| // Test the behavior of malloc/calloc/realloc when the allocation causes OOM |
| // in the secondary allocator. |
| // By default (allocator_may_return_null=0) the process should crash. |
| // With allocator_may_return_null=1 the allocator should return 0. |
| // Set the limit to 20.5T on 64 bits to account for ASan shadow memory, |
| // allocator buffers etc. so that the test allocation of ~1T will trigger OOM. |
| // Limit this test to Linux since we're relying on allocator internal |
| // limits (shadow memory size, allocation limits etc.) |
| |
| // RUN: %clangxx_asan -O0 %s -o %t |
| // RUN: ulimit -v 22024290304 |
| // RUN: not %run %t malloc 2>&1 \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK-MALLOC,CHECK-CRASH |
| // RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t malloc 2>&1 \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK-MALLOC,CHECK-CRASH |
| // RUN: %env_asan_opts=allocator_may_return_null=1 %run %t malloc 2>&1 \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK-MALLOC,CHECK-NULL |
| // RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t calloc 2>&1 \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK-CALLOC,CHECK-CRASH |
| // RUN: %env_asan_opts=allocator_may_return_null=1 %run %t calloc 2>&1 \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK-CALLOC,CHECK-NULL |
| // RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t realloc 2>&1 \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK-REALLOC,CHECK-CRASH |
| // RUN: %env_asan_opts=allocator_may_return_null=1 %run %t realloc 2>&1 \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK-REALLOC,CHECK-NULL |
| // RUN: %env_asan_opts=allocator_may_return_null=0 not %run %t realloc-after-malloc 2>&1 \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK-MALLOC-REALLOC,CHECK-CRASH |
| // RUN: %env_asan_opts=allocator_may_return_null=1 %run %t realloc-after-malloc 2>&1 \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK-MALLOC-REALLOC,CHECK-NULL |
| |
| // ASan shadow memory on s390 is too large for this test. |
| // AArch64 bots fail on this test. |
| // TODO(alekseys): Android lit do not run ulimit on device. |
| // REQUIRES: shadow-scale-3 |
| // UNSUPPORTED: s390,android,aarch64 |
| |
| #include <stdlib.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <assert.h> |
| |
| int main(int argc, char **argv) { |
| assert(argc == 2); |
| const char *action = argv[1]; |
| fprintf(stderr, "%s:\n", action); |
| |
| // Allocate just a bit less than max allocation size enforced by ASan's |
| // allocator (currently 1T and 3G). |
| const size_t size = |
| #if __LP64__ |
| (1ULL << 40) - (1ULL << 30); |
| #else |
| (3ULL << 30) - (1ULL << 20); |
| #endif |
| |
| void *x = 0; |
| |
| if (!strcmp(action, "malloc")) { |
| x = malloc(size); |
| } else if (!strcmp(action, "calloc")) { |
| x = calloc(size / 4, 4); |
| } else if (!strcmp(action, "realloc")) { |
| x = realloc(0, size); |
| } else if (!strcmp(action, "realloc-after-malloc")) { |
| char *t = (char*)malloc(100); |
| *t = 42; |
| x = realloc(t, size); |
| assert(*t == 42); |
| free(t); |
| } else { |
| assert(0); |
| } |
| |
| // The NULL pointer is printed differently on different systems, while (long)0 |
| // is always the same. |
| fprintf(stderr, "x: %lx\n", (long)x); |
| free(x); |
| |
| return x != 0; |
| } |
| |
| // CHECK-MALLOC: malloc: |
| // CHECK-CALLOC: calloc: |
| // CHECK-REALLOC: realloc: |
| // CHECK-MALLOC-REALLOC: realloc-after-malloc: |
| |
| // CHECK-CRASH: SUMMARY: AddressSanitizer: out-of-memory |
| // CHECK-NULL: x: 0 |