Mercurial > hg > truffle
view src/share/vm/memory/permGen.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
author | johnc |
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date | Wed, 18 Aug 2010 10:59:06 -0700 |
parents | c18cbe5936b8 |
children | e41cd7fd68a6 |
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/* * Copyright (c) 2000, 2008, 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. * */ // All heaps contains a "permanent generation," containing permanent // (reflective) objects. This is like a regular generation in some ways, // but unlike one in others, and so is split apart. class Generation; class GenRemSet; class CSpaceCounters; // PermGen models the part of the heap class PermGen : public CHeapObj { friend class VMStructs; protected: size_t _capacity_expansion_limit; // maximum expansion allowed without a // full gc occurring HeapWord* mem_allocate_in_gen(size_t size, Generation* gen); public: enum Name { MarkSweepCompact, MarkSweep, ConcurrentMarkSweep }; // Permanent allocation (initialized) virtual HeapWord* mem_allocate(size_t size) = 0; // Mark sweep support virtual void compute_new_size() = 0; // Ideally, we would use MI (IMHO) but we'll do delegation instead. virtual Generation* as_gen() const = 0; virtual void oop_iterate(OopClosure* cl) { Generation* g = as_gen(); assert(g != NULL, "as_gen() NULL"); g->oop_iterate(cl); } virtual void object_iterate(ObjectClosure* cl) { Generation* g = as_gen(); assert(g != NULL, "as_gen() NULL"); g->object_iterate(cl); } // Performance Counter support virtual void update_counters() { Generation* g = as_gen(); assert(g != NULL, "as_gen() NULL"); g->update_counters(); } };