Mercurial > hg > truffle
annotate src/share/vm/runtime/compilationPolicy.hpp @ 1648:8099e71601df
6968368: SIGSEGV in the BCEscapeAnalyzer::copy_dependencies
Summary: Use GrowableArray and VectorSet allocated in ciEnv arena.
Reviewed-by: never, twisti
author | kvn |
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date | Wed, 14 Jul 2010 14:47:34 -0700 |
parents | c18cbe5936b8 |
children | d5d065957597 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // The CompilationPolicy selects which method (if any) should be compiled. | |
26 // It also decides which methods must always be compiled (i.e., are never | |
27 // interpreted). | |
28 | |
29 class CompilationPolicy : public CHeapObj { | |
30 private: | |
31 static CompilationPolicy* _policy; | |
32 // Accumulated time | |
33 static elapsedTimer _accumulated_time; | |
34 | |
35 static bool _in_vm_startup; | |
36 | |
37 public: | |
38 virtual void method_invocation_event(methodHandle m, TRAPS) = 0; | |
39 virtual void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS) = 0; | |
40 virtual int compilation_level(methodHandle m, int branch_bci) = 0; | |
41 | |
42 void reset_counter_for_invocation_event(methodHandle method); | |
43 void reset_counter_for_back_branch_event(methodHandle method); | |
44 | |
45 static void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; } | |
46 static void completed_vm_startup(); | |
47 static bool delayCompilationDuringStartup() { return _in_vm_startup; } | |
48 | |
49 static bool mustBeCompiled(methodHandle m); // m must be compiled before executing it | |
50 static bool canBeCompiled(methodHandle m); // m is allowed to be compiled | |
51 | |
52 static void set_policy(CompilationPolicy* policy) { _policy = policy; } | |
53 static CompilationPolicy* policy() { return _policy; } | |
54 | |
55 // Profiling | |
56 elapsedTimer* accumulated_time() { return &_accumulated_time; } | |
57 void print_time() PRODUCT_RETURN; | |
58 }; | |
59 | |
60 class SimpleCompPolicy : public CompilationPolicy { | |
61 public: | |
62 void method_invocation_event( methodHandle m, TRAPS); | |
63 void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS); | |
64 int compilation_level(methodHandle m, int branch_bci); | |
65 }; | |
66 | |
67 // StackWalkCompPolicy - existing C2 policy | |
68 | |
69 #ifdef COMPILER2 | |
70 class StackWalkCompPolicy : public CompilationPolicy { | |
71 public: | |
72 void method_invocation_event(methodHandle m, TRAPS); | |
73 void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS); | |
74 int compilation_level(methodHandle m, int branch_bci); | |
75 | |
76 private: | |
77 RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack); | |
78 RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack); | |
79 | |
80 // the following variables hold values computed by the last inlining decision | |
81 // they are used for performance debugging only (print better messages) | |
82 static const char* _msg; // reason for not inlining | |
83 | |
84 static const char* shouldInline (methodHandle callee, float frequency, int cnt); | |
85 // positive filter: should send be inlined? returns NULL (--> yes) or rejection msg | |
86 static const char* shouldNotInline(methodHandle callee); | |
87 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg | |
88 | |
89 }; | |
90 #endif |