зеркало из https://github.com/mozilla/gecko-dev.git
270 строки
9.7 KiB
C++
270 строки
9.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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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class nsISupports;
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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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// Disable refcnt logging if we are in xpcom glue
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// Bug #151072
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#if defined(XPCOM_GLUE)
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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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#ifdef HAVE_CPP_DYNAMIC_CAST_TO_VOID_PTR // from autoconf (XXX needs to be
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// set for non-autoconf platforms)
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// nsCOMPtr.h allows these macros to be defined by clients
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// These logging functions require dynamic_cast<void *>, so we don't
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// define these macros if we don't have dynamic_cast.
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#define NSCAP_LOG_ASSIGNMENT(_c, _p) \
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if ((_p)) nsTraceRefcnt::LogAddCOMPtr((_c),NS_STATIC_CAST(nsISupports*,_p))
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#define NSCAP_RELEASE(_c, _p); \
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if ((_p)) { \
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nsTraceRefcnt::LogReleaseCOMPtr((_c),NS_STATIC_CAST(nsISupports*,_p)); \
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NS_RELEASE(_p); \
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}
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#endif /* HAVE_CPP_DYNAMIC_CAST_TO_VOID_PTR */
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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 mRefsOutstandingSquared;
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double mObjsOutstandingTotal;
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double mObjsOutstandingSquared;
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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 Startup();
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static NS_COM void Shutdown();
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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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static NS_COM void LogAddCOMPtr(void *aCOMPtr, nsISupports *aObject);
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static NS_COM void LogReleaseCOMPtr(void *aCOMPtr, nsISupports *aObject);
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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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* Tell nsTraceRefcnt whether refcounting, allocation, and destruction
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* activity is legal. This is used to trigger assertions for any such
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* activity that occurs because of static constructors or destructors.
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*/
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static NS_COM void SetActivityIsLegal(PRBool aLegal);
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};
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////////////////////////////////////////////////////////////////////////////////
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// And now for that utility that you've all been asking for...
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extern "C" NS_COM void
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NS_MeanAndStdDev(double n, double sumOfValues, double sumOfSquaredValues,
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double *meanResult, double *stdDevResult);
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////////////////////////////////////////////////////////////////////////////////
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#endif /* nsTraceRefcnt_h___ */
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