Pirama Arumuga Nainar | 799172d | 2016-03-03 15:50:30 -0800 | [diff] [blame^] | 1 | // Test that __msan_copy_shadow copies shadow, updates origin and does not touch |
| 2 | // the application memory. |
| 3 | // RUN: %clangxx_msan -fsanitize-memory-track-origins=0 -O0 %s -o %t && not %run %t 2>&1 |
| 4 | // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s |
| 5 | |
| 6 | #include <assert.h> |
| 7 | #include <string.h> |
| 8 | #include <sanitizer/msan_interface.h> |
| 9 | |
| 10 | int main() { |
| 11 | char *a = new char[4]; |
| 12 | char *b = new char[4]; |
| 13 | a[1] = 1; |
| 14 | a[3] = 2; |
| 15 | memset(b, 42, 4); |
| 16 | |
| 17 | // Test that __msan_copy_shadow does not touch the contents of b[]. |
| 18 | __msan_copy_shadow(b, a, 4); |
| 19 | __msan_unpoison(b, 4); |
| 20 | assert(b[0] == 42 && b[1] == 42 && b[2] == 42 && b[3] == 42); |
| 21 | |
| 22 | // Test that __msan_copy_shadow correctly updates shadow and origin of b[]. |
| 23 | __msan_copy_shadow(b, a, 4); |
| 24 | assert(__msan_test_shadow(b, 4) == 0); |
| 25 | assert(__msan_test_shadow(b + 1, 3) == 1); |
| 26 | assert(__msan_test_shadow(b + 3, 1) == -1); |
| 27 | __msan_check_mem_is_initialized(b, 4); |
| 28 | // CHECK: use-of-uninitialized-value |
| 29 | // CHECK: {{in main.*msan_copy_shadow.cc:}}[[@LINE-2]] |
| 30 | // CHECK: Uninitialized value was stored to memory at |
| 31 | // CHECK: {{in main.*msan_copy_shadow.cc:}}[[@LINE-8]] |
| 32 | // CHECK: Uninitialized value was created by a heap allocation |
| 33 | // CHECK: {{in main.*msan_copy_shadow.cc:}}[[@LINE-22]] |
| 34 | } |