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

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:

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
/* 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))
if (p[0] == '.' && strchr (p, ':') == NULL)

I am intending to get to this, but it will probably not be until later
this coming week.


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.
> 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?

ollydbg from code::blocks' forum

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