testing/test-cases/_dyld_register_func_for_add_image.dtest/main.cxx

   1
   2 // BUILD:  $CXX main.cxx -o $BUILD_DIR/dyld_register_test.exe -DRUN_DIR="$RUN_DIR"
   3 // BUILD:  $CC  foo.c -dynamiclib  -install_name $RUN_DIR/libfoo.dylib -o $BUILD_DIR/libfoo.dylib
   4
   5 // RUN:  ./dyld_register_test.exe
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <dlfcn.h>
  10 #include <mach-o/dyld.h>
  11 #include <mach-o/dyld_priv.h>
  12
  13 #include <unordered_set>
  14
  15 #include "test_support.h"
  16
  17 extern mach_header __dso_handle;
  18
  19 static std::unordered_set<const mach_header*> sCurrentImages;
  20
  21 static void notify(const mach_header* mh, intptr_t vmaddr_slide)
  22 {
  23     LOG("mh=%p", mh);
  24     if ( sCurrentImages.count(mh) != 0 ) {
  25         FAIL("notified twice about %p", mh);
  26     }
  27     sCurrentImages.insert(mh);
  28 }
  29
  30
  31 int main(int argc, const char* argv[], const char* envp[], const char* apple[]) {
  32     _dyld_register_func_for_add_image(&notify);
  33
  34     // verify we were notified about already loaded images
  35     if ( sCurrentImages.count(&__dso_handle) == 0 ) {
  36         FAIL("did not notify us about main executable");
  37     }
  38     const mach_header* libSysMH = dyld_image_header_containing_address((void*)&printf);
  39     if ( sCurrentImages.count(libSysMH) == 0 ) {
  40         FAIL("did not notify us about libsystem_c.dylib");    }
  41
  42     void* handle = dlopen(RUN_DIR "/libfoo.dylib", RTLD_FIRST);
  43     if ( handle == NULL ) {
  44         FAIL("dlopen(\"%s\") failed with: %s", RUN_DIR "/libfoo.dylib", dlerror());
  45     }
  46
  47     void* sym = dlsym(handle, "foo");
  48     if ( sym == NULL ) {
  49         FAIL("dlsym(handle, \"foo\") failed");
  50     }
  51
  52     // verify we were notified about load of libfoo.dylib
  53     const mach_header* libfooMH = dyld_image_header_containing_address(sym);
  54     if ( sCurrentImages.count(libfooMH) == 0 ) {
  55                 FAIL("_dyld_register_func_for_add_image() did not notify us about libfoo.dylib");
  56     }
  57
  58         int result = dlclose(handle);
  59         if ( result != 0 ) {
  60         FAIL("dlclose(handle) returned %d", result);
  61         }
  62
  63     PASS("_dyld_register_func_for_add_image");
  64 }
  65