#!/usr/bin/env perl

die <<EEE unless @ARGV;
Usage: $0 func1 [func2 [ ...] ]

This filter (stdin->stdout) removes lines from dbug trace that were generated
by specified functions and all functions down the call stack. Produces the
same effect as if the original source had DBUG_PUSH(""); right after
DBUG_ENTER() and DBUG_POP(); right before DBUG_RETURN in every such a function.
EEE

$re=join('|', @ARGV);

while(<STDIN>) {
  ($thd) = /^(T@\d+)/;
  print unless $skip{$thd};
  next unless /^(?:.*: )*((?:\| )*)([<>])($re)\n/o;
  if ($2 eq '>') {
    $skip{$thd}=$1.$3 unless $skip{$thd};
    next;
  }
  next if $skip{$thd} ne $1.$3;
  delete $skip{$thd};
  print;
}