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

   1
   2 // BUILD:  $CC  foo.c -dynamiclib  -install_name $RUN_DIR/libfoo.dylib -o $BUILD_DIR/libfoo.dylib
   3 // BUILD:  $CXX main.cxx -o $BUILD_DIR/dyld_register_test.exe $BUILD_DIR/libfoo.dylib -DRUN_DIR="$RUN_DIR"
   4 // BUILD:  $CC  foo.c -dynamiclib  -install_name $RUN_DIR/libfoo2.dylib -o $BUILD_DIR/libfoo2.dylib
   5 // BUILD:  $CC  foo.c -bundle -o $BUILD_DIR/foo.bundle
   6 // BUILD:  $CC  up.c -dynamiclib  -install_name $RUN_DIR/libup.dylib -o $BUILD_DIR/libup.dylib
   7 // BUILD:  $CC  baz.c -dynamiclib  -install_name $RUN_DIR/libbaz.dylib -o $BUILD_DIR/libbaz.dylib $BUILD_DIR/libup.dylib
   8 // BUILD:  $CC  bar.c -dynamiclib  -install_name $RUN_DIR/libbar.dylib -o $BUILD_DIR/libbar.dylib -Wl,-upward_library,$BUILD_DIR/libup.dylib -DRUN_DIR="$RUN_DIR"
   9
  10 // RUN:  ./dyld_register_test.exe
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <dlfcn.h>
  15 #include <mach-o/dyld.h>
  16 #include <mach-o/dyld_priv.h>
  17
  18 #include <unordered_set>
  19
  20 #include "test_support.h"
  21
  22 extern "C" void foo();
  23
  24 extern mach_header __dso_handle;
  25
  26 static std::unordered_set<const mach_header*> sCurrentImages;
  27 static bool expectedUnloadableState = false;
  28
  29 static void notify(const mach_header* mh, const char* path, bool unloadable)
  30 {
  31     LOG("mh=%p, path=%s, unloadable=%d", mh, path, unloadable);
  32     if ( sCurrentImages.count(mh) != 0 ) {
  33         FAIL("notified twice about %p", mh);
  34     }
  35     sCurrentImages.insert(mh);
  36
  37     const char* leaf = strrchr(path, '/');
  38     if ( unloadable != expectedUnloadableState ) {
  39         FAIL("image incorrectly marked unloadable(%s) but expected unloadable(%s) %p %s",
  40                unloadable ? "true" : "true", expectedUnloadableState ? "true" : "false", mh, path);
  41     }
  42 }
  43
  44
  45 int main(int argc, const char* argv[], const char* envp[], const char* apple[]) {
  46     // Initially all images must not be unloadable as they are directly linked to the main executable
  47     expectedUnloadableState = false;
  48     _dyld_register_for_image_loads(&notify);
  49
  50     // verify we were notified about already loaded images
  51     if ( sCurrentImages.count(&__dso_handle) == 0 ) {
  52         FAIL("did not notify us about main executable");
  53     }
  54     const mach_header* libSysMH = dyld_image_header_containing_address((void*)&printf);
  55     if ( sCurrentImages.count(libSysMH) == 0 ) {
  56         FAIL("did not notify us about libsystem_c.dylib");
  57     }
  58     const mach_header* libFoo = dyld_image_header_containing_address((void*)&foo);
  59     if ( sCurrentImages.count(libFoo) == 0 ) {
  60         FAIL("did not notify us about libfoo.dylib");
  61     }
  62
  63     // These dlopen's can be unloaded
  64     expectedUnloadableState = true;
  65
  66     // verify we were notified about load of libfoo2.dylib
  67     void* handle2 = dlopen(RUN_DIR "/libfoo2.dylib", RTLD_FIRST);
  68     if ( handle2 == NULL ) {
  69         FAIL("dlopen(\"%s\") failed with: %s", RUN_DIR "/libfoo.dylib", dlerror());
  70     }
  71     const void* libfoo2Foo = dlsym(handle2, "foo");
  72     const mach_header* libfoo2MH = dyld_image_header_containing_address(libfoo2Foo);
  73     if ( sCurrentImages.count(libfoo2MH) == 0 ) {
  74         FAIL("did not notify us about libfoo2.dylib");
  75     }
  76
  77     // verify we were notified about load of foo.bundle
  78     void* handleB = dlopen(RUN_DIR "/foo.bundle", RTLD_FIRST);
  79     if ( handleB == NULL ) {
  80         FAIL("dlopen(\"%s\") failed with: %s", RUN_DIR "/foo.bundle", dlerror());
  81     }
  82     const void* libfooBFoo = dlsym(handle2, "foo");
  83     const mach_header* libfooB = dyld_image_header_containing_address(libfooBFoo);
  84     if ( sCurrentImages.count(libfooB) == 0 ) {
  85         FAIL("_dyld_register_for_image_loads() did not notify us about foo.bundle");
  86     }
  87
  88     // Upward linking with dlopen may confuse the notifier as we may try to notify twice on the upwardly linked image
  89     // We test this with:
  90     //   libbar upward links libup
  91     //   libbar also dlopens libbaz
  92     //   libbaz links libup
  93     // We should not get a duplicate notification on libup
  94     void* handleBar = dlopen(RUN_DIR "/libbar.dylib", RTLD_FIRST);
  95     if ( handleBar == NULL ) {
  96         FAIL("dlopen(\"%s\") failed with: %s", RUN_DIR "/libbar.dylib", dlerror());
  97     }
  98
  99     PASS("Success");
 100 }
 101