From: Mike Pall <mike>
Date: Wed, 8 Mar 2017 22:01:47 +0000 (+0100)
Subject: Limit mcode alloc probing, depending on the available pool size.
X-Git-Tag: v2.0.5~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d62459fc3949baca5ee1c1919feb4f4979bb09c6;p=thirdparty%2FLuaJIT.git

Limit mcode alloc probing, depending on the available pool size.

Contributed by Alexey Kopytov.
---

diff --git a/src/lj_mcode.c b/src/lj_mcode.c
index f0cf22ca..bb7cf96b 100644
--- a/src/lj_mcode.c
+++ b/src/lj_mcode.c
@@ -230,7 +230,8 @@ static void *mcode_alloc(jit_State *J, size_t sz)
   /* First try a contiguous area below the last one. */
   uintptr_t hint = J->mcarea ? (uintptr_t)J->mcarea - sz : 0;
   int i;
-  for (i = 0; i < 32; i++) {  /* 32 attempts ought to be enough ... */
+  /* Limit probing iterations, depending on the available pool size. */
+  for (i = 0; i < LJ_TARGET_JUMPRANGE; i++) {
     if (mcode_validptr(hint)) {
       void *p = mcode_alloc_at(J, hint, sz, MCPROT_GEN);