compiler-rt/test/asan/TestCases/Darwin/init_for_dlopen.cpp

   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
  26 int main(int argc, char **argv) {
  27   if (argc != 2) {
  28     fprintf(stderr, "Usage: %s <dylib_path>\n", argv[0]);
  29     return 1;
  30   }
  31   const char *dylib_path = argv[1];
  32   void *handle = dlopen(dylib_path, RTLD_LAZY);
  33   if (!handle) {
  34     fprintf(stderr, "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, "__sanitizer_mz_size");
  39   if (!fn) {
  40     fprintf(stderr, "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("DONE\n");
  46   return 0;
  47 }