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3c4e37178d
Change signal, uncaught NSExceptions and Mach exception handlers to prevent re-entrancy with a first-exception-wins approach to prevent concurrent exceptions from trying to use the same cached intermediate dump writer. Uses compare-and-swap to either return early for reentrant signals or to wait indefinitely for anything after the first fatal exception. Change the NSException handler generated from the Objective-C exception preprocessor to not used the cached intermediate dump writer and not use the same first-exception-wins logic. This is useful because the Objective-C exception preprocessor is imperfect and may generate intermediate dumps that are not followed by process termination. Simplify DumpWithoutCrashing's ownership of its intermediate dump writer to be thread safe. Set a handler for SIGPIPE for applications that haven't already ignored or set a handler for SIGPIPE. Bug: crashpad:391 Change-Id: Ia8ae61d50be81910fa0af40325300441d9dc01b6 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3401563 Reviewed-by: Joshua Peraza <jperaza@chromium.org> Commit-Queue: Justin Cohen <justincohen@chromium.org>
52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
// Copyright 2015 The Crashpad Authors. All rights reserved.
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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_FILE_H_
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#define CRASHPAD_TEST_FILE_H_
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#include "base/files/file_path.h"
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#include "util/file/file_io.h"
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namespace crashpad {
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namespace test {
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//! \brief Determines whether a file exists.
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//!
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//! \param[in] path The path to check for existence.
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//!
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//! \return `true` if \a path exists. `false` if it does not exist. If an error
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//! other than “file not found” occurs when searching for \a path, returns
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//! `false` with a Google Test failure added.
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bool FileExists(const base::FilePath& path);
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//! \brief Removes a file if it exists, logging a message on failure.
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//!
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//! \param[in] path The path to the file to remove.
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//! \return `true` on success. `false` on failure with a message logged.
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bool RemoveFileIfExists(const base::FilePath& path);
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//! \brief Determines the size of a file.
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//!
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//! \param[in] path The path of the file to check. The file must exist.
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//!
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//! \return The size of the file at \a path. If the file does not exist, or an
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//! error occurs when attempting to determine its size, returns `-1` with a
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//! Google Test failure added.
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FileOffset FileSize(const base::FilePath& path);
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} // namespace test
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} // namespace crashpad
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#endif // CRASHPAD_TEST_FILE_H_
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