| // This test requires operator new to be intercepted by the hwasan runtime, |
| // so we need to avoid linking against libc++. |
| // RUN: %clangxx_hwasan %s -nostdlib++ -lstdc++ -o %t |
| // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-max |
| // RUN: %env_hwasan_opts=allocator_may_return_null=1 %run %t malloc 2>&1 |
| // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t malloc max 2>&1 | FileCheck %s --check-prefix=CHECK-max |
| // RUN: %env_hwasan_opts=allocator_may_return_null=1 %run %t malloc max 2>&1 |
| // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-calloc |
| // RUN: %env_hwasan_opts=allocator_may_return_null=1 %run %t calloc 2>&1 |
| // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t reallocarray 2>&1 | FileCheck %s --check-prefix=CHECK-reallocarray |
| // RUN: %env_hwasan_opts=allocator_may_return_null=1 %run %t reallocarray 2>&1 |
| // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new 2>&1 | FileCheck %s --check-prefix=CHECK-max |
| // RUN: %env_hwasan_opts=allocator_may_return_null=1 not %run %t new 2>&1 | FileCheck %s --check-prefix=CHECK-oom |
| // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new max 2>&1 | FileCheck %s --check-prefix=CHECK-max |
| // RUN: %env_hwasan_opts=allocator_may_return_null=1 not %run %t new max 2>&1 | FileCheck %s --check-prefix=CHECK-oom |
| // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new-nothrow 2>&1 | FileCheck %s --check-prefix=CHECK-max |
| // RUN: %env_hwasan_opts=allocator_may_return_null=1 %run %t new-nothrow 2>&1 |
| // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new-nothrow max 2>&1 | FileCheck %s --check-prefix=CHECK-max |
| // RUN: %env_hwasan_opts=allocator_may_return_null=1 %run %t new-nothrow max 2>&1 |
| // RUN: %run %t usable 2>&1 |
| |
| // Tests for various edge cases related to sizes, notably the maximum size the |
| // allocator can allocate. Tests that an integer overflow in the parameters of |
| // calloc is caught. |
| |
| #include <assert.h> |
| #include <malloc.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <limits> |
| #include <new> |
| |
| #include <sanitizer/allocator_interface.h> |
| #include <sanitizer/hwasan_interface.h> |
| |
| #include "utils.h" |
| |
| int main(int argc, char **argv) { |
| assert(argc <= 3); |
| bool test_size_max = argc == 3 && !untag_strcmp(argv[2], "max"); |
| |
| static const size_t kMaxAllowedMallocSize = 1ULL << 40; |
| static const size_t kChunkHeaderSize = 16; |
| |
| size_t MallocSize = test_size_max ? std::numeric_limits<size_t>::max() |
| : (kMaxAllowedMallocSize + 1); |
| |
| if (!untag_strcmp(argv[1], "malloc")) { |
| void *p = malloc(MallocSize); |
| assert(!p); |
| } else if (!untag_strcmp(argv[1], "calloc")) { |
| // Trigger an overflow in calloc. |
| size_t size = std::numeric_limits<size_t>::max(); |
| void *p = calloc((size / 0x1000) + 1, 0x1000); |
| assert(!p); |
| } else if (!untag_strcmp(argv[1], "reallocarray")) { |
| // Trigger an overflow in reallocarray. |
| size_t size = std::numeric_limits<size_t>::max(); |
| void *p = __sanitizer_reallocarray(nullptr, (size / 0x1000) + 1, 0x1000); |
| assert(!p); |
| } else if (!untag_strcmp(argv[1], "new")) { |
| void *p = operator new(MallocSize); |
| assert(!p); |
| } else if (!untag_strcmp(argv[1], "new-nothrow")) { |
| void *p = operator new(MallocSize, std::nothrow); |
| assert(!p); |
| } else if (!untag_strcmp(argv[1], "usable")) { |
| // Playing with the actual usable size of a chunk. |
| void *p = malloc(1007); |
| assert(p); |
| size_t size = __sanitizer_get_allocated_size(p); |
| assert(size >= 1007); |
| memset(p, 'A', size); |
| p = realloc(p, 2014); |
| assert(p); |
| size = __sanitizer_get_allocated_size(p); |
| assert(size >= 2014); |
| memset(p, 'B', size); |
| free(p); |
| } else { |
| assert(0); |
| } |
| |
| return 0; |
| } |
| |
| // CHECK-max: {{ERROR: HWAddressSanitizer: requested allocation size .* exceeds maximum supported size}} |
| // CHECK-oom: ERROR: HWAddressSanitizer: allocator is out of memory |
| // CHECK-calloc: ERROR: HWAddressSanitizer: calloc parameters overflow |
| // CHECK-reallocarray: ERROR: HWAddressSanitizer: reallocarray parameters overflow |