| Commit message (Collapse) | Author | Age | Files | Lines |
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This patch makes throwTo work with -threaded, and also refactors large
parts of the concurrency support in the RTS to clean things up. We
have some new files:
RaiseAsync.{c,h} asynchronous exception support
Threads.{c,h} general threading-related utils
Some of the contents of these new files used to be in Schedule.c,
which is smaller and cleaner as a result of the split.
Asynchronous exception support in the presence of multiple running
Haskell threads is rather tricky. In fact, to my annoyance there are
still one or two bugs to track down, but the majority of the tests run
now.
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Consider
class C a where
op :: forall b. a -> b -> b
op = <rhs>
Then 'b' should be in scope in <rhs>. I had omitted this case.
This patch fixes it.
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Similar in philosophy to the 'Skipping' patch, this is another case of
printing noisy messages when no work is being done. This patch makes the
building-when-nothing-to-do case smoother.
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Following GNU make, this patch makes GHC not emit messages about modules
its skipping. This makes builds much quieter, and its a lot easier to
work out what effects a change had on the code.
The current behaviour can be recovered with -v2
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Calling prodAllCapabilities() from interruptStgRts() was wrong, for
the same reasons that we stopped doing it in handle_tick(). We now
use the same mechanism (send a byte down the pipe to the IO manager
thread), but abstract it in a wakeUpRts() function in the scheduler.
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A simple interface for generating trace messages with timestamps and
thread IDs attached to them. Most debugging output goes through this
interface now, so it is straightforward to get timestamped debugging
traces with +RTS -vt. Also, we plan to use this to generate
parallelism profiles from the trace output.
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This means we can use a %ld format specifier for StgWord/StgInt with
printf and not get shouted at by gcc.
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-vs Trace scheduler events (see also -Ds with -debug)
-vt Time-stamp trace messages
the intention is that we will pipe the -vs output into a
profile-generating tool. This commit includes the flags only,
functionality to follow.
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Previously we did this just for workers, now we do it for the main
thread and for forkOS threads too.
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The fix is a little hacky, because we don't have support for register
classes in general, but it's an improvement.
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There's no need to mark the signal handler here, because it is stored
in a StablePtr and hence is a root anyway. Furthermore, the call to
evac() was passing the address of a local variable, which turned out
to be harmless for copying GC, but fatal for compacting GC: compacting
GC assumes that the addresses of the roots are the same each time.
Fixes: possibly #783, possibly #776, definitely #787
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For a long time GHC has had some internal mechanism designed to support
a call-site inline directive, thus
inline f xs
makes f be inlined at the call site even if f is big.
However, the surface syntax seems to have gone, and in any case it
can be done more neatly using a RULE.
This commit:
* Removes the InlineCall constructor for Note
and InlinePlease for SimplCont
* Adds a new known-key Id called 'inline', whose definition in
GHC.Base is just the identity function
* Adds a built-in RULE in PrelRules that rewrites (inline f) to
the body of f, if possible
* Adds documentation
NOTE: I have not tested this (aeroplane work). Give it a try!
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This may help with entering non-ASCII characters at the GHCi prompt,
but as usual with Unicode there's no simple solution that just works.
See commentary in InteractiveUI.hs for more details.
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