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User forums => Using Code::Blocks => Topic started by: Dark Fire on March 20, 2013, 03:03:55 am

Title: Code::Blocks 12.11 GDB Segfault On Breakpoint
Post by: Dark Fire on March 20, 2013, 03:03:55 am

Okay, I've been battling this problem for a few days. I installed Code::Blocks 12.11 and discovered it segfaulted on breakpoint when debugging. A rudimentary google search linked me here to a thread that indicated the problem was due to GCC optimizing out strings and whatever. Can't find any arguments to pass to GCC to cease this behaviour, so I went with the thread and set out to install Pretty Printers using the guide on the C::B wiki (http://wiki.codeblocks.org/index.php?title=Pretty_Printers).

After extracting MinGW-Builds over the CodeBlocks MinGW, it started complaining about the target not being compatible with x86-64 or whatever, so I set it to build with the i686 target. It then compiled, and it ran with the debugger! Yay! But then when I put in breakpoints, the debugger seems to effectively crash on the breakpoint. It comes with this output:

Quote

[debug]Command-line: C:\MINGW\bin\gdb.exe -nx -fullname  -quiet  -args C:/Users/Hayley/Documents/CodeBlocks/StringTest/bin/Debug/StringTest.exe
[debug]Working dir : C:\Users\Hayley\Documents\CodeBlocks\StringTest

Starting debugger: C:\MINGW\bin\gdb.exe -nx -fullname  -quiet  -args C:/Users/Hayley/Documents/CodeBlocks/StringTest/bin/Debug/StringTest.exe
done

[debug]> set prompt >>>>>>cb_gdb:
[debug]Skip initializing the scripting!

Setting breakpoints

[debug]Reading symbols from C:\Users\Hayley\Documents\CodeBlocks\StringTest\bin\Debug\StringTest.exe...done.
[debug](gdb) >>>>>>cb_gdb:
[debug]> show version
[debug]GNU gdb (GDB) 7.5.1
[debug]Copyright (C) 2012 Free Software Foundation, Inc.
[debug]License GPLv3+: GNU GPL version 3 or later
[debug]This is free software: you are free to change and redistribute it.
[debug]There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
[debug]and "show warranty" for details.
[debug]This GDB was configured as "x86_64-w64-mingw32".
[debug]For bug reporting instructions, please see:
[debug].
[debug]>>>>>>cb_gdb:
[debug]> set confirm off

Debugger name and version: GNU gdb (GDB) 7.5.1

[debug]>>>>>>cb_gdb:
[debug]> set width 0
[debug]>>>>>>cb_gdb:
[debug]> set height 0
[debug]>>>>>>cb_gdb:
[debug]> set breakpoint pending on
[debug]>>>>>>cb_gdb:
[debug]> set print asm-demangle on
[debug]>>>>>>cb_gdb:
[debug]> set unwindonsignal on
[debug]>>>>>>cb_gdb:
[debug]> set print elements 0
[debug]>>>>>>cb_gdb:
[debug]> set new-console on
[debug]>>>>>>cb_gdb:
[debug]> set disassembly-flavor att
[debug]>>>>>>cb_gdb:
[debug]> directory C:/Users/Hayley/Documents/CodeBlocks/StringTest/
[debug]Source directories searched: C:/Users/Hayley/Documents/CodeBlocks/StringTest;$cdir;$cwd
[debug]>>>>>>cb_gdb:
[debug]> break "C:/Users/Hayley/Documents/CodeBlocks/StringTest/main.cpp:20"
[debug]Breakpoint 1 at 0x40139b: file C:\Users\Hayley\Documents\CodeBlocks\StringTest\main.cpp, line 20.
[debug]>>>>>>cb_gdb:
[debug]> run
[debug]Starting program: C:\Users\Hayley\Documents\CodeBlocks\StringTest\bin\Debug\StringTest.exe

Child process PID: 10720

[debug][New Thread 10720.0x2818]
[debug]Do you need "set solib-search-path" or "set sysroot"?
[debug]Do you need "set solib-search-path" or "set sysroot"?
[debug]Do you need "set solib-search-path" or "set sysroot"?
[debug]Do you need "set solib-search-path" or "set sysroot"?
[debug]Program received signal ?, Unknown signal.
[debug]0x0008de08 in ?? ()
[debug]>>>>>>cb_gdb:

What's going on?

Title: Re: Code::Blocks 12.11 GDB Segfault On Breakpoint
Post by: ollydbg on March 20, 2013, 03:42:51 am

Code

This GDB was configured as "x86_64-w64-mingw32".

It looks like you are using a 64bit version of GDB, right?
What's your compiler log?
Did you build a 64bit exe?

Title: Re: Code::Blocks 12.11 GDB Segfault On Breakpoint
Post by: Dark Fire on March 20, 2013, 03:59:18 am

Yeah, I presume MinGW-Builds is 64-bit, so it would make sense that the GDB is also 64-bit.

Compiler log:

Quote

mingw32-g++.exe -Wall -fexceptions  -g    -I"C:\Program Files (x86)\CodeBlocks\DevPaks\include" -IC:\MinGW\include  -c C:\Users\Hayley\Documents\CodeBlocks\StringTest\main.cpp -o obj\Debug\main.o
mingw32-g++.exe -LC:\MinGW\lib\boost -LC:\MinGW\lib\sdl  -o bin\Debug\StringTest.exe obj\Debug\main.o   
Output size is 956.11 KB
Process terminated with status 0 (0 minutes, 1 seconds)
0 errors, 0 warnings (0 minutes, 1 seconds)

Presume that's 32-bit. Sending "show archi" to GDB returns (Currently i386), though, so is that really an issue?

Title: Re: Code::Blocks 12.11 GDB Segfault On Breakpoint
Post by: ollydbg on March 20, 2013, 04:29:58 am

Quote from: Dark Fire on March 20, 2013, 03:59:18 am

Yeah, I presume MinGW-Builds is 64-bit, so it would make sense that the GDB is also 64-bit.

MinGW-Builds sites supply both 32bit and 64bit compiler suites.

Quote

Presume that's 32-bit. Sending "show archi" to GDB returns (Currently i386), though, so is that really an issue?

I'm not sure whether a 64bit GDB can debug a 32bit app, I suggest you run the same steps in the Command line. If it also crash there, then you can report the bug to GDB or MinGW-Builds, as it is not related to C::B.

Title: Re: Code::Blocks 12.11 GDB Segfault On Breakpoint
Post by: Grad on March 20, 2013, 07:23:06 am

Perhaps,

http://comments.gmane.org/gmane.comp.gdb.bugs.discuss/11946