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// Copyright 2022 gRPC authors.
//
// 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 <grpc/support/port_platform.h>
#ifndef GRPC_ENABLE_FORK_SUPPORT
// Test nothing, everything is fine
int main(int /* argc */, char** /* argv */) { return 0; }
#else // GRPC_ENABLE_FORK_SUPPORT
#include <sys/wait.h>
#include <unistd.h>
#include <gtest/gtest.h>
#include "absl/time/clock.h"
#include <grpc/grpc.h>
#include <grpc/support/log.h>
#include "src/core/lib/event_engine/forkable.h"
namespace {
using ::grpc_event_engine::experimental::Forkable;
using ::grpc_event_engine::experimental::RegisterForkHandlers;
} // namespace
class ForkableTest : public testing::Test {};
#ifdef GRPC_POSIX_FORK_ALLOW_PTHREAD_ATFORK
TEST_F(ForkableTest, BasicPthreadAtForkOperations) {
class SomeForkable : public Forkable {
public:
void PrepareFork() override { prepare_called_ = true; }
void PostforkParent() override { parent_called_ = true; }
void PostforkChild() override { child_called_ = true; }
void CheckParent() {
EXPECT_TRUE(prepare_called_);
EXPECT_TRUE(parent_called_);
EXPECT_FALSE(child_called_);
}
void CheckChild() {
EXPECT_TRUE(prepare_called_);
EXPECT_FALSE(parent_called_);
EXPECT_TRUE(child_called_);
}
private:
bool prepare_called_ = false;
bool parent_called_ = false;
bool child_called_ = false;
};
SomeForkable forkable;
int child_pid = fork();
ASSERT_NE(child_pid, -1);
if (child_pid == 0) {
gpr_log(GPR_DEBUG, "I am child pid: %d", getpid());
forkable.CheckChild();
exit(testing::Test::HasFailure());
} else {
gpr_log(GPR_DEBUG, "I am parent pid: %d", getpid());
forkable.CheckParent();
int status;
gpr_log(GPR_DEBUG, "Waiting for child pid: %d", child_pid);
do {
// retry on EINTR, and fail otherwise
if (waitpid(child_pid, &status, 0) != -1) break;
ASSERT_EQ(errno, EINTR);
} while (true);
if (WIFEXITED(status)) {
ASSERT_EQ(WEXITSTATUS(status), 0);
} else {
// exited abnormally, fail and print the exit status
ASSERT_EQ(-99, status);
}
}
}
#endif // GRPC_POSIX_FORK_ALLOW_PTHREAD_ATFORK
int main(int argc, char** argv) {
testing::InitGoogleTest(&argc, argv);
RegisterForkHandlers();
auto result = RUN_ALL_TESTS();
return result;
}
#endif // GRPC_ENABLE_FORK_SUPPORT
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