testing/test-cases/_dyld_register_for_bulk_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_bulk_test.exe $BUILD_DIR/libfoo.dylib -DRUN_DIR="$RUN_DIR"
   4 // BUILD:  $CC  foo.c -dynamiclib  -install_name $RUN_DIR/libfoo2.dylib -lz -o $BUILD_DIR/libfoo2.dylib
   5 // BUILD:  $CC  up.c -dynamiclib  -install_name $RUN_DIR/libup.dylib -o $BUILD_DIR/libup.dylib
   6 // BUILD:  $CC  baz.c -dynamiclib  -install_name $RUN_DIR/libbaz.dylib -o $BUILD_DIR/libbaz.dylib $BUILD_DIR/libup.dylib
   7 // 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"
   8
   9 // RUN:  ./dyld_register_bulk_test.exe
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <dlfcn.h>
  14 #include <mach-o/dyld.h>
  15 #include <mach-o/dyld_priv.h>
  16
  17 #include <unordered_set>
  18
  19 #include "test_support.h"
  20
  21 extern "C" void foo();
  22
  23 extern mach_header __dso_handle;
  24
  25 static std::unordered_set<const mach_header*> sCurrentImages;
  26
  27 static void notify(unsigned count, const mach_header* mhs[], const char* paths[])
  28 {
  29     LOG("notification:");
  30     for (unsigned i=0; i < count; ++i) {
  31         const mach_header* mh   = mhs[i];
  32         const char*        path = paths[i];
  33         LOG("  %3d  mh=%p, path=%s", i, mh, path);
  34         if ( sCurrentImages.count(mh) != 0 ) {
  35             FAIL("notified twice about %p", mh);
  36             exit(0);
  37         }
  38         sCurrentImages.insert(mh);
  39     }
  40 }
  41
  42
  43 int main(int argc, const char* argv[], const char* envp[], const char* apple[]) {
  44     _dyld_register_for_bulk_image_loads(&notify);
  45
  46     // verify we were notified about already loaded images
  47     if ( sCurrentImages.count(&__dso_handle) == 0 ) {
  48         FAIL("did not notify us about main executable");
  49     }
  50     const mach_header* libSysMH = dyld_image_header_containing_address((void*)&printf);
  51     if ( sCurrentImages.count(libSysMH) == 0 ) {
  52         FAIL("did not notify us about libsystem_c.dylib");
  53     }
  54     const mach_header* libFoo = dyld_image_header_containing_address((void*)&foo);
  55     if ( sCurrentImages.count(libFoo) == 0 ) {
  56         FAIL("did not notify us about libfoo.dylib");
  57     }
  58
  59     // verify we were notified about load of libfoo2.dylib and libz.dylib
  60     void* handle2 = dlopen(RUN_DIR "/libfoo2.dylib", RTLD_FIRST);
  61     if ( handle2 == NULL ) {
  62         FAIL("dlopen(\"%s\") failed with: %s", RUN_DIR "/libfoo.dylib", dlerror());
  63     }
  64     const void* libfoo2Foo = dlsym(handle2, "foo");
  65     const mach_header* libfoo2MH = dyld_image_header_containing_address(libfoo2Foo);
  66     if ( sCurrentImages.count(libfoo2MH) == 0 ) {
  67         FAIL("did not notify us about libfoo2.dylib");
  68     }
  69     const void* inflateSym = dlsym(RTLD_DEFAULT, "inflate");
  70     if ( inflateSym == NULL ) {
  71        FAIL("did not load libz.dylib");
  72     }
  73     const mach_header* libzMH = dyld_image_header_containing_address(inflateSym);
  74     if ( sCurrentImages.count(libzMH) == 0 ) {
  75         FAIL("did not notify us about libz.dylib");
  76     }
  77
  78     // Upward linking with dlopen may confuse the notifier as we may try to notify twice on the upwardly linked image
  79     // We test this with:
  80     //   libbar upward links libup
  81     //   libbar also dlopens libbaz
  82     //   libbaz links libup
  83     // We should not get a duplicate notification on libup
  84     void* handleBar = dlopen(RUN_DIR "/libbar.dylib", RTLD_FIRST);
  85     if ( handleBar == NULL ) {
  86         FAIL("dlopen(\"%s\") failed with: %s", RUN_DIR "/libbar.dylib", dlerror());
  87     }
  88
  89     PASS("SUuccess");
  90 }
  91