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Date: Fri, 01 Nov 2002 10:44:00 -0000
From: Kevin Buettner <kevinb@redhat.com>
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In-Reply-To: Andrew Cagney <ac131313@redhat.com>
        "Re: why is gdb 5.2 so slow" (Nov  1,  1:32pm)
References: <20021101013219.QDL1261.amsfep12-int.chello.nl@there> 
	<20021101035218.GA14509@nevyn.them.org> 
	<20021101133135.LDS1274.amsfep14-int.chello.nl@there> 
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	<20021101151639.GA3924@nevyn.them.org> 
	<3DC2B1FE.3020908@redhat.com> 
	<20021101181502.GA11243@nevyn.them.org> 
	<3DC2C8CF.9080908@redhat.com>
To: Andrew Cagney <ac131313@redhat.com>, Daniel Jacobowitz <drow@mvista.com>
Subject: Re: why is gdb 5.2 so slow
Cc: wim delvaux <wim.delvaux@adaptiveplanet.com>, gdb@sources.redhat.com
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On Nov 1,  1:32pm, Andrew Cagney wrote:

> > In any case, this reminded me of something I keep forgetting.  Modern
> > kernels a ptrace-attached process can open the child's /proc/<pid>/mem
> > and read from it.  Writing to it is disabled, and mmap is not
> > implemented (oh the violence to the mm layer if that was allowed!). 
> > But reading from it is probably faster than PTRACE_PEEKTEXT.  I'll
> > investigate.
> 
> Ah.  How does solaris work then?

On Solaris, /proc provides a complete debug interface.  On Linux, it doesn't.

Kevin