From 293534986f336e9f65ba9d8f9f66fcd86607eca7 Mon Sep 17 00:00:00 2001 From: akr Date: Mon, 13 Dec 2004 09:58:12 +0000 Subject: * 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] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@7546 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- gc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'gc.c') diff --git a/gc.c b/gc.c index b00c170927..62592860d6 100644 --- a/gc.c +++ b/gc.c @@ -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 -- cgit v1.2.3