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//===-- 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 = 14;
const int kTracePartSize = 1 << kTracePartSizeBits;
const int kTraceParts = 4 * 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;
struct TraceHeader {
StackTrace stack0; // Start stack for the trace.
u64 epoch0; // Start epoch for the trace.
MutexSet mset0;
#ifndef TSAN_GO
uptr stack0buf[kTraceStackSize];
#endif
TraceHeader()
#ifndef TSAN_GO
: stack0(stack0buf, kTraceStackSize)
#else
: stack0()
#endif
, epoch0() {
}
};
struct Trace {
TraceHeader headers[kTraceParts];
Mutex mtx;
#ifndef TSAN_GO
// Must be last to catch overflow as paging fault.
// Go shadow stack is dynamically allocated.
uptr shadow_stack[kShadowStackSize];
#endif
Trace()
: mtx(MutexTypeTrace, StatMtxTrace) {
}
};
} // namespace __tsan
#endif // TSAN_TRACE_H
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