* [parisc-linux] gdb debugging SIGEV_THREAD threads?
@ 2005-08-02 13:41 Carlos O'Donell
2005-08-02 14:44 ` [parisc-linux] " Randolph Chung
0 siblings, 1 reply; 3+ messages in thread
From: Carlos O'Donell @ 2005-08-02 13:41 UTC (permalink / raw)
To: parisc-linux; +Cc: Randolph Chung
Randolph,
Might you have a clue as to why gdb can't debug a SIGEV_THREAD?
This test fails with a SIGSEGV in NPTL. The thread is in
__deallocate_stack (DSO address check from fault)
The bug itself could be a problem with the CLONE_SETTLS flag
implementation.
-----
(gdb) break *0x400294dc
Breakpoint 2 at 0x400294dc: file list.h, line 71.
(gdb) r
The program being debugged has been started already.
Start it from the beginning? (y or n) y^H
Starting program:
/mnt/flaire/src/tls-toolchain-hppa/build/tests/tst-timer/tst-timer
Breakpoint 2 at 0x400294dc
Breakpoint 2 at 0x400294dc: file list.h, line 71.
Breakpoint 1, main () at tst-timer.c:82
82 setvbuf (stdout, 0, _IOLBF, 0);
(gdb) c
Continuing.
00000000 00000000 00000002 0002119a 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
00000000 00000000 00000002 0002119a 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00022098
00000000 00000000 00000002 0002119a 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00022098
notify_func1
Program terminated with signal SIGTRAP, Trace/breakpoint trap.
The program no longer exists.
(gdb)
-----
do_page_fault() pid=24956 command='tst-timer' type=15 address=0x00000005
YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
PSW: 00000000000001001111111100001111 Not tainted
r00-03 0000000000000000 0000000000000000 000000004004c154 0000000040049f64
r04-07 0000000040049f64 0000000000000000 00000000410bc500 00000000000000fb
r08-11 ffffffffdeadbeef 00000000007d0f00 00000000000220a8 00000000000000fb
r12-15 0000000000800000 00000000408bd000 0000000000000007 00000000deadbeef
r16-19 00000000000220a8 0000000040411dae 0000000000022098 0000000040049f64
r20-23 0000000000000000 0000000000000001 00000000410bc540 0000000000000000
r24-27 0000000000000001 0000000000000000 000000004004c154 0000000000021184
r28-31 0000000000000000 0000000000000001 00000000410bc340 000000004002949b
sr0-3 00000000008d7800 0000000000000000 0000000000000000 00000000008d7800
sr4-7 00000000008d7800 00000000008d7800 00000000008d7800 00000000008d7800
VZOUICununcqcqcqcqcqcrmunTDVZOUI
FPSR: 00000000000000000000000000000000
FPER1: 00000000
fr00-03 0000000000000000 0000000000000000 0000000000000000 0000000000000000
fr04-07 00000000101f3edc 00000000107575f8 0000000012603c18 0000000000000000
fr08-11 00000000106d3ae0 0000000000000002 00000000106d3ae0 0000000000000802
fr12-15 0000000010199cf8 0000000000000020 00000000101c7e84 00000000125ae000
fr16-19 00000000125ae000 0000000000000000 00000000106d3ae0 000f41fa2f9b5bc0
fr20-23 0000000000000020 00000000101c7e84 0000000000000088 00000040cccccccd
fr24-27 0000001b55555555 3fe0000000000000 412e848000000000 00000000106d3ae0
fr28-31 000000006f8ecdc8 000000000000000b 0000000000000020 0000000000000000
IASQ: 00000000008d7800 00000000008d7800 IAOQ: 00000000400294df 00000000400294e3
IIR: 0ebc1288 ISR: 00000000008d7800 IOR: 0000000000000005
CPU: 0 CR30: 000000003ec88000 CR31: 0000000010694000
ORIG_R28: 0000000000000000
IAOQ[0]: 0x400294df
IAOQ[1]: 0x400294e3
RP(r2): 0x4004c154
-----
00006434 <__deallocate_stack>:
6434: 6b c2 3f d9 stw rp,-14(,sp)
6438: 34 1c 00 1c ldi e,ret0
643c: 37 de 01 00 ldo 80(sp),sp
6440: 6b dc 3f 19 stw ret0,-74(,sp)
6444: 2a 60 00 00 addil 0,r19,%r1
6448: 23 8e cb d5 ldil -21524000,ret0
644c: 48 22 00 b0 ldw 58(,r1),rp
6450: 6b c6 3f 31 stw r6,-68(,sp)
6454: 37 9c 3d df ldo -111(ret0),ret0
6458: 08 1a 02 46 copy r26,r6
Save input struct pthread* to r6
645c: 6b c4 3f 41 stw r4,-60(,sp)
6460: 34 1d 00 02 ldi 1,ret1
6464: 34 04 00 00 ldi 0,r4
6468: 6b c3 3f 49 stw r3,-5c(,sp)
646c: 08 01 02 43 copy r1,r3
6470: 6b c8 3f 21 stw r8,-70(,sp)
6474: 6b c7 3f 29 stw r7,-6c(,sp)
6478: 6b c5 3f 39 stw r5,-64(,sp)
647c: 6b d3 3f c1 stw r19,-20(,sp)
6480: 6b dc 3f 11 stw ret0,-78(,sp)
Atomic CAS to acquire the stack_cache_lock
-----
6484: 08 02 02 5a copy rp,r26
6488: 08 04 02 59 copy r4,r25
648c: 08 1d 02 58 copy ret1,r24
6490: e4 00 81 60 be,l b0(sr2,r0),%sr0,%r31
6494: 34 14 00 00 ldi 0,r20
6498: 86 b6 20 02 cmpib,=,n b,r21,64a0 <__deallocate_stack+0x6c>
649c: 08 00 02 40 nop
64a0: 6b dc 3f 11 stw ret0,-78(,sp)
64a4: 0a a0 04 15 sub r0,r21,r21
64a8: 6b d5 3f 19 stw r21,-74(,sp)
-----
64ac: 4b c5 3f 19 ldw -74(,sp),r5
64b0: 84 bc 22 3a cmpib,=,n e,r5,65d4 <__deallocate_stack+0x1a0>
64b4: 4b d4 3f 19 ldw -74(,sp),r20
64b8: 34 1c 01 f6 ldi fb,ret0
64bc: 82 9c 22 22 cmpb,=,n ret0,r20,65d4 <__deallocate_stack+0x1a0>
64c0: 4b dc 3f 11 ldw -78(,sp),ret0
64c4: 8f 80 22 38 cmpib,<> 0,ret0,65e8 <__deallocate_stack+0x1b4>
64c8: 08 13 02 44 copy r19,r4
64cc: 34 d6 00 80 ldo 40(r6),r22
64d0: 0e c8 10 9c ldw 4(,r22),ret0
64d4: 48 d5 00 80 ldw 40(,r6),r21
Load parameter offset 40 from struct pthread*
64d8: 40 d4 03 c2 ldb 1e1(,r6),r20
64dc: 0e bc 12 88 stw ret0,4(,r21)
Store result into that address
..... *BOOM*
-----
/* Tests for POSIX timer implementation. */
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
void hexdump(int * data, size_t length);
static void
notify_func1 (union sigval sigval)
{
puts ("notify_func1");
}
static void
intr_sleep (int sec)
{
struct timespec ts;
ts.tv_sec = sec;
ts.tv_nsec = 0;
while (nanosleep (&ts, &ts) == -1 && errno == EINTR)
;
}
#define ZSIGALRM 14
void
hexdump(int * data, size_t length)
{
unsigned int i;
size_t wordlength = length / 4;
for (i=0; i < wordlength; i++)
{
if ((i % 8) == 0)
printf("\n");
printf("%08x ", data[i]);
}
printf("\n");
}
int
main (void)
{
timer_t timer_thr1;
struct sigevent sigev2;
struct itimerspec itimer2 = { { 0, 100000000 }, { 0, 500000000 } };
struct itimerspec old;
memset(&timer_thr1, '\0', sizeof(timer_thr1));
memset(&sigev2, '\0', sizeof(sigev2));
sigev2.sigev_notify = SIGEV_THREAD;
sigev2.sigev_notify_function = notify_func1;
sigev2.sigev_notify_attributes = NULL;
/* It is unnecessary to do the following but to set a good example
we do it anyhow. */
sigev2.sigev_value.sival_ptr = NULL;
setvbuf (stdout, 0, _IOLBF, 0);
hexdump((int *)&sigev2, sizeof(sigev2));
hexdump((int *)&timer_thr1, sizeof(timer_thr1));
if (timer_create (CLOCK_REALTIME, &sigev2, &timer_thr1) != 0)
{
printf ("timer_create for timer_thr1 failed: %m\n");
exit (1);
}
hexdump((int *)&sigev2, sizeof(sigev2));
hexdump((int *)&timer_thr1, sizeof(timer_thr1));
if (timer_settime (timer_thr1, 0, &itimer2, &old) != 0)
{
printf ("timer_settime for timer_thr1 failed: %m\n");
exit (1);
}
hexdump((int *)&sigev2, sizeof(sigev2));
hexdump((int *)&timer_thr1, sizeof(timer_thr1));
intr_sleep (6);
if (timer_delete (timer_thr1) != 0)
{
printf ("timer_delete for timer_thr1 failed: %m\n");
exit (1);
}
return 0;
}
-----
c.
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2005-08-02 13:41 [parisc-linux] gdb debugging SIGEV_THREAD threads? Carlos O'Donell
2005-08-02 14:44 ` [parisc-linux] " Randolph Chung
2005-08-02 15:25 ` Carlos O'Donell
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