Re: How to debug?

Re: How to debug?

[Jerry van Dijk]

> How do I inspect the call stack (preferably symbolic information i.e. source
> code unit name + line number + subprogram names), upon an unhandled
> exception occurrence?

Maybe you have an installation problem ?

If I follow the instructions in chapter 23.13.2.1 (Tracebacks From Exception 
Occurrences) in the GNAT 3.15p user manual it works:

-------------------------------------------------------------------------------
C:\home\work>cat stb.adb
with Ada.Text_IO;
with GNAT.Traceback.Symbolic;

procedure STB is

   procedure P1 is
   begin
      raise Constraint_Error;
   end P1;

   procedure P2 is
   begin
      P1;
   end P2;

   procedure P3 is
   begin
      P2;
   end P3;

begin
   P3;
exception
   when E : others =>
      Ada.Text_IO.Put_Line (GNAT.Traceback.Symbolic.Symbolic_Traceback (E));
end STB;

C:\home\work>gnatmake -g stb -bargs -E -largs -lgnat -laddr2line -lintl
gcc -c -g stb.adb
gnatbind -aO./ -E -I- -x stb.ali
gnatlink -g -lgnat -laddr2line -lintl stb.ali

C:\home\work>stb
00404F61 in ada.exceptions.process_raise_exception at a-except.adb:1320
004020D7 in <__gnat_rcheck_04> at a-except.adb:592
004015A7 in stb.p1 at stb.adb:8
004015BF in stb.p2 at stb.adb:13
004015D7 in stb.p3 at stb.adb:18
004017F1 in stb at stb.adb:22
004013CF in main at b~stb.adb:168
00401103 in ?? at fake:0
-------------------------------------------------------------------------------

-- 
--  Jerry van Dijk
--  Leiden, Holland 

Re: How to debug?

[Marius Amado Alves]

> C:\home\work>gnatmake -g stb -bargs -E -largs -lgnat -laddr2line -lintl

Thanks. I can see there are some options there that I was not passing and 
surely must. But now I get a host of "undefined reference to 
'system__parameters...'" and "...to 'system__underlying__priorities" messages 
and then gnatlink says "cannot call C:\GNAT\bin\gcc.exe". "*** Link failed."

My command was

gnatmake <unit> -f -g -IMneson -IMneson/ai302 -IAWS/include -IAWS/lib 
-IAWS/components -Io_and_ali_files -i -aOAWS/lib -bargs -E -largs -LAWS/lib 
-laws -lgnat -laddr2line -lintl

I've got GNAT installed at C:\GNAT, and the environment variables include

OS=Windows_NT
Path=C:\GNAT\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\PROGRA~1\ATT\Graphviz\bin;C:\PROGRA~1\ATT\Graphviz\bin\tools
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH
PROCESSOR_ARCHITECTURE=x86
PROCESSOR_IDENTIFIER=x86 Family 6 Model 11 Stepping 1, GenuineIntel
PROCESSOR_LEVEL=6
PROCESSOR_REVISION=0b01
SystemDrive=C:
SystemRoot=C:\WINDOWS

(They do NOT include ADA_OBJECTS_PATH et al.)

Thanks a lot.

Re: How to debug? (solved)

[Marius Amado Alves]

The Symbolic_Traceback does not work, but the non-symbolic does, and an 
"addr2line.exe" executable exists and works as expected, so I'm using these 
elements to solve the problem. Thanks.