--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/javaCalls.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,195 @@
+/*
+ * Copyright 1997-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// A JavaCallWrapper is constructed before each JavaCall and destructed after the call.
+// Its purpose is to allocate/deallocate a new handle block and to save/restore the last
+// Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.
+
+class JavaCallWrapper: StackObj {
+ friend class VMStructs;
+ private:
+ JavaThread* _thread; // the thread to which this call belongs
+ JNIHandleBlock* _handles; // the saved handle block
+ methodOop _callee_method; // to be able to collect arguments if entry frame is top frame
+ oop _receiver; // the receiver of the call (if a non-static call)
+
+ JavaFrameAnchor _anchor; // last thread anchor state that we must restore
+
+ JavaValue* _result; // result value
+
+ public:
+ // Construction/destruction
+ JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS);
+ ~JavaCallWrapper();
+
+ // Accessors
+ JavaThread* thread() const { return _thread; }
+ JNIHandleBlock* handles() const { return _handles; }
+
+ JavaFrameAnchor* anchor(void) { return &_anchor; }
+
+ JavaValue* result() const { return _result; }
+ // GC support
+ methodOop callee_method() { return _callee_method; }
+ oop receiver() { return _receiver; }
+ void oops_do(OopClosure* f);
+
+};
+
+
+// Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args)
+class JavaCallArguments : public StackObj {
+ private:
+ enum Constants {
+ _default_size = 8 // Must be at least # of arguments in JavaCalls methods
+ };
+
+ intptr_t _value_buffer [_default_size + 1];
+ intptr_t _parameter_buffer [_default_size*2 + 1];
+ bool _is_oop_buffer[_default_size + 1];
+
+ intptr_t* _value;
+ intptr_t* _parameters;
+ bool* _is_oop;
+ int _size;
+ int _max_size;
+ bool _start_at_zero; // Support late setting of receiver
+
+ void initialize() {
+ // Starts at first element to support set_receiver.
+ _value = &_value_buffer[1];
+ _is_oop = &_is_oop_buffer[1];
+
+ _parameters = &_parameter_buffer[0];
+ _max_size = _default_size;
+ _size = 0;
+ _start_at_zero = false;
+ }
+
+ public:
+ JavaCallArguments() { initialize(); }
+
+ JavaCallArguments(Handle receiver) {
+ initialize();
+ push_oop(receiver);
+ }
+
+ JavaCallArguments(int max_size) {
+ if (max_size > _default_size) {
+ _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1);
+ _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1);
+ if (TaggedStackInterpreter) {
+ _parameters = NEW_RESOURCE_ARRAY(intptr_t, max_size*2 + 1);
+ }
+ // Reserve room for potential receiver in value and is_oop
+ _value++; _is_oop++;
+ _max_size = max_size;
+ _size = 0;
+ _start_at_zero = false;
+ } else {
+ initialize();
+ }
+ }
+
+ inline void push_oop(Handle h) { _is_oop[_size] = true;
+ JNITypes::put_obj((oop)h.raw_value(), _value, _size); }
+
+ inline void push_int(int i) { _is_oop[_size] = false;
+ JNITypes::put_int(i, _value, _size); }
+
+ inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
+ JNITypes::put_double(d, _value, _size); }
+
+ inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
+ JNITypes::put_long(l, _value, _size); }
+
+ inline void push_float(float f) { _is_oop[_size] = false;
+ JNITypes::put_float(f, _value, _size); }
+
+ // receiver
+ Handle receiver() {
+ assert(_size > 0, "must at least be one argument");
+ assert(_is_oop[0], "first argument must be an oop");
+ assert(_value[0] != 0, "receiver must be not-null");
+ return Handle((oop*)_value[0], false);
+ }
+
+ void set_receiver(Handle h) {
+ assert(_start_at_zero == false, "can only be called once");
+ _start_at_zero = true;
+ _is_oop--;
+ _value--;
+ _size++;
+ _is_oop[0] = true;
+ _value[0] = (intptr_t)h.raw_value();
+ }
+
+ // Converts all Handles to oops, and returns a reference to parameter vector
+ intptr_t* parameters() ;
+ int size_of_parameters() const { return _size; }
+
+ // Verify that pushed arguments fits a given method
+ void verify(methodHandle method, BasicType return_type, Thread *thread) PRODUCT_RETURN;
+};
+
+// All calls to Java have to go via JavaCalls. Sets up the stack frame
+// and makes sure that the last_Java_frame pointers are chained correctly.
+//
+
+class JavaCalls: AllStatic {
+ static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS);
+ public:
+ // Optimized Constuctor call
+ static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS);
+
+ // call_special
+ // ------------
+ // The receiver must be first oop in argument list
+ static void call_special(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
+
+ static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS); // No args
+ static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
+ static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
+
+ // virtual call
+ // ------------
+
+ // The receiver must be first oop in argument list
+ static void call_virtual(JavaValue* result, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
+
+ static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, TRAPS); // No args
+ static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
+ static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
+
+ // Static call
+ // -----------
+ static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
+
+ static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS);
+ static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
+ static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
+
+ // Low-level interface
+ static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS);
+};