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: %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
15int 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>
36extern "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
42