annotate src/share/vm/interpreter/abstractInterpreter.hpp @ 1472:c18cbe5936b8

6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
author trims
date Thu, 27 May 2010 19:08:38 -0700
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duke@0 1 /*
trims@1472 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
twisti@605 25 // This file contains the platform-independent parts
duke@0 26 // of the abstract interpreter and the abstract interpreter generator.
duke@0 27
duke@0 28 // Organization of the interpreter(s). There exists two different interpreters in hotpot
duke@0 29 // an assembly language version (aka template interpreter) and a high level language version
duke@0 30 // (aka c++ interpreter). Th division of labor is as follows:
duke@0 31
duke@0 32 // Template Interpreter C++ Interpreter Functionality
duke@0 33 //
duke@0 34 // templateTable* bytecodeInterpreter* actual interpretation of bytecodes
duke@0 35 //
duke@0 36 // templateInterpreter* cppInterpreter* generation of assembly code that creates
duke@0 37 // and manages interpreter runtime frames.
duke@0 38 // Also code for populating interpreter
duke@0 39 // frames created during deoptimization.
duke@0 40 //
duke@0 41 // For both template and c++ interpreter. There are common files for aspects of the interpreter
duke@0 42 // that are generic to both interpreters. This is the layout:
duke@0 43 //
duke@0 44 // abstractInterpreter.hpp: generic description of the interpreter.
duke@0 45 // interpreter*: generic frame creation and handling.
duke@0 46 //
duke@0 47
duke@0 48 //------------------------------------------------------------------------------------------------------------------------
duke@0 49 // The C++ interface to the bytecode interpreter(s).
duke@0 50
duke@0 51 class AbstractInterpreter: AllStatic {
duke@0 52 friend class VMStructs;
duke@0 53 friend class Interpreter;
duke@0 54 friend class CppInterpreterGenerator;
duke@0 55 public:
duke@0 56 enum MethodKind {
duke@0 57 zerolocals, // method needs locals initialization
duke@0 58 zerolocals_synchronized, // method needs locals initialization & is synchronized
duke@0 59 native, // native method
duke@0 60 native_synchronized, // native method & is synchronized
duke@0 61 empty, // empty method (code: _return)
duke@0 62 accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return)
duke@0 63 abstract, // abstract method (throws an AbstractMethodException)
jrose@710 64 method_handle, // java.dyn.MethodHandles::invoke
duke@0 65 java_lang_math_sin, // implementation of java.lang.Math.sin (x)
duke@0 66 java_lang_math_cos, // implementation of java.lang.Math.cos (x)
duke@0 67 java_lang_math_tan, // implementation of java.lang.Math.tan (x)
duke@0 68 java_lang_math_abs, // implementation of java.lang.Math.abs (x)
duke@0 69 java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x)
duke@0 70 java_lang_math_log, // implementation of java.lang.Math.log (x)
duke@0 71 java_lang_math_log10, // implementation of java.lang.Math.log10 (x)
duke@0 72 number_of_method_entries,
duke@0 73 invalid = -1
duke@0 74 };
duke@0 75
duke@0 76 enum SomeConstants {
duke@0 77 number_of_result_handlers = 10 // number of result handlers for native calls
duke@0 78 };
duke@0 79
duke@0 80 protected:
duke@0 81 static StubQueue* _code; // the interpreter code (codelets)
duke@0 82
duke@0 83 static bool _notice_safepoints; // true if safepoints are activated
duke@0 84
duke@0 85 static address _native_entry_begin; // Region for native entry code
duke@0 86 static address _native_entry_end;
duke@0 87
duke@0 88 // method entry points
duke@0 89 static address _entry_table[number_of_method_entries]; // entry points for a given method
duke@0 90 static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers
duke@0 91 static address _slow_signature_handler; // the native method generic (slow) signature handler
duke@0 92
duke@0 93 static address _rethrow_exception_entry; // rethrows an activation in previous frame
duke@0 94
duke@0 95 friend class AbstractInterpreterGenerator;
duke@0 96 friend class InterpreterGenerator;
duke@0 97 friend class InterpreterMacroAssembler;
duke@0 98
duke@0 99 public:
duke@0 100 // Initialization/debugging
duke@0 101 static void initialize();
duke@0 102 static StubQueue* code() { return _code; }
duke@0 103
duke@0 104
duke@0 105 // Method activation
duke@0 106 static MethodKind method_kind(methodHandle m);
duke@0 107 static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; }
duke@0 108 static address entry_for_method(methodHandle m) { return _entry_table[method_kind(m)]; }
duke@0 109
duke@0 110 static void print_method_kind(MethodKind kind) PRODUCT_RETURN;
duke@0 111
never@1174 112 static bool can_be_compiled(methodHandle m);
never@1174 113
duke@0 114 // Runtime support
duke@0 115
duke@0 116 // length = invoke bytecode length (to advance to next bytecode)
duke@0 117 static address deopt_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; }
duke@0 118 static address return_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; }
duke@0 119
duke@0 120 static address rethrow_exception_entry() { return _rethrow_exception_entry; }
duke@0 121
duke@0 122 // Activation size in words for a method that is just being called.
duke@0 123 // Parameters haven't been pushed so count them too.
duke@0 124 static int size_top_interpreter_activation(methodOop method);
duke@0 125
duke@0 126 // Deoptimization support
cfang@900 127 // Compute the entry address for continuation after
cfang@900 128 static address deopt_continue_after_entry(methodOop method,
cfang@900 129 address bcp,
cfang@900 130 int callee_parameters,
cfang@900 131 bool is_top_frame);
cfang@900 132 // Compute the entry address for reexecution
cfang@900 133 static address deopt_reexecute_entry(methodOop method, address bcp);
cfang@900 134 // Deoptimization should reexecute this bytecode
cfang@900 135 static bool bytecode_should_reexecute(Bytecodes::Code code);
duke@0 136
duke@0 137 // share implementation of size_activation and layout_activation:
duke@0 138 static int size_activation(methodOop method,
duke@0 139 int temps,
duke@0 140 int popframe_args,
duke@0 141 int monitors,
duke@0 142 int callee_params,
duke@0 143 int callee_locals,
duke@0 144 bool is_top_frame);
duke@0 145
duke@0 146 static int layout_activation(methodOop method,
duke@0 147 int temps,
duke@0 148 int popframe_args,
duke@0 149 int monitors,
duke@0 150 int callee_params,
duke@0 151 int callee_locals,
duke@0 152 frame* caller,
duke@0 153 frame* interpreter_frame,
duke@0 154 bool is_top_frame);
duke@0 155
duke@0 156 // Runtime support
duke@0 157 static bool is_not_reached( methodHandle method, int bci);
duke@0 158 // Safepoint support
duke@0 159 static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint
duke@0 160 static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints
duke@0 161
duke@0 162 // Support for native calls
duke@0 163 static address slow_signature_handler() { return _slow_signature_handler; }
duke@0 164 static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; }
duke@0 165 static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table
duke@0 166 static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; }
duke@0 167 // Debugging/printing
duke@0 168 static void print(); // prints the interpreter code
duke@0 169
duke@0 170 public:
twisti@1426 171 // Interpreter helpers
twisti@1426 172 const static int stackElementWords = 1;
twisti@1426 173 const static int stackElementSize = stackElementWords * wordSize;
twisti@1426 174 const static int logStackElementSize = LogBytesPerWord;
duke@0 175
duke@0 176 // Local values relative to locals[n]
duke@0 177 static int local_offset_in_bytes(int n) {
twisti@1426 178 return ((frame::interpreter_frame_expression_stack_direction() * n) * stackElementSize);
duke@0 179 }
duke@0 180
jrose@726 181 // access to stacked values according to type:
jrose@726 182 static oop* oop_addr_in_slot(intptr_t* slot_addr) {
jrose@726 183 return (oop*) slot_addr;
jrose@726 184 }
jrose@726 185 static jint* int_addr_in_slot(intptr_t* slot_addr) {
jrose@726 186 if ((int) sizeof(jint) < wordSize && !Bytes::is_Java_byte_ordering_different())
jrose@726 187 // big-endian LP64
jrose@726 188 return (jint*)(slot_addr + 1) - 1;
jrose@726 189 else
jrose@726 190 return (jint*) slot_addr;
jrose@726 191 }
jrose@726 192 static jlong long_in_slot(intptr_t* slot_addr) {
jrose@726 193 if (sizeof(intptr_t) >= sizeof(jlong)) {
jrose@726 194 return *(jlong*) slot_addr;
twisti@1426 195 } else {
jrose@726 196 return Bytes::get_native_u8((address)slot_addr);
jrose@726 197 }
jrose@726 198 }
jrose@726 199 static void set_long_in_slot(intptr_t* slot_addr, jlong value) {
jrose@726 200 if (sizeof(intptr_t) >= sizeof(jlong)) {
jrose@726 201 *(jlong*) slot_addr = value;
twisti@1426 202 } else {
jrose@726 203 Bytes::put_native_u8((address)slot_addr, value);
jrose@726 204 }
jrose@726 205 }
jrose@726 206 static void get_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
jrose@726 207 switch (type) {
jrose@726 208 case T_BOOLEAN: value->z = *int_addr_in_slot(slot_addr); break;
jrose@726 209 case T_CHAR: value->c = *int_addr_in_slot(slot_addr); break;
jrose@726 210 case T_BYTE: value->b = *int_addr_in_slot(slot_addr); break;
jrose@726 211 case T_SHORT: value->s = *int_addr_in_slot(slot_addr); break;
jrose@726 212 case T_INT: value->i = *int_addr_in_slot(slot_addr); break;
jrose@726 213 case T_LONG: value->j = long_in_slot(slot_addr); break;
jrose@726 214 case T_FLOAT: value->f = *(jfloat*)int_addr_in_slot(slot_addr); break;
jrose@726 215 case T_DOUBLE: value->d = jdouble_cast(long_in_slot(slot_addr)); break;
jrose@726 216 case T_OBJECT: value->l = (jobject)*oop_addr_in_slot(slot_addr); break;
jrose@726 217 default: ShouldNotReachHere();
jrose@726 218 }
jrose@726 219 }
jrose@726 220 static void set_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
jrose@726 221 switch (type) {
jrose@726 222 case T_BOOLEAN: *int_addr_in_slot(slot_addr) = (value->z != 0); break;
jrose@726 223 case T_CHAR: *int_addr_in_slot(slot_addr) = value->c; break;
jrose@726 224 case T_BYTE: *int_addr_in_slot(slot_addr) = value->b; break;
jrose@726 225 case T_SHORT: *int_addr_in_slot(slot_addr) = value->s; break;
jrose@726 226 case T_INT: *int_addr_in_slot(slot_addr) = value->i; break;
jrose@726 227 case T_LONG: set_long_in_slot(slot_addr, value->j); break;
jrose@726 228 case T_FLOAT: *(jfloat*)int_addr_in_slot(slot_addr) = value->f; break;
jrose@726 229 case T_DOUBLE: set_long_in_slot(slot_addr, jlong_cast(value->d)); break;
jrose@726 230 case T_OBJECT: *oop_addr_in_slot(slot_addr) = (oop) value->l; break;
jrose@726 231 default: ShouldNotReachHere();
jrose@726 232 }
jrose@726 233 }
duke@0 234 };
duke@0 235
duke@0 236 //------------------------------------------------------------------------------------------------------------------------
duke@0 237 // The interpreter generator.
duke@0 238
duke@0 239 class Template;
duke@0 240 class AbstractInterpreterGenerator: public StackObj {
duke@0 241 protected:
duke@0 242 InterpreterMacroAssembler* _masm;
duke@0 243
duke@0 244 // shared code sequences
duke@0 245 // Converter for native abi result to tosca result
duke@0 246 address generate_result_handler_for(BasicType type);
duke@0 247 address generate_slow_signature_handler();
duke@0 248
duke@0 249 // entry point generator
duke@0 250 address generate_method_entry(AbstractInterpreter::MethodKind kind);
duke@0 251
duke@0 252 void bang_stack_shadow_pages(bool native_call);
duke@0 253
duke@0 254 void generate_all();
duke@0 255
duke@0 256 public:
duke@0 257 AbstractInterpreterGenerator(StubQueue* _code);
duke@0 258 };