1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/runtime/javaCalls.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,220 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_RUNTIME_JAVACALLS_HPP
1.29 +#define SHARE_VM_RUNTIME_JAVACALLS_HPP
1.30 +
1.31 +#include "memory/allocation.hpp"
1.32 +#include "oops/method.hpp"
1.33 +#include "runtime/handles.hpp"
1.34 +#include "runtime/javaFrameAnchor.hpp"
1.35 +#include "runtime/thread.inline.hpp"
1.36 +#include "runtime/vmThread.hpp"
1.37 +#ifdef TARGET_ARCH_x86
1.38 +# include "jniTypes_x86.hpp"
1.39 +#endif
1.40 +#ifdef TARGET_ARCH_sparc
1.41 +# include "jniTypes_sparc.hpp"
1.42 +#endif
1.43 +#ifdef TARGET_ARCH_zero
1.44 +# include "jniTypes_zero.hpp"
1.45 +#endif
1.46 +#ifdef TARGET_ARCH_arm
1.47 +# include "jniTypes_arm.hpp"
1.48 +#endif
1.49 +#ifdef TARGET_ARCH_ppc
1.50 +# include "jniTypes_ppc.hpp"
1.51 +#endif
1.52 +
1.53 +// A JavaCallWrapper is constructed before each JavaCall and destructed after the call.
1.54 +// Its purpose is to allocate/deallocate a new handle block and to save/restore the last
1.55 +// Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.
1.56 +
1.57 +class JavaCallWrapper: StackObj {
1.58 + friend class VMStructs;
1.59 + private:
1.60 + JavaThread* _thread; // the thread to which this call belongs
1.61 + JNIHandleBlock* _handles; // the saved handle block
1.62 + Method* _callee_method; // to be able to collect arguments if entry frame is top frame
1.63 + oop _receiver; // the receiver of the call (if a non-static call)
1.64 +
1.65 + JavaFrameAnchor _anchor; // last thread anchor state that we must restore
1.66 +
1.67 + JavaValue* _result; // result value
1.68 +
1.69 + public:
1.70 + // Construction/destruction
1.71 + JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS);
1.72 + ~JavaCallWrapper();
1.73 +
1.74 + // Accessors
1.75 + JavaThread* thread() const { return _thread; }
1.76 + JNIHandleBlock* handles() const { return _handles; }
1.77 +
1.78 + JavaFrameAnchor* anchor(void) { return &_anchor; }
1.79 +
1.80 + JavaValue* result() const { return _result; }
1.81 + // GC support
1.82 + Method* callee_method() { return _callee_method; }
1.83 + oop receiver() { return _receiver; }
1.84 + void oops_do(OopClosure* f);
1.85 +
1.86 + bool is_first_frame() const { return _anchor.last_Java_sp() == NULL; }
1.87 +
1.88 +};
1.89 +
1.90 +
1.91 +// Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args)
1.92 +class JavaCallArguments : public StackObj {
1.93 + private:
1.94 + enum Constants {
1.95 + _default_size = 8 // Must be at least # of arguments in JavaCalls methods
1.96 + };
1.97 +
1.98 + intptr_t _value_buffer [_default_size + 1];
1.99 + bool _is_oop_buffer[_default_size + 1];
1.100 +
1.101 + intptr_t* _value;
1.102 + bool* _is_oop;
1.103 + int _size;
1.104 + int _max_size;
1.105 + bool _start_at_zero; // Support late setting of receiver
1.106 +
1.107 + void initialize() {
1.108 + // Starts at first element to support set_receiver.
1.109 + _value = &_value_buffer[1];
1.110 + _is_oop = &_is_oop_buffer[1];
1.111 +
1.112 + _max_size = _default_size;
1.113 + _size = 0;
1.114 + _start_at_zero = false;
1.115 + }
1.116 +
1.117 + public:
1.118 + JavaCallArguments() { initialize(); }
1.119 +
1.120 + JavaCallArguments(Handle receiver) {
1.121 + initialize();
1.122 + push_oop(receiver);
1.123 + }
1.124 +
1.125 + JavaCallArguments(int max_size) {
1.126 + if (max_size > _default_size) {
1.127 + _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1);
1.128 + _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1);
1.129 +
1.130 + // Reserve room for potential receiver in value and is_oop
1.131 + _value++; _is_oop++;
1.132 +
1.133 + _max_size = max_size;
1.134 + _size = 0;
1.135 + _start_at_zero = false;
1.136 + } else {
1.137 + initialize();
1.138 + }
1.139 + }
1.140 +
1.141 + inline void push_oop(Handle h) { _is_oop[_size] = true;
1.142 + JNITypes::put_obj((oop)h.raw_value(), _value, _size); }
1.143 +
1.144 + inline void push_int(int i) { _is_oop[_size] = false;
1.145 + JNITypes::put_int(i, _value, _size); }
1.146 +
1.147 + inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
1.148 + JNITypes::put_double(d, _value, _size); }
1.149 +
1.150 + inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
1.151 + JNITypes::put_long(l, _value, _size); }
1.152 +
1.153 + inline void push_float(float f) { _is_oop[_size] = false;
1.154 + JNITypes::put_float(f, _value, _size); }
1.155 +
1.156 + // receiver
1.157 + Handle receiver() {
1.158 + assert(_size > 0, "must at least be one argument");
1.159 + assert(_is_oop[0], "first argument must be an oop");
1.160 + assert(_value[0] != 0, "receiver must be not-null");
1.161 + return Handle((oop*)_value[0], false);
1.162 + }
1.163 +
1.164 + void set_receiver(Handle h) {
1.165 + assert(_start_at_zero == false, "can only be called once");
1.166 + _start_at_zero = true;
1.167 + _is_oop--;
1.168 + _value--;
1.169 + _size++;
1.170 + _is_oop[0] = true;
1.171 + _value[0] = (intptr_t)h.raw_value();
1.172 + }
1.173 +
1.174 + // Converts all Handles to oops, and returns a reference to parameter vector
1.175 + intptr_t* parameters() ;
1.176 + int size_of_parameters() const { return _size; }
1.177 +
1.178 + // Verify that pushed arguments fits a given method
1.179 + void verify(methodHandle method, BasicType return_type, Thread *thread);
1.180 +};
1.181 +
1.182 +// All calls to Java have to go via JavaCalls. Sets up the stack frame
1.183 +// and makes sure that the last_Java_frame pointers are chained correctly.
1.184 +//
1.185 +
1.186 +class JavaCalls: AllStatic {
1.187 + static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS);
1.188 + public:
1.189 + // Optimized Constuctor call
1.190 + static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS);
1.191 +
1.192 + // call_special
1.193 + // ------------
1.194 + // The receiver must be first oop in argument list
1.195 + static void call_special(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);
1.196 +
1.197 + static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); // No args
1.198 + static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
1.199 + static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);
1.200 +
1.201 + // virtual call
1.202 + // ------------
1.203 +
1.204 + // The receiver must be first oop in argument list
1.205 + static void call_virtual(JavaValue* result, KlassHandle spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);
1.206 +
1.207 + static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, TRAPS); // No args
1.208 + static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
1.209 + static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);
1.210 +
1.211 + // Static call
1.212 + // -----------
1.213 + static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);
1.214 +
1.215 + static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS);
1.216 + static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
1.217 + static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);
1.218 +
1.219 + // Low-level interface
1.220 + static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS);
1.221 +};
1.222 +
1.223 +#endif // SHARE_VM_RUNTIME_JAVACALLS_HPP
