Mercurial > hg > graal-compiler
annotate src/share/vm/prims/jvmtiClassFileReconstituter.hpp @ 1711:a6bff45449bc
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
author | ysr |
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date | Tue, 10 Aug 2010 14:53:35 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved. |
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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 | |
26 class JvmtiConstantPoolReconstituter : public StackObj { | |
27 private: | |
28 int _cpool_size; | |
29 SymbolHashMap* _symmap; | |
30 SymbolHashMap* _classmap; | |
31 constantPoolHandle _cpool; | |
32 instanceKlassHandle _ikh; | |
33 jvmtiError _err; | |
34 | |
35 protected: | |
36 instanceKlassHandle ikh() { return _ikh; }; | |
37 constantPoolHandle cpool() { return _cpool; }; | |
38 | |
39 u2 symbol_to_cpool_index(symbolOop sym) { | |
40 return _symmap->symbol_to_value(sym); | |
41 } | |
42 | |
43 u2 class_symbol_to_cpool_index(symbolOop sym) { | |
44 return _classmap->symbol_to_value(sym); | |
45 } | |
46 | |
47 public: | |
48 // Calls to this constructor must be proceeded by a ResourceMark | |
49 // and a HandleMark | |
50 JvmtiConstantPoolReconstituter(instanceKlassHandle ikh){ | |
51 set_error(JVMTI_ERROR_NONE); | |
52 _ikh = ikh; | |
53 _cpool = constantPoolHandle(Thread::current(), ikh->constants()); | |
54 _symmap = new SymbolHashMap(); | |
55 _classmap = new SymbolHashMap(); | |
56 _cpool_size = _cpool->hash_entries_to(_symmap, _classmap); | |
57 if (_cpool_size == 0) { | |
58 set_error(JVMTI_ERROR_OUT_OF_MEMORY); | |
59 } else if (_cpool_size < 0) { | |
60 set_error(JVMTI_ERROR_INTERNAL); | |
61 } | |
62 } | |
63 | |
64 ~JvmtiConstantPoolReconstituter() { | |
65 if (_symmap != NULL) { | |
66 os::free(_symmap); | |
67 _symmap = NULL; | |
68 } | |
69 if (_classmap != NULL) { | |
70 os::free(_classmap); | |
71 _classmap = NULL; | |
72 } | |
73 } | |
74 | |
75 | |
76 void set_error(jvmtiError err) { _err = err; } | |
77 jvmtiError get_error() { return _err; } | |
78 | |
79 int cpool_size() { return _cpool_size; } | |
80 | |
81 void copy_cpool_bytes(unsigned char *cpool_bytes) { | |
82 if (cpool_bytes == NULL) { | |
83 assert(cpool_bytes != NULL, "cpool_bytes pointer must not be NULL"); | |
84 return; | |
85 } | |
86 cpool()->copy_cpool_bytes(cpool_size(), _symmap, cpool_bytes); | |
87 } | |
88 }; | |
89 | |
90 | |
91 class JvmtiClassFileReconstituter : public JvmtiConstantPoolReconstituter { | |
92 private: | |
93 size_t _buffer_size; | |
94 u1* _buffer; | |
95 u1* _buffer_ptr; | |
96 Thread* _thread; | |
97 | |
98 enum { | |
99 // initial size should be power of two | |
100 initial_buffer_size = 1024 | |
101 }; | |
102 | |
103 inline Thread* thread() { return _thread; } | |
104 | |
105 void write_class_file_format(); | |
106 void write_field_infos(); | |
107 void write_method_infos(); | |
108 void write_method_info(methodHandle method); | |
109 void write_code_attribute(methodHandle method); | |
110 void write_exceptions_attribute(constMethodHandle const_method); | |
111 void write_synthetic_attribute(); | |
112 void write_class_attributes(); | |
113 void write_source_file_attribute(); | |
114 void write_source_debug_extension_attribute(); | |
115 u2 line_number_table_entries(methodHandle method); | |
116 void write_line_number_table_attribute(methodHandle method, u2 num_entries); | |
117 void write_stackmap_table_attribute(methodHandle method, int stackmap_table_len); | |
118 u2 inner_classes_attribute_length(); | |
119 void write_inner_classes_attribute(int length); | |
120 void write_signature_attribute(u2 generic_signaure_index); | |
121 void write_attribute_name_index(const char* name); | |
122 void write_annotations_attribute(const char* attr_name, typeArrayHandle annos); | |
123 | |
124 address writeable_address(size_t size); | |
125 void write_u1(u1 x); | |
126 void write_u2(u2 x); | |
127 void write_u4(u4 x); | |
128 void write_u8(u8 x); | |
129 | |
130 public: | |
131 // Calls to this constructor must be proceeded by a ResourceMark | |
132 // and a HandleMark | |
133 JvmtiClassFileReconstituter(instanceKlassHandle ikh) : | |
134 JvmtiConstantPoolReconstituter(ikh) { | |
135 _buffer_size = initial_buffer_size; | |
136 _buffer = _buffer_ptr = NEW_RESOURCE_ARRAY(u1, _buffer_size); | |
137 _thread = Thread::current(); | |
138 write_class_file_format(); | |
139 }; | |
140 | |
141 size_t class_file_size() { return _buffer_ptr - _buffer; } | |
142 | |
143 u1* class_file_bytes() { return _buffer; } | |
144 | |
145 static void copy_bytecodes(methodHandle method, unsigned char* bytecodes); | |
146 }; |