Debug problem with header files

[nenin]

I really need a reproducible test case to work with here, folks.

I know, and it is frustrating that I can't come up with a test case as I did for the previous problem. I am currently working on a fairly large program; and every now and then, when I set a break in a header file, the debugger fails. <***>

I confirm the same problem. I have a project with headers placed in root project folder and some subfolders. I can not enter breakpoint  in headers from start, and now I found that gdb kind of hung in template function, if I enter it by step and than place a new breakpoint inside. WinXP SP3, last TDM gcc.   

[RJP Computing]

I can work on an example, but do the inline templates of the example I posted have anything to do with that? I should also mention that the header is in a sub-directory that is three levels down. (<proj_root>\wxtools\wx\serialization\combobox.h)

I shouldn't need to ask this, but are you sure you're compiling without any optimization flags and with debugging info turned on?

Yes I have them on.

[ollydbg]

I have the interests for testing, if you can supply a test case.

[RJP Computing]

Alright I wrote a small example that shows the bug. I attached the source to this post. Just make a new console project and add the files to the project.

Here are some things I found:

• Only set a breakpoint in the file wxtools\wx\serialization\combobox.h. It will not set the breakpoint.
• If you set a breakpoint in a cpp (headerbrk.cpp) that includes the header then it will set the breakpoint properly.

[attachment deleted by admin]

[TDragon]

Sorry, works fine for me. GCC 4.3.3 TDM-1, GDB 6.8-mingw-3. Screenshot attached.

[attachment deleted by admin]

[RJP Computing]

I am trying this using 'gdb.exe' and can't get it to stop. I tried in C::B and sure enough it is breaking like it should. So... I am assuming C::B is doing something right that I am not. Sorry for my noise, but I am trying to continue to use gdb so I would like some help. Can you use MSys or something and use just the 'gdb.exe'.

Also I understand that this is not a C::B related issue so should it be moved to a different forum/email/something?

[TDragon]

Before trying it in C::B, I tried it from command-line gdb with

Code Select Expand


break template_headerbrk.h:12

which worked fine for me, as did

Code Select Expand


break "C:\path\to\headerbrk\wxtools\wx\serialization\template_headerbrk.h":12


So I have no idea what the problem on your end is.

And, yes, unless you come up with a scenario that breaks in C::B, I suspect this has gone off-topic.

[RJP Computing]

Before trying it in C::B, I tried it from command-line gdb with

Code Select Expand


break template_headerbrk.h:12

which worked fine for me, as did

Code Select Expand


break "C:\path\to\headerbrk\wxtools\wx\serialization\template_headerbrk.h":12


So I have no idea what the problem on your end is.

Thanks. I had tried a few sytax's and now that works. I am not very familiar with gdb.exe so I was trying to follow the earlier post in this thread that was using gdb.exe. I will let my issues rest. Again thanks for your patience and understanding.

And, yes, unless you come up with a scenario that breaks in C::B, I suspect this has gone off-topic.

Correct. And sorry for the noise.

[nenin]

<***> So I have no idea what the problem on your end is. <***>

I figured out  a case (at least, my case). I have a complicated project structure, with sources in the set of folders.
C::B sets breakpoint as:
"c:/MinGW/run/prj_root/template_header.hpp:13
But in gdb console path to this line looks like:
At c:/MinGW/run/prj_root/v01/../template_header.hpp:13
"v01" is a folder, where template from "template_header.hpp" was instated.
So, if I send to gdb
break c:/MinGW/run/prj_root/v01/../template_header.hpp:13
it works. But C::B  can not set a breakpoint properly. 

[ollydbg]

<***> So I have no idea what the problem on your end is. <***>

I figured out  a case (at least, my case). I have a complicated project structure, with sources in the set of folders.
C::B sets breakpoint as:
"c:/MinGW/run/prj_root/template_header.hpp:13
But in gdb console path to this line looks like:
At c:/MinGW/run/prj_root/v01/../template_header.hpp:13
"v01" is a folder, where template from "template_header.hpp" was instated.
So, if I send to gdb
break c:/MinGW/run/prj_root/v01/../template_header.hpp:13
it works. But C::B  can not set a breakpoint properly. 

Maybe, this is the issue that cb treat differently with relative path and absolute path. I encountered this kind of problem when I want to debug into the wxWidgets source(at that time, I use wxPack), but it failed.

See the post:
http://forums.next.codeblocks.org/index.php/topic,9744.0.html

But no body replied there.

[TDragon]

See the post:
http://forums.next.codeblocks.org/index.php/topic,9744.0.html

But no body replied there.

That might be because your issue there is almost entirely unrelated.

But in gdb console path to this line looks like:
At c:/MinGW/run/prj_root/v01/../template_header.hpp:13
"v01" is a folder, where template from "template_header.hpp" was instated.
So, if I send to gdb
break c:/MinGW/run/prj_root/v01/../template_header.hpp:13
it works. But C::B  can not set a breakpoint properly. 

If verified, this appears to be a bug in GDB.

[ollydbg]

I know, and it is frustrating that I can't come up with a test case as I did for the previous problem. I am currently working on a fairly large program; and every now and then, when I set a break in a header file, the debugger fails. I keep wondering if it is perhaps a problem with the project search directories, but I have not been able to identify anything obvious. Thanks again for your good work.

@rhf

I meet the same problem when I'm include an inline function header in many CPP files, then setting brekpoints may fails.

But I have solved the problem by adding GCC options. You can see this post, maybe, it's the cause of your problem.

http://forums.next.codeblocks.org/index.php/topic,10508.msg73723.html#msg73723

[rhf]

@rhf
I meet the same problem when I'm include an inline function header in many CPP files, then setting brekpoints may fails.
But I have solved the problem by adding GCC options. You can see this post, maybe, it's the cause of your problem.
http://forums.next.codeblocks.org/index.php/topic,10508.msg73723.html#msg73723

I have been following that thread. The next time I have the problem, which seems to occur only with my larger, more complicated projects, I will definitely try the compiler options. Thanks very much!