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https://github.com/chromium/crashpad.git
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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>
92 lines
2.4 KiB
C++
92 lines
2.4 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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#include "test/file.h"
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#include <errno.h>
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#include <sys/stat.h>
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#include "base/logging.h"
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#include "base/strings/utf_string_conversions.h"
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#include "build/build_config.h"
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#include "gtest/gtest.h"
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#include "test/errors.h"
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#if BUILDFLAG(IS_WIN)
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#include <windows.h>
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#endif
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namespace crashpad {
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namespace test {
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bool FileExists(const base::FilePath& path) {
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#if BUILDFLAG(IS_POSIX)
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struct stat st;
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int rv = lstat(path.value().c_str(), &st);
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static constexpr char stat_function[] = "lstat";
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#elif BUILDFLAG(IS_WIN)
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struct _stat st;
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int rv = _wstat(path.value().c_str(), &st);
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static constexpr char stat_function[] = "_wstat";
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#else
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#error "Not implemented"
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#endif
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if (rv < 0) {
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EXPECT_EQ(errno, ENOENT) << ErrnoMessage(stat_function) << " "
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<< path.value();
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return false;
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}
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return true;
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}
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bool RemoveFileIfExists(const base::FilePath& path) {
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#if BUILDFLAG(IS_POSIX)
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if (unlink(path.value().c_str()) != 0 && errno != ENOENT) {
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PLOG(ERROR) << "unlink " << path.value();
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return false;
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}
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#elif BUILDFLAG(IS_WIN)
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if (!DeleteFile(path.value().c_str()) &&
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GetLastError() != ERROR_FILE_NOT_FOUND) {
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PLOG(ERROR) << "DeleteFile " << base::WideToUTF8(path.value());
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return false;
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}
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#else
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#error "Not implemented"
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#endif
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return true;
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}
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FileOffset FileSize(const base::FilePath& path) {
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#if BUILDFLAG(IS_POSIX)
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struct stat st;
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int rv = lstat(path.value().c_str(), &st);
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static constexpr char stat_function[] = "lstat";
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#elif BUILDFLAG(IS_WIN)
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struct _stati64 st;
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int rv = _wstati64(path.value().c_str(), &st);
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static constexpr char stat_function[] = "_wstati64";
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#else
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#error "Not implemented"
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#endif
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if (rv < 0) {
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ADD_FAILURE() << ErrnoMessage(stat_function) << " " << path.value();
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return -1;
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}
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return st.st_size;
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}
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} // namespace test
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} // namespace crashpad
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