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// Copyright 2021 Code Intelligence GmbH
//
// 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
//
// http://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.
#include <jni.h>
#include <atomic>
#include <csignal>
#include "com_code_intelligence_jazzer_runtime_SignalHandler.h"
#ifdef _WIN32
// Windows does not have SIGUSR1, which triggers a graceful exit of libFuzzer.
// Instead, trigger a hard exit.
#define SIGUSR1 SIGTERM
#endif
// Handles SIGINT raised while running Java code.
[[maybe_unused]] void
Java_com_code_1intelligence_jazzer_runtime_SignalHandler_handleInterrupt(
JNIEnv *, jclass) {
static std::atomic<bool> already_exiting{false};
if (!already_exiting.exchange(true)) {
// Let libFuzzer exit gracefully when the JVM received SIGINT.
raise(SIGUSR1);
} else {
// Exit libFuzzer forcefully on repeated SIGINTs.
raise(SIGTERM);
}
}
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