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500 lines
22 KiB
C
500 lines
22 KiB
C
3 weeks ago
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/* Copyright (c) 2008-2009, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ---
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* Author: Kostya Serebryany
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* Copied to CPython by Jeffrey Yasskin, with all macros renamed to
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* start with _Py_ to avoid colliding with users embedding Python, and
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* with deprecated macros removed.
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*/
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/* This file defines dynamic annotations for use with dynamic analysis
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tool such as valgrind, PIN, etc.
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Dynamic annotation is a source code annotation that affects
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the generated code (that is, the annotation is not a comment).
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Each such annotation is attached to a particular
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instruction and/or to a particular object (address) in the program.
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The annotations that should be used by users are macros in all upper-case
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(e.g., _Py_ANNOTATE_NEW_MEMORY).
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Actual implementation of these macros may differ depending on the
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dynamic analysis tool being used.
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See http://code.google.com/p/data-race-test/ for more information.
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This file supports the following dynamic analysis tools:
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- None (DYNAMIC_ANNOTATIONS_ENABLED is not defined or zero).
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Macros are defined empty.
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- ThreadSanitizer, Helgrind, DRD (DYNAMIC_ANNOTATIONS_ENABLED is 1).
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Macros are defined as calls to non-inlinable empty functions
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that are intercepted by Valgrind. */
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#ifndef __DYNAMIC_ANNOTATIONS_H__
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#define __DYNAMIC_ANNOTATIONS_H__
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#ifndef DYNAMIC_ANNOTATIONS_ENABLED
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# define DYNAMIC_ANNOTATIONS_ENABLED 0
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#endif
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#if DYNAMIC_ANNOTATIONS_ENABLED != 0
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/* -------------------------------------------------------------
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Annotations useful when implementing condition variables such as CondVar,
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using conditional critical sections (Await/LockWhen) and when constructing
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user-defined synchronization mechanisms.
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The annotations _Py_ANNOTATE_HAPPENS_BEFORE() and
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_Py_ANNOTATE_HAPPENS_AFTER() can be used to define happens-before arcs in
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user-defined synchronization mechanisms: the race detector will infer an
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arc from the former to the latter when they share the same argument
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pointer.
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Example 1 (reference counting):
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void Unref() {
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_Py_ANNOTATE_HAPPENS_BEFORE(&refcount_);
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if (AtomicDecrementByOne(&refcount_) == 0) {
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_Py_ANNOTATE_HAPPENS_AFTER(&refcount_);
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delete this;
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}
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}
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Example 2 (message queue):
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void MyQueue::Put(Type *e) {
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MutexLock lock(&mu_);
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_Py_ANNOTATE_HAPPENS_BEFORE(e);
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PutElementIntoMyQueue(e);
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}
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Type *MyQueue::Get() {
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MutexLock lock(&mu_);
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Type *e = GetElementFromMyQueue();
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_Py_ANNOTATE_HAPPENS_AFTER(e);
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return e;
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}
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Note: when possible, please use the existing reference counting and message
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queue implementations instead of inventing new ones. */
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/* Report that wait on the condition variable at address "cv" has succeeded
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and the lock at address "lock" is held. */
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#define _Py_ANNOTATE_CONDVAR_LOCK_WAIT(cv, lock) \
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AnnotateCondVarWait(__FILE__, __LINE__, cv, lock)
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/* Report that wait on the condition variable at "cv" has succeeded. Variant
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w/o lock. */
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#define _Py_ANNOTATE_CONDVAR_WAIT(cv) \
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AnnotateCondVarWait(__FILE__, __LINE__, cv, NULL)
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/* Report that we are about to signal on the condition variable at address
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"cv". */
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#define _Py_ANNOTATE_CONDVAR_SIGNAL(cv) \
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AnnotateCondVarSignal(__FILE__, __LINE__, cv)
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/* Report that we are about to signal_all on the condition variable at "cv". */
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#define _Py_ANNOTATE_CONDVAR_SIGNAL_ALL(cv) \
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AnnotateCondVarSignalAll(__FILE__, __LINE__, cv)
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/* Annotations for user-defined synchronization mechanisms. */
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#define _Py_ANNOTATE_HAPPENS_BEFORE(obj) _Py_ANNOTATE_CONDVAR_SIGNAL(obj)
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#define _Py_ANNOTATE_HAPPENS_AFTER(obj) _Py_ANNOTATE_CONDVAR_WAIT(obj)
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/* Report that the bytes in the range [pointer, pointer+size) are about
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to be published safely. The race checker will create a happens-before
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arc from the call _Py_ANNOTATE_PUBLISH_MEMORY_RANGE(pointer, size) to
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subsequent accesses to this memory.
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Note: this annotation may not work properly if the race detector uses
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sampling, i.e. does not observe all memory accesses.
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*/
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#define _Py_ANNOTATE_PUBLISH_MEMORY_RANGE(pointer, size) \
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AnnotatePublishMemoryRange(__FILE__, __LINE__, pointer, size)
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/* Instruct the tool to create a happens-before arc between mu->Unlock() and
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mu->Lock(). This annotation may slow down the race detector and hide real
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races. Normally it is used only when it would be difficult to annotate each
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of the mutex's critical sections individually using the annotations above.
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This annotation makes sense only for hybrid race detectors. For pure
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happens-before detectors this is a no-op. For more details see
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http://code.google.com/p/data-race-test/wiki/PureHappensBeforeVsHybrid . */
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#define _Py_ANNOTATE_PURE_HAPPENS_BEFORE_MUTEX(mu) \
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AnnotateMutexIsUsedAsCondVar(__FILE__, __LINE__, mu)
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/* -------------------------------------------------------------
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Annotations useful when defining memory allocators, or when memory that
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was protected in one way starts to be protected in another. */
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/* Report that a new memory at "address" of size "size" has been allocated.
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This might be used when the memory has been retrieved from a free list and
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is about to be reused, or when the locking discipline for a variable
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changes. */
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#define _Py_ANNOTATE_NEW_MEMORY(address, size) \
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AnnotateNewMemory(__FILE__, __LINE__, address, size)
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/* -------------------------------------------------------------
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Annotations useful when defining FIFO queues that transfer data between
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threads. */
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/* Report that the producer-consumer queue (such as ProducerConsumerQueue) at
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address "pcq" has been created. The _Py_ANNOTATE_PCQ_* annotations should
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be used only for FIFO queues. For non-FIFO queues use
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_Py_ANNOTATE_HAPPENS_BEFORE (for put) and _Py_ANNOTATE_HAPPENS_AFTER (for
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get). */
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#define _Py_ANNOTATE_PCQ_CREATE(pcq) \
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AnnotatePCQCreate(__FILE__, __LINE__, pcq)
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/* Report that the queue at address "pcq" is about to be destroyed. */
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#define _Py_ANNOTATE_PCQ_DESTROY(pcq) \
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AnnotatePCQDestroy(__FILE__, __LINE__, pcq)
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/* Report that we are about to put an element into a FIFO queue at address
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"pcq". */
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#define _Py_ANNOTATE_PCQ_PUT(pcq) \
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AnnotatePCQPut(__FILE__, __LINE__, pcq)
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/* Report that we've just got an element from a FIFO queue at address "pcq". */
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#define _Py_ANNOTATE_PCQ_GET(pcq) \
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AnnotatePCQGet(__FILE__, __LINE__, pcq)
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/* -------------------------------------------------------------
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Annotations that suppress errors. It is usually better to express the
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program's synchronization using the other annotations, but these can
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be used when all else fails. */
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/* Report that we may have a benign race at "pointer", with size
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"sizeof(*(pointer))". "pointer" must be a non-void* pointer. Insert at the
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point where "pointer" has been allocated, preferably close to the point
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where the race happens. See also _Py_ANNOTATE_BENIGN_RACE_STATIC. */
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#define _Py_ANNOTATE_BENIGN_RACE(pointer, description) \
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AnnotateBenignRaceSized(__FILE__, __LINE__, pointer, \
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sizeof(*(pointer)), description)
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/* Same as _Py_ANNOTATE_BENIGN_RACE(address, description), but applies to
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the memory range [address, address+size). */
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#define _Py_ANNOTATE_BENIGN_RACE_SIZED(address, size, description) \
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AnnotateBenignRaceSized(__FILE__, __LINE__, address, size, description)
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/* Request the analysis tool to ignore all reads in the current thread
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until _Py_ANNOTATE_IGNORE_READS_END is called.
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Useful to ignore intentional racey reads, while still checking
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other reads and all writes.
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See also _Py_ANNOTATE_UNPROTECTED_READ. */
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#define _Py_ANNOTATE_IGNORE_READS_BEGIN() \
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AnnotateIgnoreReadsBegin(__FILE__, __LINE__)
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/* Stop ignoring reads. */
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#define _Py_ANNOTATE_IGNORE_READS_END() \
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AnnotateIgnoreReadsEnd(__FILE__, __LINE__)
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/* Similar to _Py_ANNOTATE_IGNORE_READS_BEGIN, but ignore writes. */
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#define _Py_ANNOTATE_IGNORE_WRITES_BEGIN() \
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AnnotateIgnoreWritesBegin(__FILE__, __LINE__)
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/* Stop ignoring writes. */
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#define _Py_ANNOTATE_IGNORE_WRITES_END() \
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AnnotateIgnoreWritesEnd(__FILE__, __LINE__)
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/* Start ignoring all memory accesses (reads and writes). */
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#define _Py_ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN() \
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do {\
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_Py_ANNOTATE_IGNORE_READS_BEGIN();\
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_Py_ANNOTATE_IGNORE_WRITES_BEGIN();\
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}while(0)\
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/* Stop ignoring all memory accesses. */
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#define _Py_ANNOTATE_IGNORE_READS_AND_WRITES_END() \
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do {\
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_Py_ANNOTATE_IGNORE_WRITES_END();\
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_Py_ANNOTATE_IGNORE_READS_END();\
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}while(0)\
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/* Similar to _Py_ANNOTATE_IGNORE_READS_BEGIN, but ignore synchronization events:
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RWLOCK* and CONDVAR*. */
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#define _Py_ANNOTATE_IGNORE_SYNC_BEGIN() \
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AnnotateIgnoreSyncBegin(__FILE__, __LINE__)
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/* Stop ignoring sync events. */
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#define _Py_ANNOTATE_IGNORE_SYNC_END() \
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AnnotateIgnoreSyncEnd(__FILE__, __LINE__)
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/* Enable (enable!=0) or disable (enable==0) race detection for all threads.
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This annotation could be useful if you want to skip expensive race analysis
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during some period of program execution, e.g. during initialization. */
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#define _Py_ANNOTATE_ENABLE_RACE_DETECTION(enable) \
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AnnotateEnableRaceDetection(__FILE__, __LINE__, enable)
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/* -------------------------------------------------------------
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Annotations useful for debugging. */
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/* Request to trace every access to "address". */
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#define _Py_ANNOTATE_TRACE_MEMORY(address) \
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AnnotateTraceMemory(__FILE__, __LINE__, address)
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/* Report the current thread name to a race detector. */
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#define _Py_ANNOTATE_THREAD_NAME(name) \
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AnnotateThreadName(__FILE__, __LINE__, name)
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/* -------------------------------------------------------------
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Annotations useful when implementing locks. They are not
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normally needed by modules that merely use locks.
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The "lock" argument is a pointer to the lock object. */
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/* Report that a lock has been created at address "lock". */
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#define _Py_ANNOTATE_RWLOCK_CREATE(lock) \
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AnnotateRWLockCreate(__FILE__, __LINE__, lock)
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/* Report that the lock at address "lock" is about to be destroyed. */
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#define _Py_ANNOTATE_RWLOCK_DESTROY(lock) \
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AnnotateRWLockDestroy(__FILE__, __LINE__, lock)
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/* Report that the lock at address "lock" has been acquired.
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is_w=1 for writer lock, is_w=0 for reader lock. */
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#define _Py_ANNOTATE_RWLOCK_ACQUIRED(lock, is_w) \
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AnnotateRWLockAcquired(__FILE__, __LINE__, lock, is_w)
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/* Report that the lock at address "lock" is about to be released. */
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#define _Py_ANNOTATE_RWLOCK_RELEASED(lock, is_w) \
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AnnotateRWLockReleased(__FILE__, __LINE__, lock, is_w)
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/* -------------------------------------------------------------
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Annotations useful when implementing barriers. They are not
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normally needed by modules that merely use barriers.
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The "barrier" argument is a pointer to the barrier object. */
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/* Report that the "barrier" has been initialized with initial "count".
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If 'reinitialization_allowed' is true, initialization is allowed to happen
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multiple times w/o calling barrier_destroy() */
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#define _Py_ANNOTATE_BARRIER_INIT(barrier, count, reinitialization_allowed) \
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AnnotateBarrierInit(__FILE__, __LINE__, barrier, count, \
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reinitialization_allowed)
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/* Report that we are about to enter barrier_wait("barrier"). */
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#define _Py_ANNOTATE_BARRIER_WAIT_BEFORE(barrier) \
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AnnotateBarrierWaitBefore(__FILE__, __LINE__, barrier)
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/* Report that we just exited barrier_wait("barrier"). */
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#define _Py_ANNOTATE_BARRIER_WAIT_AFTER(barrier) \
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AnnotateBarrierWaitAfter(__FILE__, __LINE__, barrier)
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/* Report that the "barrier" has been destroyed. */
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#define _Py_ANNOTATE_BARRIER_DESTROY(barrier) \
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AnnotateBarrierDestroy(__FILE__, __LINE__, barrier)
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/* -------------------------------------------------------------
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Annotations useful for testing race detectors. */
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/* Report that we expect a race on the variable at "address".
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Use only in unit tests for a race detector. */
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#define _Py_ANNOTATE_EXPECT_RACE(address, description) \
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AnnotateExpectRace(__FILE__, __LINE__, address, description)
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/* A no-op. Insert where you like to test the interceptors. */
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#define _Py_ANNOTATE_NO_OP(arg) \
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AnnotateNoOp(__FILE__, __LINE__, arg)
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/* Force the race detector to flush its state. The actual effect depends on
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* the implementation of the detector. */
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#define _Py_ANNOTATE_FLUSH_STATE() \
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AnnotateFlushState(__FILE__, __LINE__)
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#else /* DYNAMIC_ANNOTATIONS_ENABLED == 0 */
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#define _Py_ANNOTATE_RWLOCK_CREATE(lock) /* empty */
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#define _Py_ANNOTATE_RWLOCK_DESTROY(lock) /* empty */
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#define _Py_ANNOTATE_RWLOCK_ACQUIRED(lock, is_w) /* empty */
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||
|
|
#define _Py_ANNOTATE_RWLOCK_RELEASED(lock, is_w) /* empty */
|
||
|
|
#define _Py_ANNOTATE_BARRIER_INIT(barrier, count, reinitialization_allowed) /* */
|
||
|
|
#define _Py_ANNOTATE_BARRIER_WAIT_BEFORE(barrier) /* empty */
|
||
|
|
#define _Py_ANNOTATE_BARRIER_WAIT_AFTER(barrier) /* empty */
|
||
|
|
#define _Py_ANNOTATE_BARRIER_DESTROY(barrier) /* empty */
|
||
|
|
#define _Py_ANNOTATE_CONDVAR_LOCK_WAIT(cv, lock) /* empty */
|
||
|
|
#define _Py_ANNOTATE_CONDVAR_WAIT(cv) /* empty */
|
||
|
|
#define _Py_ANNOTATE_CONDVAR_SIGNAL(cv) /* empty */
|
||
|
|
#define _Py_ANNOTATE_CONDVAR_SIGNAL_ALL(cv) /* empty */
|
||
|
|
#define _Py_ANNOTATE_HAPPENS_BEFORE(obj) /* empty */
|
||
|
|
#define _Py_ANNOTATE_HAPPENS_AFTER(obj) /* empty */
|
||
|
|
#define _Py_ANNOTATE_PUBLISH_MEMORY_RANGE(address, size) /* empty */
|
||
|
|
#define _Py_ANNOTATE_UNPUBLISH_MEMORY_RANGE(address, size) /* empty */
|
||
|
|
#define _Py_ANNOTATE_SWAP_MEMORY_RANGE(address, size) /* empty */
|
||
|
|
#define _Py_ANNOTATE_PCQ_CREATE(pcq) /* empty */
|
||
|
|
#define _Py_ANNOTATE_PCQ_DESTROY(pcq) /* empty */
|
||
|
|
#define _Py_ANNOTATE_PCQ_PUT(pcq) /* empty */
|
||
|
|
#define _Py_ANNOTATE_PCQ_GET(pcq) /* empty */
|
||
|
|
#define _Py_ANNOTATE_NEW_MEMORY(address, size) /* empty */
|
||
|
|
#define _Py_ANNOTATE_EXPECT_RACE(address, description) /* empty */
|
||
|
|
#define _Py_ANNOTATE_BENIGN_RACE(address, description) /* empty */
|
||
|
|
#define _Py_ANNOTATE_BENIGN_RACE_SIZED(address, size, description) /* empty */
|
||
|
|
#define _Py_ANNOTATE_PURE_HAPPENS_BEFORE_MUTEX(mu) /* empty */
|
||
|
|
#define _Py_ANNOTATE_MUTEX_IS_USED_AS_CONDVAR(mu) /* empty */
|
||
|
|
#define _Py_ANNOTATE_TRACE_MEMORY(arg) /* empty */
|
||
|
|
#define _Py_ANNOTATE_THREAD_NAME(name) /* empty */
|
||
|
|
#define _Py_ANNOTATE_IGNORE_READS_BEGIN() /* empty */
|
||
|
|
#define _Py_ANNOTATE_IGNORE_READS_END() /* empty */
|
||
|
|
#define _Py_ANNOTATE_IGNORE_WRITES_BEGIN() /* empty */
|
||
|
|
#define _Py_ANNOTATE_IGNORE_WRITES_END() /* empty */
|
||
|
|
#define _Py_ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN() /* empty */
|
||
|
|
#define _Py_ANNOTATE_IGNORE_READS_AND_WRITES_END() /* empty */
|
||
|
|
#define _Py_ANNOTATE_IGNORE_SYNC_BEGIN() /* empty */
|
||
|
|
#define _Py_ANNOTATE_IGNORE_SYNC_END() /* empty */
|
||
|
|
#define _Py_ANNOTATE_ENABLE_RACE_DETECTION(enable) /* empty */
|
||
|
|
#define _Py_ANNOTATE_NO_OP(arg) /* empty */
|
||
|
|
#define _Py_ANNOTATE_FLUSH_STATE() /* empty */
|
||
|
|
|
||
|
|
#endif /* DYNAMIC_ANNOTATIONS_ENABLED */
|
||
|
|
|
||
|
|
/* Use the macros above rather than using these functions directly. */
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
void AnnotateRWLockCreate(const char *file, int line,
|
||
|
|
const volatile void *lock);
|
||
|
|
void AnnotateRWLockDestroy(const char *file, int line,
|
||
|
|
const volatile void *lock);
|
||
|
|
void AnnotateRWLockAcquired(const char *file, int line,
|
||
|
|
const volatile void *lock, long is_w);
|
||
|
|
void AnnotateRWLockReleased(const char *file, int line,
|
||
|
|
const volatile void *lock, long is_w);
|
||
|
|
void AnnotateBarrierInit(const char *file, int line,
|
||
|
|
const volatile void *barrier, long count,
|
||
|
|
long reinitialization_allowed);
|
||
|
|
void AnnotateBarrierWaitBefore(const char *file, int line,
|
||
|
|
const volatile void *barrier);
|
||
|
|
void AnnotateBarrierWaitAfter(const char *file, int line,
|
||
|
|
const volatile void *barrier);
|
||
|
|
void AnnotateBarrierDestroy(const char *file, int line,
|
||
|
|
const volatile void *barrier);
|
||
|
|
void AnnotateCondVarWait(const char *file, int line,
|
||
|
|
const volatile void *cv,
|
||
|
|
const volatile void *lock);
|
||
|
|
void AnnotateCondVarSignal(const char *file, int line,
|
||
|
|
const volatile void *cv);
|
||
|
|
void AnnotateCondVarSignalAll(const char *file, int line,
|
||
|
|
const volatile void *cv);
|
||
|
|
void AnnotatePublishMemoryRange(const char *file, int line,
|
||
|
|
const volatile void *address,
|
||
|
|
long size);
|
||
|
|
void AnnotateUnpublishMemoryRange(const char *file, int line,
|
||
|
|
const volatile void *address,
|
||
|
|
long size);
|
||
|
|
void AnnotatePCQCreate(const char *file, int line,
|
||
|
|
const volatile void *pcq);
|
||
|
|
void AnnotatePCQDestroy(const char *file, int line,
|
||
|
|
const volatile void *pcq);
|
||
|
|
void AnnotatePCQPut(const char *file, int line,
|
||
|
|
const volatile void *pcq);
|
||
|
|
void AnnotatePCQGet(const char *file, int line,
|
||
|
|
const volatile void *pcq);
|
||
|
|
void AnnotateNewMemory(const char *file, int line,
|
||
|
|
const volatile void *address,
|
||
|
|
long size);
|
||
|
|
void AnnotateExpectRace(const char *file, int line,
|
||
|
|
const volatile void *address,
|
||
|
|
const char *description);
|
||
|
|
void AnnotateBenignRace(const char *file, int line,
|
||
|
|
const volatile void *address,
|
||
|
|
const char *description);
|
||
|
|
void AnnotateBenignRaceSized(const char *file, int line,
|
||
|
|
const volatile void *address,
|
||
|
|
long size,
|
||
|
|
const char *description);
|
||
|
|
void AnnotateMutexIsUsedAsCondVar(const char *file, int line,
|
||
|
|
const volatile void *mu);
|
||
|
|
void AnnotateTraceMemory(const char *file, int line,
|
||
|
|
const volatile void *arg);
|
||
|
|
void AnnotateThreadName(const char *file, int line,
|
||
|
|
const char *name);
|
||
|
|
void AnnotateIgnoreReadsBegin(const char *file, int line);
|
||
|
|
void AnnotateIgnoreReadsEnd(const char *file, int line);
|
||
|
|
void AnnotateIgnoreWritesBegin(const char *file, int line);
|
||
|
|
void AnnotateIgnoreWritesEnd(const char *file, int line);
|
||
|
|
void AnnotateEnableRaceDetection(const char *file, int line, int enable);
|
||
|
|
void AnnotateNoOp(const char *file, int line,
|
||
|
|
const volatile void *arg);
|
||
|
|
void AnnotateFlushState(const char *file, int line);
|
||
|
|
|
||
|
|
/* Return non-zero value if running under valgrind.
|
||
|
|
|
||
|
|
If "valgrind.h" is included into dynamic_annotations.c,
|
||
|
|
the regular valgrind mechanism will be used.
|
||
|
|
See http://valgrind.org/docs/manual/manual-core-adv.html about
|
||
|
|
RUNNING_ON_VALGRIND and other valgrind "client requests".
|
||
|
|
The file "valgrind.h" may be obtained by doing
|
||
|
|
svn co svn://svn.valgrind.org/valgrind/trunk/include
|
||
|
|
|
||
|
|
If for some reason you can't use "valgrind.h" or want to fake valgrind,
|
||
|
|
there are two ways to make this function return non-zero:
|
||
|
|
- Use environment variable: export RUNNING_ON_VALGRIND=1
|
||
|
|
- Make your tool intercept the function RunningOnValgrind() and
|
||
|
|
change its return value.
|
||
|
|
*/
|
||
|
|
int RunningOnValgrind(void);
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if DYNAMIC_ANNOTATIONS_ENABLED != 0 && defined(__cplusplus)
|
||
|
|
|
||
|
|
/* _Py_ANNOTATE_UNPROTECTED_READ is the preferred way to annotate racey reads.
|
||
|
|
|
||
|
|
Instead of doing
|
||
|
|
_Py_ANNOTATE_IGNORE_READS_BEGIN();
|
||
|
|
... = x;
|
||
|
|
_Py_ANNOTATE_IGNORE_READS_END();
|
||
|
|
one can use
|
||
|
|
... = _Py_ANNOTATE_UNPROTECTED_READ(x); */
|
||
|
|
template <class T>
|
||
|
|
inline T _Py_ANNOTATE_UNPROTECTED_READ(const volatile T &x) {
|
||
|
|
_Py_ANNOTATE_IGNORE_READS_BEGIN();
|
||
|
|
T res = x;
|
||
|
|
_Py_ANNOTATE_IGNORE_READS_END();
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
/* Apply _Py_ANNOTATE_BENIGN_RACE_SIZED to a static variable. */
|
||
|
|
#define _Py_ANNOTATE_BENIGN_RACE_STATIC(static_var, description) \
|
||
|
|
namespace { \
|
||
|
|
class static_var ## _annotator { \
|
||
|
|
public: \
|
||
|
|
static_var ## _annotator() { \
|
||
|
|
_Py_ANNOTATE_BENIGN_RACE_SIZED(&static_var, \
|
||
|
|
sizeof(static_var), \
|
||
|
|
# static_var ": " description); \
|
||
|
|
} \
|
||
|
|
}; \
|
||
|
|
static static_var ## _annotator the ## static_var ## _annotator;\
|
||
|
|
}
|
||
|
|
#else /* DYNAMIC_ANNOTATIONS_ENABLED == 0 */
|
||
|
|
|
||
|
|
#define _Py_ANNOTATE_UNPROTECTED_READ(x) (x)
|
||
|
|
#define _Py_ANNOTATE_BENIGN_RACE_STATIC(static_var, description) /* empty */
|
||
|
|
|
||
|
|
#endif /* DYNAMIC_ANNOTATIONS_ENABLED */
|
||
|
|
|
||
|
|
#endif /* __DYNAMIC_ANNOTATIONS_H__ */
|