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/*
* Copyright (c) 1997, 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_INTERPRETER_HPP
#define SHARE_VM_INTERPRETER_INTERPRETER_HPP
#include "code/stubs.hpp"
#include "interpreter/cppInterpreter.hpp"
#include "interpreter/templateInterpreter.hpp"
#ifdef ZERO
#ifdef TARGET_ARCH_zero
# include "entry_zero.hpp"
#endif
#endif
// This file contains the platform-independent parts
// of the interpreter and the interpreter generator.
//------------------------------------------------------------------------------------------------------------------------
// An InterpreterCodelet is a piece of interpreter code. All
// interpreter code is generated into little codelets which
// contain extra information for debugging and printing purposes.
class InterpreterCodelet: public Stub {
friend class VMStructs;
private:
int _size; // the size in bytes
const char* _description; // a description of the codelet, for debugging & printing
Bytecodes::Code _bytecode; // associated bytecode if any
DEBUG_ONLY(CodeComments _comments;) // Comments for annotating assembler output.
public:
// Initialization/finalization
void initialize(int size,
CodeComments& comments) { _size = size; DEBUG_ONLY(_comments.assign(comments);) }
void finalize() { ShouldNotCallThis(); }
// General info/converters
int size() const { return _size; }
static int code_size_to_size(int code_size) { return round_to(sizeof(InterpreterCodelet), CodeEntryAlignment) + code_size; }
// Code info
address code_begin() const { return (address)this + round_to(sizeof(InterpreterCodelet), CodeEntryAlignment); }
address code_end() const { return (address)this + size(); }
// Debugging
void verify();
void print_on(outputStream* st) const;
void print() const { print_on(tty); }
// Interpreter-specific initialization
void initialize(const char* description, Bytecodes::Code bytecode);
// Interpreter-specific attributes
int code_size() const { return code_end() - code_begin(); }
const char* description() const { return _description; }
Bytecodes::Code bytecode() const { return _bytecode; }
};
// Define a prototype interface
DEF_STUB_INTERFACE(InterpreterCodelet);
//------------------------------------------------------------------------------------------------------------------------
// A CodeletMark serves as an automatic creator/initializer for Codelets
// (As a subclass of ResourceMark it automatically GC's the allocated
// code buffer and assemblers).
class CodeletMark: ResourceMark {
private:
InterpreterCodelet* _clet;
InterpreterMacroAssembler** _masm;
CodeBuffer _cb;
int codelet_size() {
// Request the whole code buffer (minus a little for alignment).
// The commit call below trims it back for each codelet.
int codelet_size = AbstractInterpreter::code()->available_space() - 2*K;
// Guarantee there's a little bit of code space left.
guarantee (codelet_size > 0 && (size_t)codelet_size > 2*K,
"not enough space for interpreter generation");
return codelet_size;
}
public:
CodeletMark(
InterpreterMacroAssembler*& masm,
const char* description,
Bytecodes::Code bytecode = Bytecodes::_illegal):
_clet((InterpreterCodelet*)AbstractInterpreter::code()->request(codelet_size())),
_cb(_clet->code_begin(), _clet->code_size())
{ // request all space (add some slack for Codelet data)
assert (_clet != NULL, "we checked not enough space already");
// initialize Codelet attributes
_clet->initialize(description, bytecode);
// create assembler for code generation
masm = new InterpreterMacroAssembler(&_cb);
_masm = &masm;
}
~CodeletMark() {
// align so printing shows nop's instead of random code at the end (Codelets are aligned)
(*_masm)->align(wordSize);
// make sure all code is in code buffer
(*_masm)->flush();
// commit Codelet
AbstractInterpreter::code()->commit((*_masm)->code()->pure_insts_size(), (*_masm)->code()->comments());
// make sure nobody can use _masm outside a CodeletMark lifespan
*_masm = NULL;
}
};
// Wrapper classes to produce Interpreter/InterpreterGenerator from either
// the c++ interpreter or the template interpreter.
class Interpreter: public CC_INTERP_ONLY(CppInterpreter) NOT_CC_INTERP(TemplateInterpreter) {
public:
// Debugging/printing
static InterpreterCodelet* codelet_containing(address pc) { return (InterpreterCodelet*)_code->stub_containing(pc); }
#ifdef TARGET_ARCH_x86
# include "interpreter_x86.hpp"
#endif
#ifdef TARGET_ARCH_sparc
# include "interpreter_sparc.hpp"
#endif
#ifdef TARGET_ARCH_zero
# include "interpreter_zero.hpp"
#endif
#ifdef TARGET_ARCH_arm
# include "interpreter_arm.hpp"
#endif
#ifdef TARGET_ARCH_ppc
# include "interpreter_ppc.hpp"
#endif
};
#endif // SHARE_VM_INTERPRETER_INTERPRETER_HPP
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