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[Bug threads/10970] New: GDB hangs when main thread does pthread_exit
- From: "ppluzhnikov at google dot com" <sourceware-bugzilla at sourceware dot org>
- To: gdb-prs at sourceware dot org
- Date: 17 Nov 2009 05:35:16 -0000
- Subject: [Bug threads/10970] New: GDB hangs when main thread does pthread_exit
- Reply-to: sourceware-bugzilla at sourceware dot org
Test case:
--- cut ---
#include <stdio.h>
#include <pthread.h>
#include <unistd.h>
void *
fn (void *p)
{
int i;
printf ("thread %p\n", (void *) pthread_self ());
for (i = 0; i < 60; ++i)
{
printf ("i = %d\n", i);
sleep (1);
}
printf ("thread %p done\n", (void *) pthread_self ());
return NULL;
}
int main ()
{
pthread_t tid;
pthread_create (&tid, NULL, fn, NULL);
pthread_exit (0);
}
--- cut ---
gcc -g -pthread hang.c -o hang
gdb-cvs -nx ./hang
NU gdb (GDB) 7.0.50.20091116-cvs
...
This GDB was configured as "x86_64-unknown-linux-gnu".
...
Reading symbols from /usr/local/google/tmp/hang...done.
(gdb) run
Starting program: /usr/local/google/tmp/hang
[Thread debugging using libthread_db enabled]
[New Thread 0x40800950 (LWP 1540)]
thread 0x40800950
i = 0
i = 1
i = 2
i = 3
i = 4
<<< hit Control-C here; the counter stops, but there is no GDB prompt.
The only way to "recover" is "killall -9 gdb-cvs" in another window, at which
point inferior resumes (in the background):
i = 5
Killed
$ i = 6
i = 7
i = 8
...
--
Summary: GDB hangs when main thread does pthread_exit
Product: gdb
Version: 6.8
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: threads
AssignedTo: unassigned at sourceware dot org
ReportedBy: ppluzhnikov at google dot com
CC: gdb-prs at sourceware dot org
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://sourceware.org/bugzilla/show_bug.cgi?id=10970
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