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author | Mike Pall <mike> | 2017-03-08 22:59:44 +0100 |
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committer | Mike Pall <mike> | 2017-03-08 22:59:44 +0100 |
commit | 4e308361bf730ef3d288db5b71489ecf442f738c (patch) | |
tree | 2578459d15eaa93433303cd4e6b9b62ab845edba | |
parent | ff648369aa1f028750afa517ac095577ed8278d1 (diff) | |
download | luajit2-4e308361bf730ef3d288db5b71489ecf442f738c.tar.gz |
Fix overly restrictive range calculation in mcode allocation.
Contributed by Alexey Kopytov.
-rw-r--r-- | src/lj_mcode.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/lj_mcode.c b/src/lj_mcode.c index b363136d..f0cf22ca 100644 --- a/src/lj_mcode.c +++ b/src/lj_mcode.c @@ -239,11 +239,11 @@ static void *mcode_alloc(jit_State *J, size_t sz) return p; 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 { - hint = (0x78fb ^ LJ_PRNG_BITS(J, 15)) << 16; /* 64K aligned. */ - } while (!(hint + sz < range)); - hint = target + hint - (range>>1); + hint = LJ_PRNG_BITS(J, LJ_TARGET_JUMPRANGE-16) << 16; + } while (!(hint + sz < range+range)); + hint = target + hint - range; } lj_trace_err(J, LJ_TRERR_MCODEAL); /* Give up. OS probably ignores hints? */ return NULL; |