comment on

In the debugger Devel::Trepan, there is the ability to show B:OP addresses. There is an optional plugin which allows one to disassemble Perl subroutines and packages. But what I'd like to do is to be able to disassemble a more limited region around the OP address. So how can I do that?

I know about Devel::Pointer, but I can't get that to work here:

(trepanpl): disasm Devel::Trepan::Options::whence_file
    ...    
    OP (0x9961848)
        op_next        0x9961828
        op_sibling    0
        op_ppaddr    PL_ppaddr[OP_PADSV]
        op_type        9
        op_flags    0000000
        op_private    0    
(trepanpl): sprintf "%d", 0x9961848
$DB::D[7] = 160831560
(trepanpl): $c = deref(160831560)
** Bizarre copy of UNKNOWN in scalar assignment
$DB::D[8] = <undef>

Program received signal SEGV.
Segmentation fault (core dumped)
[download]

Thoughts or suggestions?

Thanks.

In reply to Getting a B::OP from an address? by rockyb

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, 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, 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:
	&		`&`
	<		`<`
	>		`>`
	[		`[`
	]		`]`

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.