mips-big-elf craches

mips-big-elf craches

[Johan Rydberg]

I get the following crash when I try to run against my own developed
simulator (http://www.nongnu.org/guss).  It seems that the "get_next_frame"
fn returns NULL for some reason.

Transcript:

(top-gdb) run
Starting program: /home/jrydberg/g2/src/b/gdb/./gdb 
GNU gdb 2003-02-13-cvs
Copyright 2003 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=mips-big-elf".
Setting up the environment for debugging gdb.
.gdbinit:5: Error in sourced command file:
No symbol table is loaded.  Use the "file" command.
(gdb) set debug remote 1          
(gdb) target remote localhost:1234
Remote debugging using localhost:1234
Sending packet: $Hc-1#09...Ack
Packet received: OK
Sending packet: $qC#b4...Ack
Packet received: 
Sending packet: $qOffsets#4b...Ack
Packet received: 
Sending packet: $?#3f...Ack
Packet received: S05
Sending packet: $Hg0#df...Ack
Packet received: OK
Sending packet: $g#67...Ack
Packet received: 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000800ffffc00000000000000000000000000000000000000000000000000000000bfc000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000b6d20040346b014028c313400100000000000000d8f6ffbf9db2234093e10c080060274000ca0d08aa920408c43414400000000088d01508f8f6ffbf28f7ffbf50d40040

Breakpoint 1, internal_error (file=0x81c7649 "../../gdb/frame.c", line=187, string=0x8190c62 "%s%sAssertion `%s' failed.") at ../../gdb/utils.c:800
800	  va_start (ap, string);
(top-gdb) bt
#0  internal_error (file=0x81c7649 "../../gdb/frame.c", line=187, string=0x8190c62 "%s%sAssertion `%s' failed.") at ../../gdb/utils.c:800
#1  0x080f9702 in frame_register_unwind (frame=0x0, regnum=29, optimizedp=0xbfffed8c, lvalp=0xbfffed90, addrp=0xbfffed94, realnump=0xbfffed98, bufferp=0xbfffed70) at ../../gdb/frame.c:187
#2  0x080c6cf4 in read_next_frame_reg (fi=0x0, regno=29) at ../../gdb/mips-tdep.c:1592
#3  0x080c7720 in heuristic_proc_desc (start_pc=0, limit_pc=3217031168, next_frame=0x0, cur_frame=1) at ../../gdb/mips-tdep.c:2140
#4  0x080c7e1a in find_proc_desc (pc=3217031168, next_frame=0x0, cur_frame=1) at ../../gdb/mips-tdep.c:2403
#5  0x080c7f94 in mips_init_extra_frame_info (fromleaf=0, fci=0x821f498) at ../../gdb/mips-tdep.c:2477
#6  0x080bcc80 in gdbarch_init_extra_frame_info (gdbarch=0x8221da8, fromleaf=0, frame=0x821f498) at ../../gdb/gdbarch.c:4436
#7  0x080facdf in get_prev_frame (next_frame=0x821f450) at ../../gdb/frame.c:1321
#8  0x080f9f2e in unwind_to_current_frame (ui_out=0x8221678, args=0x821f450) at ../../gdb/frame.c:496
#9  0x080f442e in catcher (func=0x80f9f20 <unwind_to_current_frame>, func_uiout=0x8221678, func_args=0x821f450, func_val=0xbfffefe0, func_caught=0xbfffefe4, errstring=0x0, mask=2) at ../../gdb/top.c:424
#10 0x080f44da in catch_exceptions (uiout=0x8221678, func=0x80f9f20 <unwind_to_current_frame>, func_args=0x821f450, errstring=0x0, mask=2) at ../../gdb/top.c:474
#11 0x080f9fc7 in get_current_frame () at ../../gdb/frame.c:518
#12 0x080ad8b8 in normal_stop () at ../../gdb/infrun.c:2986
...

Re: mips-big-elf craches

[Kevin Buettner]

On Mar 4,  4:00pm, Johan Rydberg wrote:

> I get the following crash when I try to run against my own developed
> simulator (http://www.nongnu.org/guss).  It seems that the "get_next_frame"
> fn returns NULL for some reason.
> 
[...]
> GNU gdb 2003-02-13-cvs

I think this problem has been fixed by the following change:

2003-02-20  Kevin Buettner  <kevinb@redhat.com>

	* frame.c (generic_unwind_get_saved_register): Make non-static.
	* frame.h (generic_unwind_get_saved_register): Declare.
	* mips-tdep.c (read_next_frame_reg): Fetch register from
	current regcache when frame is NULL.
	(mips_init_extra_frame_info): Pass NULL explicitly for parameter
	that must be NULL.
	(mips_get_saved_register): Call generic_unwind_get_saved_register()
	instead of frame_register_unwind().


Update your sources, rebuild, and try again...

Kevin