RetroZilla/xpcom/base/nsLeakDetector.cpp

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2015-10-21 05:03:22 +02:00
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Mozilla browser.
*
* The Initial Developer of the Original Code is
* Netscape Communications, Inc.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Patrick C. Beard <beard@netscape.com>
* Scott Collins <scc@mozilla.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#if defined(GC_LEAK_DETECTOR)
#include "nsLeakDetector.h"
#include "nsCOMPtr.h"
#include "nsIComponentManager.h"
#include "nsIServiceManager.h"
#include "nsIGenericFactory.h"
#include "nsILeakDetector.h"
#include "nsICollection.h"
#include <stdio.h>
#include <time.h>
#include "gc.h"
extern "C" {
extern FILE *GC_stdout, *GC_stderr;
extern void GC_trace_object(GC_PTR object, int verbose);
extern void GC_mark_object(GC_PTR object, GC_word mark);
}
static nsresult nextLeakFile()
{
if (GC_stderr != NULL)
fclose(GC_stderr);
// generate a time stamped report name.
time_t timer;
time(&timer);
tm* now = localtime(&timer);
char reportName[256];
sprintf(reportName, "Leaks%02d%02d%02d",
now->tm_hour, now->tm_min, now->tm_sec);
GC_stderr = fopen(reportName, "w");
return NS_OK;
}
static FILE* openTraceFile()
{
// generate a time stamped report name.
time_t timer;
time(&timer);
tm* now = localtime(&timer);
char reportName[256];
sprintf(reportName, "Trace%02d%02d%02d",
now->tm_hour, now->tm_min, now->tm_sec);
return fopen(reportName, "w");
}
class nsLeakDetector : public nsILeakDetector {
public:
nsLeakDetector();
NS_DECL_ISUPPORTS
NS_DECL_NSILEAKDETECTOR
private:
~nsLeakDetector() {}
};
NS_IMPL_ISUPPORTS1(nsLeakDetector, nsILeakDetector)
nsLeakDetector::nsLeakDetector() {
}
NS_METHOD nsLeakDetector::DumpLeaks()
{
GC_gcollect();
return nextLeakFile();
}
NS_METHOD nsLeakDetector::TraceObject(nsISupports* object, PRBool verbose)
{
FILE* trace = openTraceFile();
if (trace != NULL) {
FILE* old_stderr = GC_stderr;
GC_stderr = trace;
GC_trace_object(object, (verbose ? 1 : 0));
GC_stderr = old_stderr;
fclose(trace);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
NS_METHOD nsLeakDetector::TraceCollection(nsICollection* objects, PRBool verbose)
{
PRUint32 count;
if (NS_FAILED(objects->Count(&count)))
return NS_ERROR_FAILURE;
nsCOMPtr<nsISupports>* elements = new nsCOMPtr<nsISupports>[count];
if (elements == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
for (PRUint32 i = 0; i < count; ++i)
objects->GetElementAt(i, getter_AddRefs(elements[i]));
nsresult rv = NS_ERROR_FAILURE;
FILE* trace = openTraceFile();
if (trace != NULL) {
FILE* old_stderr = GC_stderr;
GC_stderr = trace;
GC_trace_object(elements, (verbose ? 1 : 0));
GC_stderr = old_stderr;
fclose(trace);
rv = NS_OK;
}
delete[] elements;
return rv;
}
NS_METHOD nsLeakDetector::MarkObject(nsISupports* object, PRBool marked)
{
GC_mark_object(object, (marked ? 1 : 0));
return NS_OK;
}
NS_METHOD nsLeakDetector::GetServices(nsISupports* *result)
{
return NS_GetServiceManager((nsIServiceManager**)result);
}
#define NS_CLEAKDETECTOR_CID_STR "bb1ba360-1dd1-11b2-b30e-aa2314429f54"
#define NS_CLEAKDETECTOR_CID {0xbb1ba360, 0x1dd1, 0x11b2, {0xb3, 0x0e, 0xaa, 0x23, 0x14, 0x42, 0x9f, 0x54}}
#define NS_CLEAKDETECTOR_CONTRACTID "@mozilla.org/xpcom/leakdetector;1"
NS_GENERIC_FACTORY_CONSTRUCTOR(nsLeakDetector)
static NS_DEFINE_CID(kCLeakDetectorCID, NS_CLEAKDETECTOR_CID);
nsresult NS_InitLeakDetector()
{
nsresult rv;
// open the first leak file.
rv = nextLeakFile();
if (NS_FAILED(rv))
return rv;
static const nsModuleComponentInfo info = {
"Leak Detector", kCLeakDetectorCID, NS_CLEAKDETECTOR_CONTRACTID, nsLeakDetectorConstructor
};
// create a generic factory for the leak detector.
nsCOMPtr<nsIGenericFactory> factory;
rv = NS_NewGenericFactory(getter_AddRefs(factory), &info);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIComponentRegistrar> registrar;
NS_GetComponentRegistrar(getter_AddRefs(registrar));
return registrar->RegisterFactory(info.mCID, info.mDescription, info.mContractID, factory);
}
#undef SHUTDOWN_LEAKS_EARLY
#undef SHUTDOWN_LEAKS_MEDIUM
#define SHUTDOWN_LEAKS_LATE
class LeakDetectorFinalizer
{
public:
~LeakDetectorFinalizer();
};
#ifdef SHUTDOWN_LEAKS_LATE
// do shutdown leaks when XPCOM library is unloaded
LeakDetectorFinalizer gLeakDetectorFinalizer;
#endif
LeakDetectorFinalizer::~LeakDetectorFinalizer()
{
GC_gcollect();
#if 0
nextLeakFile();
if (GC_stdout != NULL) {
fprintf(GC_stdout, "ShutDown Leaks\n");
GC_clear_roots();
GC_gcollect();
}
#endif
}
nsresult NS_ShutdownLeakDetector()
{
#if defined(SHUTDOWN_LEAKS_MEDIUM)
// Make this the first atexit() called so it's before the atexit() crashes
// see http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=23552
static LeakDetectorFinalizer trick;
#elif defined(SHUTDOWN_LEAKS_EARLY)
// do shutdown leaks now
LeakDetectorFinalizer trick;
#endif
return NS_OK;
}
#endif /* defined(GC_LEAK_DETECTOR) */