89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
//===-- sanitizer_chained_origin_depot.h ------------------------*- C++ -*-===//
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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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// A storage for chained origins.
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_CHAINED_ORIGIN_DEPOT_H
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#define SANITIZER_CHAINED_ORIGIN_DEPOT_H
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#include "sanitizer_common.h"
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#include "sanitizer_stackdepotbase.h"
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namespace __sanitizer {
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class ChainedOriginDepot {
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public:
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ChainedOriginDepot();
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// Gets the statistic of the origin chain storage.
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StackDepotStats *GetStats();
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// Stores a chain with StackDepot ID here_id and previous chain ID prev_id.
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// If successful, returns true and the new chain id new_id.
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// If the same element already exists, returns false and sets new_id to the
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// existing ID.
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bool Put(u32 here_id, u32 prev_id, u32 *new_id);
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// Retrieves the stored StackDepot ID for the given origin ID.
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u32 Get(u32 id, u32 *other);
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void LockAll();
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void UnlockAll();
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private:
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struct ChainedOriginDepotDesc {
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u32 here_id;
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u32 prev_id;
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};
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struct ChainedOriginDepotNode {
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ChainedOriginDepotNode *link;
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u32 id;
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u32 here_id;
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u32 prev_id;
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typedef ChainedOriginDepotDesc args_type;
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bool eq(u32 hash, const args_type &args) const;
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static uptr storage_size(const args_type &args);
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static u32 hash(const args_type &args);
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static bool is_valid(const args_type &args);
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void store(const args_type &args, u32 other_hash);
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args_type load() const;
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struct Handle {
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ChainedOriginDepotNode *node_;
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Handle() : node_(nullptr) {}
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explicit Handle(ChainedOriginDepotNode *node) : node_(node) {}
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bool valid() { return node_; }
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u32 id() { return node_->id; }
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int here_id() { return node_->here_id; }
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int prev_id() { return node_->prev_id; }
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};
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Handle get_handle();
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typedef Handle handle_type;
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};
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StackDepotBase<ChainedOriginDepotNode, 4, 20> depot;
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ChainedOriginDepot(const ChainedOriginDepot &) = delete;
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void operator=(const ChainedOriginDepot &) = delete;
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};
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} // namespace __sanitizer
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#endif // SANITIZER_CHAINED_ORIGIN_DEPOT_H
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