Re: [PATCH 4/5] ARM: read_pieced_value do big endian processing only in case of valid gdb_regnum

Victor Kamensky
2014-10-22T15:27:28Z

[-- Attachment #1: Type: text/plain, Size: 5863 bytes --]

Hi Yao,

I've attached my notes I captured while looking at
this issue. Some snippets from them repeated below
inline:

On 22 October 2014 02:27, Yao Qi <yao@codesourcery.com> wrote:
> Victor Kamensky <victor.kamensky@linaro.org> writes:
>
> Hi Victor,
> Could you please add more details in the commit message? for example....
>
>> During armv7b testing gdb.base/store.exp test was failling with
>> 'GDB internal error'. It turns out that compiler generated DWARF
>
> What is the 'GDB internal error'? Is it like this?
>
> (gdb) PASS: gdb.base/store.exp: continue to wack_double
> print l^M
> gdb/regcache.c:178: internal-error: register_size: Assertion `regnum >= 0 && regnum < (gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch))' failed.^M
> A problem internal to GDB has been detected,

Yes, it is like this. I'll added into commit message.

> We've seen this internal error on (armv5te big-endian) for a while.
>
>> with non-existent register numbers. The compiler issue is present
>> in both little endian (armv7) and big endian (armv7b) (it is
>> separate issue). In both case gdbarch_dwarf2_reg_to_regnum returns
>
> Is there any PR opened for the compiler issue? If there is, please
> mention it in the commit message, otherwise, please describe the
> mistakes in the compiler generated debug info, the snippet of
> 'readelf -wi' output, which shows the wrong register number, should be fine.

In both little endian and big endian cases compiler generate DW_OP_reg29-
DW_OP_reg31 something like this.

<2><792>: Abbrev Number: 10 (DW_TAG_formal_parameter)
<793> DW_AT_name : u
<795> DW_AT_decl_file : 1
<796> DW_AT_decl_line : 115
<797> DW_AT_type : <0x57c>
<79b> DW_AT_location : 6 byte block: 6d 93 4 6c 93 4
(DW_OP_reg29 (r29); DW_OP_piece: 4; DW_OP_reg28 (r28); DW_OP_piece: 4)

I strongly suspect that it is compiler error, but more accurately
it is hard to say, because I never saw a document where for given CPU
mapping from registers to DWARF reg numbers is defined. Have you
seen such document for example for ARM V7? In any case for this
test case Gdb believes that those register numbers are wrong. I.e we
can say for sure that gcc and gdb are disagrees.

>> -1 which is stored into gdb_regnum. But it cause severe problem
>> only in big endian case because in read_pieced_value and
>> write_pieced_value functions BFD_ENDIAN_BIG related processing
>> happen regardless of gdb_regnum value, and in case of gdb_regnum=-1,
>> it cause 'GDB internal error' and crash.
>>
>> Solution is to move BFD_ENDIAN_BIG related processing under
>> (gdb_regnum != -1) branch of processing.
>
> With your patch applied, the internal error is fixed. How does GDB
> behave now? What is the output for 'print l'? In my case, it becomes:
>
> print l^M
> Unable to access DWARF register number 80^M
> (gdb) FAIL: gdb.base/store.exp: upvar float l; print old l, expecting -1

Yes it becomes the same as little endian result for the same test case.

The only issue addressed by patch that it makes big endian case behave
consistently with little endian - i.e don't do register_size call for unknown
register number

>> ---
>> gdb/ChangeLog | 6 ++++++
>> gdb/dwarf2loc.c | 30 +++++++++++++++---------------
>> 2 files changed, 21 insertions(+), 15 deletions(-)
>>
>> diff --git a/gdb/ChangeLog b/gdb/ChangeLog
>> index c32fb3f..6a735b8 100644
>> --- a/gdb/ChangeLog
>> +++ b/gdb/ChangeLog
>> @@ -1,5 +1,11 @@
>> 2014-10-13 Victor Kamensky <victor.kamensky@linaro.org>
>>
>> + * dwarf2loc.c (read_pieced_value): do BE processing only if
>> + gdb_regnum is not -1.
>
> s/do/Do. Looks you've fixed it in V2.
> s/BE/big endian/ because BE isn't very clear here.
>
>> + (write_pieced_value): Ditto.
>> +
>> +2014-10-13 Victor Kamensky <victor.kamensky@linaro.org>
>> +
>> * arm-tdep.c: (extract_arm_insn): use dbarch_byte_order_for_code
>> to read arm instruction.
>>
>> diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c
>> index e347e59..fbe99bb 100644
>> --- a/gdb/dwarf2loc.c
>> +++ b/gdb/dwarf2loc.c
>> @@ -1686,20 +1686,20 @@ read_pieced_value (struct value *v)
>> int gdb_regnum = gdbarch_dwarf2_reg_to_regnum (arch, p->v.regno);
>> int reg_offset = source_offset;
>>
>> - if (gdbarch_byte_order (arch) == BFD_ENDIAN_BIG
>> - && this_size < register_size (arch, gdb_regnum))
>> - {
>> - /* Big-endian, and we want less than full size. */
>> - reg_offset = register_size (arch, gdb_regnum) - this_size;
>> - /* We want the lower-order THIS_SIZE_BITS of the bytes
>> - we extract from the register. */
>> - source_offset_bits += 8 * this_size - this_size_bits;
>> - }
>> -
>> if (gdb_regnum != -1)
>> {
>> int optim, unavail;
>>
>> + if (gdbarch_byte_order (arch) == BFD_ENDIAN_BIG
>> + && this_size < register_size (arch, gdb_regnum))
>> + {
>> + /* Big-endian, and we want less than full size. */
>> + reg_offset = register_size (arch, gdb_regnum) - this_size;
>> + /* We want the lower-order THIS_SIZE_BITS of the bytes
>> + we extract from the register. */
>> + source_offset_bits += 8 * this_size - this_size_bits;
>> + }
>> +
>
> Nit: after the change, local variable 'reg_offset' is only used in the
> "if (gdb_regnum != -1) {}" block, so we can move 'reg_offset' into that
> block.

Ok, I'll make this change too. I'll update comment note with details
and repost the patch.

Thanks,
Victor

> --
> Yao (齐尧)

[-- Attachment #2: gdb_armv7ab_badregnum.txt --]
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(gdb) file /wd1/gdb/20140930/build-v7le/gdb/testsuite/gdb.base/store
Reading symbols from /wd1/gdb/20140930/build-v7le/gdb/testsuite/gdb.base/store...done.
(gdb) tbreak wack_double
Temporary breakpoint 1 at 0x1076c: file ../../../binutils-gdb/gdb/testsuite/gdb.base/store.c, line 117.
(gdb) run
Starting program: /wd1/gdb/20140930/build-v7le/gdb/testsuite/gdb.base/store

Temporary breakpoint 1, wack_double (u=
../../binutils-gdb/gdb/regcache.c:177: internal-error: register_size: Assertion `regnum >= 0 && regnum < (gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch))' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.

BE Dump
=======

<1><779>: Abbrev Number: 12 (DW_TAG_subprogram)
<77a> DW_AT_external : 1
<77a> DW_AT_name : (indirect string, offset: 0x3c9): wack_double
<77e> DW_AT_decl_file : 1
<77f> DW_AT_decl_line : 115
<780> DW_AT_prototyped : 1
<780> DW_AT_type : <0x57c>
<784> DW_AT_low_pc : 0x10758
<788> DW_AT_high_pc : 0x40
<78c> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<78e> DW_AT_GNU_all_tail_call_sites: 1
<78e> DW_AT_sibling : <0x7d7>
<2><792>: Abbrev Number: 10 (DW_TAG_formal_parameter)
<793> DW_AT_name : u
<795> DW_AT_decl_file : 1
<796> DW_AT_decl_line : 115
<797> DW_AT_type : <0x57c>
<79b> DW_AT_location : 6 byte block: 6d 93 4 6c 93 4 (DW_OP_reg29 (r29); DW_OP_piece: 4; DW_OP_reg28 (r28); DW_OP_piece: 4)
<2><7a2>: Abbrev Number: 10 (DW_TAG_formal_parameter)
<7a3> DW_AT_name : v
<7a5> DW_AT_decl_file : 1
<7a6> DW_AT_decl_line : 115
<7a7> DW_AT_type : <0x57c>
<7ab> DW_AT_location : 6 byte block: 6f 93 4 6e 93 4 (DW_OP_reg31 (r31); DW_OP_piece: 4; DW_OP_reg30 (r30); DW_OP_piece: 4)
<2><7b2>: Abbrev Number: 13 (DW_TAG_variable)
<7b3> DW_AT_name : l
<7b5> DW_AT_decl_file : 1
<7b6> DW_AT_decl_line : 117
<7b7> DW_AT_type : <0x57c>
<7bb> DW_AT_location : 8 byte block: 90 21 93 4 90 20 93 4 (DW_OP_regx: 33 (r33); DW_OP_piece: 4; DW_OP_regx: 32 (r32); DW_OP_piece: 4)
<2><7c4>: Abbrev Number: 13 (DW_TAG_variable)
<7c5> DW_AT_name : r
<7c7> DW_AT_decl_file : 1
<7c8> DW_AT_decl_line : 117
<7c9> DW_AT_type : <0x57c>
<7cd> DW_AT_location : 8 byte block: 90 23 93 4 90 22 93 4 (DW_OP_regx: 35 (r35); DW_OP_piece: 4; DW_OP_regx: 34 (r34); DW_OP_piece: 4)

LE Dump
=======

<1><777>: Abbrev Number: 12 (DW_TAG_subprogram)
<778> DW_AT_external : 1
<778> DW_AT_name : (indirect string, offset: 0x3c9): wack_double
<77c> DW_AT_decl_file : 1
<77d> DW_AT_decl_line : 115
<77e> DW_AT_prototyped : 1
<77e> DW_AT_type : <0x57a>
<782> DW_AT_low_pc : 0x10758
<786> DW_AT_high_pc : 0x40
<78a> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<78c> DW_AT_GNU_all_tail_call_sites: 1
<78c> DW_AT_sibling : <0x7d5>
<2><790>: Abbrev Number: 10 (DW_TAG_formal_parameter)
<791> DW_AT_name : u
<793> DW_AT_decl_file : 1
<794> DW_AT_decl_line : 115
<795> DW_AT_type : <0x57a>
<799> DW_AT_location : 6 byte block: 6c 93 4 6d 93 4 (DW_OP_reg28 (r28); DW_OP_piece: 4; DW_OP_reg29 (r29); DW_OP_piece: 4)
<2><7a0>: Abbrev Number: 10 (DW_TAG_formal_parameter)
<7a1> DW_AT_name : v
<7a3> DW_AT_decl_file : 1
<7a4> DW_AT_decl_line : 115
<7a5> DW_AT_type : <0x57a>
<7a9> DW_AT_location : 6 byte block: 6e 93 4 6f 93 4 (DW_OP_reg30 (r30); DW_OP_piece: 4; DW_OP_reg31 (r31); DW_OP_piece: 4)
<2><7b0>: Abbrev Number: 13 (DW_TAG_variable)
<7b1> DW_AT_name : l
<7b3> DW_AT_decl_file : 1
<7b4> DW_AT_decl_line : 117
<7b5> DW_AT_type : <0x57a>
<7b9> DW_AT_location : 8 byte block: 90 20 93 4 90 21 93 4 (DW_OP_regx: 32 (r32); DW_OP_piece: 4; DW_OP_regx: 33 (r33); DW_OP_piece: 4)
<2><7c2>: Abbrev Number: 13 (DW_TAG_variable)
<7c3> DW_AT_name : r
<7c5> DW_AT_decl_file : 1
<7c6> DW_AT_decl_line : 117
<7c7> DW_AT_type : <0x57a>
<7cb> DW_AT_location : 8 byte block: 90 22 93 4 90 23 93 4 (DW_OP_regx: 34 (r34); DW_OP_piece: 4; DW_OP_regx: 35 (r35); DW_OP_piece: 4)

Backtrace when it failed to get reg number
==========================================

(gdb) n
4207 if (reg >= 256 && reg <= 287)
(gdb) n
4216 return -1;
(gdb) bt
#0 arm_dwarf_reg_to_regnum (gdbarch=0x24043a0, reg=29) at ../../binutils-gdb/gdb/arm-tdep.c:4216
#1 0x0020d430 in read_pieced_value (v=0x6c08) at ../../binutils-gdb/gdb/dwarf2loc.c:1686
#2 0x00144d7c in value_fetch_lazy (val=0x2635e08) at ../../binutils-gdb/gdb/value.c:3895
#3 0x001453b0 in value_entirely_covered_by_range_vector (value=0x2635e08, ranges=0x2635e5c)
at ../../binutils-gdb/gdb/value.c:392
#4 0x00156834 in value_check_printable (val=val@entry=0x2635e08, stream=stream@entry=0x24280c8, options=0xbee8e3ec)
at ../../binutils-gdb/gdb/valprint.c:810
#5 0x00156bbc in common_val_print (val=0x2635e08, stream=0x24280c8, stream@entry=0x4f505f72, recurse=recurse@entry=2,
options=0xbee8e3ec, options@entry=0xbee8e3e4, language=language@entry=0x3b979c <c_language_defn>)
at ../../binutils-gdb/gdb/valprint.c:849
#6 0x00189cbc in print_frame_arg (arg=0x2044575f) at ../../binutils-gdb/gdb/stack.c:286
#7 0x0018aa04 in print_frame_args (func=<optimized out>, frame=0x0, frame@entry=0x22f74a8, num=36664488, num@entry=-1,
stream=0xffffffff) at ../../binutils-gdb/gdb/stack.c:674
#8 0x0018b3f0 in print_frame (frame=frame@entry=0x22f74a8, print_level=print_level@entry=4331400,
print_what=print_what@entry=SRC_AND_LOC, print_args=print_args@entry=1, sal=...) at ../../binutils-gdb/gdb/stack.c:1205
#9 0x0018b8bc in print_frame_info (frame=0x22f74a8, frame@entry=0x1, print_level=print_level@entry=4331400,
print_what=SRC_AND_LOC, print_what@entry=36664488, print_args=print_args@entry=1, set_current_sal=set_current_sal@entry=1)
at ../../binutils-gdb/gdb/stack.c:857
#10 0x0018baac in print_stack_frame (frame=0x1, print_level=4331400, print_level@entry=0, print_what=36664488,
print_what@entry=SRC_AND_LOC, set_current_sal=0, set_current_sal@entry=1) at ../../binutils-gdb/gdb/stack.c:166
#11 0x0017ffe8 in print_stop_event (ws=ws@entry=0xbee8e6b8) at ../../binutils-gdb/gdb/infrun.c:6280
#12 0x001804c8 in normal_stop () at ../../binutils-gdb/gdb/infrun.c:6426
#13 0x00186304 in fetch_inferior_event (client_data=client_data@entry=0x0) at ../../binutils-gdb/gdb/infrun.c:3149
#14 0x0019bc08 in inferior_event_handler (event_type=INF_REG_EVENT, client_data=0x0) at ../../binutils-gdb/gdb/inf-loop.c:58
#15 0x00199dfc in process_event () at ../../binutils-gdb/gdb/event-loop.c:340
#16 0x0019a204 in gdb_do_one_event () at ../../binutils-gdb/gdb/event-loop.c:392
#17 0x0019a400 in start_event_loop () at ../../binutils-gdb/gdb/event-loop.c:429
#18 0x00193ed4 in captured_command_loop (data=<optimized out>) at ../../binutils-gdb/gdb/main.c:323
#19 0x00190ea4 in catch_errors (func=0x22b01d8, func@entry=0x193ebc <captured_command_loop>,
func_args=0x417fe8 <cleanup_chain>, func_args@entry=0x0, errstring=0x0, errstring@entry=0x387fc8 "", mask=37532008,
mask@entry=RETURN_MASK_ALL) at ../../binutils-gdb/gdb/exceptions.c:237
#20 0x00195168 in captured_main (data=<optimized out>) at ../../binutils-gdb/gdb/main.c:1151
#21 0x00190ea4 in catch_errors (func=0xb6f02800, func@entry=0x194404 <captured_main>, func_args=0x0,
func_args@entry=0xbee8e914, errstring=0xbee8e91c "", errstring@entry=0x387fc8 "", mask=4299140, mask@entry=RETURN_MASK_ALL)
at ../../binutils-gdb/gdb/exceptions.c:237
#22 0x00195658 in gdb_main (args=args@entry=0xbee8e914) at ../../binutils-gdb/gdb/main.c:1159
#23 0x0005f220 in main (argc=<optimized out>, argv=<optimized out>) at ../../binutils-gdb/gdb/gdb.c:32

Latter it hits assert in register_size

#0 0xb6a9d354 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0xb6aa0eb4 in __GI_abort () at abort.c:89
#2 0x0025b480 in dump_core () at ../../binutils-gdb/gdb/utils.c:578
#3 0x0025d448 in internal_vproblem (problem=0xb6bac0ac <lock>, problem@entry=0x419a78 <internal_error_problem>,
file=file@entry=0x37358c "../../binutils-gdb/gdb/regcache.c", line=line@entry=177, fmt=fmt@entry=0x0, ap=...)
at ../../binutils-gdb/gdb/utils.c:786
#4 0x0025d518 in internal_verror (file=file@entry=0x37358c "../../binutils-gdb/gdb/regcache.c", line=line@entry=177,
fmt=fmt@entry=0x0, ap=..., ap@entry=...) at ../../binutils-gdb/gdb/utils.c:812
#5 0x0028f150 in internal_error (file=file@entry=0x37358c "../../binutils-gdb/gdb/regcache.c", line=line@entry=177,
fmt=0x331904 "%s: Assertion `%s' failed.") at ../../binutils-gdb/gdb/common/errors.c:55
#6 0x00137558 in register_size (gdbarch=gdbarch@entry=0x24043a0, regnum=-1, regnum@entry=37804872)
at ../../binutils-gdb/gdb/regcache.c:175
#7 0x0020d590 in read_pieced_value (v=0x6c08) at ../../binutils-gdb/gdb/dwarf2loc.c:1690
#8 0x00144d7c in value_fetch_lazy (val=0x2635e08) at ../../binutils-gdb/gdb/value.c:3895
#9 0x001453b0 in value_entirely_covered_by_range_vector (value=0x2635e08, ranges=0x2635e5c)
at ../../binutils-gdb/gdb/value.c:392
#10 0x00156834 in value_check_printable (val=val@entry=0x2635e08, stream=stream@entry=0x24280c8, options=0xbee8e3ec)
at ../../binutils-gdb/gdb/valprint.c:810
#11 0x00156bbc in common_val_print (val=0x2635e08, stream=0x24280c8, stream@entry=0x4f505f72, recurse=recurse@entry=2,
options=0xbee8e3ec, options@entry=0xbee8e3e4, language=language@entry=0x3b979c <c_language_defn>)
at ../../binutils-gdb/gdb/valprint.c:849
#12 0x00189cbc in print_frame_arg (arg=0x2044575f) at ../../binutils-gdb/gdb/stack.c:286
#13 0x0018aa04 in print_frame_args (func=<optimized out>, frame=0x0, frame@entry=0x22f74a8, num=36664488, num@entry=-1,
stream=0xffffffff) at ../../binutils-gdb/gdb/stack.c:674
#14 0x0018b3f0 in print_frame (frame=frame@entry=0x22f74a8, print_level=print_level@entry=4331400,
print_what=print_what@entry=SRC_AND_LOC, print_args=print_args@entry=1, sal=...) at ../../binutils-gdb/gdb/stack.c:1205
#15 0x0018b8bc in print_frame_info (frame=0x22f74a8, frame@entry=0x1, print_level=print_level@entry=4331400,
print_what=SRC_AND_LOC, print_what@entry=36664488, print_args=print_args@entry=1, set_current_sal=set_current_sal@entry=1)
at ../../binutils-gdb/gdb/stack.c:857
#16 0x0018baac in print_stack_frame (frame=0x1, print_level=4331400, print_level@entry=0, print_what=36664488,
print_what@entry=SRC_AND_LOC, set_current_sal=0, set_current_sal@entry=1) at ../../binutils-gdb/gdb/stack.c:166
#17 0x0017ffe8 in print_stop_event (ws=ws@entry=0xbee8e6b8) at ../../binutils-gdb/gdb/infrun.c:6280
#18 0x001804c8 in normal_stop () at ../../binutils-gdb/gdb/infrun.c:6426
#19 0x00186304 in fetch_inferior_event (client_data=client_data@entry=0x0) at ../../binutils-gdb/gdb/infrun.c:3149
#20 0x0019bc08 in inferior_event_handler (event_type=INF_REG_EVENT, client_data=0x0) at ../../binutils-gdb/gdb/inf-loop.c:58
#21 0x00199dfc in process_event () at ../../binutils-gdb/gdb/event-loop.c:340
#22 0x0019a204 in gdb_do_one_event () at ../../binutils-gdb/gdb/event-loop.c:392
#23 0x0019a400 in start_event_loop () at ../../binutils-gdb/gdb/event-loop.c:429
#24 0x00193ed4 in captured_command_loop (data=<optimized out>) at ../../binutils-gdb/gdb/main.c:323
#25 0x00190ea4 in catch_errors (func=0x22b01d8, func@entry=0x193ebc <captured_command_loop>,
func_args=0x417fe8 <cleanup_chain>, func_args@entry=0x0, errstring=0x0, errstring@entry=0x387fc8 "", mask=37532008,
mask@entry=RETURN_MASK_ALL) at ../../binutils-gdb/gdb/exceptions.c:237
#26 0x00195168 in captured_main (data=<optimized out>) at ../../binutils-gdb/gdb/main.c:1151
#27 0x00190ea4 in catch_errors (func=0xb6f02800, func@entry=0x194404 <captured_main>, func_args=0x0,
func_args@entry=0xbee8e914, errstring=0xbee8e91c "", errstring@entry=0x387fc8 "", mask=4299140, mask@entry=RETURN_MASK_ALL)
at ../../binutils-gdb/gdb/exceptions.c:237

LE code receives gdb_regnum = -1 as well but LE code does not hit
this because it does not have the following snippet in read_pieced_value

if (gdbarch_byte_order (arch) == BFD_ENDIAN_BIG
&& this_size < register_size (arch, gdb_regnum))
{
/* Big-endian, and we want less than full size. */
reg_offset = register_size (arch, gdb_regnum) - this_size;
/* We want the lower-order THIS_SIZE_BITS of the bytes
we extract from the register. */
source_offset_bits += 8 * this_size - this_size_bits;
}

and it proceeds with error:

(gdb) n
1699 if (gdb_regnum != -1)
(gdb) n
1718 error (_("Unable to access DWARF register number %s"),
(gdb) bt
#0 read_pieced_value (v=0xb6c967c0 <main_arena>) at ../../binutils-gdb/gdb/dwarf2loc.c:1718
#1 0x00144a50 in value_fetch_lazy (val=0x2625020) at ../../binutils-gdb/gdb/value.c:3895
#2 0x00145084 in value_entirely_covered_by_range_vector (value=0x2625020, ranges=0x2625074) at ../../binutils-gdb/gdb/value.c:392
#3 0x00156580 in value_check_printable (val=val@entry=0x2625020, stream=stream@entry=0x2439da8, options=0xbebb85cc) at ../../binutils-gdb/gdb/valprint.c:810
#4 0x00156908 in common_val_print (val=0x2625020, stream=0x2439da8, stream@entry=0x725f504f, recurse=recurse@entry=2, options=0xbebb85cc, options@entry=0xbebb85c4,
language=language@entry=0x3b8f60 <c_language_defn>) at ../../binutils-gdb/gdb/valprint.c:849
#5 0x001899c8 in print_frame_arg (arg=0x5f574420) at ../../binutils-gdb/gdb/stack.c:286
#6 0x0018a710 in print_frame_args (func=<optimized out>, frame=0x0, frame@entry=0x2260438, num=36045880, num@entry=-1, stream=0xffffffff) at ../../binutils-gdb/gdb/stack.c:674
#7 0x0018b0fc in print_frame (frame=frame@entry=0x2260438, print_level=print_level@entry=4331144, print_what=print_what@entry=SRC_AND_LOC, print_args=print_args@entry=1, sal=...)
at ../../binutils-gdb/gdb/stack.c:1205
#8 0x0018b5c8 in print_frame_info (frame=0x2260438, frame@entry=0x1, print_level=print_level@entry=4331144, print_what=SRC_AND_LOC, print_what@entry=36045880, print_args=print_args@entry=1,
set_current_sal=set_current_sal@entry=1) at ../../binutils-gdb/gdb/stack.c:857
#9 0x0018b7b8 in print_stack_frame (frame=0x1, print_level=4331144, print_level@entry=0, print_what=36045880, print_what@entry=SRC_AND_LOC, set_current_sal=0, set_current_sal@entry=1)
at ../../binutils-gdb/gdb/stack.c:166
#10 0x0017fd00 in print_stop_event (ws=ws@entry=0xbebb8898) at ../../binutils-gdb/gdb/infrun.c:6280
#11 0x001801e0 in normal_stop () at ../../binutils-gdb/gdb/infrun.c:6426
#12 0x00186010 in fetch_inferior_event (client_data=client_data@entry=0x0) at ../../binutils-gdb/gdb/infrun.c:3149
#13 0x0019b8fc in inferior_event_handler (event_type=INF_REG_EVENT, client_data=0x0) at ../../binutils-gdb/gdb/inf-loop.c:58
#14 0x00199af0 in process_event () at ../../binutils-gdb/gdb/event-loop.c:340
#15 0x00199ef8 in gdb_do_one_event () at ../../binutils-gdb/gdb/event-loop.c:392
#16 0x0019a0f4 in start_event_loop () at ../../binutils-gdb/gdb/event-loop.c:429
#17 0x00193bcc in captured_command_loop (data=<optimized out>) at ../../binutils-gdb/gdb/main.c:323
#18 0x00190bac in catch_errors (func=0x22191d8, func@entry=0x193bb4 <captured_command_loop>, func_args=0x417ee8 <cleanup_chain>, func_args@entry=0x0, errstring=0x0,
errstring@entry=0x3877e0 "", mask=37746520, mask@entry=RETURN_MASK_ALL) at ../../binutils-gdb/gdb/exceptions.c:237
#19 0x00194e60 in captured_main (data=<optimized out>) at ../../binutils-gdb/gdb/main.c:1151
#20 0x00190bac in catch_errors (func=0xb6fec2a0, func@entry=0x1940fc <captured_main>, func_args=0x0, func_args@entry=0xbebb8af4, errstring=0xbebb8afc "\005", errstring@entry=0x3877e0 "",
mask=4298884, mask@entry=RETURN_MASK_ALL) at ../../binutils-gdb/gdb/exceptions.c:237
#21 0x00195350 in gdb_main (args=args@entry=0xbebb8af4) at ../../binutils-gdb/gdb/main.c:1159
#22 0x0005f218 in main (argc=<optimized out>, argv=<optimized out>) at ../../binutils-gdb/gdb/gdb.c:32