1 /*
2 * Copyright (c) 1999, 2007, 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 class SharkNativeWrapper : public SharkCompileInvariants {
27 friend class SharkStackWithNativeFrame;
28
29 public:
30 static SharkNativeWrapper* build(SharkBuilder* builder,
31 methodHandle target,
32 const char* name,
33 BasicType* arg_types,
34 BasicType return_type) {
35 return new SharkNativeWrapper(builder,
36 target,
37 name,
38 arg_types,
39 return_type);
40 }
41
42 private:
43 SharkNativeWrapper(SharkBuilder* builder,
44 methodHandle target,
45 const char* name,
46 BasicType* arg_types,
47 BasicType return_type)
48 : SharkCompileInvariants(NULL, builder),
49 _target(target),
50 _arg_types(arg_types),
51 _return_type(return_type),
52 _lock_slot_offset(0) { initialize(name); }
53
54 private:
55 void initialize(const char* name);
56
57 private:
58 methodHandle _target;
59 BasicType* _arg_types;
60 BasicType _return_type;
61 llvm::Function* _function;
62 SharkStack* _stack;
63 llvm::Value* _oop_tmp_slot;
64 OopMapSet* _oop_maps;
65 int _receiver_slot_offset;
66 int _lock_slot_offset;
67
68 // The method being compiled.
69 protected:
70 methodHandle target() const {
71 return _target;
72 }
73
74 // Properties of the method.
75 protected:
76 int arg_size() const {
77 return target()->size_of_parameters();
78 }
79 BasicType arg_type(int i) const {
80 return _arg_types[i];
81 }
82 BasicType return_type() const {
83 return _return_type;
84 }
85 bool is_static() const {
86 return target()->is_static();
87 }
88 bool is_synchronized() const {
89 return target()->is_synchronized();
90 }
91 bool is_returning_oop() const {
92 return target()->is_returning_oop();
93 }
94
95 // The LLVM function we are building.
96 public:
97 llvm::Function* function() const {
98 return _function;
99 }
100
101 // The Zero stack and our frame on it.
102 protected:
103 SharkStack* stack() const {
104 return _stack;
105 }
106
107 // Temporary oop storage.
108 protected:
109 llvm::Value* oop_tmp_slot() const {
110 assert(is_static() || is_returning_oop(), "should be");
111 return _oop_tmp_slot;
112 }
113
114 // Information required by nmethod::new_native_nmethod().
115 public:
116 int frame_size() const {
117 return stack()->oopmap_frame_size();
118 }
119 ByteSize receiver_offset() const {
120 return in_ByteSize(_receiver_slot_offset * wordSize);
121 }
122 ByteSize lock_offset() const {
123 return in_ByteSize(_lock_slot_offset * wordSize);
124 }
125 OopMapSet* oop_maps() const {
126 return _oop_maps;
127 }
128
129 // Helpers.
130 private:
131 llvm::BasicBlock* CreateBlock(const char* name = "") const {
132 return llvm::BasicBlock::Create(SharkContext::current(), name, function());
133 }
134 llvm::Value* thread_state_address() const {
135 return builder()->CreateAddressOfStructEntry(
136 thread(), JavaThread::thread_state_offset(),
137 llvm::PointerType::getUnqual(SharkType::jint_type()),
138 "thread_state_address");
139 }
140 llvm::Value* pending_exception_address() const {
141 return builder()->CreateAddressOfStructEntry(
142 thread(), Thread::pending_exception_offset(),
143 llvm::PointerType::getUnqual(SharkType::oop_type()),
144 "pending_exception_address");
145 }
146 void CreateSetThreadState(JavaThreadState state) const {
147 builder()->CreateStore(
148 LLVMValue::jint_constant(state), thread_state_address());
149 }
150 void CreateWriteMemorySerializePage() const {
151 builder()->CreateStore(
152 LLVMValue::jint_constant(1),
153 builder()->CreateIntToPtr(
154 builder()->CreateAdd(
155 LLVMValue::intptr_constant(
156 (intptr_t) os::get_memory_serialize_page()),
157 builder()->CreateAnd(
158 builder()->CreateLShr(
159 builder()->CreatePtrToInt(thread(), SharkType::intptr_type()),
160 LLVMValue::intptr_constant(os::get_serialize_page_shift_count())),
161 LLVMValue::intptr_constant(os::get_serialize_page_mask()))),
162 llvm::PointerType::getUnqual(SharkType::jint_type())));
163 }
164 void CreateResetHandleBlock() const {
165 llvm::Value *active_handles = builder()->CreateValueOfStructEntry(
166 thread(),
167 JavaThread::active_handles_offset(),
168 SharkType::jniHandleBlock_type(),
169 "active_handles");
170 builder()->CreateStore(
171 LLVMValue::intptr_constant(0),
172 builder()->CreateAddressOfStructEntry(
173 active_handles,
174 in_ByteSize(JNIHandleBlock::top_offset_in_bytes()),
175 llvm::PointerType::getUnqual(SharkType::intptr_type()),
176 "top"));
177 }
178 llvm::LoadInst* CreateLoadPendingException() const {
179 return builder()->CreateLoad(
180 pending_exception_address(), "pending_exception");
181 }
182 };