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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