Script started on Fri Aug 27 13:25:05 2010
GNU gdb (GDB) 7.2.50.20100827-cvs
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "armv7l-unknown-linux-gnueabi".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/ubuntu/src/pth/pth/.libs/test_std...done.
(gdb) b pth_mctx.c:361
No source file named pth_mctx.c.
Make breakpoint pending on future shared library load? (y or [n]) 
(gdb) b main
Breakpoint 1 at 0x8932: file test_std.c, line 83.
(gdb) r
Starting program: /home/ubuntu/src/pth/pth/.libs/test_std 

Breakpoint 1, main (argc=1, argv=0xbed8f844) at test_std.c:83
83	    fprintf(stderr, "\n=== TESTING GLOBAL LIBRARY API ===\n\n");
(gdb) b pth_mctx.c:361
Breakpoint 2 at 0x40022be4: file pth_mctx.c, line 361.
(gdb) c
Continuing.

=== TESTING GLOBAL LIBRARY API ===

Fetching library version
version = 0x200207

=== TESTING BASIC OPERATION ===

Initializing Pth system (spawns scheduler and main thread)
pth_lib.c: before pth_spawn

Program received signal SIGUSR1, User defined signal 1.
__libc_do_syscall ()
    at ../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S:41
41	../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S: No such file or directory.
	in ../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S
(gdb) c
Continuing.

Breakpoint 2, __pth_mctx_set (mctx=0x13130, 
    func=0x4002541d <pth_spawn_trampoline>, sk_addr_lo=<value optimized out>, 
    sk_addr_hi=0x23388 "") at pth_mctx.c:361
361	    if (pth_mctx_save((pth_mctx_t *)&mctx_caller) == 0)
(gdb) n
362	        longjmp(*((jmp_buf *)&mctx_trampoline), 1);
(gdb) p *(jmp_buf *)&mctx_caller
$1 = {{__jmpbuf = {1073956680, 78128, 0, 1073956680, 144264, -1093077412, 
      1073894429, -1093077424, -1093077968, 1073884153, 0 <repeats 54 times>}, 
    __mask_was_saved = 1, __saved_mask = {__val = {0 <repeats 32 times>}}}}
(gdb) x/12xw &mctx_caller
0x400347d0 <mctx_caller>:	0x40034748	0x00013130	0x00000000	0x40034748
0x400347e0 <mctx_caller+16>:	0x00023388	0xbed8f65c	0x4002541d	0xbed8f650
0x400347f0 <mctx_caller+32>:	0xbed8f430	0x40022bf9	0x00000000	0x00000000
(gdb) p/x $pc
$2 = 0x40022c12
(gdb) x/20i 0x40022bf4
   0x40022bf4 <__pth_mctx_set+328>:	blx	0x40021b54
   0x40022bf8 <__pth_mctx_set+332>:	
    cbz	r0, 0x40022c12 <__pth_mctx_set+358>
   0x40022bfa <__pth_mctx_set+334>:	movs	r3, #1
   0x40022bfc <__pth_mctx_set+336>:	b.n	0x40022b1a <__pth_mctx_set+110>
   0x40022bfe <__pth_mctx_set+338>:	blx	0x400221a8
   0x40022c02 <__pth_mctx_set+342>:	movs	r1, #5
   0x40022c04 <__pth_mctx_set+344>:	mov	r3, r4
   0x40022c06 <__pth_mctx_set+346>:	str	r1, [r0, #0]
   0x40022c08 <__pth_mctx_set+348>:	b.n	0x40022b1a <__pth_mctx_set+110>
   0x40022c0a <__pth_mctx_set+350>:	mov	r0, r11
   0x40022c0c <__pth_mctx_set+352>:	blx	0x40021d1c
   0x40022c10 <__pth_mctx_set+356>:	b.n	0x40022ba8 <__pth_mctx_set+252>
=> 0x40022c12 <__pth_mctx_set+358>:	
    ldr	r6, [pc, #24]	; (0x40022c2c <__pth_mctx_set+384>)
   0x40022c14 <__pth_mctx_set+360>:	movs	r1, #1
   0x40022c16 <__pth_mctx_set+362>:	ldr	r7, [sp, #4]
   0x40022c18 <__pth_mctx_set+364>:	adds	r5, r7, r6
   0x40022c1a <__pth_mctx_set+366>:	add.w	r0, r5, #664	; 0x298
   0x40022c1e <__pth_mctx_set+370>:	blx	0x40021bac
   0x40022c22 <__pth_mctx_set+374>:	nop
   0x40022c24 <__pth_mctx_set+376>:	andeq	r1, r1, r0, asr #10
(gdb) p/x $sp
$3 = 0xbed8f430
(gdb) # ok, the jmp_buf looks sane-ish
(gdb) i fr
Stack level 0, frame at 0xbed8f690:
 pc = 0x40022c12 in __pth_mctx_set (pth_mctx.c:362); saved pc 0x40025006
 called by frame at 0xbed8f6c0
 source language c.
 Arglist at 0xbed8f430, args: mctx=0x13130, 
    func=0x4002541d <pth_spawn_trampoline>, sk_addr_lo=<value optimized out>, 
    sk_addr_hi=0x23388 ""
 Locals at 0xbed8f430, Previous frame's sp is 0xbed8f690
 Saved registers:
  r4 at 0xbed8f66c, r5 at 0xbed8f670, r6 at 0xbed8f674, r7 at 0xbed8f678,
  r8 at 0xbed8f67c, r9 at 0xbed8f680, r10 at 0xbed8f684, r11 at 0xbed8f688,
  lr at 0xbed8f68c
(gdb) list 362
357	     * redundant ping-pong pointer arithmentic is neccessary to avoid
358	     * type-conversion warnings related to the `volatile' qualifier and
359	     * the fact that `jmp_buf' usually is an array type.
360	     */
361	    if (pth_mctx_save((pth_mctx_t *)&mctx_caller) == 0)
362	        longjmp(*((jmp_buf *)&mctx_trampoline), 1);
363	
364	    /*
365	     * Ok, we returned again, so now we're finished
366	     */
(gdb) x/12xw &mctx_trampoline
0x400349e0 <mctx_trampoline>:	0xbed8f550	0x00013130	0x00000000	0x000000b3
0x400349f0 <mctx_trampoline+16>:	0x00023388	0xbed8f65c	0x4002541d	0xbed8f650
0x40034a00 <mctx_trampoline+32>:	0x00023088	0x40022a8b	0x00000000	0x00000000
(gdb) b *0x40022a8a
Breakpoint 3 at 0x40022a8a: file pth_mctx.c, line 394.
(gdb) # sp value 0x00023088 might be garbage?
(gdb) c
Continuing.
*** longjmp causes uninitialized stack frame ***: /home/ubuntu/src/pth/pth/.libs/test_std terminated

Program received signal SIGABRT, Aborted.
__libc_do_syscall ()
    at ../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S:41
41	../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S: No such file or directory.
	in ../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S
(gdb) # hmm
(gdb) b pth_mctx_set_trampoline 
Breakpoint 4 at 0x40022a70: file pth_mctx.c, line 394.
(gdb) p pth_mctx_set_trampoline 
$4 = {void (int)} 0x40022a70 <pth_mctx_set_trampoline>
(gdb) k
Kill the program being debugged? (y or n) y
(gdb) r
Starting program: /home/ubuntu/src/pth/pth/.libs/test_std 
Warning:
Cannot insert breakpoint 3.
Error accessing memory address 0x40022a8a: Input/output error.

(gdb) disa 3
(gdb) c
Continuing.

Breakpoint 1, main (argc=1, argv=0xbed67844) at test_std.c:83
83	    fprintf(stderr, "\n=== TESTING GLOBAL LIBRARY API ===\n\n");
(gdb) ena 3
(gdb) c
Continuing.

=== TESTING GLOBAL LIBRARY API ===

Fetching library version
version = 0x200207

=== TESTING BASIC OPERATION ===

Initializing Pth system (spawns scheduler and main thread)
pth_lib.c: before pth_spawn

Program received signal SIGUSR1, User defined signal 1.
__libc_do_syscall ()
    at ../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S:41
41	../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S: No such file or directory.
	in ../ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S
(gdb) c
Continuing.

Breakpoint 4, pth_mctx_set_trampoline (sig=10) at pth_mctx.c:394
394	    if (setjmp(*((jmp_buf *)&mctx_trampoline)) == 0) {
(gdb) p/x $sp
$5 = 0x23098
(gdb) x/20i $pc-8
   0x40022a68 <pth_mctx_set_bootstrap+96>:	strdeq	r1, [r1], -r0
   0x40022a6c <pth_mctx_set_bootstrap+100>:	andeq	r0, r0, r8, asr #14
=> 0x40022a70 <pth_mctx_set_trampoline>:	
    ldr	r2, [pc, #48]	; (0x40022aa4 <pth_mctx_set_trampoline+52>)
   0x40022a72 <pth_mctx_set_trampoline+2>:	nop
   0x40022a74 <pth_mctx_set_trampoline+4>:	
    add	r0, pc, #0	; (adr r0, 0x40022a78 <pth_mctx_set_trampoline+8>)
   0x40022a76 <pth_mctx_set_trampoline+6>:	
    ldr	r1, [pc, #48]	; (0x40022aa8 <pth_mctx_set_trampoline+56>)
   0x40022a78 <pth_mctx_set_trampoline+8>:	adds	r3, r2, r0
   0x40022a7a <pth_mctx_set_trampoline+10>:	push	{lr}
   0x40022a7c <pth_mctx_set_trampoline+12>:	adds	r0, r3, r1
   0x40022a7e <pth_mctx_set_trampoline+14>:	sub	sp, #12
   0x40022a80 <pth_mctx_set_trampoline+16>:	add.w	r0, r0, #664	; 0x298
   0x40022a84 <pth_mctx_set_trampoline+20>:	str	r3, [sp, #4]
   0x40022a86 <pth_mctx_set_trampoline+22>:	blx	0x40021e24
   0x40022a8a <pth_mctx_set_trampoline+26>:	
    cbnz	r0, 0x40022a9c <pth_mctx_set_trampoline+44>
   0x40022a8c <pth_mctx_set_trampoline+28>:	
    ldr	r0, [pc, #24]	; (0x40022aa8 <pth_mctx_set_trampoline+56>)
   0x40022a8e <pth_mctx_set_trampoline+30>:	movs	r1, #1
   0x40022a90 <pth_mctx_set_trampoline+32>:	ldr	r2, [sp, #4]
   0x40022a92 <pth_mctx_set_trampoline+34>:	adds	r3, r2, r0
---Type <return> to continue, or q <return> to quit---x/20i $pc-6
   0x40022a94 <pth_mctx_set_trampoline+36>:	str.w	r1, [r3, #1056]	; 0x420
   0x40022a98 <pth_mctx_set_trampoline+40>:	add	sp, #12
(gdb) x/20i $pc
=> 0x40022a70 <pth_mctx_set_trampoline>:	
    ldr	r2, [pc, #48]	; (0x40022aa4 <pth_mctx_set_trampoline+52>)
   0x40022a72 <pth_mctx_set_trampoline+2>:	nop
   0x40022a74 <pth_mctx_set_trampoline+4>:	
    add	r0, pc, #0	; (adr r0, 0x40022a78 <pth_mctx_set_trampoline+8>)
   0x40022a76 <pth_mctx_set_trampoline+6>:	
    ldr	r1, [pc, #48]	; (0x40022aa8 <pth_mctx_set_trampoline+56>)
   0x40022a78 <pth_mctx_set_trampoline+8>:	adds	r3, r2, r0
   0x40022a7a <pth_mctx_set_trampoline+10>:	push	{lr}
   0x40022a7c <pth_mctx_set_trampoline+12>:	adds	r0, r3, r1
   0x40022a7e <pth_mctx_set_trampoline+14>:	sub	sp, #12
   0x40022a80 <pth_mctx_set_trampoline+16>:	add.w	r0, r0, #664	; 0x298
   0x40022a84 <pth_mctx_set_trampoline+20>:	str	r3, [sp, #4]
   0x40022a86 <pth_mctx_set_trampoline+22>:	blx	0x40021e24
   0x40022a8a <pth_mctx_set_trampoline+26>:	
    cbnz	r0, 0x40022a9c <pth_mctx_set_trampoline+44>
   0x40022a8c <pth_mctx_set_trampoline+28>:	
    ldr	r0, [pc, #24]	; (0x40022aa8 <pth_mctx_set_trampoline+56>)
   0x40022a8e <pth_mctx_set_trampoline+30>:	movs	r1, #1
   0x40022a90 <pth_mctx_set_trampoline+32>:	ldr	r2, [sp, #4]
   0x40022a92 <pth_mctx_set_trampoline+34>:	adds	r3, r2, r0
   0x40022a94 <pth_mctx_set_trampoline+36>:	str.w	r1, [r3, #1056]	; 0x420
   0x40022a98 <pth_mctx_set_trampoline+40>:	add	sp, #12
---Type <return> to continue, or q <return> to quit---q
Quit
(gdb) set pagination off
(gdb) p setjmp
$6 = {<text variable, no debug info>} 0x40086220 <setjmp>
(gdb) tb *0x40022a86
Temporary breakpoint 5 at 0x40022a86: file pth_mctx.c, line 394.
(gdb) c
Continuing.

Temporary breakpoint 5, 0x40022a86 in pth_mctx_set_trampoline (sig=<value optimized out>) at pth_mctx.c:394
394	    if (setjmp(*((jmp_buf *)&mctx_trampoline)) == 0) {
(gdb) p/x $sp
$7 = 0x23088
(gdb) q
A debugging session is active.

	Inferior 1 [process 30355] will be killed.

Quit anyway? (y or n) y

Script done on Fri Aug 27 13:41:00 2010