Bug 1018549
| Summary: | needless libunwind dependency | |||
|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Jan Kratochvil <jan.kratochvil> | |
| Component: | xorg-x11-server | Assignee: | X/OpenGL Maintenance List <xgl-maint> | |
| Status: | CLOSED WONTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | |
| Severity: | unspecified | Docs Contact: | ||
| Priority: | unspecified | |||
| Version: | rawhide | CC: | mjw, peter.hutterer, xgl-maint | |
| Target Milestone: | --- | |||
| Target Release: | --- | |||
| Hardware: | Unspecified | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | Doc Type: | Bug Fix | ||
| Doc Text: | Story Points: | --- | ||
| Clone Of: | ||||
| : | 1018550 (view as bug list) | Environment: | ||
| Last Closed: | 2014-03-21 01:58:18 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: | ||||
| Bug Depends On: | ||||
| Bug Blocks: | 1018550 | |||
moved upstream https://bugs.freedesktop.org/show_bug.cgi?id=70746 Discussion from upstream ended with: "That is without fork()+exec() libunwind is currently the best there is for xserver." http://lists.x.org/archives/xorg-devel/2013-October/038475.html Closing this for now |
I have found Fedora xorg-x11-server depends on libunwind. There is a longterm plan to obsolete libunwind from Fedora by new elfutils unwinder. But xorg-x11-server does not even need any external (non-glibc) unwinder. According to http://pkgs.fedoraproject.org/cgit/xorg-x11-server.git/tree/0001-os-use-libunwind-to-generate-backtraces.patch you do only self-backtrace (called local unwinding by libunwind). glibc backtrace() can do the same. According to the sample backtrace in the patch above the backtrace addresses there are the same in before/after cases, libunwind only adds resolving of address -> symbol name there, IIUC. address -> symbol name resolving can be done with RH-supported elfutils package, a simple self-backtrace with symbol resolving is for example: http://people.redhat.com/jkratoch/backtracei.c