Disable data page (heap) execution when running on Mac OS X 10.7 ("Lion")

build/mac/make_heap_non_executable_from_xcode.sh

Index: build/mac/make_heap_non_executable_from_xcode.sh
===================================================================
--- build/mac/make_heap_non_executable_from_xcode.sh	(revision 0)
+++ build/mac/make_heap_non_executable_from_xcode.sh	(revision 0)
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Copyright (c) 2011 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This is a small wrapper script around make_heap_non_executable.py allowing
+# it to be invoked easily from Xcode. make_heap_non_executable.py expects its
+# argument on the command line, and Xcode puts all of its parameters in the
+# environment.
+
+set -e
+

[TVL, 2011/08/10 16:02:11]

do you want to check the sdk here and warn/error if we're using the 10.7 sdk
since that's probably the safest way to assume we should be using the
xcode_setting support instead?

[Mark Mentovai, 2011/08/10 16:05:04]

TVL wrote:
1. There is no xcode_settings support. The linker default as of Xcode 4.0 (note,
4.0 on 10.6, not 4.1 on 10.7) is to set MH_NO_HEAP_EXECUTION when creating an
i386 executable. Use -allow_heap_execute to DISABLE setting this bit.

2. As mentioned in the script, the linker ONLY does this for i386 executables,
not x86_64 executables. I want to (eventually) set the bit on x86_64 executables
as well to cover a corner case.

+exec "$(dirname "${0}")/make_heap_non_executable.py" \
+     "${BUILT_PRODUCTS_DIR}/${EXECUTABLE_PATH}"
Property changes on: build/mac/make_heap_non_executable_from_xcode.sh
___________________________________________________________________
Added: svn:executable
   + *
Added: svn:eol-style
   + LF