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4d2414e38e
Bug: crashpad:196 Change-Id: I04a29afcbb16b5ef14d6f83d7af1d954f5164ee9 Reviewed-on: https://chromium-review.googlesource.com/868736 Reviewed-by: Mark Mentovai <mark@chromium.org> Reviewed-by: Joshua Peraza <jperaza@chromium.org> Commit-Queue: Scott Graham <scottmg@chromium.org>
75 lines
2.1 KiB
C++
75 lines
2.1 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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#include "util/process/process_memory_linux.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <algorithm>
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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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ProcessMemoryLinux::ProcessMemoryLinux()
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: ProcessMemory(), mem_fd_(), pid_(-1), initialized_() {}
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ProcessMemoryLinux::~ProcessMemoryLinux() {}
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bool ProcessMemoryLinux::Initialize(pid_t pid) {
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INITIALIZATION_STATE_SET_INITIALIZING(initialized_);
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pid_ = pid;
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char path[32];
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snprintf(path, sizeof(path), "/proc/%d/mem", pid_);
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mem_fd_.reset(HANDLE_EINTR(open(path, O_RDONLY | O_NOCTTY | O_CLOEXEC)));
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if (!mem_fd_.is_valid()) {
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PLOG(ERROR) << "open";
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return false;
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}
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INITIALIZATION_STATE_SET_VALID(initialized_);
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return true;
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}
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bool ProcessMemoryLinux::Read(VMAddress address,
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size_t size,
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void* buffer) const {
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INITIALIZATION_STATE_DCHECK_VALID(initialized_);
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DCHECK(mem_fd_.is_valid());
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char* buffer_c = static_cast<char*>(buffer);
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while (size > 0) {
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ssize_t bytes_read =
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HANDLE_EINTR(pread64(mem_fd_.get(), buffer_c, size, address));
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if (bytes_read < 0) {
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PLOG(ERROR) << "pread64";
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return false;
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}
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if (bytes_read == 0) {
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LOG(ERROR) << "unexpected eof";
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return false;
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}
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DCHECK_LE(static_cast<size_t>(bytes_read), size);
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size -= bytes_read;
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address += bytes_read;
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buffer_c += bytes_read;
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}
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return true;
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}
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} // namespace crashpad
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