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Fix overly restrictive range calculation in mcode allocation.

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Contributed by Alexey Kopytov.
This commit is contained in:
Mike Pall 2017-03-08 22:59:44 +01:00
parent ff648369aa
commit 4e308361bf
1 changed files with 4 additions and 4 deletions
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8
src/lj_mcode.c
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@ -239,11 +239,11 @@ static void *mcode_alloc(jit_State *J, size_t sz)
return p; return p;
if (p) mcode_free(J, p, sz); /* Free badly placed area. */ if (p) mcode_free(J, p, sz); /* Free badly placed area. */
} }
/* Next try probing pseudo-random addresses. */ /* Next try probing 64K-aligned pseudo-random addresses. */
do { do {
hint = (0x78fb ^ LJ_PRNG_BITS(J, 15)) << 16; /* 64K aligned. */ hint = LJ_PRNG_BITS(J, LJ_TARGET_JUMPRANGE-16) << 16;
} while (!(hint + sz < range)); } while (!(hint + sz < range+range));
hint = target + hint - (range>>1); hint = target + hint - range;
} }
lj_trace_err(J, LJ_TRERR_MCODEAL); /* Give up. OS probably ignores hints? */ lj_trace_err(J, LJ_TRERR_MCODEAL); /* Give up. OS probably ignores hints? */
return NULL; return NULL;