+/*
+ * machvm_tests.c
+ * xnu_quick_test
+ *
+ * Copyright 2008 Apple Inc. All rights reserved.
+ *
+ */
+
+#include "tests.h"
+#include <mach/mach.h>
+#include <unistd.h>
+#include <err.h>
+#include <sys/param.h>
+#include <mach-o/ldsyms.h>
+
+extern int g_is_under_rosetta;
+
+int machvm_tests( void * the_argp )
+{
+ int pagesize = getpagesize();
+ int regionsizes[] = { 1, 3, 7, 13, 77, 1223 }; /* sizes must be in increasing order */
+ char *regionbuffers[] = { NULL, NULL, NULL, NULL, NULL, NULL };
+ int i;
+ kern_return_t kret;
+
+ /* Use vm_allocate to grab some memory */
+ for (i=0; i < sizeof(regionsizes)/sizeof(regionsizes[0]); i++) {
+ vm_address_t addr = 0;
+
+ kret = vm_allocate(mach_task_self(), &addr, regionsizes[i]*pagesize, VM_FLAGS_ANYWHERE);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_allocate of %d pages failed: %d", regionsizes[i], kret);
+ goto fail;
+ }
+ regionbuffers[i] = (char *)addr;
+ }
+
+ /* deallocate one range without having touched it, scribble on another, then deallocate that one */
+ kret = vm_deallocate(mach_task_self(), (vm_address_t)regionbuffers[4], regionsizes[4]*pagesize);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_deallocate of %d pages failed: %d", regionsizes[4], kret);
+ goto fail;
+ }
+ regionbuffers[4] = NULL;
+
+ memset(regionbuffers[3], 0x4f, pagesize*MIN(3, regionsizes[3]));
+
+ kret = vm_deallocate(mach_task_self(), (vm_address_t)regionbuffers[3], regionsizes[3]*pagesize);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_deallocate of %d pages failed: %d", regionsizes[3], kret);
+ goto fail;
+ }
+ regionbuffers[3] = NULL;
+
+ // populate the largest buffer with a byte pattern that matches the page offset, then fix it to readonly
+ for (i=0; i < regionsizes[5]; i++) {
+ memset(regionbuffers[5] + i*pagesize, (unsigned char)i, pagesize);
+ }
+ kret = vm_protect(mach_task_self(), (vm_offset_t)regionbuffers[5], regionsizes[5]*pagesize, FALSE, VM_PROT_READ);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_protect of %d pages failed: %d", regionsizes[5], kret);
+ goto fail;
+ }
+
+ // read the last few pagse of the largest buffer and verify its contents
+ {
+ vm_offset_t newdata;
+ mach_msg_type_number_t newcount;
+
+ kret = vm_read(mach_task_self(), (vm_address_t)regionbuffers[5] + (regionsizes[5]-5)*pagesize, 5*pagesize,
+ &newdata, &newcount);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_read of %d pages failed: %d", 5, kret);
+ goto fail;
+ }
+
+ if (0 != memcmp((char *)newdata, regionbuffers[5] + (regionsizes[5]-5)*pagesize,
+ 5*pagesize)) {
+ warnx("vm_read comparison of %d pages failed", 5);
+ kret = -1;
+ vm_deallocate(mach_task_self(), newdata, 5*pagesize);
+ goto fail;
+ }
+
+ kret = vm_deallocate(mach_task_self(), newdata, 5*pagesize);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_deallocate of %d pages failed: %d", 5, kret);
+ goto fail;
+ }
+ }
+
+ // do a list read to repopulate slots 3 and 4
+ {
+ vm_read_entry_t readlist;
+
+ readlist[0].address = (vm_offset_t)regionbuffers[5] + 10*pagesize;
+ readlist[0].size = regionsizes[3]*pagesize;
+ readlist[1].address = (vm_offset_t)regionbuffers[5] + 10*pagesize + regionsizes[3]*pagesize;
+ readlist[1].size = regionsizes[4]*pagesize;
+
+ kret = vm_read_list(mach_task_self(), readlist, 2);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_read_list failed: %d", kret);
+ goto fail;
+ }
+
+ if (0 != memcmp((char *)readlist[0].address, regionbuffers[5] + 10*pagesize,
+ regionsizes[3]*pagesize)) {
+ warnx("vm_read_list comparison of allocation 0 failed");
+ kret = -1;
+ vm_deallocate(mach_task_self(), readlist[0].address, readlist[0].size);
+ vm_deallocate(mach_task_self(), readlist[1].address, readlist[1].size);
+ goto fail;
+ }
+
+ if (0 != memcmp((char *)readlist[1].address, regionbuffers[5] + 10*pagesize + regionsizes[3]*pagesize,
+ regionsizes[4]*pagesize)) {
+ warnx("vm_read_list comparison of allocation 1 failed");
+ kret = -1;
+ vm_deallocate(mach_task_self(), readlist[0].address, readlist[0].size);
+ vm_deallocate(mach_task_self(), readlist[1].address, readlist[1].size);
+ goto fail;
+ }
+
+ regionbuffers[3] = (char *)readlist[0].address;
+ regionbuffers[4] = (char *)readlist[1].address;
+ }
+
+ // do a read_overwrite and copy, which should be about the same
+ {
+ vm_size_t count;
+
+ kret = vm_read_overwrite(mach_task_self(), (vm_offset_t)regionbuffers[3],
+ regionsizes[0]*pagesize,
+ (vm_offset_t)regionbuffers[0],
+ &count);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_read_overwrite of %d pages failed: %d", regionsizes[0], kret);
+ goto fail;
+ }
+
+ kret = vm_copy(mach_task_self(), (vm_offset_t)regionbuffers[0],
+ regionsizes[0]*pagesize,
+ (vm_offset_t)regionbuffers[1]);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_copy of %d pages failed: %d", regionsizes[0], kret);
+ goto fail;
+ }
+
+ if (0 != memcmp(regionbuffers[1], regionbuffers[3],
+ regionsizes[0]*pagesize)) {
+ warnx("vm_read_overwrite/vm_copy comparison failed");
+ kret = -1;
+ goto fail;
+ }
+ }
+
+ // do a vm_copy of our mach-o header and compare. Rosetta doesn't support this, though
+ if (!g_is_under_rosetta) {
+
+ kret = vm_write(mach_task_self(), (vm_address_t)regionbuffers[2],
+ (vm_offset_t)&_mh_execute_header, pagesize);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_write of %d pages failed: %d", 1, kret);
+ goto fail;
+ }
+
+ if (_mh_execute_header.magic != *(uint32_t *)regionbuffers[2]) {
+ warnx("vm_write comparison failed");
+ kret = -1;
+ goto fail;
+ }
+ }
+
+ // check that the vm_protects above worked
+ {
+ vm_address_t addr = (vm_address_t)regionbuffers[5]+7*pagesize;
+ vm_size_t size = pagesize;
+ int _basic[VM_REGION_BASIC_INFO_COUNT];
+ vm_region_basic_info_t basic = (vm_region_basic_info_t)_basic;
+ int _basic64[VM_REGION_BASIC_INFO_COUNT_64];
+ vm_region_basic_info_64_t basic64 = (vm_region_basic_info_64_t)_basic64;
+ mach_msg_type_number_t infocnt;
+ mach_port_t objname;
+
+#if !__LP64__
+ infocnt = VM_REGION_BASIC_INFO_COUNT;
+ kret = vm_region(mach_task_self(), &addr, &size, VM_REGION_BASIC_INFO,
+ (vm_region_info_t)basic, &infocnt, &objname);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_region(VM_REGION_BASIC_INFO) failed: %d", kret);
+ goto fail;
+ }
+ if (VM_REGION_BASIC_INFO_COUNT != infocnt) {
+ warnx("vm_region(VM_REGION_BASIC_INFO) returned a bad info count");
+ kret = -1;
+ goto fail;
+ }
+
+ // when we did the vm_read_list above, it should have split this region into
+ // a 10 page sub-region
+ if (addr != (vm_address_t)regionbuffers[5] || size != 10*pagesize) {
+ warnx("vm_region(VM_REGION_BASIC_INFO) returned a bad region range");
+ kret = -1;
+ goto fail;
+ }
+
+ if (basic->protection != VM_PROT_READ) {
+ warnx("vm_region(VM_REGION_BASIC_INFO) returned a bad protection");
+ kret = -1;
+ goto fail;
+ }
+#endif
+
+ infocnt = VM_REGION_BASIC_INFO_COUNT_64;
+ // intentionally use VM_REGION_BASIC_INFO and get up-converted
+ kret = vm_region_64(mach_task_self(), &addr, &size, VM_REGION_BASIC_INFO,
+ (vm_region_info_t)basic64, &infocnt, &objname);
+ if (kret != KERN_SUCCESS) {
+ warnx("vm_region_64(VM_REGION_BASIC_INFO) failed: %d", kret);
+ goto fail;
+ }
+ if (VM_REGION_BASIC_INFO_COUNT_64 != infocnt) {
+ warnx("vm_region_64(VM_REGION_BASIC_INFO) returned a bad info count");
+ kret = -1;
+ goto fail;
+ }
+
+ // when we did the vm_read_list above, it should have split this region into
+ // a 10 page sub-region
+ if (addr != (vm_address_t)regionbuffers[5] || size != 10*pagesize) {
+ warnx("vm_region_64(VM_REGION_BASIC_INFO) returned a bad region range");
+ kret = -1;
+ goto fail;
+ }
+
+ if (basic64->protection != VM_PROT_READ) {
+ warnx("vm_region_64(VM_REGION_BASIC_INFO) returned a bad protection");
+ kret = -1;
+ goto fail;
+ }
+
+#if !__LP64__
+ // try to compare some stuff. Particularly important for fields after offset
+ if (!g_is_under_rosetta) {
+ if (basic->offset != basic64->offset ||
+ basic->behavior != basic64->behavior ||
+ basic->user_wired_count != basic64->user_wired_count) {
+ warnx("vm_region and vm_region_64 did not agree");
+ kret = -1;
+ goto fail;
+ }
+ }
+#endif
+ }
+
+fail:
+ for (i=0; i < sizeof(regionsizes)/sizeof(regionsizes[0]); i++) {
+ if (regionbuffers[i]) {
+ vm_deallocate(mach_task_self(), (vm_address_t)regionbuffers[i], regionsizes[i]*pagesize);
+ }
+ }
+
+ return kret;
+}
+
projects / apple / xnu.git / blobdiff