diff options
| -rw-r--r-- | ChangeLog | 12 | ||||
| -rw-r--r-- | gc.c | 7 |
2 files changed, 18 insertions, 1 deletions
@@ -1,3 +1,15 @@ +Mon Dec 13 18:13:52 2004 Tanaka Akira <akr@m17n.org> + + * gc.c (stack_end_address): new function to obtain stack end address. + stack_end_address calls __builtin_frame_address(0) to obtain the + frame pointer of a stack frame of stack_end_address. The address + is the stack pointer of the caller's stack frame. + (SET_STACK_END): use stack_end_address. + This makes the conservative garbage collector to scan a stack frame + of the garbage_collect function itself. This is required because + callee-save registers may be stored in the frame. + [ruby-dev:25158] + Mon Dec 13 00:58:02 2004 Tanaka Akira <akr@m17n.org> * lib/pathname.rb (cleanpath_aggressive): make it private. @@ -432,7 +432,12 @@ static unsigned int STACK_LEVEL_MAX = 655300; # define STACK_END (&stack_end) #else # if defined(__GNUC__) && defined(USE_BUILTIN_FRAME_ADDRESS) && !defined(__ia64__) -# define SET_STACK_END VALUE *stack_end = __builtin_frame_address(0) +__attribute__ ((noinline)) static VALUE * +stack_end_address(void) +{ + return (VALUE *)__builtin_frame_address(0); +} +# define SET_STACK_END VALUE *stack_end = stack_end_address() # else # define SET_STACK_END VALUE *stack_end = alloca(1) # endif |