2001-05-21 14:39:23 +08:00
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While the GC should work on MacOS X Server, MacOS X and Darwin, I only tested
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it on MacOS X Server.
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I've added a PPC assembly version of GC_push_regs(), thus the setjmp() hack is
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no longer necessary. Incremental collection is supported via mprotect/signal.
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The current solution isn't really optimal because the signal handler must decode
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the faulting PPC machine instruction in order to find the correct heap address.
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Further, it must poke around in the register state which the kernel saved away
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in some obscure register state structure before it calls the signal handler -
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needless to say the layout of this structure is no where documented.
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Threads and dynamic libraries are not yet supported (adding dynamic library
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support via the low-level dyld API shouldn't be that hard).
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The original MacOS X port was brought to you by Andrew Stone.
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June, 1 2000
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Dietmar Planitzer
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dave.pl@ping.at
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2001-08-18 09:04:43 +08:00
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Note from Andrew Begel:
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One more fix to enable gc.a to link successfully into a shared library for
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MacOS X. You have to add -fno-common to the CFLAGS in the Makefile. MacOSX
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disallows common symbols in anything that eventually finds its way into a
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shared library. (I don't completely understand why, but -fno-common seems to
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work and doesn't mess up the garbage collector's functionality).
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