Re: More than one stabn for the same PC

[Mark Mitchell <mark@codesourcery.com>]

>>>>> "Jeffrey" == Jeffrey A Law <law@cygnus.com> writes:

    Jeffrey>   In message
    Jeffrey> < 19991129223717L.mitchell@codesourcery.com >you write:
    >> >>>>> "Jeffrey" == Jeffrey A Law <law@cygnus.com> writes:
    >> 
    Jeffrey> Though I am curious, how does this happen?
    >>  We tend to do this with inlining.  (We're doing it more with
    >> inlining-on-trees, but we used to do it anyhow.)  Consider:
    >> 
    >> int i; inline int f () { i = 3; } void g() { f(); }
    >> 
    >> In `g' we first emit a line note for the line with the curly
    >> brace for `g', then emit a line note for the line with `i = 3'
    >> in it.  I think that's roughly the right thing, but the
    >> debugger gets confused.

    Jeffrey> Looking at that I'd claim only one of the line notes
    Jeffrey> should exist (probably the one of the "i = 3" statement.

That's not entirely unreasonable.  But, I'd like to be able to say
`break at <line where call to f is>' and have something sensible
happen.

--
Mark Mitchell                   mark@codesourcery.com
CodeSourcery, LLC               http://www.codesourcery.com
From law@cygnus.com Mon Nov 29 23:29:00 1999
From: Jeffrey A Law <law@cygnus.com>
To: Mark Mitchell <mark@codesourcery.com>
Cc: gdb@sourceware.cygnus.com, gcc@gcc.gnu.org
Subject: Re: More than one stabn for the same PC 
Date: Mon, 29 Nov 1999 23:29:00 -0000
Message-id: <28424.943946812@upchuck>
References: <19991129232529S.mitchell@codesourcery.com>
X-SW-Source: 1999-q4/msg00364.html
Content-length: 1240

  In message < 19991129232529S.mitchell@codesourcery.com >you write:
  > >>>>> "Jeffrey" == Jeffrey A Law <law@cygnus.com> writes:
  > 
  >     Jeffrey>   In message
  >     Jeffrey> < 19991129223717L.mitchell@codesourcery.com >you write:
  >     >> >>>>> "Jeffrey" == Jeffrey A Law <law@cygnus.com> writes:
  >     >> 
  >     Jeffrey> Though I am curious, how does this happen?
  >     >>  We tend to do this with inlining.  (We're doing it more with
  >     >> inlining-on-trees, but we used to do it anyhow.)  Consider:
  >     >> 
  >     >> int i; inline int f () { i = 3; } void g() { f(); }
  >     >> 
  >     >> In `g' we first emit a line note for the line with the curly
  >     >> brace for `g', then emit a line note for the line with `i = 3'
  >     >> in it.  I think that's roughly the right thing, but the
  >     >> debugger gets confused.
  > 
  >     Jeffrey> Looking at that I'd claim only one of the line notes
  >     Jeffrey> should exist (probably the one of the "i = 3" statement.
  > 
  > That's not entirely unreasonable.  But, I'd like to be able to say
  > `break at <line where call to f is>' and have something sensible
  > happen.
Good point.  Considering that, both line notes are probably needed.

jeff