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b918119ca2
Bug: crashpad:250 Change-Id: I2ff9c2d810f7af25f7438e974e0adfb5abebec16 Reviewed-on: https://chromium-review.googlesource.com/1200962 Commit-Queue: Joshua Peraza <jperaza@chromium.org> Reviewed-by: Mark Mentovai <mark@chromium.org>
97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
// 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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#ifndef CRASHPAD_UTIL_LINUX_PTRACE_CLIENT_H_
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#define CRASHPAD_UTIL_LINUX_PTRACE_CLIENT_H_
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#include <sys/types.h>
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#include <memory>
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#include "base/macros.h"
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#include "util/linux/ptrace_connection.h"
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#include "util/misc/address_types.h"
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#include "util/misc/initialization_state_dcheck.h"
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#include "util/process/process_memory.h"
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namespace crashpad {
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//! \brief Implements a PtraceConnection over a socket.
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//!
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//! This class forms the client half of the connection and is typically used
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//! when the current process does not have `ptrace` capabilities on the target
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//! process. It should be created with a socket connected to a PtraceBroker.
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class PtraceClient : public PtraceConnection {
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public:
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PtraceClient();
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~PtraceClient();
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//! \brief Initializes this object.
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//!
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//! This method must be successfully called before any other method in this
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//! class.
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//!
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//! \param[in] sock A socket connected to a PtraceBroker. Does not take
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//! ownership of the socket.
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//! \param[in] pid The process ID of the process to form a PtraceConnection
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//! with.
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//! \param[in] try_direct_memory If `true` the client will attempt to support
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//! memory reading operations by directly acessing the target process'
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//! /proc/[pid]/mem file.
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//! \return `true` on success. `false` on failure with a message logged.
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bool Initialize(int sock, pid_t pid, bool try_direct_memory = true);
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// PtraceConnection:
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pid_t GetProcessID() override;
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bool Attach(pid_t tid) override;
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bool Is64Bit() override;
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bool GetThreadInfo(pid_t tid, ThreadInfo* info) override;
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bool ReadFileContents(const base::FilePath& path,
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std::string* contents) override;
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ProcessMemory* Memory() override;
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bool Threads(std::vector<pid_t>* threads) override;
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private:
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class BrokeredMemory : public ProcessMemory {
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public:
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explicit BrokeredMemory(PtraceClient* client);
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~BrokeredMemory();
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ssize_t ReadUpTo(VMAddress address,
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size_t size,
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void* buffer) const override;
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private:
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PtraceClient* client_;
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DISALLOW_COPY_AND_ASSIGN(BrokeredMemory);
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};
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ssize_t ReadUpTo(VMAddress address, size_t size, void* buffer) const;
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bool SendFilePath(const char* path, size_t length);
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std::unique_ptr<ProcessMemory> memory_;
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int sock_;
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pid_t pid_;
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bool is_64_bit_;
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InitializationStateDcheck initialized_;
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DISALLOW_COPY_AND_ASSIGN(PtraceClient);
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};
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} // namespace crashpad
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#endif // CRASHPAD_UTIL_LINUX_PTRACE_CLIENT_H_
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