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https://github.com/mozilla/gecko-dev.git
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a03bdd0283
- The stack walking code now works on windows. We were initializing the symbol handler on each DLL load which was resetting its symbol tables. Now, we don't re-init the symbol handler repeatedly. - Added support for an environment variable, XPCOM_REFCNT_LOG_ENABLE_VIA_PREF. When this is set to 1, refcount logging is done based on whether the "Enable XPCOM refcount log" pref in the Debug pane is set. If this is not set, refcount logging is not affected by the pref.
206 lines
7.0 KiB
C++
206 lines
7.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef nsTraceRefcnt_h___
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#define nsTraceRefcnt_h___
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#include "nsCom.h"
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#include <stdio.h>
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// Normaly, the implementation of NS_LOG_ADDREF and NS_LOG_RELEASE
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// will use a stack crawl to determine who called Addref/Release on an
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// xpcom object. If your platform can't implement a stack crawling
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// function, then define this to symbol. When the symbol is defined
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// then the NS_LOG_ADDREF_CALL and NS_LOG_RELEASE_CALL will expand
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// differently.
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#undef NS_LOSING_ARCHITECTURE
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// By default refcnt logging is not part of the build.
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#undef NS_BUILD_REFCNT_LOGGING
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#if (defined(DEBUG) || defined(FORCE_BUILD_REFCNT_LOGGING))
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// Make refcnt logging part of the build. This doesn't mean that
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// actual logging will occur (that requires a seperate enable; see
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// nsTraceRefcnt.h for more information).
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#define NS_BUILD_REFCNT_LOGGING 1
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#endif
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// If NO_BUILD_REFCNT_LOGGING is defined then disable refcnt logging
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// in the build. This overrides FORCE_BUILD_REFCNT_LOGGING.
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#if defined(NO_BUILD_REFCNT_LOGGING)
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#undef NS_BUILD_REFCNT_LOGGING
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#endif
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#ifdef NS_BUILD_REFCNT_LOGGING
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#define NS_LOG_ADDREF(_p, _rc, _type, _size) \
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nsTraceRefcnt::LogAddRef((_p), (_rc), (_type), (PRUint32) (_size))
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#define NS_LOG_RELEASE(_p, _rc, _type) \
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nsTraceRefcnt::LogRelease((_p), (_rc), (_type))
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#ifdef NS_LOSING_ARCHITECTURE
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#define NS_LOG_ADDREF_CALL(_p,_rc,_file,_line) \
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nsTraceRefcnt::LogAddRefCall((_p), (_rc), (_file), (_line))
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#define NS_LOG_RELEASE_CALL(_p,_rc,_file,_line) \
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nsTraceRefcnt::LogReleaseCall((_p), (_rc), (_file), (_line))
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#define NS_LOG_NEW_XPCOM(_p,_type,_size,_file,_line) \
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nsTraceRefcnt::LogNewXPCOM((_p),(_type),(PRUint32)(_size),(_file),(_line))
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#define NS_LOG_DELETE_XPCOM(_p,_file,_line) \
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nsTraceRefcnt::LogDeleteXPCOM((_p),(_file),(_line))
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#else
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#define NS_LOG_ADDREF_CALL(_p,_rc,_file,_line) _rc
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#define NS_LOG_RELEASE_CALL(_p,_rc,_file,_line) _rc
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#define NS_LOG_NEW_XPCOM(_p,_type,_size,_file,_line)
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#define NS_LOG_DELETE_XPCOM(_p,_file,_line)
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#endif
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#define MOZ_DECL_CTOR_COUNTER(_type)
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#define MOZ_COUNT_CTOR(_type) \
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PR_BEGIN_MACRO \
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nsTraceRefcnt::LogCtor((void*)this, #_type, sizeof(*this)); \
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PR_END_MACRO
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#define MOZ_COUNT_DTOR(_type) \
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PR_BEGIN_MACRO \
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nsTraceRefcnt::LogDtor((void*)this, #_type, sizeof(*this)); \
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PR_END_MACRO
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#else /* !NS_BUILD_REFCNT_LOGGING */
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#define NS_LOG_ADDREF(_p, _rc, _type, _size)
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#define NS_LOG_RELEASE(_p, _rc, _type)
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#define NS_LOG_NEW_XPCOM(_p,_type,_size,_file,_line)
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#define NS_LOG_DELETE_XPCOM(_p,_file,_line)
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#define NS_LOG_ADDREF_CALL(_p,_rc,_file,_line) _rc
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#define NS_LOG_RELEASE_CALL(_p,_rc,_file,_line) _rc
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#define MOZ_DECL_CTOR_COUNTER(_type)
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#define MOZ_COUNT_CTOR(_type)
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#define MOZ_COUNT_DTOR(_type)
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#endif /* NS_BUILD_REFCNT_LOGGING */
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//----------------------------------------------------------------------
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struct nsTraceRefcntStats {
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nsrefcnt mAddRefs;
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nsrefcnt mReleases;
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nsrefcnt mCreates;
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nsrefcnt mDestroys;
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double mRefsOutstandingTotal;
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double mRefsOutstandingVariance;
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double mObjsOutstandingTotal;
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double mObjsOutstandingVariance;
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};
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// Function type used by GatherStatistics. For each type that data has
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// been gathered for, this function is called with the counts of the
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// various operations that have been logged. The function can return
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// PR_FALSE if the gathering should stop.
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//
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// aCurrentStats is the current value of the counters. aPrevStats is
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// the previous value of the counters which is established by the
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// nsTraceRefcnt::SnapshotStatistics call.
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typedef PRBool (PR_CALLBACK *nsTraceRefcntStatFunc)
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(const char* aTypeName,
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PRUint32 aInstanceSize,
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nsTraceRefcntStats* aCurrentStats,
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nsTraceRefcntStats* aPrevStats,
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void *aClosure);
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/**
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* Note: The implementations for these methods are no-ops in a build
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* where NS_BUILD_REFCNT_LOGGING is disabled.
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*/
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class nsTraceRefcnt {
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public:
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static NS_COM void LogAddRef(void* aPtr,
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nsrefcnt aNewRefCnt,
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const char* aTypeName,
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PRUint32 aInstanceSize);
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static NS_COM void LogRelease(void* aPtr,
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nsrefcnt aNewRefCnt,
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const char* aTypeName);
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static NS_COM void LogNewXPCOM(void* aPtr,
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const char* aTypeName,
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PRUint32 aInstanceSize,
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const char* aFile,
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int aLine);
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static NS_COM void LogDeleteXPCOM(void* aPtr,
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const char* aFile,
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int aLine);
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static NS_COM nsrefcnt LogAddRefCall(void* aPtr,
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nsrefcnt aNewRefcnt,
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const char* aFile,
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int aLine);
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static NS_COM nsrefcnt LogReleaseCall(void* aPtr,
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nsrefcnt aNewRefcnt,
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const char* aFile,
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int aLine);
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static NS_COM void LogCtor(void* aPtr, const char* aTypeName,
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PRUint32 aInstanceSize);
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static NS_COM void LogDtor(void* aPtr, const char* aTypeName,
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PRUint32 aInstanceSize);
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enum StatisticsType {
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ALL_STATS,
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NEW_STATS
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};
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static NS_COM nsresult DumpStatistics(StatisticsType type = ALL_STATS,
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FILE* out = 0);
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static NS_COM void ResetStatistics(void);
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static NS_COM void GatherStatistics(nsTraceRefcntStatFunc aFunc,
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void* aClosure);
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static NS_COM void LoadLibrarySymbols(const char* aLibraryName,
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void* aLibrayHandle);
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static NS_COM void DemangleSymbol(const char * aSymbol,
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char * aBuffer,
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int aBufLen);
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static NS_COM void WalkTheStack(FILE* aStream);
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static NS_COM void SetPrefServiceAvailability(PRBool avail);
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};
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#endif /* nsTraceRefcnt_h___ */
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