i ran ex1.c from the examples threads directory for glibc and got my
udb to break.
-a
the program:
/* Creates two threads, one printing 10000 "a"s, the other printing
10000 "b"s.
Illustrates: thread creation, thread joining. */
#include <stddef.h>
#include <stdio.h>
#include <unistd.h>
#include "pthread.h"
void * process(void * arg)
{
int i;
fprintf(stderr, "Starting process %s\n", (char *) arg);
for (i = 0; i < 10000; i++) {
write(1, (char *) arg, 1);
}
return NULL;
}
int main(void)
{
int retcode;
pthread_t th_a, th_b;
void * retval;
retcode = pthread_create(&th_a, NULL, process, (void *) "a");
if (retcode != 0) fprintf(stderr, "create a failed %d\n", retcode);
retcode = pthread_create(&th_b, NULL, process, (void *) "b");
if (retcode != 0) fprintf(stderr, "create b failed %d\n", retcode);
retcode = pthread_join(th_a, &retval);
if (retcode != 0) fprintf(stderr, "join a failed %d\n", retcode);
retcode = pthread_join(th_b, &retval);
if (retcode != 0) fprintf(stderr, "join b failed %d\n", retcode);
return 0;
}
here's the ksymoops:
ex1(564): Instruction fault 4
pc = [<fffffc0000462bb4>] ra = [<fffffc000041dd64>] ps = 0000
r0 = 0000000000000000 r1 = fffffc0002cc9b60 r2 = 0000000000000000
r3 = 0000000000000000 r4 = fffffc0002cc9b60 r5 = 0000000000000501
r6 = fffffc00026fa0a0 r7 = 0000000800000000 r8 = fffffc0001998000
r16= fffffc0002cc6fa0 r17= 0000000120000aa9 r18= 0000000000000001
r19= 0000000000000001 r20= 0000000000000001 r21= 000003fffffff4c0
r22= 0000000000000008 r23= 00000200002b44c0 r24= fffffc0002cc6fa0
r25= 0000000000000001 r27= fffffc0000462bb0 r28= fffffc0000420f78
gp = fffffc000047fd28 sp = fffffc000199bde8
Code: 00000000 00000000 00462b38 <fffffc00> 00000000 00000000
00000000 0000
>>EIP: fffffc0000462bb4 <fifo_inode_operations+4/a0>
Code: fffffc0000462ba8 <def_fifo_fops+70/78>
0000000000000000 <_EIP>:
Code: fffffc0000462bb0 <fifo_inode_operations+0/a0> 8: 00 46
2b 38 s
tb t0,17920(s2)
Code: fffffc0000462bb4 <fifo_inode_operations+4/a0> c: ff ff
fc 00 c
all_pal 0xfcffff
0000 00000000
Trace: [<fffffc0000420f78>] [<fffffc000033cd0c>] [<fffffc000033cd0c>]
[<fffffc00
003eb340>] [<fffffc0000310ba0>] [<fffffc0000310af8>]
Warning, Code line not seen, dumping what data is available
Trace: fffffc0000420f78 <sprintf+1f78/25a4>
Trace: fffffc000033cd0c <sys_write+14c/1c0>
Trace: fffffc000033cd0c <sys_write+14c/1c0>
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