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Re: [Libunwind-devel] Status of "libunwind" on HPUX/IA64

From: Harald Servat Gelabert
Subject: Re: [Libunwind-devel] Status of "libunwind" on HPUX/IA64
Date: Mon, 07 Nov 2011 20:30:02 +0100
User-agent: Roundcube Webmail/0.5.4

Hello all,

I don't know if this matters for HPUX/ia64 but for linux/ia64 I submitted some patches that fixed the linunwind/1.0.1 compilation. These modifications hit the GIT but there isn't a newer release.

  So, if you plan to use linux/ia64 consider either applying this:
  or just cloning the GIT head


On Mon, 07 Nov 2011 11:52:36 -0600, Jim Galarowicz wrote:
Hi all,

As a data point, we are using a snapshot of libunwind from July, 2011
in our OpenSpeedShop performance tool for the Columbia IA64 platform
at NASA and it works well for our purposes. I have not tried the 1.0.1 release, there, but we are in the process of testing how version 1.0.1
works in our tool.

 Jim G.

 On 11/07/2011 11:45 AM, David Mosberger-Tang wrote:


I don't think anybody every seriously pursued libunwind on HP-UX
since HP-UX already had a processor-specific unwind API. I just did
some basic work to verify that libunwind could work in principle on
HP-UX. It's a fair amount of work to properly validate an unwind
library on IA-64, so if you can live with a processor-specific API,
you might be better off with Unwind or Unwind Express.

Having said that, the IA-64 tests in libunwind are quite extensive
and if you could "make check" to pass (mostly) you'd probably be in
good shape.

I haven't worked on IA-64 in several years, but I still have an
Itanium box, so I might be able to at least help make sure the
current libunwind works properly on IA-64 Linux.


On Mon, Nov 7, 2011 at 9:12 AM, Volker Simonis wrote:

Hi David,

back in 2006, you advised to better not use libunwind on

Now I saw in the current README file that the implementation on
HPUX/IA64 "Mostly works but [is] known to have some serious

What are these "serious limitations"?
Is there any documentation where we can find out more about the
limitations on HPUX?

If you would have to unwind mixed native(i.e. C/C++)/Java(i.e.
JITed/interpreted frames) on HPUX/IA64 today, would you advise to

1. vanilla libunwind
2. Unwind Express Library
3. Unwind Library

Thank you in advance and best regards,

eGauge Systems LLC, [5], 1.877-EGAUGE1, fax

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