[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 19 commits: cmm: Introduce MO_RelaxedRead

[Marge Bot (@marge-bot)]

Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC


Commits:
b8becc63 by Ben Gamari at 2023-12-27T18:17:28-05:00
cmm: Introduce MO_RelaxedRead

In hand-written Cmm it can sometimes be necessary to atomically load
from memory deep within an expression (e.g. see the `CHECK_GC` macro).
This MachOp provides a convenient way to do so without breaking the
expression into multiple statements.

- - - - -
ed6f4d7a by Ben Gamari at 2023-12-27T18:17:28-05:00
codeGen: Use relaxed accesses in ticky bumping

- - - - -
47ee0d60 by Ben Gamari at 2023-12-27T18:17:28-05:00
base: use atomic write when updating timer manager

- - - - -
52e3edec by Ben Gamari at 2023-12-27T18:17:28-05:00
Use relaxed atomics to manipulate TSO status fields

- - - - -
50b4e025 by Ben Gamari at 2023-12-27T18:17:28-05:00
rts: Add necessary barriers when manipulating TSO owner

- - - - -
c2dcf29b by Ben Gamari at 2023-12-27T18:17:28-05:00
rts: Use `switch` to branch on why_blocked

This is a semantics-preserving refactoring.

- - - - -
2adb702c by Ben Gamari at 2023-12-27T18:17:28-05:00
rts: Fix synchronization on thread blocking state

We now use a release barrier whenever we update a thread's blocking
state. This required widening StgTSO.why_blocked as AArch64 does not
support atomic writes on 16-bit values.

- - - - -
fc58298e by Ben Gamari at 2023-12-27T18:17:28-05:00
rts: Fix data race in threadPaused

This only affects an assertion in the debug RTS and only needs relaxed
ordering.

- - - - -
c57b28bf by Ben Gamari at 2023-12-27T18:17:28-05:00
rts: Fix data race in threadStatus#

- - - - -
266c20d1 by Ben Gamari at 2023-12-27T18:17:28-05:00
rts: Fix data race in Interpreter's preemption check

- - - - -
9d4afe87 by Ben Gamari at 2023-12-27T18:17:28-05:00
rts/Messages: Fix data race

- - - - -
ae1805ae by Ben Gamari at 2023-12-27T18:17:28-05:00
rts/Prof: Fix data race

- - - - -
2eeb69ac by Ben Gamari at 2023-12-27T18:17:28-05:00
rts: Use relaxed ordering on dirty/clean info tables updates

When changing the dirty/clean state of a mutable object we needn't have
any particular ordering.

- - - - -
3de7bcec by Ben Gamari at 2023-12-27T18:17:28-05:00
codeGen: Use relaxed-read in closureInfoPtr

- - - - -
8451da9b by Ben Gamari at 2023-12-27T18:17:28-05:00
STM: Use acquire loads when possible

Full sequential consistency is not needed here.

- - - - -
68e9608f by Ben Gamari at 2023-12-27T18:17:28-05:00
rts: Use fence rather than redundant load

Previously we would use an atomic load to ensure acquire ordering.
However, we now have `ACQUIRE_FENCE_ON`, which allows us to express this
more directly.

- - - - -
d31e6c66 by Ben Gamari at 2023-12-27T18:17:28-05:00
rts: Fix data races in profiling timer

- - - - -
4f0634b9 by Ben Gamari at 2023-12-27T18:17:28-05:00
Add Note [C11 memory model]

- - - - -
3f93b494 by Xiaoyan Ren at 2023-12-27T18:17:32-05:00
Do not color the diagnostic code in error messages (#24172)

- - - - -


30 changed files:

- compiler/GHC/Cmm/Expr.hs
- compiler/GHC/Cmm/Info.hs
- compiler/GHC/Cmm/MachOp.hs
- compiler/GHC/Cmm/Parser.y
- compiler/GHC/Cmm/ThreadSanitizer.hs
- compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
- compiler/GHC/CmmToAsm/PPC/CodeGen.hs
- compiler/GHC/CmmToAsm/Wasm/FromCmm.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/CmmToC.hs
- compiler/GHC/CmmToLlvm/CodeGen.hs
- compiler/GHC/StgToCmm/Ticky.hs
- compiler/GHC/StgToCmm/Utils.hs
- compiler/GHC/Types/Error.hs
- libraries/base/src/GHC/Event/Thread.hs
- rts/Exception.cmm
- rts/HeapStackCheck.cmm
- rts/Interpreter.c
- rts/Messages.c
- rts/PrimOps.cmm
- rts/Proftimer.c
- rts/RaiseAsync.c
- rts/STM.c
- rts/Schedule.c
- rts/StgMiscClosures.cmm
- rts/StgStartup.cmm
- rts/ThreadPaused.c
- rts/Threads.c
- rts/TraverseHeap.c
- rts/include/Cmm.h


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/99aae0f4711e55f3b92bafe82102f77ec4fc49f7...3f93b494a0d31b26cb83ff222952f4023649c8ec

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/99aae0f4711e55f3b92bafe82102f77ec4fc49f7...3f93b494a0d31b26cb83ff222952f4023649c8ec
You're receiving this email because of your account on gitlab.haskell.org.


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/ghc-commits/attachments/20231227/5c287617/attachment-0001.html>