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In order to make the packages in this repo "reinstallable", we need to
associate source code with a specific packages. Having a top level
`/includes` dir that mixes concerns (which packages' includes?) gets in
the way of this.
To start, I have moved everything to `rts/`, which is mostly correct.
There are a few things however that really don't belong in the rts (like
the generated constants haskell type, `CodeGen.Platform.h`). Those
needed to be manually adjusted.
Things of note:
- No symlinking for sake of windows, so we hard-link at configure time.
- `CodeGen.Platform.h` no longer as `.hs` extension (in addition to
being moved to `compiler/`) so as not to confuse anyone, since it is
next to Haskell files.
- Blanket `-Iincludes` is gone in both build systems, include paths now
more strictly respect per-package dependencies.
- `deriveConstants` has been taught to not require a `--target-os` flag
when generating the platform-agnostic Haskell type. Make takes
advantage of this, but Hadrian has yet to.
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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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Previously no attempt was made to avoid multiple threads writing their
capability-local eventlog buffers to the eventlog writer simultaneously.
This could result in multiple eventlog streams being interleaved. Fix
this by documenting that the EventLogWriter's write() and flush()
functions may be called reentrantly and fix the default writer to
protect its FILE* by a mutex.
Fixes #18210.
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This exposes a set of interfaces from the GHC API for configuring
EventLogWriters. These can be used by consumers like
[ghc-eventlog-socket](https://github.com/bgamari/ghc-eventlog-socket).
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This moves all URL references to Trac Wiki to their corresponding
GitLab counterparts.
This substitution is classified as follows:
1. Automated substitution using sed with Ben's mapping rule [1]
Old: ghc.haskell.org/trac/ghc/wiki/XxxYyy...
New: gitlab.haskell.org/ghc/ghc/wikis/xxx-yyy...
2. Manual substitution for URLs containing `#` index
Old: ghc.haskell.org/trac/ghc/wiki/XxxYyy...#Zzz
New: gitlab.haskell.org/ghc/ghc/wikis/xxx-yyy...#zzz
3. Manual substitution for strings starting with `Commentary`
Old: Commentary/XxxYyy...
New: commentary/xxx-yyy...
See also !539
[1]: https://gitlab.haskell.org/bgamari/gitlab-migration/blob/master/wiki-mapping.json
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`EventLogWriter.h` doesn't use anything from `Rts.h`, the include is
redundant. This include is ignored when we include
```
Rts.h -> RtsAPI.h -> rts/EventLogWriter.h -> Rts.h
```
but can can cause problem when we include `RtsApi.h` directly with
errors like
```
In file included from /usr/lib/ghc-8.6.2/include/RtsAPI.h:20:
In file included from
/usr/lib/ghc-8.6.2/include/rts/EventLogWriter.h:14:
In file included from /usr/lib/ghc-8.6.2/include/Rts.h:185:
/usr/lib/ghc-8.6.2/include/rts/storage/GC.h:187:29: error: unknown type
name 'Capability'
StgPtr allocate ( Capability *cap, W_ n );
```
Test Plan: ./validate
Reviewers: simonmar, bgamari, afarmer, erikd, alexbiehl
Reviewed By: bgamari, alexbiehl
Subscribers: rwbarton, carter
Differential Revision: https://phabricator.haskell.org/D5395
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This both says what we mean and silences a bunch of spurious CPP linting
warnings. This pragma is supported by all CPP implementations which we
support.
Reviewers: austin, erikd, simonmar, hvr
Reviewed By: simonmar
Subscribers: rwbarton, thomie
Differential Revision: https://phabricator.haskell.org/D3482
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Currently eventlog data is always written to a file `progname.eventlog`.
This patch introduces the `flushEventLog` field in `RtsConfig` which
allows to customize the writing of eventlog data.
One possible scenario is the ongoing live-profile-monitor effort by
@NCrashed which slurps all eventlog data through `fluchEventLog`.
`flushEventLog` takes a buffer with eventlog data and its size and
returns `false` (0) in case eventlog data could not be procesed.
Reviewers: simonmar, austin, erikd, bgamari
Reviewed By: simonmar, bgamari
Subscribers: qnikst, thomie, NCrashed
Differential Revision: https://phabricator.haskell.org/D2934
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