1 /* 2 * Copyright (c) 1997, 2011, 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/assembler.hpp" 27 #include "interpreter/bytecodeHistogram.hpp" 28 #include "interpreter/interpreter.hpp" 29 #include "interpreter/interpreterGenerator.hpp" 30 #include "interpreter/interpreterRuntime.hpp" 31 #include "interpreter/templateTable.hpp" 32 #include "oops/arrayOop.hpp" 33 #include "oops/methodDataOop.hpp" 34 #include "oops/methodOop.hpp" 35 #include "oops/oop.inline.hpp" 36 #include "prims/jvmtiExport.hpp" 37 #include "prims/jvmtiThreadState.hpp" 38 #include "prims/methodHandles.hpp" 39 #include "runtime/arguments.hpp" 40 #include "runtime/deoptimization.hpp" 41 #include "runtime/frame.inline.hpp" 42 #include "runtime/sharedRuntime.hpp" 43 #include "runtime/stubRoutines.hpp" 44 #include "runtime/synchronizer.hpp" 45 #include "runtime/timer.hpp" 46 #include "runtime/vframeArray.hpp" 47 #include "utilities/debug.hpp" 48 #ifdef COMPILER1 49 #include "c1/c1_Runtime1.hpp" 50 #endif 51 52 #define __ _masm-> 53 54 //------------------------------------------------------------------------------------------------------------------------ 55 56 address AbstractInterpreterGenerator::generate_slow_signature_handler() { 57 address entry = __ pc(); 58 // rbx,: method 59 // rcx: temporary 60 // rdi: pointer to locals 61 // rsp: end of copied parameters area 62 __ mov(rcx, rsp); 63 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), rbx, rdi, rcx); 64 __ ret(0); 65 return entry; 66 } 67 68 69 // 70 // Various method entries (that c++ and asm interpreter agree upon) 71 //------------------------------------------------------------------------------------------------------------------------ 72 // 73 // 74 75 // Empty method, generate a very fast return. 76 77 address InterpreterGenerator::generate_empty_entry(void) { 78 79 // rbx,: methodOop 80 // rcx: receiver (unused) 81 // rsi: previous interpreter state (C++ interpreter) must preserve 82 // rsi: sender sp must set sp to this value on return 83 84 if (!UseFastEmptyMethods) return NULL; 85 86 address entry_point = __ pc(); 87 88 // If we need a safepoint check, generate full interpreter entry. 89 Label slow_path; 90 ExternalAddress state(SafepointSynchronize::address_of_state()); 91 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 92 SafepointSynchronize::_not_synchronized); 93 __ jcc(Assembler::notEqual, slow_path); 94 95 // do nothing for empty methods (do not even increment invocation counter) 96 // Code: _return 97 // _return 98 // return w/o popping parameters 99 __ pop(rax); 100 __ mov(rsp, rsi); 101 __ jmp(rax); 102 103 __ bind(slow_path); 104 (void) generate_normal_entry(false); 105 return entry_point; 106 } 107 108 address InterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { 109 110 // rbx,: methodOop 111 // rcx: scratrch 112 // rsi: sender sp 113 114 if (!InlineIntrinsics) return NULL; // Generate a vanilla entry 115 116 address entry_point = __ pc(); 117 118 // These don't need a safepoint check because they aren't virtually 119 // callable. We won't enter these intrinsics from compiled code. 120 // If in the future we added an intrinsic which was virtually callable 121 // we'd have to worry about how to safepoint so that this code is used. 122 123 // mathematical functions inlined by compiler 124 // (interpreter must provide identical implementation 125 // in order to avoid monotonicity bugs when switching 126 // from interpreter to compiler in the middle of some 127 // computation) 128 // 129 // stack: [ ret adr ] <-- rsp 130 // [ lo(arg) ] 131 // [ hi(arg) ] 132 // 133 134 // Note: For JDK 1.2 StrictMath doesn't exist and Math.sin/cos/sqrt are 135 // native methods. Interpreter::method_kind(...) does a check for 136 // native methods first before checking for intrinsic methods and 137 // thus will never select this entry point. Make sure it is not 138 // called accidentally since the SharedRuntime entry points will 139 // not work for JDK 1.2. 140 // 141 // We no longer need to check for JDK 1.2 since it's EOL'ed. 142 // The following check existed in pre 1.6 implementation, 143 // if (Universe::is_jdk12x_version()) { 144 // __ should_not_reach_here(); 145 // } 146 // Universe::is_jdk12x_version() always returns false since 147 // the JDK version is not yet determined when this method is called. 148 // This method is called during interpreter_init() whereas 149 // JDK version is only determined when universe2_init() is called. 150 151 // Note: For JDK 1.3 StrictMath exists and Math.sin/cos/sqrt are 152 // java methods. Interpreter::method_kind(...) will select 153 // this entry point for the corresponding methods in JDK 1.3. 154 // get argument 155 __ fld_d(Address(rsp, 1*wordSize)); 156 switch (kind) { 157 case Interpreter::java_lang_math_sin : 158 __ trigfunc('s'); 159 break; 160 case Interpreter::java_lang_math_cos : 161 __ trigfunc('c'); 162 break; 163 case Interpreter::java_lang_math_tan : 164 __ trigfunc('t'); 165 break; 166 case Interpreter::java_lang_math_sqrt: 167 __ fsqrt(); 168 break; 169 case Interpreter::java_lang_math_abs: 170 __ fabs(); 171 break; 172 case Interpreter::java_lang_math_log: 173 __ flog(); 174 // Store to stack to convert 80bit precision back to 64bits 175 __ push_fTOS(); 176 __ pop_fTOS(); 177 break; 178 case Interpreter::java_lang_math_log10: 179 __ flog10(); 180 // Store to stack to convert 80bit precision back to 64bits 181 __ push_fTOS(); 182 __ pop_fTOS(); 183 break; 184 default : 185 ShouldNotReachHere(); 186 } 187 188 // return double result in xmm0 for interpreter and compilers. 189 if (UseSSE >= 2) { 190 __ subptr(rsp, 2*wordSize); 191 __ fstp_d(Address(rsp, 0)); 192 __ movdbl(xmm0, Address(rsp, 0)); 193 __ addptr(rsp, 2*wordSize); 194 } 195 196 // done, result in FPU ST(0) or XMM0 197 __ pop(rdi); // get return address 198 __ mov(rsp, rsi); // set sp to sender sp 199 __ jmp(rdi); 200 201 return entry_point; 202 } 203 204 205 // Abstract method entry 206 // Attempt to execute abstract method. Throw exception 207 address InterpreterGenerator::generate_abstract_entry(void) { 208 209 // rbx,: methodOop 210 // rcx: receiver (unused) 211 // rsi: previous interpreter state (C++ interpreter) must preserve 212 213 // rsi: sender SP 214 215 address entry_point = __ pc(); 216 217 // abstract method entry 218 219 // pop return address, reset last_sp to NULL 220 __ empty_expression_stack(); 221 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed) 222 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 223 224 // throw exception 225 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError)); 226 // the call_VM checks for exception, so we should never return here. 227 __ should_not_reach_here(); 228 229 return entry_point; 230 } 231 232 233 // Method handle invoker 234 // Dispatch a method of the form java.lang.invoke.MethodHandles::invoke(...) 235 address InterpreterGenerator::generate_method_handle_entry(void) { 236 if (!EnableInvokeDynamic) { 237 return generate_abstract_entry(); 238 } 239 240 address entry_point = MethodHandles::generate_method_handle_interpreter_entry(_masm); 241 242 return entry_point; 243 } 244 245 void Deoptimization::unwind_callee_save_values(frame* f, vframeArray* vframe_array) { 246 247 // This code is sort of the equivalent of C2IAdapter::setup_stack_frame back in 248 // the days we had adapter frames. When we deoptimize a situation where a 249 // compiled caller calls a compiled caller will have registers it expects 250 // to survive the call to the callee. If we deoptimize the callee the only 251 // way we can restore these registers is to have the oldest interpreter 252 // frame that we create restore these values. That is what this routine 253 // will accomplish. 254 255 // At the moment we have modified c2 to not have any callee save registers 256 // so this problem does not exist and this routine is just a place holder. 257 258 assert(f->is_interpreted_frame(), "must be interpreted"); 259 }