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Re: [libunwind] remote unwinding and ptrace()

From: David Mosberger
Subject: Re: [libunwind] remote unwinding and ptrace()
Date: Thu, 11 Dec 2003 14:50:41 -0800

Hi Umut,

>>>>> On Thu, 11 Dec 2003 13:54:15 -0800, Umut Aymakoglu <address@hidden> said:

  Umut> Hi - I have the following problem: The owner of the target
  Umut> process is root and the permissions are 6755 (-rwsr-sr-x). The
  Umut> program that will attach and unwind the target process does
  Umut> not have the root ownership and the permissions are
  Umut> 2755(-rwxr-sr-x).  The group ids are same on both of the
  Umut> programs. The program does a ptrace(PTRACE_ATTACH) call to
  Umut> attach the target process and receives EPERM error. The 2nd
  Umut> program can not have the root ownership. Is there a way to
  Umut> make this work?

I don't see why this is a libunwind-specific question.  If process A
cannot access process B, then how could A have any hope to unwind B,
whether or not libunwind is involved.  Am I missing something?


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