2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
//===-- 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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