Mercurial > hg > truffle
view src/share/vm/shark/sharkCodeBuffer.hpp @ 1744:f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
Summary: Test minimal stack sizes given (also fixed linux compilation error)
Reviewed-by: never, phh, coleenp
author | ptisnovs |
---|---|
date | Thu, 19 Aug 2010 14:23:59 -0400 |
parents | d2ede61b7a12 |
children | f95d63e2154a |
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/* * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved. * Copyright 2009 Red Hat, Inc. * 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. * */ class SharkCodeBuffer : public StackObj { public: SharkCodeBuffer(MacroAssembler* masm) : _masm(masm), _base_pc(NULL) {} private: MacroAssembler* _masm; llvm::Value* _base_pc; private: MacroAssembler* masm() const { return _masm; } public: llvm::Value* base_pc() const { return _base_pc; } void set_base_pc(llvm::Value* base_pc) { assert(_base_pc == NULL, "only do this once"); _base_pc = base_pc; } // Allocate some space in the buffer and return its address. // This buffer will have been relocated by the time the method // is installed, so you can't inline the result in code. public: void* malloc(size_t size) const { masm()->align(BytesPerWord); void *result = masm()->pc(); masm()->advance(size); return result; } // Create a unique offset in the buffer. public: int create_unique_offset() const { int offset = masm()->offset(); masm()->advance(1); return offset; } // Inline an oop into the buffer and return its offset. public: int inline_oop(jobject object) const { masm()->align(BytesPerWord); int offset = masm()->offset(); masm()->store_oop(object); return offset; } // Inline a block of non-oop data into the buffer and return its offset. public: int inline_data(void *src, size_t size) const { masm()->align(BytesPerWord); int offset = masm()->offset(); void *dst = masm()->pc(); masm()->advance(size); memcpy(dst, src, size); return offset; } };