Mercurial > hg > truffle
annotate src/share/vm/utilities/constantTag.hpp @ 1994:6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
7002546: regression on SpecJbb2005 on 7b118 comparing to 7b117 on small heaps
Summary: Relaxed assertion checking related to incremental_collection_failed flag to allow for ExplicitGCInvokesConcurrent behaviour where we do not want a failing scavenge to bail to a stop-world collection. Parameterized incremental_collection_will_fail() so we can selectively use, or not use, as appropriate, the statistical prediction at specific use sites. This essentially reverts the scavenge bail-out logic to what it was prior to some recent changes that had inadvertently started using the statistical prediction which can be noisy in the presence of bursty loads. Added some associated verbose non-product debugging messages.
Reviewed-by: johnc, tonyp
author | ysr |
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date | Tue, 07 Dec 2010 21:55:53 -0800 |
parents | f95d63e2154a |
children | dad31fc330cd |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, 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 | |
1972 | 25 #ifndef SHARE_VM_UTILITIES_CONSTANTTAG_HPP |
26 #define SHARE_VM_UTILITIES_CONSTANTTAG_HPP | |
27 | |
28 #include "prims/jvm.h" | |
29 #include "utilities/top.hpp" | |
30 | |
0 | 31 // constant tags in Java .class files |
32 | |
33 | |
34 enum { | |
35 // See jvm.h for shared JVM_CONSTANT_XXX tags | |
36 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/utilities/ConstantTag.java | |
37 // Hotspot specific tags | |
38 JVM_CONSTANT_Invalid = 0, // For bad value initialization | |
39 JVM_CONSTANT_InternalMin = 100, // First implementation tag (aside from bad value of course) | |
40 JVM_CONSTANT_UnresolvedClass = 100, // Temporary tag until actual use | |
41 JVM_CONSTANT_ClassIndex = 101, // Temporary tag while constructing constant pool | |
42 JVM_CONSTANT_UnresolvedString = 102, // Temporary tag until actual use | |
43 JVM_CONSTANT_StringIndex = 103, // Temporary tag while constructing constant pool | |
44 JVM_CONSTANT_UnresolvedClassInError = 104, // Error tag due to resolution error | |
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45 JVM_CONSTANT_Object = 105, // Required for BoundMethodHandle arguments. |
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46 JVM_CONSTANT_InternalMax = 105 // Last implementation tag |
0 | 47 }; |
48 | |
49 | |
50 class constantTag VALUE_OBJ_CLASS_SPEC { | |
51 private: | |
52 jbyte _tag; | |
53 public: | |
54 bool is_klass() const { return _tag == JVM_CONSTANT_Class; } | |
55 bool is_field () const { return _tag == JVM_CONSTANT_Fieldref; } | |
56 bool is_method() const { return _tag == JVM_CONSTANT_Methodref; } | |
57 bool is_interface_method() const { return _tag == JVM_CONSTANT_InterfaceMethodref; } | |
58 bool is_string() const { return _tag == JVM_CONSTANT_String; } | |
59 bool is_int() const { return _tag == JVM_CONSTANT_Integer; } | |
60 bool is_float() const { return _tag == JVM_CONSTANT_Float; } | |
61 bool is_long() const { return _tag == JVM_CONSTANT_Long; } | |
62 bool is_double() const { return _tag == JVM_CONSTANT_Double; } | |
63 bool is_name_and_type() const { return _tag == JVM_CONSTANT_NameAndType; } | |
64 bool is_utf8() const { return _tag == JVM_CONSTANT_Utf8; } | |
65 | |
66 bool is_invalid() const { return _tag == JVM_CONSTANT_Invalid; } | |
67 | |
68 bool is_unresolved_klass() const { | |
69 return _tag == JVM_CONSTANT_UnresolvedClass || _tag == JVM_CONSTANT_UnresolvedClassInError; | |
70 } | |
71 | |
72 bool is_unresolved_klass_in_error() const { | |
73 return _tag == JVM_CONSTANT_UnresolvedClassInError; | |
74 } | |
75 | |
76 bool is_klass_index() const { return _tag == JVM_CONSTANT_ClassIndex; } | |
77 bool is_unresolved_string() const { return _tag == JVM_CONSTANT_UnresolvedString; } | |
78 bool is_string_index() const { return _tag == JVM_CONSTANT_StringIndex; } | |
79 | |
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80 bool is_object() const { return _tag == JVM_CONSTANT_Object; } |
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81 |
0 | 82 bool is_klass_reference() const { return is_klass_index() || is_unresolved_klass(); } |
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83 bool is_klass_or_reference() const{ return is_klass() || is_klass_reference(); } |
0 | 84 bool is_field_or_method() const { return is_field() || is_method() || is_interface_method(); } |
85 bool is_symbol() const { return is_utf8(); } | |
86 | |
1602 | 87 bool is_method_type() const { return _tag == JVM_CONSTANT_MethodType; } |
88 bool is_method_handle() const { return _tag == JVM_CONSTANT_MethodHandle; } | |
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89 bool is_invoke_dynamic() const { return _tag == JVM_CONSTANT_InvokeDynamic; } |
1602 | 90 |
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91 bool is_loadable_constant() const { |
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92 return ((_tag >= JVM_CONSTANT_Integer && _tag <= JVM_CONSTANT_String) || |
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93 is_method_type() || is_method_handle() || |
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94 is_unresolved_klass() || is_unresolved_string() || |
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95 is_object()); |
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96 } |
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97 |
1602 | 98 constantTag() { |
99 _tag = JVM_CONSTANT_Invalid; | |
100 } | |
0 | 101 constantTag(jbyte tag) { |
102 assert((tag >= 0 && tag <= JVM_CONSTANT_NameAndType) || | |
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103 (tag >= JVM_CONSTANT_MethodHandle && tag <= JVM_CONSTANT_InvokeDynamic) || |
0 | 104 (tag >= JVM_CONSTANT_InternalMin && tag <= JVM_CONSTANT_InternalMax), "Invalid constant tag"); |
105 _tag = tag; | |
106 } | |
107 | |
108 jbyte value() { return _tag; } | |
109 | |
1602 | 110 BasicType basic_type() const; // if used with ldc, what kind of value gets pushed? |
111 | |
112 const char* internal_name() const; // for error reporting | |
113 | |
0 | 114 void print_on(outputStream* st) const PRODUCT_RETURN; |
115 }; | |
1972 | 116 |
117 #endif // SHARE_VM_UTILITIES_CONSTANTTAG_HPP |