== This Week ==
* ipa mod/ref analysis (2/10)
- Prototype patch now detects modifications to reference parameters
- Working on mod/ref analysis of global variables.
* PR35691 (2/10)
- Patch iterations based on upstream review
* PR35503 (2/10)
- Patch approved by Jason
- Building kernel with patch resulted in two warnings.
* Public Holidays (4/10)
== Next Week ==
- IPA mod/ref prototype
- Bugs
-- Activity --
[TCWG-683] Branch to undefined weak on aarch64 and arm
Fix in upstream review, looks pretty close to being accepted.
[TCWG-828] TLS support for static linking
In upstream review but no comments as yet
[TCWG-829] IFunc support
In upstream review, but will probably need to be rewritten after some
upstream refactoring has finished
[TCWG-911] eglibc requires a SHT_ARM_ATTRIBUTES section for dlopen to work
I have a quick hack to work round this on my Chromebook but a full fix
will take some time as lld doesn't understand build attributes right
now.
[TCWG-901] Investigate lld as a system linker
With downstream fixes, using lld as the system linker on a Chromebook I can :
- Build llvm, lld and run the regression tests successfully
- Use lld as the linker in the lnt tests successfully
- Using lld to build the shared objects used by lnt's python C
extensions was less successful. I have some interesting debugging to
do.
-- Plan --
Debug the python extension problems
Respond to upstream review comments
More use of lld as system linker
== Progress ==
* [ARM] Investigate switching from itineraries to schedule models
[TCWG-824] [4/10]
- Looked at the sched model as well as the old instruction itinerary
interfaces
- There aren't many tests that are specifically testing the scheduler,
but lots of tests break if you make enough changes to it (it's unclear
which of these are breaking intentionally and which are just poorly written)
- First step is probably to try and complete the sched model (TCWG-543),
then hunt down any differences between what we get using itineraries and
what we get with the new model
* Rewrite llvm-projs in Python [TCWG-833] [3/10]
- Reorganized the repo so we can have a separate tests directory
- Added support for parsing command line options
- Almost ready for review
* Misc [2/10]
- Catching up after vacation
- LLVM GitHub move survey
== Plan ==
* Wrap up TCWG-833
* Migrate scripts to Python 3 (TCWG-896)
* Maybe start TCWG-543 as the first step in TCWG-824
# Progress #
* TCWG-547, Change software_single_step interface to return a vector
of address. [3/10]
Patches are reviewed. V2 are posted and committed. Follow-up
patches are being tested.
* TCWG-333, Fix gdb.base/func-ptrs.exp fails in thumb mode. [3/10]
Clean up val_print, remove one redundant parameter. Patches are
being tested.
* Maintain upstream GDB, patches review, [2/10]
* OpenOCD. [2/10] Various IRC chats with maintainer about
** multi-thread support in RTOS, and multi-thread debugging,
** Release 0.10.0 and aarch64 patches merging,
** Understand aarch64 OpenOCD reads DSPSR (32-bit), so don't have to
update GDB target description now.
* Short chat with Peter Griffin on thread ids in linux-kthread.
# Plan #
TCWG-547, TCWG-333.
--
Yao Qi
# Progress #
* Fix GDBserver build on aarch64_be. [1/10]
Done. Patch is pushed in to master and 7.12 branch.
* TCWG-333, Fix gdb.base/func-ptrs.exp fails in thumb mode. [4/10]
Get anther patch and fix all regressions. In the discussion
with ppc64 and mips people on my approach.
* TCWG-518, Range stepping in arm-linux. Done. [1/10]
After pending for several months, patches are approved. Pushed
them in!
* Reproduce the GCC dwarf generation regression. [1/10]
Reported to GCC and Jakub fixed it.
* Sort out the license issue of new OCaml debugging support in gdb.
Help to clarify a little bit. [1/10]
* Discuss with OpenOCD people on supporting thread awareness for
RTOS. [1/10]
* Misc, meeting. [1/10]
# Plan #
* TCWG-333, TCWG-547
* Add new aarch64 target description for 64-bit xPSR.
--
Yao Qi
o 2 days off (4/10)
== Progress ==
o Linaro GCC/Validation (4/10)
* ABE and validation jobs reviews
* Investigating binary tarballs size reduction
o Misc (2/10)
* Various meetings and discussions.
== Plan ==
o Continue on validation
o Complete 4.9 branch merge
* TCWG-72 (2/10)
- Committed to trunk finally!
* ipa mod/ref analysis (6/10)
- Prototype in progress based on Muchnik's text
* Misc (2/10)
- Committed a trivial patch to use VAR_P in arm.c.
- Background reading on paper about virtual-ssa.
- Meetings
== Next Week ==
- Continue with mod/ref analysis
- TCWG-319
- Ping patch for GCC PR35503.
# Progress #
TCWG-845 Static linking missing linker defined symbols
- Now upstream
TCWG-829 Support for ifunc
- Patch sent upstream for review, no feedback yet. This is a bit messy
as ARM is different to other architectures so I expect this to need
reworking several times.
TCWG-828 Static linking and TLS
- Downstream patch implemented and tested, will send upstream after ifunc
TCWG-683 Support for branches to undefined weak references
- Downstream patch implemented and tested
Other:
- Downloaded and built Mozilla and Chromium so I can use them as
performance tests for lld (initially for x86_64).
- Wrote some scripts to make using lld in place of gnu ld a bit more convenient.
# Plan #
- Upstream static linking changes
- Work some infrastructure to test lld more widely on ARM.
