Mercurial > hg > graal-compiler
comparison src/share/vm/shark/sharkNativeWrapper.cpp @ 1692:d2ede61b7a12
6976186: integrate Shark HotSpot changes
Summary: Shark is a JIT compiler for Zero that uses the LLVM compiler infrastructure.
Reviewed-by: kvn, twisti
Contributed-by: Gary Benson <gbenson@redhat.com>
author | twisti |
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date | Wed, 11 Aug 2010 05:51:21 -0700 |
parents | |
children | f95d63e2154a |
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1691:4a665be40fd3 | 1692:d2ede61b7a12 |
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1 /* | |
2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved. | |
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 | |
26 #include "incls/_precompiled.incl" | |
27 #include "incls/_sharkNativeWrapper.cpp.incl" | |
28 | |
29 using namespace llvm; | |
30 | |
31 void SharkNativeWrapper::initialize(const char *name) { | |
32 // Create the function | |
33 _function = Function::Create( | |
34 SharkType::entry_point_type(), | |
35 GlobalVariable::InternalLinkage, | |
36 name); | |
37 | |
38 // Get our arguments | |
39 Function::arg_iterator ai = function()->arg_begin(); | |
40 Argument *method = ai++; | |
41 method->setName("method"); | |
42 Argument *base_pc = ai++; | |
43 base_pc->setName("base_pc"); | |
44 code_buffer()->set_base_pc(base_pc); | |
45 Argument *thread = ai++; | |
46 thread->setName("thread"); | |
47 set_thread(thread); | |
48 | |
49 // Create and push our stack frame | |
50 builder()->SetInsertPoint(CreateBlock()); | |
51 _stack = SharkStack::CreateBuildAndPushFrame(this, method); | |
52 NOT_PRODUCT(method = NULL); | |
53 | |
54 // Create the oopmap. We use the one oopmap for every call site in | |
55 // the wrapper, which results in the odd mild inefficiency but is a | |
56 // damn sight easier to code. | |
57 OopMap *oopmap = new OopMap( | |
58 SharkStack::oopmap_slot_munge(stack()->oopmap_frame_size()), | |
59 SharkStack::oopmap_slot_munge(arg_size())); | |
60 oopmap->set_oop(SharkStack::slot2reg(stack()->method_slot_offset())); | |
61 | |
62 // Set up the oop_tmp slot if required: | |
63 // - For static methods we use it to handlize the class argument | |
64 // for the call, and to protect the same during slow path locks | |
65 // (if synchronized). | |
66 // - For methods returning oops, we use it to protect the return | |
67 // value across safepoints or slow path unlocking. | |
68 if (is_static() || is_returning_oop()) { | |
69 _oop_tmp_slot = stack()->slot_addr( | |
70 stack()->oop_tmp_slot_offset(), | |
71 SharkType::oop_type(), | |
72 "oop_tmp_slot"); | |
73 | |
74 oopmap->set_oop(SharkStack::slot2reg(stack()->oop_tmp_slot_offset())); | |
75 } | |
76 | |
77 // Set up the monitor slot, for synchronized methods | |
78 if (is_synchronized()) { | |
79 Unimplemented(); | |
80 _lock_slot_offset = 23; | |
81 } | |
82 | |
83 // Start building the argument list | |
84 std::vector<const Type*> param_types; | |
85 std::vector<Value*> param_values; | |
86 const PointerType *box_type = PointerType::getUnqual(SharkType::oop_type()); | |
87 | |
88 // First argument is the JNIEnv | |
89 param_types.push_back(SharkType::jniEnv_type()); | |
90 param_values.push_back( | |
91 builder()->CreateAddressOfStructEntry( | |
92 thread, | |
93 JavaThread::jni_environment_offset(), | |
94 SharkType::jniEnv_type(), | |
95 "jni_environment")); | |
96 | |
97 // For static methods, the second argument is the class | |
98 if (is_static()) { | |
99 builder()->CreateStore( | |
100 builder()->CreateInlineOop( | |
101 JNIHandles::make_local( | |
102 target()->method_holder()->klass_part()->java_mirror())), | |
103 oop_tmp_slot()); | |
104 | |
105 param_types.push_back(box_type); | |
106 param_values.push_back(oop_tmp_slot()); | |
107 | |
108 _receiver_slot_offset = stack()->oop_tmp_slot_offset(); | |
109 } | |
110 else if (is_returning_oop()) { | |
111 // The oop_tmp slot is registered in the oopmap, | |
112 // so we need to clear it. This is one of the | |
113 // mild inefficiencies I mentioned earlier. | |
114 builder()->CreateStore(LLVMValue::null(), oop_tmp_slot()); | |
115 } | |
116 | |
117 // Parse the arguments | |
118 for (int i = 0; i < arg_size(); i++) { | |
119 int slot_offset = stack()->locals_slots_offset() + arg_size() - 1 - i; | |
120 int adjusted_offset = slot_offset; | |
121 BasicBlock *null, *not_null, *merge; | |
122 Value *box; | |
123 PHINode *phi; | |
124 | |
125 switch (arg_type(i)) { | |
126 case T_VOID: | |
127 break; | |
128 | |
129 case T_OBJECT: | |
130 case T_ARRAY: | |
131 null = CreateBlock("null"); | |
132 not_null = CreateBlock("not_null"); | |
133 merge = CreateBlock("merge"); | |
134 | |
135 box = stack()->slot_addr(slot_offset, SharkType::oop_type()); | |
136 builder()->CreateCondBr( | |
137 builder()->CreateICmp( | |
138 ICmpInst::ICMP_EQ, | |
139 builder()->CreateLoad(box), | |
140 LLVMValue::null()), | |
141 null, not_null); | |
142 | |
143 builder()->SetInsertPoint(null); | |
144 builder()->CreateBr(merge); | |
145 | |
146 builder()->SetInsertPoint(not_null); | |
147 builder()->CreateBr(merge); | |
148 | |
149 builder()->SetInsertPoint(merge); | |
150 phi = builder()->CreatePHI(box_type, "boxed_object"); | |
151 phi->addIncoming(ConstantPointerNull::get(box_type), null); | |
152 phi->addIncoming(box, not_null); | |
153 box = phi; | |
154 | |
155 param_types.push_back(box_type); | |
156 param_values.push_back(box); | |
157 | |
158 oopmap->set_oop(SharkStack::slot2reg(slot_offset)); | |
159 | |
160 if (i == 0 && !is_static()) | |
161 _receiver_slot_offset = slot_offset; | |
162 | |
163 break; | |
164 | |
165 case T_LONG: | |
166 case T_DOUBLE: | |
167 adjusted_offset--; | |
168 // fall through | |
169 | |
170 default: | |
171 const Type *param_type = SharkType::to_stackType(arg_type(i)); | |
172 | |
173 param_types.push_back(param_type); | |
174 param_values.push_back( | |
175 builder()->CreateLoad(stack()->slot_addr(adjusted_offset, param_type))); | |
176 } | |
177 } | |
178 | |
179 // The oopmap is now complete, and everything is written | |
180 // into the frame except the PC. | |
181 int pc_offset = code_buffer()->create_unique_offset(); | |
182 | |
183 _oop_maps = new OopMapSet(); | |
184 oop_maps()->add_gc_map(pc_offset, oopmap); | |
185 | |
186 builder()->CreateStore( | |
187 builder()->code_buffer_address(pc_offset), | |
188 stack()->slot_addr(stack()->pc_slot_offset())); | |
189 | |
190 // Set up the Java frame anchor | |
191 stack()->CreateSetLastJavaFrame(); | |
192 | |
193 // Lock if necessary | |
194 if (is_synchronized()) | |
195 Unimplemented(); | |
196 | |
197 // Change the thread state to _thread_in_native | |
198 CreateSetThreadState(_thread_in_native); | |
199 | |
200 // Make the call | |
201 BasicType result_type = target()->result_type(); | |
202 const Type* return_type; | |
203 if (result_type == T_VOID) | |
204 return_type = SharkType::void_type(); | |
205 else if (is_returning_oop()) | |
206 return_type = box_type; | |
207 else | |
208 return_type = SharkType::to_arrayType(result_type); | |
209 Value* native_function = builder()->CreateIntToPtr( | |
210 LLVMValue::intptr_constant((intptr_t) target()->native_function()), | |
211 PointerType::getUnqual( | |
212 FunctionType::get(return_type, param_types, false))); | |
213 Value *result = builder()->CreateCall( | |
214 native_function, param_values.begin(), param_values.end()); | |
215 | |
216 // Start the transition back to _thread_in_Java | |
217 CreateSetThreadState(_thread_in_native_trans); | |
218 | |
219 // Make sure new state is visible in the GC thread | |
220 if (os::is_MP()) { | |
221 if (UseMembar) | |
222 builder()->CreateMemoryBarrier(SharkBuilder::BARRIER_STORELOAD); | |
223 else | |
224 CreateWriteMemorySerializePage(); | |
225 } | |
226 | |
227 // Handle safepoint operations, pending suspend requests, | |
228 // and pending asynchronous exceptions. | |
229 BasicBlock *check_thread = CreateBlock("check_thread"); | |
230 BasicBlock *do_safepoint = CreateBlock("do_safepoint"); | |
231 BasicBlock *safepointed = CreateBlock("safepointed"); | |
232 | |
233 Value *global_state = builder()->CreateLoad( | |
234 builder()->CreateIntToPtr( | |
235 LLVMValue::intptr_constant( | |
236 (intptr_t) SafepointSynchronize::address_of_state()), | |
237 PointerType::getUnqual(SharkType::jint_type())), | |
238 "global_state"); | |
239 | |
240 builder()->CreateCondBr( | |
241 builder()->CreateICmpNE( | |
242 global_state, | |
243 LLVMValue::jint_constant(SafepointSynchronize::_not_synchronized)), | |
244 do_safepoint, check_thread); | |
245 | |
246 builder()->SetInsertPoint(check_thread); | |
247 Value *thread_state = builder()->CreateValueOfStructEntry( | |
248 thread, | |
249 JavaThread::suspend_flags_offset(), | |
250 SharkType::jint_type(), | |
251 "thread_state"); | |
252 | |
253 builder()->CreateCondBr( | |
254 builder()->CreateICmpNE( | |
255 thread_state, | |
256 LLVMValue::jint_constant(0)), | |
257 do_safepoint, safepointed); | |
258 | |
259 builder()->SetInsertPoint(do_safepoint); | |
260 builder()->CreateCall( | |
261 builder()->check_special_condition_for_native_trans(), thread); | |
262 builder()->CreateBr(safepointed); | |
263 | |
264 // Finally we can change the thread state to _thread_in_Java | |
265 builder()->SetInsertPoint(safepointed); | |
266 CreateSetThreadState(_thread_in_Java); | |
267 | |
268 // Clear the frame anchor | |
269 stack()->CreateResetLastJavaFrame(); | |
270 | |
271 // If there is a pending exception then we can just unwind and | |
272 // return. It seems totally wrong that unlocking is skipped here | |
273 // but apparently the template interpreter does this so we do too. | |
274 BasicBlock *exception = CreateBlock("exception"); | |
275 BasicBlock *no_exception = CreateBlock("no_exception"); | |
276 | |
277 builder()->CreateCondBr( | |
278 builder()->CreateICmpEQ( | |
279 CreateLoadPendingException(), | |
280 LLVMValue::null()), | |
281 no_exception, exception); | |
282 | |
283 builder()->SetInsertPoint(exception); | |
284 CreateResetHandleBlock(); | |
285 stack()->CreatePopFrame(0); | |
286 builder()->CreateRet(LLVMValue::jint_constant(0)); | |
287 | |
288 builder()->SetInsertPoint(no_exception); | |
289 | |
290 // If the result was an oop then unbox it before | |
291 // releasing the handle it might be protected by | |
292 if (is_returning_oop()) { | |
293 BasicBlock *null = builder()->GetInsertBlock(); | |
294 BasicBlock *not_null = CreateBlock("not_null"); | |
295 BasicBlock *merge = CreateBlock("merge"); | |
296 | |
297 builder()->CreateCondBr( | |
298 builder()->CreateICmpNE(result, ConstantPointerNull::get(box_type)), | |
299 not_null, merge); | |
300 | |
301 builder()->SetInsertPoint(not_null); | |
302 Value *unboxed_result = builder()->CreateLoad(result); | |
303 builder()->CreateBr(merge); | |
304 | |
305 builder()->SetInsertPoint(merge); | |
306 PHINode *phi = builder()->CreatePHI(SharkType::oop_type(), "result"); | |
307 phi->addIncoming(LLVMValue::null(), null); | |
308 phi->addIncoming(unboxed_result, not_null); | |
309 result = phi; | |
310 } | |
311 | |
312 // Reset handle block | |
313 CreateResetHandleBlock(); | |
314 | |
315 // Unlock if necessary. | |
316 if (is_synchronized()) | |
317 Unimplemented(); | |
318 | |
319 // Unwind and return | |
320 Value *result_addr = stack()->CreatePopFrame(type2size[result_type]); | |
321 if (result_type != T_VOID) { | |
322 bool needs_cast = false; | |
323 bool is_signed = false; | |
324 switch (result_type) { | |
325 case T_BOOLEAN: | |
326 result = builder()->CreateICmpNE(result, LLVMValue::jbyte_constant(0)); | |
327 needs_cast = true; | |
328 break; | |
329 | |
330 case T_CHAR: | |
331 needs_cast = true; | |
332 break; | |
333 | |
334 case T_BYTE: | |
335 case T_SHORT: | |
336 needs_cast = true; | |
337 is_signed = true; | |
338 break; | |
339 } | |
340 if (needs_cast) { | |
341 result = builder()->CreateIntCast( | |
342 result, SharkType::to_stackType(result_type), is_signed); | |
343 } | |
344 | |
345 builder()->CreateStore( | |
346 result, | |
347 builder()->CreateIntToPtr( | |
348 result_addr, | |
349 PointerType::getUnqual(SharkType::to_stackType(result_type)))); | |
350 } | |
351 builder()->CreateRet(LLVMValue::jint_constant(0)); | |
352 } |