1 | // Regression test for https://github.com/google/sanitizers/issues/691 |
2 | |
3 | // RUN: %clangxx_asan -O0 %s -o %t -fstack-protector |
4 | // RUN: %run %t 1 2>&1 | FileCheck %s |
5 | // RUN: %run %t 2 2>&1 | FileCheck %s |
6 | |
7 | #include <stdio.h> |
8 | #include <string.h> |
9 | #include <stdlib.h> |
10 | |
11 | // MSVC provides _alloca instead of alloca. |
12 | #if defined(_MSC_VER) && !defined(alloca) |
13 | # define alloca _alloca |
14 | #endif |
15 | |
16 | #if defined(__sun__) && defined(__svr4__) |
17 | #include <alloca.h> |
18 | #endif |
19 | |
20 | |
21 | void f1_alloca() { |
22 | char *dynamic_buffer = (char *)alloca(200); |
23 | fprintf(stderr, format: "dynamic_buffer = %p\n" , dynamic_buffer); |
24 | memset(s: dynamic_buffer, c: 'y', n: 200); |
25 | return; |
26 | } |
27 | |
28 | static const int kDynamicArraySize = 200; |
29 | |
30 | void f1_vla() { |
31 | char dynamic_buffer[kDynamicArraySize]; |
32 | fprintf(stderr, format: "dynamic_buffer = %p\n" , dynamic_buffer); |
33 | memset(s: dynamic_buffer, c: 'y', n: kDynamicArraySize); |
34 | return; |
35 | } |
36 | |
37 | void f2() { |
38 | char buf[1024]; |
39 | memset(s: buf, c: 'x', n: 1024); |
40 | } |
41 | |
42 | int main(int argc, const char *argv[]) { |
43 | if (!strcmp(s1: argv[1], s2: "1" )) { |
44 | f1_alloca(); |
45 | } else if (!strcmp(s1: argv[1], s2: "2" )) { |
46 | f1_vla(); |
47 | } |
48 | f2(); |
49 | fprintf(stderr, format: "Done.\n" ); |
50 | return 0; |
51 | } |
52 | |
53 | // CHECK-NOT: ERROR: AddressSanitizer |
54 | // CHECK: Done. |
55 | |