1 /*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2009 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 #ifndef SHARE_VM_SHARK_SHARKNATIVEWRAPPER_HPP
27 #define SHARE_VM_SHARK_SHARKNATIVEWRAPPER_HPP
28
29 #include "runtime/handles.hpp"
30 #include "shark/llvmHeaders.hpp"
31 #include "shark/sharkBuilder.hpp"
32 #include "shark/sharkContext.hpp"
33 #include "shark/sharkInvariants.hpp"
34 #include "shark/sharkStack.hpp"
35
36 class SharkNativeWrapper : public SharkCompileInvariants {
37 friend class SharkStackWithNativeFrame;
38
39 public:
40 static SharkNativeWrapper* build(SharkBuilder* builder,
41 methodHandle target,
42 const char* name,
43 BasicType* arg_types,
44 BasicType return_type) {
45 return new SharkNativeWrapper(builder,
46 target,
47 name,
48 arg_types,
49 return_type);
50 }
51
52 private:
53 SharkNativeWrapper(SharkBuilder* builder,
54 methodHandle target,
55 const char* name,
56 BasicType* arg_types,
57 BasicType return_type)
58 : SharkCompileInvariants(NULL, builder),
59 _target(target),
60 _arg_types(arg_types),
61 _return_type(return_type),
62 _lock_slot_offset(0) { initialize(name); }
63
64 private:
65 void initialize(const char* name);
66
67 private:
68 methodHandle _target;
69 BasicType* _arg_types;
70 BasicType _return_type;
71 llvm::Function* _function;
72 SharkStack* _stack;
73 llvm::Value* _oop_tmp_slot;
74 OopMapSet* _oop_maps;
75 int _receiver_slot_offset;
76 int _lock_slot_offset;
77
78 // The method being compiled.
79 protected:
80 methodHandle target() const {
81 return _target;
82 }
83
84 // Properties of the method.
85 protected:
86 int arg_size() const {
87 return target()->size_of_parameters();
88 }
89 BasicType arg_type(int i) const {
90 return _arg_types[i];
91 }
92 BasicType return_type() const {
93 return _return_type;
94 }
95 bool is_static() const {
96 return target()->is_static();
97 }
98 bool is_synchronized() const {
99 return target()->is_synchronized();
100 }
101 bool is_returning_oop() const {
102 return target()->is_returning_oop();
103 }
104
105 // The LLVM function we are building.
106 public:
107 llvm::Function* function() const {
108 return _function;
109 }
110
111 // The Zero stack and our frame on it.
112 protected:
113 SharkStack* stack() const {
114 return _stack;
115 }
116
117 // Temporary oop storage.
118 protected:
119 llvm::Value* oop_tmp_slot() const {
120 assert(is_static() || is_returning_oop(), "should be");
121 return _oop_tmp_slot;
122 }
123
124 // Information required by nmethod::new_native_nmethod().
125 public:
126 int frame_size() const {
127 return stack()->oopmap_frame_size();
128 }
129 ByteSize receiver_offset() const {
130 return in_ByteSize(_receiver_slot_offset * wordSize);
131 }
132 ByteSize lock_offset() const {
133 return in_ByteSize(_lock_slot_offset * wordSize);
134 }
135 OopMapSet* oop_maps() const {
136 return _oop_maps;
137 }
138
139 // Helpers.
140 private:
141 llvm::BasicBlock* CreateBlock(const char* name = "") const {
142 return llvm::BasicBlock::Create(SharkContext::current(), name, function());
143 }
144 llvm::Value* thread_state_address() const {
145 return builder()->CreateAddressOfStructEntry(
146 thread(), JavaThread::thread_state_offset(),
147 llvm::PointerType::getUnqual(SharkType::jint_type()),
148 "thread_state_address");
149 }
150 llvm::Value* pending_exception_address() const {
151 return builder()->CreateAddressOfStructEntry(
152 thread(), Thread::pending_exception_offset(),
153 llvm::PointerType::getUnqual(SharkType::oop_type()),
154 "pending_exception_address");
155 }
156 void CreateSetThreadState(JavaThreadState state) const {
157 builder()->CreateStore(
158 LLVMValue::jint_constant(state), thread_state_address());
159 }
160 void CreateWriteMemorySerializePage() const {
161 builder()->CreateStore(
162 LLVMValue::jint_constant(1),
163 builder()->CreateIntToPtr(
164 builder()->CreateAdd(
165 LLVMValue::intptr_constant(
166 (intptr_t) os::get_memory_serialize_page()),
167 builder()->CreateAnd(
168 builder()->CreateLShr(
169 builder()->CreatePtrToInt(thread(), SharkType::intptr_type()),
170 LLVMValue::intptr_constant(os::get_serialize_page_shift_count())),
171 LLVMValue::intptr_constant(os::get_serialize_page_mask()))),
172 llvm::PointerType::getUnqual(SharkType::jint_type())));
173 }
174 void CreateResetHandleBlock() const {
175 llvm::Value *active_handles = builder()->CreateValueOfStructEntry(
176 thread(),
177 JavaThread::active_handles_offset(),
178 SharkType::jniHandleBlock_type(),
179 "active_handles");
180 builder()->CreateStore(
181 LLVMValue::intptr_constant(0),
182 builder()->CreateAddressOfStructEntry(
183 active_handles,
184 in_ByteSize(JNIHandleBlock::top_offset_in_bytes()),
185 llvm::PointerType::getUnqual(SharkType::intptr_type()),
186 "top"));
187 }
188 llvm::LoadInst* CreateLoadPendingException() const {
189 return builder()->CreateLoad(
190 pending_exception_address(), "pending_exception");
191 }
192 };
193
194 #endif // SHARE_VM_SHARK_SHARKNATIVEWRAPPER_HPP