forked from OSchip/llvm-project
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
//===-- sanitizer_stackdepot.h ----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is shared between AddressSanitizer and ThreadSanitizer
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// run-time libraries.
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_STACKDEPOT_H
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#define SANITIZER_STACKDEPOT_H
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#include "sanitizer_common.h"
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#include "sanitizer_internal_defs.h"
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#include "sanitizer_stacktrace.h"
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namespace __sanitizer {
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// StackDepot efficiently stores huge amounts of stack traces.
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struct StackDepotNode;
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struct StackDepotHandle {
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StackDepotNode *node_;
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StackDepotHandle() : node_(nullptr) {}
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explicit StackDepotHandle(StackDepotNode *node) : node_(node) {}
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bool valid() { return node_; }
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u32 id();
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int use_count();
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void inc_use_count_unsafe();
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};
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const int kStackDepotMaxUseCount = 1U << 20;
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StackDepotStats *StackDepotGetStats();
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u32 StackDepotPut(StackTrace stack);
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StackDepotHandle StackDepotPut_WithHandle(StackTrace stack);
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// Retrieves a stored stack trace by the id.
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StackTrace StackDepotGet(u32 id);
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void StackDepotLockAll();
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void StackDepotUnlockAll();
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// Instantiating this class creates a snapshot of StackDepot which can be
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// efficiently queried with StackDepotGet(). You can use it concurrently with
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// StackDepot, but the snapshot is only guaranteed to contain those stack traces
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// which were stored before it was instantiated.
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class StackDepotReverseMap {
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public:
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StackDepotReverseMap();
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StackTrace Get(u32 id);
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private:
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struct IdDescPair {
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u32 id;
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StackDepotNode *desc;
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static bool IdComparator(const IdDescPair &a, const IdDescPair &b);
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};
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InternalMmapVector<IdDescPair> map_;
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// Disallow evil constructors.
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StackDepotReverseMap(const StackDepotReverseMap&);
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void operator=(const StackDepotReverseMap&);
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};
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} // namespace __sanitizer
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#endif // SANITIZER_STACKDEPOT_H
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