Mercurial > hg > truffle
annotate src/share/vm/shark/sharkCompiler.hpp @ 1994:6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
7002546: regression on SpecJbb2005 on 7b118 comparing to 7b117 on small heaps
Summary: Relaxed assertion checking related to incremental_collection_failed flag to allow for ExplicitGCInvokesConcurrent behaviour where we do not want a failing scavenge to bail to a stop-world collection. Parameterized incremental_collection_will_fail() so we can selectively use, or not use, as appropriate, the statistical prediction at specific use sites. This essentially reverts the scavenge bail-out logic to what it was prior to some recent changes that had inadvertently started using the statistical prediction which can be noisy in the presence of bursty loads. Added some associated verbose non-product debugging messages.
Reviewed-by: johnc, tonyp
| author | ysr |
|---|---|
| date | Tue, 07 Dec 2010 21:55:53 -0800 |
| parents | f95d63e2154a |
| children | e863062e521d |
| rev | line source |
|---|---|
| 1692 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| 1692 | 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 | |
| 1972 | 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 | |
| 1692 | 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 BasicType* arg_types, | |
| 64 BasicType return_type); | |
| 65 | |
| 66 // Free compiled methods (and native wrappers) | |
| 67 void free_compiled_method(address code); | |
| 68 | |
| 69 // Each thread generating IR needs its own context. The normal | |
| 70 // context is used for bytecode methods, and is protected from | |
| 71 // multiple simultaneous accesses by being restricted to the | |
| 72 // compiler thread. The native context is used for JNI methods, | |
| 73 // and is protected from multiple simultaneous accesses by the | |
| 74 // adapter handler library lock. | |
| 75 private: | |
| 76 SharkContext* _normal_context; | |
| 77 SharkContext* _native_context; | |
| 78 | |
| 79 public: | |
| 80 SharkContext* context() const { | |
| 81 if (JavaThread::current()->is_Compiler_thread()) { | |
| 82 return _normal_context; | |
| 83 } | |
| 84 else { | |
| 85 assert(AdapterHandlerLibrary_lock->owned_by_self(), "should be"); | |
| 86 return _native_context; | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 // The LLVM execution engine is the JIT we use to generate native | |
| 91 // code. It is thread safe, but we need to protect it with a lock | |
| 92 // of our own because otherwise LLVM's lock and HotSpot's locks | |
| 93 // interleave and deadlock. The SharkMemoryManager is not thread | |
| 94 // safe, and is protected by the same lock as the execution engine. | |
| 95 private: | |
| 96 Monitor* _execution_engine_lock; | |
| 97 SharkMemoryManager* _memory_manager; | |
| 98 llvm::ExecutionEngine* _execution_engine; | |
| 99 | |
| 100 private: | |
| 101 Monitor* execution_engine_lock() const { | |
| 102 return _execution_engine_lock; | |
| 103 } | |
| 104 SharkMemoryManager* memory_manager() const { | |
| 105 assert(execution_engine_lock()->owned_by_self(), "should be"); | |
| 106 return _memory_manager; | |
| 107 } | |
| 108 llvm::ExecutionEngine* execution_engine() const { | |
| 109 assert(execution_engine_lock()->owned_by_self(), "should be"); | |
| 110 return _execution_engine; | |
| 111 } | |
| 112 | |
| 113 // Global access | |
| 114 public: | |
| 115 static SharkCompiler* compiler() { | |
|
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a222fcfba398
6990549: Zero and Shark fixes after 6978355 and 6953144
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parents:
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116 AbstractCompiler *compiler = CompileBroker::compiler(CompLevel_simple); |
| 1692 | 117 assert(compiler->is_shark() && compiler->is_initialized(), "should be"); |
| 118 return (SharkCompiler *) compiler; | |
| 119 } | |
| 120 | |
| 121 // Helpers | |
| 122 private: | |
| 123 static const char* methodname(const char* klass, const char* method); | |
| 124 void generate_native_code(SharkEntry* entry, | |
| 125 llvm::Function* function, | |
| 126 const char* name); | |
| 127 void free_queued_methods(); | |
| 128 }; | |
| 1972 | 129 |
| 130 #endif // SHARE_VM_SHARK_SHARKCOMPILER_HPP |