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76 lines
1.9 KiB
76 lines
1.9 KiB
4 months ago
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//===-- tsan_trace.h --------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of ThreadSanitizer (TSan), a race detector.
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//
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//===----------------------------------------------------------------------===//
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#ifndef TSAN_TRACE_H
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#define TSAN_TRACE_H
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#include "tsan_defs.h"
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#include "tsan_mutex.h"
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#include "tsan_stack_trace.h"
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#include "tsan_mutexset.h"
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namespace __tsan {
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const int kTracePartSizeBits = 13;
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const int kTracePartSize = 1 << kTracePartSizeBits;
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const int kTraceParts = 2 * 1024 * 1024 / kTracePartSize;
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const int kTraceSize = kTracePartSize * kTraceParts;
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// Must fit into 3 bits.
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enum EventType {
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EventTypeMop,
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EventTypeFuncEnter,
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EventTypeFuncExit,
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EventTypeLock,
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EventTypeUnlock,
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EventTypeRLock,
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EventTypeRUnlock
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};
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// Represents a thread event (from most significant bit):
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// u64 typ : 3; // EventType.
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// u64 addr : 61; // Associated pc.
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typedef u64 Event;
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const uptr kEventPCBits = 61;
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struct TraceHeader {
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#if !SANITIZER_GO
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BufferedStackTrace stack0; // Start stack for the trace.
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#else
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VarSizeStackTrace stack0;
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#endif
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u64 epoch0; // Start epoch for the trace.
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MutexSet mset0;
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TraceHeader() : stack0(), epoch0() {}
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};
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struct Trace {
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Mutex mtx;
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#if !SANITIZER_GO
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// Must be last to catch overflow as paging fault.
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// Go shadow stack is dynamically allocated.
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uptr shadow_stack[kShadowStackSize];
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#endif
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// Must be the last field, because we unmap the unused part in
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// CreateThreadContext.
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TraceHeader headers[kTraceParts];
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Trace()
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: mtx(MutexTypeTrace, StatMtxTrace) {
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}
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};
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} // namespace __tsan
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#endif // TSAN_TRACE_H
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