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Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?
From: |
Dave Watson |
Subject: |
Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it? |
Date: |
Mon, 27 Mar 2017 09:17:17 -0700 |
User-agent: |
Mutt/1.6.0 (2016-04-01) |
On 03/27/17 08:46 AM, Dave Watson wrote:
> It seems like we would need to parse the unwind info for the current
> frame to correctly fill in use_prev_instr. It looks like you might be
> able to force this to happen by calling unw_get_proc_info(&c, &pip):
> in Gparser.c:fetch_proc_info will fill in use_prev_instr for the
> cursor. Does that work for you?
> fetch_proc_info checks c->use_prev_instr and, if it is set, decrements the ip
> value as its first action. Later, it might update c->use_prev_instr, but for
> the first call, I'm stuck with the initial value, as set by unw_init_local.
Ack sorry, nevermind. Yea I can't think of any way around this
without a new init function, or a heursitic to try use_prev_instr=0 if
we don't find unwind info (or something based on sigreturn maybe).
- [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/23
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Lassi Tuura, 2017/03/24
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/24
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/24
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Lassi Tuura, 2017/03/26
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/26
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Dave Watson, 2017/03/27
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?,
Dave Watson <=
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/27
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Dave Watson, 2017/03/29
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/29
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/29
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/29
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Dave Watson, 2017/03/30
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/30
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/30
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Dave Watson, 2017/03/30
- Re: [Libunwind-devel] use_prev_instr breaking unwind - how to stop it?, Doug Moore, 2017/03/30