//===-- tsan_trace.h --------------------------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file is a part of ThreadSanitizer (TSan), a race detector. // //===----------------------------------------------------------------------===// #ifndef TSAN_TRACE_H #define TSAN_TRACE_H #include "tsan_defs.h" #include "tsan_mutex.h" #include "tsan_stack_trace.h" #include "tsan_mutexset.h" namespace __tsan { const int kTracePartSizeBits = 13; const int kTracePartSize = 1 << kTracePartSizeBits; const int kTraceParts = 2 * 1024 * 1024 / kTracePartSize; const int kTraceSize = kTracePartSize * kTraceParts; // Must fit into 3 bits. enum EventType { EventTypeMop, EventTypeFuncEnter, EventTypeFuncExit, EventTypeLock, EventTypeUnlock, EventTypeRLock, EventTypeRUnlock }; // Represents a thread event (from most significant bit): // u64 typ : 3; // EventType. // u64 addr : 61; // Associated pc. typedef u64 Event; const uptr kEventPCBits = 61; struct TraceHeader { #if !SANITIZER_GO BufferedStackTrace stack0; // Start stack for the trace. #else VarSizeStackTrace stack0; #endif u64 epoch0; // Start epoch for the trace. MutexSet mset0; TraceHeader() : stack0(), epoch0() {} }; struct Trace { Mutex mtx; #if !SANITIZER_GO // Must be last to catch overflow as paging fault. // Go shadow stack is dynamically allocated. uptr shadow_stack[kShadowStackSize]; #endif // Must be the last field, because we unmap the unused part in // CreateThreadContext. TraceHeader headers[kTraceParts]; Trace() : mtx(MutexTypeTrace, StatMtxTrace) { } }; } // namespace __tsan #endif // TSAN_TRACE_H