Re: setting a breakpoint on a dll, relative path or absolute path issue

[asmwarrior <asmwarrior@gmail.com>]

On 2011-6-12 1:08, Keith Seitz wrote:
> On 06/11/2011 12:52 AM, asmwarrior wrote:
>> Can you give me a direction that I can dig into the gdb's source?
>
> This is almost certainly PR 12843:
>
> http://sourceware.org/bugzilla/show_bug.cgi?id=12843
>
> This was caused, I believe, by this patch hunk (for locate_first_half in
> linespec.c), which I committed for c++/12750 on 2011-05-31:
>
> @@ -1160,13 +1207,11 @@ locate_first_half (char **argptr, int
> *is_quote_enclosed
> break;
> }
> /* Check for the end of the first half of the linespec. End of
> - line, a tab, a double colon or the last single colon, or a
> - space. But if enclosed in double quotes we do not break on
> - enclosed spaces. */
> + line, a tab, a colon or a space. But if enclosed in double
> + quotes we do not break on enclosed spaces. */
> if (!*p
> || p[0] == '\t'
> - || ((p[0] == ':')
> - && ((p[1] == ':') || (strchr (p + 1, ':') == NULL)))
> + || (p[0] == ':')
> || ((p[0] == ' ') && !*is_quote_enclosed))
> break;
> if (p[0] == '.' && strchr (p, ':') == NULL)
>
> I am intending to get to this, but it will probably not be until later
> this coming week.
>
> Keith
>
Hi, Keith, thanks for the reply. I have reverted the patch hunk in the 
locate_first_half function and build gdb again, now, I can set 
breakpoint like:

 > break 
"E:/code/cb/test_code/debug_wx_library/debug_wx_libraryMain.cpp:101"
Breakpoint 1 at 0x401d09: file 
E:\code\cb\test_code\debug_wx_library\debug_wx_libraryMain.cpp, line 101.

So, the PR 12843 can be solved.
---------------------------------------------------------------
But what I have mentioned in my OP is another issue about setting 
breakpoint, that is:

gdb failed on setting a breakpoint on a shared dll(the dll is build with 
the relative paths)

break "E:/code/cb/wx/wxWidgets-2.8.12/src/common/string.cpp:164"
No source file named E:/code/cb/wx/wxWidgets-2.8.12/src/common/string.cpp.
Breakpoint 2 ("E:/code/cb/wx/wxWidgets-2.8.12/src/common/string.cpp:164) 
pending.
------------------------------------------------------------------
But the breakpoint can be set by using two ways below:
 > break ../../src/common/string.cpp:164
Breakpoint 3 at 0x66d89f44: file ../../src/common/string.cpp, line 164.
 >>>>>>cb_gdb:
 > break 
E:\code\cb\wx\wxWidgets-2.8.12\build\msw/../../src/common/string.cpp:164
Breakpoint 4 at 0x66d89f44: file ../../src/common/string.cpp, line 164.
-------------------------------------------------------------------
What I expect is the let the first way work.

So, I would like to find some gdb source snippet which handle the file 
path match algorithm, so that all the three methods can work. Can you 
give me a direction?

thanks.
asmwarrior
ollydbg from code::blocks' forum