| /* |
| * Copyright 2000-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| // The CompilationPolicy selects which method (if any) should be compiled. |
| // It also decides which methods must always be compiled (i.e., are never |
| // interpreted). |
| |
| class CompilationPolicy : public CHeapObj { |
| private: |
| static CompilationPolicy* _policy; |
| // Accumulated time |
| static elapsedTimer _accumulated_time; |
| |
| static bool _in_vm_startup; |
| |
| public: |
| virtual void method_invocation_event(methodHandle m, TRAPS) = 0; |
| virtual void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS) = 0; |
| virtual int compilation_level(methodHandle m, int branch_bci) = 0; |
| |
| void reset_counter_for_invocation_event(methodHandle method); |
| void reset_counter_for_back_branch_event(methodHandle method); |
| |
| static void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; } |
| static void completed_vm_startup(); |
| static bool delayCompilationDuringStartup() { return _in_vm_startup; } |
| |
| static bool mustBeCompiled(methodHandle m); // m must be compiled before executing it |
| static bool canBeCompiled(methodHandle m); // m is allowed to be compiled |
| |
| static void set_policy(CompilationPolicy* policy) { _policy = policy; } |
| static CompilationPolicy* policy() { return _policy; } |
| |
| // Profiling |
| elapsedTimer* accumulated_time() { return &_accumulated_time; } |
| void print_time() PRODUCT_RETURN; |
| }; |
| |
| class SimpleCompPolicy : public CompilationPolicy { |
| public: |
| void method_invocation_event( methodHandle m, TRAPS); |
| void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS); |
| int compilation_level(methodHandle m, int branch_bci); |
| }; |
| |
| // StackWalkCompPolicy - existing C2 policy |
| |
| #ifdef COMPILER2 |
| class StackWalkCompPolicy : public CompilationPolicy { |
| public: |
| void method_invocation_event(methodHandle m, TRAPS); |
| void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS); |
| int compilation_level(methodHandle m, int branch_bci); |
| |
| private: |
| RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack); |
| RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack); |
| |
| // the following variables hold values computed by the last inlining decision |
| // they are used for performance debugging only (print better messages) |
| static const char* _msg; // reason for not inlining |
| |
| static const char* shouldInline (methodHandle callee, float frequency, int cnt); |
| // positive filter: should send be inlined? returns NULL (--> yes) or rejection msg |
| static const char* shouldNotInline(methodHandle callee); |
| // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg |
| |
| }; |
| #endif |