1//===-- tsan_trace.h --------------------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file is a part of ThreadSanitizer (TSan), a race detector. 11// 12//===----------------------------------------------------------------------===// 13#ifndef TSAN_TRACE_H 14#define TSAN_TRACE_H 15 16#include "tsan_defs.h" 17#include "tsan_mutex.h" 18#include "tsan_sync.h" 19#include "tsan_mutexset.h" 20 21namespace __tsan { 22 23const int kTracePartSizeBits = 14; 24const int kTracePartSize = 1 << kTracePartSizeBits; 25const int kTraceParts = 4 * 1024 * 1024 / kTracePartSize; 26const int kTraceSize = kTracePartSize * kTraceParts; 27 28// Must fit into 3 bits. 29enum EventType { 30 EventTypeMop, 31 EventTypeFuncEnter, 32 EventTypeFuncExit, 33 EventTypeLock, 34 EventTypeUnlock, 35 EventTypeRLock, 36 EventTypeRUnlock 37}; 38 39// Represents a thread event (from most significant bit): 40// u64 typ : 3; // EventType. 41// u64 addr : 61; // Associated pc. 42typedef u64 Event; 43 44struct TraceHeader { 45 StackTrace stack0; // Start stack for the trace. 46 u64 epoch0; // Start epoch for the trace. 47 MutexSet mset0; 48#ifndef TSAN_GO 49 uptr stack0buf[kTraceStackSize]; 50#endif 51 52 TraceHeader() 53#ifndef TSAN_GO 54 : stack0(stack0buf, kTraceStackSize) 55#else 56 : stack0() 57#endif 58 , epoch0() { 59 } 60}; 61 62struct Trace { 63 TraceHeader headers[kTraceParts]; 64 Mutex mtx; 65 66 Trace() 67 : mtx(MutexTypeTrace, StatMtxTrace) { 68 } 69}; 70 71} // namespace __tsan 72 73#endif // TSAN_TRACE_H 74