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comparison src/share/vm/shark/sharkCompiler.hpp @ 1692:d2ede61b7a12

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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
date Wed, 11 Aug 2010 05:51:21 -0700
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1691:4a665be40fd3 1692:d2ede61b7a12
1 /*
2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2008, 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 SharkContext;
27
28 class SharkCompiler : public AbstractCompiler {
29 public:
30 // Creation
31 SharkCompiler();
32
33 // Name of this compiler
34 const char *name() { return "shark"; }
35
36 // Missing feature tests
37 bool supports_native() { return true; }
38 bool supports_osr() { return true; }
39
40 // Customization
41 bool needs_adapters() { return false; }
42 bool needs_stubs() { return false; }
43
44 // Initialization
45 void initialize();
46
47 // Compile a normal (bytecode) method and install it in the VM
48 void compile_method(ciEnv* env, ciMethod* target, int entry_bci);
49
50 // Generate a wrapper for a native (JNI) method
51 nmethod* generate_native_wrapper(MacroAssembler* masm,
52 methodHandle target,
53 BasicType* arg_types,
54 BasicType return_type);
55
56 // Free compiled methods (and native wrappers)
57 void free_compiled_method(address code);
58
59 // Each thread generating IR needs its own context. The normal
60 // context is used for bytecode methods, and is protected from
61 // multiple simultaneous accesses by being restricted to the
62 // compiler thread. The native context is used for JNI methods,
63 // and is protected from multiple simultaneous accesses by the
64 // adapter handler library lock.
65 private:
66 SharkContext* _normal_context;
67 SharkContext* _native_context;
68
69 public:
70 SharkContext* context() const {
71 if (JavaThread::current()->is_Compiler_thread()) {
72 return _normal_context;
73 }
74 else {
75 assert(AdapterHandlerLibrary_lock->owned_by_self(), "should be");
76 return _native_context;
77 }
78 }
79
80 // The LLVM execution engine is the JIT we use to generate native
81 // code. It is thread safe, but we need to protect it with a lock
82 // of our own because otherwise LLVM's lock and HotSpot's locks
83 // interleave and deadlock. The SharkMemoryManager is not thread
84 // safe, and is protected by the same lock as the execution engine.
85 private:
86 Monitor* _execution_engine_lock;
87 SharkMemoryManager* _memory_manager;
88 llvm::ExecutionEngine* _execution_engine;
89
90 private:
91 Monitor* execution_engine_lock() const {
92 return _execution_engine_lock;
93 }
94 SharkMemoryManager* memory_manager() const {
95 assert(execution_engine_lock()->owned_by_self(), "should be");
96 return _memory_manager;
97 }
98 llvm::ExecutionEngine* execution_engine() const {
99 assert(execution_engine_lock()->owned_by_self(), "should be");
100 return _execution_engine;
101 }
102
103 // Global access
104 public:
105 static SharkCompiler* compiler() {
106 AbstractCompiler *compiler =
107 CompileBroker::compiler(CompLevel_fast_compile);
108 assert(compiler->is_shark() && compiler->is_initialized(), "should be");
109 return (SharkCompiler *) compiler;
110 }
111
112 // Helpers
113 private:
114 static const char* methodname(const char* klass, const char* method);
115 void generate_native_code(SharkEntry* entry,
116 llvm::Function* function,
117 const char* name);
118 void free_queued_methods();
119 };