1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/runtime/compilationPolicy.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,90 @@
1.4 +/*
1.5 + * Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// The CompilationPolicy selects which method (if any) should be compiled.
1.29 +// It also decides which methods must always be compiled (i.e., are never
1.30 +// interpreted).
1.31 +
1.32 +class CompilationPolicy : public CHeapObj {
1.33 + private:
1.34 + static CompilationPolicy* _policy;
1.35 + // Accumulated time
1.36 + static elapsedTimer _accumulated_time;
1.37 +
1.38 + static bool _in_vm_startup;
1.39 +
1.40 + public:
1.41 + virtual void method_invocation_event(methodHandle m, TRAPS) = 0;
1.42 + virtual void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS) = 0;
1.43 + virtual int compilation_level(methodHandle m, int branch_bci) = 0;
1.44 +
1.45 + void reset_counter_for_invocation_event(methodHandle method);
1.46 + void reset_counter_for_back_branch_event(methodHandle method);
1.47 +
1.48 + static void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; }
1.49 + static void completed_vm_startup();
1.50 + static bool delayCompilationDuringStartup() { return _in_vm_startup; }
1.51 +
1.52 + static bool mustBeCompiled(methodHandle m); // m must be compiled before executing it
1.53 + static bool canBeCompiled(methodHandle m); // m is allowed to be compiled
1.54 +
1.55 + static void set_policy(CompilationPolicy* policy) { _policy = policy; }
1.56 + static CompilationPolicy* policy() { return _policy; }
1.57 +
1.58 + // Profiling
1.59 + elapsedTimer* accumulated_time() { return &_accumulated_time; }
1.60 + void print_time() PRODUCT_RETURN;
1.61 +};
1.62 +
1.63 +class SimpleCompPolicy : public CompilationPolicy {
1.64 + public:
1.65 + void method_invocation_event( methodHandle m, TRAPS);
1.66 + void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS);
1.67 + int compilation_level(methodHandle m, int branch_bci);
1.68 +};
1.69 +
1.70 +// StackWalkCompPolicy - existing C2 policy
1.71 +
1.72 +#ifdef COMPILER2
1.73 +class StackWalkCompPolicy : public CompilationPolicy {
1.74 + public:
1.75 + void method_invocation_event(methodHandle m, TRAPS);
1.76 + void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS);
1.77 + int compilation_level(methodHandle m, int branch_bci);
1.78 +
1.79 + private:
1.80 + RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack);
1.81 + RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack);
1.82 +
1.83 + // the following variables hold values computed by the last inlining decision
1.84 + // they are used for performance debugging only (print better messages)
1.85 + static const char* _msg; // reason for not inlining
1.86 +
1.87 + static const char* shouldInline (methodHandle callee, float frequency, int cnt);
1.88 + // positive filter: should send be inlined? returns NULL (--> yes) or rejection msg
1.89 + static const char* shouldNotInline(methodHandle callee);
1.90 + // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg
1.91 +
1.92 +};
1.93 +#endif
