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Re: [c/4053] Re: problems debugging gcc
- From: mike stump <mrs at windriver dot com>
- To: drow at mvista dot com, neil at daikokuya dot demon dot co dot uk
- Cc: danishsamad at yahoo dot com, gcc-gnats at gcc dot gnu dot org, gcc at gcc dot gnu dot org
- Date: Tue, 4 Dec 2001 17:02:14 -0800 (PST)
- Subject: Re: [c/4053] Re: problems debugging gcc
> Date: Tue, 4 Dec 2001 16:08:45 -0500
> From: Daniel Jacobowitz <drow@mvista.com>
> To: Neil Booth <neil@daikokuya.demon.co.uk>
> For the curious, this is the exact same problem as c/4053.
> > This happens to me very frequently; I have no idea what causes it. I
> > have a sneaking suspicion that this GCC bug is what the original post
> > was about, though I'm not sure.
> Well, it isn't in the debug format code; the file information in the
> RTL is wrong. And there's nothing obviously incorrect about the code
> in cb_file_change...
> Aha, I think I see it. cb_file_change updates input_filename as it
> reads. Compile the testcase from the PR with a breakpoint on
> cb_file_change and a breakpoint on emit_line_note. If I had to guess,
> I'd say that the problem was input_filename describing the state of the
> lexer where it used to describe the state of the parser. In
> c_expand_body is the line:
> init_function_start (fndecl, input_filename, DECL_SOURCE_LINE (fndecl));
> DECL_SOURCE_LINE is fine. input_filename isn't.
Ok, since you did all the hard work, test out the below, and let us
know if it works. Could someone else run a dejagnu run on it, then we
can submit it for inclusion.
2001-12-04 Mike Stump <mrs@wrs.com>
* c-decl.c (c_expand_body): Use the name of the file associated
with the fndecl, not the current input filename.
*** c-decl.c.~1~ Tue Dec 4 16:52:33 2001
--- c-decl.c Tue Dec 4 16:54:14 2001
*************** c_expand_body (fndecl, nested_p, can_def
*** 6889,6895 ****
/* Initialize the RTL code for the function. */
current_function_decl = fndecl;
! init_function_start (fndecl, input_filename, DECL_SOURCE_LINE (fndecl));
/* This function is being processed in whole-function mode. */
cfun->x_whole_function_mode_p = 1;
--- 6889,6897 ----
/* Initialize the RTL code for the function. */
current_function_decl = fndecl;
! init_function_start (fndecl,
! DECL_SOURCE_FILE (fndecl),
! DECL_SOURCE_LINE (fndecl));
/* This function is being processed in whole-function mode. */
cfun->x_whole_function_mode_p = 1;
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