Mercurial > hg > truffle
annotate src/share/vm/shark/sharkNativeWrapper.cpp @ 7788:dbbe8ce3bfa5
commands: accept 'server0' as a vm, accept version number which have '-...' suffix (-internal, -ea...)
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 13 Feb 2013 18:33:54 +0100 |
parents | 2cd5e15048e6 |
children |
rev | line source |
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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 } |