X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/b0d623f7f2ae71ed96e60569f61f9a9a27016e80..15129b1c8dbb3650c63b70adb1cad9af601c6c17:/osfmk/kern/debug.c?ds=sidebyside diff --git a/osfmk/kern/debug.c b/osfmk/kern/debug.c index acec72979..7ee11d7a9 100644 --- a/osfmk/kern/debug.c +++ b/osfmk/kern/debug.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000-2007 Apple Inc. All rights reserved. + * Copyright (c) 2000-2013 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -55,8 +55,6 @@ */ #include -#include -#include #include #include @@ -68,6 +66,7 @@ #include #include #include +#include #include #include #include @@ -75,20 +74,19 @@ #include #endif -#ifdef __ppc__ -#include -#include -#endif - #if defined(__i386__) || defined(__x86_64__) #include #include #endif #include +#include #include #include +#include +#include +#include unsigned int halt_in_debugger = 0; unsigned int switch_debugger = 0; @@ -111,17 +109,18 @@ unsigned int panic_is_inited = 0; unsigned int return_on_panic = 0; unsigned long panic_caller; -#if CONFIG_EMBEDDED -#define DEBUG_BUF_SIZE (PAGE_SIZE) -#else #define DEBUG_BUF_SIZE (3 * PAGE_SIZE) -#endif char debug_buf[DEBUG_BUF_SIZE]; char *debug_buf_ptr = debug_buf; unsigned int debug_buf_size = sizeof(debug_buf); static char model_name[64]; +unsigned char *kernel_uuid; +/* uuid_string_t */ char kernel_uuid_string[37]; + +static spl_t panic_prologue(const char *str); +static void panic_epilogue(spl_t s); struct pasc { unsigned a: 7; @@ -155,7 +154,15 @@ Assert( } saved_return_on_panic = return_on_panic; - return_on_panic = 1; + + /* + * If we don't have a debugger configured, returning from an + * assert is a bad, bad idea; there is no guarantee that we + * didn't simply assert before we were able to restart the + * platform. + */ + if (current_debugger != NO_CUR_DB) + return_on_panic = 1; panic_plain("%s:%d Assertion failed: %s", file, line, expression); @@ -180,10 +187,18 @@ MACRO_BEGIN \ simple_unlock(&panic_lock); \ MACRO_END - void panic_init(void) { + unsigned long uuidlen = 0; + void *uuid; + + uuid = getuuidfromheader(&_mh_execute_header, &uuidlen); + if ((uuid != NULL) && (uuidlen == sizeof(uuid_t))) { + kernel_uuid = uuid; + uuid_unparse_upper(*(uuid_t *)uuid, kernel_uuid_string); + } + simple_lock_init(&panic_lock, 0); panic_is_inited = 1; panic_caller = 0; @@ -216,45 +231,44 @@ debug_log_init(void) void _consume_panic_args(int a __unused, ...) { - panic(NULL); + panic("panic"); } -void -panic(const char *str, ...) +static spl_t +panic_prologue(const char *str) { - va_list listp; spl_t s; - thread_t thread; - wait_queue_t wq; - - if (kdebug_enable) - kdbg_dump_trace_to_file("/var/tmp/panic.trace"); + if (kdebug_enable) { + if (get_preemption_level() == 0 && !ml_at_interrupt_context()) { + ml_set_interrupts_enabled(TRUE); + kdbg_dump_trace_to_file("/var/tmp/panic.trace"); + } + } s = splhigh(); disable_preemption(); - panic_safe(); +#if defined(__i386__) || defined(__x86_64__) + /* Attempt to display the unparsed panic string */ + const char *tstr = str; -#ifdef __ppc__ - lastTrace = LLTraceSet(0); /* Disable low-level tracing */ + kprintf("Panic initiated, string: "); + while (tstr && *tstr) + kprintf("%c", *tstr++); + kprintf("\n"); #endif - thread = current_thread(); /* Get failing thread */ - wq = thread->wait_queue; /* Save the old value */ - thread->wait_queue = NULL; /* Clear the wait so we do not get double panics when we try locks */ + panic_safe(); if( logPanicDataToScreen ) disable_debug_output = FALSE; debug_mode = TRUE; - /* panic_caller is initialized to 0. If set, don't change it */ - if ( ! panic_caller ) - panic_caller = (unsigned long)(char *)__builtin_return_address(0); - restart: PANIC_LOCK(); + if (panicstr) { if (cpu_number() != paniccpu) { PANIC_UNLOCK(); @@ -279,26 +293,19 @@ restart: panicwait = 1; PANIC_UNLOCK(); - kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller); - if (str) { - va_start(listp, str); - _doprnt(str, &listp, consdebug_putc, 0); - va_end(listp); - } - kdb_printf("\n"); + return(s); +} - /* - * Release panicwait indicator so that other cpus may call Debugger(). - */ - panicwait = 0; - Debugger("panic"); + +static void +panic_epilogue(spl_t s) +{ /* * Release panicstr so that we can handle normally other panics. */ PANIC_LOCK(); panicstr = (char *)0; PANIC_UNLOCK(); - thread->wait_queue = wq; /* Restore the wait queue */ if (return_on_panic) { panic_normal(); @@ -306,12 +313,67 @@ restart: splx(s); return; } - kdb_printf("panic: We are hanging here...\n"); panic_stop(); /* NOTREACHED */ } +void +panic(const char *str, ...) +{ + va_list listp; + spl_t s; + + + /* panic_caller is initialized to 0. If set, don't change it */ + if ( ! panic_caller ) + panic_caller = (unsigned long)(char *)__builtin_return_address(0); + + s = panic_prologue(str); + kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller); + if (str) { + va_start(listp, str); + _doprnt(str, &listp, consdebug_putc, 0); + va_end(listp); + } + kdb_printf("\n"); + + /* + * Release panicwait indicator so that other cpus may call Debugger(). + */ + panicwait = 0; + Debugger("panic"); + panic_epilogue(s); +} + +void +panic_context(unsigned int reason, void *ctx, const char *str, ...) +{ + va_list listp; + spl_t s; + + + /* panic_caller is initialized to 0. If set, don't change it */ + if ( ! panic_caller ) + panic_caller = (unsigned long)(char *)__builtin_return_address(0); + + s = panic_prologue(str); + kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller); + if (str) { + va_start(listp, str); + _doprnt(str, &listp, consdebug_putc, 0); + va_end(listp); + } + kdb_printf("\n"); + + /* + * Release panicwait indicator so that other cpus may call Debugger(). + */ + panicwait = 0; + DebuggerWithContext(reason, ctx, "panic"); + panic_epilogue(s); +} + void log(__unused int level, char *fmt, ...) { @@ -340,6 +402,7 @@ debug_putc(char c) } /* In-place packing routines -- inefficient, but they're called at most once. + * Assumes "buflen" is a multiple of 8. */ int packA(char *inbuf, uint32_t length, uint32_t buflen) @@ -347,7 +410,7 @@ int packA(char *inbuf, uint32_t length, uint32_t buflen) unsigned int i, j = 0; pasc_t pack; - length = MIN(((length & ~7) +8), buflen); + length = MIN(((length + 7) & ~7), buflen); for (i = 0; i < length; i+=8) { @@ -362,7 +425,7 @@ int packA(char *inbuf, uint32_t length, uint32_t buflen) bcopy ((char *) &pack, inbuf + j, 7); j += 7; } - return ((length * 7)/8); + return j; } void unpackA(char *inbuf, uint32_t length) @@ -414,10 +477,27 @@ static void panic_display_model_name(void) { if (ml_nofault_copy((vm_offset_t) &model_name, (vm_offset_t) &tmp_model_name, sizeof(model_name)) != sizeof(model_name)) return; - model_name[sizeof(model_name) - 1] = '\0'; + tmp_model_name[sizeof(tmp_model_name) - 1] = '\0'; + + if (tmp_model_name[0] != 0) + kdb_printf("System model name: %s\n", tmp_model_name); +} + +static void panic_display_kernel_uuid(void) { + char tmp_kernel_uuid[sizeof(kernel_uuid_string)]; + + if (ml_nofault_copy((vm_offset_t) &kernel_uuid_string, (vm_offset_t) &tmp_kernel_uuid, sizeof(kernel_uuid_string)) != sizeof(kernel_uuid_string)) + return; + + if (tmp_kernel_uuid[0] != '\0') + kdb_printf("Kernel UUID: %s\n", tmp_kernel_uuid); +} - if (model_name[0] != 0) - kdb_printf("System model name: %s\n", model_name); +void panic_display_kernel_aslr(void) { + if (vm_kernel_slide) { + kdb_printf("Kernel slide: 0x%016lx\n", (unsigned long) vm_kernel_slide); + kdb_printf("Kernel text base: %p\n", (void *) vm_kernel_stext); + } } static void panic_display_uptime(void) { @@ -430,27 +510,38 @@ static void panic_display_uptime(void) { extern const char version[]; extern char osversion[]; +static volatile uint32_t config_displayed = 0; + __private_extern__ void panic_display_system_configuration(void) { - static boolean_t config_displayed = FALSE; panic_display_process_name(); - if (config_displayed == FALSE) { + if (OSCompareAndSwap(0, 1, &config_displayed)) { + char buf[256]; + if (strlcpy(buf, PE_boot_args(), sizeof(buf))) + kdb_printf("Boot args: %s\n", buf); kdb_printf("\nMac OS version:\n%s\n", (osversion[0] != 0) ? osversion : "Not yet set"); kdb_printf("\nKernel version:\n%s\n",version); + panic_display_kernel_uuid(); + panic_display_kernel_aslr(); + panic_display_pal_info(); panic_display_model_name(); panic_display_uptime(); - config_displayed = TRUE; panic_display_zprint(); +#if CONFIG_ZLEAKS + panic_display_ztrace(); +#endif /* CONFIG_ZLEAKS */ kext_dump_panic_lists(&kdb_log); } } extern zone_t first_zone; extern unsigned int num_zones, stack_total; +extern unsigned long long stack_allocs; #if defined(__i386__) || defined (__x86_64__) extern unsigned int inuse_ptepages_count; +extern long long alloc_ptepages_count; #endif extern boolean_t panic_include_zprint; @@ -490,12 +581,43 @@ __private_extern__ void panic_display_zprint() } } +#if CONFIG_ZLEAKS +extern boolean_t panic_include_ztrace; +extern struct ztrace* top_ztrace; +/* + * Prints the backtrace most suspected of being a leaker, if we paniced in the zone allocator. + * top_ztrace and panic_include_ztrace comes from osfmk/kern/zalloc.c + */ +__private_extern__ void panic_display_ztrace(void) +{ + if(panic_include_ztrace == TRUE) { + unsigned int i = 0; + struct ztrace top_ztrace_copy; + + /* Make sure not to trip another panic if there's something wrong with memory */ + if(ml_nofault_copy((vm_offset_t)top_ztrace, (vm_offset_t)&top_ztrace_copy, sizeof(struct ztrace)) == sizeof(struct ztrace)) { + kdb_printf("\nBacktrace suspected of leaking: (outstanding bytes: %lu)\n", (uintptr_t)top_ztrace_copy.zt_size); + /* Print the backtrace addresses */ + for (i = 0; (i < top_ztrace_copy.zt_depth && i < MAX_ZTRACE_DEPTH) ; i++) { + kdb_printf("%p\n", top_ztrace_copy.zt_stack[i]); + } + /* Print any kexts in that backtrace, along with their link addresses so we can properly blame them */ + kmod_panic_dump((vm_offset_t *)&top_ztrace_copy.zt_stack[0], top_ztrace_copy.zt_depth); + } + else { + kdb_printf("\nCan't access top_ztrace...\n"); + } + kdb_printf("\n"); + } +} +#endif /* CONFIG_ZLEAKS */ + #if !MACH_KDP -static struct ether_addr kdp_current_mac_address = {{0, 0, 0, 0, 0, 0}}; +static struct kdp_ether_addr kdp_current_mac_address = {{0, 0, 0, 0, 0, 0}}; /* XXX ugly forward declares to stop warnings */ void *kdp_get_interface(void); -void kdp_set_ip_and_mac_addresses(struct in_addr *, struct ether_addr *); +void kdp_set_ip_and_mac_addresses(struct kdp_in_addr *, struct kdp_ether_addr *); void kdp_set_gateway_mac(void *); void kdp_set_interface(void *); void kdp_register_send_receive(void *, void *); @@ -514,7 +636,7 @@ unsigned int kdp_get_ip_address(void ) { return 0; } -struct ether_addr +struct kdp_ether_addr kdp_get_mac_addr(void) { return kdp_current_mac_address; @@ -522,8 +644,8 @@ kdp_get_mac_addr(void) void kdp_set_ip_and_mac_addresses( - __unused struct in_addr *ipaddr, - __unused struct ether_addr *macaddr) + __unused struct kdp_in_addr *ipaddr, + __unused struct kdp_ether_addr *macaddr) {} void @@ -560,3 +682,10 @@ kdp_stack_snapshot_bytes_traced(void) } #endif + +#if !CONFIG_TELEMETRY +int telemetry_gather(user_addr_t buffer __unused, uint32_t *length __unused, boolean_t mark __unused) +{ + return KERN_NOT_SUPPORTED; +} +#endif