1 /* 2 * Copyright (c) 1998, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "asm/macroAssembler.inline.hpp" 27 #include "interpreter/interp_masm.hpp" 28 #include "interpreter/interpreter.hpp" 29 #include "interpreter/interpreterRuntime.hpp" 30 #include "memory/allocation.inline.hpp" 31 #include "oops/method.hpp" 32 #include "oops/oop.inline.hpp" 33 #include "runtime/handles.inline.hpp" 34 #include "runtime/icache.hpp" 35 #include "runtime/interfaceSupport.inline.hpp" 36 #include "runtime/signature.hpp" 37 38 39 #define __ _masm-> 40 41 42 // Implementation of SignatureHandlerGenerator 43 InterpreterRuntime::SignatureHandlerGenerator::SignatureHandlerGenerator( 44 const methodHandle& method, CodeBuffer* buffer) : NativeSignatureIterator(method) { 45 _masm = new MacroAssembler(buffer); 46 } 47 48 void InterpreterRuntime::SignatureHandlerGenerator::pass_word(int size_of_arg, int offset_in_arg) { 49 Argument jni_arg(jni_offset() + offset_in_arg, false); 50 Register Rtmp = O0; 51 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp); 52 53 __ store_argument(Rtmp, jni_arg); 54 } 55 56 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() { 57 Argument jni_arg(jni_offset(), false); 58 Register Rtmp = O0; 59 60 __ ldx(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp); 61 __ store_long_argument(Rtmp, jni_arg); 62 } 63 64 65 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() { 66 Argument jni_arg(jni_offset(), false); 67 FloatRegister Rtmp = F0; 68 __ ldf(FloatRegisterImpl::S, Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp); 69 __ store_float_argument(Rtmp, jni_arg); 70 } 71 72 73 void InterpreterRuntime::SignatureHandlerGenerator::pass_double() { 74 Argument jni_arg(jni_offset(), false); 75 FloatRegister Rtmp = F0; 76 __ ldf(FloatRegisterImpl::D, Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp); 77 __ store_double_argument(Rtmp, jni_arg); 78 } 79 80 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() { 81 Argument jni_arg(jni_offset(), false); 82 Argument java_arg( offset(), true); 83 Register Rtmp1 = O0; 84 Register Rtmp2 = jni_arg.is_register() ? jni_arg.as_register() : O0; 85 Register Rtmp3 = G3_scratch; 86 87 // the handle for a receiver will never be null 88 bool do_NULL_check = offset() != 0 || is_static(); 89 90 Address h_arg = Address(Llocals, Interpreter::local_offset_in_bytes(offset())); 91 __ ld_ptr(h_arg, Rtmp1); 92 if (!do_NULL_check) { 93 __ add(h_arg.base(), h_arg.disp(), Rtmp2); 94 } else { 95 if (Rtmp1 == Rtmp2) 96 __ tst(Rtmp1); 97 else __ addcc(G0, Rtmp1, Rtmp2); // optimize mov/test pair 98 Label L; 99 __ brx(Assembler::notZero, true, Assembler::pt, L); 100 __ delayed()->add(h_arg.base(), h_arg.disp(), Rtmp2); 101 __ bind(L); 102 } 103 __ store_ptr_argument(Rtmp2, jni_arg); // this is often a no-op 104 } 105 106 107 void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) { 108 109 // generate code to handle arguments 110 iterate(fingerprint); 111 112 // return result handler 113 AddressLiteral result_handler(Interpreter::result_handler(method()->result_type())); 114 __ sethi(result_handler, Lscratch); 115 __ retl(); 116 __ delayed()->add(Lscratch, result_handler.low10(), Lscratch); 117 118 __ flush(); 119 } 120 121 122 // Implementation of SignatureHandlerLibrary 123 124 void SignatureHandlerLibrary::pd_set_handler(address handler) {} 125 126 127 class SlowSignatureHandler: public NativeSignatureIterator { 128 private: 129 address _from; 130 intptr_t* _to; 131 intptr_t* _RegArgSignature; // Signature of first Arguments to be passed in Registers 132 uint _argcount; 133 134 enum { // We need to differenciate float from non floats in reg args 135 non_float = 0, 136 float_sig = 1, 137 double_sig = 2, 138 long_sig = 3 139 }; 140 141 virtual void pass_int() { 142 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0)); 143 _from -= Interpreter::stackElementSize; 144 add_signature( non_float ); 145 } 146 147 virtual void pass_object() { 148 // pass address of from 149 intptr_t *from_addr = (intptr_t*)(_from + Interpreter::local_offset_in_bytes(0)); 150 *_to++ = (*from_addr == 0) ? NULL : (intptr_t) from_addr; 151 _from -= Interpreter::stackElementSize; 152 add_signature( non_float ); 153 } 154 155 virtual void pass_float() { 156 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0)); 157 _from -= Interpreter::stackElementSize; 158 add_signature( float_sig ); 159 } 160 161 virtual void pass_double() { 162 *_to++ = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1)); 163 _from -= 2*Interpreter::stackElementSize; 164 add_signature( double_sig ); 165 } 166 167 virtual void pass_long() { 168 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1)); 169 _to += 1; 170 _from -= 2*Interpreter::stackElementSize; 171 add_signature( long_sig ); 172 } 173 174 virtual void add_signature( intptr_t sig_type ) { 175 if ( _argcount < (sizeof (intptr_t))*4 ) { 176 *_RegArgSignature |= (sig_type << (_argcount*2) ); 177 _argcount++; 178 } 179 } 180 181 182 public: 183 SlowSignatureHandler(const methodHandle& method, address from, intptr_t* to, intptr_t *RegArgSig) : NativeSignatureIterator(method) { 184 _from = from; 185 _to = to; 186 _RegArgSignature = RegArgSig; 187 *_RegArgSignature = 0; 188 _argcount = method->is_static() ? 2 : 1; 189 } 190 }; 191 192 193 JRT_ENTRY(address, InterpreterRuntime::slow_signature_handler( 194 JavaThread* thread, 195 Method* method, 196 intptr_t* from, 197 intptr_t* to )) 198 methodHandle m(thread, method); 199 assert(m->is_native(), "sanity check"); 200 // handle arguments 201 // Warning: We use reg arg slot 00 temporarily to return the RegArgSignature 202 // back to the code that pops the arguments into the CPU registers 203 SlowSignatureHandler(m, (address)from, m->is_static() ? to+2 : to+1, to).iterate((uint64_t)CONST64(-1)); 204 // return result handler 205 return Interpreter::result_handler(m->result_type()); 206 JRT_END