| /* |
| * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP |
| #define SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP |
| |
| #include "ci/compilerInterface.hpp" |
| #include "compiler/compilerDefinitions.hpp" |
| #include "compiler/compilerDirectives.hpp" |
| |
| typedef void (*initializer)(void); |
| |
| #if INCLUDE_JVMCI |
| // Per-compiler statistics |
| class CompilerStatistics { |
| friend class VMStructs; |
| |
| class Data { |
| friend class VMStructs; |
| public: |
| elapsedTimer _time; // time spent compiling |
| int _bytes; // number of bytecodes compiled, including inlined bytecodes |
| int _count; // number of compilations |
| Data() : _bytes(0), _count(0) {} |
| void update(elapsedTimer time, int bytes) { |
| _time.add(time); |
| _bytes += bytes; |
| _count++; |
| } |
| void reset() { |
| _time.reset(); |
| } |
| }; |
| |
| public: |
| Data _standard; // stats for non-OSR compilations |
| Data _osr; // stats for OSR compilations |
| int _nmethods_size; // |
| int _nmethods_code_size; |
| int bytes_per_second() { |
| int bytes = _standard._bytes + _osr._bytes; |
| if (bytes == 0) { |
| return 0; |
| } |
| double seconds = _standard._time.seconds() + _osr._time.seconds(); |
| return seconds == 0.0 ? 0 : (int) (bytes / seconds); |
| } |
| CompilerStatistics() : _nmethods_size(0), _nmethods_code_size(0) {} |
| }; |
| #endif // INCLUDE_JVMCI |
| |
| class AbstractCompiler : public CHeapObj<mtCompiler> { |
| private: |
| volatile int _num_compiler_threads; |
| |
| protected: |
| volatile int _compiler_state; |
| // Used for tracking global state of compiler runtime initialization |
| enum { uninitialized, initializing, initialized, failed, shut_down }; |
| |
| // This method returns true for the first compiler thread that reaches that methods. |
| // This thread will initialize the compiler runtime. |
| bool should_perform_init(); |
| |
| private: |
| const CompilerType _type; |
| |
| #if INCLUDE_JVMCI |
| CompilerStatistics _stats; |
| #endif |
| |
| public: |
| AbstractCompiler(CompilerType type) : _type(type), _compiler_state(uninitialized), _num_compiler_threads(0) {} |
| |
| // This function determines the compiler thread that will perform the |
| // shutdown of the corresponding compiler runtime. |
| bool should_perform_shutdown(); |
| |
| // Name of this compiler |
| virtual const char* name() = 0; |
| |
| // Missing feature tests |
| virtual bool supports_native() { return true; } |
| virtual bool supports_osr () { return true; } |
| virtual bool can_compile_method(const methodHandle& method) { return true; } |
| |
| // Determine if the current compiler provides an intrinsic |
| // for method 'method'. An intrinsic is available if: |
| // - the intrinsic is enabled (by using the appropriate command-line flag, |
| // the command-line compile ommand, or a compiler directive) |
| // - the platform on which the VM is running supports the intrinsic |
| // (i.e., the platform provides the instructions necessary for the compiler |
| // to generate the intrinsic code). |
| // |
| // The directive provides the compilation context and includes pre-evaluated values |
| // dependent on VM flags, compile commands, and compiler directives. |
| // |
| // Usually, the compilation context is the caller of the method 'method'. |
| // The only case when for a non-recursive method 'method' the compilation context |
| // is not the caller of the 'method' (but it is the method itself) is |
| // java.lang.ref.Referene::get. |
| // For java.lang.ref.Reference::get, the intrinsic version is used |
| // instead of the compiled version so that the value in the referent |
| // field can be registered by the G1 pre-barrier code. The intrinsified |
| // version of Reference::get also adds a memory barrier to prevent |
| // commoning reads from the referent field across safepoint since GC |
| // can change the referent field's value. See Compile::Compile() |
| // in src/share/vm/opto/compile.cpp or |
| // GraphBuilder::GraphBuilder() in src/share/vm/c1/c1_GraphBuilder.cpp |
| // for more details. |
| |
| virtual bool is_intrinsic_available(const methodHandle& method, DirectiveSet* directive) { |
| return is_intrinsic_supported(method) && |
| !directive->is_intrinsic_disabled(method) && |
| !vmIntrinsics::is_disabled_by_flags(method); |
| } |
| |
| // Determines if an intrinsic is supported by the compiler, that is, |
| // the compiler provides the instructions necessary to generate |
| // the intrinsic code for method 'method'. |
| // |
| // The 'is_intrinsic_supported' method is a white list, that is, |
| // by default no intrinsics are supported by a compiler except |
| // the ones listed in the method. Overriding methods should conform |
| // to this behavior. |
| virtual bool is_intrinsic_supported(const methodHandle& method) { |
| return false; |
| } |
| |
| // Compiler type queries. |
| const bool is_c1() { return _type == compiler_c1; } |
| const bool is_c2() { return _type == compiler_c2; } |
| const bool is_jvmci() { return _type == compiler_jvmci; } |
| const CompilerType type() { return _type; } |
| |
| // Extra tests to identify trivial methods for the tiered compilation policy. |
| virtual bool is_trivial(Method* method) { return false; } |
| |
| // Customization |
| virtual void initialize () = 0; |
| |
| void set_num_compiler_threads(int num) { _num_compiler_threads = num; } |
| int num_compiler_threads() { return _num_compiler_threads; } |
| |
| // Get/set state of compiler objects |
| bool is_initialized() { return _compiler_state == initialized; } |
| bool is_failed () { return _compiler_state == failed;} |
| void set_state (int state); |
| void set_shut_down () { set_state(shut_down); } |
| // Compilation entry point for methods |
| virtual void compile_method(ciEnv* env, ciMethod* target, int entry_bci, DirectiveSet* directive) { |
| ShouldNotReachHere(); |
| } |
| |
| |
| // Print compilation timers and statistics |
| virtual void print_timers() { |
| ShouldNotReachHere(); |
| } |
| |
| #if INCLUDE_JVMCI |
| CompilerStatistics* stats() { return &_stats; } |
| #endif |
| }; |
| |
| #endif // SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP |