blob: da6fbd43099ea93aeaa238f98f179a9f9b94373b [file] [log] [blame]
// Test the behavior of malloc/calloc/realloc when the allocation size is huge.
// By default (allocator_may_return_null=0) the process should crash.
// With allocator_may_return_null=1 the allocator should return 0.
//
// RUN: %clangxx_asan -O0 %s -o %t
// RUN: not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mNULL
// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cCRASH
// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cNULL
// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coCRASH
// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coNULL
// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rCRASH
// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rNULL
// RUN: env ASAN_OPTIONS=allocator_may_return_null=0 not %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrCRASH
// RUN: env ASAN_OPTIONS=allocator_may_return_null=1 %run %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrNULL
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <limits>
int main(int argc, char **argv) {
volatile size_t size = std::numeric_limits<size_t>::max() - 10000;
assert(argc == 2);
void *x = 0;
if (!strcmp(argv[1], "malloc")) {
fprintf(stderr, "malloc:\n");
x = malloc(size);
}
if (!strcmp(argv[1], "calloc")) {
fprintf(stderr, "calloc:\n");
x = calloc(size / 4, 4);
}
if (!strcmp(argv[1], "calloc-overflow")) {
fprintf(stderr, "calloc-overflow:\n");
volatile size_t kMaxSizeT = std::numeric_limits<size_t>::max();
size_t kArraySize = 4096;
volatile size_t kArraySize2 = kMaxSizeT / kArraySize + 10;
x = calloc(kArraySize, kArraySize2);
}
if (!strcmp(argv[1], "realloc")) {
fprintf(stderr, "realloc:\n");
x = realloc(0, size);
}
if (!strcmp(argv[1], "realloc-after-malloc")) {
fprintf(stderr, "realloc-after-malloc:\n");
char *t = (char*)malloc(100);
*t = 42;
x = realloc(t, size);
assert(*t == 42);
free(t);
}
// 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-mCRASH: malloc:
// CHECK-mCRASH: AddressSanitizer's allocator is terminating the process
// CHECK-cCRASH: calloc:
// CHECK-cCRASH: AddressSanitizer's allocator is terminating the process
// CHECK-coCRASH: calloc-overflow:
// CHECK-coCRASH: AddressSanitizer's allocator is terminating the process
// CHECK-rCRASH: realloc:
// CHECK-rCRASH: AddressSanitizer's allocator is terminating the process
// CHECK-mrCRASH: realloc-after-malloc:
// CHECK-mrCRASH: AddressSanitizer's allocator is terminating the process
// CHECK-mNULL: malloc:
// CHECK-mNULL: x: 0
// CHECK-cNULL: calloc:
// CHECK-cNULL: x: 0
// CHECK-coNULL: calloc-overflow:
// CHECK-coNULL: x: 0
// CHECK-rNULL: realloc:
// CHECK-rNULL: x: 0
// CHECK-mrNULL: realloc-after-malloc:
// CHECK-mrNULL: x: 0