GDB command

[electrolot]

How use GDB command after start debugger? Is it possible? I can't find this option. GDB console is also not available.

[mariocup]

Hi electrolot,

a GDB console is not available in CB.
For setting debugger options select: Project->Properties and go to the tab Debugger. In this view select additional commands tab and insert your commands.

Bye,

Mario

[electrolot]

Hi Mario,

Thank you.
I set only one additional command After connection:

Code

target sim

and GDB always close after start:

Code

Debugger finished with status 1

.
When I use the same command in GDB console it works fine.

[mariocup]

Hi electrolot,

I think you must specify also the parameters for the e.g. remote protocol <IP>:<Port> like this

Code

target sim localhost:6785
b main

Bye,

Mario

[electrolot]

Hi Mario,

I tried with parameters of remote protocol.
Still the same 

I don't know why it does not work because in GDB console it works OK.

I try to make visible GDB console in C::B and I change DebuggerGDB::LaunchProcess function:

   

Code

m_Pid = wxExecute(cmd, wxEXEC_ASYNC, m_pProcess);

to
   

Code

m_Pid = wxExecute(cmd, wxEXEC_ASYNC | wxEXEC_NOHIDE, m_pProcess); 

now I see GDB console but without commands line.

[Jenna]

The commands are redirected.

To make visible what is sent and returned to and from gdb you have to check "Settings -> Compiler and debugger... -> Debugger settings -> Display debugger's log".

[electrolot]

Thank you jens.
My debug log:

Code

Working dir : C:\Program Files\CodeBlocks\projects\arm_emul\
> set prompt >>>>>>cb_gdb:
(gdb)
>>>>>>cb_gdb:>>>>>>cb_gdb:
> show version
GNU gdb (Sourcery G++ Lite 2008q1-126) 6.7.50.20080107-cvs
Copyright (C) 2008 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 "--host=i686-mingw32 --target=arm-none-eabi".
For bug reporting instructions, please see:
<https://support.codesourcery.com/GNUToolchain/>.
>>>>>>cb_gdb:GNU gdb (Sourcery G++ Lite 2008q1-126) 6.7.50.20080107-cvs
> set confirm off
C
opyright (C) 2008 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 "--host=i686-mingw32 --target=arm-none-eabi".
For bug reporting instructions, please see:
<https://support.codesourcery.com/GNUToolchain/>.
>>>>>>cb_gdb:>>>>>>cb_gdb:>>>>>>cb_gdb:
> set width 0
>>>>>>cb_gdb:>>>>>>cb_gdb:
> set height 0
>>>>>>cb_gdb:>>>>>>cb_gdb:
> set breakpoint pending on
>>>>>>cb_gdb:>>>>>>cb_gdb:
> set print asm-demangle on
>>>>>>cb_gdb:>>>>>>cb_gdb:
> set unwindonsignal on
>>>>>>cb_gdb:>>>>>>cb_gdb:
> set debugevents on
No symbol "debugevents" in current context.
>>>>>>cb_gdb:>>>>>>cb_gdb:
> set new-console on
No symbol "debugevents" in current context.
No symbol "new" in current context.
>>>>>>cb_gdb:>>>>>>cb_gdb:
> set disassembly-flavor att
No symbol "new" in current context.
No symbol "disassembly" in current context.
>>>>>>cb_gdb:>>>>>>cb_gdb:
> catch throw
No symbol "disassembly" in current context.
Function "__cxa_throw" not defined.
>>>>>>cb_gdb:>>>>>>cb_gdb:
> cd bin/Debug
Function "__cxa_throw" not defined.
>>>>>>cb_gdb:>>>>>>cb_gdb:
> directory C:/PROGRA~1/CODEBL~1/projects/arm_emul/
>>>>>>cb_gdb:>>>>>>cb_gdb:
> target sim
Connected to the simulator.
>>>>>>cb_gdb:
> break "C:/Program Files/CodeBlocks/projects/arm_emul/main.c:11"
No source file named C:/Program Files/CodeBlocks/projects/arm_emul/main.c.
Connected to the simulator.
>>>>>>cb_gdb:Breakpoint 1 ("C:/Program Files/CodeBlocks/projects/arm_emul/main.c:11) pending.
> run
No source file named C:/Program Files/CodeBlocks/projects/arm_emul/main.c.
>>>>>>cb_gdb:Breakpoint 2 ("C:/Program Files/CodeBlocks/projects/arm_emul/main.c:11) pending.
>>>>>>cb_gdb:
warning: No program loaded.

File C:/Program Files/CodeBlocks/projects/arm_emul/main.c exist.
Is it problem with Linux path ("/") ?

[mariocup]

Hi electrolot,

please try to put your files in a path without spaces and then tell me if the problem still occurs. I had some time ago similar problems, since gdb tries to change to the pwd and then load the symbols e.g. with the absolute path.

Bye,

Mario

[electrolot]

Hi Mario,

I put files in a path without spaces and my last problem does not exist. But I have few new problems with GDB output parsing by C::B. I've got very simple program:

Code

#include <stdio.h>
int i,j;
main (void)
{
  int k;
  printf("Hello World!\n");

  while (1)
    {
      for (i=0;i<100;i++)
        {
          j++;
          k+=2;
        }
    }

  return 0;
}

I can run my program in debugger, set breakpoint, stepping etc. My new problems:
1) Watch does not work propertly. I add to watch i,j variable, i value does not show, "j = type = int". Local variables is empty. Function arguments is k = 102.
Debug log after next line command:

Code

> next
Breakpoint 1, main () at main.c:12
c:/projects/arm_emul/main.c:12:145:beg:0x144
>>>>>>cb_gdb:c:/projects/arm_emul/main.c:13:161:beg:0x158
> info locals
>>>>>>cb_gdb:
> info args
k = 102
>>>>>>cb_gdb:k = 102
> whatis i
>>>>>>cb_gdb:No arguments.
> output i
>>>>>>cb_gdb:No arguments.
> whatis j
>>>>>>cb_gdb:
> output j
type = int
>>>>>>cb_gdb:type = int
>>>>>>cb_gdb:51>>>>>>cb_gdb:51>>>>>>cb_gdb:type = int
>>>>>>cb_gdb:type = int
>>>>>>cb_gdb:52>>>>>>cb_gdb:52>>>>>>cb_gdb:

2) disassembly does not work. I still see "Please wait while disassembling..."
Debug log:

Code

> info frame
Stack level 0, frame at 0x200000:
 pc = 0x134 in main (main.c:10); saved pc 0x2cb4
 source language c.
 Arglist at 0x1ffff0, args: 
 Locals at 0x1ffff0, Previous frame's sp is 0x200000
 Saved registers:
  r11 at 0x1ffff8, lr at 0x1ffffc, pc at 0x1ffffc
>>>>>>cb_gdb:Stack level 0, frame at 0x200000:
> disassemble
 pc = 0x134 in main (main.c:10); saved pc 0x2cb4
 source language c.
 Arglist at 0x1ffff0, args: 
 Locals at 0x1ffff0, Previous frame's sp is 0x200000
 Saved registers:
  r11 at 0x1ffff8, lr at 0x1ffffc, pc at 0x1ffffc
>>>>>>cb_gdb:
Dump of assembler code for function main:
0x00000120 <main+0>:	push	{r11, lr}
0x00000124 <main+4>:	add	r11, sp, #4	; 0x4
0x00000128 <main+8>:	sub	sp, sp, #8	; 0x8
0x0000012c <main+12>:	ldr	r0, [pc, #88]	; 0x18c <main+108>
0x00000130 <main+16>:	bl	0x260 <puts>
0x00000134 <main+20>:	ldr	r2, [pc, #84]	; 0x190 <main+112>
0x00000138 <main+24>:	mov	r3, #0	; 0x0
0x0000013c <main+28>:	str	r3, [r2]
0x00000140 <main+32>:	b	0x178 <main+88>
0x00000144 <main+36>:	ldr	r3, [pc, #72]	; 0x194 <main+116>
0x00000148 <main+40>:	ldr	r3, [r3]
0x0000014c <main+44>:	add	r2, r3, #1	; 0x1
0x00000150 <main+48>:	ldr	r3, [pc, #60]	; 0x194 <main+116>
0x00000154 <main+52>:	str	r2, [r3]
0x00000158 <main+56>:	ldr	r3, [r11, #-8]
0x0000015c <main+60>:	add	r3, r3, #2	; 0x2
0x00000160 <main+64>:	str	r3, [r11, #-8]
0x00000164 <main+68>:	ldr	r3, [pc, #36]	; 0x190 <main+112>
0x00000168 <main+72>:	ldr	r3, [r3]
0x0000016c <main+76>:	add	r2, r3, #1	; 0x1
0x00000170 <main+80>:	ldr	r3, [pc, #24]	; 0x190 <main+112>
0x00000174 <main+84>:	str	r2, [r3]
0x00000178 <main+88>:	ldr	r3, [pc, #16]	; 0x190 <main+112>
0x0000017c <main+92>:	ldr	r3, [r3]
0x00000180 <main+96>:	cmp	r3, #99	; 0x63
0x00000184 <main+100>:	ble	0x144 <main+36>
0x00000188 <main+104>:	b	0x134 <main+20>
0x0000018c <main+108>:	andeq	r3, r0, r4, lsl r2
0x00000190 <main+112>:	andeq	r3, r0, r12, asr #21
0x00000194 <main+116>:	ldrdeq	r3, [r0], -r0
End of assembler dump.
>>>>>>cb_gdb:Dump of assembler code for function main:
0x00000120 <main+0>:	push	{r11, lr}
0x00000124 <main+4>:	add	r11, sp, #4	; 0x4
0x00000128 <main+8>:	sub	sp, sp, #8	; 0x8
0x0000012c <main+12>:	ldr	r0, [pc, #88]	; 0x18c <main+108>
0x00000130 <main+16>:	bl	0x260 <puts>
0x00000134 <main+20>:	ldr	r2, [pc, #84]	; 0x190 <main+112>
0x00000138 <main+24>:	mov	r3, #0	; 0x0
0x0000013c <main+28>:	str	r3, [r2]
0x00000140 <main+32>:	b	0x178 <main+88>
0x00000144 <main+36>:	ldr	r3, [pc, #72]	; 0x194 <main+116>
0x00000148 <main+40>:	ldr	r3, [r3]
0x0000014c <main+44>:	add	r2, r3, #1	; 0x1
0x00000150 <main+48>:	ldr	r3, [pc, #60]	; 0x194 <main+116>
0x00000154 <main+52>:	str	r2, [r3]
0x00000158 <main+56>:	ldr	r3, [r11, #-8]
0x0000015c <main+60>:	add	r3, r3, #2	; 0x2
0x00000160 <main+64>:	str	r3, [r11, #-8]
0x00000164 <main+68>:	ldr	r3, [pc, #36]	; 0x190 <main+112>
0x00000168 <main+72>:	ldr	r3, [r3]
0x0000016c <main+76>:	add	r2, r3, #1	; 0x1
0x00000170 <main+80>:	ldr	r3, [pc, #24]	; 0x190 <main+112>
0x00000174 <main+84>:	str	r2, [r3]
0x00000178 <main+88>:	ldr	r3, [pc, #16]	; 0x190 <main+112>
0x0000017c <main+92>:	ldr	r3, [r3]
0x00000180 <main+96>:	cmp	r3, #99	; 0x63
0x00000184 <main+100>:	ble	0x144 <main+36>
0x00000188 <main+104>:	b	0x134 <main+20>
0x0000018c <main+108>:	andeq	r3, r0, r4, lsl r2
0x00000190 <main+112>:	andeq	r3, r0, r12, asr #21
0x00000194 <main+116>:	ldrdeq	r3, [r0], -r0
End of assembler dump.
>>>>>>cb_gdb:

3) CPU registers refresh only first time. Next Line commands does not refresh values of registers.

[mariocup]

Hi,

could you attach your C::B project file and then I will have a look at it.

Bye,

Mario

[electrolot]

Attached. Thanks in advance.




[attachment deleted by admin]

[mariocup]

Hi electrolot,

I have just tested your project. Since I have no ARM Compiler installed on my private laptop I changed the project for the GNU TriCore compiler. I did the following steps:
1. start the tricore simulator
2. Add in the debug settings in before command:
tar extended-remote localhost:6785
load arm_emul.elf
b main

If I start Debug->Start, then the program runs to main and if I step to next line everything works perfectly. See the debugger screenshot in the attached archive.

Sorry but I can't reproduce the problem.

Bye,

Mario

[attachment deleted by admin]

[electrolot]

Hi Mario,

thank you for your help.

I use gdb.exe file from another toolchain and all works fine.
I don't know why if I use CodeSourcery toolchain it does not work.
I've got one problem now. When I use Next Instruction command I see disassembly window but address cursor is still in source. I think that the cursor should be in disassembly window.

regards