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different fix for main proc bug

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This commit is contained in:
rsc 2005-02-14 18:58:56 +00:00
parent 8da6bca807
commit 8ee6ad4d96
3 changed files with 22 additions and 12 deletions
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32
src/libthread/thread.c
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@ -281,6 +281,24 @@ procscheduler(Proc *p)
Out:
_threaddebug("scheduler exit");
if(p->mainproc){
/*
* Stupid bug - on Linux 2.6 and maybe elsewhere,
* if the main thread exits then the others keep running
* but the process shows up as a zombie in ps and is not
* attachable with ptrace. We'll just sit around pretending
* to be a system proc instead of exiting.
*/
_threaddaemonize();
lock(&threadnproclock);
if(++threadnsysproc == threadnproc)
threadexitsall(p->msg);
p->sysproc = 1;
unlock(&threadnproclock);
for(;;)
sleep(1000);
}
delproc(p);
lock(&threadnproclock);
if(p->sysproc)
@ -298,7 +316,7 @@ _threadsetsysproc(void)
{
lock(&threadnproclock);
if(++threadnsysproc == threadnproc)
exit(0);
threadexitsall(nil);
unlock(&threadnproclock);
proc()->sysproc = 1;
}
@ -576,21 +594,13 @@ main(int argc, char **argv)
_pthreadinit();
p = procalloc();
p->mainproc = 1;
_threadsetproc(p);
if(mainstacksize == 0)
mainstacksize = 256*1024;
_threadcreate(p, threadmainstart, nil, mainstacksize);
procscheduler(p);
_threaddaemonize();
/*
* On Linux 2.6, if the main thread exits then the others
* keep running but the process shows up as a zombie in ps
* and is not attachable with ptrace. We'll just sit around
* instead of exiting.
*/
for(;;)
sleep(1000);
_threadpexit();
/* does not return */
return 0;
}