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https://github.com/chromium/crashpad.git
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63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
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// Copyright 2017 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/linux/scoped_ptrace_attach.h"
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#include <sys/ptrace.h>
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#include <sys/wait.h>
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#include "base/logging.h"
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#include "base/posix/eintr_wrapper.h"
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namespace crashpad {
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ScopedPtraceAttach::ScopedPtraceAttach()
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: pid_(-1) {}
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ScopedPtraceAttach::~ScopedPtraceAttach() {
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Reset();
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}
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bool ScopedPtraceAttach::Reset() {
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if (pid_ >= 0 && ptrace(PTRACE_DETACH, pid_, nullptr, nullptr) != 0) {
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PLOG(ERROR) << "ptrace";
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return false;
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}
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pid_ = -1;
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return true;
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}
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bool ScopedPtraceAttach::ResetAttach(pid_t pid) {
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Reset();
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if (ptrace(PTRACE_ATTACH, pid, nullptr, nullptr) != 0) {
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PLOG(ERROR) << "ptrace";
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return false;
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}
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pid_ = pid;
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int status;
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if (HANDLE_EINTR(waitpid(pid_, &status, __WALL)) < 0) {
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PLOG(ERROR) << "waitpid";
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return false;
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}
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if (!WIFSTOPPED(status)) {
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LOG(ERROR) << "process not stopped";
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return false;
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}
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return true;
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}
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} // namespace crashpad
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