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
test_malloc_shadow()22 void 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
29 typedef void (*Fn)();
30
main(int argc,char * argv[])31 int 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
do_another_bad_thing()64 extern "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