Mercurial > hg > truffle
annotate src/share/vm/shark/sharkNativeWrapper.cpp @ 7212:291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Fri, 14 Dec 2012 14:35:13 +0100 |
| parents | 2cd5e15048e6 |
| children |
| rev | line source |
|---|---|
| 1692 | 1 /* |
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
| 1692 | 3 * Copyright 2009, 2010 Red Hat, Inc. |
| 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 5 * | |
| 6 * This code is free software; you can redistribute it and/or modify it | |
| 7 * under the terms of the GNU General Public License version 2 only, as | |
| 8 * published by the Free Software Foundation. | |
| 9 * | |
| 10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 13 * version 2 for more details (a copy is included in the LICENSE file that | |
| 14 * accompanied this code). | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License version | |
| 17 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 19 * | |
| 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 21 * or visit www.oracle.com if you need additional information or have any | |
| 22 * questions. | |
| 23 * | |
| 24 */ | |
| 25 | |
| 1972 | 26 #include "precompiled.hpp" |
| 27 #include "shark/llvmHeaders.hpp" | |
| 28 #include "shark/sharkNativeWrapper.hpp" | |
| 29 #include "shark/sharkType.hpp" | |
| 1692 | 30 |
| 31 using namespace llvm; | |
| 32 | |
| 33 void SharkNativeWrapper::initialize(const char *name) { | |
| 34 // Create the function | |
| 35 _function = Function::Create( | |
| 36 SharkType::entry_point_type(), | |
| 37 GlobalVariable::InternalLinkage, | |
| 38 name); | |
| 39 | |
| 40 // Get our arguments | |
| 41 Function::arg_iterator ai = function()->arg_begin(); | |
| 42 Argument *method = ai++; | |
| 43 method->setName("method"); | |
| 44 Argument *base_pc = ai++; | |
| 45 base_pc->setName("base_pc"); | |
| 46 code_buffer()->set_base_pc(base_pc); | |
| 47 Argument *thread = ai++; | |
| 48 thread->setName("thread"); | |
| 49 set_thread(thread); | |
| 50 | |
| 51 // Create and push our stack frame | |
| 52 builder()->SetInsertPoint(CreateBlock()); | |
| 53 _stack = SharkStack::CreateBuildAndPushFrame(this, method); | |
| 54 NOT_PRODUCT(method = NULL); | |
| 55 | |
| 56 // Create the oopmap. We use the one oopmap for every call site in | |
| 57 // the wrapper, which results in the odd mild inefficiency but is a | |
| 58 // damn sight easier to code. | |
| 59 OopMap *oopmap = new OopMap( | |
| 60 SharkStack::oopmap_slot_munge(stack()->oopmap_frame_size()), | |
| 61 SharkStack::oopmap_slot_munge(arg_size())); | |
| 62 | |
| 63 // Set up the oop_tmp slot if required: | |
| 64 // - For static methods we use it to handlize the class argument | |
| 65 // for the call, and to protect the same during slow path locks | |
| 66 // (if synchronized). | |
| 67 // - For methods returning oops, we use it to protect the return | |
| 68 // value across safepoints or slow path unlocking. | |
| 69 if (is_static() || is_returning_oop()) { | |
| 70 _oop_tmp_slot = stack()->slot_addr( | |
| 71 stack()->oop_tmp_slot_offset(), | |
| 72 SharkType::oop_type(), | |
| 73 "oop_tmp_slot"); | |
| 74 | |
| 75 oopmap->set_oop(SharkStack::slot2reg(stack()->oop_tmp_slot_offset())); | |
| 76 } | |
| 77 | |
| 78 // Set up the monitor slot, for synchronized methods | |
| 79 if (is_synchronized()) { | |
| 80 Unimplemented(); | |
| 81 _lock_slot_offset = 23; | |
| 82 } | |
| 83 | |
| 84 // Start building the argument list | |
| 7195 | 85 std::vector<Type*> param_types; |
| 1692 | 86 std::vector<Value*> param_values; |
| 7195 | 87 PointerType *box_type = PointerType::getUnqual(SharkType::oop_type()); |
| 1692 | 88 |
| 89 // First argument is the JNIEnv | |
| 90 param_types.push_back(SharkType::jniEnv_type()); | |
| 91 param_values.push_back( | |
| 92 builder()->CreateAddressOfStructEntry( | |
| 93 thread, | |
| 94 JavaThread::jni_environment_offset(), | |
| 95 SharkType::jniEnv_type(), | |
| 96 "jni_environment")); | |
| 97 | |
| 98 // For static methods, the second argument is the class | |
| 99 if (is_static()) { | |
| 100 builder()->CreateStore( | |
| 101 builder()->CreateInlineOop( | |
| 102 JNIHandles::make_local( | |
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103 target()->method_holder()->java_mirror())), |
| 1692 | 104 oop_tmp_slot()); |
| 105 | |
| 106 param_types.push_back(box_type); | |
| 107 param_values.push_back(oop_tmp_slot()); | |
| 108 | |
| 109 _receiver_slot_offset = stack()->oop_tmp_slot_offset(); | |
| 110 } | |
| 111 else if (is_returning_oop()) { | |
| 112 // The oop_tmp slot is registered in the oopmap, | |
| 113 // so we need to clear it. This is one of the | |
| 114 // mild inefficiencies I mentioned earlier. | |
| 115 builder()->CreateStore(LLVMValue::null(), oop_tmp_slot()); | |
| 116 } | |
| 117 | |
| 118 // Parse the arguments | |
| 119 for (int i = 0; i < arg_size(); i++) { | |
| 120 int slot_offset = stack()->locals_slots_offset() + arg_size() - 1 - i; | |
| 121 int adjusted_offset = slot_offset; | |
| 122 BasicBlock *null, *not_null, *merge; | |
| 123 Value *box; | |
| 124 PHINode *phi; | |
| 125 | |
| 126 switch (arg_type(i)) { | |
| 127 case T_VOID: | |
| 128 break; | |
| 129 | |
| 130 case T_OBJECT: | |
| 131 case T_ARRAY: | |
| 132 null = CreateBlock("null"); | |
| 133 not_null = CreateBlock("not_null"); | |
| 134 merge = CreateBlock("merge"); | |
| 135 | |
| 136 box = stack()->slot_addr(slot_offset, SharkType::oop_type()); | |
| 137 builder()->CreateCondBr( | |
| 138 builder()->CreateICmp( | |
| 139 ICmpInst::ICMP_EQ, | |
| 140 builder()->CreateLoad(box), | |
| 141 LLVMValue::null()), | |
| 142 null, not_null); | |
| 143 | |
| 144 builder()->SetInsertPoint(null); | |
| 145 builder()->CreateBr(merge); | |
| 146 | |
| 147 builder()->SetInsertPoint(not_null); | |
| 148 builder()->CreateBr(merge); | |
| 149 | |
| 150 builder()->SetInsertPoint(merge); | |
| 7195 | 151 phi = builder()->CreatePHI(box_type, 0, "boxed_object"); |
| 1692 | 152 phi->addIncoming(ConstantPointerNull::get(box_type), null); |
| 153 phi->addIncoming(box, not_null); | |
| 154 box = phi; | |
| 155 | |
| 156 param_types.push_back(box_type); | |
| 157 param_values.push_back(box); | |
| 158 | |
| 159 oopmap->set_oop(SharkStack::slot2reg(slot_offset)); | |
| 160 | |
| 161 if (i == 0 && !is_static()) | |
| 162 _receiver_slot_offset = slot_offset; | |
| 163 | |
| 164 break; | |
| 165 | |
| 166 case T_LONG: | |
| 167 case T_DOUBLE: | |
| 168 adjusted_offset--; | |
| 169 // fall through | |
| 170 | |
| 171 default: | |
| 7195 | 172 Type *param_type = SharkType::to_stackType(arg_type(i)); |
| 1692 | 173 |
| 174 param_types.push_back(param_type); | |
| 175 param_values.push_back( | |
| 176 builder()->CreateLoad(stack()->slot_addr(adjusted_offset, param_type))); | |
| 177 } | |
| 178 } | |
| 179 | |
| 180 // The oopmap is now complete, and everything is written | |
| 181 // into the frame except the PC. | |
| 182 int pc_offset = code_buffer()->create_unique_offset(); | |
| 183 | |
| 184 _oop_maps = new OopMapSet(); | |
| 185 oop_maps()->add_gc_map(pc_offset, oopmap); | |
| 186 | |
| 187 builder()->CreateStore( | |
| 188 builder()->code_buffer_address(pc_offset), | |
| 189 stack()->slot_addr(stack()->pc_slot_offset())); | |
| 190 | |
| 191 // Set up the Java frame anchor | |
| 192 stack()->CreateSetLastJavaFrame(); | |
| 193 | |
| 194 // Lock if necessary | |
| 195 if (is_synchronized()) | |
| 196 Unimplemented(); | |
| 197 | |
| 198 // Change the thread state to _thread_in_native | |
| 199 CreateSetThreadState(_thread_in_native); | |
| 200 | |
| 201 // Make the call | |
| 202 BasicType result_type = target()->result_type(); | |
| 7195 | 203 Type* return_type; |
| 1692 | 204 if (result_type == T_VOID) |
| 205 return_type = SharkType::void_type(); | |
| 206 else if (is_returning_oop()) | |
| 207 return_type = box_type; | |
| 208 else | |
| 209 return_type = SharkType::to_arrayType(result_type); | |
| 210 Value* native_function = builder()->CreateIntToPtr( | |
| 211 LLVMValue::intptr_constant((intptr_t) target()->native_function()), | |
| 212 PointerType::getUnqual( | |
| 213 FunctionType::get(return_type, param_types, false))); | |
| 214 Value *result = builder()->CreateCall( | |
| 7195 | 215 native_function, llvm::makeArrayRef(param_values)); |
| 1692 | 216 |
| 217 // Start the transition back to _thread_in_Java | |
| 218 CreateSetThreadState(_thread_in_native_trans); | |
| 219 | |
| 220 // Make sure new state is visible in the GC thread | |
| 221 if (os::is_MP()) { | |
| 222 if (UseMembar) | |
| 7195 | 223 builder()->CreateFence(llvm::SequentiallyConsistent, llvm::CrossThread); |
| 1692 | 224 else |
| 225 CreateWriteMemorySerializePage(); | |
| 226 } | |
| 227 | |
| 228 // Handle safepoint operations, pending suspend requests, | |
| 229 // and pending asynchronous exceptions. | |
| 230 BasicBlock *check_thread = CreateBlock("check_thread"); | |
| 231 BasicBlock *do_safepoint = CreateBlock("do_safepoint"); | |
| 232 BasicBlock *safepointed = CreateBlock("safepointed"); | |
| 233 | |
| 234 Value *global_state = builder()->CreateLoad( | |
| 235 builder()->CreateIntToPtr( | |
| 236 LLVMValue::intptr_constant( | |
| 237 (intptr_t) SafepointSynchronize::address_of_state()), | |
| 238 PointerType::getUnqual(SharkType::jint_type())), | |
| 239 "global_state"); | |
| 240 | |
| 241 builder()->CreateCondBr( | |
| 242 builder()->CreateICmpNE( | |
| 243 global_state, | |
| 244 LLVMValue::jint_constant(SafepointSynchronize::_not_synchronized)), | |
| 245 do_safepoint, check_thread); | |
| 246 | |
| 247 builder()->SetInsertPoint(check_thread); | |
| 248 Value *thread_state = builder()->CreateValueOfStructEntry( | |
| 249 thread, | |
| 250 JavaThread::suspend_flags_offset(), | |
| 251 SharkType::jint_type(), | |
| 252 "thread_state"); | |
| 253 | |
| 254 builder()->CreateCondBr( | |
| 255 builder()->CreateICmpNE( | |
| 256 thread_state, | |
| 257 LLVMValue::jint_constant(0)), | |
| 258 do_safepoint, safepointed); | |
| 259 | |
| 260 builder()->SetInsertPoint(do_safepoint); | |
| 261 builder()->CreateCall( | |
| 262 builder()->check_special_condition_for_native_trans(), thread); | |
| 263 builder()->CreateBr(safepointed); | |
| 264 | |
| 265 // Finally we can change the thread state to _thread_in_Java | |
| 266 builder()->SetInsertPoint(safepointed); | |
| 267 CreateSetThreadState(_thread_in_Java); | |
| 268 | |
| 269 // Clear the frame anchor | |
| 270 stack()->CreateResetLastJavaFrame(); | |
| 271 | |
| 272 // If there is a pending exception then we can just unwind and | |
| 273 // return. It seems totally wrong that unlocking is skipped here | |
| 274 // but apparently the template interpreter does this so we do too. | |
| 275 BasicBlock *exception = CreateBlock("exception"); | |
| 276 BasicBlock *no_exception = CreateBlock("no_exception"); | |
| 277 | |
| 278 builder()->CreateCondBr( | |
| 279 builder()->CreateICmpEQ( | |
| 280 CreateLoadPendingException(), | |
| 281 LLVMValue::null()), | |
| 282 no_exception, exception); | |
| 283 | |
| 284 builder()->SetInsertPoint(exception); | |
| 285 CreateResetHandleBlock(); | |
| 286 stack()->CreatePopFrame(0); | |
| 287 builder()->CreateRet(LLVMValue::jint_constant(0)); | |
| 288 | |
| 289 builder()->SetInsertPoint(no_exception); | |
| 290 | |
| 291 // If the result was an oop then unbox it before | |
| 292 // releasing the handle it might be protected by | |
| 293 if (is_returning_oop()) { | |
| 294 BasicBlock *null = builder()->GetInsertBlock(); | |
| 295 BasicBlock *not_null = CreateBlock("not_null"); | |
| 296 BasicBlock *merge = CreateBlock("merge"); | |
| 297 | |
| 298 builder()->CreateCondBr( | |
| 299 builder()->CreateICmpNE(result, ConstantPointerNull::get(box_type)), | |
| 300 not_null, merge); | |
| 301 | |
| 302 builder()->SetInsertPoint(not_null); | |
| 303 Value *unboxed_result = builder()->CreateLoad(result); | |
| 304 builder()->CreateBr(merge); | |
| 305 | |
| 306 builder()->SetInsertPoint(merge); | |
| 7195 | 307 PHINode *phi = builder()->CreatePHI(SharkType::oop_type(), 0, "result"); |
| 1692 | 308 phi->addIncoming(LLVMValue::null(), null); |
| 309 phi->addIncoming(unboxed_result, not_null); | |
| 310 result = phi; | |
| 311 } | |
| 312 | |
| 313 // Reset handle block | |
| 314 CreateResetHandleBlock(); | |
| 315 | |
| 316 // Unlock if necessary. | |
| 317 if (is_synchronized()) | |
| 318 Unimplemented(); | |
| 319 | |
| 320 // Unwind and return | |
| 321 Value *result_addr = stack()->CreatePopFrame(type2size[result_type]); | |
| 322 if (result_type != T_VOID) { | |
| 323 bool needs_cast = false; | |
| 324 bool is_signed = false; | |
| 325 switch (result_type) { | |
| 326 case T_BOOLEAN: | |
| 327 result = builder()->CreateICmpNE(result, LLVMValue::jbyte_constant(0)); | |
| 328 needs_cast = true; | |
| 329 break; | |
| 330 | |
| 331 case T_CHAR: | |
| 332 needs_cast = true; | |
| 333 break; | |
| 334 | |
| 335 case T_BYTE: | |
| 336 case T_SHORT: | |
| 337 needs_cast = true; | |
| 338 is_signed = true; | |
| 339 break; | |
| 340 } | |
| 341 if (needs_cast) { | |
| 342 result = builder()->CreateIntCast( | |
| 343 result, SharkType::to_stackType(result_type), is_signed); | |
| 344 } | |
| 345 | |
| 346 builder()->CreateStore( | |
| 347 result, | |
| 348 builder()->CreateIntToPtr( | |
| 349 result_addr, | |
| 350 PointerType::getUnqual(SharkType::to_stackType(result_type)))); | |
| 351 } | |
| 352 builder()->CreateRet(LLVMValue::jint_constant(0)); | |
| 353 } |