[cdt-dev] DSF debug sets wrong breakpoint from another project with same

[Andy Jin <AJin@xxxxxxx>]

I have two very simple c projects, "mingw1" and "mingw2". They were created by running the CDT new "HelloWorld" project wizard, so both projects have only one source file named "main.c". I attached my two projects to this message.

I built both projects using MingW toolchain, add one breakpoint in "mingw1/main.c" at line 16, and debug the second project "mingw2". In the debug, I select the DSF "Create Process Launcher", and unselect the "stop at main()" option.

Since I only have one breakpoint defined in "mingw1/main.c", I don't expect my debug of "mingw2" will stop. But in fact it stops at line 16 of "mingw2/main.c".

Looking at the gdb trace console I see the below section:

209,146 9-file-exec-and-symbols --thread-group i1 C:/workspace/PureCDT/mingw2/Debug/mingw2.exe

209,178 10-list-thread-groups

209,178 9^done

209,178 (gdb) 

209,193 11-break-insert --thread-group i1 -f main.c:16

209,193 10^done,groups=[{id="i1",type="process",executable="c:\\workspace\\purecdt\\mingw2\\debug\\mingw2.exe"}]

209,193 (gdb) 

209,193 11^done,bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="0x004013a2",func="main",file="..\\src\\main.c",fullname="c:\\workspace\\purecdt\\mingw2\\src\\main.c",line="16",times="0",original-location="main.c:16"}

It's clearly that it uses just the base name of the source file when adding breakpoint, and it successfully finds "main.c" in the "mingw2" project so the breakpoint is added.

I only see this on Windows, Linux and Mac don’t have this problem. I tried the same on Mac and the gdb trace console shows below section:

482,001 5-file-exec-and-symbols /Users/ajin/workspace/mgrC-MacOSX2/Debug/mgrC-MacOSX2

482,027 5^done,time={wallclock="0.02525",user="0.01502",system="0.00724",start="1323888482.001276",end="1323888482.026527"}

482,027 (gdb) 

482,035 8-break-insert /Users/ajin/workspace/mgrC-MacOSX/src/main.c:16

482,036 6^error,msg="No source file named /Users/ajin/workspace/mgrC-MacOSX/src/main.c."

On Mac it uses the full path to add breakpoint.

I believe this is very similar (if not exactly the same) issue with CDI debugger bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=157220. To fix that CDI debugger bug a launch configuration option "Use full file name to set breakpoints" was introduced. But this option was lost in DSF debug.

Is there an explanation why this only happens on Windows? How shall we fix it in DSF? Do we need to introduce the same option from CDI debug?

Thanks,

Andy Jin

Attachment: mingwProjects.zip
Description: mingwProjects.zip