Bug#212697: marked as done (static linking with lpthread and system call causes crash)
Your message dated Fri, 05 Aug 2005 19:15:42 +0900
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and subject line Close bugs tagged as woody
has caused the attached Bug report to be marked as done.
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Subject: static linking with lpthread and system call causes crash
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Package: libc6-dev
Version: 2.2.5-11.2
Description: a system function call within a pthread (when statically
linked) ends the program but leaves the processus zombified
The same problem does not occur on unstable systems (with libc6 2.3.2-4)
Here is a test program that demonstrates the problem, it consists of a
main function which calls ThreadFunction which itself calls system(const
char*).
/* test.c */
#include <stdlib.h>
#include <pthread.h>
#include <stdio.h>
void* ThreadFunction(void* arg)
{
printf("Thread Started\n");
system("ls -l");
printf("Thread Stopping\n");
return NULL;
}
int main(int argc, char** argv)
{
pthread_t thread;
void* result;
pthread_create(&thread, NULL, ThreadFunction, NULL);
pthread_join(thread, &result);
return 0;
}
/* END test.c
example of dynamic linking:
# gcc test.c -lpthread -o test
# ldd test
libpthread.so.0 => /lib/lipthread.so (0x40017000)
libc.so.6 => /lib/libc.so.6 (0x4002b000)
/lib/ld-linux.so.2 => (0x40000000)
# ./test
Thread Started
... (output of ls -l)
Thread Stopping
// CORRECT BEHAVIOUR
example of static linkinkg:
# gcc test.c -static -lpthread -o test
# ldd test
not a dynamic executable
# ./test
Thread Started
# ps aux | grep test
root 20027 0.0 0.1 2548 160 pts/1 S 13:26 ./test
root 20028 0.0 0.1 2548 160 pts/1 S 13:26 ./test
// after launching ./test, Thread Started is printed out, but the
command prompt shows up immediately and ps sees the processus still running.
if i do this on a machine running 2.3.2-4 or gentoo using 2.3.2 as
well, the problem does not occur...
i used diiferent compilers with no noticeable change:
# dpkg -l gcc*
ii gcc-2.95 2.95.4-7
ii gcc-3.0 3.0.4-7
is this a bug?
is this backportable from the 2.3 series?
oh by the way, uname -a shows 2.4.18-586tsc but fails as well on 2.4.21
(homemade) and 2.4.22 (gentoo).
Severity: unknown (annoying to me)
have a nice day,
Gabriel Biberian
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Date: Fri, 05 Aug 2005 19:15:42 +0900
Message-ID: <[🔎] 81psssu1td.wl%gotom@debian.or.jp>
From: GOTO Masanori <gotom@debian.org>
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debian-glibc@lists.debian.org
Subject: Close bugs tagged as woody
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These bugs are tagged as woody, because they're well-known problems
and for keeping open to come to light what the problem is. However,
as you know, sarge was released. Our stable version was moved from
woody to sarge. It's high time to close old woody's bugs that are
still open. Now I close these bugs. If you have any objections to
close them, please reopen and let us know your trouble.
Regards,
-- gotom
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