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word-align stack sharing in continuations

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svn: r2563
This commit is contained in:
Robby Findler 2006-03-31 22:36:06 +00:00
parent 05b4ec317d
commit a47001cfc5
1 changed files with 10 additions and 0 deletions
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10
src/mzscheme/src/setjmpup.c
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@ -409,6 +409,12 @@ static long find_same(char *p, char *low, long max_size)
prevent stack overflow. */ prevent stack overflow. */
# define MAX_STACK_DIFF 4096 # define MAX_STACK_DIFF 4096
#ifdef SIXTY_FOUR_BIT_INTEGERS
# define SHARED_STACK_ALIGNMENT 8
#else
# define SHARED_STACK_ALIGNMENT 4
#endif
if (max_size > MAX_STACK_DIFF) { if (max_size > MAX_STACK_DIFF) {
cnt = max_size - MAX_STACK_DIFF; cnt = max_size - MAX_STACK_DIFF;
max_size = MAX_STACK_DIFF; max_size = MAX_STACK_DIFF;
@ -428,6 +434,10 @@ static long find_same(char *p, char *low, long max_size)
} }
} }
if (cnt & (SHARED_STACK_ALIGNMENT - 1)) {
cnt -= (cnt & (SHARED_STACK_ALIGNMENT - 1));
}
return cnt; return cnt;
} }