lib/asan/lit_tests/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 -m64 %s -Wl,--gc-sections -o %t
   4 // RUN: %clang_asan -m64 %s -DBUILD_SO -fPIC -o %t-so.so -shared
   5 // RUN: %t 2>&1
   6
   7 #ifndef BUILD_SO
   8 #include <assert.h>
   9 #include <dlfcn.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12
  13 int main(int argc, char *argv[]) {
  14   char path[4096];
  15   snprintf(path, sizeof(path), "%s-so.so", argv[0]);
  16
  17   void *handle = dlopen(path, RTLD_LAZY);
  18   if (!handle) fprintf(stderr, "%s\n", dlerror());
  19   assert(handle != 0);
  20
  21   typedef void (*F)();
  22   F f = (F)dlsym(handle, "call_rtl_from_dso");
  23   printf("%s\n", dlerror());
  24   assert(dlerror() == 0);
  25   f();
  26
  27   dlclose(handle);
  28   return 0;
  29 }
  30
  31 #else // BUILD_SO
  32
  33 #include <sanitizer/msan_interface.h>
  34 extern "C" void call_rtl_from_dso() {
  35   volatile int32_t x;
  36   volatile int32_t y = __sanitizer_unaligned_load32((void *)&x);
  37 }
  38
  39 #endif // BUILD_SO