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From: "tromey at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug python/16486] New: differences between "bt" and "bt no-filters"
Date: Wed, 22 Jan 2014 06:56:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=16486

            Bug ID: 16486
           Summary: differences between "bt" and "bt no-filters"
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: python
          Assignee: unassigned at sourceware dot org
          Reporter: tromey at redhat dot com

While working on a frame filter I noticed some output differences
between "bt" and "bt no-filters".  I think that if there is
a "null" filter (that just passes through the FrameDecorator objects),
then there should, ideally, be no differences between the two
cases.

Here's a frame from "bt":

#0  0x0000000000402f10 in on_generic_marshaller_1 (obj=0x615500 [Test],
v_schar=42 '*', v_uchar=43 '+', v_int=4096, v_long=8192, v_pointer=0x0,
v_double=0.5, v_float=5.5, user_data=0x0) at signals.c:400

The same frame from "bt no-filters":

#0  on_generic_marshaller_1 (obj=0x615500 [Test], v_schar=42 '*', 
    v_uchar=43 '+', v_int=4096, v_long=8192, v_pointer=0x0, v_double=0.5, 
    v_float=5.5, user_data=0x0) at signals.c:400

It may not be totally obvious here; but if you construct a test case
and make your terminal very large, you can see that the filtering
code prints the entire frame as a single long line.

The no-filter code still wraps; perhaps this is a separate bug (since
the screen size changed I would assume gdb would notice); but in any
case the wrapping and indentation looks nicer.

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