1// Test for ASAN_OPTIONS=start_deactivated=1 mode.
2// Main executable is uninstrumented, but linked to ASan runtime. The shared
3// library is instrumented. Memory errors before dlopen are not detected.
4
5// RUN: %clangxx_asan -O0 -DSHARED_LIB %s -fPIC -shared -o %t-so.so
6// RUN: %clangxx -O0 %s -c -o %t.o
7// RUN: %clangxx_asan -O0 %t.o -ldl -o %t
8// RUN: ASAN_OPTIONS=start_deactivated=1 not %run %t 2>&1 | FileCheck %s
9// XFAIL: arm-linux-gnueabi
10
11#if !defined(SHARED_LIB)
12#include <dlfcn.h>
13#include <stdio.h>
14#include <stdlib.h>
15#include <string.h>
16#include <unistd.h>
17
18#include <string>
19
20#include "sanitizer/asan_interface.h"
21
22void test_malloc_shadow() {
23  char *p = (char *)malloc(100);
24  char *q = (char *)__asan_region_is_poisoned(p + 95, 8);
25  fprintf(stderr, "=%zd=\n", q ? q - (p + 95) : -1);
26  free(p);
27}
28
29typedef void (*Fn)();
30
31int main(int argc, char *argv[]) {
32  test_malloc_shadow();
33  // CHECK: =-1=
34
35  std::string path = std::string(argv[0]) + "-so.so";
36  void *dso = dlopen(path.c_str(), RTLD_NOW);
37  if (!dso) {
38    fprintf(stderr, "dlopen failed: %s\n", dlerror());
39    return 1;
40  }
41
42  test_malloc_shadow();
43  // CHECK: =5=
44
45  void *fn = dlsym(dso, "do_another_bad_thing");
46  if (!fn) {
47    fprintf(stderr, "dlsym failed: %s\n", dlerror());
48    return 1;
49  }
50
51  ((Fn)fn)();
52  // CHECK: AddressSanitizer: heap-buffer-overflow
53  // CHECK: READ of size 1
54  // CHECK: {{#0 .* in do_another_bad_thing}}
55  // CHECK: is located 5 bytes to the right of 100-byte region
56  // CHECK: in do_another_bad_thing
57
58  return 0;
59}
60#else  // SHARED_LIB
61#include <stdio.h>
62#include <stdlib.h>
63
64extern "C" void do_another_bad_thing() {
65  char *volatile p = (char *)malloc(100);
66  printf("%hhx\n", p[105]);
67}
68#endif  // SHARED_LIB
69