Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 1 | // Test the behavior of malloc/calloc/realloc when the allocation size is huge. |
| 2 | // By default (allocator_may_return_null=0) the process should crash. |
| 3 | // With allocator_may_return_null=1 the allocator should return 0. |
| 4 | // |
| 5 | // RUN: %clangxx_asan -O0 %s -o %t |
| 6 | // RUN: not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH |
Pirama Arumuga Nainar | 799172d | 2016-03-03 15:50:30 -0800 | [diff] [blame^] | 7 | // RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH |
| 8 | // RUN: %env_asan_opts=allocator_may_return_null=1 %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mNULL |
| 9 | // RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cCRASH |
| 10 | // RUN: %env_asan_opts=allocator_may_return_null=1 %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cNULL |
| 11 | // RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coCRASH |
| 12 | // RUN: %env_asan_opts=allocator_may_return_null=1 %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coNULL |
| 13 | // RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rCRASH |
| 14 | // RUN: %env_asan_opts=allocator_may_return_null=1 %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rNULL |
| 15 | // RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrCRASH |
| 16 | // RUN: %env_asan_opts=allocator_may_return_null=1 %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrNULL |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 17 | |
| 18 | #include <limits.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 21 | #include <stdio.h> |
| 22 | #include <assert.h> |
| 23 | #include <limits> |
| 24 | int main(int argc, char **argv) { |
Pirama Arumuga Nainar | 799172d | 2016-03-03 15:50:30 -0800 | [diff] [blame^] | 25 | // Disable stderr buffering. Needed on Windows. |
| 26 | setvbuf(stderr, NULL, _IONBF, 0); |
| 27 | |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 28 | volatile size_t size = std::numeric_limits<size_t>::max() - 10000; |
| 29 | assert(argc == 2); |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 30 | void *x = 0; |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 31 | if (!strcmp(argv[1], "malloc")) { |
| 32 | fprintf(stderr, "malloc:\n"); |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 33 | x = malloc(size); |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 34 | } |
| 35 | if (!strcmp(argv[1], "calloc")) { |
| 36 | fprintf(stderr, "calloc:\n"); |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 37 | x = calloc(size / 4, 4); |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 38 | } |
| 39 | |
| 40 | if (!strcmp(argv[1], "calloc-overflow")) { |
| 41 | fprintf(stderr, "calloc-overflow:\n"); |
| 42 | volatile size_t kMaxSizeT = std::numeric_limits<size_t>::max(); |
| 43 | size_t kArraySize = 4096; |
| 44 | volatile size_t kArraySize2 = kMaxSizeT / kArraySize + 10; |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 45 | x = calloc(kArraySize, kArraySize2); |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 46 | } |
| 47 | |
| 48 | if (!strcmp(argv[1], "realloc")) { |
| 49 | fprintf(stderr, "realloc:\n"); |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 50 | x = realloc(0, size); |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 51 | } |
| 52 | if (!strcmp(argv[1], "realloc-after-malloc")) { |
| 53 | fprintf(stderr, "realloc-after-malloc:\n"); |
| 54 | char *t = (char*)malloc(100); |
| 55 | *t = 42; |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 56 | x = realloc(t, size); |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 57 | assert(*t == 42); |
| 58 | free(t); |
| 59 | } |
| 60 | // The NULL pointer is printed differently on different systems, while (long)0 |
| 61 | // is always the same. |
| 62 | fprintf(stderr, "x: %lx\n", (long)x); |
| 63 | free(x); |
| 64 | return x != 0; |
| 65 | } |
| 66 | // CHECK-mCRASH: malloc: |
| 67 | // CHECK-mCRASH: AddressSanitizer's allocator is terminating the process |
| 68 | // CHECK-cCRASH: calloc: |
| 69 | // CHECK-cCRASH: AddressSanitizer's allocator is terminating the process |
| 70 | // CHECK-coCRASH: calloc-overflow: |
| 71 | // CHECK-coCRASH: AddressSanitizer's allocator is terminating the process |
| 72 | // CHECK-rCRASH: realloc: |
| 73 | // CHECK-rCRASH: AddressSanitizer's allocator is terminating the process |
| 74 | // CHECK-mrCRASH: realloc-after-malloc: |
| 75 | // CHECK-mrCRASH: AddressSanitizer's allocator is terminating the process |
| 76 | |
| 77 | // CHECK-mNULL: malloc: |
| 78 | // CHECK-mNULL: x: 0 |
| 79 | // CHECK-cNULL: calloc: |
| 80 | // CHECK-cNULL: x: 0 |
| 81 | // CHECK-coNULL: calloc-overflow: |
| 82 | // CHECK-coNULL: x: 0 |
| 83 | // CHECK-rNULL: realloc: |
| 84 | // CHECK-rNULL: x: 0 |
| 85 | // CHECK-mrNULL: realloc-after-malloc: |
| 86 | // CHECK-mrNULL: x: 0 |