Bug 113032
| Summary: | Failed analysis of shared libraries with .debug files | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Raw Hide | Reporter: | William Cohen <wcohen> |
| Component: | oprofile | Assignee: | William Cohen <wcohen> |
| Status: | CLOSED RAWHIDE | QA Contact: | David Lawrence <dkl> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 1.0 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | oprofile-0.8-0.20040121.1 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2004-01-22 22:38:58 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: | |||
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030922 Description of problem: Shared libraries (.so files) leave the symbols for the functions in the code. The .debug file only has the debugging information with line information. When analyzing the shared library OProfile checks to see if there is a corresponding .debug file for the .so file. If the debuginfo rpm is installed, the .debug file for the shared libraries is used rather than the shared library. However, all the symbols are in the .so file, not the .debug file. OProfile's opreport cannot generate per-function accounting of the samples when there is a valid .debug file for the shared library. Either the .debug file needs to have the symbols or OProfile needs to check the .so file for symbols. Version-Release number of selected component (if applicable): oprofile-0.7.1-0.20031124.3 How reproducible: Always Steps to Reproduce: 1. With machine with OProfile set up collect some samples. As root /usr/bin/opcontrol --setup --vmlinux=/boot/vmlinux-`uname -r` /usr/bin/opcontrol --start /usr/bin/opcontrol --dump 2. Find a .so file with samples opreport --long-filenames (pick out .so with samples, e.g. /lib/ld-2.3.2.so) rpm -qf /lib/ld-2.3.2.so (install debuginfo rpm for the associated rpm) rpm -Uvh glibc-debuginfo-2.3.2-101.1 3. opreport -l image:/lib/ld-2.3.2.so Actual Results: get (no symbols) for the shared libaries $ opreport -l image:/lib/ld-2.3.2.so CPU: P4 / Xeon, speed 2386.63 MHz (estimated) Counted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (count cycles when processor is active) count 100000 samples % symbol name 137 100.000 (no symbols) Expected Results: list out samples for the functions in /lib/ld-2.3.2.so like the following $ opreport -l image:/lib/ld-2.3.2.so CPU: P4 / Xeon, speed 2386.63 MHz (estimated) Counted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (count cycles when processor is active) count 100000 samples % symbol name 621 71.6263 _dl_sysinfo_int80 60 6.9204 do_lookup_versioned 26 2.9988 strcmp 19 2.1915 _dl_lookup_versioned_symbol_internal 14 1.6148 _dl_map_object_from_fd ... Additional info: opreport analysis will work if the debuginfo rpm for the shared library is removed.