72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
// Copyright 2017 The Crashpad Authors
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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_UTIL_LINUX_SCOPED_PTRACE_ATTACH_H_
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#define CRASHPAD_UTIL_LINUX_SCOPED_PTRACE_ATTACH_H_
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#include <sys/types.h>
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namespace crashpad {
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//! \brief Attaches to the process with process ID \a pid and blocks until the
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//! target process has stopped by calling `waitpid()`.
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//!
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//! \param pid The process ID of the process to attach to.
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//! \param can_log Whether this function may log messages on failure.
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//! \return `true` on success. `false` on failure with a message logged if \a
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//! can_log is `true`.
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bool PtraceAttach(pid_t pid, bool can_log = true);
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//! \brief Detaches the process with process ID \a pid. The process must
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//! already be ptrace attached.
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//!
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//! \param pid The process ID of the process to detach.
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//! \param can_log Whether this function may log messages on failure.
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//! \return `true` on success. `false` on failure with a message logged if \a
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//! ca_log is `true `true`
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bool PtraceDetach(pid_t pid, bool can_log = true);
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//! \brief Maintains a `ptrace()` attachment to a process.
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//!
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//! On destruction, the process will be detached.
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class ScopedPtraceAttach {
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public:
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ScopedPtraceAttach();
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ScopedPtraceAttach(const ScopedPtraceAttach&) = delete;
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ScopedPtraceAttach& operator=(const ScopedPtraceAttach&) = delete;
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~ScopedPtraceAttach();
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//! \brief Detaches from the process by calling `ptrace()`.
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//!
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//! \return `true` on success. `false` on failure, with a message logged.
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bool Reset();
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//! \brief Detaches from any previously attached process, attaches to the
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//! process with process ID \a pid, and blocks until the target process
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//! has stopped by calling `waitpid()`.
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//!
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//! \return `true` on success. `false` on failure, with a message logged.
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bool ResetAttach(pid_t pid);
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private:
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pid_t pid_;
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};
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} // namespace crashpad
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#endif // CRASHPAD_UTIL_LINUX_SCOPED_PTRACE_ATTACH_H_
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