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2f66eefb79
Change-Id: I6afe27313093c6867d0276274e6b17b195d9d263 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2339536 Commit-Queue: Joshua Peraza <jperaza@chromium.org> Reviewed-by: Mark Mentovai <mark@chromium.org>
66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
// Copyright 2019 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_sanitized.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 <limits>
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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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ProcessMemorySanitized::ProcessMemorySanitized()
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: ProcessMemory(), memory_(nullptr), allowed_ranges_() {}
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ProcessMemorySanitized::~ProcessMemorySanitized() {}
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bool ProcessMemorySanitized::Initialize(
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const ProcessMemory* memory,
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const std::vector<std::pair<VMAddress, VMAddress>>* allowed_ranges) {
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INITIALIZATION_STATE_SET_INITIALIZING(initialized_);
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memory_ = memory;
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if (allowed_ranges)
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allowed_ranges_ = *allowed_ranges;
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INITIALIZATION_STATE_SET_VALID(initialized_);
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return true;
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}
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ssize_t ProcessMemorySanitized::ReadUpTo(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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VMAddress end = address + size;
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for (auto&& entry : allowed_ranges_) {
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if (address >= entry.first && address < entry.second &&
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end >= entry.first && end <= entry.second) {
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return memory_->ReadUpTo(address, size, buffer);
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}
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}
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DLOG(ERROR)
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<< "ProcessMemorySanitized failed to read disallowed region. address="
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<< address << " size=" << size;
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return 0;
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}
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} // namespace crashpad
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