I'm trying to track down a rogue die in a large system that contains a lot of eval'd code. I was going to use a $SIG{__DIE__} handler to collect system state info at die, something like this: 
#!/usr/bin/perl
use strict;
use warnings;

# create a die handler - this will have stack trace
#  and global var dump in RL
local $SIG{__DIE__} = sub { print "REAL DIE CAPTURED @_\n"; exit(0); }
+;

# localize the die handler (works as expected)
print "eval die with local __DIE__ sig handler:\n";
eval {
    local $SIG{__DIE__};
    die "OMG - someone killed kenny";
};
if ($@)
{
    print "Eval die captured: $@\n";
}

# no local die triggers handler above - expected, but unwanted.
print "eval die without local __DIE__ sig handler:\n";
eval {
    die "OMG - someone killed kenny";
};
if ($@)
{
    print "Eval die captured: $@\n";
}

# real die, works as expected when previous case commented out
print "REAL die:\n";
die("This is a real error");

print "\nDie failed...\n";

[download]

But, as you can see, I would have to find every eval and add in a localized $SIG{__DIE__} to override the newly defined global.

Is there any way I can force all evals to ignore the global handler and carry on as normal? Or am I going about this the wrong way? Perhaps I need to dive back into Carp to see what I'm missing. Hmmmm...

Thoughts anyone?

In reply to forcing eval'd die to ignore global $SIG{__DIE__} handler by cLive ;-)

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.