[Git][ghc/ghc][wip/win32-m32] 16 commits: Bump time submodule to 1.11.1

Fri Nov 27 18:19:36 UTC 2020

Ben Gamari pushed to branch wip/win32-m32 at Glasgow Haskell Compiler / GHC

Commits:
901bc220 by Ben Gamari at 2020-11-22T12:39:02-05:00
Bump time submodule to 1.11.1

Also bumps directory, Cabal, hpc, time, and unix submodules.

Closes #18847.

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92c0afbf by Ben Gamari at 2020-11-22T12:39:38-05:00
hadrian: Dump STG when ticky is enabled

This changes the "ticky" modifier to enable dumping of final STG as this
is generally needed to make sense of the ticky profiles.

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d23fef68 by Ben Gamari at 2020-11-22T12:39:38-05:00
hadrian: Introduce notion of flavour transformers

This extends Hadrian's notion of "flavour", as described in #18942.

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179d0bec by Ben Gamari at 2020-11-22T12:39:38-05:00
hadrian: Add a viaLlvmBackend modifier

Note that this also slightly changes the semantics of these flavours as
we only use LLVM for >= stage1 builds.

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d4d95e51 by Ben Gamari at 2020-11-22T12:39:38-05:00
hadrian: Add profiled_ghc and no_dynamic_ghc modifiers

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6815603f by Ben Gamari at 2020-11-22T12:39:38-05:00
hadrian: Drop redundant flavour definitions

Drop the profiled, LLVM, and ThreadSanitizer flavour definitions as
these can now be realized with flavour transformers.

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f88f4339 by Ben Gamari at 2020-11-24T02:43:20-05:00
rts: Flush eventlog buffers from flushEventLog

As noted in #18043, flushTrace failed flush anything beyond the writer.
This means that a significant amount of data sitting in capability-local
event buffers may never get flushed, despite the users' pleads for us to
flush.

Fix this by making flushEventLog flush all of the event buffers before
flushing the writer.

Fixes #18043.

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7c03cc50 by Ben Gamari at 2020-11-24T02:43:55-05:00
gitlab-ci: Run LLVM job on appropriately-labelled MRs

Namely, those marked with the ~"LLVM backend" label

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9b95d815 by Ben Gamari at 2020-11-24T02:43:55-05:00
gitlab-ci: Run LLVM builds on Debian 10

The current Debian 9 image doesn't provide LLVM 7.

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2ed3e6c0 by Ben Gamari at 2020-11-24T02:43:55-05:00
CmmToLlvm: Declare signature for memcmp

Otherwise `opt` fails with:

    error: use of undefined value '@memcmp$def'

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635f863b by Ben Gamari at 2020-11-27T18:19:09+00:00
rts/m32: Refactor handling of allocator seeding

Previously, in an attempt to reduce fragmentation, each new allocator
would map a region of M32_MAX_PAGES fresh pages to seed itself. However,
this ends up being extremely wasteful since it turns out that we often
use fewer than this.  Consequently, these pages end up getting freed
which, ends up fragmenting our address space more than than we would
have if we had naively allocated pages on-demand.

Here we refactor m32 to avoid this waste while achieving the
fragmentation mitigation previously desired. In particular, we move all
page allocation into the global m32_alloc_page, which will pull a page
from the free page pool. If the free page pool is empty we then refill
it by allocating a region of M32_MAP_PAGES and adding them to the pool.

Furthermore, we do away with the initial seeding entirely. That is, the
allocator starts with no active pages: pages are rather allocated on an
as-needed basis.

On the whole this ends up being a pleasingly simple change,
simultaneously making m32 more efficient, more robust, and simpler.

Fixes #18980.

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4c747c28 by Ben Gamari at 2020-11-27T18:19:09+00:00
rts: Introduce mmapAnonForLinker

Previously most of the uses of mmapForLinker were mapping anonymous
memory, resulting in a great deal of unnecessary repetition. Factor this
out into a new helper.

Also fixes a few places where error checking was missing or suboptimal.

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60978706 by Ben Gamari at 2020-11-27T18:19:09+00:00
rts/linker: Introduce munmapForLinker

Consolidates munmap calls to ensure consistent error handling.

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35ab0f10 by Ben Gamari at 2020-11-27T18:19:09+00:00
rts/Linker: Introduce Windows implementations for mmapForLinker, et al.

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0bb88f57 by Ben Gamari at 2020-11-27T18:19:09+00:00
rts/m32: Introduce NEEDS_M32 macro

Instead of relying on RTS_LINKER_USE_MMAP

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f6c843a8 by Ben Gamari at 2020-11-27T18:19:09+00:00
rts/linker: Use m32 to allocate symbol extras in PEi386

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30 changed files:

- .gitlab-ci.yml
- compiler/GHC/CmmToLlvm/Base.hs
- compiler/ghc.cabal.in
- ghc/ghc-bin.cabal.in
- hadrian/doc/flavours.md
- hadrian/hadrian.cabal
- hadrian/src/Flavour.hs
- hadrian/src/Settings.hs
- − hadrian/src/Settings/Flavours/Llvm.hs
- − hadrian/src/Settings/Flavours/Profiled.hs
- − hadrian/src/Settings/Flavours/ThreadSanitizer.hs
- includes/RtsAPI.h
- includes/rts/EventLogWriter.h
- libraries/Cabal
- libraries/base/Debug/Trace.hs
- libraries/directory
- libraries/ghc-boot/GHC/Data/ShortText.hs
- libraries/hpc
- libraries/time
- libraries/unix
- rts/Capability.c
- rts/Capability.h
- rts/Linker.c
- rts/LinkerInternals.h
- rts/RtsSymbols.c
- rts/Schedule.c
- rts/Trace.c
- rts/Trace.h
- rts/eventlog/EventLog.c
- rts/eventlog/EventLog.h

The diff was not included because it is too large.

View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/267c1245823d18567e00663c10c0afd92e5b3977...f6c843a8da43748f0365fbac1b73c80883b64499

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/267c1245823d18567e00663c10c0afd92e5b3977...f6c843a8da43748f0365fbac1b73c80883b64499
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