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 /*

  * Copyright (c) 2002, 2012, 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.

  *

  */

 #ifndef SHARE_VM_INTERPRETER_BYTECODEINTERPRETER_HPP

 #define SHARE_VM_INTERPRETER_BYTECODEINTERPRETER_HPP

 #include "memory/allocation.hpp"

 #include "oops/methodData.hpp"

 #include "oops/method.hpp"

 #include "runtime/basicLock.hpp"

 #include "runtime/frame.hpp"

 #include "runtime/globals.hpp"

 #include "utilities/globalDefinitions.hpp"

 #ifdef TARGET_ARCH_x86

 # include "bytes_x86.hpp"

 #endif

 #ifdef TARGET_ARCH_sparc

 # include "bytes_sparc.hpp"

 #endif

 #ifdef TARGET_ARCH_zero

 # include "bytes_zero.hpp"

 #endif

 #ifdef TARGET_ARCH_arm

 # include "bytes_arm.hpp"

 #endif

 #ifdef TARGET_ARCH_ppc

 # include "bytes_ppc.hpp"

 #endif

 #ifdef CC_INTERP

 // JavaStack Implementation

 #define MORE_STACK(count)  \

     (topOfStack -= ((count) * Interpreter::stackElementWords))

 // CVM definitions find hotspot equivalents...

 union VMJavaVal64 {

     jlong   l;

     jdouble d;

     uint32_t      v[2];

 };

 typedef class BytecodeInterpreter* interpreterState;

 struct call_message {

   class Method* _callee;           // method to call during call_method request

   address _callee_entry_point;     // address to jump to for call_method request

   int _bcp_advance;                // size of the invoke bytecode operation

 };

 struct osr_message {

   address _osr_buf;                 // the osr buffer

   address _osr_entry;               // the entry to the osr method

 };

 struct osr_result {

   nmethod* nm;                      // osr nmethod

   address return_addr;              // osr blob return address

 };

 // Result returned to frame manager

 union frame_manager_message {

   call_message _to_call;            // describes callee

   osr_message _osr;                 // describes the osr

   osr_result _osr_result;           // result of OSR request

 };

 class BytecodeInterpreter : StackObj {

 friend class SharedRuntime;

 friend class AbstractInterpreterGenerator;

 friend class CppInterpreterGenerator;

 friend class InterpreterGenerator;

 friend class InterpreterMacroAssembler;

 friend class frame;

 friend class VMStructs;

 public:

     enum messages {

          no_request = 0,            // unused

          initialize,                // Perform one time interpreter initializations (assumes all switches set)

          // status message to C++ interpreter

          method_entry,              // initial method entry to interpreter

          method_resume,             // frame manager response to return_from_method request (assuming a frame to resume)

          deopt_resume,              // returning from a native call into a deopted frame

          deopt_resume2,             // deopt resume as a result of a PopFrame

          got_monitors,              // frame manager response to more_monitors request

          rethrow_exception,         // unwinding and throwing exception

          // requests to frame manager from C++ interpreter

          call_method,               // request for new frame from interpreter, manager responds with method_entry

          return_from_method,        // request from interpreter to unwind, manager responds with method_continue

          more_monitors,             // need a new monitor

          throwing_exception,        // unwind stack and rethrow

          popping_frame,             // unwind call and retry call

          do_osr,                    // request this invocation be OSR's

          early_return               // early return as commanded by jvmti

     };

 private:

     JavaThread*           _thread;        // the vm's java thread pointer

     address               _bcp;           // instruction pointer

     intptr_t*             _locals;        // local variable pointer

     ConstantPoolCache*    _constants;     // constant pool cache

     Method*               _method;        // method being executed

     DataLayout*           _mdx;           // compiler profiling data for current bytecode

     intptr_t*             _stack;         // expression stack

     messages              _msg;           // frame manager <-> interpreter message

     frame_manager_message _result;        // result to frame manager

     interpreterState      _prev_link;     // previous interpreter state

     oop                   _oop_temp;      // mirror for interpreted native, null otherwise

     intptr_t*             _stack_base;    // base of expression stack

     intptr_t*             _stack_limit;   // limit of expression stack

     BasicObjectLock*      _monitor_base;  // base of monitors on the native stack

 public:

   // Constructor is only used by the initialization step. All other instances are created

   // by the frame manager.

   BytecodeInterpreter(messages msg);

 //

 // Deoptimization support

 //

 static void layout_interpreterState(interpreterState to_fill,

                                     frame* caller,

                                     frame* interpreter_frame,

                                     Method* method,

                                     intptr_t* locals,

                                     intptr_t* stack,

                                     intptr_t* stack_base,

                                     intptr_t* monitor_base,

                                     intptr_t* frame_bottom,

                                     bool top_frame);

 /*

  * Generic 32-bit wide "Java slot" definition. This type occurs

  * in operand stacks, Java locals, object fields, constant pools.

  */

 union VMJavaVal32 {

     jint     i;

     jfloat   f;

     class oopDesc*   r;

     uint32_t raw;

 };

 /*

  * Generic 64-bit Java value definition

  */

 union VMJavaVal64 {

     jlong   l;

     jdouble d;

     uint32_t      v[2];

 };

 /*

  * Generic 32-bit wide "Java slot" definition. This type occurs

  * in Java locals, object fields, constant pools, and

  * operand stacks (as a CVMStackVal32).

  */

 typedef union VMSlotVal32 {

     VMJavaVal32    j;     /* For "Java" values */

     address        a;     /* a return created by jsr or jsr_w */

 } VMSlotVal32;

 /*

  * Generic 32-bit wide stack slot definition.

  */

 union VMStackVal32 {

     VMJavaVal32    j;     /* For "Java" values */

     VMSlotVal32    s;     /* any value from a "slot" or locals[] */

 };

 inline JavaThread* thread() { return _thread; }

 inline address bcp() { return _bcp; }

 inline void set_bcp(address new_bcp) { _bcp = new_bcp; }

 inline intptr_t* locals() { return _locals; }

 inline ConstantPoolCache* constants() { return _constants; }

 inline Method* method() { return _method; }

 inline DataLayout* mdx() { return _mdx; }

 inline void set_mdx(DataLayout *new_mdx) { _mdx = new_mdx; }

 inline messages msg() { return _msg; }

 inline void set_msg(messages new_msg) { _msg = new_msg; }

 inline Method* callee() { return _result._to_call._callee; }

 inline void set_callee(Method* new_callee) { _result._to_call._callee = new_callee; }

 inline void set_callee_entry_point(address entry) { _result._to_call._callee_entry_point = entry; }

 inline void set_osr_buf(address buf) { _result._osr._osr_buf = buf; }

 inline void set_osr_entry(address entry) { _result._osr._osr_entry = entry; }

 inline int bcp_advance() { return _result._to_call._bcp_advance; }

 inline void set_bcp_advance(int count) { _result._to_call._bcp_advance = count; }

 inline interpreterState prev() { return _prev_link; }

 inline intptr_t* stack() { return _stack; }

 inline void set_stack(intptr_t* new_stack) { _stack = new_stack; }

 inline intptr_t* stack_base() { return _stack_base; }

 inline intptr_t* stack_limit() { return _stack_limit; }

 inline BasicObjectLock* monitor_base() { return _monitor_base; }

 /*

  * 64-bit Arithmetic:

  *

  * The functions below follow the semantics of the

  * ladd, land, ldiv, lmul, lor, lxor, and lrem bytecodes,

  * respectively.

  */

 static jlong VMlongAdd(jlong op1, jlong op2);

 static jlong VMlongAnd(jlong op1, jlong op2);

 static jlong VMlongDiv(jlong op1, jlong op2);

 static jlong VMlongMul(jlong op1, jlong op2);

 static jlong VMlongOr (jlong op1, jlong op2);

 static jlong VMlongSub(jlong op1, jlong op2);

 static jlong VMlongXor(jlong op1, jlong op2);

 static jlong VMlongRem(jlong op1, jlong op2);

 /*

  * Shift:

  *

  * The functions below follow the semantics of the

  * lushr, lshl, and lshr bytecodes, respectively.

  */

 static jlong VMlongUshr(jlong op1, jint op2);

 static jlong VMlongShl (jlong op1, jint op2);

 static jlong VMlongShr (jlong op1, jint op2);

 /*

  * Unary:

  *

  * Return the negation of "op" (-op), according to

  * the semantics of the lneg bytecode.

  */

 static jlong VMlongNeg(jlong op);

 /*

  * Return the complement of "op" (~op)

  */

 static jlong VMlongNot(jlong op);

 /*

  * Comparisons to 0:

  */

 static int32_t VMlongLtz(jlong op);     /* op <= 0 */

 static int32_t VMlongGez(jlong op);     /* op >= 0 */

 static int32_t VMlongEqz(jlong op);     /* op == 0 */

 /*

  * Between operands:

  */

 static int32_t VMlongEq(jlong op1, jlong op2);    /* op1 == op2 */

 static int32_t VMlongNe(jlong op1, jlong op2);    /* op1 != op2 */

 static int32_t VMlongGe(jlong op1, jlong op2);    /* op1 >= op2 */

 static int32_t VMlongLe(jlong op1, jlong op2);    /* op1 <= op2 */

 static int32_t VMlongLt(jlong op1, jlong op2);    /* op1 <  op2 */

 static int32_t VMlongGt(jlong op1, jlong op2);    /* op1 >  op2 */

 /*

  * Comparisons (returning an jint value: 0, 1, or -1)

  *

  * Between operands:

  *

  * Compare "op1" and "op2" according to the semantics of the

  * "lcmp" bytecode.

  */

 static int32_t VMlongCompare(jlong op1, jlong op2);

 /*

  * Convert int to long, according to "i2l" bytecode semantics

  */

 static jlong VMint2Long(jint val);

 /*

  * Convert long to int, according to "l2i" bytecode semantics

  */

 static jint VMlong2Int(jlong val);

 /*

  * Convert long to float, according to "l2f" bytecode semantics

  */

 static jfloat VMlong2Float(jlong val);

 /*

  * Convert long to double, according to "l2d" bytecode semantics

  */

 static jdouble VMlong2Double(jlong val);

 /*

  * Java floating-point float value manipulation.

  *

  * The result argument is, once again, an lvalue.

  *

  * Arithmetic:

  *

  * The functions below follow the semantics of the

  * fadd, fsub, fmul, fdiv, and frem bytecodes,

  * respectively.

  */

 static jfloat VMfloatAdd(jfloat op1, jfloat op2);

 static jfloat VMfloatSub(jfloat op1, jfloat op2);

 static jfloat VMfloatMul(jfloat op1, jfloat op2);

 static jfloat VMfloatDiv(jfloat op1, jfloat op2);

 static jfloat VMfloatRem(jfloat op1, jfloat op2);

 /*

  * Unary:

  *

  * Return the negation of "op" (-op), according to

  * the semantics of the fneg bytecode.

  */

 static jfloat VMfloatNeg(jfloat op);

 /*

  * Comparisons (returning an int value: 0, 1, or -1)

  *

  * Between operands:

  *

  * Compare "op1" and "op2" according to the semantics of the

  * "fcmpl" (direction is -1) or "fcmpg" (direction is 1) bytecodes.

  */

 static int32_t VMfloatCompare(jfloat op1, jfloat op2,

                               int32_t direction);

 /*

  * Conversion:

  */

 /*

  * Convert float to double, according to "f2d" bytecode semantics

  */

 static jdouble VMfloat2Double(jfloat op);

 /*

  ******************************************

  * Java double floating-point manipulation.

  ******************************************

  *

  * The result argument is, once again, an lvalue.

  *

  * Conversions:

  */

 /*

  * Convert double to int, according to "d2i" bytecode semantics

  */

 static jint VMdouble2Int(jdouble val);

 /*

  * Convert double to float, according to "d2f" bytecode semantics

  */

 static jfloat VMdouble2Float(jdouble val);

 /*

  * Convert int to double, according to "i2d" bytecode semantics

  */

 static jdouble VMint2Double(jint val);

 /*

  * Arithmetic:

  *

  * The functions below follow the semantics of the

  * dadd, dsub, ddiv, dmul, and drem bytecodes, respectively.

  */

 static jdouble VMdoubleAdd(jdouble op1, jdouble op2);

 static jdouble VMdoubleSub(jdouble op1, jdouble op2);

 static jdouble VMdoubleDiv(jdouble op1, jdouble op2);

 static jdouble VMdoubleMul(jdouble op1, jdouble op2);

 static jdouble VMdoubleRem(jdouble op1, jdouble op2);

 /*

  * Unary:

  *

  * Return the negation of "op" (-op), according to

  * the semantics of the dneg bytecode.

  */

 static jdouble VMdoubleNeg(jdouble op);

 /*

  * Comparisons (returning an int32_t value: 0, 1, or -1)

  *

  * Between operands:

  *

  * Compare "op1" and "op2" according to the semantics of the

  * "dcmpl" (direction is -1) or "dcmpg" (direction is 1) bytecodes.

  */

 static int32_t VMdoubleCompare(jdouble op1, jdouble op2, int32_t direction);

 /*

  * Copy two typeless 32-bit words from one location to another.

  * This is semantically equivalent to:

  *

  * to[0] = from[0];

  * to[1] = from[1];

  *

  * but this interface is provided for those platforms that could

  * optimize this into a single 64-bit transfer.

  */

 static void VMmemCopy64(uint32_t to[2], const uint32_t from[2]);

 // Arithmetic operations

 /*

  * Java arithmetic methods.

  * The functions below follow the semantics of the

  * iadd, isub, imul, idiv, irem, iand, ior, ixor,

  * and ineg bytecodes, respectively.

  */

 static jint VMintAdd(jint op1, jint op2);

 static jint VMintSub(jint op1, jint op2);

 static jint VMintMul(jint op1, jint op2);

 static jint VMintDiv(jint op1, jint op2);

 static jint VMintRem(jint op1, jint op2);

 static jint VMintAnd(jint op1, jint op2);

 static jint VMintOr (jint op1, jint op2);

 static jint VMintXor(jint op1, jint op2);

 /*

  * Shift Operation:

  * The functions below follow the semantics of the

  * iushr, ishl, and ishr bytecodes, respectively.

  */

 static juint VMintUshr(jint op, jint num);

 static jint VMintShl (jint op, jint num);

 static jint VMintShr (jint op, jint num);

 /*

  * Unary Operation:

  *

  * Return the negation of "op" (-op), according to

  * the semantics of the ineg bytecode.

  */

 static jint VMintNeg(jint op);

 /*

  * Int Conversions:

  */

 /*

  * Convert int to float, according to "i2f" bytecode semantics

  */

 static jfloat VMint2Float(jint val);

 /*

  * Convert int to byte, according to "i2b" bytecode semantics

  */

 static jbyte VMint2Byte(jint val);

 /*

  * Convert int to char, according to "i2c" bytecode semantics

  */

 static jchar VMint2Char(jint val);

 /*

  * Convert int to short, according to "i2s" bytecode semantics

  */

 static jshort VMint2Short(jint val);

 /*=========================================================================

  * Bytecode interpreter operations

  *=======================================================================*/

 static void dup(intptr_t *tos);

 static void dup2(intptr_t *tos);

 static void dup_x1(intptr_t *tos);    /* insert top word two down */

 static void dup_x2(intptr_t *tos);    /* insert top word three down  */

 static void dup2_x1(intptr_t *tos);   /* insert top 2 slots three down */

 static void dup2_x2(intptr_t *tos);   /* insert top 2 slots four down */

 static void swap(intptr_t *tos);      /* swap top two elements */

 // umm don't like this method modifies its object

 // The Interpreter used when

 static void run(interpreterState istate);

 // The interpreter used if JVMTI needs interpreter events

 static void runWithChecks(interpreterState istate);

 static void End_Of_Interpreter(void);

 // Inline static functions for Java Stack and Local manipulation

 static address stack_slot(intptr_t *tos, int offset);

 static jint stack_int(intptr_t *tos, int offset);

 static jfloat stack_float(intptr_t *tos, int offset);

 static oop stack_object(intptr_t *tos, int offset);

 static jdouble stack_double(intptr_t *tos, int offset);

 static jlong stack_long(intptr_t *tos, int offset);

 // only used for value types

 static void set_stack_slot(intptr_t *tos, address value, int offset);

 static void set_stack_int(intptr_t *tos, int value, int offset);

 static void set_stack_float(intptr_t *tos, jfloat value, int offset);

 static void set_stack_object(intptr_t *tos, oop value, int offset);

 // needs to be platform dep for the 32 bit platforms.

 static void set_stack_double(intptr_t *tos, jdouble value, int offset);

 static void set_stack_long(intptr_t *tos, jlong value, int offset);

 static void set_stack_double_from_addr(intptr_t *tos, address addr, int offset);

 static void set_stack_long_from_addr(intptr_t *tos, address addr, int offset);

 // Locals

 static address locals_slot(intptr_t* locals, int offset);

 static jint locals_int(intptr_t* locals, int offset);

 static jfloat locals_float(intptr_t* locals, int offset);

 static oop locals_object(intptr_t* locals, int offset);

 static jdouble locals_double(intptr_t* locals, int offset);

 static jlong locals_long(intptr_t* locals, int offset);

 static address locals_long_at(intptr_t* locals, int offset);

 static address locals_double_at(intptr_t* locals, int offset);

 static void set_locals_slot(intptr_t *locals, address value, int offset);

 static void set_locals_int(intptr_t *locals, jint value, int offset);

 static void set_locals_float(intptr_t *locals, jfloat value, int offset);

 static void set_locals_object(intptr_t *locals, oop value, int offset);

 static void set_locals_double(intptr_t *locals, jdouble value, int offset);

 static void set_locals_long(intptr_t *locals, jlong value, int offset);

 static void set_locals_double_from_addr(intptr_t *locals,

                                    address addr, int offset);

 static void set_locals_long_from_addr(intptr_t *locals,

                                    address addr, int offset);

 static void astore(intptr_t* topOfStack, int stack_offset,

                    intptr_t* locals,     int locals_offset);

 // Support for dup and swap

 static void copy_stack_slot(intptr_t *tos, int from_offset, int to_offset);

 #ifndef PRODUCT

 static const char* C_msg(BytecodeInterpreter::messages msg);

 void print();

 #endif // PRODUCT

     // Platform fields/methods

 #ifdef TARGET_ARCH_x86

 # include "bytecodeInterpreter_x86.hpp"

 #endif

 #ifdef TARGET_ARCH_sparc

 # include "bytecodeInterpreter_sparc.hpp"

 #endif

 #ifdef TARGET_ARCH_zero

 # include "bytecodeInterpreter_zero.hpp"

 #endif

 #ifdef TARGET_ARCH_arm

 # include "bytecodeInterpreter_arm.hpp"

 #endif

 #ifdef TARGET_ARCH_ppc

 # include "bytecodeInterpreter_ppc.hpp"

 #endif

 }; // BytecodeInterpreter

 #endif // CC_INTERP

 #endif // SHARE_VM_INTERPRETER_BYTECODEINTERPRETER_HPP