This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
Re: [PATCH] PowerPC: use libgcc _Unwind functions to get backtrace
- From: Steven Munroe <munroesj at linux dot vnet dot ibm dot com>
- To: Adhemerval Zanella <azanella at linux dot vnet dot ibm dot com>
- Cc: "GNU C. Library" <libc-alpha at sourceware dot org>
- Date: Mon, 22 Jul 2013 08:21:25 -0500
- Subject: Re: [PATCH] PowerPC: use libgcc _Unwind functions to get backtrace
- References: <51EB297C dot 30104 at linux dot vnet dot ibm dot com>
- Reply-to: munroesj at us dot ibm dot com
On Sat, 2013-07-20 at 21:21 -0300, Adhemerval Zanella wrote:
> This patch changes the way backtraces are obtained on PowerPC by
> relaying on libgcc _Unwind function instead of just backchain parse.
> It fixes debug/tst-backtrace5 for PPC32 and PPC64.
Is this really necessary? And what are the performance implications?
On platforms that switched to using the Unwinder a number of performance
tools have been rendered useless due to poor performance. I don't want
that to happen on PowerPC.
What is the issue with tst-backtrace5 and is the test case really valid?