1 // RUN: %clangxx_scudo %s -lstdc++ -o %t 2 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-max 3 // RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t malloc 2>&1 4 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-calloc 5 // RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t calloc 2>&1 6 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t new 2>&1 | FileCheck %s --check-prefix=CHECK-max 7 // RUN: %env_scudo_opts=allocator_may_return_null=1 not %run %t new 2>&1 | FileCheck %s --check-prefix=CHECK-oom 8 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t new-nothrow 2>&1 | FileCheck %s --check-prefix=CHECK-max 9 // RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t new-nothrow 2>&1 10 // RUN: %run %t usable 2>&1 11 12 // Tests for various edge cases related to sizes, notably the maximum size the 13 // allocator can allocate. Tests that an integer overflow in the parameters of 14 // calloc is caught. 15 16 #include <assert.h> 17 #include <malloc.h> 18 #include <stdlib.h> 19 #include <string.h> 20 21 #include <limits> 22 #include <new> 23 24 #include <sanitizer/allocator_interface.h> 25 26 int main(int argc, char **argv) { 27 assert(argc == 2); 28 29 #if __LP64__ || defined(_WIN64) 30 static const size_t kMaxAllowedMallocSize = 1ULL << 40; 31 static const size_t kChunkHeaderSize = 16; 32 #else 33 static const size_t kMaxAllowedMallocSize = 2UL << 30; 34 static const size_t kChunkHeaderSize = 8; 35 #endif 36 37 if (!strcmp(argv[1], "malloc")) { 38 void *p = malloc(kMaxAllowedMallocSize); 39 assert(!p); 40 p = malloc(kMaxAllowedMallocSize - kChunkHeaderSize); 41 assert(!p); 42 } else if (!strcmp(argv[1], "calloc")) { 43 // Trigger an overflow in calloc. 44 size_t size = std::numeric_limits<size_t>::max(); 45 void *p = calloc((size / 0x1000) + 1, 0x1000); 46 assert(!p); 47 } else if (!strcmp(argv[1], "new")) { 48 void *p = operator new(kMaxAllowedMallocSize); 49 assert(!p); 50 } else if (!strcmp(argv[1], "new-nothrow")) { 51 void *p = operator new(kMaxAllowedMallocSize, std::nothrow); 52 assert(!p); 53 } else if (!strcmp(argv[1], "usable")) { 54 // Playing with the actual usable size of a chunk. 55 void *p = malloc(1007); 56 assert(p); 57 size_t size = __sanitizer_get_allocated_size(p); 58 assert(size >= 1007); 59 memset(p, 'A', size); 60 p = realloc(p, 2014); 61 assert(p); 62 size = __sanitizer_get_allocated_size(p); 63 assert(size >= 2014); 64 memset(p, 'B', size); 65 free(p); 66 } else { 67 assert(0); 68 } 69 70 return 0; 71 } 72 73 // CHECK-max: {{Scudo ERROR: requested allocation size .* exceeds maximum supported size}} 74 // CHECK-oom: Scudo ERROR: allocator is out of memory 75 // CHECK-calloc: Scudo ERROR: calloc parameters overflow 76