Re: [9fans] prof

["D. Brownlee" <ancipites@earthlink.net>]

forsyth@vitanuova.com wrote:
> 
> >>Another question: has anyone done anything with the
> >>compiler to generate a static flow graph -- something
> >>like 'cflow'?
> 
> i have changes to one of the linkers somewhere.
> it also checked stack depth.

I got curious and came up with this after a minor change:

%term diff /sys/src/cmd/8l/pass.c pass.c
306a307
>		mydiag("%s calls %s", TNAME, s->name);
308d308
<			diag("undefined: %s in %s\n", s->name, TNAME);

void mydiag(char *fmt, ...); -- after diag() in list.c


This yields alot of lines of the form:

	caller calls callee

It looks like a fairly simple job for 'awk', maybe 'rc', to
process those lines and produce the flow graph. Thanks for
the clue about using the linker instead of the compiler; I'll
even get things that were written in assembler.

Later,

D. Brownlee