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75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
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// Copyright 2018 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_SNAPSHOT_SANITIZED_MEMORY_SNAPSHOT_SANITIZED_H_
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#define CRASHPAD_SNAPSHOT_SANITIZED_MEMORY_SNAPSHOT_SANITIZED_H_
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#include <stdint.h>
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#include "snapshot/memory_snapshot.h"
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#include "util/misc/range_set.h"
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namespace crashpad {
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namespace internal {
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//! \brief A MemorySnapshot which wraps and filters sensitive information from
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//! another MemorySnapshot.
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//!
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//! This class redacts all data from the wrapped MemorySnapshot unless:
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//! 1. The data is pointer aligned and points into a whitelisted address range.
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//! 2. The data is pointer aligned and is a small integer.
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class MemorySnapshotSanitized final : public MemorySnapshot {
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public:
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//! \brief Redacted data is replaced with this value, casted to the
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//! appropriate size for a pointer in the target process.
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static constexpr uint64_t kDefaced = 0x0defaced0defaced;
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//! \brief Pointer-aligned data smaller than this value is not redacted.
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static constexpr uint64_t kSmallWordMax = 4096;
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//! \brief Constructs this object.
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//!
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//! \param[in] snapshot The MemorySnapshot to sanitize.
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//! \param[in] ranges A set of whitelisted address ranges.
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//! \param[in] is_64_bit `true` if this memory is for a 64-bit process.
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MemorySnapshotSanitized(const MemorySnapshot* snapshot,
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RangeSet* ranges,
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bool is_64_bit);
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~MemorySnapshotSanitized() override;
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// MemorySnapshot:
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uint64_t Address() const override;
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size_t Size() const override;
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bool Read(Delegate* delegate) const override;
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const MemorySnapshot* MergeWithOtherSnapshot(
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const MemorySnapshot* other) const override {
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return nullptr;
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}
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private:
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const MemorySnapshot* snapshot_;
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RangeSet* ranges_;
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bool is_64_bit_;
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DISALLOW_COPY_AND_ASSIGN(MemorySnapshotSanitized);
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};
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} // namespace internal
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} // namespace crashpad
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#endif // CRASHPAD_SNAPSHOT_SANITIZED_MEMORY_SNAPSHOT_SANITIZED_H_
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