Bug 1473486

Summary:	SystemTap: user_string2() is not available.
Product:	Red Hat Enterprise Linux 7	Reporter:	Tetsuo Handa <penguin-kernel>
Component:	systemtap	Assignee:	Frank Ch. Eigler <fche>
Status:	CLOSED NOTABUG	QA Contact:	qe-baseos-tools-bugs
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.4	CC:	jistone, lberk, mcermak, mjw, penguin-kernel
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2017-07-21 18:22:32 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Tetsuo Handa 2017-07-21 01:27:02 UTC

Description of problem:

I noticed that some systemtap scripts fail because user_string2() is not
available with RHEL 7.4 beta's systemtap-3.1-3.el7.src.rpm package.

It seems that user_string2() became unavailable by

https://sourceware.org/git/gitweb.cgi?p=systemtap.git;a=blobdiff;f=tapset/uconversions.stp;h=ad5cd18a16663711d76aba6c2572119dff095a7f;hp=73898a87b26bf0fb3402ed42d81c4cb30364589f;hb=9da5c6e0fe733593803c168ff0ae912c15b4ce57;hpb=0cc9fa0d4a6220f7754e44413071c8585fab154a

and again became available by

https://sourceware.org/git/gitweb.cgi?p=systemtap.git;a=blobdiff;f=tapset/uconversions.stp;h=0d7ec03c372992255ca7033ec39c965234c5b5cc;hp=3ca87299497288d8f19f8a1ae46a1d6cdc601778;hb=87c12247e3091646b3de869c57e8f1783a7a7b01;hpb=d082e172242c8dd34ba05211de6e535d0be720c7

. Please be sure to use updated source for RHEL 7.4's package.

Comment 2 Frank Ch. Eigler 2017-07-21 01:44:18 UTC

Thanks for the report.
For scripts that use the old user_string2() function that was temporarily deprecated, use   

% stap --version=3.0 ....

We un-deprecated it upstream out of sympathy for tapsets that unconditionally used the old name.  The new overloaded user_string() function is the one one should be building future tapsets & scripts on.

I hope that is a satisfactory solution.  (It is too late to tweak this part of rhel7.4 now.)

Comment 3 Tetsuo Handa 2017-07-21 03:28:39 UTC

The scripts which use user_string2() include probing Java methods using 3.1's behavior
(i.e. "/* java-stap ABI stap version 3.1: pass all parameters cast to strings */" ).
Thus, I won't be able to use "--version=3.0".

> The new overloaded user_string() function is the one one should be
> building future tapsets & scripts on.

OK, I can update such scripts.

> (It is too late to tweak this part of rhel7.4 now.)

I see. Please close this bug. Thank you.