313 lines
10 KiB
C++
313 lines
10 KiB
C++
// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// This file contains a program for running the test suite in a separate
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// process. The other alternative is to run the suite in-process. See
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// conformance.proto for pros/cons of these two options.
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//
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// This program will fork the process under test and communicate with it over
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// its stdin/stdout:
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//
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// +--------+ pipe +----------+
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// | tester | <------> | testee |
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// | | | |
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// | C++ | | any lang |
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// +--------+ +----------+
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//
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// The tester contains all of the test cases and their expected output.
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// The testee is a simple program written in the target language that reads
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// each test case and attempts to produce acceptable output for it.
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//
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// Every test consists of a ConformanceRequest/ConformanceResponse
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// request/reply pair. The protocol on the pipe is simply:
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//
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// 1. tester sends 4-byte length N (little endian)
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// 2. tester sends N bytes representing a ConformanceRequest proto
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// 3. testee sends 4-byte length M (little endian)
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// 4. testee sends M bytes representing a ConformanceResponse proto
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#include <algorithm>
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#include <errno.h>
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#include <fstream>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <vector>
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#include <google/protobuf/stubs/stringprintf.h>
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#include "conformance.pb.h"
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#include "conformance_test.h"
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using conformance::ConformanceRequest;
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using conformance::ConformanceResponse;
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using google::protobuf::internal::scoped_array;
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using google::protobuf::StringAppendF;
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using std::string;
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using std::vector;
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#define STRINGIFY(x) #x
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#define TOSTRING(x) STRINGIFY(x)
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#define CHECK_SYSCALL(call) \
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if (call < 0) { \
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perror(#call " " __FILE__ ":" TOSTRING(__LINE__)); \
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exit(1); \
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}
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// Test runner that spawns the process being tested and communicates with it
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// over a pipe.
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class ForkPipeRunner : public google::protobuf::ConformanceTestRunner {
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public:
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ForkPipeRunner(const std::string &executable)
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: child_pid_(-1), executable_(executable) {}
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virtual ~ForkPipeRunner() {}
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void RunTest(const std::string& test_name,
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const std::string& request,
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std::string* response) {
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if (child_pid_ < 0) {
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SpawnTestProgram();
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}
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current_test_name_ = test_name;
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uint32_t len = request.size();
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CheckedWrite(write_fd_, &len, sizeof(uint32_t));
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CheckedWrite(write_fd_, request.c_str(), request.size());
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if (!TryRead(read_fd_, &len, sizeof(uint32_t))) {
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// We failed to read from the child, assume a crash and try to reap.
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GOOGLE_LOG(INFO) << "Trying to reap child, pid=" << child_pid_;
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int status;
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waitpid(child_pid_, &status, WEXITED);
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string error_msg;
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if (WIFEXITED(status)) {
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StringAppendF(&error_msg,
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"child exited, status=%d", WEXITSTATUS(status));
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} else if (WIFSIGNALED(status)) {
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StringAppendF(&error_msg,
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"child killed by signal %d", WTERMSIG(status));
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}
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GOOGLE_LOG(INFO) << error_msg;
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child_pid_ = -1;
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conformance::ConformanceResponse response_obj;
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response_obj.set_runtime_error(error_msg);
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response_obj.SerializeToString(response);
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return;
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}
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response->resize(len);
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CheckedRead(read_fd_, (void*)response->c_str(), len);
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}
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private:
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// TODO(haberman): make this work on Windows, instead of using these
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// UNIX-specific APIs.
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//
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// There is a platform-agnostic API in
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// src/google/protobuf/compiler/subprocess.h
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//
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// However that API only supports sending a single message to the subprocess.
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// We really want to be able to send messages and receive responses one at a
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// time:
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//
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// 1. Spawning a new process for each test would take way too long for thousands
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// of tests and subprocesses like java that can take 100ms or more to start
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// up.
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//
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// 2. Sending all the tests in one big message and receiving all results in one
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// big message would take away our visibility about which test(s) caused a
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// crash or other fatal error. It would also give us only a single failure
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// instead of all of them.
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void SpawnTestProgram() {
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int toproc_pipe_fd[2];
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int fromproc_pipe_fd[2];
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if (pipe(toproc_pipe_fd) < 0 || pipe(fromproc_pipe_fd) < 0) {
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perror("pipe");
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exit(1);
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}
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pid_t pid = fork();
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if (pid < 0) {
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perror("fork");
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exit(1);
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}
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if (pid) {
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// Parent.
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CHECK_SYSCALL(close(toproc_pipe_fd[0]));
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CHECK_SYSCALL(close(fromproc_pipe_fd[1]));
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write_fd_ = toproc_pipe_fd[1];
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read_fd_ = fromproc_pipe_fd[0];
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child_pid_ = pid;
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} else {
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// Child.
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CHECK_SYSCALL(close(STDIN_FILENO));
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CHECK_SYSCALL(close(STDOUT_FILENO));
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CHECK_SYSCALL(dup2(toproc_pipe_fd[0], STDIN_FILENO));
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CHECK_SYSCALL(dup2(fromproc_pipe_fd[1], STDOUT_FILENO));
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CHECK_SYSCALL(close(toproc_pipe_fd[0]));
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CHECK_SYSCALL(close(fromproc_pipe_fd[1]));
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CHECK_SYSCALL(close(toproc_pipe_fd[1]));
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CHECK_SYSCALL(close(fromproc_pipe_fd[0]));
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scoped_array<char> executable(new char[executable_.size() + 1]);
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memcpy(executable.get(), executable_.c_str(), executable_.size());
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executable[executable_.size()] = '\0';
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char *const argv[] = {executable.get(), NULL};
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CHECK_SYSCALL(execv(executable.get(), argv)); // Never returns.
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}
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}
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void CheckedWrite(int fd, const void *buf, size_t len) {
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if (write(fd, buf, len) != len) {
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GOOGLE_LOG(FATAL) << current_test_name_
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<< ": error writing to test program: "
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<< strerror(errno);
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}
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}
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bool TryRead(int fd, void *buf, size_t len) {
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size_t ofs = 0;
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while (len > 0) {
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ssize_t bytes_read = read(fd, (char*)buf + ofs, len);
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if (bytes_read == 0) {
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GOOGLE_LOG(ERROR) << current_test_name_
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<< ": unexpected EOF from test program";
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return false;
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} else if (bytes_read < 0) {
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GOOGLE_LOG(ERROR) << current_test_name_
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<< ": error reading from test program: "
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<< strerror(errno);
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return false;
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}
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len -= bytes_read;
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ofs += bytes_read;
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}
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return true;
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}
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void CheckedRead(int fd, void *buf, size_t len) {
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if (!TryRead(fd, buf, len)) {
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GOOGLE_LOG(FATAL) << current_test_name_
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<< ": error reading from test program: "
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<< strerror(errno);
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}
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}
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int write_fd_;
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int read_fd_;
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pid_t child_pid_;
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std::string executable_;
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std::string current_test_name_;
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};
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void UsageError() {
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fprintf(stderr,
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"Usage: conformance-test-runner [options] <test-program>\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "Options:\n");
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fprintf(stderr,
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" --failure_list <filename> Use to specify list of tests\n");
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fprintf(stderr,
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" that are expected to fail. File\n");
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fprintf(stderr,
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" should contain one test name per\n");
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fprintf(stderr,
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" line. Use '#' for comments.\n");
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exit(1);
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}
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void ParseFailureList(const char *filename, vector<string>* failure_list) {
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std::ifstream infile(filename);
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if (!infile.is_open()) {
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fprintf(stderr, "Couldn't open failure list file: %s\n", filename);
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exit(1);
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}
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for (string line; getline(infile, line);) {
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// Remove whitespace.
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line.erase(std::remove_if(line.begin(), line.end(), ::isspace),
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line.end());
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// Remove comments.
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line = line.substr(0, line.find("#"));
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if (!line.empty()) {
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failure_list->push_back(line);
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}
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}
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}
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int main(int argc, char *argv[]) {
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char *program;
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google::protobuf::ConformanceTestSuite suite;
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vector<string> failure_list;
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for (int arg = 1; arg < argc; ++arg) {
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if (strcmp(argv[arg], "--failure_list") == 0) {
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if (++arg == argc) UsageError();
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ParseFailureList(argv[arg], &failure_list);
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} else if (strcmp(argv[arg], "--verbose") == 0) {
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suite.SetVerbose(true);
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} else if (argv[arg][0] == '-') {
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fprintf(stderr, "Unknown option: %s\n", argv[arg]);
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UsageError();
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} else {
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if (arg != argc - 1) {
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fprintf(stderr, "Too many arguments.\n");
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UsageError();
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}
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program = argv[arg];
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}
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}
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suite.SetFailureList(failure_list);
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ForkPipeRunner runner(program);
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std::string output;
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bool ok = suite.RunSuite(&runner, &output);
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fwrite(output.c_str(), 1, output.size(), stderr);
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return ok ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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