1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/shark/sharkInvariants.hpp Wed Aug 11 05:51:21 2010 -0700
1.3 @@ -0,0 +1,167 @@
1.4 +/*
1.5 + * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
1.6 + * Copyright 2008, 2009 Red Hat, Inc.
1.7 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.8 + *
1.9 + * This code is free software; you can redistribute it and/or modify it
1.10 + * under the terms of the GNU General Public License version 2 only, as
1.11 + * published by the Free Software Foundation.
1.12 + *
1.13 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.14 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.15 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.16 + * version 2 for more details (a copy is included in the LICENSE file that
1.17 + * accompanied this code).
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License version
1.20 + * 2 along with this work; if not, write to the Free Software Foundation,
1.21 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.22 + *
1.23 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.24 + * or visit www.oracle.com if you need additional information or have any
1.25 + * questions.
1.26 + *
1.27 + */
1.28 +
1.29 +// Base classes used to track various values through the compilation.
1.30 +// SharkCompileInvariants is used to track values which remain the
1.31 +// same for the top-level method and any inlined methods it may have
1.32 +// (ie for the whole compilation). SharkTargetInvariants is used to
1.33 +// track values which differ between methods.
1.34 +
1.35 +class SharkCompileInvariants : public ResourceObj {
1.36 + protected:
1.37 + SharkCompileInvariants(ciEnv* env, SharkBuilder* builder)
1.38 + : _env(env),
1.39 + _builder(builder),
1.40 + _thread(NULL) {}
1.41 +
1.42 + SharkCompileInvariants(const SharkCompileInvariants* parent)
1.43 + : _env(parent->_env),
1.44 + _builder(parent->_builder),
1.45 + _thread(parent->_thread) {}
1.46 +
1.47 + private:
1.48 + ciEnv* _env;
1.49 + SharkBuilder* _builder;
1.50 + llvm::Value* _thread;
1.51 +
1.52 + // Top-level broker for HotSpot's Compiler Interface.
1.53 + //
1.54 + // Its main purpose is to allow the various CI classes to access
1.55 + // oops in the VM without having to worry about safepointing. In
1.56 + // addition to this it acts as a holder for various recorders and
1.57 + // memory allocators.
1.58 + //
1.59 + // Accessing this directly is kind of ugly, so it's private. Add
1.60 + // new accessors below if you need something from it.
1.61 + private:
1.62 + ciEnv* env() const {
1.63 + assert(_env != NULL, "env not available");
1.64 + return _env;
1.65 + }
1.66 +
1.67 + // The SharkBuilder that is used to build LLVM IR.
1.68 + protected:
1.69 + SharkBuilder* builder() const {
1.70 + return _builder;
1.71 + }
1.72 +
1.73 + // Pointer to this thread's JavaThread object. This is not
1.74 + // available until a short way into SharkFunction creation
1.75 + // so a setter is required. Assertions are used to enforce
1.76 + // invariance.
1.77 + protected:
1.78 + llvm::Value* thread() const {
1.79 + assert(_thread != NULL, "thread not available");
1.80 + return _thread;
1.81 + }
1.82 + void set_thread(llvm::Value* thread) {
1.83 + assert(_thread == NULL, "thread already set");
1.84 + _thread = thread;
1.85 + }
1.86 +
1.87 + // Objects that handle various aspects of the compilation.
1.88 + protected:
1.89 + DebugInformationRecorder* debug_info() const {
1.90 + return env()->debug_info();
1.91 + }
1.92 + Dependencies* dependencies() const {
1.93 + return env()->dependencies();
1.94 + }
1.95 + SharkCodeBuffer* code_buffer() const {
1.96 + return builder()->code_buffer();
1.97 + }
1.98 +
1.99 + // Commonly used classes
1.100 + protected:
1.101 + ciInstanceKlass* java_lang_Object_klass() const {
1.102 + return env()->Object_klass();
1.103 + }
1.104 + ciInstanceKlass* java_lang_Throwable_klass() const {
1.105 + return env()->Throwable_klass();
1.106 + }
1.107 +};
1.108 +
1.109 +class SharkTargetInvariants : public SharkCompileInvariants {
1.110 + protected:
1.111 + SharkTargetInvariants(ciEnv* env, SharkBuilder* builder, ciTypeFlow* flow)
1.112 + : SharkCompileInvariants(env, builder),
1.113 + _target(flow->method()),
1.114 + _flow(flow),
1.115 + _max_monitors(count_monitors()) {}
1.116 +
1.117 + SharkTargetInvariants(const SharkCompileInvariants* parent, ciMethod* target)
1.118 + : SharkCompileInvariants(parent),
1.119 + _target(target),
1.120 + _flow(NULL),
1.121 + _max_monitors(count_monitors()) {}
1.122 +
1.123 + SharkTargetInvariants(const SharkTargetInvariants* parent)
1.124 + : SharkCompileInvariants(parent),
1.125 + _target(parent->_target),
1.126 + _flow(parent->_flow),
1.127 + _max_monitors(parent->_max_monitors) {}
1.128 +
1.129 + private:
1.130 + int count_monitors();
1.131 +
1.132 + private:
1.133 + ciMethod* _target;
1.134 + ciTypeFlow* _flow;
1.135 + int _max_monitors;
1.136 +
1.137 + // The method being compiled.
1.138 + protected:
1.139 + ciMethod* target() const {
1.140 + return _target;
1.141 + }
1.142 +
1.143 + // Typeflow analysis of the method being compiled.
1.144 + protected:
1.145 + ciTypeFlow* flow() const {
1.146 + assert(_flow != NULL, "typeflow not available");
1.147 + return _flow;
1.148 + }
1.149 +
1.150 + // Properties of the method.
1.151 + protected:
1.152 + int max_locals() const {
1.153 + return target()->max_locals();
1.154 + }
1.155 + int max_stack() const {
1.156 + return target()->max_stack();
1.157 + }
1.158 + int max_monitors() const {
1.159 + return _max_monitors;
1.160 + }
1.161 + int arg_size() const {
1.162 + return target()->arg_size();
1.163 + }
1.164 + bool is_static() const {
1.165 + return target()->is_static();
1.166 + }
1.167 + bool is_synchronized() const {
1.168 + return target()->is_synchronized();
1.169 + }
1.170 +};
