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 7// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH 8// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mNULL 9// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cCRASH 10// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cNULL 11// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coCRASH 12// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coNULL 13// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rCRASH 14// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rNULL 15// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrCRASH 16// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrNULL 17 18#include <limits.h> 19#include <stdlib.h> 20#include <string.h> 21#include <stdio.h> 22#include <assert.h> 23#include <limits> 24int main(int argc, char **argv) { 25 volatile size_t size = std::numeric_limits<size_t>::max() - 10000; 26 assert(argc == 2); 27 char *x = 0; 28 if (!strcmp(argv[1], "malloc")) { 29 fprintf(stderr, "malloc:\n"); 30 x = (char*)malloc(size); 31 } 32 if (!strcmp(argv[1], "calloc")) { 33 fprintf(stderr, "calloc:\n"); 34 x = (char*)calloc(size / 4, 4); 35 } 36 37 if (!strcmp(argv[1], "calloc-overflow")) { 38 fprintf(stderr, "calloc-overflow:\n"); 39 volatile size_t kMaxSizeT = std::numeric_limits<size_t>::max(); 40 size_t kArraySize = 4096; 41 volatile size_t kArraySize2 = kMaxSizeT / kArraySize + 10; 42 x = (char*)calloc(kArraySize, kArraySize2); 43 } 44 45 if (!strcmp(argv[1], "realloc")) { 46 fprintf(stderr, "realloc:\n"); 47 x = (char*)realloc(0, size); 48 } 49 if (!strcmp(argv[1], "realloc-after-malloc")) { 50 fprintf(stderr, "realloc-after-malloc:\n"); 51 char *t = (char*)malloc(100); 52 *t = 42; 53 x = (char*)realloc(t, size); 54 assert(*t == 42); 55 free(t); 56 } 57 // The NULL pointer is printed differently on different systems, while (long)0 58 // is always the same. 59 fprintf(stderr, "x: %lx\n", (long)x); 60 free(x); 61 return x != 0; 62} 63// CHECK-mCRASH: malloc: 64// CHECK-mCRASH: AddressSanitizer's allocator is terminating the process 65// CHECK-cCRASH: calloc: 66// CHECK-cCRASH: AddressSanitizer's allocator is terminating the process 67// CHECK-coCRASH: calloc-overflow: 68// CHECK-coCRASH: AddressSanitizer's allocator is terminating the process 69// CHECK-rCRASH: realloc: 70// CHECK-rCRASH: AddressSanitizer's allocator is terminating the process 71// CHECK-mrCRASH: realloc-after-malloc: 72// CHECK-mrCRASH: AddressSanitizer's allocator is terminating the process 73 74// CHECK-mNULL: malloc: 75// CHECK-mNULL: x: 0 76// CHECK-cNULL: calloc: 77// CHECK-cNULL: x: 0 78// CHECK-coNULL: calloc-overflow: 79// CHECK-coNULL: x: 0 80// CHECK-rNULL: realloc: 81// CHECK-rNULL: x: 0 82// CHECK-mrNULL: realloc-after-malloc: 83// CHECK-mrNULL: x: 0 84