/*
* Copyright ( c ) 2008 , 2021 , 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
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*/
#include "precompiled.hpp"
#include "asm/macroAssembler.inline.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->
InterpreterRuntime::SignatureHandlerGenerator::SignatureHandlerGenerator(
const methodHandle& method, CodeBuffer* buffer) : NativeSignatureIterator(method) {
_masm = new MacroAssembler(buffer);
_abi_offset = 0 ;
_ireg = is_static() ? 2 : 1 ;
#ifdef __ABI_HARD__
_fp_slot = 0 ;
_single_fpr_slot = 0 ;
#endif
}
#ifdef SHARING_FAST_NATIVE_FINGERPRINTS
// mapping from SignatureIterator param to (common) type of parsing
static const BasicType shared_type[] = {
T_INT, // bool
T_INT, // char
#ifndef __ABI_HARD__
T_INT, // float, passed as int
T_LONG, // double, passed as long
#else
T_FLOAT, // float
T_DOUBLE, // double
#endif
T_INT, // byte
T_INT, // short
T_INT, // int
T_LONG, // long
T_OBJECT, // obj
T_OBJECT, // array
};
uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
if (fingerprint == UCONST64(-1 )) {
// special signature used when the argument list cannot be encoded in a 64 bits value
return fingerprint;
}
int shift = SignatureIterator::fp_static_feature_size;
SignatureIterator::fingerprint_t result = fingerprint & ((1 << shift) - 1 );
BasicType ret_type = SignatureIterator::fp_return_type(fingerprint);
// For ARM, the fast signature handler only needs to know whether
// the return value must be unboxed. T_OBJECT and T_ARRAY need not
// be distinguished from each other and all other return values
// behave like integers with respect to the handler except T_BOOLEAN
// which must be mapped to the range 0..1.
if (is_reference_type(ret_type)) {
ret_type = T_OBJECT;
} else if (ret_type != T_BOOLEAN) {
ret_type = T_INT;
}
result |= ((SignatureIterator::fingerprint_t) ret_type) << shift;
shift += SignatureIterator::fp_result_feature_size;
SignatureIterator::fingerprint_t unaccumulator = SignatureIterator::fp_start_parameters(fingerprint);
while (true ) {
BasicType type = SignatureIterator::fp_next_parameter(unaccumulator);
if (type == (BasicType)SignatureIterator::fp_parameters_done) {
return result;
}
assert(SignatureIterator::fp_is_valid_type(type), "garbled fingerprint" );
BasicType shared = shared_type[type - T_BOOLEAN];
result |= ((SignatureIterator::fingerprint_t) shared) << shift;
shift += SignatureIterator::fp_parameter_feature_size;
}
}
#endif // SHARING_FAST_NATIVE_FINGERPRINTS
// Implementation of SignatureHandlerGenerator
void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
if (_ireg < GPR_PARAMS) {
Register dst = as_Register(_ireg);
__ ldr_s32(dst, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
_ireg++;
} else {
__ ldr_s32(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
__ str_32(Rtemp, Address(SP, _abi_offset * wordSize));
_abi_offset++;
}
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
if (_ireg <= 2 ) {
#if (ALIGN_WIDE_ARGUMENTS == 1 )
if ((_ireg & 1 ) != 0 ) {
// 64-bit values should be 8-byte aligned
_ireg++;
}
#endif
Register dst1 = as_Register(_ireg);
Register dst2 = as_Register(_ireg+1 );
__ ldr(dst1, Address(Rlocals, Interpreter::local_offset_in_bytes(offset()+1 )));
__ ldr(dst2, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
_ireg += 2 ;
#if (ALIGN_WIDE_ARGUMENTS == 0 )
} else if (_ireg == 3 ) {
// uses R3 + one stack slot
Register dst1 = as_Register(_ireg);
__ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
__ ldr(dst1, Address(Rlocals, Interpreter::local_offset_in_bytes(offset()+1 )));
__ str(Rtemp, Address(SP, _abi_offset * wordSize));
_ireg += 1 ;
_abi_offset += 1 ;
#endif
} else {
#if (ALIGN_WIDE_ARGUMENTS == 1 )
if (_abi_offset & 1 ) _abi_offset++;
#endif
__ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset()+1 )));
__ str(Rtemp, Address(SP, (_abi_offset) * wordSize));
__ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
__ str(Rtemp, Address(SP, (_abi_offset+1 ) * wordSize));
_abi_offset += 2 ;
_ireg = 4 ;
}
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
if (_ireg < 4 ) {
Register dst = as_Register(_ireg);
__ ldr(dst, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
__ cmp(dst, 0 );
__ sub(dst, Rlocals, -Interpreter::local_offset_in_bytes(offset()), ne);
_ireg++;
} else {
__ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
__ cmp(Rtemp, 0 );
__ sub(Rtemp, Rlocals, -Interpreter::local_offset_in_bytes(offset()), ne);
__ str(Rtemp, Address(SP, _abi_offset * wordSize));
_abi_offset++;
}
}
#ifndef __ABI_HARD__
void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
if (_ireg < 4 ) {
Register dst = as_Register(_ireg);
__ ldr(dst, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
_ireg++;
} else {
__ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
__ str(Rtemp, Address(SP, _abi_offset * wordSize));
_abi_offset++;
}
}
#else
#ifndef __SOFTFP__
void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
if ((_fp_slot < 16 ) || (_single_fpr_slot & 1 )) {
if ((_single_fpr_slot & 1 ) == 0 ) {
_single_fpr_slot = _fp_slot;
_fp_slot += 2 ;
}
__ flds(as_FloatRegister(_single_fpr_slot), Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
_single_fpr_slot++;
} else {
__ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
__ str(Rtemp, Address(SP, _abi_offset * wordSize));
_abi_offset++;
}
}
void InterpreterRuntime::SignatureHandlerGenerator::pass_double() {
if (_fp_slot <= 14 ) {
__ fldd(as_FloatRegister(_fp_slot), Address(Rlocals, Interpreter::local_offset_in_bytes(offset()+1 )));
_fp_slot += 2 ;
} else {
__ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset()+1 )));
__ str(Rtemp, Address(SP, (_abi_offset) * wordSize));
__ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
__ str(Rtemp, Address(SP, (_abi_offset+1 ) * wordSize));
_abi_offset += 2 ;
_single_fpr_slot = 16 ;
}
}
#endif // __SOFTFP__
#endif // __ABI_HARD__
void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) {
iterate(fingerprint);
BasicType result_type = SignatureIterator::fp_return_type(fingerprint);
address result_handler = Interpreter::result_handler(result_type);
__ mov_slow(R0, (intptr_t)result_handler);
__ ret();
}
// Implementation of SignatureHandlerLibrary
void SignatureHandlerLibrary::pd_set_handler(address handler) {}
class SlowSignatureHandler: public NativeSignatureIterator {
private :
address _from;
intptr_t* _to;
#ifndef __ABI_HARD__
virtual void pass_int() {
*_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0 ));
_from -= Interpreter::stackElementSize;
}
virtual void pass_float() {
*_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0 ));
_from -= Interpreter::stackElementSize;
}
virtual void pass_long() {
#if (ALIGN_WIDE_ARGUMENTS == 1 )
if (((intptr_t)_to & 7 ) != 0 ) {
// 64-bit values should be 8-byte aligned
_to++;
}
#endif
_to[0 ] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1 ));
_to[1 ] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0 ));
_to += 2 ;
_from -= 2 *Interpreter::stackElementSize;
}
virtual void pass_object() {
intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0 ));
*_to++ = (*(intptr_t*)from_addr == 0 ) ? (intptr_t)NULL : from_addr;
_from -= Interpreter::stackElementSize;
}
#else
intptr_t* _toFP;
intptr_t* _toGP;
int _last_gp;
int _last_fp;
int _last_single_fp;
virtual void pass_int() {
if (_last_gp < GPR_PARAMS) {
_toGP[_last_gp++] = *(jint *)(_from+Interpreter::local_offset_in_bytes(0 ));
} else {
*_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0 ));
}
_from -= Interpreter::stackElementSize;
}
virtual void pass_long() {
assert(ALIGN_WIDE_ARGUMENTS == 1 , "ABI_HARD not supported with unaligned wide arguments" );
if (_last_gp <= 2 ) {
if (_last_gp & 1 ) _last_gp++;
_toGP[_last_gp++] = *(jint *)(_from+Interpreter::local_offset_in_bytes(1 ));
_toGP[_last_gp++] = *(jint *)(_from+Interpreter::local_offset_in_bytes(0 ));
} else {
if (((intptr_t)_to & 7 ) != 0 ) {
// 64-bit values should be 8-byte aligned
_to++;
}
_to[0 ] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1 ));
_to[1 ] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0 ));
_to += 2 ;
_last_gp = 4 ;
}
_from -= 2 *Interpreter::stackElementSize;
}
virtual void pass_object() {
intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0 ));
if (_last_gp < GPR_PARAMS) {
_toGP[_last_gp++] = (*(intptr_t*)from_addr == 0 ) ? NULL : from_addr;
} else {
*_to++ = (*(intptr_t*)from_addr == 0 ) ? NULL : from_addr;
}
_from -= Interpreter::stackElementSize;
}
virtual void pass_float() {
if ((_last_fp < 16 ) || (_last_single_fp & 1 )) {
if ((_last_single_fp & 1 ) == 0 ) {
_last_single_fp = _last_fp;
_last_fp += 2 ;
}
_toFP[_last_single_fp++] = *(jint *)(_from+Interpreter::local_offset_in_bytes(0 ));
} else {
*_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0 ));
}
_from -= Interpreter::stackElementSize;
}
virtual void pass_double() {
assert(ALIGN_WIDE_ARGUMENTS == 1 , "ABI_HARD not supported with unaligned wide arguments" );
if (_last_fp <= 14 ) {
_toFP[_last_fp++] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1 ));
_toFP[_last_fp++] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0 ));
} else {
if (((intptr_t)_to & 7 ) != 0 ) { // 64-bit values should be 8-byte aligned
_to++;
}
_to[0 ] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1 ));
_to[1 ] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0 ));
_to += 2 ;
_last_single_fp = 16 ;
}
_from -= 2 *Interpreter::stackElementSize;
}
#endif // !__ABI_HARD__
public :
SlowSignatureHandler(const methodHandle& method, address from, intptr_t* to) :
NativeSignatureIterator(method) {
_from = from;
#ifdef __ABI_HARD__
_toGP = to;
_toFP = _toGP + GPR_PARAMS;
_to = _toFP + (8 *2 );
_last_gp = (is_static() ? 2 : 1 );
_last_fp = 0 ;
_last_single_fp = 0 ;
#else
_to = to + (is_static() ? 2 : 1 );
#endif // __ABI_HARD__
}
};
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" );
SlowSignatureHandler(m, (address)from, to).iterate(UCONST64(-1 ));
return Interpreter::result_handler(m->result_type());
JRT_END
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