| 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 | #ifdef _MSC_VER |
| 11 | # include <malloc.h> |
| 12 | #endif |
| 13 | |
| 14 | // MSVC provides _alloca instead of alloca. |
| 15 | #if defined(_MSC_VER) && !defined(alloca) |
| 16 | # define alloca _alloca |
| 17 | #endif |
| 18 | |
| 19 | #if defined(__sun__) && defined(__svr4__) |
| 20 | #include <alloca.h> |
| 21 | #endif |
| 22 | |
| 23 | |
| 24 | void f1_alloca() { |
| 25 | char *dynamic_buffer = (char *)alloca(200); |
| 26 | fprintf(stderr, format: "dynamic_buffer = %p\n", dynamic_buffer); |
| 27 | memset(s: dynamic_buffer, c: 'y', n: 200); |
| 28 | return; |
| 29 | } |
| 30 | |
| 31 | static const int kDynamicArraySize = 200; |
| 32 | |
| 33 | void f1_vla() { |
| 34 | char dynamic_buffer[kDynamicArraySize]; |
| 35 | fprintf(stderr, format: "dynamic_buffer = %p\n", dynamic_buffer); |
| 36 | memset(s: dynamic_buffer, c: 'y', n: kDynamicArraySize); |
| 37 | return; |
| 38 | } |
| 39 | |
| 40 | void f2() { |
| 41 | char buf[1024]; |
| 42 | memset(s: buf, c: 'x', n: 1024); |
| 43 | } |
| 44 | |
| 45 | int main(int argc, const char *argv[]) { |
| 46 | if (!strcmp(s1: argv[1], s2: "1")) { |
| 47 | f1_alloca(); |
| 48 | } else if (!strcmp(s1: argv[1], s2: "2")) { |
| 49 | f1_vla(); |
| 50 | } |
| 51 | f2(); |
| 52 | fprintf(stderr, format: "Done.\n"); |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | // CHECK-NOT: ERROR: AddressSanitizer |
| 57 | // CHECK: Done. |
| 58 |