blob: 1fc3c05f1cedfda533dcfb92c5b413b44b5f4edd [file] [log] [blame]
// Copyright 2017 The Crashpad Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "util/process/process_memory_linux.h"
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <algorithm>
#include <limits>
#include "base/logging.h"
#include "base/posix/eintr_wrapper.h"
namespace crashpad {
ProcessMemoryLinux::ProcessMemoryLinux()
: ProcessMemory(), mem_fd_(), pid_(-1), initialized_() {}
ProcessMemoryLinux::~ProcessMemoryLinux() {}
bool ProcessMemoryLinux::Initialize(pid_t pid) {
INITIALIZATION_STATE_SET_INITIALIZING(initialized_);
pid_ = pid;
char path[32];
snprintf(path, sizeof(path), "/proc/%d/mem", pid_);
mem_fd_.reset(HANDLE_EINTR(open(path, O_RDONLY | O_NOCTTY | O_CLOEXEC)));
if (!mem_fd_.is_valid()) {
PLOG(ERROR) << "open";
return false;
}
INITIALIZATION_STATE_SET_VALID(initialized_);
return true;
}
ssize_t ProcessMemoryLinux::ReadUpTo(VMAddress address,
size_t size,
void* buffer) const {
INITIALIZATION_STATE_DCHECK_VALID(initialized_);
DCHECK(mem_fd_.is_valid());
DCHECK_LE(size, size_t{std::numeric_limits<ssize_t>::max()});
ssize_t bytes_read =
HANDLE_EINTR(pread64(mem_fd_.get(), buffer, size, address));
if (bytes_read < 0) {
PLOG(ERROR) << "pread64";
}
return bytes_read;
}
} // namespace crashpad