From: Guillermo J. Rozas <edu/mit/csail/zurich/gjr>
Date: Thu, 20 Aug 1992 04:28:39 +0000 (+0000)
Subject: Fix an allocation bug.
X-Git-Tag: 20090517-FFI~9095
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=6d0530b7db9864d85c1ed2042590465927c858a2;p=mit-scheme.git

Fix an allocation bug.
---

diff --git a/v7/src/microcode/cmpintmd/mips.h b/v7/src/microcode/cmpintmd/mips.h
index b9ff3bb4a..fe6ed202a 100644
--- a/v7/src/microcode/cmpintmd/mips.h
+++ b/v7/src/microcode/cmpintmd/mips.h
@@ -1,6 +1,6 @@
 /* -*-C-*-
 
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/microcode/cmpintmd/mips.h,v 1.12 1992/08/20 01:12:39 jinx Exp $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/microcode/cmpintmd/mips.h,v 1.13 1992/08/20 04:28:39 jinx Exp $
 
 Copyright (c) 1989-1992 Massachusetts Institute of Technology
 
@@ -551,6 +551,13 @@ DEFUN (allocate_closure, (size), long size)
   limit = ((SCHEME_OBJECT *) Registers[REGBLOCK_CLOSURE_LIMIT]);
   space =  ((limit - free_closure) + 3);
 
+  /* Bump up to a multiple of CLOSURE_ENTRY_WORDS.
+     Otherwise clearing by the allocation code may clobber
+     a different word.
+   */
+  size = (CLOSURE_ENTRY_WORDS
+	  * ((size + (CLOSURE_ENTRY_WORDS - 1))
+	     / CLOSURE_ENTRY_WORDS))
   if (size > space)
   {
     long chunk_size;