Mercurial > hg > truffle
annotate src/share/vm/shark/sharkNativeWrapper.cpp @ 4117:a04a201f0f5a
7108383: JSR 292: JRuby bench_define_method_methods.rb: assert(slow_jvms != NULL) failed: miss path must not
Reviewed-by: kvn, never
author | twisti |
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date | Thu, 17 Nov 2011 04:07:30 -0800 |
parents | 1d1603768966 |
children | 2cd5e15048e6 |
rev | line source |
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1692 | 1 /* |
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7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
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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 oopmap->set_oop(SharkStack::slot2reg(stack()->method_slot_offset())); | |
63 | |
64 // Set up the oop_tmp slot if required: | |
65 // - For static methods we use it to handlize the class argument | |
66 // for the call, and to protect the same during slow path locks | |
67 // (if synchronized). | |
68 // - For methods returning oops, we use it to protect the return | |
69 // value across safepoints or slow path unlocking. | |
70 if (is_static() || is_returning_oop()) { | |
71 _oop_tmp_slot = stack()->slot_addr( | |
72 stack()->oop_tmp_slot_offset(), | |
73 SharkType::oop_type(), | |
74 "oop_tmp_slot"); | |
75 | |
76 oopmap->set_oop(SharkStack::slot2reg(stack()->oop_tmp_slot_offset())); | |
77 } | |
78 | |
79 // Set up the monitor slot, for synchronized methods | |
80 if (is_synchronized()) { | |
81 Unimplemented(); | |
82 _lock_slot_offset = 23; | |
83 } | |
84 | |
85 // Start building the argument list | |
86 std::vector<const Type*> param_types; | |
87 std::vector<Value*> param_values; | |
88 const PointerType *box_type = PointerType::getUnqual(SharkType::oop_type()); | |
89 | |
90 // First argument is the JNIEnv | |
91 param_types.push_back(SharkType::jniEnv_type()); | |
92 param_values.push_back( | |
93 builder()->CreateAddressOfStructEntry( | |
94 thread, | |
95 JavaThread::jni_environment_offset(), | |
96 SharkType::jniEnv_type(), | |
97 "jni_environment")); | |
98 | |
99 // For static methods, the second argument is the class | |
100 if (is_static()) { | |
101 builder()->CreateStore( | |
102 builder()->CreateInlineOop( | |
103 JNIHandles::make_local( | |
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104 target()->method_holder()->java_mirror())), |
1692 | 105 oop_tmp_slot()); |
106 | |
107 param_types.push_back(box_type); | |
108 param_values.push_back(oop_tmp_slot()); | |
109 | |
110 _receiver_slot_offset = stack()->oop_tmp_slot_offset(); | |
111 } | |
112 else if (is_returning_oop()) { | |
113 // The oop_tmp slot is registered in the oopmap, | |
114 // so we need to clear it. This is one of the | |
115 // mild inefficiencies I mentioned earlier. | |
116 builder()->CreateStore(LLVMValue::null(), oop_tmp_slot()); | |
117 } | |
118 | |
119 // Parse the arguments | |
120 for (int i = 0; i < arg_size(); i++) { | |
121 int slot_offset = stack()->locals_slots_offset() + arg_size() - 1 - i; | |
122 int adjusted_offset = slot_offset; | |
123 BasicBlock *null, *not_null, *merge; | |
124 Value *box; | |
125 PHINode *phi; | |
126 | |
127 switch (arg_type(i)) { | |
128 case T_VOID: | |
129 break; | |
130 | |
131 case T_OBJECT: | |
132 case T_ARRAY: | |
133 null = CreateBlock("null"); | |
134 not_null = CreateBlock("not_null"); | |
135 merge = CreateBlock("merge"); | |
136 | |
137 box = stack()->slot_addr(slot_offset, SharkType::oop_type()); | |
138 builder()->CreateCondBr( | |
139 builder()->CreateICmp( | |
140 ICmpInst::ICMP_EQ, | |
141 builder()->CreateLoad(box), | |
142 LLVMValue::null()), | |
143 null, not_null); | |
144 | |
145 builder()->SetInsertPoint(null); | |
146 builder()->CreateBr(merge); | |
147 | |
148 builder()->SetInsertPoint(not_null); | |
149 builder()->CreateBr(merge); | |
150 | |
151 builder()->SetInsertPoint(merge); | |
152 phi = builder()->CreatePHI(box_type, "boxed_object"); | |
153 phi->addIncoming(ConstantPointerNull::get(box_type), null); | |
154 phi->addIncoming(box, not_null); | |
155 box = phi; | |
156 | |
157 param_types.push_back(box_type); | |
158 param_values.push_back(box); | |
159 | |
160 oopmap->set_oop(SharkStack::slot2reg(slot_offset)); | |
161 | |
162 if (i == 0 && !is_static()) | |
163 _receiver_slot_offset = slot_offset; | |
164 | |
165 break; | |
166 | |
167 case T_LONG: | |
168 case T_DOUBLE: | |
169 adjusted_offset--; | |
170 // fall through | |
171 | |
172 default: | |
173 const Type *param_type = SharkType::to_stackType(arg_type(i)); | |
174 | |
175 param_types.push_back(param_type); | |
176 param_values.push_back( | |
177 builder()->CreateLoad(stack()->slot_addr(adjusted_offset, param_type))); | |
178 } | |
179 } | |
180 | |
181 // The oopmap is now complete, and everything is written | |
182 // into the frame except the PC. | |
183 int pc_offset = code_buffer()->create_unique_offset(); | |
184 | |
185 _oop_maps = new OopMapSet(); | |
186 oop_maps()->add_gc_map(pc_offset, oopmap); | |
187 | |
188 builder()->CreateStore( | |
189 builder()->code_buffer_address(pc_offset), | |
190 stack()->slot_addr(stack()->pc_slot_offset())); | |
191 | |
192 // Set up the Java frame anchor | |
193 stack()->CreateSetLastJavaFrame(); | |
194 | |
195 // Lock if necessary | |
196 if (is_synchronized()) | |
197 Unimplemented(); | |
198 | |
199 // Change the thread state to _thread_in_native | |
200 CreateSetThreadState(_thread_in_native); | |
201 | |
202 // Make the call | |
203 BasicType result_type = target()->result_type(); | |
204 const Type* return_type; | |
205 if (result_type == T_VOID) | |
206 return_type = SharkType::void_type(); | |
207 else if (is_returning_oop()) | |
208 return_type = box_type; | |
209 else | |
210 return_type = SharkType::to_arrayType(result_type); | |
211 Value* native_function = builder()->CreateIntToPtr( | |
212 LLVMValue::intptr_constant((intptr_t) target()->native_function()), | |
213 PointerType::getUnqual( | |
214 FunctionType::get(return_type, param_types, false))); | |
215 Value *result = builder()->CreateCall( | |
216 native_function, param_values.begin(), param_values.end()); | |
217 | |
218 // Start the transition back to _thread_in_Java | |
219 CreateSetThreadState(_thread_in_native_trans); | |
220 | |
221 // Make sure new state is visible in the GC thread | |
222 if (os::is_MP()) { | |
223 if (UseMembar) | |
224 builder()->CreateMemoryBarrier(SharkBuilder::BARRIER_STORELOAD); | |
225 else | |
226 CreateWriteMemorySerializePage(); | |
227 } | |
228 | |
229 // Handle safepoint operations, pending suspend requests, | |
230 // and pending asynchronous exceptions. | |
231 BasicBlock *check_thread = CreateBlock("check_thread"); | |
232 BasicBlock *do_safepoint = CreateBlock("do_safepoint"); | |
233 BasicBlock *safepointed = CreateBlock("safepointed"); | |
234 | |
235 Value *global_state = builder()->CreateLoad( | |
236 builder()->CreateIntToPtr( | |
237 LLVMValue::intptr_constant( | |
238 (intptr_t) SafepointSynchronize::address_of_state()), | |
239 PointerType::getUnqual(SharkType::jint_type())), | |
240 "global_state"); | |
241 | |
242 builder()->CreateCondBr( | |
243 builder()->CreateICmpNE( | |
244 global_state, | |
245 LLVMValue::jint_constant(SafepointSynchronize::_not_synchronized)), | |
246 do_safepoint, check_thread); | |
247 | |
248 builder()->SetInsertPoint(check_thread); | |
249 Value *thread_state = builder()->CreateValueOfStructEntry( | |
250 thread, | |
251 JavaThread::suspend_flags_offset(), | |
252 SharkType::jint_type(), | |
253 "thread_state"); | |
254 | |
255 builder()->CreateCondBr( | |
256 builder()->CreateICmpNE( | |
257 thread_state, | |
258 LLVMValue::jint_constant(0)), | |
259 do_safepoint, safepointed); | |
260 | |
261 builder()->SetInsertPoint(do_safepoint); | |
262 builder()->CreateCall( | |
263 builder()->check_special_condition_for_native_trans(), thread); | |
264 builder()->CreateBr(safepointed); | |
265 | |
266 // Finally we can change the thread state to _thread_in_Java | |
267 builder()->SetInsertPoint(safepointed); | |
268 CreateSetThreadState(_thread_in_Java); | |
269 | |
270 // Clear the frame anchor | |
271 stack()->CreateResetLastJavaFrame(); | |
272 | |
273 // If there is a pending exception then we can just unwind and | |
274 // return. It seems totally wrong that unlocking is skipped here | |
275 // but apparently the template interpreter does this so we do too. | |
276 BasicBlock *exception = CreateBlock("exception"); | |
277 BasicBlock *no_exception = CreateBlock("no_exception"); | |
278 | |
279 builder()->CreateCondBr( | |
280 builder()->CreateICmpEQ( | |
281 CreateLoadPendingException(), | |
282 LLVMValue::null()), | |
283 no_exception, exception); | |
284 | |
285 builder()->SetInsertPoint(exception); | |
286 CreateResetHandleBlock(); | |
287 stack()->CreatePopFrame(0); | |
288 builder()->CreateRet(LLVMValue::jint_constant(0)); | |
289 | |
290 builder()->SetInsertPoint(no_exception); | |
291 | |
292 // If the result was an oop then unbox it before | |
293 // releasing the handle it might be protected by | |
294 if (is_returning_oop()) { | |
295 BasicBlock *null = builder()->GetInsertBlock(); | |
296 BasicBlock *not_null = CreateBlock("not_null"); | |
297 BasicBlock *merge = CreateBlock("merge"); | |
298 | |
299 builder()->CreateCondBr( | |
300 builder()->CreateICmpNE(result, ConstantPointerNull::get(box_type)), | |
301 not_null, merge); | |
302 | |
303 builder()->SetInsertPoint(not_null); | |
304 Value *unboxed_result = builder()->CreateLoad(result); | |
305 builder()->CreateBr(merge); | |
306 | |
307 builder()->SetInsertPoint(merge); | |
308 PHINode *phi = builder()->CreatePHI(SharkType::oop_type(), "result"); | |
309 phi->addIncoming(LLVMValue::null(), null); | |
310 phi->addIncoming(unboxed_result, not_null); | |
311 result = phi; | |
312 } | |
313 | |
314 // Reset handle block | |
315 CreateResetHandleBlock(); | |
316 | |
317 // Unlock if necessary. | |
318 if (is_synchronized()) | |
319 Unimplemented(); | |
320 | |
321 // Unwind and return | |
322 Value *result_addr = stack()->CreatePopFrame(type2size[result_type]); | |
323 if (result_type != T_VOID) { | |
324 bool needs_cast = false; | |
325 bool is_signed = false; | |
326 switch (result_type) { | |
327 case T_BOOLEAN: | |
328 result = builder()->CreateICmpNE(result, LLVMValue::jbyte_constant(0)); | |
329 needs_cast = true; | |
330 break; | |
331 | |
332 case T_CHAR: | |
333 needs_cast = true; | |
334 break; | |
335 | |
336 case T_BYTE: | |
337 case T_SHORT: | |
338 needs_cast = true; | |
339 is_signed = true; | |
340 break; | |
341 } | |
342 if (needs_cast) { | |
343 result = builder()->CreateIntCast( | |
344 result, SharkType::to_stackType(result_type), is_signed); | |
345 } | |
346 | |
347 builder()->CreateStore( | |
348 result, | |
349 builder()->CreateIntToPtr( | |
350 result_addr, | |
351 PointerType::getUnqual(SharkType::to_stackType(result_type)))); | |
352 } | |
353 builder()->CreateRet(LLVMValue::jint_constant(0)); | |
354 } |