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Re: RFA: handle zero-length types in value_from_register

From: Andrew Cagney <cagney at gnu dot org>
To: Jim Blandy <jimb at redhat dot com>
Cc: gdb-patches at sources dot redhat dot com
Date: Tue, 27 Jan 2004 08:54:19 -0500
Subject: Re: RFA: handle zero-length types in value_from_register
References: <vt21xpm6jh7.fsf@zenia.home> <40166B2D.9080506@gnu.org> <vt2vfmx5rm8.fsf@zenia.home>

Andrew Cagney <cagney@gnu.org> writes:

> 2004-01-27  Jim Blandy  <jimb@redhat.com>
> 	* findvar.c (value_from_register): If the type has no length,
> just
> 	return an acceptable value --- don't report an internal error.
>

This looks to need a test case.

I tried to put one together, but the bug only occurs when the
zero-length value is allocated to a register.  I couldn't find any way
to make that happen at all.  So the only known instance of this bug
depends on bad debug info.

The commentary should really reflect this important detail (also mention the compiler that's broken for instance). Should GDB also complain about the bogus info?

Andrew

Follow-Ups:
- Re: RFA: handle zero-length types in value_from_register
  - From: Jim Blandy

References:
- RFA: handle zero-length types in value_from_register
  - From: Jim Blandy
- Re: RFA: handle zero-length types in value_from_register
  - From: Andrew Cagney
- Re: RFA: handle zero-length types in value_from_register
  - From: Jim Blandy

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