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.\" ========================================================================
.\"
.IX Title "Devel::CallTrace 3pm"
.TH Devel::CallTrace 3pm "2022-12-04" "perl v5.36.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Devel::CallTrace \- See what your code's doing
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
#!/usr/bin/perl \-d:CallTrace
.PP
package foo;
.PP
sub bar {
  print \*(L"bar\en\*(R";
  \fBbaz()\fR;
}
.PP
sub baz {
    print \*(L"boo\en\*(R";
}
.PP
\&\fBfoo::bar()\fR;
.SH "RATIONALE"
.IX Header "RATIONALE"
There are a number of perl modules in the \s-1CPAN\s0 that are designed to trace
a program's execution as it runs. Each uses a different trick to do its job, 
but none of them quite met my needs.  The technique this module uses is quite 
simple and seems to be quite robust.
.SS "DB::sub"
.IX Subsection "DB::sub"
perl will automatically call DB::sub on each subroutine call and leave it up
to us to dispatch to where we want to go.
.SS "Devel::CallTrace::called"
.IX Subsection "Devel::CallTrace::called"
This routine is called with two parameters:
.IP "\s-1DEPTH\s0" 4
.IX Item "DEPTH"
The integer \*(L"depth\*(R" that this call is being called at.
.IP "\s-1PARAMS\s0" 4
.IX Item "PARAMS"
A reference to the routine's \f(CW@INC\fR
.PP
To get at the subroutine that was being called, have a look at \f(CW$DB::sub\fR
.SH "BUGS"
.IX Header "BUGS"
It uses the debugger. How could it not have bugs?
.SH "SEE ALSO"
.IX Header "SEE ALSO"
perldebguts, \s-1DB\s0, a licensed therapist.
.PP
trace \- Uses source filters. Scares me.
.PP
Devel::TraceCalls \- Very robust \s-1API.\s0 The code seems to do all sorts of scary
magic
.PP
Debug::Trace \- Uses symbol table magic to wrap your functions.
.PP
Devel::TRaceFuncs \- Requires developers to instrument their source files.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2005 Jesse Vincent <jesse@bestpractical.com>
.PP
This module may be redistributed under the same terms as perl itself