Bug 458861
| Summary: | [RHEL5] sprof is unable to dlopen shared libraries | ||||||
|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Olivier Fourdan <ofourdan> | ||||
| Component: | glibc | Assignee: | Jakub Jelinek <jakub> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 5.2 | CC: | dmair, drepper, fweimer, jan.kratochvil, kem, philip.r.schaffner, pmuller, tao | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2009-01-20 20:50:40 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Checked in upstream. Should be backported. This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release. Another lead to follow up on. It might be that we can use some of the
userspace stap stuff. Evidently it is beginning to show up in 5.3.
Date: Fri, 17 Oct 2008 11:08:40 -0400
From: William Cohen <wcohen>
User-Agent: Thunderbird 2.0.0.16 (X11/20080723)
MIME-Version: 1.0
To: Adam Jackson <ajax>
Subject: Re: RHEL Tools roadmap (internal use only for now)
References: <48F7A4E3.3000305>
<1224254556.11508.26.camel.devel.redhat.com>
In-Reply-To: <1224254556.11508.26.camel.devel.redhat.com>
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Adam Jackson wrote:
> On Thu, 2008-10-16 at 13:32 -0700, Eric Bachalo wrote:
>> Attached is latest draft of RHEL tools roadmap slides.
>> Any comments are welcome.
>
> I note userspace probing in systemtap in 5.3. Neat! A brief search on
> the systemtap wiki isn't turning up much about how to do this though.
> Got docs?
Hi Ajax,
You might use "man stapprobes" on with the systemtap-0.7.2-1.el5 in RHELU3
beta
for more information on user-space probes.
-Will
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issue 197199
it_file 169209
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2009-0080.html |
Created attachment 314122 [details] Patch to add __RTLD_SPROF to dlopen_doit() mask Description of problem: In recent glibc such as the one included in RHEL5, sprof is not able to open shared librairies anymore. That used to work in previous versions of the glibc such as the one we shipped in RHEL4 Version-Release number of selected component (if applicable): glibc-2.5-24 How reproducible: 100% reproducible Steps to Reproduce: 1. LD_PROFILE_OUTPUT=${PWD} LD_PROFILE=libgtk-x11-2.0.so.0 gnome-calculator 2. sprof libgtk-x11-2.0.so.0 3. Actual results: sprof: failed to load shared object `libgtk-x11-2.0.so.0' Expected results: Flat profile: Each sample counts as 0.01 seconds. % cumulative self self total time seconds seconds calls us/call us/call name index % time self children called name [0] 0.0 0.00 0.00 0 g_param_spec_object [0] ... Additional info: The bug was introduced in dlfcn/dlopen.c in dlopen_doit() by adding a mask for the mode and that mode is missing __RTLD_SPROF so that sprof cannot open the shared lib. The patch attached adds __RTLD_SPROF to the mode mode so that sprof works.