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Diffstat (limited to 'gc/doc/README.MacOSX')
| -rw-r--r-- | gc/doc/README.MacOSX | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gc/doc/README.MacOSX b/gc/doc/README.MacOSX new file mode 100644 index 0000000..2abf0b4 --- /dev/null +++ b/gc/doc/README.MacOSX @@ -0,0 +1,27 @@ +While the GC should work on MacOS X Server, MacOS X and Darwin, I only tested +it on MacOS X Server. +I've added a PPC assembly version of GC_push_regs(), thus the setjmp() hack is +no longer necessary. Incremental collection is supported via mprotect/signal. +The current solution isn't really optimal because the signal handler must decode +the faulting PPC machine instruction in order to find the correct heap address. +Further, it must poke around in the register state which the kernel saved away +in some obscure register state structure before it calls the signal handler - +needless to say the layout of this structure is no where documented. +Threads and dynamic libraries are not yet supported (adding dynamic library +support via the low-level dyld API shouldn't be that hard). + +The original MacOS X port was brought to you by Andrew Stone. + + +June, 1 2000 + +Dietmar Planitzer +dave.pl@ping.at + +Note from Andrew Begel: + +One more fix to enable gc.a to link successfully into a shared library for +MacOS X. You have to add -fno-common to the CFLAGS in the Makefile. MacOSX +disallows common symbols in anything that eventually finds its way into a +shared library. (I don't completely understand why, but -fno-common seems to +work and doesn't mess up the garbage collector's functionality). |