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foreign import ccall unsafe hs_hpc_write :: CString -> IO ()
foreign import ccall unsafe hs_hpc_read :: CString -> IO ()
These write a Hpc description of the state of the world to a file,
or read a description into the current Hpc tickbox subsystem.
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When -fbreak-on-exception is set, an exception will cause GHCi to
suspend the current computation and return to the prompt, where the
history of the current evaluation can be inspected (if we are in
:trace). This isn't on by default, because the behaviour could be
confusing: for example, ^C will cause a breakpoint. It can be very
useful for finding the cause of a "head []" or a "fromJust Nothing",
though.
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- .tix files are now a list of MixModule, which contain a hash of the contents of the .mix file.
- .mix files now have (the same) hash number.
This changes allow different binaries that use the same module compiled in the same way
to share coverage information.
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HANDLE is defined to be (void *) anyway, so this shouldn't hurt
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- Added HPCRIX support for passing tracer filename.
- Added thread tracing support.
- Cleaned up use of HsFFI.h
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Fixes #637.
The implications of this change are:
- threadDelay on Windows no longer creates a new OS thread each time,
instead it communicates with the IO manager thread in the same way as
on Unix.
- deadlock detection now works the same way on Windows as on Unix; that
is the timer interrupt wakes up the IO manager thread, which causes
the scheduler to check for deadlock.
- Console events now get sent to the IO manager thread, in the same way as
signals do on Unix. This means that console events should behave more
reliably with -threaded on Windows.
All this applies only with -threaded. Without -threaded, the old
ConsoleEvent code is still used.
After some testing, this could be pushed to the 6.6 branch.
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In preparation for parallel GC, split up the monolithic GC.c file into
smaller parts. Also in this patch (and difficult to separate,
unfortunatley):
- Don't include Stable.h in Rts.h, instead just include it where
necessary.
- consistently use STATIC_INLINE in source files, and INLINE_HEADER
in header files. STATIC_INLINE is now turned off when DEBUG is on,
to make debugging easier.
- The GC no longer takes the get_roots function as an argument.
We weren't making use of this generalisation.
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I don't think this can ever be useful, because to add more roots you
need to do it consistently for every GC. The right way to add roots
is to use newStablePtr.
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Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.
The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level. The build system now makes no
pretense at being multi-project, it is just the GHC build system.
No doubt this will break many things, and there will be a period of
instability while we fix the dependencies. A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.
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