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92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
//===-- sanitizer_deadlock_detector_interface.h -----------------*- C++ -*-===//
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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 a part of Sanitizer runtime.
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// Abstract deadlock detector interface.
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// FIXME: this is work in progress, nothing really works yet.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_DEADLOCK_DETECTOR_INTERFACE_H
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#define SANITIZER_DEADLOCK_DETECTOR_INTERFACE_H
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#ifndef SANITIZER_DEADLOCK_DETECTOR_VERSION
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# define SANITIZER_DEADLOCK_DETECTOR_VERSION 1
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#endif
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#include "sanitizer_internal_defs.h"
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#include "sanitizer_atomic.h"
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namespace __sanitizer {
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// dd - deadlock detector.
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// lt - logical (user) thread.
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// pt - physical (OS) thread.
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struct DDPhysicalThread;
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struct DDLogicalThread;
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struct DDMutex {
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#if SANITIZER_DEADLOCK_DETECTOR_VERSION == 1
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uptr id;
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u32 stk; // creation stack
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#elif SANITIZER_DEADLOCK_DETECTOR_VERSION == 2
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u32 id;
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u32 recursion;
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atomic_uintptr_t owner;
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#else
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# error "BAD SANITIZER_DEADLOCK_DETECTOR_VERSION"
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#endif
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u64 ctx;
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};
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struct DDFlags {
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bool second_deadlock_stack;
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};
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struct DDReport {
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enum { kMaxLoopSize = 8 };
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int n; // number of entries in loop
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struct {
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u64 thr_ctx; // user thread context
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u64 mtx_ctx0; // user mutex context, start of the edge
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u64 mtx_ctx1; // user mutex context, end of the edge
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u32 stk[2]; // stack ids for the edge
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} loop[kMaxLoopSize];
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};
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struct DDCallback {
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DDPhysicalThread *pt;
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DDLogicalThread *lt;
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virtual u32 Unwind() { return 0; }
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virtual int UniqueTid() { return 0; }
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};
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struct DDetector {
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static DDetector *Create(const DDFlags *flags);
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virtual DDPhysicalThread* CreatePhysicalThread() { return nullptr; }
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virtual void DestroyPhysicalThread(DDPhysicalThread *pt) {}
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virtual DDLogicalThread* CreateLogicalThread(u64 ctx) { return nullptr; }
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virtual void DestroyLogicalThread(DDLogicalThread *lt) {}
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virtual void MutexInit(DDCallback *cb, DDMutex *m) {}
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virtual void MutexBeforeLock(DDCallback *cb, DDMutex *m, bool wlock) {}
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virtual void MutexAfterLock(DDCallback *cb, DDMutex *m, bool wlock,
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bool trylock) {}
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virtual void MutexBeforeUnlock(DDCallback *cb, DDMutex *m, bool wlock) {}
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virtual void MutexDestroy(DDCallback *cb, DDMutex *m) {}
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virtual DDReport *GetReport(DDCallback *cb) { return nullptr; }
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};
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} // namespace __sanitizer
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#endif // SANITIZER_DEADLOCK_DETECTOR_INTERFACE_H
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