abstractCompiler.hpp (original) (raw)

1 /* 2 * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 / 24 25 #ifndef SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP 26 #define SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP 27 28 #include "ci/compilerInterface.hpp" 29 30 typedef void (initializer)(void); 31 32 #if INCLUDE_JVMCI 33 // Per-compiler statistics 34 class CompilerStatistics VALUE_OBJ_CLASS_SPEC { 35 friend class VMStructs; 36 37 class Data VALUE_OBJ_CLASS_SPEC { 38 friend class VMStructs; 39 public: 40 elapsedTimer _time; // time spent compiling 41 int _bytes; // number of bytecodes compiled, including inlined bytecodes 42 int _count; // number of compilations 43 Data() : _bytes(0), _count(0) {} 44 void update(elapsedTimer time, int bytes) { 45 _time.add(time); 46 _bytes += bytes; 47 _count++; 48 } 49 void reset() { 50 _time.reset(); 51 } 52 }; 53 54 public: 55 Data _standard; // stats for non-OSR compilations 56 Data _osr; // stats for OSR compilations 57 int _nmethods_size; // 58 int _nmethods_code_size; 59 int bytes_per_second() { 60 int bytes = _standard._bytes + _osr._bytes; 61 if (bytes == 0) { 62 return 0; 63 } 64 double seconds = _standard._time.seconds() + _osr._time.seconds(); 65 return seconds == 0.0 ? 0 : (int) (bytes / seconds); 66 } 67 CompilerStatistics() : _nmethods_size(0), _nmethods_code_size(0) {} 68 }; 69 #endif 70 71 class AbstractCompiler : public CHeapObj { 72 private: 73 volatile int _num_compiler_threads; 74 75 protected: 76 volatile int _compiler_state; 77 // Used for tracking global state of compiler runtime initialization 78 enum { uninitialized, initializing, initialized, failed, shut_down }; 79 80 // This method returns true for the first compiler thread that reaches that methods. 81 // This thread will initialize the compiler runtime. 82 bool should_perform_init(); 83 84 // The (closed set) of concrete compiler classes. 85 enum Type { 86 none, 87 c1, 88 c2, 89 jvmci, 90 shark 91 }; 92 93 private: 94 Type _type; 95 96 #if INCLUDE_JVMCI 97 CompilerStatistics _stats; 98 #endif 99 100 public: 101 AbstractCompiler(Type type) : _type(type), _compiler_state(uninitialized), _num_compiler_threads(0) {} 102 103 // This function determines the compiler thread that will perform the 104 // shutdown of the corresponding compiler runtime. 105 bool should_perform_shutdown(); 106 107 // Name of this compiler 108 virtual const char name() = 0; 109 110 // Missing feature tests 111 virtual bool supports_native() { return true; } 112 virtual bool supports_osr () { return true; } 113 virtual bool can_compile_method(methodHandle method) { return true; } 114 115 // Determine if the current compiler provides an intrinsic 116 // for method 'method'. An intrinsic is available if: 117 // - the intrinsic is enabled (by using the appropriate command-line flag) and 118 // - the platform on which the VM is running supports the intrinsic 119 // (i.e., the platform provides the instructions necessary for the compiler 120 // to generate the intrinsic code). 121 // 122 // The second parameter, 'compilation_context', is needed to implement functionality 123 // related to the DisableIntrinsic command-line flag. The DisableIntrinsic flag can 124 // be used to prohibit the compilers to use an intrinsic. There are three ways to 125 // disable an intrinsic using the DisableIntrinsic flag: 126 // 127 // (1) -XX:DisableIntrinsic=_hashCode,_getClass 128 // Disables intrinsification of _hashCode and _getClass globally 129 // (i.e., the intrinsified version the methods will not be used at all). 130 // (2) -XX:CompileCommand=option,aClass::aMethod,ccstr,DisableIntrinsic,_hashCode 131 // Disables intrinsification of _hashCode if it is called from 132 // aClass::aMethod (but not for any other call site of _hashCode) 133 // (3) -XX:CompileCommand=option,java.lang.ref.Reference::get,ccstr,DisableIntrinsic,_Reference_get 134 // Some methods are not compiled by C2. Instead, the C2 compiler 135 // returns directly the intrinsified version of these methods. 136 // The command above forces C2 to compile _Reference_get, but 137 // allows using the intrinsified version of _Reference_get at all 138 // other call sites. 139 // 140 // From the modes above, (1) disable intrinsics globally, (2) and (3) 141 // disable intrinsics on a per-method basis. In cases (2) and (3) the 142 // compilation context is aClass::aMethod and java.lang.ref.Reference::get, 143 // respectively. 144 virtual bool is_intrinsic_available(methodHandle method, methodHandle compilation_context) { 145 return is_intrinsic_supported(method) && 146 !vmIntrinsics::is_disabled_by_flags(method, compilation_context); 147 } 148 149 // Determines if an intrinsic is supported by the compiler, that is, 150 // the compiler provides the instructions necessary to generate 151 // the intrinsic code for method 'method'. 152 // 153 // The 'is_intrinsic_supported' method is a white list, that is, 154 // by default no intrinsics are supported by a compiler except 155 // the ones listed in the method. Overriding methods should conform 156 // to this behavior. 157 virtual bool is_intrinsic_supported(methodHandle method) { 158 return false; 159 } 160 161 // Compiler type queries. 162 bool is_c1() { return _type == c1; } 163 bool is_c2() { return _type == c2; } 164 bool is_jvmci() { return _type == jvmci; } 165 bool is_shark() { return _type == shark; } 166 167 // Customization 168 virtual void initialize () = 0; 169 170 void set_num_compiler_threads(int num) { _num_compiler_threads = num; } 171 int num_compiler_threads() { return _num_compiler_threads; } 172 173 // Get/set state of compiler objects 174 bool is_initialized() { return _compiler_state == initialized; } 175 bool is_failed () { return _compiler_state == failed;} 176 void set_state (int state); 177 void set_shut_down () { set_state(shut_down); } 178 // Compilation entry point for methods 179 virtual void compile_method(ciEnv env, ciMethod* target, int entry_bci) { 180 ShouldNotReachHere(); 181 } 182 183 184 // Print compilation timers and statistics 185 virtual void print_timers() { 186 ShouldNotReachHere(); 187 } 188 189 #if INCLUDE_JVMCI 190 CompilerStatistics* stats() { return &_stats; } 191 #endif 192 }; 193 194 #endif // SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP