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Re: breakpoints/1894: SIGTRAP after stepping and calling a function twice


The following reply was made to PR breakpoints/1894; it has been noted by GNATS.

From: Daniel Jacobowitz <drow@false.org>
To: fc@oasys-design.com
Cc: gdb-gnats@sources.redhat.com
Subject: Re: breakpoints/1894: SIGTRAP after stepping and calling a function twice
Date: Tue, 8 Mar 2005 15:07:36 -0500

 On Tue, Mar 08, 2005 at 07:39:59PM -0000, fc@oasys-design.com wrote:
 > 
 > >Number:         1894
 > >Category:       breakpoints
 > >Synopsis:       SIGTRAP after stepping and calling a function twice
 > >Confidential:   no
 > >Severity:       serious
 > >Priority:       medium
 > >Responsible:    unassigned
 > >State:          open
 > >Class:          sw-bug
 > >Submitter-Id:   net
 > >Arrival-Date:   Tue Mar 08 19:48:01 UTC 2005
 > >Closed-Date:
 > >Last-Modified:
 > >Originator:     fc@oasys-design.com
 > >Release:        6.3
 > >Organization:
 > >Environment:
 > Linux (Fedora Core 1-3)
 > >Description:
 > Anytime a second function is being called after a 'next' step, you get "Program received signal SIGTRAP, Trace/breakpoint trap."
 > 
 > I have a very simple testcase. Running the foll commands "break main; run; next; call foo(); call bar()" will cause the SIGTRAP. Note the 'next', as well as 2 calls, is needed to trigger this problem.
 > 
 > This fails in 6.3.0 and 6.3.50. It is ok in 5.3.90.
 > >How-To-Repeat:
 > compile bug.cc, and debug with "break main; run; next; call foo(); call bar()"
 
 I can't reproduce this.  It looks very much like a Linux kernel bug
 which I fixed last week; you may want to try a different kernel
 version.
 
 -- 
 Daniel Jacobowitz
 CodeSourcery, LLC


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