Re: [Review] Remove procfs dependency of truss

From: Ed Maste <ed.maste_at_gmail.com>
Date: Wed, 4 Apr 2007 17:06:21 -0400
On Wed, Apr 04, 2007 at 02:16:02PM +0200, Ed Schouten wrote:

> Indeed. Looking at sys/ptrace.h, there are a lot of instructions that
> aren't documented in the manpage:
>
> - PT_GETNUMLWPS
> - PT_GETLWPLIST
[...]

Yeah, it's unfortunate that these aren't documented and ptrace seems to
be somewhat mysterious.

I ran across this while starting to work on switching gcore from procfs
to ptrace, in the context of getting it to understand threads.  (Procfs
provides /proc/pid/regs, which returns only the register set for the
first thread in the process.  There are other XXXKSE gotchas in the
procfs source too.)

Ed Maste
Received on Wed Apr 04 2007 - 19:30:02 UTC

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