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This may help us debug some issues where the thread is failing to suspend. Bug: b/151318587 Change-Id: I0d2d539f769ebb1cdd71606e1d23d8fa66673879 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2103411 Commit-Queue: John Bauman <jbauman@chromium.org> Reviewed-by: Scott Graham <scottmg@chromium.org>
69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
// Copyright 2018 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/fuchsia/scoped_task_suspend.h"
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#include <lib/zx/time.h>
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#include <zircon/errors.h>
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#include <zircon/status.h>
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#include <zircon/syscalls/object.h>
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#include <vector>
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#include "base/fuchsia/fuchsia_logging.h"
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#include "base/logging.h"
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#include "util/fuchsia/koid_utilities.h"
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namespace crashpad {
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ScopedTaskSuspend::ScopedTaskSuspend(const zx::process& process) {
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DCHECK_NE(process.get(), zx::process::self()->get());
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const zx_status_t suspend_status = process.suspend(&suspend_token_);
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if (suspend_status != ZX_OK) {
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ZX_LOG(ERROR, suspend_status) << "zx_task_suspend";
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return;
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}
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// suspend() is asynchronous so we now check that each thread is indeed
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// suspended, up to some deadline.
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for (const auto& thread : GetThreadHandles(process)) {
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// We omit the crashed thread (blocked in an exception) as it is technically
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// not suspended, cf. ZX-3772.
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zx_info_thread_t info;
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if (thread.get_info(
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ZX_INFO_THREAD, &info, sizeof(info), nullptr, nullptr) == ZX_OK) {
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if (info.state == ZX_THREAD_STATE_BLOCKED_EXCEPTION) {
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continue;
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}
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}
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zx_signals_t observed = 0u;
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const zx_status_t wait_status = thread.wait_one(
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ZX_THREAD_SUSPENDED, zx::deadline_after(zx::msec(50)), &observed);
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if (wait_status != ZX_OK) {
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zx_info_thread_t info = {};
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zx_status_t info_status = thread.get_info(
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ZX_INFO_THREAD, &info, sizeof(info), nullptr, nullptr);
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ZX_LOG(ERROR, wait_status) << "thread failed to suspend";
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LOG(ERROR) << "Thread info status " << info_status;
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if (info_status == ZX_OK) {
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LOG(ERROR) << "Thread state " << info.state;
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}
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}
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}
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}
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} // namespace crashpad
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