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prgcleak.c
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is the Netscape Portable Runtime (NSPR).
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1999-2000
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Patrick Beard <beard@netscape.com>
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 /*
00040  * prgcleak.c
00041  */
00042 
00043 #ifdef GC_LEAK_DETECTOR
00044 
00045 /* for FILE */
00046 #include <stdio.h>
00047 
00048 /* NSPR stuff */
00049 #include "generic_threads.h"
00050 #include "primpl.h"
00051 
00052 extern FILE *GC_stdout, *GC_stderr;
00053 
00054 extern void GC_gcollect(void);
00055 extern void GC_clear_roots(void);
00056 
00057 static PRStatus PR_CALLBACK scanner(PRThread* t, void** baseAddr,
00058                                     PRUword count, void* closure)
00059 {
00060     if (count) {
00061         char* begin = (char*)baseAddr;
00062         char* end = (char*)(baseAddr + count);
00063         GC_mark_range_proc marker = (GC_mark_range_proc) closure;
00064         marker(begin, end);
00065     }
00066     return PR_SUCCESS;
00067 }
00068 
00069 static void mark_all_stacks(GC_mark_range_proc marker)
00070 {
00071     PR_ScanStackPointers(&scanner, (void *)marker);
00072 }
00073 
00074 #if defined(_PR_PTHREADS)
00075 #define _PR_MD_CURRENT_CPU() 1
00076 #endif
00077 
00078 static void locker(void* mutex)
00079 {
00080     if (_PR_MD_CURRENT_CPU())
00081         PR_EnterMonitor(mutex);
00082 }
00083 
00084 static void unlocker(void* mutex)
00085 {
00086     if (_PR_MD_CURRENT_CPU())
00087         PR_ExitMonitor(mutex);
00088 }
00089 
00090 static void stopper(void* unused)
00091 {
00092     if (_PR_MD_CURRENT_CPU())
00093         PR_SuspendAll();
00094 }
00095 
00096 static void starter(void* unused)
00097 {
00098     if (_PR_MD_CURRENT_CPU())
00099         PR_ResumeAll();
00100 }
00101 
00102 void _PR_InitGarbageCollector()
00103 {
00104     void* mutex;
00105 
00106     /* redirect GC's stderr to catch startup leaks. */
00107     GC_stderr = fopen("StartupLeaks", "w");
00108 
00109     mutex = PR_NewMonitor();
00110     PR_ASSERT(mutex != NULL);
00111 
00112     GC_generic_init_threads(&mark_all_stacks, mutex,
00113             &locker, &unlocker,
00114             &stopper, &starter);
00115 }
00116 
00117 void _PR_ShutdownGarbageCollector()
00118 {
00119     /* do anything you need to shut down the collector. */
00120 }
00121 
00122 #endif /* GC_LEAK_DETECTOR */