Re: [Iverilog-devel] How to trace (debug) tgt-vvp ?

[Alan M. F. <al...@al...>]

Stephen Williams wrote:
> It's challenging, but what you do is gdb trace the ivl core program
> and break when it loads the target. At that point, gdb should load
> the symbols for the loaded module, and the rest should be obvious.

v0_8-branch has some features to assist with this.

gmake DEBUGFLAGS=-DDEBUG
turns on those features.

The Icarus Verilog Preprocessor will run and dump its standard output to 
a file. The command line arguments for ivl will appear on screen. GDB 
will start automatically, load ivl and stop at the (gdb) prompt. At this 
point, you will typically set a breakpoint, then run ivl with the 
arguments that previously appeared.

For example:

jesus% iverilog-0.8 -v -tfnf -I$DV_ROOT/design/sys/iop/include 
-cFlist.iop_top -g2 -sOpenSPARCT1 $DV_ROOT/lib/u1/u1.behV 
$DV_ROOT/design/sys/iop/common/rtl/swrvr_clib.v
Icarus Verilog version 0.8.7

Copyright 1998-2009 Stephen Williams
...
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

-v
-C/tmp/ivrlh2fbb
-C/usr/local/lib/ivl-0.8/fnf.conf
--
-
translate: /usr/local/lib/ivl-0.8/ivlpp -v -L -D__ICARUS__=1 
-f/tmp/ivrlg2fbb 
-I/space/OpenSPARC/OpenSPARCT1.1.6/design/sys/iop/include >/tmp/ivlpp_stdout
Icarus Verilog Preprocessor version 0.8.7

Copyright (c) 1999 Stephen Williams (st...@ic...)
...
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
gdb /usr/local/lib/ivl-0.8/ivl
GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
...
This GDB was configured as "sparc-sun-solaris2.10"...
(gdb) run -v -C/tmp/ivrlh2fbb -C/usr/local/lib/ivl-0.8/fnf.conf -- - 
</tmp/ivlpp_stdout
Starting program: /usr/local/lib/ivl-0.8/ivl -v -C/tmp/ivrlh2fbb 
-C/usr/local/lib/ivl-0.8/fnf.conf -- - </tmp/ivlpp_stdout
warning: Temporarily disabling breakpoints for unloaded shared library 
"/usr/lib/ld.so.1"
warning: Lowest section in /lib/libdl.so.1 is .hash at 000000b4
/usr/local/lib/ivl-0.8/system.sft: Processing System Function Table file.
Using language generation: IEEE1364-2001
...

-- 
*Alan Feldstein*
Architectural Verification Engineer, Cosmic Horizon
<http://www.alanfeldstein.com/>
al...@al... <mailto:al...@al...>
*http://www.linkedin.com/in/feldstein*
	
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