[fpc-devel] fp IDE with libgdb

[Jonas Maebe]

On 05 Oct 2009, at 15:27, Mark Morgan Lloyd wrote:

> The fp IDE can drive libgdb to do straightforward debugging on x86  
> and ARM, there might be failures with complex stuff that I've not  
> been able to test. Those two platforms are no problem, the problems  
> are on PowerPC and SPARC.

You're really picking your fights, aren't you? :) The textmode IDE is  
probably the least maintained part of FPC currently, and Linux/SPARC  
is not exactly the most used release either :)

> -----8<-----
> $ gdb testC1A1
> GNU gdb 6.8-debian
> ..
> (gdb) dir ..
> Source directories searched: /home/markMLl/sparc-2.2.4-6.3/..:$cdir: 
> $cwd
> (gdb) run
> Starting program: /home/markMLl/sparc-2.2.4-6.3/testC1A1
> Hello, World!
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00010138 in WRITELN2 (STR=Cannot access memory at address 0xd48656c
> ) at test.pas:11
> 11          IF ptr^ = 0 THEN
> (gdb) bt
> #0  0x00010138 in WRITELN2 (STR=Cannot access memory at address  
> 0xd48656c
> ) at test.pas:11
> #1  0x000101bc in main () at test.pas:18
> (gdb)
> ----->8-----
>
> Note that the code is correct: it's output the Hello World message  
> even though subsequently the debugger is confused.

d48656c = #13'Hel'. gdb on SPARC is trying to dereference the string  
itself. I've fixed this in r13813 in trunk.


Jonas