYPE_END_OF_LIST; ++p) {
- if ( *p == mh->cpusubtype )
- return true;
- }
- // have list and not in list, so not compatible
- throwf("incompatible cpu-subtype: 0x%08X in %s", mh->cpusubtype, path);
- }
- // unknown cpu sub-type, but if exact match for current subtype then ok to use
- if ( mh->cpusubtype == sHostCPUsubtype )
- return true;
- }
-
- // cpu type has no ordered list of subtypes
- switch (mh->cputype) {
- case CPU_TYPE_I386:
- case CPU_TYPE_X86_64:
- // subtypes are not used or these architectures
- return true;
- }
- }
- }
-#else
- // For architectures that don't support cpu-sub-types
- // this just check the cpu type.
- const mach_header* mh = (mach_header*)firstPage;
- if ( mh->magic == sMainExecutableMachHeader->magic ) {
- if ( mh->cputype == sMainExecutableMachHeader->cputype ) {
- return true;
- }
- }
-#endif
- return false;
-}
-
-
-
-
-// The kernel maps in main executable before dyld gets control. We need to
-// make an ImageLoader* for the already mapped in main executable.
-static ImageLoaderMachO* instantiateFromLoadedImage(const macho_header* mh, uintptr_t slide, const char* path)
-{
- // try mach-o loader
- if ( isCompatibleMachO((const uint8_t*)mh, path) ) {
- ImageLoader* image = ImageLoaderMachO::instantiateMainExecutable(mh, slide, path, gLinkContext);
- addImage(image);
- return (ImageLoaderMachO*)image;
- }
-
- throw "main executable not a known format";
-}
-
-#if SUPPORT_ACCELERATE_TABLES
-static bool dylibsCanOverrideCache()
-{
- if ( !dyld3::internalInstall() )
- return false;
- return ( (sSharedCacheLoadInfo.loadAddress != nullptr) && (sSharedCacheLoadInfo.loadAddress->header.cacheType == kDyldSharedCacheTypeDevelopment) );
-}
-#endif
-
-const void* imMemorySharedCacheHeader()
-{
- return sSharedCacheLoadInfo.loadAddress;
-}
-
-
-const char* getStandardSharedCacheFilePath()
-{
- if ( sSharedCacheLoadInfo.loadAddress != nullptr )
- return sSharedCacheLoadInfo.path;
- else
- return nullptr;
-}
-
-
-static bool findInSharedCacheImage(const char* path, bool searchByPath, const struct stat* stat_buf, const macho_header** mh, const char** pathInCache, long* slide)
-{
- dyld3::SharedCacheFindDylibResults results;
- if ( dyld3::findInSharedCacheImage(sSharedCacheLoadInfo, path, &results) ) {
- *mh = (macho_header*)results.mhInCache;
- *pathInCache = results.pathInCache;
- *slide = results.slideInCache;
- return true;
- }
- return false;
-}
-
-bool inSharedCache(const char* path)
-{
- return dyld3::pathIsInSharedCacheImage(sSharedCacheLoadInfo, path);
-}
-
-
-static ImageLoader* checkandAddImage(ImageLoader* image, const LoadContext& context)
-{
- // now sanity check that this loaded image does not have the same install path as any existing image
- const char* loadedImageInstallPath = image->getInstallPath();
- if ( image->isDylib() && (loadedImageInstallPath != NULL) && (loadedImageInstallPath[0] == '/') ) {
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* anImage = *it;
- const char* installPath = anImage->getInstallPath();
- if ( installPath != NULL) {
- if ( strcmp(loadedImageInstallPath, installPath) == 0 ) {
- //dyld::log("duplicate(%s) => %p\n", installPath, anImage);
- removeImage(image);
- ImageLoader::deleteImage(image);
- return anImage;
- }
- }
- }
- }
-
- // some API's restrict what they can load
- if ( context.mustBeBundle && !image->isBundle() )
- throw "not a bundle";
- if ( context.mustBeDylib && !image->isDylib() )
- throw "not a dylib";
-
- // regular main executables cannot be loaded
- if ( image->isExecutable() ) {
- if ( !context.canBePIE || !image->isPositionIndependentExecutable() )
- throw "can't load a main executable";
- }
-
- // don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
- if ( ! image->isBundle() )
- addImage(image);
-
- return image;
-}
-
-#if TARGET_IPHONE_SIMULATOR
-static bool isSimulatorBinary(const uint8_t* firstPages, const char* path)
-{
- const macho_header* mh = (macho_header*)firstPages;
- const uint32_t cmd_count = mh->ncmds;
- const load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const load_command* const cmdsEnd = (load_command*)((char*)cmds + mh->sizeofcmds);
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- #if TARGET_OS_WATCH
- case LC_VERSION_MIN_WATCHOS:
- return true;
- #elif TARGET_OS_TV
- case LC_VERSION_MIN_TVOS:
- return true;
- #elif TARGET_OS_IOS
- case LC_VERSION_MIN_IPHONEOS:
- return true;
- #endif
- case LC_VERSION_MIN_MACOSX:
- // grandfather in a few libSystem dylibs
- if ((strcmp(path, "/usr/lib/system/libsystem_kernel.dylib") == 0) ||
- (strcmp(path, "/usr/lib/system/libsystem_platform.dylib") == 0) ||
- (strcmp(path, "/usr/lib/system/libsystem_pthread.dylib") == 0) ||
- (strcmp(path, "/usr/lib/system/libsystem_platform_debug.dylib") == 0) ||
- (strcmp(path, "/usr/lib/system/libsystem_pthread_debug.dylib") == 0))
- return true;
- return false;
- case LC_BUILD_VERSION:
- {
- // Same logic as above, but for LC_BUILD_VERSION instead of legacy load commands
- const struct build_version_command* buildVersionCmd = (build_version_command*)cmd;
- switch(buildVersionCmd->platform) {
- case PLATFORM_IOSSIMULATOR:
- case PLATFORM_TVOSSIMULATOR:
- case PLATFORM_WATCHOSSIMULATOR:
- case PLATFORM_WATCHOS:
- return true;
- #if TARGET_OS_IOSMAC
- case 6:
- return true;
- #endif
- case PLATFORM_MACOS:
- if ((strcmp(path, "/usr/lib/system/libsystem_kernel.dylib") == 0) ||
- (strcmp(path, "/usr/lib/system/libsystem_platform.dylib") == 0) ||
- (strcmp(path, "/usr/lib/system/libsystem_pthread.dylib") == 0) ||
- (strcmp(path, "/usr/lib/system/libsystem_platform_debug.dylib") == 0) ||
- (strcmp(path, "/usr/lib/system/libsystem_pthread_debug.dylib") == 0))
- return true;
- }
- }
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- if ( cmd > cmdsEnd )
- return false;
- }
- return false;
-}
-#endif
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-static bool iOSMacWhiteListed(const char* path)
-{
- static char* whiteListBuffer = nullptr;
- static size_t whiteListSize = 0;
- static bool tried = false;
- if ( !tried ) {
- // only try to map file once
- whiteListBuffer = (char*)mapFileReadOnly("/System/iOSSupport/dyld/macOS-whitelist.txt", whiteListSize);
- tried = true;
- }
- __block bool result = false;
- if ( whiteListBuffer != nullptr ) {
- dyld3::forEachLineInFile(whiteListBuffer, whiteListSize, ^(const char* line, bool& stop) {
- // lines in the file are prefixes. Any path that starts with one of these lines is allowed to be unzippered
- size_t lineLen = strlen(line);
- if ( (*line == '/') && strncmp(line, path, lineLen) == 0 ) {
- result = true;
- stop = true;
- }
- });
- }
- return result;
-}
-
-static bool iOSMacBlackListed(const char* path)
-{
- static char* blackListBuffer = nullptr;
- static size_t blackListSize = 0;
- static bool tried = false;
- if ( !tried ) {
- // only try to map file once
- blackListBuffer = (char*)mapFileReadOnly("/System/iOSSupport/dyld/macOS-blacklist.txt", blackListSize);
- tried = true;
- }
- __block bool result = false;
- if ( blackListBuffer != nullptr ) {
- dyld3::forEachLineInFile(blackListBuffer, blackListSize, ^(const char* line, bool& stop) {
- // lines in the file are prefixes. Any path that starts with one of these lines is allowed to be unzippered
- size_t lineLen = strlen(line);
- if ( (*line == '/') && strncmp(line, path, lineLen) == 0 ) {
- result = true;
- stop = true;
- }
- });
- }
- return result;
-}
-
-
-#endif
-
-// map in file and instantiate an ImageLoader
-static ImageLoader* loadPhase6(int fd, const struct stat& stat_buf, const char* path, const LoadContext& context)
-{
- //dyld::log("%s(%s)\n", __func__ , path);
- uint64_t fileOffset = 0;
- uint64_t fileLength = stat_buf.st_size;
-
- // validate it is a file (not directory)
- if ( (stat_buf.st_mode & S_IFMT) != S_IFREG )
- throw "not a file";
-
- uint8_t firstPages[MAX_MACH_O_HEADER_AND_LOAD_COMMANDS_SIZE];
- uint8_t *firstPagesPtr = firstPages;
- bool shortPage = false;
-
- // min mach-o file is 4K
- if ( fileLength < 4096 ) {
- if ( pread(fd, firstPages, (size_t)fileLength, 0) != (ssize_t)fileLength )
- throwf("pread of short file failed: %d", errno);
- shortPage = true;
- }
- else {
- // optimistically read only first 4KB
- if ( pread(fd, firstPages, 4096, 0) != 4096 )
- throwf("pread of first 4K failed: %d", errno);
- }
-
- // if fat wrapper, find usable sub-file
- const fat_header* fileStartAsFat = (fat_header*)firstPages;
- if ( fileStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
- if ( OSSwapBigToHostInt32(fileStartAsFat->nfat_arch) > ((4096 - sizeof(fat_header)) / sizeof(fat_arch)) )
- throwf("fat header too large: %u entries", OSSwapBigToHostInt32(fileStartAsFat->nfat_arch));
- if ( fatFindBest(fileStartAsFat, &fileOffset, &fileLength) ) {
- if ( (fileOffset+fileLength) > (uint64_t)(stat_buf.st_size) )
- throwf("truncated fat file. file length=%llu, but needed slice goes to %llu", stat_buf.st_size, fileOffset+fileLength);
- if (pread(fd, firstPages, 4096, fileOffset) != 4096)
- throwf("pread of fat file failed: %d", errno);
- }
- else {
- throw "no matching architecture in universal wrapper";
- }
- }
-
- // try mach-o loader
- if ( shortPage )
- throw "file too short";
-
- if ( isCompatibleMachO(firstPages, path) ) {
-
- // only MH_BUNDLE, MH_DYLIB, and some MH_EXECUTE can be dynamically loaded
- const mach_header* mh = (mach_header*)firstPages;
- switch ( mh->filetype ) {
- case MH_EXECUTE:
- case MH_DYLIB:
- case MH_BUNDLE:
- break;
- default:
- throw "mach-o, but wrong filetype";
- }
-
- uint32_t headerAndLoadCommandsSize = sizeof(macho_header) + mh->sizeofcmds;
- if ( headerAndLoadCommandsSize > MAX_MACH_O_HEADER_AND_LOAD_COMMANDS_SIZE )
- throwf("malformed mach-o: load commands size (%u) > %u", headerAndLoadCommandsSize, MAX_MACH_O_HEADER_AND_LOAD_COMMANDS_SIZE);
-
- if ( headerAndLoadCommandsSize > fileLength )
- dyld::throwf("malformed mach-o: load commands size (%u) > mach-o file size (%llu)", headerAndLoadCommandsSize, fileLength);
-
- if ( headerAndLoadCommandsSize > 4096 ) {
- // read more pages
- unsigned readAmount = headerAndLoadCommandsSize - 4096;
- if ( pread(fd, &firstPages[4096], readAmount, fileOffset+4096) != readAmount )
- throwf("pread of extra load commands past 4KB failed: %d", errno);
- }
-
-#if TARGET_IPHONE_SIMULATOR
- // <rdar://problem/14168872> dyld_sim should restrict loading osx binaries
- if ( !isSimulatorBinary(firstPages, path) ) {
- #if TARGET_OS_WATCH
- throw "mach-o, but not built for watchOS simulator";
- #elif TARGET_OS_TV
- throw "mach-o, but not built for tvOS simulator";
- #else
- throw "mach-o, but not built for iOS simulator";
- #endif
- }
-#endif
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- if ( gLinkContext.marzipan ) {
- const dyld3::MachOFile* mf = (dyld3::MachOFile*)firstPages;
- bool isiOSMacBinary = mf->supportsPlatform(dyld3::Platform::iOSMac) || iOSMacWhiteListed(path);
- bool isProhibitedMacOSBinary = !isiOSMacBinary && iOSMacBlackListed(path);
- if ( (context.enforceIOSMac && !isiOSMacBinary) || isProhibitedMacOSBinary ) {
- throw "mach-o, but not built for iOSMac";
- }
- }
-#endif
-
-#if __arm64e__
- if ( (sMainExecutableMachHeader->cpusubtype == CPU_SUBTYPE_ARM64_E) && (mh->cpusubtype != CPU_SUBTYPE_ARM64_E) )
- throw "arm64 dylibs cannot be loaded into arm64e processes";
-#endif
- ImageLoader* image = nullptr;
- {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_MAP_IMAGE, path, 0, 0);
- image = ImageLoaderMachO::instantiateFromFile(path, fd, firstPagesPtr, headerAndLoadCommandsSize, fileOffset, fileLength, stat_buf, gLinkContext);
- timer.setData4((uint64_t)image->machHeader());
- }
-
- // validate
- return checkandAddImage(image, context);
- }
-
- // try other file formats here...
-
-
- // throw error about what was found
- switch (*(uint32_t*)firstPages) {
- case MH_MAGIC:
- case MH_CIGAM:
- case MH_MAGIC_64:
- case MH_CIGAM_64:
- throw "mach-o, but wrong architecture";
- default:
- throwf("unknown file type, first eight bytes: 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
- firstPages[0], firstPages[1], firstPages[2], firstPages[3], firstPages[4], firstPages[5], firstPages[6],firstPages[7]);
- }
-}
-
-
-static ImageLoader* loadPhase5open(const char* path, const LoadContext& context, const struct stat& stat_buf, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
-
- // open file (automagically closed when this function exits)
- FileOpener file(path);
-
- // just return NULL if file not found, but record any other errors
- if ( file.getFileDescriptor() == -1 ) {
- int err = errno;
- if ( err != ENOENT ) {
- const char* newMsg;
- if ( (err == EPERM) && sandboxBlockedOpen(path) )
- newMsg = dyld::mkstringf("file system sandbox blocked open() of '%s'", path);
- else
- newMsg = dyld::mkstringf("%s: open() failed with errno=%d", path, err);
- exceptions->push_back(newMsg);
- }
- return NULL;
- }
-
- try {
- return loadPhase6(file.getFileDescriptor(), stat_buf, path, context);
- }
- catch (const char* msg) {
- const char* newMsg = dyld::mkstringf("%s: %s", path, msg);
- exceptions->push_back(newMsg);
- free((void*)msg);
- return NULL;
- }
-}
-
-
-
-// try to open file
-static ImageLoader* loadPhase5load(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
-#if SUPPORT_ACCELERATE_TABLES
- if ( sAllCacheImagesProxy != NULL ) {
- if ( sAllCacheImagesProxy->hasDylib(path, &cacheIndex) )
- return sAllCacheImagesProxy;
- }
-#endif
-#if TARGET_IPHONE_SIMULATOR
- // in simulators, 'path' has DYLD_ROOT_PATH prepended, but cache index does not have the prefix, so use orgPath
- const char* pathToFindInCache = orgPath;
-#else
- const char* pathToFindInCache = path;
-#endif
- uint statErrNo;
- struct stat statBuf;
- bool didStat = false;
- bool existsOnDisk;
- dyld3::SharedCacheFindDylibResults shareCacheResults;
- shareCacheResults.image = nullptr;
- if ( dyld3::findInSharedCacheImage(sSharedCacheLoadInfo, pathToFindInCache, &shareCacheResults) ) {
- // see if this image in the cache was already loaded via a different path
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); ++it) {
- ImageLoader* anImage = *it;
- if ( (const mach_header*)anImage->machHeader() == shareCacheResults.mhInCache )
- return anImage;
- }
- // if RTLD_NOLOAD, do nothing if not already loaded
- if ( context.dontLoad ) {
- // <rdar://33412890> possible that there is an override of cache
- if ( my_stat(path, &statBuf) == 0 ) {
- ImageLoader* imageLoader = findLoadedImage(statBuf);
- if ( imageLoader != NULL )
- return imageLoader;
- }
- return NULL;
- }
- bool useCache = false;
- if ( shareCacheResults.image == nullptr ) {
- // HACK to support old caches
- existsOnDisk = ( my_stat(path, &statBuf) == 0 );
- didStat = true;
- statErrNo = errno;
- useCache = !existsOnDisk;
- }
- else {
- // <rdar://problem/7014995> zero out stat buffer so mtime, etc are zero for items from the shared cache
- bzero(&statBuf, sizeof(statBuf));
- if ( shareCacheResults.image->overridableDylib() ) {
- existsOnDisk = ( my_stat(path, &statBuf) == 0 );
- didStat = true;
- statErrNo = errno;
- if ( sSharedCacheLoadInfo.loadAddress->header.dylibsExpectedOnDisk ) {
- uint64_t expectedINode;
- uint64_t expectedMtime;
- if ( shareCacheResults.image->hasFileModTimeAndInode(expectedINode, expectedMtime) ) {
- if ( (expectedMtime == statBuf.st_mtime) && (expectedINode == statBuf.st_ino) )
- useCache = true;
- }
- }
- else {
- if ( !existsOnDisk )
- useCache = true;
- }
- }
- else {
- useCache = true;
- }
- }
- if ( useCache ) {
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- if ( gLinkContext.marzipan ) {
- const dyld3::MachOFile* mf = (dyld3::MachOFile*)shareCacheResults.mhInCache;
- bool isiOSMacBinary = mf->supportsPlatform(dyld3::Platform::iOSMac) || iOSMacWhiteListed(path);
- bool isProhibitedMacOSBinary = !isiOSMacBinary && iOSMacBlackListed(path);
- if ( (context.enforceIOSMac && !isiOSMacBinary) || isProhibitedMacOSBinary ) {
- throw "mach-o, but not built for iOSMac";
- }
- }
-#endif
- ImageLoader* imageLoader = ImageLoaderMachO::instantiateFromCache((macho_header*)shareCacheResults.mhInCache, shareCacheResults.pathInCache, shareCacheResults.slideInCache, statBuf, gLinkContext);
- return checkandAddImage(imageLoader, context);
- }
- }
-
- // not in cache or cache not usable
- if ( !didStat ) {
- existsOnDisk = ( my_stat(path, &statBuf) == 0 );
- statErrNo = errno;
- }
- if ( existsOnDisk ) {
- // in case image was renamed or found via symlinks, check for inode match
- ImageLoader* imageLoader = findLoadedImage(statBuf);
- if ( imageLoader != NULL )
- return imageLoader;
- // do nothing if not already loaded and if RTLD_NOLOAD
- if ( context.dontLoad )
- return NULL;
- // try opening file
- imageLoader = loadPhase5open(path, context, statBuf, exceptions);
- if ( imageLoader != NULL ) {
- if ( shareCacheResults.image != nullptr ) {
- // if image was found in cache, but is overridden by a newer file on disk, record what the image overrides
- imageLoader->setOverridesCachedDylib(shareCacheResults.image->imageNum());
- }
- return imageLoader;
- }
- }
-
- // just return NULL if file not found, but record any other errors
- if ( (statErrNo != ENOENT) && (statErrNo != 0) ) {
- if ( (statErrNo == EPERM) && sandboxBlockedStat(path) )
- exceptions->push_back(dyld::mkstringf("%s: file system sandbox blocked stat()", path));
- else
- exceptions->push_back(dyld::mkstringf("%s: stat() failed with errno=%d", path, statErrNo));
- }
- return NULL;
-}
-
-// look for path match with existing loaded images
-static ImageLoader* loadPhase5check(const char* path, const char* orgPath, const LoadContext& context)
-{
- //dyld::log("%s(%s, %s)\n", __func__ , path, orgPath);
- // search path against load-path and install-path of all already loaded images
- uint32_t hash = ImageLoader::hash(path);
- //dyld::log("check() hash=%d, path=%s\n", hash, path);
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* anImage = *it;
- // check hash first to cut down on strcmp calls
- //dyld::log(" check() hash=%d, path=%s\n", anImage->getPathHash(), anImage->getPath());
- if ( anImage->getPathHash() == hash ) {
- if ( strcmp(path, anImage->getPath()) == 0 ) {
- // if we are looking for a dylib don't return something else
- if ( !context.mustBeDylib || anImage->isDylib() )
- return anImage;
- }
- }
- if ( context.matchByInstallName || anImage->matchInstallPath() ) {
- const char* installPath = anImage->getInstallPath();
- if ( installPath != NULL) {
- if ( strcmp(path, installPath) == 0 ) {
- // if we are looking for a dylib don't return something else
- if ( !context.mustBeDylib || anImage->isDylib() )
- return anImage;
- }
- }
- }
- // an install name starting with @rpath should match by install name, not just real path
- if ( (orgPath[0] == '@') && (strncmp(orgPath, "@rpath/", 7) == 0) ) {
- const char* installPath = anImage->getInstallPath();
- if ( installPath != NULL) {
- if ( !context.mustBeDylib || anImage->isDylib() ) {
- if ( strcmp(orgPath, installPath) == 0 )
- return anImage;
- }
- }
- }
- }
-
- //dyld::log("%s(%s) => NULL\n", __func__, path);
- return NULL;
-}
-
-
-// open or check existing
-static ImageLoader* loadPhase5(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
-
- // check for specific dylib overrides
- for (std::vector<DylibOverride>::iterator it = sDylibOverrides.begin(); it != sDylibOverrides.end(); ++it) {
- if ( strcmp(it->installName, path) == 0 ) {
- path = it->override;
- break;
- }
- }
-
- if ( exceptions != NULL )
- return loadPhase5load(path, orgPath, context, cacheIndex, exceptions);
- else
- return loadPhase5check(path, orgPath, context);
-}
-
-// try with and without image suffix
-static ImageLoader* loadPhase4(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
- ImageLoader* image = NULL;
- if ( gLinkContext.imageSuffix != NULL ) {
- for (const char* const* suffix=gLinkContext.imageSuffix; *suffix != NULL; ++suffix) {
- char pathWithSuffix[strlen(path)+strlen(*suffix)+2];
- ImageLoader::addSuffix(path, *suffix, pathWithSuffix);
- image = loadPhase5(pathWithSuffix, orgPath, context, cacheIndex, exceptions);
- if ( image != NULL )
- break;
- }
- if ( image != NULL ) {
- // if original path is in the dyld cache, then mark this one found as an override
- dyld3::SharedCacheFindDylibResults shareCacheResults;
- if ( dyld3::findInSharedCacheImage(sSharedCacheLoadInfo, path, &shareCacheResults) && (shareCacheResults.image != nullptr) )
- image->setOverridesCachedDylib(shareCacheResults.image->imageNum());
- }
- }
- if ( image == NULL )
- image = loadPhase5(path, orgPath, context, cacheIndex, exceptions);
- return image;
-}
-
-static ImageLoader* loadPhase2(const char* path, const char* orgPath, const LoadContext& context,
- const char* const frameworkPaths[], const char* const libraryPaths[],
- unsigned& cacheIndex, std::vector<const char*>* exceptions); // forward reference
-
-
-// expand @ variables
-static ImageLoader* loadPhase3(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
- ImageLoader* image = NULL;
- if ( strncmp(path, "@executable_path/", 17) == 0 ) {
- // executable_path cannot be in used in any binary in a setuid process rdar://problem/4589305
- if ( !gLinkContext.allowAtPaths )
- throwf("unsafe use of @executable_path in %s with restricted binary", context.origin);
- // handle @executable_path path prefix
- const char* executablePath = sExecPath;
- char newPath[strlen(executablePath) + strlen(path)];
- strcpy(newPath, executablePath);
- char* addPoint = strrchr(newPath,'/');
- if ( addPoint != NULL )
- strcpy(&addPoint[1], &path[17]);
- else
- strcpy(newPath, &path[17]);
- image = loadPhase4(newPath, orgPath, context, cacheIndex, exceptions);
- if ( image != NULL )
- return image;
-
- // perhaps main executable path is a sym link, find realpath and retry
- char resolvedPath[PATH_MAX];
- if ( realpath(sExecPath, resolvedPath) != NULL ) {
- char newRealPath[strlen(resolvedPath) + strlen(path)];
- strcpy(newRealPath, resolvedPath);
- addPoint = strrchr(newRealPath,'/');
- if ( addPoint != NULL )
- strcpy(&addPoint[1], &path[17]);
- else
- strcpy(newRealPath, &path[17]);
- image = loadPhase4(newRealPath, orgPath, context, cacheIndex, exceptions);
- if ( image != NULL )
- return image;
- }
- }
- else if ( (strncmp(path, "@loader_path/", 13) == 0) && (context.origin != NULL) ) {
- // @loader_path cannot be used from the main executable of a setuid process rdar://problem/4589305
- if ( !gLinkContext.allowAtPaths && (strcmp(context.origin, sExecPath) == 0) )
- throwf("unsafe use of @loader_path in %s with restricted binary", context.origin);
- // handle @loader_path path prefix
- char newPath[strlen(context.origin) + strlen(path)];
- strcpy(newPath, context.origin);
- char* addPoint = strrchr(newPath,'/');
- if ( addPoint != NULL )
- strcpy(&addPoint[1], &path[13]);
- else
- strcpy(newPath, &path[13]);
- image = loadPhase4(newPath, orgPath, context, cacheIndex, exceptions);
- if ( image != NULL )
- return image;
-
- // perhaps loader path is a sym link, find realpath and retry
- char resolvedPath[PATH_MAX];
- if ( realpath(context.origin, resolvedPath) != NULL ) {
- char newRealPath[strlen(resolvedPath) + strlen(path)];
- strcpy(newRealPath, resolvedPath);
- addPoint = strrchr(newRealPath,'/');
- if ( addPoint != NULL )
- strcpy(&addPoint[1], &path[13]);
- else
- strcpy(newRealPath, &path[13]);
- image = loadPhase4(newRealPath, orgPath, context, cacheIndex, exceptions);
- if ( image != NULL )
- return image;
- }
- }
- else if ( context.implicitRPath || (strncmp(path, "@rpath/", 7) == 0) ) {
- const char* trailingPath = (strncmp(path, "@rpath/", 7) == 0) ? &path[7] : path;
- // substitute @rpath with all -rpath paths up the load chain
- for(const ImageLoader::RPathChain* rp=context.rpath; rp != NULL; rp=rp->next) {
- if (rp->paths != NULL ) {
- for(std::vector<const char*>::iterator it=rp->paths->begin(); it != rp->paths->end(); ++it) {
- const char* anRPath = *it;
- char newPath[strlen(anRPath) + strlen(trailingPath)+2];
- strcpy(newPath, anRPath);
- if ( newPath[strlen(newPath)-1] != '/' )
- strcat(newPath, "/");
- strcat(newPath, trailingPath);
- image = loadPhase4(newPath, orgPath, context, cacheIndex, exceptions);
- if ( gLinkContext.verboseRPaths && (exceptions != NULL) ) {
- if ( image != NULL )
- dyld::log("RPATH successful expansion of %s to: %s\n", orgPath, newPath);
- else
- dyld::log("RPATH failed to expanding %s to: %s\n", orgPath, newPath);
- }
- if ( image != NULL )
- return image;
- }
- }
- }
-
- // substitute @rpath with LD_LIBRARY_PATH
- if ( sEnv.LD_LIBRARY_PATH != NULL ) {
- image = loadPhase2(trailingPath, orgPath, context, NULL, sEnv.LD_LIBRARY_PATH, cacheIndex, exceptions);
- if ( image != NULL )
- return image;
- }
-
- // if this is the "open" pass, don't try to open @rpath/... as a relative path
- if ( (exceptions != NULL) && (trailingPath != path) )
- return NULL;
- }
- else if ( !gLinkContext.allowEnvVarsPath && (path[0] != '/' ) ) {
- throwf("unsafe use of relative rpath %s in %s with restricted binary", path, context.origin);
- }
-
- return loadPhase4(path, orgPath, context, cacheIndex, exceptions);
-}
-
-static ImageLoader* loadPhase2cache(const char* path, const char *orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions) {
- ImageLoader* image = NULL;
-#if !TARGET_IPHONE_SIMULATOR
- if ( exceptions != NULL) {
- char resolvedPath[PATH_MAX];
- realpath(path, resolvedPath);
- int myerr = errno;
- // If realpath() resolves to a path which does not exist on disk, errno is set to ENOENT
- if ( (myerr == ENOENT) || (myerr == 0) )
- {
- image = loadPhase4(resolvedPath, orgPath, context, cacheIndex, exceptions);
- }
- }
-#endif
- return image;
-}
-
-
-// try search paths
-static ImageLoader* loadPhase2(const char* path, const char* orgPath, const LoadContext& context,
- const char* const frameworkPaths[], const char* const libraryPaths[],
- unsigned& cacheIndex, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
- ImageLoader* image = NULL;
- const char* frameworkPartialPath = getFrameworkPartialPath(path);
- if ( frameworkPaths != NULL ) {
- if ( frameworkPartialPath != NULL ) {
- const size_t frameworkPartialPathLen = strlen(frameworkPartialPath);
- for(const char* const* fp = frameworkPaths; *fp != NULL; ++fp) {
- char npath[strlen(*fp)+frameworkPartialPathLen+8];
- strcpy(npath, *fp);
- strcat(npath, "/");
- strcat(npath, frameworkPartialPath);
- //dyld::log("dyld: fallback framework path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, npath);
- image = loadPhase4(npath, orgPath, context, cacheIndex, exceptions);
- // Look in the cache if appropriate
- if ( image == NULL)
- image = loadPhase2cache(npath, orgPath, context, cacheIndex, exceptions);
- if ( image != NULL ) {
- // if original path is in the dyld cache, then mark this one found as an override
- dyld3::SharedCacheFindDylibResults shareCacheResults;
- if ( dyld3::findInSharedCacheImage(sSharedCacheLoadInfo, path, &shareCacheResults) && (shareCacheResults.image != nullptr) )
- image->setOverridesCachedDylib(shareCacheResults.image->imageNum());
- return image;
- }
- }
- }
- }
- // <rdar://problem/12649639> An executable with the same name as a framework & DYLD_LIBRARY_PATH pointing to it gets loaded twice
- // <rdar://problem/14160846> Some apps depend on frameworks being found via library paths
- if ( (libraryPaths != NULL) && ((frameworkPartialPath == NULL) || sFrameworksFoundAsDylibs) ) {
- const char* libraryLeafName = getLibraryLeafName(path);
- const size_t libraryLeafNameLen = strlen(libraryLeafName);
- for(const char* const* lp = libraryPaths; *lp != NULL; ++lp) {
- char libpath[strlen(*lp)+libraryLeafNameLen+8];
- strcpy(libpath, *lp);
- strcat(libpath, "/");
- strcat(libpath, libraryLeafName);
- //dyld::log("dyld: fallback library path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, libpath);
- image = loadPhase4(libpath, orgPath, context, cacheIndex, exceptions);
- // Look in the cache if appropriate
- if ( image == NULL)
- image = loadPhase2cache(libpath, orgPath, context, cacheIndex, exceptions);
- if ( image != NULL ) {
- // if original path is in the dyld cache, then mark this one found as an override
- dyld3::SharedCacheFindDylibResults shareCacheResults;
- if ( dyld3::findInSharedCacheImage(sSharedCacheLoadInfo, path, &shareCacheResults) && (shareCacheResults.image != nullptr) )
- image->setOverridesCachedDylib(shareCacheResults.image->imageNum());
- return image;
- }
- }
- }
- return NULL;
-}
-
-// try search overrides and fallbacks
-static ImageLoader* loadPhase1(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
- ImageLoader* image = NULL;
-
- // handle LD_LIBRARY_PATH environment variables that force searching
- if ( context.useLdLibraryPath && (sEnv.LD_LIBRARY_PATH != NULL) ) {
- image = loadPhase2(path, orgPath, context, NULL, sEnv.LD_LIBRARY_PATH, cacheIndex,exceptions);
- if ( image != NULL )
- return image;
- }
-
- // handle DYLD_ environment variables that force searching
- if ( context.useSearchPaths && ((sEnv.DYLD_FRAMEWORK_PATH != NULL) || (sEnv.DYLD_LIBRARY_PATH != NULL)) ) {
- image = loadPhase2(path, orgPath, context, sEnv.DYLD_FRAMEWORK_PATH, sEnv.DYLD_LIBRARY_PATH, cacheIndex, exceptions);
- if ( image != NULL )
- return image;
- }
-
- // try raw path
- image = loadPhase3(path, orgPath, context, cacheIndex, exceptions);
- if ( image != NULL )
- return image;
-
- // try fallback paths during second time (will open file)
- const char* const* fallbackLibraryPaths = sEnv.DYLD_FALLBACK_LIBRARY_PATH;
- if ( (fallbackLibraryPaths != NULL) && !context.useFallbackPaths )
- fallbackLibraryPaths = NULL;
- if ( !context.dontLoad && (exceptions != NULL) && ((sEnv.DYLD_FALLBACK_FRAMEWORK_PATH != NULL) || (fallbackLibraryPaths != NULL)) ) {
- image = loadPhase2(path, orgPath, context, sEnv.DYLD_FALLBACK_FRAMEWORK_PATH, fallbackLibraryPaths, cacheIndex, exceptions);
- if ( image != NULL )
- return image;
- }
-
- return NULL;
-}
-
-// try root substitutions
-static ImageLoader* loadPhase0(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // handle macOS dylibs dlopen()ing versioned path which needs to map to flat path in mazipan simulator
- if ( gLinkContext.marzipan && strstr(path, ".framework/Versions/")) {
- uintptr_t sourceOffset = 0;
- uintptr_t destOffset = 0;
- size_t sourceLangth = strlen(path);
- char flatPath[sourceLangth];
- flatPath[0] = 0;
- const char* frameworkBase = NULL;
- while ((frameworkBase = strstr(&path[sourceOffset], ".framework/Versions/"))) {
- uintptr_t foundLength = (frameworkBase - &path[sourceOffset]) + strlen(".framework/") ;
- strlcat(&flatPath[destOffset], &path[sourceOffset], foundLength);
- sourceOffset += foundLength + strlen("Versions/") + 1;
- destOffset += foundLength - 1;
- }
- strlcat(&flatPath[destOffset], &path[sourceOffset], sourceLangth);
- ImageLoader* image = loadPhase0(flatPath, orgPath, context, cacheIndex, exceptions);
- if ( image != NULL )
- return image;
- }
-#endif
-
-#if SUPPORT_ROOT_PATH
- // handle DYLD_ROOT_PATH which forces absolute paths to use a new root
- if ( (gLinkContext.rootPaths != NULL) && (path[0] == '/') ) {
- for(const char* const* rootPath = gLinkContext.rootPaths; *rootPath != NULL; ++rootPath) {
- size_t rootLen = strlen(*rootPath);
- if ( strncmp(path, *rootPath, rootLen) != 0 ) {
- char newPath[rootLen + strlen(path)+2];
- strcpy(newPath, *rootPath);
- strcat(newPath, path);
- ImageLoader* image = loadPhase1(newPath, orgPath, context, cacheIndex, exceptions);
- if ( image != NULL )
- return image;
- }
- }
- }
-#endif
-
- // try raw path
- return loadPhase1(path, orgPath, context, cacheIndex, exceptions);
-}
-
-static bool cacheablePath(const char* path) {
- if (strncmp(path, "/usr/lib/", 9) == 0)
- return true;
- if (strncmp(path, "/System/Library/", 16) == 0)
- return true;
- return false;
-}
-
-//
-// Given all the DYLD_ environment variables, the general case for loading libraries
-// is that any given path expands into a list of possible locations to load. We
-// also must take care to ensure two copies of the "same" library are never loaded.
-//
-// The algorithm used here is that there is a separate function for each "phase" of the
-// path expansion. Each phase function calls the next phase with each possible expansion
-// of that phase. The result is the last phase is called with all possible paths.
-//
-// To catch duplicates the algorithm is run twice. The first time, the last phase checks
-// the path against all loaded images. The second time, the last phase calls open() on
-// the path. Either time, if an image is found, the phases all unwind without checking
-// for other paths.
-//
-ImageLoader* load(const char* path, const LoadContext& context, unsigned& cacheIndex)
-{
- CRSetCrashLogMessage2(path);
- const char* orgPath = path;
- cacheIndex = UINT32_MAX;
-
- //dyld::log("%s(%s)\n", __func__ , path);
- char realPath[PATH_MAX];
- // when DYLD_IMAGE_SUFFIX is in used, do a realpath(), otherwise a load of "Foo.framework/Foo" will not match
- if ( context.useSearchPaths && ( gLinkContext.imageSuffix != NULL && *gLinkContext.imageSuffix != NULL) ) {
- if ( realpath(path, realPath) != NULL )
- path = realPath;
- }
-
- // try all path permutations and check against existing loaded images
-
- ImageLoader* image = loadPhase0(path, orgPath, context, cacheIndex, NULL);
- if ( image != NULL ) {
- CRSetCrashLogMessage2(NULL);
- return image;
- }
-
- // try all path permutations and try open() until first success
- std::vector<const char*> exceptions;
- image = loadPhase0(path, orgPath, context, cacheIndex, &exceptions);
-#if !TARGET_IPHONE_SIMULATOR
- // <rdar://problem/16704628> support symlinks on disk to a path in dyld shared cache
- if ( image == NULL)
- image = loadPhase2cache(path, orgPath, context, cacheIndex, &exceptions);
-#endif
- CRSetCrashLogMessage2(NULL);
- if ( image != NULL ) {
- // <rdar://problem/6916014> leak in dyld during dlopen when using DYLD_ variables
- for (std::vector<const char*>::iterator it = exceptions.begin(); it != exceptions.end(); ++it) {
- free((void*)(*it));
- }
- // if loaded image is not from cache, but original path is in cache
- // set gSharedCacheOverridden flag to disable some ObjC optimizations
- if ( !gSharedCacheOverridden && !image->inSharedCache() && image->isDylib() && cacheablePath(path) && inSharedCache(path) ) {
- gSharedCacheOverridden = true;
- }
- return image;
- }
- else if ( exceptions.size() == 0 ) {
- if ( context.dontLoad ) {
- return NULL;
- }
- else
- throw "image not found";
- }
- else {
- const char* msgStart = "no suitable image found. Did find:";
- const char* delim = "\n\t";
- size_t allsizes = strlen(msgStart)+8;
- for (size_t i=0; i < exceptions.size(); ++i)
- allsizes += (strlen(exceptions[i]) + strlen(delim));
- char* fullMsg = new char[allsizes];
- strcpy(fullMsg, msgStart);
- for (size_t i=0; i < exceptions.size(); ++i) {
- strcat(fullMsg, delim);
- strcat(fullMsg, exceptions[i]);
- free((void*)exceptions[i]);
- }
- throw (const char*)fullMsg;
- }
-}
-
-
-
-
-
-static void mapSharedCache()
-{
- dyld3::SharedCacheOptions opts;
- opts.cacheDirOverride = sSharedCacheOverrideDir;
- opts.forcePrivate = (gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion);
-
-
-#if __x86_64__ && !TARGET_IPHONE_SIMULATOR
- opts.useHaswell = sHaswell;
-#else
- opts.useHaswell = false;
-#endif
- opts.verbose = gLinkContext.verboseMapping;
- loadDyldCache(opts, &sSharedCacheLoadInfo);
-
- // update global state
- if ( sSharedCacheLoadInfo.loadAddress != nullptr ) {
- gLinkContext.dyldCache = sSharedCacheLoadInfo.loadAddress;
- dyld::gProcessInfo->processDetachedFromSharedRegion = opts.forcePrivate;
- dyld::gProcessInfo->sharedCacheSlide = sSharedCacheLoadInfo.slide;
- dyld::gProcessInfo->sharedCacheBaseAddress = (unsigned long)sSharedCacheLoadInfo.loadAddress;
- sSharedCacheLoadInfo.loadAddress->getUUID(dyld::gProcessInfo->sharedCacheUUID);
- dyld3::kdebug_trace_dyld_image(DBG_DYLD_UUID_SHARED_CACHE_A, (const uuid_t *)&dyld::gProcessInfo->sharedCacheUUID[0], {0,0}, {{ 0, 0 }}, (const mach_header *)sSharedCacheLoadInfo.loadAddress);
- }
-
-//#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
-// RAM disk booting does not have shared cache yet
-// Don't make lack of a shared cache fatal in that case
-// if ( sSharedCacheLoadInfo.loadAddress == nullptr ) {
-// if ( sSharedCacheLoadInfo.errorMessage != nullptr )
-// halt(sSharedCacheLoadInfo.errorMessage);
-// else
-// halt("error loading dyld shared cache");
-// }
-//#endif
-}
-
-
-
-// create when NSLinkModule is called for a second time on a bundle
-ImageLoader* cloneImage(ImageLoader* image)
-{
- // open file (automagically closed when this function exits)
- FileOpener file(image->getPath());
-
- struct stat stat_buf;
- if ( fstat(file.getFileDescriptor(), &stat_buf) == -1)
- throw "stat error";
-
- dyld::LoadContext context;
- context.useSearchPaths = false;
- context.useFallbackPaths = false;
- context.useLdLibraryPath = false;
- context.implicitRPath = false;
- context.matchByInstallName = false;
- context.dontLoad = false;
- context.mustBeBundle = true;
- context.mustBeDylib = false;
- context.canBePIE = false;
- context.enforceIOSMac = false;
- context.origin = NULL;
- context.rpath = NULL;
- return loadPhase6(file.getFileDescriptor(), stat_buf, image->getPath(), context);
-}
-
-
-ImageLoader* loadFromMemory(const uint8_t* mem, uint64_t len, const char* moduleName)
-{
- // if fat wrapper, find usable sub-file
- const fat_header* memStartAsFat = (fat_header*)mem;
- uint64_t fileOffset = 0;
- uint64_t fileLength = len;
- if ( memStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
- if ( fatFindBest(memStartAsFat, &fileOffset, &fileLength) ) {
- mem = &mem[fileOffset];
- len = fileLength;
- }
- else {
- throw "no matching architecture in universal wrapper";
- }
- }
-
- // try each loader
- if ( isCompatibleMachO(mem, moduleName) ) {
- ImageLoader* image = ImageLoaderMachO::instantiateFromMemory(moduleName, (macho_header*)mem, len, gLinkContext);
- // don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
- if ( ! image->isBundle() )
- addImage(image);
- return image;
- }
-
- // try other file formats here...
-
- // throw error about what was found
- switch (*(uint32_t*)mem) {
- case MH_MAGIC:
- case MH_CIGAM:
- case MH_MAGIC_64:
- case MH_CIGAM_64:
- throw "mach-o, but wrong architecture";
- default:
- throwf("unknown file type, first eight bytes: 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
- mem[0], mem[1], mem[2], mem[3], mem[4], mem[5], mem[6],mem[7]);
- }
-}
-
-
-void registerAddCallback(ImageCallback func)
-{
- // now add to list to get notified when any more images are added
- sAddImageCallbacks.push_back(func);
-
- // call callback with all existing images
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( image->getState() >= dyld_image_state_bound && image->getState() < dyld_image_state_terminated ) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_FUNC_FOR_ADD_IMAGE, (uint64_t)image->machHeader(), (uint64_t)(*func), 0);
- (*func)(image->machHeader(), image->getSlide());
- }
- }
-#if SUPPORT_ACCELERATE_TABLES
- if ( sAllCacheImagesProxy != NULL ) {
- dyld_image_info infos[allImagesCount()+1];
- unsigned cacheCount = sAllCacheImagesProxy->appendImagesToNotify(dyld_image_state_bound, true, infos);
- for (unsigned i=0; i < cacheCount; ++i) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_FUNC_FOR_ADD_IMAGE, (uint64_t)infos[i].imageLoadAddress, (uint64_t)(*func), 0);
- (*func)(infos[i].imageLoadAddress, sSharedCacheLoadInfo.slide);
- }
- }
-#endif
-}
-
-void registerLoadCallback(LoadImageCallback func)
-{
- // now add to list to get notified when any more images are added
- sAddLoadImageCallbacks.push_back(func);
-
- // call callback with all existing images
- for (ImageLoader* image : sAllImages) {
- if ( image->getState() >= dyld_image_state_bound && image->getState() < dyld_image_state_terminated ) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_FUNC_FOR_ADD_IMAGE, (uint64_t)image->machHeader(), (uint64_t)(*func), 0);
- (*func)(image->machHeader(), image->getPath(), !image->neverUnload());
- }
- }
-#if SUPPORT_ACCELERATE_TABLES
- if ( sAllCacheImagesProxy != NULL ) {
- dyld_image_info infos[allImagesCount()+1];
- unsigned cacheCount = sAllCacheImagesProxy->appendImagesToNotify(dyld_image_state_bound, true, infos);
- for (unsigned i=0; i < cacheCount; ++i) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_FUNC_FOR_ADD_IMAGE, (uint64_t)infos[i].imageLoadAddress, (uint64_t)(*func), 0);
- (*func)(infos[i].imageLoadAddress, infos[i].imageFilePath, false);
- }
- }
-#endif
-}
-
-void registerRemoveCallback(ImageCallback func)
-{
- // <rdar://problem/15025198> ignore calls to register a notification during a notification
- if ( sRemoveImageCallbacksInUse )
- return;
- sRemoveImageCallbacks.push_back(func);
-}
-
-void clearErrorMessage()
-{
- error_string[0] = '\0';
-}
-
-void setErrorMessage(const char* message)
-{
- // save off error message in global buffer for CrashReporter to find
- strlcpy(error_string, message, sizeof(error_string));
-}
-
-const char* getErrorMessage()
-{
- return error_string;
-}
-
-void halt(const char* message)
-{
- dyld::log("dyld: %s\n", message);
- setErrorMessage(message);
- dyld::gProcessInfo->errorMessage = error_string;
- if ( !gLinkContext.startedInitializingMainExecutable )
- dyld::gProcessInfo->terminationFlags = 1;
- else
- dyld::gProcessInfo->terminationFlags = 0;
-
- char payloadBuffer[EXIT_REASON_PAYLOAD_MAX_LEN];
- dyld_abort_payload* payload = (dyld_abort_payload*)payloadBuffer;
- payload->version = 1;
- payload->flags = gLinkContext.startedInitializingMainExecutable ? 0 : 1;
- payload->targetDylibPathOffset = 0;
- payload->clientPathOffset = 0;
- payload->symbolOffset = 0;
- int payloadSize = sizeof(dyld_abort_payload);
-
- if ( dyld::gProcessInfo->errorTargetDylibPath != NULL ) {
- payload->targetDylibPathOffset = payloadSize;
- payloadSize += strlcpy(&payloadBuffer[payloadSize], dyld::gProcessInfo->errorTargetDylibPath, sizeof(payloadBuffer)-payloadSize) + 1;
- }
- if ( dyld::gProcessInfo->errorClientOfDylibPath != NULL ) {
- payload->clientPathOffset = payloadSize;
- payloadSize += strlcpy(&payloadBuffer[payloadSize], dyld::gProcessInfo->errorClientOfDylibPath, sizeof(payloadBuffer)-payloadSize) + 1;
- }
- if ( dyld::gProcessInfo->errorSymbol != NULL ) {
- payload->symbolOffset = payloadSize;
- payloadSize += strlcpy(&payloadBuffer[payloadSize], dyld::gProcessInfo->errorSymbol, sizeof(payloadBuffer)-payloadSize) + 1;
- }
- char truncMessage[EXIT_REASON_USER_DESC_MAX_LEN];
- strlcpy(truncMessage, message, EXIT_REASON_USER_DESC_MAX_LEN);
- abort_with_payload(OS_REASON_DYLD, dyld::gProcessInfo->errorKind ? dyld::gProcessInfo->errorKind : DYLD_EXIT_REASON_OTHER, payloadBuffer, payloadSize, truncMessage, 0);
-}
-
-static void setErrorStrings(unsigned errorCode, const char* errorClientOfDylibPath,
- const char* errorTargetDylibPath, const char* errorSymbol)
-{
- dyld::gProcessInfo->errorKind = errorCode;
- dyld::gProcessInfo->errorClientOfDylibPath = errorClientOfDylibPath;
- dyld::gProcessInfo->errorTargetDylibPath = errorTargetDylibPath;
- dyld::gProcessInfo->errorSymbol = errorSymbol;
-}
-
-
-uintptr_t bindLazySymbol(const mach_header* mh, uintptr_t* lazyPointer)
-{
- uintptr_t result = 0;
- // acquire read-lock on dyld's data structures
-#if 0 // rdar://problem/3811777 turn off locking until deadlock is resolved
- if ( gLibSystemHelpers != NULL )
- (*gLibSystemHelpers->lockForReading)();
-#endif
- // lookup and bind lazy pointer and get target address
- try {
- ImageLoader* target;
- #if __i386__
- // fast stubs pass NULL for mh and image is instead found via the location of stub (aka lazyPointer)
- if ( mh == NULL )
- target = dyld::findImageContainingAddress(lazyPointer);
- else
- target = dyld::findImageByMachHeader(mh);
- #else
- // note, target should always be mach-o, because only mach-o lazy handler wired up to this
- target = dyld::findImageByMachHeader(mh);
- #endif
- if ( target == NULL )
- throwf("image not found for lazy pointer at %p", lazyPointer);
- result = target->doBindLazySymbol(lazyPointer, gLinkContext);
- }
- catch (const char* message) {
- dyld::log("dyld: lazy symbol binding failed: %s\n", message);
- halt(message);
- }
- // release read-lock on dyld's data structures
-#if 0
- if ( gLibSystemHelpers != NULL )
- (*gLibSystemHelpers->unlockForReading)();
-#endif
- // return target address to glue which jumps to it with real parameters restored
- return result;
-}
-
-
-uintptr_t fastBindLazySymbol(ImageLoader** imageLoaderCache, uintptr_t lazyBindingInfoOffset)
-{
- uintptr_t result = 0;
- // get image
- if ( *imageLoaderCache == NULL ) {
- // save in cache
- *imageLoaderCache = dyld::findMappedRange((uintptr_t)imageLoaderCache);
- if ( *imageLoaderCache == NULL ) {
-#if SUPPORT_ACCELERATE_TABLES
- if ( sAllCacheImagesProxy != NULL ) {
- const mach_header* mh;
- const char* path;
- unsigned index;
- if ( sAllCacheImagesProxy->addressInCache(imageLoaderCache, &mh, &path, &index) ) {
- result = sAllCacheImagesProxy->bindLazy(lazyBindingInfoOffset, gLinkContext, mh, index);
- if ( result == 0 ) {
- halt("dyld: lazy symbol binding failed for image in dyld shared\n");
- }
- return result;
- }
- }
-#endif
- const char* message = "fast lazy binding from unknown image";
- dyld::log("dyld: %s\n", message);
- halt(message);
- }
- }
-
- // bind lazy pointer and return it
- try {
- result = (*imageLoaderCache)->doBindFastLazySymbol((uint32_t)lazyBindingInfoOffset, gLinkContext,
- (dyld::gLibSystemHelpers != NULL) ? dyld::gLibSystemHelpers->acquireGlobalDyldLock : NULL,
- (dyld::gLibSystemHelpers != NULL) ? dyld::gLibSystemHelpers->releaseGlobalDyldLock : NULL);
- }
- catch (const char* message) {
- dyld::log("dyld: lazy symbol binding failed: %s\n", message);
- halt(message);
- }
-
- // return target address to glue which jumps to it with real parameters restored
- return result;
-}
-
-
-
-void registerUndefinedHandler(UndefinedHandler handler)
-{
- sUndefinedHandler = handler;
-}
-
-static void undefinedHandler(const char* symboName)
-{
- if ( sUndefinedHandler != NULL ) {
- (*sUndefinedHandler)(symboName);
- }
-}
-
-static bool findExportedSymbol(const char* name, bool onlyInCoalesced, const ImageLoader::Symbol** sym, const ImageLoader** image, ImageLoader::CoalesceNotifier notifier=NULL)
-{
- // search all images in order
- const ImageLoader* firstWeakImage = NULL;
- const ImageLoader::Symbol* firstWeakSym = NULL;
- const ImageLoader* firstNonWeakImage = NULL;
- const ImageLoader::Symbol* firstNonWeakSym = NULL;
- const size_t imageCount = sAllImages.size();
- for(size_t i=0; i < imageCount; ++i) {
- ImageLoader* anImage = sAllImages[i];
- // the use of inserted libraries alters search order
- // so that inserted libraries are found before the main executable
- if ( sInsertedDylibCount > 0 ) {
- if ( i < sInsertedDylibCount )
- anImage = sAllImages[i+1];
- else if ( i == sInsertedDylibCount )
- anImage = sAllImages[0];
- }
- //dyld::log("findExportedSymbol(%s) looking at %s\n", name, anImage->getPath());
- if ( ! anImage->hasHiddenExports() && (!onlyInCoalesced || anImage->hasCoalescedExports()) ) {
- const ImageLoader* foundInImage;
- *sym = anImage->findExportedSymbol(name, false, &foundInImage);
- //dyld::log("findExportedSymbol(%s) found: sym=%p, anImage=%p, foundInImage=%p\n", name, *sym, anImage, foundInImage /*, (foundInImage ? foundInImage->getPath() : "")*/);
- if ( *sym != NULL ) {
- if ( notifier && (foundInImage == anImage) )
- notifier(*sym, foundInImage, foundInImage->machHeader());
- // if weak definition found, record first one found
- if ( (foundInImage->getExportedSymbolInfo(*sym) & ImageLoader::kWeakDefinition) != 0 ) {
- if ( firstWeakImage == NULL ) {
- firstWeakImage = foundInImage;
- firstWeakSym = *sym;
- }
- }
- else {
- // found non-weak
- if ( !onlyInCoalesced ) {
- // for flat lookups, return first found
- *image = foundInImage;
- return true;
- }
- if ( firstNonWeakImage == NULL ) {
- firstNonWeakImage = foundInImage;
- firstNonWeakSym = *sym;
- }
- }
- }
- }
- }
- if ( firstNonWeakImage != NULL ) {
- // found a weak definition, but no non-weak, so return first weak found
- *sym = firstNonWeakSym;
- *image = firstNonWeakImage;
- return true;
- }
- if ( firstWeakSym != NULL ) {
- // found a weak definition, but no non-weak, so return first weak found
- *sym = firstWeakSym;
- *image = firstWeakImage;
- return true;
- }
-#if SUPPORT_ACCELERATE_TABLES
- if ( sAllCacheImagesProxy != NULL ) {
- if ( sAllCacheImagesProxy->flatFindSymbol(name, onlyInCoalesced, sym, image, notifier) )
- return true;
- }
-#endif
-
- return false;
-}
-
-bool flatFindExportedSymbol(const char* name, const ImageLoader::Symbol** sym, const ImageLoader** image)
-{
- return findExportedSymbol(name, false, sym, image);
-}
-
-bool findCoalescedExportedSymbol(const char* name, const ImageLoader::Symbol** sym, const ImageLoader** image, ImageLoader::CoalesceNotifier notifier)
-{
- return findExportedSymbol(name, true, sym, image, notifier);
-}
-
-
-bool flatFindExportedSymbolWithHint(const char* name, const char* librarySubstring, const ImageLoader::Symbol** sym, const ImageLoader** image)
-{
- // search all images in order
- const size_t imageCount = sAllImages.size();
- for(size_t i=0; i < imageCount; ++i){
- ImageLoader* anImage = sAllImages[i];
- // only look at images whose paths contain the hint string (NULL hint string is wildcard)
- if ( ! anImage->isBundle() && ((librarySubstring==NULL) || (strstr(anImage->getPath(), librarySubstring) != NULL)) ) {
- *sym = anImage->findExportedSymbol(name, false, image);
- if ( *sym != NULL ) {
- return true;
- }
- }
- }
- return false;
-}
-
-
-unsigned int getCoalescedImages(ImageLoader* images[], unsigned imageIndex[])
-{
- unsigned int count = 0;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( image->participatesInCoalescing() ) {
- images[count] = *it;
- imageIndex[count] = 0;
- ++count;
- }
- }
-#if SUPPORT_ACCELERATE_TABLES
- if ( sAllCacheImagesProxy != NULL ) {
- sAllCacheImagesProxy->appendImagesNeedingCoalescing(images, imageIndex, count);
- }
-#endif
- return count;
-}
-
-
-static ImageLoader::MappedRegion* getMappedRegions(ImageLoader::MappedRegion* regions)
-{
- ImageLoader::MappedRegion* end = regions;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- (*it)->getMappedRegions(end);
- }
- return end;
-}
-
-void registerImageStateSingleChangeHandler(dyld_image_states state, dyld_image_state_change_handler handler)
-{
- // mark the image that the handler is in as never-unload because dyld has a reference into it
- ImageLoader* handlerImage = findImageContainingAddress((void*)handler);
- if ( handlerImage != NULL )
- handlerImage->setNeverUnload();
-
- // add to list of handlers
- std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sSingleHandlers);
- if ( handlers != NULL ) {
- // <rdar://problem/10332417> need updateAllImages() to be last in dyld_image_state_mapped list
- // so that if ObjC adds a handler that prevents a load, it happens before the gdb list is updated
- if ( state == dyld_image_state_mapped )
- handlers->insert(handlers->begin(), handler);
- else
- handlers->push_back(handler);
-
- // call callback with all existing images
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- dyld_image_info info;
- info.imageLoadAddress = image->machHeader();
- info.imageFilePath = image->getRealPath();
- info.imageFileModDate = image->lastModified();
- // should only call handler if state == image->state
- if ( image->getState() == state )
- (*handler)(state, 1, &info);
- // ignore returned string, too late to do anything
- }
- }
-}
-
-void registerImageStateBatchChangeHandler(dyld_image_states state, dyld_image_state_change_handler handler)
-{
- // mark the image that the handler is in as never-unload because dyld has a reference into it
- ImageLoader* handlerImage = findImageContainingAddress((void*)handler);
- if ( handlerImage != NULL )
- handlerImage->setNeverUnload();
-
- // add to list of handlers
- std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sBatchHandlers);
- if ( handlers != NULL ) {
- // insert at front, so that gdb handler is always last
- handlers->insert(handlers->begin(), handler);
-
- // call callback with all existing images
- try {
- notifyBatchPartial(state, true, handler, false, false);
- }
- catch (const char* msg) {
- // ignore request to abort during registration
- }
- }
-}
-
-
-void registerObjCNotifiers(_dyld_objc_notify_mapped mapped, _dyld_objc_notify_init init, _dyld_objc_notify_unmapped unmapped)
-{
- // record functions to call
- sNotifyObjCMapped = mapped;
- sNotifyObjCInit = init;
- sNotifyObjCUnmapped = unmapped;
-
- // call 'mapped' function with all images mapped so far
- try {
- notifyBatchPartial(dyld_image_state_bound, true, NULL, false, true);
- }
- catch (const char* msg) {
- // ignore request to abort during registration
- }
-
- // <rdar://problem/32209809> call 'init' function on all images already init'ed (below libSystem)
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( (image->getState() == dyld_image_state_initialized) && image->notifyObjC() ) {
- dyld3::ScopedTimer timer(DBG_DYLD_TIMING_OBJC_INIT, (uint64_t)image->machHeader(), 0, 0);
- (*sNotifyObjCInit)(image->getRealPath(), image->machHeader());
- }
- }
-}
-
-bool sharedCacheUUID(uuid_t uuid)
-{
- if ( sSharedCacheLoadInfo.loadAddress == nullptr )
- return false;
-
- sSharedCacheLoadInfo.loadAddress->getUUID(uuid);
- return true;
-}
-
-#if SUPPORT_ACCELERATE_TABLES
-
-bool dlopenFromCache(const char* path, int mode, void** handle)
-{
- if ( sAllCacheImagesProxy == NULL )
- return false;
- char fallbackPath[PATH_MAX];
- bool result = sAllCacheImagesProxy->dlopenFromCache(gLinkContext, path, mode, handle);
- if ( !result && (strchr(path, '/') == NULL) ) {
- // POSIX says you can call dlopen() with a leaf name (e.g. dlopen("libz.dylb"))
- strcpy(fallbackPath, "/usr/lib/");
- strlcat(fallbackPath, path, PATH_MAX);
- result = sAllCacheImagesProxy->dlopenFromCache(gLinkContext, fallbackPath, mode, handle);
- if ( !result )
- path = fallbackPath;
- }
- if ( !result ) {
- // leaf name could be a symlink
- char resolvedPath[PATH_MAX];
- realpath(path, resolvedPath);
- int realpathErrno = errno;
- // If realpath() resolves to a path which does not exist on disk, errno is set to ENOENT
- if ( (realpathErrno == ENOENT) || (realpathErrno == 0) ) {
- result = sAllCacheImagesProxy->dlopenFromCache(gLinkContext, resolvedPath, mode, handle);
- }
- }
-
- return result;
-}
-
-bool makeCacheHandle(ImageLoader* image, unsigned cacheIndex, int mode, void** result)
-{
- if ( sAllCacheImagesProxy == NULL )
- return false;
- return sAllCacheImagesProxy->makeCacheHandle(gLinkContext, cacheIndex, mode, result);
-}
-
-bool isCacheHandle(void* handle)
-{
- if ( sAllCacheImagesProxy == NULL )
- return false;
- return sAllCacheImagesProxy->isCacheHandle(handle, NULL, NULL);
-}
-
-bool isPathInCache(const char* path)
-{
- if ( sAllCacheImagesProxy == NULL )
- return false;
- unsigned index;
- return sAllCacheImagesProxy->hasDylib(path, &index);
-}
-
-const char* getPathFromIndex(unsigned cacheIndex)
-{
- if ( sAllCacheImagesProxy == NULL )
- return NULL;
- return sAllCacheImagesProxy->getIndexedPath(cacheIndex);
-}
-
-void* dlsymFromCache(void* handle, const char* symName, unsigned index)
-{
- if ( sAllCacheImagesProxy == NULL )
- return NULL;
- return sAllCacheImagesProxy->dlsymFromCache(gLinkContext, handle, symName, index);
-}
-
-bool addressInCache(const void* address, const mach_header** mh, const char** path, unsigned* index)
-{
- if ( sAllCacheImagesProxy == NULL )
- return false;
- unsigned ignore;
- return sAllCacheImagesProxy->addressInCache(address, mh, path, index ? index : &ignore);
-}
-
-bool findUnwindSections(const void* addr, dyld_unwind_sections* info)
-{
- if ( sAllCacheImagesProxy == NULL )
- return false;
- return sAllCacheImagesProxy->findUnwindSections(addr, info);
-}
-
-bool dladdrFromCache(const void* address, Dl_info* info)
-{
- if ( sAllCacheImagesProxy == NULL )
- return false;
- return sAllCacheImagesProxy->dladdrFromCache(address, info);
-}
-#endif
-
-static ImageLoader* libraryLocator(const char* libraryName, bool search, const char* origin, const ImageLoader::RPathChain* rpaths, bool enforceIOSMac, unsigned& cacheIndex)
-{
- dyld::LoadContext context;
- context.useSearchPaths = search;
- context.useFallbackPaths = search;
- context.useLdLibraryPath = false;
- context.implicitRPath = false;
- context.matchByInstallName = false;
- context.dontLoad = false;
- context.mustBeBundle = false;
- context.mustBeDylib = true;
- context.canBePIE = false;
- context.enforceIOSMac = enforceIOSMac;
- context.origin = origin;
- context.rpath = rpaths;
- return load(libraryName, context, cacheIndex);
-}
-
-static const char* basename(const char* path)
-{
- const char* last = path;
- for (const char* s = path; *s != '\0'; s++) {
- if (*s == '/')
- last = s+1;
- }
- return last;
-}
-
-static void setContext(const macho_header* mainExecutableMH, int argc, const char* argv[], const char* envp[], const char* apple[])
-{
- gLinkContext.loadLibrary = &libraryLocator;
- gLinkContext.terminationRecorder = &terminationRecorder;
- gLinkContext.flatExportFinder = &flatFindExportedSymbol;
- gLinkContext.coalescedExportFinder = &findCoalescedExportedSymbol;
- gLinkContext.getCoalescedImages = &getCoalescedImages;
- gLinkContext.undefinedHandler = &undefinedHandler;
- gLinkContext.getAllMappedRegions = &getMappedRegions;
- gLinkContext.bindingHandler = NULL;
- gLinkContext.notifySingle = ¬ifySingle;
- gLinkContext.notifyBatch = ¬ifyBatch;
- gLinkContext.removeImage = &removeImage;
- gLinkContext.registerDOFs = ®isterDOFs;
- gLinkContext.clearAllDepths = &clearAllDepths;
- gLinkContext.printAllDepths = &printAllDepths;
- gLinkContext.imageCount = &imageCount;
- gLinkContext.setNewProgramVars = &setNewProgramVars;
- gLinkContext.inSharedCache = &inSharedCache;
- gLinkContext.setErrorStrings = &setErrorStrings;
-#if SUPPORT_OLD_CRT_INITIALIZATION
- gLinkContext.setRunInitialzersOldWay= &setRunInitialzersOldWay;
-#endif
- gLinkContext.findImageContainingAddress = &findImageContainingAddress;
- gLinkContext.addDynamicReference = &addDynamicReference;
-#if SUPPORT_ACCELERATE_TABLES
- gLinkContext.notifySingleFromCache = ¬ifySingleFromCache;
- gLinkContext.getPreInitNotifyHandler= &getPreInitNotifyHandler;
- gLinkContext.getBoundBatchHandler = &getBoundBatchHandler;
-#endif
- gLinkContext.bindingOptions = ImageLoader::kBindingNone;
- gLinkContext.argc = argc;
- gLinkContext.argv = argv;
- gLinkContext.envp = envp;
- gLinkContext.apple = apple;
- gLinkContext.progname = (argv[0] != NULL) ? basename(argv[0]) : "";
- gLinkContext.programVars.mh = mainExecutableMH;
- gLinkContext.programVars.NXArgcPtr = &gLinkContext.argc;
- gLinkContext.programVars.NXArgvPtr = &gLinkContext.argv;
- gLinkContext.programVars.environPtr = &gLinkContext.envp;
- gLinkContext.programVars.__prognamePtr=&gLinkContext.progname;
- gLinkContext.mainExecutable = NULL;
- gLinkContext.imageSuffix = NULL;
- gLinkContext.dynamicInterposeArray = NULL;
- gLinkContext.dynamicInterposeCount = 0;
- gLinkContext.prebindUsage = ImageLoader::kUseAllPrebinding;
-#if TARGET_IPHONE_SIMULATOR
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
-#else
- gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
-#endif
-}
-
-
-
-//
-// Look for a special segment in the mach header.
-// Its presences means that the binary wants to have DYLD ignore
-// DYLD_ environment variables.
-//
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-static bool hasRestrictedSegment(const macho_header* mh)
-{
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_SEGMENT_COMMAND:
- {
- const struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
-
- //dyld::log("seg name: %s\n", seg->segname);
- if (strcmp(seg->segname, "__RESTRICT") == 0) {
- const struct macho_section* const sectionsStart = (struct macho_section*)((char*)seg + sizeof(struct macho_segment_command));
- const struct macho_section* const sectionsEnd = §ionsStart[seg->nsects];
- for (const struct macho_section* sect=sectionsStart; sect < sectionsEnd; ++sect) {
- if (strcmp(sect->sectname, "__restrict") == 0)
- return true;
- }
- }
- }
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-
- return false;
-}
-#endif
-
-#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
-static bool isFairPlayEncrypted(const macho_header* mh)
-{
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- if ( cmd->cmd == LC_ENCRYPT_COMMAND ) {
- const encryption_info_command* enc = (encryption_info_command*)cmd;
- return (enc->cryptid != 0);
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-
- return false;
-}
-#endif
-
-#if SUPPORT_VERSIONED_PATHS
-
-static bool readFirstPage(const char* dylibPath, uint8_t firstPage[4096])
-{
- firstPage[0] = 0;
- // open file (automagically closed when this function exits)
- FileOpener file(dylibPath);
-
- if ( file.getFileDescriptor() == -1 )
- return false;
-
- if ( pread(file.getFileDescriptor(), firstPage, 4096, 0) != 4096 )
- return false;
-
- // if fat wrapper, find usable sub-file
- const fat_header* fileStartAsFat = (fat_header*)firstPage;
- if ( fileStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
- uint64_t fileOffset;
- uint64_t fileLength;
- if ( fatFindBest(fileStartAsFat, &fileOffset, &fileLength) ) {
- if ( pread(file.getFileDescriptor(), firstPage, 4096, fileOffset) != 4096 )
- return false;
- }
- else {
- return false;
- }
- }
-
- return true;
-}
-
-//
-// Peeks at a dylib file and returns its current_version and install_name.
-// Returns false on error.
-//
-static bool getDylibVersionAndInstallname(const char* dylibPath, uint32_t* version, char* installName)
-{
- uint8_t firstPage[4096];
- const macho_header* mh = (macho_header*)firstPage;
- if ( !readFirstPage(dylibPath, firstPage) ) {
- // If file cannot be read, check to see if path is in shared cache
- const macho_header* mhInCache;
- const char* pathInCache;
- long slideInCache;
- if ( !findInSharedCacheImage(dylibPath, true, NULL, &mhInCache, &pathInCache, &slideInCache) )
- return false;
- mh = mhInCache;
- }
-
- // check mach-o header
- if ( mh->magic != sMainExecutableMachHeader->magic )
- return false;
- if ( mh->cputype != sMainExecutableMachHeader->cputype )
- return false;
-
- // scan load commands for LC_ID_DYLIB
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* const cmdsReadEnd = (struct load_command*)(((char*)mh)+4096);
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_ID_DYLIB:
- {
- const struct dylib_command* id = (struct dylib_command*)cmd;
- *version = id->dylib.current_version;
- if ( installName != NULL )
- strlcpy(installName, (char *)id + id->dylib.name.offset, PATH_MAX);
- return true;
- }
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- if ( cmd > cmdsReadEnd )
- return false;
- }
-
- return false;
-}
-#endif // SUPPORT_VERSIONED_PATHS
-
-
-#if 0
-static void printAllImages()
-{
- dyld::log("printAllImages()\n");
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- dyld_image_states imageState = image->getState();
- dyld::log(" state=%d, dlopen-count=%d, never-unload=%d, in-use=%d, name=%s\n",
- imageState, image->dlopenCount(), image->neverUnload(), image->isMarkedInUse(), image->getShortName());
- }
-}
-#endif
-
-void link(ImageLoader* image, bool forceLazysBound, bool neverUnload, const ImageLoader::RPathChain& loaderRPaths, unsigned cacheIndex)
-{
- // add to list of known images. This did not happen at creation time for bundles
- if ( image->isBundle() && !image->isLinked() )
- addImage(image);
-
- // we detect root images as those not linked in yet
- if ( !image->isLinked() )
- addRootImage(image);
-
- // process images
- try {
- const char* path = image->getPath();
-#if SUPPORT_ACCELERATE_TABLES
- if ( image == sAllCacheImagesProxy )
- path = sAllCacheImagesProxy->getIndexedPath(cacheIndex);
-#endif
- image->link(gLinkContext, forceLazysBound, false, neverUnload, loaderRPaths, path);
- }
- catch (const char* msg) {
- garbageCollectImages();
- throw;
- }
-}
-
-
-void runInitializers(ImageLoader* image)
-{
- // do bottom up initialization
- ImageLoader::InitializerTimingList initializerTimes[allImagesCount()];
- initializerTimes[0].count = 0;
- image->runInitializers(gLinkContext, initializerTimes[0]);
-}
-
-// This function is called at the end of dlclose() when the reference count goes to zero.
-// The dylib being unloaded may have brought in other dependent dylibs when it was loaded.
-// Those dependent dylibs need to be unloaded, but only if they are not referenced by
-// something else. We use a standard mark and sweep garbage collection.
-//
-// The tricky part is that when a dylib is unloaded it may have a termination function that
-// can run and itself call dlclose() on yet another dylib. The problem is that this
-// sort of gabage collection is not re-entrant. Instead a terminator's call to dlclose()
-// which calls garbageCollectImages() will just set a flag to re-do the garbage collection
-// when the current pass is done.
-//
-// Also note that this is done within the dyld global lock, so it is always single threaded.
-//
-void garbageCollectImages()
-{
- static bool sDoingGC = false;
- static bool sRedo = false;
-
- if ( sDoingGC ) {
- // GC is currently being run, just set a flag to have it run again.
- sRedo = true;
- return;
- }
-
- sDoingGC = true;
- do {
- sRedo = false;
-
- // mark phase: mark all images not-in-use
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- //dyld::log("gc: neverUnload=%d name=%s\n", image->neverUnload(), image->getShortName());
- image->markNotUsed();
- }
-
- // sweep phase: mark as in-use, images reachable from never-unload or in-use image
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( (image->dlopenCount() != 0) || image->neverUnload() || (image == sMainExecutable) ) {
- OSSpinLockLock(&sDynamicReferencesLock);
- image->markedUsedRecursive(sDynamicReferences);
- OSSpinLockUnlock(&sDynamicReferencesLock);
- }
- }
-
- // collect phase: build array of images not marked in-use
- ImageLoader* deadImages[sAllImages.size()];
- unsigned deadCount = 0;
- int maxRangeCount = 0;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( ! image->isMarkedInUse() ) {
- deadImages[deadCount++] = image;
- if (gLogAPIs) dyld::log("dlclose(), found unused image %p %s\n", image, image->getShortName());
- maxRangeCount += image->segmentCount();
- }
- }
-
- // collect phase: run termination routines for images not marked in-use
- if ( maxRangeCount != 0 ) {
- __cxa_range_t ranges[maxRangeCount];
- int rangeCount = 0;
- for (unsigned i=0; i < deadCount; ++i) {
- ImageLoader* image = deadImages[i];
- for (unsigned int j=0; j < image->segmentCount(); ++j) {
- if ( !image->segExecutable(j) )
- continue;
- if ( rangeCount < maxRangeCount ) {
- ranges[rangeCount].addr = (const void*)image->segActualLoadAddress(j);
- ranges[rangeCount].length = image->segSize(j);
- ++rangeCount;
- }
- }
- try {
- runImageStaticTerminators(image);
- }
- catch (const char* msg) {
- dyld::warn("problem running terminators for image: %s\n", msg);
- }
- }
-
- // <rdar://problem/14718598> dyld should call __cxa_finalize_ranges()
- if ( (rangeCount > 0) && (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 13) )
- (*gLibSystemHelpers->cxa_finalize_ranges)(ranges, rangeCount);
- }
-
- // collect phase: delete all images which are not marked in-use
- bool mightBeMore;
- do {
- mightBeMore = false;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( ! image->isMarkedInUse() ) {
- try {
- if (gLogAPIs) dyld::log("dlclose(), deleting %p %s\n", image, image->getShortName());
- removeImage(image);
- ImageLoader::deleteImage(image);
- mightBeMore = true;
- break; // interator in invalidated by this removal
- }
- catch (const char* msg) {
- dyld::warn("problem deleting image: %s\n", msg);
- }
- }
- }
- } while ( mightBeMore );
- } while (sRedo);
- sDoingGC = false;
-
- //printAllImages();
-
-}
-
-
-static void preflight_finally(ImageLoader* image)
-{
- if ( image->isBundle() ) {
- removeImageFromAllImages(image->machHeader());
- ImageLoader::deleteImage(image);
- }
- sBundleBeingLoaded = NULL;
- dyld::garbageCollectImages();
-}
-
-
-void preflight(ImageLoader* image, const ImageLoader::RPathChain& loaderRPaths, unsigned cacheIndex)
-{
- try {
- if ( image->isBundle() )
- sBundleBeingLoaded = image; // hack
- const char* path = image->getPath();
-#if SUPPORT_ACCELERATE_TABLES
- if ( image == sAllCacheImagesProxy )
- path = sAllCacheImagesProxy->getIndexedPath(cacheIndex);
-#endif
- image->link(gLinkContext, false, true, false, loaderRPaths, path);
- }
- catch (const char* msg) {
- preflight_finally(image);
- throw;
- }
- preflight_finally(image);
-}
-
-static void loadInsertedDylib(const char* path)
-{
- ImageLoader* image = NULL;
- unsigned cacheIndex;
- try {
- LoadContext context;
- context.useSearchPaths = false;
- context.useFallbackPaths = false;
- context.useLdLibraryPath = false;
- context.implicitRPath = false;
- context.matchByInstallName = false;
- context.dontLoad = false;
- context.mustBeBundle = false;
- context.mustBeDylib = true;
- context.canBePIE = false;
- context.enforceIOSMac = true;
- context.origin = NULL; // can't use @loader_path with DYLD_INSERT_LIBRARIES
- context.rpath = NULL;
- image = load(path, context, cacheIndex);
- }
- catch (const char* msg) {
- if ( gLinkContext.allowInsertFailures )
- dyld::log("dyld: warning: could not load inserted library '%s' into hardened process because %s\n", path, msg);
- else
- halt(dyld::mkstringf("could not load inserted library '%s' because %s\n", path, msg));
- }
- catch (...) {
- halt(dyld::mkstringf("could not load inserted library '%s'\n", path));
- }
-}
-
-
-static void configureProcessRestrictions(const macho_header* mainExecutableMH)
-{
- uint64_t amfiInputFlags = 0;
-#if TARGET_IPHONE_SIMULATOR
- amfiInputFlags |= AMFI_DYLD_INPUT_PROC_IN_SIMULATOR;
-#elif __MAC_OS_X_VERSION_MIN_REQUIRED
- if ( hasRestrictedSegment(mainExecutableMH) )
- amfiInputFlags |= AMFI_DYLD_INPUT_PROC_HAS_RESTRICT_SEG;
-#elif __IPHONE_OS_VERSION_MIN_REQUIRED
- if ( isFairPlayEncrypted(mainExecutableMH) )
- amfiInputFlags |= AMFI_DYLD_INPUT_PROC_IS_ENCRYPTED;
-#endif
- uint64_t amfiOutputFlags = 0;
- if ( amfi_check_dyld_policy_self(amfiInputFlags, &amfiOutputFlags) == 0 ) {
- gLinkContext.allowAtPaths = (amfiOutputFlags & AMFI_DYLD_OUTPUT_ALLOW_AT_PATH);
- gLinkContext.allowEnvVarsPrint = (amfiOutputFlags & AMFI_DYLD_OUTPUT_ALLOW_PRINT_VARS);
- gLinkContext.allowEnvVarsPath = (amfiOutputFlags & AMFI_DYLD_OUTPUT_ALLOW_PATH_VARS);
- gLinkContext.allowEnvVarsSharedCache = (amfiOutputFlags & AMFI_DYLD_OUTPUT_ALLOW_CUSTOM_SHARED_CACHE);
- gLinkContext.allowClassicFallbackPaths = (amfiOutputFlags & AMFI_DYLD_OUTPUT_ALLOW_FALLBACK_PATHS);
- gLinkContext.allowInsertFailures = (amfiOutputFlags & AMFI_DYLD_OUTPUT_ALLOW_FAILED_LIBRARY_INSERTION);
- }
- else {
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // support chrooting from old kernel
- bool isRestricted = false;
- bool libraryValidation = false;
- // any processes with setuid or setgid bit set or with __RESTRICT segment is restricted
- if ( issetugid() || hasRestrictedSegment(mainExecutableMH) ) {
- isRestricted = true;
- }
- bool usingSIP = (csr_check(CSR_ALLOW_TASK_FOR_PID) != 0);
- uint32_t flags;
- if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) != -1 ) {
- // On OS X CS_RESTRICT means the program was signed with entitlements
- if ( ((flags & CS_RESTRICT) == CS_RESTRICT) && usingSIP ) {
- isRestricted = true;
- }
- // Library Validation loosens searching but requires everything to be code signed
- if ( flags & CS_REQUIRE_LV ) {
- isRestricted = false;
- libraryValidation = true;
- }
- }
- gLinkContext.allowAtPaths = !isRestricted;
- gLinkContext.allowEnvVarsPrint = !isRestricted;
- gLinkContext.allowEnvVarsPath = !isRestricted;
- gLinkContext.allowEnvVarsSharedCache = !libraryValidation || !usingSIP;
- gLinkContext.allowClassicFallbackPaths = !isRestricted;
- gLinkContext.allowInsertFailures = false;
-#else
- halt("amfi_check_dyld_policy_self() failed\n");
-#endif
- }
-}
-
-
-bool processIsRestricted()
-{
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- return !gLinkContext.allowEnvVarsPath;
-#else
- return false;
-#endif
-}
-
-
-// <rdar://problem/10583252> Add dyld to uuidArray to enable symbolication of stackshots
-static void addDyldImageToUUIDList()
-{
- const struct macho_header* mh = (macho_header*)&__dso_handle;
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)((char*)mh + sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_UUID: {
- uuid_command* uc = (uuid_command*)cmd;
- dyld_uuid_info info;
- info.imageLoadAddress = (mach_header*)mh;
- memcpy(info.imageUUID, uc->uuid, 16);
- addNonSharedCacheImageUUID(info);
- return;
- }
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-}
-
-void notifyKernelAboutImage(const struct macho_header* mh, const char* fileInfo)
-{
- const char *endptr = nullptr;
- uint64_t fsid_scalar = hexToUInt64(fileInfo, &endptr);
- uint64_t fsobj_id_scalar = 0;
- if (endptr != nullptr) {
- fsobj_id_scalar = hexToUInt64(endptr+1, &endptr);
- }
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)((char*)mh + sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_UUID: {
- // Add dyld to the kernel image info
- uuid_command* uc = (uuid_command*)cmd;
- dyld3::kdebug_trace_dyld_image(DBG_DYLD_UUID_MAP_A, (const uuid_t *)&uc->uuid[0], *reinterpret_cast<fsobj_id_t *>(&fsobj_id_scalar), *reinterpret_cast<fsid_t *>(&fsid_scalar), (const mach_header *)mh);
- return;
- }
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-}
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-typedef int (*open_proc_t)(const char*, int, int);
-typedef int (*fcntl_proc_t)(int, int, void*);
-typedef int (*ioctl_proc_t)(int, unsigned long, void*);
-static void* getProcessInfo() { return dyld::gProcessInfo; }
-static SyscallHelpers sSysCalls = {
- 12,
- // added in version 1
- (open_proc_t)&open,
- &close,
- &pread,
- &write,
- &mmap,
- &munmap,
- &madvise,
- &stat,
- (fcntl_proc_t)&fcntl,
- (ioctl_proc_t)&ioctl,
- &issetugid,
- &getcwd,
- &realpath,
- &vm_allocate,
- &vm_deallocate,
- &vm_protect,
- &vlog,
- &vwarn,
- &pthread_mutex_lock,
- &pthread_mutex_unlock,
- &mach_thread_self,
- &mach_port_deallocate,
- &task_self_trap,
- &mach_timebase_info,
- &OSAtomicCompareAndSwapPtrBarrier,
- &OSMemoryBarrier,
- &getProcessInfo,
- &__error,
- &mach_absolute_time,
- // added in version 2
- &thread_switch,
- // added in version 3
- &opendir,
- &readdir_r,
- &closedir,
- // added in version 4
- &coresymbolication_load_notifier,
- &coresymbolication_unload_notifier,
- // Added in version 5
- &proc_regionfilename,
- &getpid,
- &mach_port_insert_right,
- &mach_port_allocate,
- &mach_msg,
- // Added in version 6
- &abort_with_payload,
- // Added in version 7
- &task_register_dyld_image_infos,
- &task_unregister_dyld_image_infos,
- &task_get_dyld_image_infos,
- &task_register_dyld_shared_cache_image_info,
- &task_register_dyld_set_dyld_state,
- &task_register_dyld_get_process_state,
- // Added in version 8
- &task_info,
- &thread_info,
- &kdebug_is_enabled,
- &kdebug_trace,
- // Added in version 9
- &kdebug_trace_string,
- // Added in version 10
- &amfi_check_dyld_policy_self,
- // Added in version 11
- ¬ifyMonitoringDyldMain,
- ¬ifyMonitoringDyld,
- // Add in version 12
- &mach_msg_destroy,
- &mach_port_construct,
- &mach_port_destruct
-};
-
-__attribute__((noinline))
-static const char* useSimulatorDyld(int fd, const macho_header* mainExecutableMH, const char* dyldPath,
- int argc, const char* argv[], const char* envp[], const char* apple[],
- uintptr_t* startGlue, uintptr_t* mainAddr)
-{
- *startGlue = 0;
- *mainAddr = 0;
-
- // <rdar://35873436> HACK to allow marzipan dyld_sim to run entitled processes
- if ( strncmp(dyldPath, "/System/", 8) != 0 ) {
- uint32_t flags;
- if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) == -1 )
- return "csops() failed";
- if ( (flags & CS_RESTRICT) == CS_RESTRICT )
- return "dyld_sim cannot be loaded in a restricted process";
- }
-
- // <rdar://problem/25311921> simulator does not support restricted processes
- if ( issetugid() )
- return "dyld_sim cannot be loaded in a setuid process";
- if ( hasRestrictedSegment(mainExecutableMH) )
- return "dyld_sim cannot be loaded in a restricted process";
-
- // get file size of dyld_sim
- struct stat sb;
- if ( fstat(fd, &sb) == -1 )
- return "stat(dyld_sim) failed";
-
- // read first page of dyld_sim file
- uint8_t firstPage[4096];
- if ( pread(fd, firstPage, 4096, 0) != 4096 )
- return "pread(dyld_sim) failed";
-
- // if fat file, pick matching slice
- uint64_t fileOffset = 0;
- uint64_t fileLength = sb.st_size;
- const fat_header* fileStartAsFat = (fat_header*)firstPage;
- if ( fileStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
- if ( !fatFindBest(fileStartAsFat, &fileOffset, &fileLength) )
- return "no matching arch in dyld_sim";
- // re-read buffer from start of mach-o slice in fat file
- if ( pread(fd, firstPage, 4096, fileOffset) != 4096 )
- return "pread(dyld_sim) failed";
- }
- else if ( !isCompatibleMachO(firstPage, dyldPath) ) {
- return "dyld_sim is not compatible with the loaded process, likely due to architecture mismatch";
- }
-
- // calculate total size of dyld segments
- const macho_header* mh = (const macho_header*)firstPage;
- struct macho_segment_command* lastSeg = NULL;
- struct macho_segment_command* firstSeg = NULL;
- uintptr_t mappingSize = 0;
- uintptr_t preferredLoadAddress = 0;
- const uint32_t cmd_count = mh->ncmds;
- if ( mh->sizeofcmds > 4096 )
- return "dyld_sim load commands to large";
- if ( (sizeof(macho_header) + mh->sizeofcmds) > 4096 )
- return "dyld_sim load commands to large";
- struct linkedit_data_command* codeSigCmd = NULL;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* const endCmds = (struct load_command*)(((char*)mh) + sizeof(macho_header) + mh->sizeofcmds);
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- uint32_t cmdLength = cmd->cmdsize;
- if ( cmdLength < 8 )
- return "dyld_sim load command too small";
- const struct load_command* const nextCmd = (const struct load_command*)(((char*)cmd)+cmdLength);
- if ( (nextCmd > endCmds) || (nextCmd < cmd) )
- return "dyld_sim load command too large";
- switch (cmd->cmd) {
- case LC_SEGMENT_COMMAND:
- {
- struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
- if ( seg->vmaddr + seg->vmsize < seg->vmaddr )
- return "dyld_sim seg wraps address space";
- if ( seg->vmsize < seg->filesize )
- return "dyld_sim seg vmsize too small";
- if ( (seg->fileoff + seg->filesize) < seg->fileoff )
- return "dyld_sim seg size wraps address space";
- if ( lastSeg == NULL ) {
- // first segment must be __TEXT and start at beginning of file/slice
- firstSeg = seg;
- if ( strcmp(seg->segname, "__TEXT") != 0 )
- return "dyld_sim first segment not __TEXT";
- if ( seg->fileoff != 0 )
- return "dyld_sim first segment not at file offset zero";
- if ( seg->filesize < (sizeof(macho_header) + mh->sizeofcmds) )
- return "dyld_sim first segment smaller than load commands";
- preferredLoadAddress = seg->vmaddr;
- }
- else {
- // other sements must be continguous with previous segment and not executable
- if ( lastSeg->fileoff + lastSeg->filesize != seg->fileoff )
- return "dyld_sim segments not contiguous";
- if ( lastSeg->vmaddr + lastSeg->vmsize != seg->vmaddr )
- return "dyld_sim segments not address contiguous";
- if ( (seg->initprot & VM_PROT_EXECUTE) != 0 )
- return "dyld_sim non-first segment is executable";
- }
- mappingSize += seg->vmsize;
- lastSeg = seg;
- }
- break;
- case LC_SEGMENT_COMMAND_WRONG:
- return "dyld_sim wrong load segment load command";
- case LC_CODE_SIGNATURE:
- codeSigCmd = (struct linkedit_data_command*)cmd;
- break;
- }
- cmd = nextCmd;
- }
- // last segment must be named __LINKEDIT and not writable
- if ( lastSeg == NULL )
- return "dyld_sim has no segments";
- if ( strcmp(lastSeg->segname, "__LINKEDIT") != 0 )
- return "dyld_sim last segment not __LINKEDIT";
- if ( lastSeg->initprot & VM_PROT_WRITE )
- return "dyld_sim __LINKEDIT segment writable";
-
- // must have code signature which is contained within LINKEDIT segment
- if ( codeSigCmd == NULL )
- return "dyld_sim not code signed";
- if ( codeSigCmd->dataoff < lastSeg->fileoff )
- return "dyld_sim code signature not in __LINKEDIT";
- if ( (codeSigCmd->dataoff + codeSigCmd->datasize) < codeSigCmd->dataoff )
- return "dyld_sim code signature size wraps";
- if ( (codeSigCmd->dataoff + codeSigCmd->datasize) > (lastSeg->fileoff + lastSeg->filesize) )
- return "dyld_sim code signature extends beyond __LINKEDIT";
-
- // register code signature with kernel before mmap()ing segments
- fsignatures_t siginfo;
- siginfo.fs_file_start=fileOffset; // start of mach-o slice in fat file
- siginfo.fs_blob_start=(void*)(long)(codeSigCmd->dataoff); // start of code-signature in mach-o file
- siginfo.fs_blob_size=codeSigCmd->datasize; // size of code-signature
- int result = fcntl(fd, F_ADDFILESIGS_FOR_DYLD_SIM, &siginfo);
- if ( result == -1 ) {
- return mkstringf("dyld_sim fcntl(F_ADDFILESIGS_FOR_DYLD_SIM) failed with errno=%d", errno);
- }
- // file range covered by code signature must extend up to code signature itself
- if ( siginfo.fs_file_start < codeSigCmd->dataoff )
- return mkstringf("dyld_sim code signature does not cover all of dyld_sim. Signature covers up to 0x%08lX. Signature starts at 0x%08X", (unsigned long)siginfo.fs_file_start, codeSigCmd->dataoff);
-
- // reserve space, then mmap each segment
- vm_address_t loadAddress = 0;
- if ( ::vm_allocate(mach_task_self(), &loadAddress, mappingSize, VM_FLAGS_ANYWHERE) != 0 )
- return "dyld_sim cannot allocate space";
- cmd = cmds;
- struct source_version_command* dyldVersionCmd = NULL;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_SEGMENT_COMMAND:
- {
- struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
- uintptr_t requestedLoadAddress = seg->vmaddr - preferredLoadAddress + loadAddress;
- void* segAddress = ::mmap((void*)requestedLoadAddress, seg->filesize, seg->initprot, MAP_FIXED | MAP_PRIVATE, fd, fileOffset + seg->fileoff);
- //dyld::log("dyld_sim %s mapped at %p\n", seg->segname, segAddress);
- if ( segAddress == (void*)(-1) )
- return "dyld_sim mmap() of segment failed";
- if ( ((uintptr_t)segAddress < loadAddress) || ((uintptr_t)segAddress+seg->filesize > loadAddress+mappingSize) )
- return "dyld_sim mmap() to wrong location";
- }
- break;
- case LC_SOURCE_VERSION:
- dyldVersionCmd = (struct source_version_command*)cmd;
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
- close(fd);
-
- // walk newly mapped dyld_sim __TEXT load commands to find entry point
- uintptr_t entry = 0;
- cmd = (struct load_command*)(((char*)loadAddress)+sizeof(macho_header));
- const uint32_t count = ((macho_header*)(loadAddress))->ncmds;
- for (uint32_t i = 0; i < count; ++i) {
- if (cmd->cmd == LC_UNIXTHREAD) {
- #if __i386__
- const i386_thread_state_t* registers = (i386_thread_state_t*)(((char*)cmd) + 16);
- // entry point must be in first segment
- if ( registers->__eip < firstSeg->vmaddr )
- return "dyld_sim entry point not in __TEXT segment";
- if ( registers->__eip > (firstSeg->vmaddr + firstSeg->vmsize) )
- return "dyld_sim entry point not in __TEXT segment";
- entry = (registers->__eip + loadAddress - preferredLoadAddress);
- #elif __x86_64__
- const x86_thread_state64_t* registers = (x86_thread_state64_t*)(((char*)cmd) + 16);
- // entry point must be in first segment
- if ( registers->__rip < firstSeg->vmaddr )
- return "dyld_sim entry point not in __TEXT segment";
- if ( registers->__rip > (firstSeg->vmaddr + firstSeg->vmsize) )
- return "dyld_sim entry point not in __TEXT segment";
- entry = (registers->__rip + loadAddress - preferredLoadAddress);
- #endif
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
- if ( entry == 0 )
- return "dyld_sim entry not found";
-
- // notify debugger that dyld_sim is loaded
- dyld_image_info info;
- info.imageLoadAddress = (mach_header*)loadAddress;
- info.imageFilePath = strdup(dyldPath);
- info.imageFileModDate = sb.st_mtime;
- addImagesToAllImages(1, &info);
- dyld::gProcessInfo->notification(dyld_image_adding, 1, &info);
-
- const char** appleParams = apple;
- // jump into new simulator dyld
- typedef uintptr_t (*sim_entry_proc_t)(int argc, const char* argv[], const char* envp[], const char* apple[],
- const macho_header* mainExecutableMH, const macho_header* dyldMH, uintptr_t dyldSlide,
- const dyld::SyscallHelpers* vtable, uintptr_t* startGlue);
- sim_entry_proc_t newDyld = (sim_entry_proc_t)entry;
- *mainAddr = (*newDyld)(argc, argv, envp, appleParams, mainExecutableMH, (macho_header*)loadAddress,
- loadAddress - preferredLoadAddress,
- &sSysCalls, startGlue);
- return NULL;
-}
-#endif
-
-//
-// If the DYLD_SKIP_MAIN environment is set to 1, dyld will return the
-// address of this function instead of main() in the target program which
-// __dyld_start jumps to. Useful for qualifying dyld itself.
-//
-int
-fake_main()
-{
- return 0;
-}
-
-
-
-
-static bool envVarMatches(const dyld3::closure::LaunchClosure* mainClosure, const char* envp[], const char* varName)
-{
- __block const char* valueFromClosure = nullptr;
- mainClosure->forEachEnvVar(^(const char* keyEqualValue, bool& stop) {
- size_t keyLen = strlen(varName);
- if ( (strncmp(varName, keyEqualValue, keyLen) == 0) && (keyEqualValue[keyLen] == '=') ) {
- valueFromClosure = &keyEqualValue[keyLen+1];
- stop = true;
- }
- });
-
- const char* valueFromEnv = _simple_getenv(envp, varName);
-
- bool inClosure = (valueFromClosure != nullptr);
- bool inEnv = (valueFromEnv != nullptr);
- if ( inClosure != inEnv )
- return false;
- if ( !inClosure && !inEnv )
- return true;
- return ( strcmp(valueFromClosure, valueFromEnv) == 0 );
-}
-
-static const char* const sEnvVarsToCheck[] = {
- "DYLD_LIBRARY_PATH",
- "DYLD_FRAMEWORK_PATH",
- "DYLD_FALLBACK_LIBRARY_PATH",
- "DYLD_FALLBACK_FRAMEWORK_PATH",
- "DYLD_INSERT_LIBRARIES",
- "DYLD_IMAGE_SUFFIX",
- "DYLD_VERSIONED_FRAMEWORK_PATH",
- "DYLD_VERSIONED_LIBRARY_PATH",
- "DYLD_ROOT_PATH"
-};
-
-static bool envVarsMatch(const dyld3::closure::LaunchClosure* mainClosure, const char* envp[])
-{
- for (const char* envVar : sEnvVarsToCheck) {
- if ( !envVarMatches(mainClosure, envp, envVar) ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because %s changed\n", mainClosure, envVar);
- return false;
- }
- }
-
- // FIXME: dyld3 doesn't support versioned paths so we need to fall back to dyld2 if we have them.
- // <rdar://problem/37004660> dyld3: support DYLD_VERSIONED_*_PATHs ?
- if ( sEnv.DYLD_VERSIONED_LIBRARY_PATH != nullptr ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because DYLD_VERSIONED_LIBRARY_PATH used\n", mainClosure);
- return false;
- }
- if ( sEnv.DYLD_VERSIONED_FRAMEWORK_PATH != nullptr ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because DYLD_VERSIONED_FRAMEWORK_PATH used\n", mainClosure);
- return false;
- }
-
- return true;
-}
-
-static bool closureValid(const dyld3::closure::LaunchClosure* mainClosure, const dyld3::closure::LoadedFileInfo& mainFileInfo,
- const uint8_t* mainExecutableCDHash, bool closureInCache, const char* envp[])
-{
- if ( !closureInCache ) {
- // verify current dyld cache is same as expected
- uuid_t expectedCacheUUID;
- if ( mainClosure->builtAgainstDyldCache(expectedCacheUUID) ) {
- if ( sSharedCacheLoadInfo.loadAddress == nullptr ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p dyld cache not loaded\n", mainClosure);
- return false;
- }
- else {
- uuid_t actualCacheUUID;
- sSharedCacheLoadInfo.loadAddress->getUUID(actualCacheUUID);
- if ( memcmp(expectedCacheUUID, actualCacheUUID, sizeof(uuid_t)) != 0 ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because built against different dyld cache\n", mainClosure);
- return false;
- }
- }
- }
- else {
- // closure built assume there is no dyld cache
- if ( sSharedCacheLoadInfo.loadAddress != nullptr ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p built expecting no dyld cache\n", mainClosure);
- return false;
- }
- }
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- // verify this closure is not from a previous reboot
- const char* expectedBootUUID = mainClosure->bootUUID();
- char actualBootSessionUUID[256] = { 0 };
- size_t bootSize = sizeof(actualBootSessionUUID);
- bool gotActualBootUUID = (sysctlbyname("kern.bootsessionuuid", actualBootSessionUUID, &bootSize, NULL, 0) == 0);
- if ( !gotActualBootUUID || (expectedBootUUID == nullptr) || (strcmp(expectedBootUUID, actualBootSessionUUID) != 0) ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p built in different boot context\n", mainClosure);
- return false;
- }
-#endif
- }
-
- // verify all mach-o files have not changed since closure was built
- __block bool foundFileThatInvalidatesClosure = false;
- mainClosure->images()->forEachImage(^(const dyld3::closure::Image* image, bool& stop) {
- __block uint64_t expectedInode;
- __block uint64_t expectedMtime;
- if ( image->hasFileModTimeAndInode(expectedInode, expectedMtime) ) {
- struct stat statBuf;
- if ( ::stat(image->path(), &statBuf) == 0 ) {
- if ( (statBuf.st_mtime != expectedMtime) || (statBuf.st_ino != expectedInode) ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because mtime/inode for '%s' has changed since closure was built\n", mainClosure, image->path());
- foundFileThatInvalidatesClosure = true;
- stop = true;
- }
- }
- else {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because '%s' is needed by closure but is missing\n", mainClosure, image->path());
- foundFileThatInvalidatesClosure = true;
- stop = true;
- }
- }
- });
- if ( foundFileThatInvalidatesClosure )
- return false;
-
- // verify cdHash of main executable is same as recorded in closure
- uint8_t expectedHash[20];
- const dyld3::closure::Image* mainImage = mainClosure->images()->imageForNum(mainClosure->topImage());
- if ( mainImage->hasCdHash(expectedHash) ) {
- if ( mainExecutableCDHash == nullptr ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because main executable is not code signed but was expected to be\n", mainClosure);
- return false;
- }
- if ( memcmp(mainExecutableCDHash, expectedHash, 20) != 0 ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because main executable cd-hash changed since closure was built\n", mainClosure);
- return false;
- }
- }
-
- // verify UUID of main executable is same as recorded in closure
- uuid_t expectedUUID;
- bool hasExpect = mainImage->getUuid(expectedUUID);
- uuid_t actualUUID;
- const dyld3::MachOLoaded* mainExecutableMH = (const dyld3::MachOLoaded*)mainFileInfo.fileContent;
- bool hasActual = mainExecutableMH->getUuid(actualUUID);
- if ( hasExpect != hasActual ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because UUID of executable changed since closure was built\n", mainClosure);
- return false;
- }
- if ( hasExpect && hasActual && memcmp(actualUUID, expectedUUID, sizeof(uuid_t)) != 0 ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because UUID of executable changed since closure was built\n", mainClosure);
- return false;
- }
-
- // verify DYLD_* env vars are same as when closure was built
- if ( !envVarsMatch(mainClosure, envp) ) {
- return false;
- }
-
- // verify files that are supposed to be missing actually are missing
- mainClosure->forEachMustBeMissingFile(^(const char* path, bool& stop) {
- struct stat statBuf;
- if ( ::stat(path, &statBuf) == 0 ) {
- stop = true;
- foundFileThatInvalidatesClosure = true;
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because found unexpected file '%s'\n", mainClosure, path);
- }
- });
-
- // verify closure did not require anything unavailable
- if ( mainClosure->usedAtPaths() && !gLinkContext.allowAtPaths ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because is used @paths, but process does not allow that\n", mainClosure);
- return false;
- }
- if ( mainClosure->usedFallbackPaths() && !gLinkContext.allowClassicFallbackPaths ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because is used default fallback paths, but process does not allow that\n", mainClosure);
- return false;
- }
-
- return !foundFileThatInvalidatesClosure;
-}
-
-static bool nolog(const char* format, ...)
-{
- return false;
-}
-
-static bool dolog(const char* format, ...)
-{
- va_list list;
- va_start(list, format);
- vlog(format, list);
- va_end(list);
- return true;
-}
-
-static bool launchWithClosure(const dyld3::closure::LaunchClosure* mainClosure,
- const DyldSharedCache* dyldCache,
- const dyld3::MachOLoaded* mainExecutableMH, uintptr_t mainExecutableSlide,
- int argc, const char* argv[], const char* envp[], const char* apple[],
- uintptr_t* entry, uintptr_t* startGlue)
-{
- // build list of all known ImageArrays (at most three: cached dylibs, other OS dylibs, and main prog)
- STACK_ALLOC_ARRAY(const dyld3::closure::ImageArray*, imagesArrays, 3);
- const dyld3::closure::ImageArray* mainClosureImages = mainClosure->images();
- if ( dyldCache != nullptr ) {
- imagesArrays.push_back(dyldCache->cachedDylibsImageArray());
- if ( auto others = dyldCache->otherOSImageArray() )
- imagesArrays.push_back(others);
- }
- imagesArrays.push_back(mainClosureImages);
-
- // allocate space for Array<LoadedImage>
- STACK_ALLOC_ARRAY(dyld3::LoadedImage, allImages, mainClosure->initialLoadCount());
-
- __block dyld3::Loader loader(allImages, dyldCache, imagesArrays, (gLinkContext.verboseLoading ? &dolog : &nolog),
- (gLinkContext.verboseMapping ? &dolog : &nolog),
- (gLinkContext.verboseBind ? &dolog : &nolog),
- (gLinkContext.verboseDOF ? &dolog : &nolog));
- dyld3::closure::ImageNum mainImageNum = mainClosure->topImage();
- mainClosureImages->forEachImage(^(const dyld3::closure::Image* image, bool& stop) {
- if ( image->imageNum() == mainImageNum ) {
- // add main executable (which is already mapped by kernel) to list
- dyld3::LoadedImage mainLoadedImage = dyld3::LoadedImage::make(image, mainExecutableMH);
- mainLoadedImage.setState(dyld3::LoadedImage::State::mapped);
- mainLoadedImage.markLeaveMapped();
- loader.addImage(mainLoadedImage);
- stop = true;
- }
- else {
- // add inserted library to initial list
- loader.addImage(dyld3::LoadedImage::make(image));
- }
- });
-
- // recursively load all dependents and fill in allImages array
- Diagnostics diag;
- loader.completeAllDependents(diag);
- if ( diag.noError() )
- loader.mapAndFixupAllImages(diag, dyld3::Loader::dtraceUserProbesEnabled());
- if ( diag.hasError() ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: %s\n", diag.errorMessage());
- return false;
- }
-
- //dyld::log("loaded image list:\n");
- //for (const dyld3::LoadedImage& info : allImages) {
- // dyld::log("mh=%p, path=%s\n", info.loadedAddress(), info.image()->path());
- //}
-
- // find libdyld entry
- dyld3::closure::Image::ResolvedSymbolTarget dyldEntry;
- mainClosure->libDyldEntry(dyldEntry);
- const dyld3::LibDyldEntryVector* libDyldEntry = (dyld3::LibDyldEntryVector*)loader.resolveTarget(dyldEntry);
-
- // send info on all images to libdyld.dylb
- libDyldEntry->setVars(mainExecutableMH, argc, argv, envp, apple);
- if ( libDyldEntry->vectorVersion > 4 )
- libDyldEntry->setRestrictions(gLinkContext.allowAtPaths, gLinkContext.allowEnvVarsPath);
- libDyldEntry->setHaltFunction(&halt);
- if ( libDyldEntry->vectorVersion > 5 ) {
- libDyldEntry->setNotifyMonitoringDyldMain(¬ifyMonitoringDyldMain);
- libDyldEntry->setNotifyMonitoringDyld(¬ifyMonitoringDyld);
- }
- if ( libDyldEntry->vectorVersion > 2 )
- libDyldEntry->setChildForkFunction(&_dyld_fork_child);
-#if !TARGET_IPHONE_SIMULATOR
- if ( libDyldEntry->vectorVersion > 3 )
- libDyldEntry->setLogFunction(&dyld::vlog);
-#endif
- libDyldEntry->setOldAllImageInfo(gProcessInfo);
- const dyld3::LoadedImage* libSys = loader.findImage(mainClosure->libSystemImageNum());
- libDyldEntry->setInitialImageList(mainClosure, dyldCache, sSharedCacheLoadInfo.path, allImages, *libSys);
- // run initializers
- CRSetCrashLogMessage("dyld3: launch, running initializers");
- libDyldEntry->runInitialzersBottomUp((mach_header*)mainExecutableMH);
- //dyld::log("returned from runInitialzersBottomUp()\n");
-
- if (dyld3::kdebug_trace_dyld_enabled(DBG_DYLD_TIMING_LAUNCH_EXECUTABLE)) {
- dyld3::kdebug_trace_dyld_duration_end(launchTraceID, DBG_DYLD_TIMING_LAUNCH_EXECUTABLE, 0, 0, 3);
- }
- dyld3::closure::Image::ResolvedSymbolTarget progEntry;
- if ( mainClosure->mainEntry(progEntry) ) {
- // modern app with LC_MAIN
- // set startGlue to "start" function in libdyld.dylib
- // set entry to "main" function in program
- *startGlue = (uintptr_t)(libDyldEntry->startFunc);
- *entry = loader.resolveTarget(progEntry);
- }
- else if ( mainClosure->startEntry(progEntry) ) {
- // old style app linked with crt1.o
- // entry is "start" function in program
- *startGlue = 0;
- *entry = loader.resolveTarget(progEntry);
- }
- else {
- assert(0);
- }
-
- CRSetCrashLogMessage("dyld3 mode");
- return true;
-}
-
-
-#if !TARGET_IPHONE_SIMULATOR
-
-static void putHexNibble(uint8_t value, char*& p)
-{
- if ( value < 10 )
- *p++ = '0' + value;
- else
- *p++ = 'A' + value - 10;
-}
-
-static void putHexByte(uint8_t value, char*& p)
-{
- value &= 0xFF;
- putHexNibble(value >> 4, p);
- putHexNibble(value & 0x0F, p);
-}
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-static void makeHashOfProgramAndEnv(const char* mainExecutablePath, const uint8_t* mainExecutableCDHash, const char* envp[], uint8_t hash32[32])
-{
- // create hash of main path, main cd hash, cache UUID, DYLD_* env vars
- const struct ccdigest_info* di = ccsha256_di();
- ccdigest_di_decl(di, hashTemp); // defines hashTemp array in stack
- ccdigest_init(di, hashTemp);
- // hash in main executable path
- ccdigest_update(di, hashTemp, strlen(mainExecutablePath), mainExecutablePath);
- // hash in cdHash of main executable
- if ( mainExecutableCDHash != nullptr )
- ccdigest_update(di, hashTemp, 20, mainExecutableCDHash);
- // hash in shared cache UUID
- if ( sSharedCacheLoadInfo.loadAddress != nullptr ) {
- uuid_t cacheUUID;
- sSharedCacheLoadInfo.loadAddress->getUUID(cacheUUID);
- ccdigest_update(di, hashTemp, sizeof(uuid_t), cacheUUID);
- }
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // hash in if process is restricted
- ccdigest_update(di, hashTemp, sizeof(gLinkContext.allowEnvVarsPath), &gLinkContext.allowEnvVarsPath);
-#endif
- // include dyld's UUID so changing dyld invalidates closures
- uuid_t dyldUUID;
- if ( ((const dyld3::MachOLoaded*)&__dso_handle)->getUuid(dyldUUID) )
- ccdigest_update(di, hashTemp, sizeof(uuid_t), dyldUUID);
-
- // hash in DYLD_* env vars
- for (const char* envVar : sEnvVarsToCheck) {
- if ( const char* keyValue = _simple_getenv(envp, envVar) )
- ccdigest_update(di, hashTemp, strlen(keyValue), keyValue);
- }
- // finish SHA256 into 32-byte value
- ccdigest_final(di, hashTemp, hash32);
- ccdigest_di_clear(di, hashTemp);
-}
-#endif
-
-static void buildClosureCachePath(const char* mainExecutablePath,const dyld3::MachOLoaded* mainExecutableMH,
- const uint8_t* mainExecutableCDHash, const char* envp[], char closurePath[])
-{
- // build base path of $TMPDIR/dyld/<prog-name>-
- const char* tempDir = _simple_getenv(envp, "TMPDIR");
- if ( tempDir == nullptr )
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- tempDir = "/private/tmp/";
-#else
- tempDir = "/private/var/tmp/";
-#endif
- strlcpy(closurePath, tempDir, PATH_MAX);
- strlcat(closurePath, "/com.apple.dyld/", PATH_MAX);
-
- // make sure dyld sub-dir exists
- struct stat statbuf;
- if ( ::stat(closurePath, &statbuf) != 0 ) {
- ::mkdir(closurePath, S_IRWXU);
- }
-
- const char* leafName = strrchr(mainExecutablePath, '/');
- if ( leafName == nullptr )
- leafName = mainExecutablePath;
- else
- ++leafName;
- strlcat(closurePath, leafName, PATH_MAX);
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // on macOS we allow multiple closures by hashing the env vars into the cache filename
- strlcat(closurePath, "-", PATH_MAX);
- uint8_t hash32[32];
- makeHashOfProgramAndEnv(mainExecutablePath, mainExecutableCDHash, envp, hash32);
- char hashString[72];
- char* s = hashString;
- for (int i=0; i < 32; ++i)
- putHexByte(hash32[i], s);
- *s = '\0';
- strlcat(closurePath, hashString, PATH_MAX);
-#else
- // on iOS, the file name is the leaf name and UUID
- uuid_t mainExeUUID;
- if ( mainExecutableMH->getUuid(mainExeUUID) ) {
- char mainUuidStr[40];
- bytesToHex(mainExeUUID, sizeof(uuid_t), mainUuidStr);
- strlcat(closurePath, "-", PATH_MAX);
- strlcat(closurePath, mainUuidStr, PATH_MAX);
- }
-#endif
- strlcat(closurePath, ".closure", PATH_MAX);
-}
-
-static const dyld3::closure::LaunchClosure* mapClosureFile(const char* closurePath)
-{
- struct stat statbuf;
- if ( ::stat(closurePath, &statbuf) == -1 )
- return nullptr;
-
- int fd = ::open(closurePath, O_RDONLY);
- if ( fd < 0 )
- return nullptr;
-
- const dyld3::closure::LaunchClosure* closure = (dyld3::closure::LaunchClosure*)::mmap(NULL, (size_t)statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
- ::close(fd);
-
- if ( closure == MAP_FAILED )
- return nullptr;
-
- return closure;
-}
-
-static const dyld3::closure::LaunchClosure* buildLaunchClosure(const uint8_t* mainExecutableCDHash,
- const dyld3::closure::LoadedFileInfo& mainFileInfo, const char* envp[])
-{
- const dyld3::MachOLoaded* mainExecutableMH = (const dyld3::MachOLoaded*)mainFileInfo.fileContent;
- dyld3::closure::PathOverrides pathOverrides;
- pathOverrides.setFallbackPathHandling(gLinkContext.allowClassicFallbackPaths ? dyld3::closure::PathOverrides::FallbackPathMode::classic : dyld3::closure::PathOverrides::FallbackPathMode::restricted);
- pathOverrides.setEnvVars(envp, mainExecutableMH, mainFileInfo.path);
- STACK_ALLOC_ARRAY(const dyld3::closure::ImageArray*, imagesArrays, 3);
- if ( sSharedCacheLoadInfo.loadAddress != nullptr ) {
- imagesArrays.push_back(sSharedCacheLoadInfo.loadAddress->cachedDylibsImageArray());
- if ( auto others = sSharedCacheLoadInfo.loadAddress->otherOSImageArray() )
- imagesArrays.push_back(others);
- }
-
- dyld3::closure::ClosureBuilder::LaunchErrorInfo* errorInfo = (dyld3::closure::ClosureBuilder::LaunchErrorInfo*)&gProcessInfo->errorKind;
- dyld3::closure::FileSystemPhysical fileSystem;
- dyld3::closure::ClosureBuilder::AtPath atPathHanding = (gLinkContext.allowAtPaths ? dyld3::closure::ClosureBuilder::AtPath::all : dyld3::closure::ClosureBuilder::AtPath::none);
- dyld3::closure::ClosureBuilder builder(dyld3::closure::kFirstLaunchClosureImageNum, fileSystem, sSharedCacheLoadInfo.loadAddress, true, pathOverrides, atPathHanding, errorInfo, mainExecutableMH->archName());
- const dyld3::closure::LaunchClosure* result = builder.makeLaunchClosure(mainFileInfo, gLinkContext.allowInsertFailures);
- if ( builder.diagnostics().hasError() )
- halt(builder.diagnostics().errorMessage());
-
- if ( result == nullptr )
- return nullptr;
-
- if ( !closureValid(result, mainFileInfo, mainExecutableCDHash, false, envp) ) {
- // some how the freshly generated closure is invalid...
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: somehow just built closure is invalid\n");
- return nullptr;
- }
- // try to save closure to disk for next launch (atomically)
- char closurePath[PATH_MAX];
- buildClosureCachePath(mainFileInfo.path, mainExecutableMH, mainExecutableCDHash, envp, closurePath);
- char closurePathTemp[PATH_MAX];
- strlcpy(closurePathTemp, closurePath, PATH_MAX);
- int mypid = getpid();
- char pidBuf[16];
- char* s = pidBuf;
- *s++ = '.';
- putHexByte(mypid >> 24, s);
- putHexByte(mypid >> 16, s);
- putHexByte(mypid >> 8, s);
- putHexByte(mypid, s);
- *s = '\0';
- strlcat(closurePathTemp, pidBuf, PATH_MAX);
- int fd = ::open(closurePathTemp, O_WRONLY|O_CREAT, S_IRUSR|S_IWUSR);
- if ( fd != -1 ) {
- ::ftruncate(fd, result->size());
- ::write(fd, result, result->size());
- ::fchmod(fd, S_IRUSR);
- ::close(fd);
- ::rename(closurePathTemp, closurePath);
- // free built closure and mmap file() to reduce dirty memory
- result->deallocate();
- result = mapClosureFile(closurePath);
- }
- else if ( gLinkContext.verboseWarnings ) {
- dyld::log("could not save closure (errno=%d) to: %s\n", errno, closurePathTemp);
- }
-
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: just built closure %p (size=%lu) for %s\n", result, result->size(), sExecPath);
-
- return result;
-}
-
-static const dyld3::closure::LaunchClosure* findCachedLaunchClosure(const uint8_t* mainExecutableCDHash,
- const dyld3::closure::LoadedFileInfo& mainFileInfo,
- const char* envp[])
-{
- char closurePath[PATH_MAX];
- buildClosureCachePath(mainFileInfo.path, (const dyld3::MachOLoaded*)mainFileInfo.fileContent, mainExecutableCDHash, envp, closurePath);
- const dyld3::closure::LaunchClosure* closure = mapClosureFile(closurePath);
- if ( closure == nullptr )
- return nullptr;
-
- if ( !closureValid(closure, mainFileInfo, mainExecutableCDHash, false, envp) ) {
- ::munmap((void*)closure, closure->size());
- return nullptr;
- }
-
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: used cached closure %p (size=%lu) for %s\n", closure, closure->size(), sExecPath);
-
- return closure;
-}
-
-#endif // !TARGET_IPHONE_SIMULATOR
-
-
-
-#if !__MAC_OS_X_VERSION_MIN_REQUIRED
-static const char* sWhiteListDirs[] = {
- "/bin/",
- "/sbin/",
- "/usr/bin/"
-};
-#endif
-
-static bool inWhiteList(const char* execPath)
-{
- // First test to see if we forced in dyld2 via a kernel boot-arg
- if ( dyld3::bootArgsContains("force_dyld2=1") )
- return false;
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-
- // rdar://problem/32701418: Don't use dyld3 for i386 for now.
-#if __i386__
- return false;
-#else
-
-
- return true;
-#endif // #if __i386__
-
-#else
-
-
- // <rdar://problem/33171968> enable dyld3 mode for all OS programs when using customer dyld cache (no roots)
- if ( (sSharedCacheLoadInfo.loadAddress != nullptr) && (sSharedCacheLoadInfo.loadAddress->header.cacheType == kDyldSharedCacheTypeProduction) )
- return true;
-
- return dyld3::bootArgsContains("force_dyld3=1");
-#endif
-}
-
-#if !TARGET_IPHONE_SIMULATOR
-static bool isStagedApp(const dyld3::MachOFile* mainExecutableMH, const char* mainExecutablePath)
-{
-#if !__MAC_OS_X_VERSION_MIN_REQUIRED
- if ( (strncmp(mainExecutablePath, "/var/containers/Bundle/Application/", 35) == 0)
- || (strncmp(mainExecutablePath, "/private/var/containers/Bundle/Application/", 43) == 0) ) {
- // staged apps are built without LC_ENCRYPTION_INFO
- if ( !mainExecutableMH->canBeFairPlayEncrypted() )
- return true;
- }
-#endif
- return false;
-}
-#endif
-
-//
-// Entry point for dyld. The kernel loads dyld and jumps to __dyld_start which
-// sets up some registers and call this function.
-//
-// Returns address of main() in target program which __dyld_start jumps to
-//
-uintptr_t
-_main(const macho_header* mainExecutableMH, uintptr_t mainExecutableSlide,
- int argc, const char* argv[], const char* envp[], const char* apple[],
- uintptr_t* startGlue)
-{
- if (dyld3::kdebug_trace_dyld_enabled(DBG_DYLD_TIMING_LAUNCH_EXECUTABLE)) {
- launchTraceID = dyld3::kdebug_trace_dyld_duration_start(DBG_DYLD_TIMING_LAUNCH_EXECUTABLE, (uint64_t)mainExecutableMH, 0, 0);
- }
-
- // Grab the cdHash of the main executable from the environment
- uint8_t mainExecutableCDHashBuffer[20];
- const uint8_t* mainExecutableCDHash = nullptr;
- if ( hexToBytes(_simple_getenv(apple, "executable_cdhash"), 40, mainExecutableCDHashBuffer) )
- mainExecutableCDHash = mainExecutableCDHashBuffer;
-
- // Trace dyld's load
- notifyKernelAboutImage((macho_header*)&__dso_handle, _simple_getenv(apple, "dyld_file"));
-#if !TARGET_IPHONE_SIMULATOR
- // Trace the main executable's load
- notifyKernelAboutImage(mainExecutableMH, _simple_getenv(apple, "executable_file"));
-#endif
-
- uintptr_t result = 0;
- sMainExecutableMachHeader = mainExecutableMH;
- sMainExecutableSlide = mainExecutableSlide;
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // if this is host dyld, check to see if iOS simulator is being run
- const char* rootPath = _simple_getenv(envp, "DYLD_ROOT_PATH");
- if ( (rootPath != NULL) ) {
- // look to see if simulator has its own dyld
- char simDyldPath[PATH_MAX];
- strlcpy(simDyldPath, rootPath, PATH_MAX);
- strlcat(simDyldPath, "/usr/lib/dyld_sim", PATH_MAX);
- int fd = my_open(simDyldPath, O_RDONLY, 0);
- if ( fd != -1 ) {
- const char* errMessage = useSimulatorDyld(fd, mainExecutableMH, simDyldPath, argc, argv, envp, apple, startGlue, &result);
- if ( errMessage != NULL )
- halt(errMessage);
- return result;
- }
- }
-#endif
-
- CRSetCrashLogMessage("dyld: launch started");
-
- setContext(mainExecutableMH, argc, argv, envp, apple);
-
- // Pickup the pointer to the exec path.
- sExecPath = _simple_getenv(apple, "executable_path");
-
- // <rdar://problem/13868260> Remove interim apple[0] transition code from dyld
- if (!sExecPath) sExecPath = apple[0];
-
- if ( sExecPath[0] != '/' ) {
- // have relative path, use cwd to make absolute
- char cwdbuff[MAXPATHLEN];
- if ( getcwd(cwdbuff, MAXPATHLEN) != NULL ) {
- // maybe use static buffer to avoid calling malloc so early...
- char* s = new char[strlen(cwdbuff) + strlen(sExecPath) + 2];
- strcpy(s, cwdbuff);
- strcat(s, "/");
- strcat(s, sExecPath);
- sExecPath = s;
- }
- }
-
- // Remember short name of process for later logging
- sExecShortName = ::strrchr(sExecPath, '/');
- if ( sExecShortName != NULL )
- ++sExecShortName;
- else
- sExecShortName = sExecPath;
-
- configureProcessRestrictions(mainExecutableMH);
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- if ( !gLinkContext.allowEnvVarsPrint && !gLinkContext.allowEnvVarsPath && !gLinkContext.allowEnvVarsSharedCache ) {
- pruneEnvironmentVariables(envp, &apple);
- // set again because envp and apple may have changed or moved
- setContext(mainExecutableMH, argc, argv, envp, apple);
- }
- else
-#endif
- {
- checkEnvironmentVariables(envp);
- defaultUninitializedFallbackPaths(envp);
- }
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- if ( ((dyld3::MachOFile*)mainExecutableMH)->supportsPlatform(dyld3::Platform::iOSMac)
- && !((dyld3::MachOFile*)mainExecutableMH)->supportsPlatform(dyld3::Platform::macOS)) {
- gLinkContext.rootPaths = parseColonList("/System/iOSSupport", NULL);
- gLinkContext.marzipan = true;
- if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == sLibraryFallbackPaths )
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = sRestrictedLibraryFallbackPaths;
- if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == sFrameworkFallbackPaths )
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = sRestrictedFrameworkFallbackPaths;
- }
-#endif
- if ( sEnv.DYLD_PRINT_OPTS )
- printOptions(argv);
- if ( sEnv.DYLD_PRINT_ENV )
- printEnvironmentVariables(envp);
- getHostInfo(mainExecutableMH, mainExecutableSlide);
-
- // load shared cache
- checkSharedRegionDisable((dyld3::MachOLoaded*)mainExecutableMH, mainExecutableSlide);
-#if TARGET_IPHONE_SIMULATOR
- // <HACK> until <rdar://30773711> is fixed
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
- // </HACK>
-#endif
- if ( gLinkContext.sharedRegionMode != ImageLoader::kDontUseSharedRegion ) {
- mapSharedCache();
- }
- bool cacheCompatible = (sSharedCacheLoadInfo.loadAddress == nullptr) || (sSharedCacheLoadInfo.loadAddress->header.formatVersion == dyld3::closure::kFormatVersion);
- if ( cacheCompatible && (sEnableClosures || inWhiteList(sExecPath)) ) {
- const dyld3::closure::LaunchClosure* mainClosure = nullptr;
- dyld3::closure::LoadedFileInfo mainFileInfo;
- mainFileInfo.fileContent = mainExecutableMH;
- mainFileInfo.path = sExecPath;
- // FIXME: If we are saving this closure, this slice offset/length is probably wrong in the case of FAT files.
- mainFileInfo.sliceOffset = 0;
- mainFileInfo.sliceLen = std::numeric_limits<__typeof(mainFileInfo.sliceLen)>::max();
- struct stat mainExeStatBuf;
- if ( ::stat(sExecPath, &mainExeStatBuf) == 0 ) {
- mainFileInfo.inode = mainExeStatBuf.st_ino;
- mainFileInfo.mtime = mainExeStatBuf.st_mtime;
- }
- // check for closure in cache first
- if ( sSharedCacheLoadInfo.loadAddress != nullptr ) {
- mainClosure = sSharedCacheLoadInfo.loadAddress->findClosure(sExecPath);
- if ( gLinkContext.verboseWarnings && (mainClosure != nullptr) )
- dyld::log("dyld: found closure %p (size=%lu) in dyld shared cache\n", mainClosure, mainClosure->size());
- }
- #if !TARGET_IPHONE_SIMULATOR
- if ( (mainClosure == nullptr) || !closureValid(mainClosure, mainFileInfo, mainExecutableCDHash, true, envp) ) {
- mainClosure = nullptr;
- if ( sEnableClosures || isStagedApp((dyld3::MachOFile*)mainExecutableMH, sExecPath) ) {
- // if forcing closures, and no closure in cache, or it is invalid, check for cached closure
- mainClosure = findCachedLaunchClosure(mainExecutableCDHash, mainFileInfo, envp);
- if ( mainClosure == nullptr ) {
- // if no cached closure found, build new one
- mainClosure = buildLaunchClosure(mainExecutableCDHash, mainFileInfo, envp);
- }
- }
- }
- #endif
- // try using launch closure
- if ( mainClosure != nullptr ) {
- CRSetCrashLogMessage("dyld3: launch started");
- bool launched = launchWithClosure(mainClosure, sSharedCacheLoadInfo.loadAddress, (dyld3::MachOLoaded*)mainExecutableMH,
- mainExecutableSlide, argc, argv, envp, apple, &result, startGlue);
- #if !TARGET_IPHONE_SIMULATOR
- if ( !launched ) {
- // closure is out of date, build new one
- mainClosure = buildLaunchClosure(mainExecutableCDHash, mainFileInfo, envp);
- if ( mainClosure != nullptr ) {
- launched = launchWithClosure(mainClosure, sSharedCacheLoadInfo.loadAddress, (dyld3::MachOLoaded*)mainExecutableMH,
- mainExecutableSlide, argc, argv, envp, apple, &result, startGlue);
- }
- }
- #endif
- if ( launched ) {
-#if __has_feature(ptrauth_calls)
- // start() calls the result pointer as a function pointer so we need to sign it.
- result = (uintptr_t)__builtin_ptrauth_sign_unauthenticated((void*)result, 0, 0);
-#endif
- if (sSkipMain)
- result = (uintptr_t)&fake_main;
- return result;
- }
- else {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: unable to use closure %p\n", mainClosure);
- }
- }
- }
- else {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: not using closure because shared cache format version does not match dyld's\n");
- }
- // could not use closure info, launch old way
-
-
-
- // install gdb notifier
- stateToHandlers(dyld_image_state_dependents_mapped, sBatchHandlers)->push_back(notifyGDB);
- stateToHandlers(dyld_image_state_mapped, sSingleHandlers)->push_back(updateAllImages);
- // make initial allocations large enough that it is unlikely to need to be re-alloced
- sImageRoots.reserve(16);
- sAddImageCallbacks.reserve(4);
- sRemoveImageCallbacks.reserve(4);
- sAddLoadImageCallbacks.reserve(4);
- sImageFilesNeedingTermination.reserve(16);
- sImageFilesNeedingDOFUnregistration.reserve(8);
-
-#if !TARGET_IPHONE_SIMULATOR
-#ifdef WAIT_FOR_SYSTEM_ORDER_HANDSHAKE
- // <rdar://problem/6849505> Add gating mechanism to dyld support system order file generation process
- WAIT_FOR_SYSTEM_ORDER_HANDSHAKE(dyld::gProcessInfo->systemOrderFlag);
-#endif
-#endif
-
-
- try {
- // add dyld itself to UUID list
- addDyldImageToUUIDList();
-
-#if SUPPORT_ACCELERATE_TABLES
-#if __arm64e__
- // Disable accelerator tables when we have threaded rebase/bind, which is arm64e executables only for now.
- if (sMainExecutableMachHeader->cpusubtype == CPU_SUBTYPE_ARM64_E)
- sDisableAcceleratorTables = true;
-#endif
- bool mainExcutableAlreadyRebased = false;
- if ( (sSharedCacheLoadInfo.loadAddress != nullptr) && !dylibsCanOverrideCache() && !sDisableAcceleratorTables && (sSharedCacheLoadInfo.loadAddress->header.accelerateInfoAddr != 0) ) {
- struct stat statBuf;
- if ( ::stat(IPHONE_DYLD_SHARED_CACHE_DIR "no-dyld2-accelerator-tables", &statBuf) != 0 )
- sAllCacheImagesProxy = ImageLoaderMegaDylib::makeImageLoaderMegaDylib(&sSharedCacheLoadInfo.loadAddress->header, sSharedCacheLoadInfo.slide, mainExecutableMH, gLinkContext);
- }
-
-reloadAllImages:
-#endif
-
- CRSetCrashLogMessage(sLoadingCrashMessage);
- // instantiate ImageLoader for main executable
- sMainExecutable = instantiateFromLoadedImage(mainExecutableMH, mainExecutableSlide, sExecPath);
- gLinkContext.mainExecutable = sMainExecutable;
- gLinkContext.mainExecutableCodeSigned = hasCodeSignatureLoadCommand(mainExecutableMH);
-
-#if TARGET_IPHONE_SIMULATOR
- // check main executable is not too new for this OS
- {
- if ( ! isSimulatorBinary((uint8_t*)mainExecutableMH, sExecPath) ) {
- throwf("program was built for a platform that is not supported by this runtime");
- }
- uint32_t mainMinOS = sMainExecutable->minOSVersion();
-
- // dyld is always built for the current OS, so we can get the current OS version
- // from the load command in dyld itself.
- uint32_t dyldMinOS = ImageLoaderMachO::minOSVersion((const mach_header*)&__dso_handle);
- if ( mainMinOS > dyldMinOS ) {
- #if TARGET_OS_WATCH
- throwf("app was built for watchOS %d.%d which is newer than this simulator %d.%d",
- mainMinOS >> 16, ((mainMinOS >> 8) & 0xFF),
- dyldMinOS >> 16, ((dyldMinOS >> 8) & 0xFF));
- #elif TARGET_OS_TV
- throwf("app was built for tvOS %d.%d which is newer than this simulator %d.%d",
- mainMinOS >> 16, ((mainMinOS >> 8) & 0xFF),
- dyldMinOS >> 16, ((dyldMinOS >> 8) & 0xFF));
- #else
- throwf("app was built for iOS %d.%d which is newer than this simulator %d.%d",
- mainMinOS >> 16, ((mainMinOS >> 8) & 0xFF),
- dyldMinOS >> 16, ((dyldMinOS >> 8) & 0xFF));
- #endif
- }
- }
-#endif
-
-
- #if __MAC_OS_X_VERSION_MIN_REQUIRED
- // <rdar://problem/22805519> be less strict about old mach-o binaries
- uint32_t mainSDK = sMainExecutable->sdkVersion();
- gLinkContext.strictMachORequired = (mainSDK >= DYLD_MACOSX_VERSION_10_12) || gLinkContext.allowInsertFailures;
- #else
- // simulators, iOS, tvOS, and watchOS are always strict
- gLinkContext.strictMachORequired = true;
- #endif
-
- #if SUPPORT_ACCELERATE_TABLES
- sAllImages.reserve((sAllCacheImagesProxy != NULL) ? 16 : INITIAL_IMAGE_COUNT);
- #else
- sAllImages.reserve(INITIAL_IMAGE_COUNT);
- #endif
-
- // Now that shared cache is loaded, setup an versioned dylib overrides
- #if SUPPORT_VERSIONED_PATHS
- checkVersionedPaths();
- #endif
-
-
- // dyld_all_image_infos image list does not contain dyld
- // add it as dyldPath field in dyld_all_image_infos
- // for simulator, dyld_sim is in image list, need host dyld added
-#if TARGET_IPHONE_SIMULATOR
- // get path of host dyld from table of syscall vectors in host dyld
- void* addressInDyld = gSyscallHelpers;
-#else
- // get path of dyld itself
- void* addressInDyld = (void*)&__dso_handle;
-#endif
- char dyldPathBuffer[MAXPATHLEN+1];
- int len = proc_regionfilename(getpid(), (uint64_t)(long)addressInDyld, dyldPathBuffer, MAXPATHLEN);
- if ( len > 0 ) {
- dyldPathBuffer[len] = '\0'; // proc_regionfilename() does not zero terminate returned string
- if ( strcmp(dyldPathBuffer, gProcessInfo->dyldPath) != 0 )
- gProcessInfo->dyldPath = strdup(dyldPathBuffer);
- }
-
- // load any inserted libraries
- if ( sEnv.DYLD_INSERT_LIBRARIES != NULL ) {
- for (const char* const* lib = sEnv.DYLD_INSERT_LIBRARIES; *lib != NULL; ++lib)
- loadInsertedDylib(*lib);
- }
- // record count of inserted libraries so that a flat search will look at
- // inserted libraries, then main, then others.
- sInsertedDylibCount = sAllImages.size()-1;
-
- // link main executable
- gLinkContext.linkingMainExecutable = true;
-#if SUPPORT_ACCELERATE_TABLES
- if ( mainExcutableAlreadyRebased ) {
- // previous link() on main executable has already adjusted its internal pointers for ASLR
- // work around that by rebasing by inverse amount
- sMainExecutable->rebase(gLinkContext, -mainExecutableSlide);
- }
-#endif
- link(sMainExecutable, sEnv.DYLD_BIND_AT_LAUNCH, true, ImageLoader::RPathChain(NULL, NULL), -1);
- sMainExecutable->setNeverUnloadRecursive();
- if ( sMainExecutable->forceFlat() ) {
- gLinkContext.bindFlat = true;
- gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
- }
-
- // link any inserted libraries
- // do this after linking main executable so that any dylibs pulled in by inserted
- // dylibs (e.g. libSystem) will not be in front of dylibs the program uses
- if ( sInsertedDylibCount > 0 ) {
- for(unsigned int i=0; i < sInsertedDylibCount; ++i) {
- ImageLoader* image = sAllImages[i+1];
- link(image, sEnv.DYLD_BIND_AT_LAUNCH, true, ImageLoader::RPathChain(NULL, NULL), -1);
- image->setNeverUnloadRecursive();
- }
- // only INSERTED libraries can interpose
- // register interposing info after all inserted libraries are bound so chaining works
- for(unsigned int i=0; i < sInsertedDylibCount; ++i) {
- ImageLoader* image = sAllImages[i+1];
- image->registerInterposing(gLinkContext);
- }
- }
-
- // <rdar://problem/19315404> dyld should support interposition even without DYLD_INSERT_LIBRARIES
- for (long i=sInsertedDylibCount+1; i < sAllImages.size(); ++i) {
- ImageLoader* image = sAllImages[i];
- if ( image->inSharedCache() )
- continue;
- image->registerInterposing(gLinkContext);
- }
- #if SUPPORT_ACCELERATE_TABLES
- if ( (sAllCacheImagesProxy != NULL) && ImageLoader::haveInterposingTuples() ) {
- // Accelerator tables cannot be used with implicit interposing, so relaunch with accelerator tables disabled
- ImageLoader::clearInterposingTuples();
- // unmap all loaded dylibs (but not main executable)
- for (long i=1; i < sAllImages.size(); ++i) {
- ImageLoader* image = sAllImages[i];
- if ( image == sMainExecutable )
- continue;
- if ( image == sAllCacheImagesProxy )
- continue;
- image->setCanUnload();
- ImageLoader::deleteImage(image);
- }
- // note: we don't need to worry about inserted images because if DYLD_INSERT_LIBRARIES was set we would not be using the accelerator table
- sAllImages.clear();
- sImageRoots.clear();
- sImageFilesNeedingTermination.clear();
- sImageFilesNeedingDOFUnregistration.clear();
- sAddImageCallbacks.clear();
- sRemoveImageCallbacks.clear();
- sAddLoadImageCallbacks.clear();
- sDisableAcceleratorTables = true;
- sAllCacheImagesProxy = NULL;
- sMappedRangesStart = NULL;
- mainExcutableAlreadyRebased = true;
- gLinkContext.linkingMainExecutable = false;
- resetAllImages();
- goto reloadAllImages;
- }
- #endif
-
- // apply interposing to initial set of images
- for(int i=0; i < sImageRoots.size(); ++i) {
- sImageRoots[i]->applyInterposing(gLinkContext);
- }
- ImageLoader::applyInterposingToDyldCache(gLinkContext);
- gLinkContext.linkingMainExecutable = false;
-
- // Bind and notify for the main executable now that interposing has been registered
- uint64_t bindMainExecutableStartTime = mach_absolute_time();
- sMainExecutable->recursiveBindWithAccounting(gLinkContext, sEnv.DYLD_BIND_AT_LAUNCH, true);
- uint64_t bindMainExecutableEndTime = mach_absolute_time();
- ImageLoaderMachO::fgTotalBindTime += bindMainExecutableEndTime - bindMainExecutableStartTime;
- gLinkContext.notifyBatch(dyld_image_state_bound, false);
-
- // Bind and notify for the inserted images now interposing has been registered
- if ( sInsertedDylibCount > 0 ) {
- for(unsigned int i=0; i < sInsertedDylibCount; ++i) {
- ImageLoader* image = sAllImages[i+1];
- image->recursiveBind(gLinkContext, sEnv.DYLD_BIND_AT_LAUNCH, true);
- }
- }
-
- // <rdar://problem/12186933> do weak binding only after all inserted images linked
- sMainExecutable->weakBind(gLinkContext);
-
- // If cache has branch island dylibs, tell debugger about them
- if ( (sSharedCacheLoadInfo.loadAddress != NULL) && (sSharedCacheLoadInfo.loadAddress->header.mappingOffset >= 0x78) && (sSharedCacheLoadInfo.loadAddress->header.branchPoolsOffset != 0) ) {
- uint32_t count = sSharedCacheLoadInfo.loadAddress->header.branchPoolsCount;
- dyld_image_info info[count];
- const uint64_t* poolAddress = (uint64_t*)((char*)sSharedCacheLoadInfo.loadAddress + sSharedCacheLoadInfo.loadAddress->header.branchPoolsOffset);
- // <rdar://problem/20799203> empty branch pools can be in development cache
- if ( ((mach_header*)poolAddress)->magic == sMainExecutableMachHeader->magic ) {
- for (int poolIndex=0; poolIndex < count; ++poolIndex) {
- uint64_t poolAddr = poolAddress[poolIndex] + sSharedCacheLoadInfo.slide;
- info[poolIndex].imageLoadAddress = (mach_header*)(long)poolAddr;
- info[poolIndex].imageFilePath = "dyld_shared_cache_branch_islands";
- info[poolIndex].imageFileModDate = 0;
- }
- // add to all_images list
- addImagesToAllImages(count, info);
- // tell gdb about new branch island images
- gProcessInfo->notification(dyld_image_adding, count, info);
- }
- }
-
- CRSetCrashLogMessage("dyld: launch, running initializers");
- #if SUPPORT_OLD_CRT_INITIALIZATION
- // Old way is to run initializers via a callback from crt1.o
- if ( ! gRunInitializersOldWay )
- initializeMainExecutable();
- #else
- // run all initializers
- initializeMainExecutable();
- #endif
-
- // notify any montoring proccesses that this process is about to enter main()
- if (dyld3::kdebug_trace_dyld_enabled(DBG_DYLD_TIMING_LAUNCH_EXECUTABLE)) {
- dyld3::kdebug_trace_dyld_duration_end(launchTraceID, DBG_DYLD_TIMING_LAUNCH_EXECUTABLE, 0, 0, 2);
- }
- notifyMonitoringDyldMain();
-
- // find entry point for main executable
- result = (uintptr_t)sMainExecutable->getEntryFromLC_MAIN();
- if ( result != 0 ) {
- // main executable uses LC_MAIN, we need to use helper in libdyld to call into main()
- if ( (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 9) )
- *startGlue = (uintptr_t)gLibSystemHelpers->startGlueToCallExit;
- else
- halt("libdyld.dylib support not present for LC_MAIN");
- }
- else {
- // main executable uses LC_UNIXTHREAD, dyld needs to let "start" in program set up for main()
- result = (uintptr_t)sMainExecutable->getEntryFromLC_UNIXTHREAD();
- *startGlue = 0;
- }
-#if __has_feature(ptrauth_calls)
- // start() calls the result pointer as a function pointer so we need to sign it.
- result = (uintptr_t)__builtin_ptrauth_sign_unauthenticated((void*)result, 0, 0);
-#endif
- }
- catch(const char* message) {
- syncAllImages();
- halt(message);
- }
- catch(...) {
- dyld::log("dyld: launch failed\n");
- }
-
- CRSetCrashLogMessage("dyld2 mode");
-
- if (sSkipMain) {
- if (dyld3::kdebug_trace_dyld_enabled(DBG_DYLD_TIMING_LAUNCH_EXECUTABLE)) {
- dyld3::kdebug_trace_dyld_duration_end(launchTraceID, DBG_DYLD_TIMING_LAUNCH_EXECUTABLE, 0, 0, 2);
- }
- result = (uintptr_t)&fake_main;
- *startGlue = (uintptr_t)gLibSystemHelpers->startGlueToCallExit;
- }
-
- return result;
-}
-
-
-} // namespace
-
-
-
projects / apple / dyld.git / blobdiff