DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Untracked file

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244
/* -*- 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) */