JDK14/Java14源码在线阅读
/*
* Copyright (c) 2002, 2019, 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_INTERPRETER_BYTECODEINTERPRETER_HPP
#define SHARE_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"
#include "utilities/macros.hpp"
#ifdef CC_INTERP
// JavaStack Implementation
#define MORE_STACK(count) \
(topOfStack -= ((count) * Interpreter::stackElementWords))
// CVM definitions find hotspot equivalents...
class InterpreterMacroAssembler;
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 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
oop _mirror; // mirror to klass containing method
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);
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