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[Qemu-devel] [Bug 1357206] Re: QEMU user mode still crashes in multi-thr
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [Bug 1357206] Re: QEMU user mode still crashes in multi-thread code. |
Date: |
Fri, 17 Jun 2016 16:47:03 -0000 |
This test case now works for me, so I think we have resolved the bug
that was showing up here.
** Changed in: qemu
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1357206
Title:
QEMU user mode still crashes in multi-thread code.
Status in QEMU:
Fix Committed
Bug description:
I compiled the qemu 2.0 release source and find out qemu crashing when
emulating multi-thread code in user mode.
I did a little search and found LP:668799 but it is far from now and
it is probably not the problem here.
I used program below as the test program:
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
void *print_message_function( void *ptr );
main()
{
pthread_t thread1, thread2;
const char *message1 = "Thread 1";
const char *message2 = "Thread 2";
int iret1, iret2;
/* Create independent threads each of which will execute function
*/
iret1 = pthread_create( &thread1, NULL, print_message_function, (void*)
message1);
if(iret1)
{
fprintf(stderr,"Error - pthread_create() return code: %d\n",iret1);
exit(EXIT_FAILURE);
}
iret2 = pthread_create( &thread2, NULL, print_message_function, (void*)
message2);
if(iret2)
{
fprintf(stderr,"Error - pthread_create() return code: %d\n",iret2);
exit(EXIT_FAILURE);
}
printf("pthread_create() for thread 1 returns: %d\n",iret1);
printf("pthread_create() for thread 2 returns: %d\n",iret2);
/* Wait till threads are complete before main continues. Unless we */
/* wait we run the risk of executing an exit which will terminate */
/* the process and all threads before the threads have completed. */
pthread_join( thread1, NULL);
pthread_join( thread2, NULL);
exit(EXIT_SUCCESS);
}
void *print_message_function( void *ptr )
{
char *message;
message = (char *) ptr;
printf("%s \n", message);
}
Compiled to i386 and aarch64 object,
and both qemu-i386 and qemu-aarch64 had segmentation faults.
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