Re: Stak dump with tar.[bz2/gz] files (Cygwin)

[Angelo Graziosi <angelo.graziosi@alice.it>]

Eli Zaretskii ha scritto:

> Inside GDB, type "info symbol 0xNNNNNNNN" for each of the above lines,
> where NNNNNNNN is the number in the "Function" column.  This should
> display the name of each function in the stack dump.  

Some results:

[...]
       3 [sig] emacs 3908 open_stackdumpfile: Dumping stack trace to 
emacs.exe.stackdump

Program exited with code 0103000.
(gdb) info symbol 0x7C802542
WaitForSingleObject + 18 in section .text
(gdb) info symbol 0x61097F34
sig_send(_pinfo*, siginfo_t&, _cygtls*) + 2788 in section .text
(gdb) info symbol 0x61095ACB
_pinfo::kill(siginfo_t&) + 235 in section .text
(gdb) info symbol 0x61095FAB
kill0(int, siginfo_t&) + 107 in section .text
(gdb) info symbol 0x61096162
kill + 66 in section .text
(gdb) info symbol 0x61093588
_sigbe in section .text
(gdb) info symbol 0x61017BE0
_cygtls::call_signal_handler() + 144 in section .text
(gdb) info symbol 0x61098028
sig_send(_pinfo*, siginfo_t&, _cygtls*) + 3032 in section .text
(gdb) info symbol 0x61095ACB
_pinfo::kill(siginfo_t&) + 235 in section .text
(gdb) info symbol 0x61095FAB
kill0(int, siginfo_t&) + 107 in section .text
(gdb) info symbol 0x61096162
kill + 66 in section .text
(gdb) info symbol 0x61093588
_sigbe in section .text
(gdb) info symbol 0x0056A345
r_re_alloc + 149 in section .text
(gdb) info symbol 0x004C7C6F
enlarge_buffer_text + 47 in section .text
(gdb) info symbol 0x004D188C
make_gap_larger + 60 in section .text
(gdb) info symbol 0x004D2850
insert_from_string_1 + 544 in section .text


> Also, you can
> type "list *0xNNNNNNNN" (note the asterisk: it's important), which
> will show the source around the addresses in the stack dump.  That, at
> least, will glean some useful information from this gobbledygook.

idem:

(gdb) list *0x7C802542
No source file for address 0x7c802542.
(gdb) list *0x61097F34
No source file for address 0x61097f34.
(gdb) list *0x61095ACB
No source file for address 0x61095acb.
(gdb) list *0x61095FAB
No source file for address 0x61095fab.
(gdb) list *0x61096162
No source file for address 0x61096162.
(gdb) list *0x61093588
No source file for address 0x61093588.
(gdb) list *0x61017BE0
No source file for address 0x61017be0.
(gdb) list *0x61098028
No source file for address 0x61098028.
(gdb) list *0x61095ACB
No source file for address 0x61095acb.
(gdb) list *0x61095FAB
No source file for address 0x61095fab.
(gdb) list *0x61096162
No source file for address 0x61096162.
(gdb) list *0x61093588
No source file for address 0x61093588.
(gdb) list *0x0056A345
0x56a345 is in r_re_alloc (/work/emacs-23.0.60/src/ralloc.c:1016).
1011         SIZE size;
1012    {
1013      register bloc_ptr bloc;
1014
1015      if (! r_alloc_initialized)
1016        r_alloc_init ();
1017
1018      if (!*ptr)
1019        return r_alloc (ptr, size);
1020      if (!size)
(gdb) list *0x004C7C6F
0x4c7c6f is in enlarge_buffer_text (/work/emacs-23.0.60/src/buffer.c:5056).
5051      p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes);
5052    #else
5053      p = xrealloc (b->text->beg, nbytes);
5054    #endif
5055
5056      if (p == NULL)
5057        {
5058          UNBLOCK_INPUT;
5059          memory_full ();
5060        }
(gdb) list *0x004D188C
0x4d188c is in make_gap_larger (/work/emacs-23.0.60/src/insdel.c:529).
524         error ("Buffer exceeds maximum size");
525
526       enlarge_buffer_text (current_buffer, nbytes_added);
527
528       /* Prevent quitting in move_gap.  */
529       tem = Vinhibit_quit;
530       Vinhibit_quit = Qt;
531
532       real_gap_loc = GPT;
533       real_gap_loc_byte = GPT_BYTE;
(gdb) list *0x004D2850
0x4d2850 is in insert_from_string_1 (/work/emacs-23.0.60/src/insdel.c:1107).
1102      prepare_to_modify_buffer (PT, PT, NULL);
1103
1104      if (PT != GPT)
1105        move_gap_both (PT, PT_BYTE);
1106      if (GAP_SIZE < outgoing_nbytes)
1107        make_gap (outgoing_nbytes - GAP_SIZE);
1108      UNGCPRO;
1109
1110      /* Copy the string text into the buffer, perhaps converting
1111         between single-byte and multibyte.  */

If the above infos are useful, we are very fortunate...

Cheers,
    Angelo.