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Date:      Wed, 5 Feb 2003 13:24:47 +0100 (CET)
From:      Jonas Bulow <jonas@ark.servicefactory.se>
To:        FreeBSD-gnats-submit@FreeBSD.org
Subject:   i386/47950: rtld in ld.so will livelock in some circumsyances	
Message-ID:  <200302051224.h15COlxS079384@localhost.servicefactory.se>

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>Number:         47950
>Category:       i386
>Synopsis:       rtld in ld.so will livelock in some circumsyances
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Feb 05 04:30:11 PST 2003
>Closed-Date:
>Last-Modified:
>Originator:     Jonas Bulow
>Release:        FreeBSD 4.7-STABLE i386
>Organization:
>Environment:
System: FreeBSD localhost.servicefactory.se 4.7-STABLE FreeBSD 4.7-STABLE #23: Mon Feb 3 17:11:05 CET 2003 jonas@localhost.servicefactory.se:/usr/obj/usr/src/sys/TP i386

>Description:
A program compiled with -pthread will hang during startup if resources are low. Using gcore the following backtrace was extracted on such a process:

(gdb) bt
#0  0x280c5660 in _thread_sig_handle_pending () from /usr/lib/libc_r.so.4
#1  0x280c50eb in _thread_sig_handler () from /usr/lib/libc_r.so.4
#2  0xbfbfffac in ?? ()
#3  0x281000f8 in _thread_leave_cancellation_point () from /usr/lib/libc_r.so.4
#4  0x28100445 in _thread_leave_cancellation_point () from /usr/lib/libc_r.so.4
#5  0x28100b5d in malloc () from /usr/lib/libc_r.so.4
#6  0x280cbbd4 in _thread_init () from /usr/lib/libc_r.so.4
#7  0x2810157c in _thread_init_invoker::_thread_init_invoker () from /usr/lib/libc_r.so.4
#8  0x281015b5 in _thread_init_invoker::_thread_init_invoker () from /usr/lib/libc_r.so.4
#9  0x281015de in _thread_init_invoker::_thread_init_invoker () from /usr/lib/libc_r.so.4
#10 0x2810160c in _thread_init_invoker::_thread_init_invoker () from /usr/lib/libc_r.so.4
#11 0x28088caa in _init () from /usr/lib/libc_r.so.4
#12 0x2804f978 in _rtld () from /usr/libexec/ld-elf.so.1

The process is running and consumes CPU resources.

>How-To-Repeat:
	Run a program compiled with -pthread and dynamicly linked with other libraries in an environment with low memory resources.

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:

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