Mercurial > hg > graal-compiler
view src/share/vm/ci/ciBaseObject.cpp @ 8710:9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
Summary: Detect the execstack attribute of the loaded library and attempt to fix the stack guard using Safepoint op.
Reviewed-by: dholmes, zgu
Contributed-by: ioi.lam@oracle.com
author | iklam |
---|---|
date | Tue, 05 Mar 2013 13:55:56 -0800 |
parents | da91efe96a93 |
children |
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/* * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "ci/ciBaseObject.hpp" #include "ci/ciUtilities.hpp" #include "gc_interface/collectedHeap.inline.hpp" #include "oops/oop.inline2.hpp" // ------------------------------------------------------------------ // ciBaseObject::set_ident // // Set the unique identity number of a ciBaseObject. void ciBaseObject::set_ident(uint id) { assert((_ident >> FLAG_BITS) == 0, "must only initialize once"); assert( id < ((uint)1 << (BitsPerInt-FLAG_BITS)), "id too big"); _ident = _ident + (id << FLAG_BITS); } // ------------------------------------------------------------------ // ciBaseObject::ident // // Report the unique identity number of a ciBaseObject. uint ciBaseObject::ident() { uint id = _ident >> FLAG_BITS; assert(id != 0, "must be initialized"); return id; }