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* [Bug libgcj/14751] New: java program compiled with gcj never release system handle resources allocated by new threads on windows platform
@ 2004-03-27 12:58 alessandro dot pepi at email dot it
2004-03-27 15:41 ` [Bug libgcj/14751] [win32] " pinskia at gcc dot gnu dot org
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: alessandro dot pepi at email dot it @ 2004-03-27 12:58 UTC (permalink / raw)
To: gcc-bugs
A program compiled with gcj on Windows platform (i use the thisiscool
distribution) never release system handle resources allocated by new threads
until the main thread exit.
When a compiled java application create a new thread, the system allocate a
new thread handle and some other system handles. When the new thread exits the
thread handle is released but 3 other system handles (3 per thread) will be
released only when application terminate its execution. Below a java test
program that i have comiled whith the latest windows thisiscool distribution
of gcj:
import java.util.*;
public class TestThread {
public void createThread(final int j){
Runnable run = new Runnable(){
public void run(){
System.out.println("I am thread number "+j);
tsleep(2000,null);
};
};
try{
new Thread(run).start();
}catch(Exception e){
System.out.println(e.toString());
};
};
public void Test(){
for (int i = 0;i<100;i++){
createThread(i);
tsleep(250,null);
};
};
public static void tsleep(long t,String s){
if (s!=null)
System.out.println(s);
try{
Thread.sleep(t);
}catch(Exception e){
System.out.println(e.toString());
}
};
public static void main(String[] args) {
tsleep(5000,"Begin test : look at handles resource on Task Manager before
starting ");
TestThread test = new TestThread();
test.Test();
tsleep(1000,"executing garbage collector ...");
Runtime.getRuntime().runFinalization();
Runtime.getRuntime().gc();
tsleep(10000,"End test : now look again at handles resource on Task
Manager before exiting ");
}
};
--
Summary: java program compiled with gcj never release system
handle resources allocated by new threads on windows
platform
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcj
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: alessandro dot pepi at email dot it
CC: alessandro dot pepi at email dot it,gcc-bugs at gcc dot
gnu dot org,java-prs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14751
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libgcj/14751] [win32] java program compiled with gcj never release system handle resources allocated by new threads on windows platform
2004-03-27 12:58 [Bug libgcj/14751] New: java program compiled with gcj never release system handle resources allocated by new threads on windows platform alessandro dot pepi at email dot it
@ 2004-03-27 15:41 ` pinskia at gcc dot gnu dot org
2004-04-29 1:52 ` pinskia at gcc dot gnu dot org
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-03-27 15:41 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Summary|java program compiled with |[win32] java program
|gcj never release system |compiled with gcj never
|handle resources allocated |release system handle
|by new threads on windows |resources allocated by new
|platform |threads on windows platform
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14751
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libgcj/14751] [win32] java program compiled with gcj never release system handle resources allocated by new threads on windows platform
2004-03-27 12:58 [Bug libgcj/14751] New: java program compiled with gcj never release system handle resources allocated by new threads on windows platform alessandro dot pepi at email dot it
2004-03-27 15:41 ` [Bug libgcj/14751] [win32] " pinskia at gcc dot gnu dot org
@ 2004-04-29 1:52 ` pinskia at gcc dot gnu dot org
2004-04-29 1:54 ` pinskia at gcc dot gnu dot org
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-29 1:52 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-29 00:52 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-04-29 00:52:51
date| |
Version|unknown |3.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14751
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libgcj/14751] [win32] java program compiled with gcj never release system handle resources allocated by new threads on windows platform
2004-03-27 12:58 [Bug libgcj/14751] New: java program compiled with gcj never release system handle resources allocated by new threads on windows platform alessandro dot pepi at email dot it
2004-03-27 15:41 ` [Bug libgcj/14751] [win32] " pinskia at gcc dot gnu dot org
2004-04-29 1:52 ` pinskia at gcc dot gnu dot org
@ 2004-04-29 1:54 ` pinskia at gcc dot gnu dot org
2004-07-03 22:59 ` pinskia at gcc dot gnu dot org
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-29 1:54 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-29 00:52 -------
*** Bug 15195 has been marked as a duplicate of this bug. ***
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |ovidr at users dot
| |sourceforge dot net
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14751
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libgcj/14751] [win32] java program compiled with gcj never release system handle resources allocated by new threads on windows platform
2004-03-27 12:58 [Bug libgcj/14751] New: java program compiled with gcj never release system handle resources allocated by new threads on windows platform alessandro dot pepi at email dot it
` (2 preceding siblings ...)
2004-04-29 1:54 ` pinskia at gcc dot gnu dot org
@ 2004-07-03 22:59 ` pinskia at gcc dot gnu dot org
2004-09-10 16:15 ` [Bug libgcj/14751] [win32] thread creation leaks system handle resources ovidr at users dot sourceforge dot net
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-07-03 22:59 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-07-03 22:59 -------
*** Bug 16342 has been marked as a duplicate of this bug. ***
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |efly at javaresearch dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14751
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libgcj/14751] [win32] thread creation leaks system handle resources
2004-03-27 12:58 [Bug libgcj/14751] New: java program compiled with gcj never release system handle resources allocated by new threads on windows platform alessandro dot pepi at email dot it
` (3 preceding siblings ...)
2004-07-03 22:59 ` pinskia at gcc dot gnu dot org
@ 2004-09-10 16:15 ` ovidr at users dot sourceforge dot net
2004-09-10 18:12 ` ovidr at users dot sourceforge dot net
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: ovidr at users dot sourceforge dot net @ 2004-09-10 16:15 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From ovidr at users dot sourceforge dot net 2004-09-10 16:15 -------
I think the problem is more than just thread creation. I have ripped out the
syncExec code from SWT (Display.syncExec()), and only use three threads in a
loop.
It requires swt-win32-3062.dll (SWT 3 final) in the directory for
PostThreadMessage calls.
Handles seem to increase ad infinitum, and memory seems to grow slowly as well
(unlike sun's java) but I don't know if it is ever collected.
gcj -o threadswitch.exe -fjni --main=org.eclipse.swt.internal.win32.OS OS.java
I am using gcj 3.4.1 final (with or without Mohan's patch
http://gcc.gnu.org/ml/java/2004-09/msg00048.html) as well as:
gcc version 3.5.0 20040730 (experimental)
---
package org.eclipse.swt.internal.win32;
class OS implements Runnable {
public static final native int GetCurrentProcessId();
public static final native int GetCurrentThreadId();
public static final native boolean PostThreadMessageW(int idThread, int Msg,
int wParam, int lParam);
public static final native boolean PostThreadMessageA(int idThread, int Msg,
int wParam, int lParam);
public static final int WM_NULL = 0x0;
static {
System.loadLibrary("swt-win32-3062");
}
public static void main(String[] args) {
final OS t1 = new OS();
Thread t3 = new Thread() {
public void run() {
while (true) {
try {
t1.runAsyncMessages();
Thread.sleep(1);
} catch (Exception e) {
e.printStackTrace();
}
}
}
};
t3.start();
Thread t2 = new Thread() {
public void run() {
while (true) {
try {
System.out.println("Thread: " + Thread.currentThread());
t1.syncExec(t1);
Thread.sleep(1);
} catch (Exception e) {
e.printStackTrace();
}
}
}
};
t2.start();
}
Thread thread;
Object messageLock = new Object();
RunnableLock[] messages;
int messageCount;
int threadId;
int processId;
Thread syncThread;
public OS() {
threadId = GetCurrentThreadId();
processId = GetCurrentProcessId();
thread = Thread.currentThread();
System.out.println("Thread: " + Thread.currentThread());
}
public static final boolean PostThreadMessage(int idThread, int Msg, int
wParam, int lParam) {
// IsUnicode = !IsWin32s && !IsWin95;
// if (IsUnicode) return PostThreadMessageW (idThread, Msg, wParam,
lParam);
return PostThreadMessageA(idThread, Msg, wParam, lParam);
}
public void run() {
System.out.println("TS: " + Thread.currentThread());
}
boolean isValidThread() {
return thread == Thread.currentThread();
}
void wakeThread() {
PostThreadMessage(threadId, WM_NULL, 0, 0);
}
void addLast(RunnableLock lock) {
synchronized (messageLock) {
if (messages == null)
messages = new RunnableLock[4];
if (messageCount == messages.length) {
RunnableLock[] newMessages = new RunnableLock[messageCount + 4];
System.arraycopy(messages, 0, newMessages, 0, messageCount);
messages = newMessages;
}
messages[messageCount++] = lock;
if (messageCount == 1)
this.wakeThread();
}
}
protected void syncExec(Runnable runnable) {
if (this.isValidThread()) {
if (runnable != null)
runnable.run();
return;
}
if (runnable == null) {
// display.wake();
return;
}
RunnableLock lock = new RunnableLock(runnable);
/*
* Only remember the syncThread for syncExec.
*/
lock.thread = Thread.currentThread();
synchronized (lock) {
addLast(lock);
boolean interrupted = false;
while (!lock.done()) {
try {
lock.wait();
} catch (InterruptedException e) {
interrupted = true;
}
}
if (interrupted) {
Thread.currentThread().interrupt();
}
if (lock.throwable != null) {
System.err.println("Throwable != null");
}
}
}
boolean runAsyncMessages() {
if (messageCount == 0)
return false;
RunnableLock lock = removeFirst();
if (lock == null)
return true;
synchronized (lock) {
syncThread = lock.thread;
try {
lock.run();
} catch (Throwable t) {
lock.throwable = t;
System.err.println("FAILED EXEC");
} finally {
syncThread = null;
lock.notifyAll();
}
}
return true;
}
RunnableLock removeFirst() {
synchronized (messageLock) {
if (messageCount == 0)
return null;
RunnableLock lock = messages[0];
System.arraycopy(messages, 1, messages, 0, --messageCount);
messages[messageCount] = null;
if (messageCount == 0)
messages = null;
return lock;
}
}
class RunnableLock {
Runnable runnable;
Thread thread;
Throwable throwable;
RunnableLock(Runnable runnable) {
this.runnable = runnable;
}
boolean done() {
return runnable == null || throwable != null;
}
void run() {
if (runnable != null)
runnable.run();
runnable = null;
}
}
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14751
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libgcj/14751] [win32] thread creation leaks system handle resources
2004-03-27 12:58 [Bug libgcj/14751] New: java program compiled with gcj never release system handle resources allocated by new threads on windows platform alessandro dot pepi at email dot it
` (4 preceding siblings ...)
2004-09-10 16:15 ` [Bug libgcj/14751] [win32] thread creation leaks system handle resources ovidr at users dot sourceforge dot net
@ 2004-09-10 18:12 ` ovidr at users dot sourceforge dot net
2004-09-11 19:14 ` cvs-commit at gcc dot gnu dot org
2004-09-11 19:32 ` pinskia at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: ovidr at users dot sourceforge dot net @ 2004-09-10 18:12 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From ovidr at users dot sourceforge dot net 2004-09-10 18:12 -------
swt-win32-3062.dll and source are here:
ftp://download.eclipse.org/R-3.0-200406251208/swt-3.0-win32.zip
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14751
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libgcj/14751] [win32] thread creation leaks system handle resources
2004-03-27 12:58 [Bug libgcj/14751] New: java program compiled with gcj never release system handle resources allocated by new threads on windows platform alessandro dot pepi at email dot it
` (5 preceding siblings ...)
2004-09-10 18:12 ` ovidr at users dot sourceforge dot net
@ 2004-09-11 19:14 ` cvs-commit at gcc dot gnu dot org
2004-09-11 19:32 ` pinskia at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-09-11 19:14 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-09-11 19:14 -------
Subject: Bug 14751
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: membar@gcc.gnu.org 2004-09-11 19:13:51
Modified files:
libjava : ChangeLog win32-threads.cc
libjava/include: win32-threads.h
Log message:
PR libgcj/14751
* win32-threads.cc (_Jv_ThreadInitData): Zero out thread
handle in newly-allocated _Jv_Thread_t.
(_Jv_ThreadDestroyData): Close thread handle.
(_Jv_ThreadStart): Remove obsolete comment.
Store handle of newly-created thread in _Jv_Thread_t.
* include/win32-threads.h: #define WIN32_LEAN_AND_MEAN
before including <windows.h>
#define _Jv_HaveCondDestroy
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libjava/ChangeLog.diff?cvsroot=gcc&r1=1.3050&r2=1.3051
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libjava/win32-threads.cc.diff?cvsroot=gcc&r1=1.11&r2=1.12
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libjava/include/win32-threads.h.diff?cvsroot=gcc&r1=1.9&r2=1.10
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14751
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libgcj/14751] [win32] thread creation leaks system handle resources
2004-03-27 12:58 [Bug libgcj/14751] New: java program compiled with gcj never release system handle resources allocated by new threads on windows platform alessandro dot pepi at email dot it
` (6 preceding siblings ...)
2004-09-11 19:14 ` cvs-commit at gcc dot gnu dot org
@ 2004-09-11 19:32 ` pinskia at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-09-11 19:32 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-09-11 19:32 -------
Fixed for 4.0.0.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14751
^ permalink raw reply [flat|nested] 9+ messages in thread
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2004-03-27 12:58 [Bug libgcj/14751] New: java program compiled with gcj never release system handle resources allocated by new threads on windows platform alessandro dot pepi at email dot it
2004-03-27 15:41 ` [Bug libgcj/14751] [win32] " pinskia at gcc dot gnu dot org
2004-04-29 1:52 ` pinskia at gcc dot gnu dot org
2004-04-29 1:54 ` pinskia at gcc dot gnu dot org
2004-07-03 22:59 ` pinskia at gcc dot gnu dot org
2004-09-10 16:15 ` [Bug libgcj/14751] [win32] thread creation leaks system handle resources ovidr at users dot sourceforge dot net
2004-09-10 18:12 ` ovidr at users dot sourceforge dot net
2004-09-11 19:14 ` cvs-commit at gcc dot gnu dot org
2004-09-11 19:32 ` pinskia at gcc dot gnu dot org
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