[fpc-pascal] SQLdb: problem using GDB, but do not have memleak

Marcos Douglas md at delfire.net
Tue Mar 20 14:06:05 CET 2012

On Tue, Mar 20, 2012 at 9:34 AM, Martin <lazarus at mfriebe.de> wrote:
> On 20/03/2012 12:08, Marcos Douglas wrote:
>> Hi,
>> I was testing the new connector to MSSQL when I found a problem.
>> If I compile and run in console, I have no memleak. Good. But if I put
>> a breakpoint in AConnection.Free; and press F8, I got this:
>> ,msg="Warning:\nCannot insert breakpoint -237.\nError accessing memory
>> address 0x7816cd30: Input/output error.\n"
> A negative breakpoint means internal to gdb (like a breakpoint gdb sets
> for stepping). So when you press F8 gdb apparently can't get the correct
> location where the step should end.
> Are you sure your app (and package that has debug info) are compiled:
> - with either -O0 or -O1 (no other optimization enabled)
> - your app is NOT smartlinked
> wiki.lazarus.freepascal.org/GDB_Debugger_Tips

I compile FPC using these options: UPXPROG=echo COPYTREE=echo OPT="-gl"
My applications, in debbuger mode, always use -O1 option.
I use smartlinked option just for release.

Marcos Douglas

More information about the fpc-pascal mailing list