155 lines
5.3 KiB
C++
155 lines
5.3 KiB
C++
// Copyright 2014 The Crashpad Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CRASHPAD_TEST_MULTIPROCESS_EXEC_H_
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#define CRASHPAD_TEST_MULTIPROCESS_EXEC_H_
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#include <string>
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#include <vector>
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#include "base/files/file_path.h"
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#include "build/build_config.h"
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#include "test/multiprocess.h"
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#include "test/process_type.h"
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//! \file
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namespace crashpad {
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namespace test {
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namespace internal {
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//! \brief Command line argument used to indicate that a child test function
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//! should be run.
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constexpr char kChildTestFunction[] = "--child-test-function=";
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//! \brief Helper class used by CRASHPAD_CHILD_TEST_MAIN() to insert a child
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//! function into the global mapping.
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class AppendMultiprocessTest {
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public:
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AppendMultiprocessTest(const std::string& test_name,
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int (*main_function_pointer)());
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};
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//! \brief Used to run a child test function by name, registered by
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//! CRASHPAD_CHILD_TEST_MAIN().
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//!
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//! \return The exit code of the child process after running the function named
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//! by \a test_name. Aborts with a CHECK() if \a test_name wasn't
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//! registered.
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int CheckedInvokeMultiprocessChild(const std::string& test_name);
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} // namespace internal
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//! \brief Registers a function that can be invoked as a child process by
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//! MultiprocessExec.
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//!
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//! Used as:
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//!
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//! \code
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//! CRASHPAD_CHILD_TEST_MAIN(MyChildTestBody) {
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//! ... child body ...
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//! }
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//! \endcode
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//!
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//! In the main (parent) test body, this function can be run in a child process
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//! via MultiprocessExec::SetChildTestMainFunction().
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#define CRASHPAD_CHILD_TEST_MAIN(test_main) \
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int test_main(); \
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namespace { \
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::crashpad::test::internal::AppendMultiprocessTest \
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AddMultiprocessTest##_##test_main(#test_main, (test_main)); \
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} /* namespace */ \
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int test_main()
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//! \brief Manages an `exec()`-based multiprocess test.
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//!
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//! These tests are based on `fork()` and `exec()`. The parent process is able
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//! to communicate with the child in the same manner as a base-class
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//! Multiprocess parent. The read and write pipes appear in the child process on
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//! stdin and stdout, respectively.
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//!
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//! Subclasses are expected to implement the parent in the same was as a
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//! base-class Multiprocess parent. The child must be implemented in an
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//! executable to be set by SetChildCommand().
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class MultiprocessExec : public Multiprocess {
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public:
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MultiprocessExec();
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MultiprocessExec(const MultiprocessExec&) = delete;
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MultiprocessExec& operator=(const MultiprocessExec&) = delete;
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//! \brief Sets the command to `exec()` in the child.
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//!
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//! This method must be called before the test can be Run().
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//!
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//! This method is useful when a custom executable is required for the child
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//! binary, however, SetChildTestMainFunction() should generally be preferred.
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//!
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//! \param[in] command The executable’s pathname.
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//! \param[in] arguments The command-line arguments to pass to the child
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//! process in its `argv[]` vector. This vector must begin at `argv[1]`,
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//! as \a command is implicitly used as `argv[0]`. This argument may be
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//! `nullptr` if no command-line arguments are to be passed.
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//!
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//! \sa SetChildTestMainFunction
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void SetChildCommand(const base::FilePath& command,
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const std::vector<std::string>* arguments);
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//! \brief Calls SetChildCommand() to run a child test main function
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//! registered with CRASHPAD_CHILD_TEST_MAIN().
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//!
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//! This uses the same launch mechanism as SetChildCommand(), but coordinates
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//! with test/gtest_main.cc to allow for simple registration of a child
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//! processes' entry point via the helper macro, rather than needing to create
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//! a separate build target.
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//!
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//! \param[in] function_name The name of the function as passed to
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//! CRASHPAD_CHILD_TEST_MAIN().
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void SetChildTestMainFunction(const std::string& function_name);
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//! \brief Returns a ProcessType representing the child process.
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//!
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//! This method is only valid during the body of MultiprocessParent().
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//!
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//! \return A platform-specific type representing the child process. This
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//! method can fail on macOS because access to a child's task port
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//! requires the task_for_pid entitlement.
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ProcessType ChildProcess();
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protected:
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~MultiprocessExec();
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// Multiprocess:
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void PreFork() override;
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private:
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// Multiprocess:
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void MultiprocessChild() override;
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base::FilePath command_;
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std::vector<std::string> arguments_;
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#if BUILDFLAG(IS_POSIX)
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std::vector<const char*> argv_;
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#elif BUILDFLAG(IS_WIN)
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std::wstring command_line_;
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#endif // BUILDFLAG(IS_POSIX)
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};
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} // namespace test
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} // namespace crashpad
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#endif // CRASHPAD_TEST_MULTIPROCESS_EXEC_H_
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