1// RUN: %clangxx -g -O0 %s -o %t
2
3// Check that trying to dlopen() the ASan dylib fails.
4// We explictly set `abort_on_error=0` because
5// - By default the lit config sets this but we don't want this
6// test to implicitly depend on this.
7// - It avoids requiring `--crash` to be passed to `not`.
8// RUN: APPLE_ASAN_INIT_FOR_DLOPEN=0 %env_asan_opts=abort_on_error=0 not \
9// RUN: %run %t %shared_libasan 2>&1 | \
10// RUN: FileCheck -check-prefix=CHECK-DL-OPEN-FAIL %s
11// RUN: env -u APPLE_ASAN_INIT_FOR_DLOPEN %env_asan_opts=abort_on_error=0 not \
12// RUN: %run %t %shared_libasan 2>&1 | \
13// RUN: FileCheck -check-prefix=CHECK-DL-OPEN-FAIL %s
14
15// Check that we can successfully dlopen the ASan dylib when we set the right
16// environment variable.
17// RUN: env APPLE_ASAN_INIT_FOR_DLOPEN=1 %run %t %shared_libasan 2>&1 | \
18// RUN: FileCheck -check-prefix=CHECK-DL-OPEN-SUCCESS %s
19
20#include <dlfcn.h>
21#include <stdio.h>
22
23// CHECK-DL-OPEN-FAIL: ERROR: Interceptors are not working
24// CHECK-SAME-DL-OPEN-FAIL: Please launch the executable with: DYLD_INSERT_LIBRARIES={{.+}}/libclang_rt.asan_{{.+}}_dynamic.dylib
25
26int main(int argc, char **argv) {
27 if (argc != 2) {
28 fprintf(stderr, format: "Usage: %s <dylib_path>\n", argv[0]);
29 return 1;
30 }
31 const char *dylib_path = argv[1];
32 void *handle = dlopen(file: dylib_path, RTLD_LAZY);
33 if (!handle) {
34 fprintf(stderr, format: "Failed to dlopen: %s\n", dlerror());
35 return 1;
36 }
37 // Make sure we can find a function we expect to be in the dylib.
38 void *fn = dlsym(handle: handle, name: "__sanitizer_mz_size");
39 if (!fn) {
40 fprintf(stderr, format: "Failed to get symbol: %s\n", dlerror());
41 return 1;
42 }
43 // TODO(dliew): Actually call a function from the dylib that is safe to call.
44 // CHECK-DL-OPEN-SUCCESS: DONE
45 printf(format: "DONE\n");
46 return 0;
47}
48

source code of compiler-rt/test/asan/TestCases/Darwin/init_for_dlopen.cpp