This is the mail archive of the systemtap@sourceware.org mailing list for the systemtap project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: Systemtap user space probing issue - Unknown symbol in module

From: Josh Stone <jistone at redhat dot com>
To: systemtap at sourceware dot org
Date: Mon, 18 Jul 2016 11:26:27 -0700
Subject: Re: Systemtap user space probing issue - Unknown symbol in module
Authentication-results: sourceware.org; auth=none
References: <CAPO7Hz_xNNUHOBaYAOV7G1zKr7N9W7P-wqdeiZDkn33zF8-RPA@mail.gmail.com>

On 07/18/2016 03:58 AM, buddhika chamith wrote:
> $ sudo stap -e 'probe process("./h264ref").function("*") { printf("hello\n"); }'
> ERROR: Couldn't insert module
> '/tmp/stapsPVPF2/stap_b964ab648506800b700ce82c4e1cf5cd_167937.ko':
> Unknown symbol in module
> WARNING: /usr/bin/staprun exited with status: 1
> Pass 5: run failed.  [man error::pass5]
> Tip: /usr/share/doc/systemtap/README.Debian should help you get started.

Unfortunately, this just means we got ENOENT from the init_module()
syscall, and we don't have more useful information.  But there should be
a line in dmesg that reports the specific symbol in question.

References:
- Systemtap user space probing issue - Unknown symbol in module
  - From: buddhika chamith

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]