abstractInterpreter.hpp revision 9934:fd5d53ecf040
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See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#ifndef SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP 26#define SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP 27 28#include "asm/macroAssembler.hpp" 29#include "code/stubs.hpp" 30#include "interpreter/bytecodes.hpp" 31#include "runtime/thread.inline.hpp" 32#include "runtime/vmThread.hpp" 33#include "utilities/top.hpp" 34 35// This file contains the platform-independent parts 36// of the abstract interpreter and the abstract interpreter generator. 37 38// Organization of the interpreter(s). There exists two different interpreters in hotpot 39// an assembly language version (aka template interpreter) and a high level language version 40// (aka c++ interpreter). Th division of labor is as follows: 41 42// Template Interpreter C++ Interpreter Functionality 43// 44// templateTable* bytecodeInterpreter* actual interpretation of bytecodes 45// 46// templateInterpreter* cppInterpreter* generation of assembly code that creates 47// and manages interpreter runtime frames. 48// Also code for populating interpreter 49// frames created during deoptimization. 50// 51 52class InterpreterMacroAssembler; 53 54class AbstractInterpreter: AllStatic { 55 friend class VMStructs; 56 friend class CppInterpreterGenerator; 57 friend class TemplateInterpreterGenerator; 58 public: 59 enum MethodKind { 60 zerolocals, // method needs locals initialization 61 zerolocals_synchronized, // method needs locals initialization & is synchronized 62 native, // native method 63 native_synchronized, // native method & is synchronized 64 empty, // empty method (code: _return) 65 accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return) 66 abstract, // abstract method (throws an AbstractMethodException) 67 method_handle_invoke_FIRST, // java.lang.invoke.MethodHandles::invokeExact, etc. 68 method_handle_invoke_LAST = (method_handle_invoke_FIRST 69 + (vmIntrinsics::LAST_MH_SIG_POLY 70 - vmIntrinsics::FIRST_MH_SIG_POLY)), 71 java_lang_math_sin, // implementation of java.lang.Math.sin (x) 72 java_lang_math_cos, // implementation of java.lang.Math.cos (x) 73 java_lang_math_tan, // implementation of java.lang.Math.tan (x) 74 java_lang_math_abs, // implementation of java.lang.Math.abs (x) 75 java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x) 76 java_lang_math_log, // implementation of java.lang.Math.log (x) 77 java_lang_math_log10, // implementation of java.lang.Math.log10 (x) 78 java_lang_math_pow, // implementation of java.lang.Math.pow (x,y) 79 java_lang_math_exp, // implementation of java.lang.Math.exp (x) 80 java_lang_ref_reference_get, // implementation of java.lang.ref.Reference.get() 81 java_util_zip_CRC32_update, // implementation of java.util.zip.CRC32.update() 82 java_util_zip_CRC32_updateBytes, // implementation of java.util.zip.CRC32.updateBytes() 83 java_util_zip_CRC32_updateByteBuffer, // implementation of java.util.zip.CRC32.updateByteBuffer() 84 java_util_zip_CRC32C_updateBytes, // implementation of java.util.zip.CRC32C.updateBytes(crc, b[], off, end) 85 java_util_zip_CRC32C_updateDirectByteBuffer, // implementation of java.util.zip.CRC32C.updateDirectByteBuffer(crc, address, off, end) 86 java_lang_Float_intBitsToFloat, // implementation of java.lang.Float.intBitsToFloat() 87 java_lang_Float_floatToRawIntBits, // implementation of java.lang.Float.floatToRawIntBits() 88 java_lang_Double_longBitsToDouble, // implementation of java.lang.Double.longBitsToDouble() 89 java_lang_Double_doubleToRawLongBits, // implementation of java.lang.Double.doubleToRawLongBits() 90 number_of_method_entries, 91 invalid = -1 92 }; 93 94 // Conversion from the part of the above enum to vmIntrinsics::_invokeExact, etc. 95 static vmIntrinsics::ID method_handle_intrinsic(MethodKind kind) { 96 if (kind >= method_handle_invoke_FIRST && kind <= method_handle_invoke_LAST) 97 return (vmIntrinsics::ID)( vmIntrinsics::FIRST_MH_SIG_POLY + (kind - method_handle_invoke_FIRST) ); 98 else 99 return vmIntrinsics::_none; 100 } 101 102 enum SomeConstants { 103 number_of_result_handlers = 10 // number of result handlers for native calls 104 }; 105 106 protected: 107 static StubQueue* _code; // the interpreter code (codelets) 108 109 static bool _notice_safepoints; // true if safepoints are activated 110 111 static address _native_entry_begin; // Region for native entry code 112 static address _native_entry_end; 113 114 // method entry points 115 static address _entry_table[number_of_method_entries]; // entry points for a given method 116 static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers 117 static address _slow_signature_handler; // the native method generic (slow) signature handler 118 119 static address _rethrow_exception_entry; // rethrows an activation in previous frame 120 121 friend class AbstractInterpreterGenerator; 122 friend class InterpreterMacroAssembler; 123 124 public: 125 // Initialization/debugging 126 static void initialize(); 127 static StubQueue* code() { return _code; } 128 129 130 // Method activation 131 static MethodKind method_kind(methodHandle m); 132 static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; } 133 static address entry_for_method(methodHandle m) { return entry_for_kind(method_kind(m)); } 134 135 // used for bootstrapping method handles: 136 static void set_entry_for_kind(MethodKind k, address e); 137 138 static void print_method_kind(MethodKind kind) PRODUCT_RETURN; 139 140 static bool can_be_compiled(methodHandle m); 141 142 // Runtime support 143 144 // length = invoke bytecode length (to advance to next bytecode) 145 static address deopt_entry(TosState state, int length) { ShouldNotReachHere(); return NULL; } 146 static address return_entry(TosState state, int length, Bytecodes::Code code) { ShouldNotReachHere(); return NULL; } 147 148 static address rethrow_exception_entry() { return _rethrow_exception_entry; } 149 150 // Activation size in words for a method that is just being called. 151 // Parameters haven't been pushed so count them too. 152 static int size_top_interpreter_activation(Method* method); 153 154 // Deoptimization support 155 // Compute the entry address for continuation after 156 static address deopt_continue_after_entry(Method* method, 157 address bcp, 158 int callee_parameters, 159 bool is_top_frame); 160 // Compute the entry address for reexecution 161 static address deopt_reexecute_entry(Method* method, address bcp); 162 // Deoptimization should reexecute this bytecode 163 static bool bytecode_should_reexecute(Bytecodes::Code code); 164 165 // deoptimization support 166 static int size_activation(int max_stack, 167 int temps, 168 int extra_args, 169 int monitors, 170 int callee_params, 171 int callee_locals, 172 bool is_top_frame); 173 174 static void layout_activation(Method* method, 175 int temps, 176 int popframe_args, 177 int monitors, 178 int caller_actual_parameters, 179 int callee_params, 180 int callee_locals, 181 frame* caller, 182 frame* interpreter_frame, 183 bool is_top_frame, 184 bool is_bottom_frame); 185 186 // Runtime support 187 static bool is_not_reached(const methodHandle& method, int bci); 188 // Safepoint support 189 static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint 190 static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints 191 192 // Support for native calls 193 static address slow_signature_handler() { return _slow_signature_handler; } 194 static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; } 195 static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table 196 static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; } 197 // Debugging/printing 198 static void print(); // prints the interpreter code 199 200 public: 201 // Interpreter helpers 202 const static int stackElementWords = 1; 203 const static int stackElementSize = stackElementWords * wordSize; 204 const static int logStackElementSize = LogBytesPerWord; 205 206 static int expr_index_at(int i) { 207 return stackElementWords * i; 208 } 209 210 static int expr_offset_in_bytes(int i) { 211#if !defined(ZERO) && (defined(PPC) || defined(SPARC)) 212 return stackElementSize * i + wordSize; // both point to one word past TOS 213#else 214 return stackElementSize * i; 215#endif 216 } 217 218 static int local_index_at(int i) { 219 assert(i <= 0, "local direction already negated"); 220 return stackElementWords * i; 221 } 222 223#if !defined(ZERO) && (defined(IA32) || defined(AMD64)) 224 static Address::ScaleFactor stackElementScale() { 225 return NOT_LP64(Address::times_4) LP64_ONLY(Address::times_8); 226 } 227#endif 228 229 // Local values relative to locals[n] 230 static int local_offset_in_bytes(int n) { 231 return ((frame::interpreter_frame_expression_stack_direction() * n) * stackElementSize); 232 } 233 234 // access to stacked values according to type: 235 static oop* oop_addr_in_slot(intptr_t* slot_addr) { 236 return (oop*) slot_addr; 237 } 238 static jint* int_addr_in_slot(intptr_t* slot_addr) { 239 if ((int) sizeof(jint) < wordSize && !Bytes::is_Java_byte_ordering_different()) 240 // big-endian LP64 241 return (jint*)(slot_addr + 1) - 1; 242 else 243 return (jint*) slot_addr; 244 } 245 static jlong long_in_slot(intptr_t* slot_addr) { 246 if (sizeof(intptr_t) >= sizeof(jlong)) { 247 return *(jlong*) slot_addr; 248 } else { 249 return Bytes::get_native_u8((address)slot_addr); 250 } 251 } 252 static void set_long_in_slot(intptr_t* slot_addr, jlong value) { 253 if (sizeof(intptr_t) >= sizeof(jlong)) { 254 *(jlong*) slot_addr = value; 255 } else { 256 Bytes::put_native_u8((address)slot_addr, value); 257 } 258 } 259 static void get_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) { 260 switch (type) { 261 case T_BOOLEAN: value->z = *int_addr_in_slot(slot_addr); break; 262 case T_CHAR: value->c = *int_addr_in_slot(slot_addr); break; 263 case T_BYTE: value->b = *int_addr_in_slot(slot_addr); break; 264 case T_SHORT: value->s = *int_addr_in_slot(slot_addr); break; 265 case T_INT: value->i = *int_addr_in_slot(slot_addr); break; 266 case T_LONG: value->j = long_in_slot(slot_addr); break; 267 case T_FLOAT: value->f = *(jfloat*)int_addr_in_slot(slot_addr); break; 268 case T_DOUBLE: value->d = jdouble_cast(long_in_slot(slot_addr)); break; 269 case T_OBJECT: value->l = (jobject)*oop_addr_in_slot(slot_addr); break; 270 default: ShouldNotReachHere(); 271 } 272 } 273 static void set_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) { 274 switch (type) { 275 case T_BOOLEAN: *int_addr_in_slot(slot_addr) = (value->z != 0); break; 276 case T_CHAR: *int_addr_in_slot(slot_addr) = value->c; break; 277 case T_BYTE: *int_addr_in_slot(slot_addr) = value->b; break; 278 case T_SHORT: *int_addr_in_slot(slot_addr) = value->s; break; 279 case T_INT: *int_addr_in_slot(slot_addr) = value->i; break; 280 case T_LONG: set_long_in_slot(slot_addr, value->j); break; 281 case T_FLOAT: *(jfloat*)int_addr_in_slot(slot_addr) = value->f; break; 282 case T_DOUBLE: set_long_in_slot(slot_addr, jlong_cast(value->d)); break; 283 case T_OBJECT: *oop_addr_in_slot(slot_addr) = (oop) value->l; break; 284 default: ShouldNotReachHere(); 285 } 286 } 287 288 static void initialize_method_handle_entries(); 289 290 // PPC-only: Support abs and sqrt like in compiler. 291 // For others we can use a normal (native) entry. 292 static bool math_entry_available(MethodKind kind); 293}; 294 295//------------------------------------------------------------------------------------------------------------------------ 296// The interpreter generator. 297 298class Template; 299class AbstractInterpreterGenerator: public StackObj { 300 protected: 301 InterpreterMacroAssembler* _masm; 302 303 public: 304 AbstractInterpreterGenerator(StubQueue* _code); 305}; 306 307#endif // SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP 308