test/asan/TestCases/Linux/function-sections-are-bad.cc

   1 // Check that --gc-sections does not throw away (or localize) parts of sanitizer
   2 // interface.
   3 // RUN: %clang_asan %s -Wl,--gc-sections -ldl -o %t
   4 // RUN: %clang_asan %s -DBUILD_SO -fPIC -o %t-so.so -shared
   5 // RUN: %t 2>&1
   6
   7 // REQUIRES: asan-64-bits
   8
   9 #ifndef BUILD_SO
  10 #include <assert.h>
  11 #include <dlfcn.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14
  15 int main(int argc, char *argv[]) {
  16   char path[4096];
  17   snprintf(path, sizeof(path), "%s-so.so", argv[0]);
  18
  19   void *handle = dlopen(path, RTLD_LAZY);
  20   if (!handle) fprintf(stderr, "%s\n", dlerror());
  21   assert(handle != 0);
  22
  23   typedef void (*F)();
  24   F f = (F)dlsym(handle, "call_rtl_from_dso");
  25   printf("%s\n", dlerror());
  26   assert(dlerror() == 0);
  27   f();
  28
  29   dlclose(handle);
  30   return 0;
  31 }
  32
  33 #else // BUILD_SO
  34
  35 #include <sanitizer/asan_interface.h>
  36 extern "C" void call_rtl_from_dso() {
  37   volatile int32_t x;
  38   volatile int32_t y = __sanitizer_unaligned_load32((void *)&x);
  39 }
  40
  41 #endif // BUILD_SO