Activity log for bug #1236746

Date Who What changed Old value New value Message
2013-10-08 08:54:33 Fathi Boudra bug added bug
2013-10-15 12:17:14 Matthias Klose bug task added systemtap (Ubuntu)
2013-10-15 12:17:28 Matthias Klose tags arm64 ftbfs
2014-02-13 11:39:30 Riku Voipio linaro-aarch64: importance Undecided Medium
2014-02-13 11:39:32 Riku Voipio linaro-aarch64: status New Fix Committed
2014-05-16 13:50:12 Matthias Klose linaro-aarch64: status Fix Committed New
2014-05-30 05:47:09 Riku Voipio linaro-aarch64: status New In Progress
2015-09-23 19:52:00 dann frazier nominated for series Ubuntu Trusty
2015-09-23 19:52:00 dann frazier bug task added systemtap (Ubuntu Trusty)
2015-09-23 19:52:34 dann frazier systemtap (Ubuntu): status New Fix Released
2015-09-23 20:43:28 dann frazier description systemtap needs Aarch64 port [Impact] systemtap is not available on arm64 in trusty. As mentioned below, having a systemtap deb isn't sufficient in itself to use systemtap - there are also kernel feature dependencies like kprobes, which have not landed yet in upstream or Ubuntu. However, those patches exist, and can be applied for debugging purposes. [Test Case] I rebuilt an Ubuntu 3.13 kernel with kprobes patches applied - git branch here: The test case I used is the included hello world. When it works: $ stap ./testsuite/systemtap.examples/general/helloworld.stp hello world [Regression Risk] My backport cherry-picks several changes back from 2.7 upstream: > Update-autoconf-related-files-to-support-aarch64.patch > Update-gettext-related-material.patch These two patches refresh autoconf/gettext files to recognize arm64. We've done this for many packages when porting them to arm64 without problem, so regression risk should be low here. > Add-am64-support.patch > Basic-SystemTap-support-for-aarch64.patch > Add-basic-aarch64-support-for-kprobes.patch > Add-basic-print_regs-support-for-aarch64.patch > Add-tapset-arm64-aux_syscalls.stp.patch > Add-MMPAP_SYSCALL_NO-and-other-defines-in-runtime-sy.patch > Normalize-aarch64-to-arm64-to-match-SystemTap-s-idea.patch > Add-backtrace-support-for-aarch64.patch > Estimate-the-frequency-of-the-arch64-get_cycle.patch The changes in these files are all gated by arch-specific checks. That is, they are encapsulated in #ifdef (__aarch64__) or $(uname -m) = "aarch64". Since we haven't previously had an arm64 port, regression risk is minimal. > Flip-condition-so-proper-default-picked-for-STAP_NOP.patch This flips an #ifdef condition around so that the default nop instruction for unknown archs is different. It is easy to see that the nop instruction for all previously-supported Ubuntu archs remains the same as before. > Make-the-DDEBUG_UNWIND-output-more-tolerant-of-types.patch This adds casting to some debugging statements to allow them to compile on arm64. The casting method is based on kernel documentation and hasn't changed again upstream in a year and 2 releases, so it seems safe.
2015-09-23 20:48:22 dann frazier systemtap (Ubuntu Trusty): status New In Progress
2015-09-23 20:48:24 dann frazier systemtap (Ubuntu Trusty): assignee dann frazier (dannf)
2015-09-30 14:37:59 Chris J Arges systemtap (Ubuntu Trusty): status In Progress Fix Committed
2015-09-30 14:38:02 Chris J Arges bug added subscriber Ubuntu Stable Release Updates Team
2015-09-30 14:38:07 Chris J Arges bug added subscriber SRU Verification
2015-09-30 14:38:14 Chris J Arges tags arm64 ftbfs arm64 ftbfs verification-needed
2015-09-30 20:25:10 dann frazier tags arm64 ftbfs verification-needed arm64 ftbfs verification-done
2015-10-07 16:18:48 Launchpad Janitor systemtap (Ubuntu Trusty): status Fix Committed Fix Released
2015-10-07 16:18:53 Chris J Arges removed subscriber Ubuntu Stable Release Updates Team