Mercurial > hg > truffle
annotate src/share/vm/runtime/compilationPolicy.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
author | johnc |
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date | Wed, 18 Aug 2010 10:59:06 -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. |
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5 * This code is free software; you can redistribute it and/or modify it | |
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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 |