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Re: C++ Typedefs and symbol tables
- From: Daniel Jacobowitz <drow at false dot org>
- To: Andrew STUBBS <andrew dot stubbs at st dot com>
- Cc: GDB List <gdb at sourceware dot org>
- Date: Mon, 20 Aug 2007 13:18:03 -0400
- Subject: Re: C++ Typedefs and symbol tables
- References: <46C9CB12.5000004@st.com>
On Mon, Aug 20, 2007 at 06:10:42PM +0100, Andrew STUBBS wrote:
> Hi,
>
> I have encountered a problem setting breakpoints on overloaded C++ functions:
> when I specify the function signature, I have to use the canonical type name,
> not the typedef name used in the source I am looking at. (I am aware it prompts
> where no signature is given, but that possibility is not available to scripts,
> for example).
Check whether you are ending up with a search based on the function's
symbol or minsym. The mangled name always uses the canonical type
name (for obvious ABI reasons).
> The dwarf debug information, on the other hand, shows the function with the
> typedef name used in the source code. It also contains the proper mapping from
> typedef name to actual class name.
>
> Would it not be possible to use the debug information, where available, to
> canonicalize the type names before attempting to match the function signatures,
> at least for the purposes of setting breakpoints?
Yes, but it's a lot of work. We can not currently canonicalize
anything during lookup because we do not canonicalize during symbol
reading; and just turning that on slows things down considerably. The
cp-names.y parser was intended for exactly this.
--
Daniel Jacobowitz
CodeSourcery