testing/test-cases/image_infos-uuids.dtest/main.c

   1
   2 // BUILD:  $CC foo.c -bundle     -o $BUILD_DIR/test.bundle
   3 // BUILD:  $CC main.c            -o $BUILD_DIR/image-list-uuid.exe -DRUN_DIR="$RUN_DIR"
   4
   5 // RUN:  ./image-list-uuid.exe
   6
   7
   8 #include <stdio.h>
   9 #include <dlfcn.h>
  10 #include <mach-o/loader.h>
  11 #include <mach-o/dyld_images.h>
  12 #include <uuid/uuid.h>
  13
  14 #include "test_support.h"
  15
  16 extern const struct mach_header __dso_handle;
  17
  18 static void printUUIDs(const struct dyld_all_image_infos* infos)
  19 {
  20     if ( infos->uuidArray != NULL ) {
  21         for (int i=0; i < infos->uuidArrayCount; ++i) {
  22             const struct dyld_uuid_info* nonCacheInfo = &infos->uuidArray[i];
  23             uuid_string_t uuidStr;
  24             uuid_unparse_upper(nonCacheInfo->imageUUID, uuidStr);
  25             LOG("%p %s", nonCacheInfo->imageLoadAddress, uuidStr);
  26           }
  27     }
  28 }
  29
  30 int main(int argc, const char* argv[], const char* envp[], const char* apple[]) {
  31     // NOTE: dyld_all_image_infos is private, but currently looked at by kernel during stackshots
  32     // This test is to validate that the data available to the kernel is correct
  33
  34     task_dyld_info_data_t task_dyld_info;
  35     mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT;
  36     if ( task_info(mach_task_self(), TASK_DYLD_INFO, (task_info_t)&task_dyld_info, &count) ) {
  37         FAIL("task_info() failed");
  38     }
  39     const struct dyld_all_image_infos* infos = (struct dyld_all_image_infos*)(uintptr_t)task_dyld_info.all_image_info_addr;
  40
  41
  42     if ( infos->uuidArray == NULL ) {
  43         FAIL("infos->uuidArray == NULL");
  44     }
  45     if ( infos->uuidArrayCount < 2 ) {
  46         // expect to contain main executable and dyld
  47         FAIL("infos->uuidArrayCount != 2 (is %lu)", infos->uuidArrayCount);
  48     }
  49     printUUIDs(infos);
  50     uint32_t initialCount = infos->uuidArrayCount;
  51
  52     bool foundMain = false;
  53     bool foundDyld = false;
  54     for (int i=0; i < infos->uuidArrayCount; ++i) {
  55         const struct dyld_uuid_info* nonCacheInfo = &infos->uuidArray[i];
  56         if ( nonCacheInfo->imageLoadAddress == &__dso_handle )
  57             foundMain = true;
  58         if ( nonCacheInfo->imageLoadAddress->filetype == MH_DYLINKER )
  59             foundDyld = true;
  60     }
  61     if ( !foundMain ) {
  62         FAIL("image_infos-uuids uuid array does not contain main program");
  63     }
  64     if ( !foundDyld ) {
  65         FAIL("image_infos-uuids uuid array does not contain dyld");
  66     }
  67
  68     void* handle = dlopen(RUN_DIR "/test.bundle", RTLD_LAZY);
  69     if ( handle == NULL ) {
  70         FAIL("image_infos-uuids %s", dlerror());
  71     }
  72     LOG("loaded test.bundle");
  73
  74     // now expect UUID list to be three
  75     if ( infos->uuidArrayCount != initialCount+1 ) {
  76         // expect to contain main executable and dyld
  77         FAIL("infos->uuidArrayCount was not incremented (is %lu)", infos->uuidArrayCount);
  78     }
  79     printUUIDs(infos);
  80
  81     PASS("Success");
  82 }
  83