sizes.cpp
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// RUN: %clangxx_scudo %s -lstdc++ -o %t
// RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-max
// RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t malloc 2>&1
// RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-calloc
// RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t calloc 2>&1
// RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t new 2>&1 | FileCheck %s --check-prefix=CHECK-max
// RUN: %env_scudo_opts=allocator_may_return_null=1 not %run %t new 2>&1 | FileCheck %s --check-prefix=CHECK-oom
// RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t new-nothrow 2>&1 | FileCheck %s --check-prefix=CHECK-max
// RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t new-nothrow 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>
int main(int argc, char **argv) {
assert(argc == 2);
#if __LP64__ || defined(_WIN64)
static const size_t kMaxAllowedMallocSize = 1ULL << 40;
static const size_t kChunkHeaderSize = 16;
#else
static const size_t kMaxAllowedMallocSize = 2UL << 30;
static const size_t kChunkHeaderSize = 8;
#endif
if (!strcmp(argv[1], "malloc")) {
void *p = malloc(kMaxAllowedMallocSize);
assert(!p);
p = malloc(kMaxAllowedMallocSize - kChunkHeaderSize);
assert(!p);
} else if (!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 (!strcmp(argv[1], "new")) {
void *p = operator new(kMaxAllowedMallocSize);
assert(!p);
} else if (!strcmp(argv[1], "new-nothrow")) {
void *p = operator new(kMaxAllowedMallocSize, std::nothrow);
assert(!p);
} else if (!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: {{Scudo ERROR: requested allocation size .* exceeds maximum supported size}}
// CHECK-oom: Scudo ERROR: allocator is out of memory
// CHECK-calloc: Scudo ERROR: calloc parameters overflow