examples/oom_fuzz_test.cc

// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// A fuzz target that creates a memory leak and causes OOM errors.

#include <cstddef>
#include <cstdint>

void LeakMemory() {
  int* zombie_ptr = new int(100);
  zombie_ptr[0] = 0;
}

void TriggerOomError() {
  for (size_t i = 0; i < (1 << 30); ++i) {
    LeakMemory();
  }
}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
  TriggerOomError();
  return 0;
}