/*
* Copyright ( c ) 2003 , 2022 , 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 .
*
*/
#include "precompiled.hpp"
#include "interpreter/interp_masm.hpp"
#include "interpreter/interpreter.hpp"
#include "interpreter/interpreterRuntime.hpp"
#include "memory/allocation.inline.hpp"
#include "oops/method.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/icache.hpp"
#include "runtime/interfaceSupport.inline.hpp"
#include "runtime/signature.hpp"
#define __ _masm->
// Implementation of SignatureHandlerGenerator
InterpreterRuntime::SignatureHandlerGenerator::SignatureHandlerGenerator(const methodHandle& method, CodeBuffer* buffer) :
NativeSignatureIterator(method) {
_masm = new MacroAssembler(buffer);
#ifdef AMD64
#ifdef _WIN64
_num_args = (method->is_static() ? 1 : 0 );
_stack_offset = (Argument::n_int_register_parameters_c+1 )* wordSize; // don't overwrite return address
#else
_num_int_args = (method->is_static() ? 1 : 0 );
_num_fp_args = 0 ;
_stack_offset = wordSize; // don't overwrite return address
#endif // _WIN64
#endif // AMD64
}
Register InterpreterRuntime::SignatureHandlerGenerator::from() { return r14; }
Register InterpreterRuntime::SignatureHandlerGenerator::to() { return rsp; }
Register InterpreterRuntime::SignatureHandlerGenerator::temp() { return rscratch1; }
void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
const Address src(from(), Interpreter::local_offset_in_bytes(offset()));
#ifdef _WIN64
switch (_num_args) {
case 0 :
__ movl(c_rarg1, src);
_num_args++;
break ;
case 1 :
__ movl(c_rarg2, src);
_num_args++;
break ;
case 2 :
__ movl(c_rarg3, src);
_num_args++;
break ;
default :
__ movl(rax, src);
__ movl(Address(to(), _stack_offset), rax);
_stack_offset += wordSize;
break ;
}
#else
switch (_num_int_args) {
case 0 :
__ movl(c_rarg1, src);
_num_int_args++;
break ;
case 1 :
__ movl(c_rarg2, src);
_num_int_args++;
break ;
case 2 :
__ movl(c_rarg3, src);
_num_int_args++;
break ;
case 3 :
__ movl(c_rarg4, src);
_num_int_args++;
break ;
case 4 :
__ movl(c_rarg5, src);
_num_int_args++;
break ;
default :
__ movl(rax, src);
__ movl(Address(to(), _stack_offset), rax);
_stack_offset += wordSize;
break ;
}
#endif
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
const Address src(from(), Interpreter::local_offset_in_bytes(offset() + 1 ));
#ifdef _WIN64
switch (_num_args) {
case 0 :
__ movptr(c_rarg1, src);
_num_args++;
break ;
case 1 :
__ movptr(c_rarg2, src);
_num_args++;
break ;
case 2 :
__ movptr(c_rarg3, src);
_num_args++;
break ;
case 3 :
default :
__ movptr(rax, src);
__ movptr(Address(to(), _stack_offset), rax);
_stack_offset += wordSize;
break ;
}
#else
switch (_num_int_args) {
case 0 :
__ movptr(c_rarg1, src);
_num_int_args++;
break ;
case 1 :
__ movptr(c_rarg2, src);
_num_int_args++;
break ;
case 2 :
__ movptr(c_rarg3, src);
_num_int_args++;
break ;
case 3 :
__ movptr(c_rarg4, src);
_num_int_args++;
break ;
case 4 :
__ movptr(c_rarg5, src);
_num_int_args++;
break ;
default :
__ movptr(rax, src);
__ movptr(Address(to(), _stack_offset), rax);
_stack_offset += wordSize;
break ;
}
#endif
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
const Address src(from(), Interpreter::local_offset_in_bytes(offset()));
#ifdef _WIN64
if (_num_args < Argument::n_float_register_parameters_c-1 ) {
__ movflt(as_XMMRegister(++_num_args), src);
} else {
__ movl(rax, src);
__ movl(Address(to(), _stack_offset), rax);
_stack_offset += wordSize;
}
#else
if (_num_fp_args < Argument::n_float_register_parameters_c) {
__ movflt(as_XMMRegister(_num_fp_args++), src);
} else {
__ movl(rax, src);
__ movl(Address(to(), _stack_offset), rax);
_stack_offset += wordSize;
}
#endif
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_double() {
const Address src(from(), Interpreter::local_offset_in_bytes(offset() + 1 ));
#ifdef _WIN64
if (_num_args < Argument::n_float_register_parameters_c-1 ) {
__ movdbl(as_XMMRegister(++_num_args), src);
} else {
__ movptr(rax, src);
__ movptr(Address(to(), _stack_offset), rax);
_stack_offset += wordSize;
}
#else
if (_num_fp_args < Argument::n_float_register_parameters_c) {
__ movdbl(as_XMMRegister(_num_fp_args++), src);
} else {
__ movptr(rax, src);
__ movptr(Address(to(), _stack_offset), rax);
_stack_offset += wordSize;
}
#endif
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
const Address src(from(), Interpreter::local_offset_in_bytes(offset()));
#ifdef _WIN64
switch (_num_args) {
case 0 :
assert(offset() == 0 , "argument register 1 can only be (non-null) receiver" );
__ lea(c_rarg1, src);
_num_args++;
break ;
case 1 :
__ lea(rax, src);
__ xorl(c_rarg2, c_rarg2);
__ cmpptr(src, 0 );
__ cmov(Assembler::notEqual, c_rarg2, rax);
_num_args++;
break ;
case 2 :
__ lea(rax, src);
__ xorl(c_rarg3, c_rarg3);
__ cmpptr(src, 0 );
__ cmov(Assembler::notEqual, c_rarg3, rax);
_num_args++;
break ;
default :
__ lea(rax, src);
__ xorl(temp(), temp());
__ cmpptr(src, 0 );
__ cmov(Assembler::notEqual, temp(), rax);
__ movptr(Address(to(), _stack_offset), temp());
_stack_offset += wordSize;
break ;
}
#else
switch (_num_int_args) {
case 0 :
assert(offset() == 0 , "argument register 1 can only be (non-null) receiver" );
__ lea(c_rarg1, src);
_num_int_args++;
break ;
case 1 :
__ lea(rax, src);
__ xorl(c_rarg2, c_rarg2);
__ cmpptr(src, 0 );
__ cmov(Assembler::notEqual, c_rarg2, rax);
_num_int_args++;
break ;
case 2 :
__ lea(rax, src);
__ xorl(c_rarg3, c_rarg3);
__ cmpptr(src, 0 );
__ cmov(Assembler::notEqual, c_rarg3, rax);
_num_int_args++;
break ;
case 3 :
__ lea(rax, src);
__ xorl(c_rarg4, c_rarg4);
__ cmpptr(src, 0 );
__ cmov(Assembler::notEqual, c_rarg4, rax);
_num_int_args++;
break ;
case 4 :
__ lea(rax, src);
__ xorl(c_rarg5, c_rarg5);
__ cmpptr(src, 0 );
__ cmov(Assembler::notEqual, c_rarg5, rax);
_num_int_args++;
break ;
default :
__ lea(rax, src);
__ xorl(temp(), temp());
__ cmpptr(src, 0 );
__ cmov(Assembler::notEqual, temp(), rax);
__ movptr(Address(to(), _stack_offset), temp());
_stack_offset += wordSize;
break ;
}
#endif
}
void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) {
// generate code to handle arguments
iterate(fingerprint);
// return result handler
__ lea(rax, ExternalAddress(Interpreter::result_handler(method()->result_type())));
__ ret(0 );
__ flush();
}
// Implementation of SignatureHandlerLibrary
void SignatureHandlerLibrary::pd_set_handler(address handler) {}
#ifdef _WIN64
class SlowSignatureHandler
: public NativeSignatureIterator {
private :
address _from;
intptr_t* _to;
intptr_t* _reg_args;
intptr_t* _fp_identifiers;
unsigned int _num_args;
virtual void pass_int()
{
jint from_obj = *(jint *)(_from+Interpreter::local_offset_in_bytes(0 ));
_from -= Interpreter::stackElementSize;
if (_num_args < Argument::n_int_register_parameters_c-1 ) {
*_reg_args++ = from_obj;
_num_args++;
} else {
*_to++ = from_obj;
}
}
virtual void pass_long()
{
intptr_t from_obj = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1 ));
_from -= 2 *Interpreter::stackElementSize;
if (_num_args < Argument::n_int_register_parameters_c-1 ) {
*_reg_args++ = from_obj;
_num_args++;
} else {
*_to++ = from_obj;
}
}
virtual void pass_object()
{
intptr_t *from_addr = (intptr_t*)(_from + Interpreter::local_offset_in_bytes(0 ));
_from -= Interpreter::stackElementSize;
if (_num_args < Argument::n_int_register_parameters_c-1 ) {
*_reg_args++ = (*from_addr == 0 ) ? NULL_WORD : (intptr_t) from_addr;
_num_args++;
} else {
*_to++ = (*from_addr == 0 ) ? NULL_WORD : (intptr_t) from_addr;
}
}
virtual void pass_float()
{
jint from_obj = *(jint *)(_from+Interpreter::local_offset_in_bytes(0 ));
_from -= Interpreter::stackElementSize;
if (_num_args < Argument::n_float_register_parameters_c-1 ) {
assert((_num_args*2 ) < BitsPerWord, "_num_args*2 is out of range" );
*_reg_args++ = from_obj;
*_fp_identifiers |= ((intptr_t)0 x01 << (_num_args*2 )); // mark as float
_num_args++;
} else {
*_to++ = from_obj;
}
}
virtual void pass_double()
{
intptr_t from_obj = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1 ));
_from -= 2 *Interpreter::stackElementSize;
if (_num_args < Argument::n_float_register_parameters_c-1 ) {
assert((_num_args*2 ) < BitsPerWord, "_num_args*2 is out of range" );
*_reg_args++ = from_obj;
*_fp_identifiers |= ((intptr_t)0 x3 << (_num_args*2 )); // mark as double
_num_args++;
} else {
*_to++ = from_obj;
}
}
public :
SlowSignatureHandler(const methodHandle& method, address from, intptr_t* to)
: NativeSignatureIterator(method)
{
_from = from;
_to = to;
_reg_args = to - (method->is_static() ? 4 : 5 );
_fp_identifiers = to - 2 ;
_to = _to + 4 ; // Windows reserves stack space for register arguments
*(int *) _fp_identifiers = 0 ;
_num_args = (method->is_static() ? 1 : 0 );
}
};
#else
class SlowSignatureHandler
: public NativeSignatureIterator {
private :
address _from;
intptr_t* _to;
intptr_t* _int_args;
intptr_t* _fp_args;
intptr_t* _fp_identifiers;
unsigned int _num_int_args;
unsigned int _num_fp_args;
virtual void pass_int()
{
jint from_obj = *(jint *)(_from+Interpreter::local_offset_in_bytes(0 ));
_from -= Interpreter::stackElementSize;
if (_num_int_args < Argument::n_int_register_parameters_c-1 ) {
*_int_args++ = from_obj;
_num_int_args++;
} else {
*_to++ = from_obj;
}
}
virtual void pass_long()
{
intptr_t from_obj = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1 ));
_from -= 2 *Interpreter::stackElementSize;
if (_num_int_args < Argument::n_int_register_parameters_c-1 ) {
*_int_args++ = from_obj;
_num_int_args++;
} else {
*_to++ = from_obj;
}
}
virtual void pass_object()
{
intptr_t *from_addr = (intptr_t*)(_from + Interpreter::local_offset_in_bytes(0 ));
_from -= Interpreter::stackElementSize;
if (_num_int_args < Argument::n_int_register_parameters_c-1 ) {
*_int_args++ = (*from_addr == 0 ) ? NULL_WORD : (intptr_t)from_addr;
_num_int_args++;
} else {
*_to++ = (*from_addr == 0 ) ? NULL_WORD : (intptr_t) from_addr;
}
}
virtual void pass_float()
{
jint from_obj = *(jint*)(_from+Interpreter::local_offset_in_bytes(0 ));
_from -= Interpreter::stackElementSize;
if (_num_fp_args < Argument::n_float_register_parameters_c) {
*_fp_args++ = from_obj;
_num_fp_args++;
} else {
*_to++ = from_obj;
}
}
virtual void pass_double()
{
intptr_t from_obj = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1 ));
_from -= 2 *Interpreter::stackElementSize;
if (_num_fp_args < Argument::n_float_register_parameters_c) {
*_fp_args++ = from_obj;
*_fp_identifiers |= (1 << _num_fp_args); // mark as double
_num_fp_args++;
} else {
*_to++ = from_obj;
}
}
public :
SlowSignatureHandler(const methodHandle& method, address from, intptr_t* to)
: NativeSignatureIterator(method)
{
_from = from;
_to = to;
_int_args = to - (method->is_static() ? 14 : 15 );
_fp_args = to - 9 ;
_fp_identifiers = to - 10 ;
*(int *) _fp_identifiers = 0 ;
_num_int_args = (method->is_static() ? 1 : 0 );
_num_fp_args = 0 ;
}
};
#endif
JRT_ENTRY(address,
InterpreterRuntime::slow_signature_handler(JavaThread* current,
Method* method,
intptr_t* from,
intptr_t* to))
methodHandle m(current, (Method*)method);
assert(m->is_native(), "sanity check" );
// handle arguments
SlowSignatureHandler(m, (address)from, to + 1 ).iterate((uint64_t)CONST64(-1 ));
// return result handler
return Interpreter::result_handler(m->result_type());
JRT_END
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