- linaro-toolchain - lists.linaro.org

by Yvan Roux

== Progress == o Linaro GCC validation (8/10) * Reviewed, validated and committed more backports * New stability issues after executor number increased * Started to script branch merge * Developed a new tool to avoid wasting time in gerrit/jenkins/logs navigation o Upstream GCC (1/10) * Looked at and updated some bugzillas o Misc (1/10) * Various meetings == Plan == o Continue backports/validation/branch merge

9 years, 8 months

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[ACTIVITY] 31th Aug - 04th Sep

by Kugan

== Progress == * Widening pass (TCWG-547) – 6/10 - Looked at “Error: unaligned opcodes detected in executable segment” * Spent lot of time trying to understand the root cause. * Got some suggestions from Jim and looking into it. - Posted some of the important patches for review. * https://gcc.gnu.org/ml/gcc-patches/2015-09/msg00399.html * https://bugs.linaro.org/show_bug.cgi?id=1318 (2/10) - Tried reproducing with the source provided without success. - Could build and reproduce with emacs-24.4 release. - Trunk GCC version 6.0.0 20150902 works. - GCC version 4.9.3 20150209 (Linaro GCC 4.9-2015.02) fails. * Misc - 2/10 - gcc-patches, gcc-bugs list == Plan == * Continue with widening pass * Fix Bug1318

9 years, 8 months

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[ACTIVITY] 31st August - 4th September

by Bernie Ogden

Holiday [4/10] Multinode wrapper - TCWG-350 [2/10] * Merged to benchmarking branch, roughly documented * Tested & added job definition templates Setting up VPN [2/10] * Much struggling with mutt, pgp, VM vs real system, Mac vs Linux * Still not working, but wrote up what I've learned on the Collaborate page Misc [2/10] * ARM admin, meetings, mail, etc etc =Plan= Last pass through benchmarking presentation Finish multinode/updating benchmarking docs Back to Juno noise control experiments Back to Jenkins - get it to drive multinode

9 years, 8 months

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[ACTIVITY] 24th - 28th August

by Bernie Ogden

(Reporting with new Jira numbers) Holiday [6/10] Investigate effectiveness of noise control - TCWG-358 [2/10] * Learned to build OE filesystems * Got Juno running with more or less provenance-tracked firmware, kernel, filesystem Misc - [2/10] * Pushed through some updates to benchmark sources * Struggled with Collaborate permissions to share source/results handling rules * Remaining multinode tests passed

9 years, 8 months

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[Weekly] 31 AUGUST - 04 SEPTEMBER 2015

by Michael Collison

== This week == * TCWG-832 -Exploit vector multiply by scalar instructions when multiple scalars are used as coefficients in a loop (4/10) - Continued investigation. * TCWG-833 - Exploit Wide Add operations when appropriate (4/10) - Reworked Aarch64 patch to avoid redundant moves - Sent patch upstream for review - Debugging Aarch64 tree-dump regression suite failures - Bugzilla 57195 (mode iterator bug) blocked compiling new pattern (1/10) - Separated patch from Bugzilla 67321 patch and sent upstream - Pinged upstream for comments * Misc (1/10) - Conference calls == Next week == - USA Labor day holiday, September 7th - Additional investigation into TCWG-832

9 years, 8 months

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[ACTIVITY] 31st August - 04 September 2015

by Prathamesh Kulkarni

== This Week == * TCWG-120 (8/10) - Resolved df issue in my patch, sent to tcwg list for review, - VRP makes the issue latent at -O2. Reproducible with -fno-tree-vrp - Taking another approach to run a "specialized" combine pass before combine pass that folds arm_andsi3_insn/arm_cmpsi_insn to zeroextracsi_compare0_scratch or andsi3_compare0_scratch without relying on combine. Patch: http://pastebin.com/gLVg7pbN Asm diff at -O1: http://pastebin.com/yXBHHkhM Asm diff at -O2 -fno-tree-vrp: http://pastebin.com/EKj6hXkt * Misc (2/10) - Meetings - Had a look at vect test-cases failing due to LTO == Issues == - No access to Juno - Can't login to IRC via ZNC (can connect directly). == Next Week == - Continue with TCWG-120 - Start looking at TCWG-80

9 years, 8 months

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[ACTIVITY]

by Renato Golin

== Progress == * Holidays (4/10) * Buildbots (2/10) - Several breakages, Clang alignment issue sill breaking self-hosted bots... * Maintenance (2/10) - Backtracks on the TargetParser, code heavily modified, discussions ensued. - Helping Vinicius with __aeabi_memcpy in the kernel * Releases (0/10) - Release 3.7.0 final validated / uploaded - Waiting for final switch * Background (2/10) - Code review, meetings, discussions, etc. - Backlog of emails, reviews == Plan == Look at libc++ / RT / unwind again see if I can reduce the errors in both AArch64 and ARM to zero. == Issues == The power cuts and the effect it had on my buildbots made me spend 3 days of my holidays to fix. Other buildbot breakages made me spend another 2, and I couldn't wait until I was back, or it would have wasted an entire week (as it has happened before). In a nutshell, I can't have holidays. Yay!

9 years, 8 months

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[ACTIVITY] 31th Aug - 04th Sep

by Yao Qi

# Progress # * Holiday on Monday [2/10] * TCWG-857, [4/10]. All the multi-arch work are done (I hope) but patches can't be sent out until kernel patches are pushed in upstream. ** Collect some arguments from kernel folks to defend my change "32-bit CPSR to 64-bit PSTATE". Patch is posted out. ** Finish the patch to convert siginfo_t between 32-bit debuggee and 64-bit debugger. Done. Will post it next week. ** Get right TLS base in multi-arch debugging. Patch is done. * Happen to see we can improve GDB performance in some case by avoid sending some packets. Patch is done, but need to collect some performance data. [2/10] * Misc [1/10] ** Close some tickets, TCWG-567, TCWG-876, as they are done. * TCWG-757 [1/10], many patches review. # Plan # * Continue to upstream multi-arch patches. * Upgrade my juno board kernel to git master to test kernel patches for multi-arch debugging work properly. * Collect some GDB performance data for my patch. -- Yao

9 years, 8 months

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Odd Linaro GCC 4.8 2015.06 behavior with precompiled headers

by Dragan Stancevic

Hi- It seems that there is some discrepancy between Linaro GCC 4.8 2015.06 and Linaro GCC 4.8 2014.11 with regards to precompiled headers. It appears that 2015.06 doesn't even attempt to open the precompiled headers according to strace. I have been looking on gcc mailing list but have not been able to find any fixes related to precompiled headers. Does anyone have any pointers as to what should I be looking at to get to the bottom of this issue? This simple program compiles without any problems on 2014.11, but fails on 2015.06 because 2015.06 doesn't even attempt to read tst.h.gch created by "make header" dragans@tst:~$ cat Makefile PROJ=tst CC=arm-linux-gcc LD=arm-linux-ld all: header $(PROJ) header: $(PROJ)._ cp $(PROJ)._ $(PROJ).h $(CC) -x c-header -c $(PROJ).h $(PROJ): $(RM) $(PROJ).h $(CC) $(PROJ).c -o $(PROJ) clean: $(RM) $(PROJ).h.gch $(PROJ).h $(PROJ) dragans@tst:~$ cat tst._ #include <stdio.h> dragans@tst:~$ cat tst.c #include "tst.h" int main(int argc, char**argv) { char *s = "Test"; printf("%s\n", s); return 0; }

9 years, 8 months

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[ACTIVITY] 24 - 28 August 2015

by Omair Javaid

== Progress == LLDB development -- Testing and bug fixing lldb on hikey AArch64 [TCWG-886] [7/10] -- Improve error handling of AArch64 watchpoint code. Submitted, got reviewed and committed http://reviews.llvm.org/D12328 -- Looked into ways to improve watchpoint installation lag. -- Looked into issues pertaining to un-alligned watchpoints installation. -- Committed upstream arm hardware breakpoint and watchpoint support [TCWG-770] [TCWG-794] [1/10] -- Ran lldb testsuite in various combinations to figure out Arm and AArch64 status [1/10] -- Testing on chromebook with precise chroot works. Miscellaneous [1/10] -- Meetings, emails, discussions etc. == Plan == LLDB development -- Try to find ways to debug lldb-server platform forked gdbserver instance. -- Test, debug and fix testsuite failures on Arm and AArch64.

9 years, 8 months

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[ACTIVITY] 17 - 21 August 2015

by Omair Javaid

== Progress == LLDB development -- Testing and bug fixing lldb on hikey AArch64 [TCWG-886] [2/10] -- Looked into watchpoint tests which are still failing after committing watchpoint support and bug fixes. -- Modifications to arm hardware breakpoint and watchpoint support [TCWG-770] [TCWG-794] [7/10] -- Resubmitted the pending patch http://reviews.llvm.org/D9703 -- Testing on chromebook with precise chroot works. Miscellaneous [1/10] -- Meetings, emails, discussions etc. -- Looking into slow data transfer issues on chromebook and highkey board == Plan == LLDB development -- Get patches reviewed and committ them. -- Continue looking into tests which are still failing on Arm and AArch64 -- Run test comparison between linux x86, android arm and linux arm

9 years, 8 months

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[ACTIVITY] Week 3

by Yvan Roux

o 3 days off (6/10) == Progress == o Linaro GCC validation (3/10) * Reviewed, validated and committed on-going backports * backported more revisions o Misc (1/10) * Various meetings == Plan == o Continue backports/validation

9 years, 8 months

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[ACTIVITY] 24th - 28th August

by Kugan

== Progress == * Annual Leave (2/10) * Widening pass (TCWG-547) - 6/10 - Fixed all execution test failure. - bootstrap failure due to “Drop copy-rename” is still not resolved. Found a workaround. - Sorted debug_stmt handling * TACT 1/10 - Started looking to cross execution set-up * Misc - 1/10 - gcc-patches, gcc-bugs list == Plan == * Continue with widening pass

9 years, 8 months

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[activity] 24-49 August

by Prathamesh Kulkarni

== This Week == * TCWG-777 (3/10) - Fixed ICE with the patch - toolchain builds with the patch. - Sent patch to tcwg list for review - Investigating why combine fails to combine arm_andsi3_insn/arm_cmpsi_insn into zeroextractsi_compare0_scratch when the pass uses ud-chains to find def but works when def is found using ad-hoc way. * TCWG-871 (4/10) - Getting familiar with firefox build system - LTO build lto/non-lto on x86 and arm (doc) - Figuring out how to resolve "plugin needed to handle lto object" error. tried the following: binutils configured with: --enable-plugin, --enable-lto gcc configured with: --enable-lto --with-ld-plugin=<just built ld> Doesn't appear to work. * TCWG-835 (1/10) - Build failure with spec (PR67399) * Misc (2/10) - Meetings - Looked at rtl dataflow (df.h and df*.c) and ree.c == Next Week == Continue with TCWG-777, TCWG-835, TCWG-871

9 years, 8 months

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[Weekly] 24-28 AUGUST 2015

by Michael Collison

== This week == * TCWG-832 -Exploit vector multiply by scalar instructions when multiple scalars are used as coefficients in a loop (2/10) - Initial investigation. * TCWG-833 - Exploit Wide Add operations when appropriate (4/10) - Ramana is reviewing Aarch32 patch - Recoded Aarch64 support to use vect_select - Debugging Aarch64 lto, tree-dump regression suite failures * TCWG-834 - Use non-unit stride loads by preference when applicable (1/10) - TCWG 834 is Bugzilla 67323 upstream; Richard Biener took ownership as a vectorizer failure - My plan was to write a test case that failed until fixed, but Richard indicated this is not standard practice - Bugzilla 57195 (mode iterator bug) blocked compiling new pattern (1/10) - Separated patch from Bugzilla 67321 patch and sent upstream - Pinged upstream for comments - Bugzilla 67320 - Incorrect standard names for wide addition (1/10) - committed upstream in trunk * Misc (1/10) - Conference calls == Next week == - Resolve Aarch64 TCWG-833 patch, validate and upstream - Additional investigation into TCWG-832

9 years, 8 months

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[ACTIVITY] 24th - 28th August

by Charles Baylis

Bug 1764/PR67280 C++ wrong code bug (no card yet) [9/10] Misc [1/10]

9 years, 8 months

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[ACTIVITY] 17th - 21st August

by Charles Baylis

Holiday [2/10] Bug 1764/PR67280 C++ wrong code bug (no card yet) [4/10] Misc [4/10]

9 years, 8 months

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[ACTIVITY] 24th - 28th August

by Yao Qi

# Progress # * TCWG-857 [3/10] With one kernel fix, HW breakpoint works for unaligned address (2-byte aligned). Debug linux kernel with KGDB. KGDB exposes an existing GDB bug, I fixed it, but need some time thinking about how to submit it upstream. * TCWG-567, arm watchpoint fixes [4/10]. All fails are fixed, but need another round of test to confirm. ARM HW watchpoint doesn't work on 4.0.0 kernel, but I don't investigate on it. * TCWG-757 [2/10], some patches review. * Misc, meeting, [1/10] # Plan # * TCWG-857. * Upstream the leftover of aarch64 multi-arch patches. -- Yao

9 years, 8 months

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[ACTIVITY] Week 34

by Yvan Roux

== Progress == o Linaro GCC validation (9/10) * Analysed x86_64 fstack-protector and sse2 issue * This is due to "ulimit -v" usage which brakes asan testing and gcc testsuite caching mechanism. * Validation is now stable on Hetzner/Austin hardware * Documented summer validation issues * Validate and committed on-going backports o Upstream GCC (0/10) * Armeb OOM fix committed into gcc-5 o Misc (1/10) * Various meetings == Plan == o 3 days off o Continue backports/validation

9 years, 8 months

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[ACTIVITY] 17th - 21st August

by Kugan

== Progress == * Widening pass (TCWG-547) - 8/10 - Fixed all but one execution test failure. - aarch64 and x86 are clean - arm has one but this looks like a latent issue (in expand); looking into it - Latest trunk with aarch64 miscompiles stage2 fwprop (-fno-forwprop works). This happens with the commit 94f92c36a83d66a893c3bc6f00a038ba3dbe2a6f [PR64164] Drop copyrename, use coalescible partition as base when optimizing - Tried forcing the same promote_mode for x86_64 and can reproduce it with x86_64 also. - Looking into it to see if this is an error with the commit * Misc - 2/10 - gcc-patches, gcc-bugs list == Plan == - Continue with widening pass

9 years, 8 months

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[ACTIVITY] 17th - 21st August

by Bernie Ogden

Upcoming Absences * Away from this Wednesday until next Tuesday, inclusive Benchmark infrastructure - TCWG-360 [1/10] * Finished filling out cards/bugs for benchmarking work * Which makes the rest of this report more fine-grained Multinode wrapper - TCWG-888 [2/10] * Completed oversubscription workaround * Herded most tests through * Uncovered one significant bug, seems fixed Centralized source/results storage - TCWG-722 [1/10] * Wrote draft of source/results handling rules * Confirmed that old repos are subsets of new repos Noise control experiments - TCWG-897 [2/10] * Learned more about firmware, openembedded * Juno running a minimal filesystem, needs some tidying up Misc [4/10] * Including a further 1/10 of ARM management =Plan= * Herd remaining multinode tests through ** Depends on LAVA lab coming back from power cut ** And queues being short enough * Progress (finish?) Juno bring-up * Share source/results rules draft

9 years, 8 months

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[Weekly] 17-21 AUGUST 2015

by Michael Collison

== This week == * TCWG-833 - Exploit Wide Add operations when appropriate (8/10) - Reworked patch to use vect_select instead of unspec as requested by Ramana - Bugzilla 57195 (mode iterator bug) blocked compiling new pattern - Created patch which successfully bootstrapped - Created Bugzilla 67320 - Incorrect standard names for wide addition (documentation bug) - Successfully regression tested Aarch32 changes - Send Aarch32 patch upstream for review - Reworking patch for Aarch64 to use vect_select as well - Created Bugzilla 67321 - [ARM] Exploit wide adds when appropriate - Created Bugzilla 67322 - [Aarch64] Exploit wide adds when appropriate * TCWG-834 - Use non-unit stride loads by preference when applicable (1/10) - Created Bugzilla 67323 to track until fixed in GCC 6 by Richard Biener - Began writing test case that fails * Misc (1/10) - Conference calls == Next week == - Respond to Aarch32 TCWG-833 upstream requests and hopefully check-in patch - Complete Aarch64 TCWG-833 patch, validate and upstream - Finish testcase for TCWG-834 and submit upstream

9 years, 8 months

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[ACTIVTY]

by Renato Golin

== Progress == * Maintenance (CARD-1833 2/10) - Fixing libc++abi build on AArch64 - Trying to remove a hack in ARMTargetInfo about default CPUs - Bisecting PR24292 - Working with ARM to fix it, backport * Buildbots (CARD-1823 8/10) - Working with Adhemerval on VMA 42bits sanitizer - Setting up a libc++ "full" build on the second stage, since gcc can't build it yet. 171 tests fail. - Ubuntu Vivid (39-bits VA / 4k pages) with Uboot is the winner of stability, speed and easiness. - Power outage meant I had to unbreak *a lot* of broken stuff * Background (2/10) - Code review, meetings, discussions, etc. - Some Android/TSAN/AArch64 shenanigans == Plan == Holidays all week == Issues == Yes, it does add up to 12/10, since I had to work most of Saturday and some of Sunday to fix the mess that the power cuts made on our lab. If we had generators, that wouldn't have happened.

9 years, 8 months

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[activity] 17-21 August 2015

by Prathamesh Kulkarni

== This Week == * TCWG-835 (2/10) - Testing on SPEC CPU2006 - Found ICE while testing on spec unrelated to my patch, created reduced test-case. * TCWG-777 (2/10) - Working on RTL pass - enhanced it so it only replicates insn when required. - Prototype patch works for the test-case but ICE's during toolchain build. - Trunk generates expected output for -O2, git-bisect shows from r226516 * TCWG-871 (1/10) - Built for x86_64 non LTO - Trying to cross compile for ARM * Sick Leave (2/10) * Public Holiday (2/10) * Misc (1/10) - Meetings == Next Week == - Continue with TCWG-777, TCWG-835, TCWG-871

9 years, 8 months

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[ACTIVITY] 17-21 August 2015

by Christophe Lyon

== Progress == == Next == * GCC (4/10) - AdvSIMD failures on aarch64_be. Struggling with vectorizer regressions. * Releases/snapshots/validation (3/10) * Misc (3/10) - meetings, conf-calls, emails == Next == * GCC aarch64_be AdvSIMD * Validation / reviews / backports

9 years, 8 months

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[ACTIVITY] 17 - 21 August 2015

by Yao Qi

# Progress # * TCWG-806, aarch64 remote debugging multi-arch support. Patches are pushed in. Done. [2/10] * TCWG-857, HW breakpoint/watchpoint in multi-arch. [3/10] Both GDB and linux kernel needs some fixes. Fix one bug in GDB. Read ARMv8 manual about byte address select for thumb code (2-byte aligned instruction) and the implementation in kernel. * TCWG-757 some patches review, [1/10] * Misc [4/10] ** ARM new starter training on Wed. afternoon and Thu. ** Read early-debug https://gcc.gnu.org/wiki/early-debug # Plan # * TCWG-857. * Update the state of some old linaro tickets on GDB. -- Yao

9 years, 8 months

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Cross compile tool chain libs not found issue

by Yendapally Reddy Dhananjaya Reddy

Hi, I compiled the Linaro cross tool chain for arm v7 SOC and using the buildroot to create the images. When I use the downloaded precompiled tool chain from linaro releases, I am not facing any issues. But with compiled tool chain, multiple packages are failing with similar to below mentioned error. I tried building cross tool chain on both redhat and Ubuntu machines. When I see the difference of gcc -v, the cross compile is with "--host=x86_64-build_unknown-linux-gnu" and the pre compiled is with "--host=i686-build_pc-linux-gnu". I tried with "crosstool-ng-linaro-1.13.1-4.9-2014.08.tar.bz2" and "crosstool-ng-linaro-1.13.1-4.9-2014.09.tar.bz2". configure:25287: checking for MD5 in -lcrypto configure:25312: /projects/broadcom-linux/dhananjay/nas/iproc/buildroot/output/host/usr/bin/arm-linux-gnueabihf-gcc -std=gnu99 -o conftest -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -pipe -Os -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 conftest.c -lcrypto >&5 /projects/broadcom-linux/dhananjay/toolchain/tool9/toolchain/lib/ct-ng-linaro-1.13.1-4.9-2014.08/install/lib/gcc/arm-linux-gnueabihf/4.9.2/../../../../arm-linux-gnueabihf/bin/ld: warning: libdl.so.2, needed by /projects/broadcom-linux/dhananjay/nas/iproc/buildroot/output/host/usr/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libcrypto.so, not found (try using -rpath or -rpath-link) -bash-4.1$ uname -a Linux lab-rtp-gw-05 2.6.32-358.23.2.el6.x86_64 #1 SMP Sat Sep 14 05:32:37 EDT 2013 x86_64 x86_64 x86_64 GNU/Linux Can somebody help me here. Thanks Dhananjay

9 years, 8 months

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abe - compiling cross aarch64 toolchain using local directory

by Virendra Kumar Pathak

Hi Linaro Toolchain Group, I am trying to compiling cross aarch64-linux-gnu toolchain using local directory (tar file) for gcc. I am using file:/// as mentioned in the https://wiki.linaro.org/ABE. ../abe/abe.sh --target aarch64-linux-gnu --build all --release 20150819 --tarbin gcc=file:///home/vpathak/arm/toolchain/build/snapshots/gcc-2015.11-5.tar.bz2 But I get following error: ERROR (#146): get_URL (not supported for .tar.* files.) ERROR (#533): get_source (file:///home/vpathak/arm/toolchain/build/snapshots/gcc-2015.11-5.tar.bz2 not a valid sources.conf identifier.) TRACE(#190): checkout () ERROR (#193): checkout (No URL given!) ERROR (#161): checkout_all (Failed checkout out of gcc.) Am I missing something ? How can we use a local directory (e.g. gcc source code) for building toolchain using abe ? Please help. Thanks. -- with regards, Virendra Kumar Pathak

9 years, 8 months

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[ACTIVITY] 10 - 14 August 2015

by Omair Javaid

== Progress == LLDB development -- Testing and bug fixing lldb on hikey AArch64 [TCWG-886] [7/10] -- Submitted following fixes and got them reviewed -- http://reviews.llvm.org/D11899 -- http://reviews.llvm.org/D11902 -- http://reviews.llvm.org/D11987 Miscellaneous [3/10] -- Meetings, emails, discussions etc. -- 14th August Public Holiday == Plan == LLDB development -- Further progress on fixing test failues on hikey AArch64. -- Testsuite status compilation for armel and armhf

9 years, 9 months

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[ACTIVITY] 10-14 August 2015

by kugan

== Progress == * Short week due to GNU Cauldron Travel * Widening pass (TCWG-547) - 3/10 - Looked at the false positive warning for uninitialized variable - Have a reduced test-case and looking at ways to fix this - Split the patch for easy review - Fixed test-cases and going through all the test-case failures * Misc - 2/10 - gcc-patches, gcc-bugs list - Looked at gcc vectorization == Plan == - Widening pass

9 years, 9 months

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[ACTIVITY] Week 33

by Yvan Roux

== Progress == o Linaro GCC validation (4/10) * Validation issues investigation * Austin's APM board seems more reliable * New validation instability on x86_64 discovered: - Analysis on-going but it is related to fstack-protector * Waiting for VPN access o Upstream GCC (4/10) * Reworked OOM issue on armeb-linux-gnu target fix * Patch committed on trunk * Backport on gcc-5 validated and about to be committed o Misc (2/10) * Various meetings * Team member support == Plan == o Continue on validation o Redo FSF branch merge after big-endian fix committed.

9 years, 9 months

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[ACTIVITY] 10th - 14th August

by Bernie Ogden

Benchmark infrastructure - TCWG-360 [6/10] * Fixed remaining known critical issues in multinode ** Testing stymied by LAVA oversubscription ** Attempted to implement some workarounds for oversubscription * Some discussion/investigation on generating filesystems for benchmarking * Started brain-dumping state of infrastructure into cards.linaro.org Bringing up Juno for noise control experiments [1/10] * Some struggles with firmware/bootloader configuration Misc [3/10] Featuring some ARM management duties = Plan = * Get benchmarking tests through, if LAVA permits * Fix any critical issues discovered * Finish brain-dump into cards.l.o * Bring up Juno for noise control experiments * Some more ARM management

9 years, 9 months

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[ACTIVITY] 10-14 August 2015

by Christophe Lyon

== Progress == * GCC (4/10) - AdvSIMD failures on aarch64_be: WIP patch makes the intrinsics tests pass, but shows regressions in the vectorizer tests * Releases/snapshots/validation (2/10) - validation monitoring, fixed a couple of minor bugs * Misc (4/10) - meetings, conf-calls, emails == Next == * GCC aarch64_be AdvSIMD * Validation

9 years, 9 months

1
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[Weekly] 10-14 AUGUST 2015

by Michael Collison

== This week == * TCWG-140 - Transform end of loop conditions to min_expr (4/10) - Wrote initial test case as requested by maintainers - Need to determine how to not run test case on targets with no MIN_EXPR/MAX_EXPR * TCWG-833 - Exploit Wide Add operations when appropriate (4/10) - Fixed internal error by using unspec for vector sign/zero-extend - Fixed multiple issues with test cases - Investigating why gcc.dg/vect/slp-reduc-3.c with lto is regressing for aarch32 and aarc64 - Investigating two additional regression failures on aarch64 * TCWG-834 - Use non-unit stride loads by preference when applicable (1/10) - Spoke with Richard Biener at GNU cauldron. - He indicated this was a problem with a interaction problem with vectorizer not attempting multiple strategies - He indicated that he planned to fix this for GCC 6 and not to attempt a fix - My plan is to write a test case that fails until the issue is addressed in GCC 6 * Misc (1/10) - Conference calls == Next week == - Resolve testsuite regressions for TCWG-833 - Create bugzilla reports for TCWG-833 and TCWG-834 - Write testcase for TCWG-834 and submit upstream - Investigate TCWG-832 as time permits

9 years, 9 months

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[activity] 10 - 14 August 2015

by Prathamesh Kulkarni

== This Week == * TCWG-777 (4/10) - Working on RTL pass, prototype patch works for the test-case. - updating the trunk to r226907 , it appears combine can fold arm_andsi3_insn/arm_cmpsi_insn into zeroextractsi_compare0_scratch at -O2 while not at -O1. .* TCWG-835 (2/10) - Testing patch with Spec 2006 - Found ICE unrelated to my patch * Misc (4/10) - Travel to home from GNU Tools Cauldron 2015, Prague. == Next Week == - Continue working on TCWG-777 - Continue testing TCWG-835 patch with SPEC 2006

9 years, 9 months

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[ACTIVITY]

by Renato Golin

== Progress == * Buildbots (CARD-1823 6/10) - Setting up new APMs - Running around for a decent UEFI, Kernel, Distro - Testing different builds, configurations - Managed to get one APM doing the test-suite *only*! sigh... - http://buildmaster.tcwglab.linaro.org/builders/clang-cmake-aarch64-lnt * Background (4/10) - Code review, meetings, discussions, etc. - Doing more reviews than usual due to buildbot work being erradic - Laptop is playing stupid again == Plan == * Moar bots * Moar code review * Maybe some vodka, to wash it all up

9 years, 9 months

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[ACTIVITY] 3 - 7 August 2015

by Omair Javaid

== Progress == LLDB development -- Testing and bug fixing lldb on hikey AArch64 [TCWG-886] [9/10] -- Debugging of watchpoint test failures and problems with multiple watchpoints. -- Clean-up of AArch64 watchpoint code and fixing watchpoint cache bugs. Miscellaneous [1/10] -- Meetings, emails, discussions etc. == Plan == LLDB development -- Submit and get review on bug fixes for lldb on hikey AArch64 code changes. -- Investigate further lldb test failues on hikey AArch64. Miscellaneous -- Friday 14th August, Independence day public holiday in Pakistan.

9 years, 9 months

1
0
0 0

[ACTIVITY] Week 32

by Yvan Roux

== Progress == o Linaro GCC validation (4/10) * Look at the various validation issues we have * Dug into the logs, restarted jobs, asked to restart builders/testers. etc ... o Upstream GCC (5/10) * Investigate OOM issue on armeb-linux-gnu target * Found the issue and raised an upstream bugzilla: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67127 * Submitted a fix for it o Misc (1/10) * Various meetings == Plan == o Continue validation babysitting

9 years, 9 months

1
0
0 0

[ACTIVITY] 3-7 August 2015

by Christophe Lyon

== Progress == * GCC (4/10) - investigating AdvSIMD Failures on aarch64_be. * Releases/snapshots (1/10) - re-spin 4.9-2015.06-1 snapshot - updated list of candidate backports * Misc (4/10) - meetings, conf-calls, emails * Internal (1/10) - ST internal support == Next == * GCC aarch64_be AdvSIMD

9 years, 9 months

1
0
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[ACTIVITY]

by Renato Golin

== Progress == * Performance (CARD-1832 3/10) - Profiling SPEC2k mesa, found some issues - Investigating r232513, unlikely the culprit, but interesting case * Releases (CARD-1431 1/10) - Spinning 3.7.0 RC2 * Buildbots (CARD-1823 4/10) - Setting up new APMs - Dealing with ASAN/TSAN bot breakage - Other buildbot breakages * Background (2/10) - Code review, meetings, discussions, etc. - Writing a bisect script for LLVM

9 years, 9 months

1
0
0 0

[ACTIVITY] 27 - 31 July 2015

by Omair Javaid

== Progress == LLDB development -- Setup lldb test debug environment for testing failing tests on chromebook. [1/10] -- Debug various lldb hang scnarios on chromebook for armhf support [TCWG-855] [4/10] -- Figure out alternate fix for http://reviews.llvm.org/D11129. [TCWG-855] [3/10] Miscellaneous [2/10] -- Fix chromebook malfunction due to battery issues -- Meetings, emails, discussions etc. == Plan == LLDB development -- Debug lldb test cases on armhf to figure out problems in individual test-cases -- Create an updated lldb development project plan on JIRA. -- Update collaborate with steps on LLDB development process.

9 years, 9 months

1
0
0 0

[ACTIVITY] 27th - 31th July

by Kugan

== Progress == * Widening pass (TCWG-547) - 8/10 - Handled review comments. - Improved CONVERT_EXPR handling. - Re based and retested - found some failures. - This was due to VRP reusing the range info computed in VRP1 after type promotion is applied. Invalidating the range info when type is promoted. - ARM with type promotion now improves (-O2) about ~2.8% with one tiny benchmark (where it used to regress). - Still some test cases failures (not execution failures but scanning certain patterns in the dump/asm). * Misc - 2/10 - Connect slides. - gcc-patches, gcc-bgs list - Meetings == Plan == - Widening pass

9 years, 9 months

1
0
0 0

[Weekly] 27-31 JULY 2015

by Michael Collison

== This week == * TCWG-146 - Detect smin/umin idiom (1/10) - Incorporated final feedback and submitted code in SVN * TCWG-140 - Transform end of loop conditions to min_expr (1/10) - Misc. discussion upstream about concerning where optimization should be performed - Upstream maintainers asked me to create gimple ir test case * TCWG-833 - Exploit Wide Add operations when appropriate (1/10) - Unable to validate yet * TCWG-834 - Use non-unit stride loads by preference when applicable (5/10) - Further Aarch32 investigation to determine where decision to forgo vld3 decision is being made * Linaro connect preparation (1/10) * Misc (1/10) - Conference calls == Next week == - Validate patches for TCWG-833 and submit upstream - Further TCWG-834 investigation - GNU Cauldron conference and travel

9 years, 9 months

1
0
0 0

[activity] 27 - 31 July

by Prathamesh Kulkarni

== This Week == * TCWG-835 (4/10) - Validated and submitted patch upstream for review. - Made changes to patches according to upstream reviews. - Microbenchmarks: http://pastebin.com/tDnHZuG5 * TCWG-777 (5/10) - Investigating different ICE's caused by my gimple remove-temps pass - Looked at expansion of GIMPLE_COND - Trying to write rtl version of remove-temps pass * Misc (1/10) - Conference calls == Next Week == - Continue with TCWG-777 - GNU Tools Cauldron 2015

9 years, 9 months

1
0
0 0

[ACTIVITY]

by Renato Golin

== Progress == * Performance (CARD-1832 1/10) - Checking differences of PostRAListSched on OOO ARM cores - Not many changes, ignoring for now * Maintenance (CARD-1833 4/10) - Building libc++/abi/unwind in LLVM/Clang tree - Getting -Wa,-mfpu patches in, last important Clang driver ARM bug - Some patches to get libunwind and libc++ to compile in-tree on ARM - Fixed native sub-features detection (http://llvm.org/PR12794) * Background (5/10) - Code review, meetings, discussions, etc. - Long discussions about TargetTuple/TargetParser/Triple - Lots of patch reviews this week (I mean, *A LOT*) - Moving some machines around, checking for Chromebook batteries - Setting up cross-builder using multiarch / QEMU - Some future planning == Plan == * Look for some more performance issues in 3.7 * Try to hook up the cross-builder * Investigate libc++ check-all failures

9 years, 9 months

1
0
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[ACTIVITY] 27-31 July

by Charles Baylis

Holiday [2/10] Illness [2/10] TCWG-835 - Vector division [1/10] . patch review TCWG-867 - AArch64 post-idx addressing [4/10] . prototype patch works . vectorizer needs more work to exploit this Misc [1/10]

9 years, 9 months

1
0
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[ACTIVITY] 20-24 July

by Charles Baylis

Benchmarking [1/10] TCWG-775 NEON error messages [1/10] . AArch64 patch set approved . rebased/retested and applied TCWG-830/833/835 Vectorization project [5/10] . emails, calls, patch review TCWG-867 - AArch64 post-idx addressing [2/10] . debugging prototype patch Misc [1/10]

9 years, 9 months

1
0
0 0

[ACTIVITY] 13-17 July

by Charles Baylis

Holiday [4/10] Benchmarking [3/10] TCWG-867 - AArch64 post-idx addressing [2/10] . prototype patch Misc [1/10]

9 years, 9 months

1
0
0 0

[ACTIVITY] 27th - 31st July

by Bernie Ogden

Benchmark infrastructure - TCWG-360 [8/10] * Testing found many problems in multinode * Iterating to solutions Misc [2/10] =Plan= Holiday next week. Then back to fixing multinode, incorporating into jenkins, noise control experiments

9 years, 9 months

1
0
0 0

[ACTIVITY] 27th - 31th July

by Yao Qi

# Progress # * TCWG-806, aarch64 remote debugging multi-arch support. [4/10] Patches are posted upstream. * TCWG-860, aarch64 fast tracepoint. [1/10] Patch review and some discussions. * TCWG-757, upstream patch review. [2/10]. ** Review NIOS II R2 patches. ** Fix PR record/18691. * Misc, meeting. [3/10] # Plan # * TCWG-857, Investigate multi-arch HW watchpoint support in GDB and linux kernel. Clean up aarch64 HW watchpoint code. * GNU Tools Cauldron. -- Yao

9 years, 9 months

1
0
0 0

ABE - bug in copy_gcc_libs_to_sysroot() while building native toolchain for aarch64

by Virendra Kumar Pathak

Hi Linaro Toolchain Group, I am building a native toolchain for aarch64 with below configurations: --build=x86_64-unknown-linux-gnu --host=aarch64-linux-gnu --target=aarch64-linux-gnu. In copy_gcc_libs_to_sysroot() - which copy libgcc.a to sysroot, current implementation try to find the absolute path of libgcc.a as below : libgcc="`${local_builds}/destdir/${host}/bin/${target}-gcc -print-file-name=${libgcc}` But above line will not execute (i.e. gcc -print-file-name) on x86_64 as the toolchain is native toolchain for aarch64-linux-gnu. Thus a infinite loop will be created in copy command i.e. copying directory x in x. however, when I hard coded the libgcc.a path in my machine (as below), everything went fine. libgcc="/home/vpathak/arm/toolchain/build_abe_new/builds/destdir/aarch64-linux-gnu/lib/gcc/aarch64-linux-gnu/5.1.1/libgcc.a" I think this is a bug in ABE build infrastructure. Thanks. -- with regards, Virendra Kumar Pathak

9 years, 9 months

3
2
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RE: [ACTIVITY] 20th - 24th July

by duane＠duaneellis.com

* TCWG-806, aarch64 remote debugging multi-arch support. [4/10] Patches are done. Need to test them and polish them. Fix various multi-arch issues when --wrapper is used in GDBserver. Patches are pushed in to mainline. Could you describe this activity in more detail? Is the goal here to support mixed aarch32/aarch64 in the same GDB binary and detect the change at runtime? Thanks. -Duane

9 years, 9 months

2
1
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[ACTIVITY] 20th - 24th July

by Kugan

== Progress == * Factor conversion out of COND_EXPR - TCWG-849 (5/10) - Iterated through the review and more testing * Looked at widening pass and the test-case from Wilco (1/10) * Misc (2/10) - Connect slides. - gcc-patches, gcc-bugs list - Meetings * Sick (2/10) == Plan == - GCC Bugs - Widening pass - Linaro bug 1318

9 years, 9 months

1
0
0 0

[Weekly] 20-24 JULY 2015

by Michael Collison

== This week == * TCWG-146 - Detect smin/umin idiom (1/10) - Made change recommended upstream and resubmitted * TCWG-140 - Transform end of loop conditions to min_expr (1/10) - Validated and submitted upstream * TCWG-833 - Exploit Wide Add operations when appropriate (5/10) - Added early clobber and forced operand 0 and operand 2 to match - Finished Aarch32 by using mode iterators - Developed patch for Aarch64 - Wide add instructions are now emitted for both Aarch32 and Aarch64 * TCWG-834 - Use non-unit stride loads by preference when applicable (2/10) - Further Aarch32 investigation * Misc (1/10) - Conference calls == Next week == - Validate patches for TCWG-833 and submit upstream - Further TCWG-834 investigation - Linaro connect presentation preparation

9 years, 9 months

1
0
0 0

[activity] 20 - 24 July 2015

by Prathamesh Kulkarni

* TCWG-835 (6/10) - Looked at newton raphson method - Need to write new md pattern that matches sdiv_optab for modes == v2sf, v4sf - First attempt for patch: http://pastebin.com/NKy8WdWC * TCWG-830 (2/10) - Ran Charles's benchmarks on ARM and AArch64. - Investigating testsuite fallout for ARM patch. - Still blocked by permissions to do benchmarking * Misc (2/10) - Conference Calls - US visa collection == Next Week == - Continue with TCWG-830, TCWG-835, TCWG-777

9 years, 9 months

1
0
0 0

binutils - question on decoding decision tree for aarch64

by Virendra Kumar Pathak

Hi Linaro Toolchain Group, I am trying to learn the 'decoding decision tree' for aarch64 in binutils by trying to add a new assembly instruction 'addvp'. For example: addvp x0, x0, 9 For this, I added a entry in struct aarch64_opcode aarch64_opcode_table[] (file opcodes/aarch64-tbl.h) as below: {"addvp", 0x01000000, 0x7f000000, addsub_imm, 0, CORE, OP3 (Rd_SP, Rn_SP, AIMM), QL_R2NIL, F_SF}, ARM manual say, bit 27 & bit 28 are unallocated. Thus for addvp, I am giving opcode 01000000 (with bit 27 & 28 as 0). With this, generating object file from assembly file is successful (test.s --> test.o); but while disassembling using objdump, it say undefined instruction. >From objdump log: 81002400 .inst 0x81002400 ; undefined (but instruction was generated correct i.e. 81002400 !!!). I know since addvp is a hack instruction, it won't execute on cpu. But still disassembly should succeed. 1. Please help me in knowing what I am doing wrong here ? What else I should do to add a new instruction in binutils ? 2. I also saw some printf in opcodes/aarch64-gen.c which I guess create decoding tree (initialize_decoder_tree()). How to print them ? I made debug =1 but still print is not coming. 3. There are some auto-generated files like aarch64-asm-2.c, aarch64-dis-2.c. How to re-generate them ? Thanks. -- with regards, Virendra Kumar Pathak

9 years, 9 months

2
1
0 0

[ACTIVITY]

by Renato Golin

== Progress == * Maintenance (CARD-1833 5/10) - Building libc++/abi/unwind in LLVM/Clang tree - Fixing some build errors (D11486) - Addressing comments to submissions from last week - Committing approved ones - Re-working the others * Releases (CARD-1431 1/10) - Building 3.7.0-RC1 on ARM and AArch64, uploading * Benchmarks (CARD-716 2/10) - Running LNT, SPEC and EEMBC on ARM and AArch64 for 3.7.0 * Background (2/10) - Code review, meetings, discussions, etc. - Upgraded APM to Debian, kernel 3.16 - Perf still segfaults. :( == Plan == * Finish open reviews * Continue getting libc++ to build and pass the tests in tree * Look at some of the performance regressions in 3.7

9 years, 9 months

1
0
0 0

[ACTIVITY] 20th - 24th July

by Yao Qi

# Progress # * TCWG-806, aarch64 remote debugging multi-arch support. [4/10] Patches are done. Need to test them and polish them. Fix various multi-arch issues when --wrapper is used in GDBserver. Patches are pushed in to mainline. * TCWG-876 [1/10] Re-run GDB testsuite with incoming Linaro toolchain release. Everything looks OK. * TCWG-860, aarch64 fast tracepoint. [1/10] Polish the patches, and ready for submission. * TCWG-757, upstream patch review. [2/10]. * Misc, meeting. [2/10] # Plan # * TCWG-806, test patches on different targets, polish patches and post them for review. # Absence # 06th Aug - 10th Aug, GNU Tools Cauldron. 11th Aug - 14th Aug, Holiday. -- Yao

9 years, 9 months

1
0
0 0

[ACTIVITY] 20th - 24th July

by Bernie Ogden

Benchmark infrastructure - TCWG-360 [6/10] * Some user support/bugfixing/bugraising * Multinode job more or less working (not fully tested) * Additional restructuring got rid of some more complexity ** Though if my simplifying assumption doesn't hold, I'll have to put it back Benchmarking 101 presentation [2/10] * Ran through slides with Ryan & Maxim * Removed many slides * Collected up and categorized the removed slides ** Probably will go into future presentation(s) Misc [2/10] =Plan= * Tweak multinode a little more * Integrate multinode into Jenkins ** To the extent that I'm comfortable with the security * Read a bit about some benchmarks that aren't SPEC * Start noise control experiments (may inform presentation) =Week After Next= Holiday

9 years, 9 months

1
0
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[ACTIVITY] Week 29

by Yvan Roux

* One day off - Bastille day (2/10) == Progress == o Upstream GCC (3/10) * Finalized and committed fix in trunk for Linaro bug #416 o Linaro GCC release (4/10) * Reviewed and did more patches for tcwg-release script * Still investigate validation issues. * Prepared FSF branch merge into Linaro GCC 5 branch o Misc (1/10) * Various meetings == Plan == - Summer Holidays (2 weeks)

9 years, 9 months

1
0
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[ACTIVITY] 13-17 July 2015

by Kugan

== Progress == * Add REG_EQUAL note for arm_emit_movpair (1/10) - Patch2 ok to commit. - Ran complete validation. - Found an issue and posted a patch to fix * Factor conversion out of COND_EXPR - TCWG-849 (6/10) - Found a performance regression in tree-ssa-reasoc - Looked at the tree-ssa-reasoc code to see possible fixes - Posted an RFC patch * PR66865 - Wine segfaults from gcc in trunk (r225757) - Reproduced it but turned out not from my commit - Fixed by other PR * Misc (2/10) - Looked at interaction between gcc optimization passes - gcc-patches, gcc-bugs list - Meetings == Plan == - GCC Bugs - TACT driven optimization exploration for gcc - Linaro bug 1318

9 years, 9 months

1
0
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[ACTIVITY] 13th - 17th June

by Bernie Ogden

Benchmark infrastructure - TCWG-360 [5/10] * Worked through my Jenkins issues with Fathi, raised some tickets at him * Converting LAVA end into multinode job ** Having some trouble with multinode API Benchmarking 101 presentation [3/10] * 1/2 day of discussions/reading, full day of redrafting * Looked for Michael Hope's similar 2012 presentation ** Found slides, not video =Plan= * Complete multinode job * Integrate into Jenkins to the extent that I'm comfortable * Complete 'shareable' draft of benchmarking-101 ** And see if I have enough left over for -102, maybe -103

9 years, 9 months

1
0
0 0

[Weekly] 13-17 JULY 2015

by Michael Collison

== This week == * TCWG-140 - Transform end of loop conditions to min_expr (1/10) - Blocked waiting on validation * TCWG-833 - Exploit Wide Add operations when appropriate (7/10) - Developed patch to handle signed and unsigned cases for Aarc32 - Investigation and debugging into support for Aarch64 * TCWG-834 - Use non-unit stride loads by preference when applicable (1/10) - Initial Aarch32 investigation * Misc (1/10) - Conference calls == Next week == - Validate Aarch32 patch for TCWG-833 - Develop Aarch64 patch for TCWG-833 - Validate TCWG-140 - Make recommended fixes to TCWG-146 and resubmit upstream

9 years, 9 months

1
0
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[activity] 13 - 17 July 2015

by Prathamesh Kulkarni

* TCWG-777 (3/10) - O2 workaround: -fno-tree-pre -fno-tree-fre -fno-tree-dominator-opts -fno-gcse -fno-peephole2 - Observing rtl dumps for gcse, combine, peephole2 with different options and optimization levels. - Continued investigating ICE during gcc build with my pass applied. - Sent mail to tcwg, for further suggestions * TCWG-830 (2/10) - Verified the behavior for aarch64, and extended patch for aarc64 along same lines. - Running Charles's microbenchmarks on r1-a7 - Benchmarking setup with Bernie. Blocked by permissions, sent a mail to lava-lab, for granting requisite permissions * TCWG-835 (2/10) - observing vector and asm dumps * Misc (3/10) - Travel to Mumbai for US Visa Interview - Conference Calls == Next Week == - Continue with TCWG-777, TCWG-835, TCWG-830

9 years, 9 months

1
0
0 0

Re: abe: cross native toolchain compilation for aarch64-linux-gnu

by strongq

I'm trying to build the toolchain as win32 executable on Ubuntu with ABE. I'm pretty new with ABE. I followed the FAQ https://wiki.linaro.org/WorkingGroups/ToolChain/FAQ and Rob's post. Also checked the MakeRelease.job and slave.sh. I have all packages listed in the slave.sh installed. So I assume I have all dependencies ready for the build. Here is what I have done: Create _build subfolder beside abe CD to _build and run: ../abe/configure --with-fileserver=148.251.136.42 --with-remote-snapshots=/snapshots-ref First build this: ../abe/abe.sh --target aarch64-none-elf -build all It installed the toolchain to _build/builds/destdir/x86_64-unknown-gnu-linux. I added the bin under it to my PATH Then do 2nd round build: ../abe/abe.sh -host i686-w64-mingw32 --target aarch64-none-elf -build all However, I'm getting config error while it building libiberty: configure:5946: checking for library containing strerror Configure:5978: error: Link tests are not allowed after GCC_NO_EXECUTABLES. My understanding is that the linker cannot find glibc or eglibc. What have I missed? Any where I can find detail instruction like step by step to build Linaro toolchain for running on Windows host? Sincerely, Qyq

9 years, 10 months

4
17
0 0

[ACTIVITY]

by Renato Golin

== Progress == * Maintenance (CARD-1833 4/10) - Clang driver: - Passing -Wa,-mfpu and friends to assembler (D11147, D11148) - Passing -I to assembler (D11185) - Don't include libgcc/asm if using libunwind/libc++abi (D11153) - Asm warnings: - Trying again to look for a way to disable asm warnings from clang (D11216) * Benchmarks (CARD-716 3/10) - Benchmarking shrink-wrapping in AArch64 - Setting up LNT Benchmarks on A32/A64 - Scripts to collate / compare LNT results on the fly - Benchmarking LNT on 3.5.2 and 3.6.2 on ARM and AArch64 - Multisampling, perf, and all goodness - Getting ready to compare with 3.7.0 to come * Releases (CARD-1431 1/10) - Spinning release 3.7.0 - Many changes, CMake builds, etc. - Fixing the test-release.sh script (D11326) * Background (2/10) - Code review, meetings, discussions, etc. - Upgrading APM to Debian 3.16 == Plan == * Upstreaming pending reviews * Continue release 3.7.0, benchmark it * Start looking at the effects of the stride vectorizer on ARM/AArch64

9 years, 10 months

1
0
0 0

[Activity] July 13 - July 17

by Yao Qi

# Progress # * TCWG-806, aarch64 remote debugging multi-arch support. [6/10] Some code refactor and fix various multi-arch issues when --wrapper is used in GDBserver. Patches are being tested. * TCWG-757, Patches review. [2/10] * Misc, meeting, [2/10] # Plan # * TCWG-806, aarch64 remote debugging multi-arch support. # Absence # * 06th Aug - 10th Aug, GNU Tools Cauldron. * 11th Aug - 14th Aug, Holiday. -- Yao

9 years, 10 months

1
0
0 0

[ACTIVITY] 13-17 July 2015

by Christophe Lyon

1 day off (2/10) == Progress == * backports/release/infra (1/10) - reviews * GCC (3/10) - posted patch to fix vget_lane on armeb - investigating AdvSIMD failures on aarch64_be. Having a way to debug target code would help (qemu does not seem to support aarch64_be yet, and I use the foundation model in bare metal mode) * Misc (4/10) - meetings, conf-calls, emails == Next == Holidays until Aug 3rd.

9 years, 10 months

1
0
0 0

[ACTIVITY] 6th - 10th June

by Bernie Ogden

Benchmark infrastructure - TCWG-360 [5/10] * More thinking/prototyping sufficiently-secure Jenkins benchmarking * Converting LAVA end into multinode job Benchmarking presentation [2/10] * A couple of helpful discussions * Read a couple of helpful docs Misc [3/10] =Plan= * Complete multinode job * Settle on a plan for Jenkins * Redraft presentation

9 years, 10 months

1
0
0 0

[activity] 6 - 10 july 2015

by Prathamesh Kulkarni

== This Week == * TCWG-777 (4/10) - Resolved ICE caused by pass during gcc build but hit another ICE: http://pastebin.com/RUAY6scB - Current pass state: http://pastebin.com/AGXnSkrZ - For test-case: void f(int flags) { void foo(void); if (flags & 1) foo(); } - temporaries don't exist for -O1 - for -O2 temps introduced by peephole2 due to define_peephole2 pattern in thumb2.md:1540 http://pastebin.com/3rEF8Te4 So this intentionally transforms rtx from zeroextractsi_compare0_scratch to rtx from shiftsi3_compare0_scratch. Why is it beneficial to do this transform ? - Looking into combine pass - For above test-case works with -marm for -O2. * TCWG-830 (3/10) - trying to understand vect dump - untested patch: http://pastebin.com/K4UX5iYz * Misc (2/10) - Started looking at TCWG-835, loop vectorized on x86 but not arm - Committed fix to segfault on -dx - Conference calls == Next Week == - Continue with TCWG-777, TCWG-830, TCWG-835 - Travel to Mumbai on 14th July (Tuesday) for US Visa Interview with US Consulate.

9 years, 10 months

2
1
0 0

[ACTIVITY] Week 28

by Yvan Roux

Hospital and physio (2/10) == Progress == o Upstream GCC (2/10) * More work on ongoing patches o Linaro GCC release (3/10) * Reviewed patches for tcwg-release script * Looked at validation issues and redo backports for 5.1 o Misc (3/10) * Various meetings * Upstream libunwind support == Plan == - Continue ongoing tasks

9 years, 10 months

1
0
0 0

[ACTIVITY] 06 - 10 July 2015

by Omair Javaid

== Progress == LLDB development -- Debugging problems with process launch and debugserver crash on remote connection. [TCWG-855] [6/10] -- Caught the notorious issue mentioned above fix can be found here http://reviews.llvm.org/D11129. -- Figured arm lldb and lldbserver host builds on chromebook will put steps on collaborate LLDB page soon. [1/10] Miscellaneous [3/10] -- Travel to Islamabad for Czech Republic visa -- Meetings, emails, discussions etc. == Plan == LLDB development -- Follow up review process for process launch bug fix. -- Run testsuite for armhf and figure out issues to fix. -- Submit patches to fix build on older version of gcc. Eid Holidays 17th to 21st July 2015

9 years, 10 months

1
0
0 0

[Weekly] 06-10 JULY 2015

by Michael Collison

== This week == * TCWG-146 - Detect smin/umin idion (0/10) - Waiting for upstream approval/review * TCWG-140 - Transform end of loop conditions to min_expr (1/10) - Blocked waiting on validation * TCWG-833 - Exploit Wide Add operations when appropriate (8/10) - Mere detailed investigation - Working theory is to develop wide add rtl patterns that incorporate vec_unpack to widen 16-bit to 32-bit * Misc (1/10) - Conference calls - Conference call with Charles and Prathamesh to discuss autovectorization progress == Next week == - Validate patch for TCWG-140 - Develop patch for TCWG-833 - Validate TCWG-833 if successful patch is developed - Investigate Aarch64 implementation

9 years, 10 months

1
0
0 0

[ACTIVITY] 6-10 July 2015

by Kugan

== Progress == * Add REG_EQUAL note for arm_emit_movpair (1/10) - committed patch1 after testing again * Factor conversion out of COND_EXPR - TCWG-849 (5/10) - Gone through couple of iterations and committed the patch - There are still some improvements need as follow up patches * TACT -TCWG-851 (2/10) - Started looking into spec2k * Misc (2/10) - Looked at interaction between gcc optimization passes - gcc-patches, gcc-bugs list - Meetings == Plan == - GCC Bugs - TACT driven optimization exploration for gcc - Linaro bug 1318

9 years, 10 months

1
0
0 0

[ACTIVITY]

by Renato Golin

== Progress == * Releases (CARD-1431 1/10) - Released 3.6.2-final * Maintenance (CARD-1833 5/10) - Reducing runtime of some benchmarks in LLVM's test-suite by getting rid of millions of useless fprintf calls. - Working on https://llvm.org/PR20700 some more * Background (4/10) - Code review, meetings, discussions, etc. - Long TargetTuple review (D10969) / discussions - Replacing broken buildbot USB disks (need to buy more) - Bisecting self-hosting bot breakage - Testing patches for ARM - Jira farming == Plan == * continue PR20700 * continue review/discussion of TargetTuple * look again at PR20757 * maybe look at PR21000

9 years, 10 months

1
0
0 0

[ACTIVITY] 6-10 July 2015

by Christophe Lyon

* Off Monday (2/10) == Progress == * published linaro-4.8 and 4.9 2015.06 releases * linaro-5.1-2015.07 (1/10) - backport reviews - updated my helper script for reviews for cope with the git-only branches * upstream (1/10) - started looking at vget_lane Neon intrinsic failure on armeb * infra/release/backports (2/10) - reviews * Misc (4/10) - meetings, conf-calls, emails == Next == * Off Tuesday * backports, release, validation: update doc * backports, reviews * upstream work == Later == * Off July 18th-Aug 3rd

9 years, 10 months

1
0
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[Activity] July 6 - July 10

by Yao Qi

# Progress # * TCWG-805, aarch64 native debugging multi-arch support. [4/10] Patches are committed upstream except patches handling hardware single step on aarch32. TCWG-806, aarch64 remote debugging multi-arch support. Some code refactor. * TCWG-876, FSF GDB 7.10 release. [3/10] Update ABE config files to include GDB 7.10 branch in the build. Patch is pushed in. Look at some regressions (on all platforms) to fix. * TCWG-757, Patches review. [1/10] * TCWG-858, Patches are pushed in. [1/10] * Misc, meeting, [1/10] # Plan # * TCWG-806, aarch64 remote debugging multi-arch support. * TCWG-757, Fix regressions in FSF GDB 7.10 branch. -- Yao

9 years, 10 months

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Run time comparison of sin() in libm

by Virendra Kumar Pathak

Hi Linaro Toolchain Group, I am comparing execution time (run time) of sin() trigonometric function between following glibc (including libm) libraries for aarch64 (juno cortex a57) : Linaro glibc 2.19, Linaro eglibc 2.19, eglibc 2.19 (from http://www.eglibc.org/) and Linaro glibc 2.21. My observation for execution time of sin(): with Linaro glibc 2.19 and eglibc 2.19 = 1m24.703s (approx) whereas, with Linaro eglibc 2.19 & Linaro glibc 2.21 = 0m25.243s (approx) Has Linaro optimized the libm functions for aarch64 in Linaro eglibc 2.19 ? If yes, please point me to relevant reference from where I can find more information on them. Since the eglibc development from version 2.19 has stopped, will Linaro maintain its own development version of glibc ? I am using below snippet code and linux 'time' command to calculate the time. void sin_func(void) { double incr = 0.732; double result, count = 0.0; printf("%s\n", __func__); while (count < 105414350.0) { result = sin(count); count += incr; } } Thanks. -- with regards, Virendra Kumar Pathak

9 years, 10 months

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[Activity] June 29 - July 3

by Charles Baylis

Sick leave [2/10] (TCWG-775) NEON error messages [2/10] . validated patch, posted upstream (TCWG-831) vectorization/addressing modes [3/10] . reading/comparison of ARM vs AArch64 rtx_cost functions Misc [3/10] email etc

9 years, 10 months

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[ACTIVITY] 29 June - 03 July 2015

by Omair Javaid

== Progress == LLDB development [TCWG-855] [8/10] -- Figure out build steps for building cross lldb-server with arm-linux-genueabihf-g++ -- Debugging of lldb-server communication packets for fixing lldb-server armhf crash problem. -- Comparison with androidabi version to figure out missing pieces Miscellaneous [2/10] -- Ubuntu reinstall on laptop -- Follow up on Czech Republic visa -- Meetings, emails, discussions etc. == Plan == LLDB development -- Work on lldb-server for armhf and try to figure out crash problems [TCWG-855]

9 years, 10 months

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[ACTIVITY] Week 27

by Yvan Roux

End of sick leave (will work 100% from home until my cast is removed). == Progress == o Upstream GCC (2/6) * Back to ongoing patches o Linaro GCC release (7/6) * Reviewed FSF branch merge into 4.8/4.9 branches * Reviewed patches for tcwg-realease script * Sent a first batch of backports for 5.1 Still pending due to validation infra. issues o Misc (1/6) * Various meetings == Plan == - Continue ongoing tasks

9 years, 10 months

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[ACTIVITY] 29 June - 3 July 2015

by Yao Qi

* One day off on Fri. [2/10] # Progress # * TCWG-805, aarch64 native debugging multi-arch support. [5/10] Patches (part1) are posted upstream for review, need to rewrite some of them. The rest of them are OK and can be pushed in after 7.10 branch is created. Watchpoint support in multi-arch debugging. Both kernel and GDB need some fixes. Ongoing. * Complete the document of aarch64 tracepoint work. [1/10] * FSF GDB. [2/10] Review intel mpx patch again, and read something on intel mpx stuff. # Plan # * TCWG-805, update some patches in part 1 patch series, and continue the multi-arch watchpoint work. -- Yao

9 years, 10 months

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[ACTIVITY] 29 June - 3 July 2015

by Kugan

== Progress == * Add REG_EQUAL note for arm_emit_movpair (1/10) - Updated and reposted - https://gcc.gnu.org/ml/gcc-patches/2015-07/msg00295.html - https://gcc.gnu.org/ml/gcc-patches/2015-06/msg02066.html * Factor conversion out of COND_EXPR - TCWG-849 (3/10) - https://gcc.gnu.org/ml/gcc-patches/2015-07/msg00246.html * TACT -TCWG-851 (2/10) - Small examples now seem to work. - Have to do cross testing * Git work flow for upstream patches -TCWG-848 (1/10) - Updated based on review * Misc (3/10) - Looked up LLVM documents - Looked at the TODO list Renato provided - gcc-patches, gcc-bugs list - Meetings == Plan == - GCC Bugs - TACT driven optimization exploration for gcc - Linaro bug 1318

9 years, 10 months

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[activity] 29 Jun - 3 July 2015

by Prathamesh Kulkarni

== This Week == * TCWG-856 (2/10) - submitted patch to flatten cfgloop.h: https://gcc.gnu.org/ml/gcc-patches/2015-07/msg00277.html * TCWG-777 (4/10) - Modified pass to not generate redundant stores - Investigating ICE caused by the pass during gcc build - Discussions for possible approaches with Christophe and Kugan - Reading thru documentation on optabs and ccmp patches * Misc (4/10) - Patch sent upstream which fixes segfault in gcc for -dx option. - Filed upstream binutils bug for "branch range out of error" - Conference calls - Travel to Mumbai for US Visa OFC appointment == Next Week == - Word towards committing cfgloop.h flattening patch - Continue working on TCWG-830, TCWG-777, TCWG-847

9 years, 10 months

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[ACTIVITY]

by Renato Golin

== Progress == * Maintenance (CARD-1833 4/10) - ADD/SUB with negative immediates solved by a year old patch from ARM, sigh. On to the next bug... :( - Working on https://llvm.org/PR20700 * Buildbots (CARD-1823 2/10) - Moving benchmark bot to CMake, fixing deepcopy bug in environment that broke new builds - Restarting a few bots that crashed * Background (4/10) - Code review, meetings, discussions, etc. - A lot of code review this week... - Blocking disrespectful web spiders in llvm.org - Emacs now almost works as I expect == Plan == * Continue PR20700 * Have a look at Polybench * Look for some more bugs to fix

9 years, 10 months

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[ACTIVITY] 29th - 3rd June

by Bernie Ogden

Benchmarking presentation [7/10] * More reading * Ran through a couple more drafts Misc [3/10] * Featuring a bug in my backup scripts that took ~1/10 to fix =Plan= Back to benchmark automation as main activity Presentation in the background

9 years, 10 months

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[ACTIVITY] 29 June - 3 July 2015

by Christophe Lyon

== Progress == * linaro-4.8-2015.06 and linaro-4.9-2015.06 releases (2/10) - branch merges + validation (the 4.9 one needed several iterations) - prepared src tarballs * linaro-5.1-2015.07 (1/10) - backports reviews - problems with new validation infra * Neon intrinsics: (2/10) - added vget_lane tests. Some variants fail on armeb. * Infra/release/backports (2/10) - patches + reviews * Misc (3/10) - meetings, conf-calls, emails == Next == * Off Monday * backports, release, validation: update doc * upstream work

9 years, 10 months

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[ACTIVITY] 22 - 26 June 2015

by Omair Javaid

== Progress == LLDB development -- Support for running lldb on arm hard float abi targets [TCWG-855] [7/10] -- Built lldb-server for armhf trusty chromebook -- Figured out problem with lldb-server showing up i386-linux-gnu as target triple. -- Verfied load of arm-elf executable and breakpoint setting. -- LLDB GDBserver dies while trying to run the target. Miscellaneous [3/10] -- Playing with highkey board and setup chromebook with armhf and armel chroots on ssd. -- Preparing document for Czech Republic visa -- Meetings, emails, discussions etc. == Plan == LLDB development -- Further progress and try to fix run control on armhf targets [TCWG-855]

9 years, 10 months

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[Weekly] 22-26 JUNE 2015

by Michael Collison

== This week == * TCWG-146 - Detect smin/umin idion (1/10) - Patch sent upstream for approval * TCWG-140 - Transform end of loop conditions to min_expr (4/10) - Patch and investigating validation regressions * TCWG-833 - Exploit Wide Add operations when appropriate (4/10) - Investigation into why vectorizer does not exploit wide adds * Misc (1/10) - Conference calls - Conference call with Kugan and Prathamesh to discuss GCC Git workflow - Conference call with Charles and Prathamesh to discuss autovectorization == Next week == - Vacation

9 years, 10 months

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[ACTIVITY] 22-26 June

by Charles Baylis

== Progress == (TCWG-831) post-indexed addressing [3/10] . vectorization project kick-off call . code browsing/reading to understand mailing list feedback about previous patch (TCWG-775) NEON error messages [6/10] . completed conversion of some ARM intrinsics to give same error messages as AArch64 work . reworked tests so they can be shared between AArch64, ARM. . re-submitted previous patch with updated tests Misc [1/10] email, irc, gerrit reviews, connect travel booking, AArch64 qemu big-endian experiment == Plans == submit patch for work done so far on ARM NEON error messages cortex-a53 workarounds

9 years, 10 months

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[ACTIVITY] 22nd - 26th June

by Bernie Ogden

Benchmark automation - TCWG-360 [3/10] * Created a partial Jenkins prototype * Considered some security issues Benchmarking presentation [5/10] * Drafted some slides, did some reading Misc [2/10] =Plan= More of the above

9 years, 10 months

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[ACTIVITY] 22-26 June 2015

by Kugan

== Progress == * TCWG-849 (1/10) - Committed improvement for VRP https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=225108 * Add REG_EQUAL for arm_emit_movpair (4/10) - Posted patches for review * TACT -TCWG-851 (3/10) - Started with the small examples. - Ran into an error while tuning; looking into it * Git work flow for upstream patches -TCWG-848 (1/10) - Had a chat with Michael and Prathamesh - Tried the work-flow and now started documenting them * Misc (1/10) - gcc-patches, gcc-bugs list - Meetings == Plan == - GCC Bugs - TACT driven optimization exploration for gcc

9 years, 10 months

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[ACTIVITY] 22-26 June 2015

by Prathamesh Kulkarni

* TCWG-830 (4/10) - Observing tree dumps - Peeling for alignment happens at -O3 but not at -O2 -ftree-vectorize Reason: in vect_enhance_data_refs_alignment() for: a) -O2 -ftree-vectorize: max_allowed_peel == 0 b) -O3: max_allowed_peel == (unsigned) -1; which equals UINT_MAX and therefore peeling gets allowed. - Workaround: Pass -param vect-max-peeling-for-alignment=0 - Peeling for alignment with O2 can be enabled by passing -fvect-cost-model (we don't want this!) Reason: opts.c: /* Tune vectorization related parametees according to cost model. */ if (opts->x_flag_vect_cost_model == VECT_COST_MODEL_CHEAP) { maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS, 6, opts->x_param_values, opts_set->x_param_values); maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS, 0, opts->x_param_values, opts_set->x_param_values); maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT, 0, opts->x_param_values, opts_set->x_param_values); } The above if condition becomes false when -fvect-cost-model is passed. - Proposed patch (untested): http://pastebin.com/ftp0mrwH Patch follows the workaround and passes --param vect-max-peeling-for-alignment=0 if unaligned access is supported. * TCWG-777 (4/10) - Observing tree and rtl dumps - Workaround: for -O1 pass -fno-tree-fre -fno-tree-dominator-opts Test-case: http://pastebin.com/cjBcSpiT Generated assembly at -O1 without workaround: http://pastebin.com/jmQGZhN9 Generated assembly at -O1 with workaround: http://pastebin.com/JGj05z66 Is that the expected output for no unnecessary temps in assembly with workaround ? Is it profitable over the assembly generated without workaround ? - Approach currently taken: a) New pass "remove-temps" (for lack of better name), after nrv (added as last gimple pass). b) Transforms: if (ssa_var != 0) to new_ssa_var = SSA_NAME_DEF_STMT (ssa_var) if (new_ssa_var != 0) This "unfolds" cse on expressions within if, which was done by fre (and if fre was disabled then by dom pass). c) However this approach results in dead stores. eg: _8 = flags_7(D) & 1; if (_8 != 0) ... is transformed to: _8 = flags_7(D) & 1; _32 = flags_7(D) & 1; if (_32 != 0) ... so store to _8 is dead store. I tried to run dse after remove-temps but that didn't work. RTL 194r.jump eliminates the above dead store as "trivially dead insn". However I don't think it's a good idea to have dead stores like these in gimple and rely on RTL to eliminate them. I could try to make the pass bit smarter to not generate redundant stores like _32 != 0 in above case. d) Patch (no intent to commit as-is): http://pastebin.com/AGXnSkrZ Generated assembly at -O1 with the patch: http://pastebin.com/VmHCVpGC Patch eliminates temporaries at -O1 but not at -O2. I have not yet figured out the reason for that. For if (flags & 1), In dfinish pass for -O1, the generated RTL is from zeroextractsi_compare0_scratch while for -O2, the generated RTL is from andsi3_compare0 e) Is this a problem also on x86 ? x86 generated assembly with -O1: http://pastebin.com/XMeTXXwK * Misc (2/10) - Getting familiar with vectorizer and NEON gcc intrinsics - Reviewed git tutorials and starting preparation of git doc - Conference calls == Next Week == - Continue working on TCWG-830 and TCWG-777 - Header file flattening - Travel to Mumbai on 2nd July (Thursday) for US Visa OFC appointment.

9 years, 10 months

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[ACTIVITY]

by Renato Golin

== Progress == * Maintenance (CARD-1833 4/10) - Found the trail on the ADD/SUB with negative immediate - Submitting RFC for discussion (http://llvm.org/PR20978) - Bugzilla farming - More LNT investigations (http://llvm.org/perf/ unstable) * Releases (CARD-1431 1/10) - Building, testing and uploading 3.6.2 RC1 * Background (5/10) - Code review, meetings, discussions, etc. - More stride vectorizer code review (lnN/stN implementation) - More lab discussions (routers, lab split, new link) - Changing my dev env to emacs (huge mind set flip) == Plan == * Continue with ADD/SUB change * Continue with Emacs setup * Move benchmark bot to CMake * Some other bugs

9 years, 10 months

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[ACTIVITY] 22-26 June 2015

by Yao Qi

* One day off on Thu [2/10] # Progress # * Linaro GDB [4/10] ** TCWG-805, aarch64 native debugging multi-arch support. Prepare for the patches submission. It is a big patch series, and think about how to upstream them. Write commit log including the rationale of the changes. * FSF GDB [2/10] ** FSF GDB 7.10 release. Audit some GDB regressions caused by intel mpx stuff. ** PR 18605. Write a patch and it is in testing. ** Other patches review. * Misc [2/10] ** File expense report for Grenoble travel. ** Some discussions on aarch64 tracepoint. # Plan # * TCWG-805, upstream some patches on multi-arch debugging. -- Yao

9 years, 10 months

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[ACTIVITY] 22-26 June 2015

by Christophe Lyon

* One day off (Wed) (2/10) == Progress == * linaro-5.1-2015.06 snapshot (1/10) - dealt with tags, release notes - shared it with B&B * 4.8-2015.06 branch merge (1/10) - investigated regression: incorrect automatic merge - fixed, validation on-going * 4.9 branch (2/10) - updated our git linaro-4.9-branch to match the svn one - ready for branch merge, will be done right after fsf release * Misc (4/10) - meetings, conf-calls, emails, reviews (GCC backports, ABE, backflip) == Next == * more reviews for new backports * backports, release, validation: update doc * hopefully upstream work

9 years, 10 months

1
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[TCWG] clang/llvm build - tips and advices

by Adhemerval Zanella

Recently I came across two excellent post about accelerating clang/llvm build with different compiler/optimization [1] [2]. I tried some of author advices getting very good results. Basically I moved to optimized clang build, changed to gold linker and used another memory allocator than system glibc one. Results in build time for all the clang/llvm toolchain is summarized below (my machine is a i7-4510U, 2C/4T, 8GB, 256GB SSD): GCC 4.8.4 + gold (Ubuntu 14.04) real 85m17.640s user 257m1.976s sys 11m35.284s LLVM 3.6 + gold (Ubuntu 14.04) real 34m4.909s user 128m43.382s sys 3m51.643s LLVM 3.7 + gold + tcmalloc real 32m56.707s user 121m40.562s sys 3m52.358s Gold linker also shows a *much* less RSS usage, I am able to fully use make -j4 while linking in 8GB without issue any swapping. Two things I would add/check for the posts: 1. Change from libc to tcmalloc showed me a 3-4% improvement. I tried jemalloc, but tcmalloc is faster. I am using currently system version 2.2, but I have pushed an aggressive decommit patch to enable as default for 2.4 that might show lower RSS and latency (I will check it later). 2. First I try to accelerate my build by offloading compilation using distcc. Results were good, although the other machine utilization (i7, 4C/8T, 8GB) showed mixes cpu utilization. The problem was linking memory utilization using ld.bfd, which generates a lot of swapping with higher job count. I will try using distcc with clang. [1] http://blogs.s-osg.org/an-introduction-to-accelerating-your-build-with-clan… [2] http://blogs.s-osg.org/a-conclusion-to-accelerating-your-build-with-clang/

9 years, 10 months

2
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[ACTIVITY] 15th-19th June

by Bernie Ogden

Benchmark automation - TCWG-360 [7/10] * Arndales stopped booting ** Package servers for elderly filesystem had gone ** Investigated some approaches to creating more stable filesystems ** Realized I could just updated image to point at old-releases, so did that for now * _More_ time thinking about interactions with Jenkins & LAVA. Fathi gave me some Jenkins jobs to prototype in. * Brain-dumped some of the present state of things into Collaborate Misc - [3/10] =Plan= Jenkins prototyping

9 years, 10 months

1
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RE: windows binary builds with gdb-python enabled?

by duane＠duaneellis.com

>> Using Python to script GDB makes it much more efficient to do testing. >> Having a Python-disabled build of GDB prevents this. I use the example of the gdb-python scripts for the linux kernel. They are very useful, these do not work when using GDB from windows. -Duane

9 years, 10 months

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windows binary builds with gdb-python enabled?

by duane＠duaneellis.com

It seems the prebuilt windows releases of GDB do not enable Python. Are there plans to release a python-enabled-gdb in the windows builds? If not, what are the roadblocks to this? Thanks Example: $ ./aarch64-linux-gnu-gdb.exe GNU gdb (Linaro GDB 2015.02-3) 7.8-2014.09-1-git Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "--host=i686-w64-mingw32 --target=aarch64-linux-gnu" Type "show configuration" for configuration details. For bug reporting instructions, please see: <https://bugs.launchpad.net/gcc-linaro>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word". (gdb) python > >Scripting in the "Python" language is not supported in this copy of GDB. (gdb) quit

9 years, 10 months

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