2d9c6e10e9
This is a part of https://reviews.llvm.org/D95835. The design is based on MSan origin chains. An 4-byte origin is a hash of an origin chain. An origin chain is a pair of a stack hash id and a hash to its previous origin chain. 0 means no previous origin chains exist. We limit the length of a chain to be 16. With origin_history_size = 0, the limit is removed. The change does not have any test cases yet. The following change will be adding test cases when the APIs are used. Reviewed-by: morehouse Differential Revision: https://reviews.llvm.org/D96160
23 lines
746 B
C++
23 lines
746 B
C++
//===-- dfsan_chained_origin_depot.cpp ------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of DataFlowSanitizer.
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//
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// A storage for chained origins.
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//===----------------------------------------------------------------------===//
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#include "dfsan_chained_origin_depot.h"
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namespace __dfsan {
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static ChainedOriginDepot chainedOriginDepot;
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ChainedOriginDepot* GetChainedOriginDepot() { return &chainedOriginDepot; }
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} // namespace __dfsan
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