1 /*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2008, 2009, 2010, 2011 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_SHARKCOMPILER_HPP
27 #define SHARE_VM_SHARK_SHARKCOMPILER_HPP
28
29 #include "ci/ciEnv.hpp"
30 #include "ci/ciMethod.hpp"
31 #include "compiler/abstractCompiler.hpp"
32 #include "compiler/compileBroker.hpp"
33 #include "shark/llvmHeaders.hpp"
34 #include "shark/sharkMemoryManager.hpp"
35
36 class SharkContext;
37
38 class SharkCompiler : public AbstractCompiler {
39 public:
40 // Creation
41 SharkCompiler();
42
43 // Name of this compiler
44 const char *name() { return "shark"; }
45
46 // Missing feature tests
47 bool supports_native() { return true; }
48 bool supports_osr() { return true; }
49
50 // Customization
51 bool needs_adapters() { return false; }
52 bool needs_stubs() { return false; }
53
54 // Initialization
55 void initialize();
56
57 // Compile a normal (bytecode) method and install it in the VM
58 void compile_method(ciEnv* env, ciMethod* target, int entry_bci);
59
60 // Generate a wrapper for a native (JNI) method
61 nmethod* generate_native_wrapper(MacroAssembler* masm,
62 methodHandle target,
63 int compile_id,
64 BasicType* arg_types,
65 BasicType return_type);
66
67 // Free compiled methods (and native wrappers)
68 void free_compiled_method(address code);
69
70 // Each thread generating IR needs its own context. The normal
71 // context is used for bytecode methods, and is protected from
72 // multiple simultaneous accesses by being restricted to the
73 // compiler thread. The native context is used for JNI methods,
74 // and is protected from multiple simultaneous accesses by the
75 // adapter handler library lock.
76 private:
77 SharkContext* _normal_context;
78 SharkContext* _native_context;
79
80 public:
81 SharkContext* context() const {
82 if (JavaThread::current()->is_Compiler_thread()) {
83 return _normal_context;
84 }
85 else {
86 assert(AdapterHandlerLibrary_lock->owned_by_self(), "should be");
87 return _native_context;
88 }
89 }
90
91 // The LLVM execution engine is the JIT we use to generate native
92 // code. It is thread safe, but we need to protect it with a lock
93 // of our own because otherwise LLVM's lock and HotSpot's locks
94 // interleave and deadlock. The SharkMemoryManager is not thread
95 // safe, and is protected by the same lock as the execution engine.
96 private:
97 Monitor* _execution_engine_lock;
98 SharkMemoryManager* _memory_manager;
99 llvm::ExecutionEngine* _execution_engine;
100
101 private:
102 Monitor* execution_engine_lock() const {
103 return _execution_engine_lock;
104 }
105 SharkMemoryManager* memory_manager() const {
106 assert(execution_engine_lock()->owned_by_self(), "should be");
107 return _memory_manager;
108 }
109 llvm::ExecutionEngine* execution_engine() const {
110 assert(execution_engine_lock()->owned_by_self(), "should be");
111 return _execution_engine;
112 }
113
114 // Global access
115 public:
116 static SharkCompiler* compiler() {
117 AbstractCompiler *compiler =
118 CompileBroker::compiler(CompLevel_full_optimization);
119 assert(compiler->is_shark() && compiler->is_initialized(), "should be");
120 return (SharkCompiler *) compiler;
121 }
122
123 // Helpers
124 private:
125 static const char* methodname(const char* klass, const char* method);
126 void generate_native_code(SharkEntry* entry,
127 llvm::Function* function,
128 const char* name);
129 void free_queued_methods();
130 };
131
132 #endif // SHARE_VM_SHARK_SHARKCOMPILER_HPP