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Last change
on this file since 3740 was 2, checked in by bird, 23 years ago |
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Initial revision
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Property cvs2svn:cvs-rev
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1.1
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Property svn:eol-style
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native
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File size:
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| 1 | While the GC should work on MacOS X Server, MacOS X and Darwin, I only tested
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| 2 | it on MacOS X Server.
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| 3 | I've added a PPC assembly version of GC_push_regs(), thus the setjmp() hack is
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| 4 | no longer necessary. Incremental collection is supported via mprotect/signal.
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| 5 | The current solution isn't really optimal because the signal handler must decode
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| 6 | the faulting PPC machine instruction in order to find the correct heap address.
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| 7 | Further, it must poke around in the register state which the kernel saved away
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| 8 | in some obscure register state structure before it calls the signal handler -
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| 9 | needless to say the layout of this structure is no where documented.
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| 10 | Threads and dynamic libraries are not yet supported (adding dynamic library
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| 11 | support via the low-level dyld API shouldn't be that hard).
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| 12 |
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| 13 | The original MacOS X port was brought to you by Andrew Stone.
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| 14 |
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| 15 |
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| 16 | June, 1 2000
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| 17 |
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| 18 | Dietmar Planitzer
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| 19 | dave.pl@ping.at
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| 20 |
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| 21 | Note from Andrew Begel:
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| 22 |
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| 23 | One more fix to enable gc.a to link successfully into a shared library for
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| 24 | MacOS X. You have to add -fno-common to the CFLAGS in the Makefile. MacOSX
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| 25 | disallows common symbols in anything that eventually finds its way into a
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| 26 | shared library. (I don't completely understand why, but -fno-common seems to
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| 27 | work and doesn't mess up the garbage collector's functionality).
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