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iOS applications may be terminated with the exception code 0xdead10cc when holding on to file locks in the shared container during suspension. One approach to minimize this is to request additional background execution time to complete the locking operation (in this case the CrashReportUpload thread and the PruneIntermediateDumpsAndCrashReports thread). Bug: crashpad:400 Change-Id: I4192ae1a92646ea337a09ac071e49761ab2d3860 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3517966 Reviewed-by: Robert Sesek <rsesek@chromium.org> Commit-Queue: Justin Cohen <justincohen@chromium.org>
59 lines
2.3 KiB
Plaintext
59 lines
2.3 KiB
Plaintext
// Copyright 2022 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 "util/ios/scoped_background_task.h"
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#import <Foundation/Foundation.h>
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#if !defined(__has_feature) || !__has_feature(objc_arc)
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#error "This file requires ARC support."
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#endif
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namespace crashpad {
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namespace internal {
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ScopedBackgroundTask::ScopedBackgroundTask(const char* task_name)
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: task_complete_semaphore_(dispatch_semaphore_create(0)) {
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__weak dispatch_semaphore_t weak_task_complete_semaphore =
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task_complete_semaphore_;
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NSString* name = [NSString stringWithUTF8String:task_name];
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[[NSProcessInfo processInfo]
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performExpiringActivityWithReason:name
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usingBlock:^(BOOL expired) {
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if (expired) {
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// TODO(crbug.com/crashpad/400): Notify the
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// BG task creator that time's up -- this will
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// be useful for BackgroundTasks and
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// NSURLSessions.
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return;
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}
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__strong dispatch_semaphore_t
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strong_task_complete_semaphore =
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weak_task_complete_semaphore;
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if (!strong_task_complete_semaphore) {
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return;
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}
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dispatch_semaphore_wait(
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strong_task_complete_semaphore,
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DISPATCH_TIME_FOREVER);
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}];
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}
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ScopedBackgroundTask::~ScopedBackgroundTask() {
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dispatch_semaphore_signal(task_complete_semaphore_);
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}
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} // namespace internal
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} // namespace crashpad
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