mirror of
https://github.com/openjdk/jdk.git
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127 lines
3.2 KiB
C++
127 lines
3.2 KiB
C++
/*
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* Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.
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* Copyright 2007, 2008 Red Hat, Inc.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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class SignatureHandler {
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public:
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static SignatureHandler *from_handlerAddr(address handlerAddr) {
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return (SignatureHandler *) handlerAddr;
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}
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public:
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ffi_cif* cif() const {
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return (ffi_cif *) this;
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}
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int argument_count() const {
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return cif()->nargs;
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}
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ffi_type** argument_types() const {
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return (ffi_type**) (cif() + 1);
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}
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ffi_type* argument_type(int i) const {
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return argument_types()[i];
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}
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ffi_type* result_type() const {
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return *(argument_types() + argument_count());
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}
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protected:
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friend class InterpreterRuntime;
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friend class SignatureHandlerLibrary;
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void finalize();
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};
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class SignatureHandlerGeneratorBase : public NativeSignatureIterator {
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private:
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ffi_cif* _cif;
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protected:
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SignatureHandlerGeneratorBase(methodHandle method, ffi_cif *cif)
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: NativeSignatureIterator(method), _cif(cif) {
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_cif->nargs = 0;
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}
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ffi_cif *cif() const {
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return _cif;
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}
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public:
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void generate(uint64_t fingerprint);
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private:
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void pass_int();
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void pass_long();
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void pass_float();
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void pass_double();
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void pass_object();
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private:
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void push(BasicType type);
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virtual void push(intptr_t value) = 0;
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};
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class SignatureHandlerGenerator : public SignatureHandlerGeneratorBase {
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private:
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CodeBuffer* _cb;
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public:
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SignatureHandlerGenerator(methodHandle method, CodeBuffer* buffer)
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: SignatureHandlerGeneratorBase(method, (ffi_cif *) buffer->code_end()),
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_cb(buffer) {
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_cb->set_code_end((address) (cif() + 1));
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}
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private:
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void push(intptr_t value) {
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intptr_t *dst = (intptr_t *) _cb->code_end();
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_cb->set_code_end((address) (dst + 1));
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*dst = value;
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}
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};
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class SlowSignatureHandlerGenerator : public SignatureHandlerGeneratorBase {
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private:
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intptr_t *_dst;
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public:
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SlowSignatureHandlerGenerator(methodHandle method, intptr_t* buf)
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: SignatureHandlerGeneratorBase(method, (ffi_cif *) buf) {
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_dst = (intptr_t *) (cif() + 1);
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}
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private:
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void push(intptr_t value) {
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*(_dst++) = value;
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}
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public:
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SignatureHandler *handler() const {
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return (SignatureHandler *) cif();
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}
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};
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