62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/test/multiprocess_test.h"
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#include <unistd.h>
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#include "base/containers/hash_tables.h"
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#include "base/logging.h"
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#include "base/posix/eintr_wrapper.h"
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#include "testing/multiprocess_func_list.h"
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namespace base {
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// A very basic implementation for android. On Android tests can run in an APK
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// and we don't have an executable to exec*. This implementation does the bare
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// minimum to execute the method specified by procname (in the child process).
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// - |debug_on_start| is ignored.
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ProcessHandle MultiProcessTest::SpawnChildImpl(
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const std::string& procname,
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const FileHandleMappingVector& fds_to_remap,
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bool debug_on_start) {
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pid_t pid = fork();
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if (pid < 0) {
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PLOG(ERROR) << "fork";
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return kNullProcessHandle;
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}
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if (pid > 0) {
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// Parent process.
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return pid;
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}
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// Child process.
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std::hash_set<int> fds_to_keep_open;
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for (FileHandleMappingVector::const_iterator it = fds_to_remap.begin();
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it != fds_to_remap.end(); ++it) {
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fds_to_keep_open.insert(it->first);
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}
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// Keep stdin, stdout and stderr open since this is not meant to spawn a
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// daemon.
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const int kFdForAndroidLogging = 3; // FD used by __android_log_write().
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for (int fd = kFdForAndroidLogging + 1; fd < getdtablesize(); ++fd) {
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if (fds_to_keep_open.find(fd) == fds_to_keep_open.end()) {
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HANDLE_EINTR(close(fd));
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}
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}
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for (FileHandleMappingVector::const_iterator it = fds_to_remap.begin();
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it != fds_to_remap.end(); ++it) {
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int old_fd = it->first;
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int new_fd = it->second;
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if (dup2(old_fd, new_fd) < 0) {
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PLOG(FATAL) << "dup2";
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}
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HANDLE_EINTR(close(old_fd));
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}
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_exit(multi_process_function_list::InvokeChildProcessTest(procname));
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return 0;
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}
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} // namespace base
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