Mon, 15 Oct 2018 14:58:52 +0100
Merge
1 /*
2 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
26 #define SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
28 #include "jvmtifiles/jvmtiEnv.hpp"
31 class JvmtiConstantPoolReconstituter : public StackObj {
32 private:
33 int _cpool_size;
34 SymbolHashMap* _symmap;
35 SymbolHashMap* _classmap;
36 constantPoolHandle _cpool;
37 instanceKlassHandle _ikh;
38 jvmtiError _err;
40 protected:
41 instanceKlassHandle ikh() { return _ikh; };
42 constantPoolHandle cpool() { return _cpool; };
44 u2 symbol_to_cpool_index(Symbol* sym) {
45 return _symmap->symbol_to_value(sym);
46 }
48 u2 class_symbol_to_cpool_index(Symbol* sym) {
49 return _classmap->symbol_to_value(sym);
50 }
52 public:
53 // Calls to this constructor must be proceeded by a ResourceMark
54 // and a HandleMark
55 JvmtiConstantPoolReconstituter(instanceKlassHandle ikh){
56 set_error(JVMTI_ERROR_NONE);
57 _ikh = ikh;
58 _cpool = constantPoolHandle(Thread::current(), ikh->constants());
59 _symmap = new SymbolHashMap();
60 _classmap = new SymbolHashMap();
61 _cpool_size = _cpool->hash_entries_to(_symmap, _classmap);
62 if (_cpool_size == 0) {
63 set_error(JVMTI_ERROR_OUT_OF_MEMORY);
64 } else if (_cpool_size < 0) {
65 set_error(JVMTI_ERROR_INTERNAL);
66 }
67 }
69 ~JvmtiConstantPoolReconstituter() {
70 if (_symmap != NULL) {
71 delete _symmap;
72 _symmap = NULL;
73 }
74 if (_classmap != NULL) {
75 delete _classmap;
76 _classmap = NULL;
77 }
78 }
81 void set_error(jvmtiError err) { _err = err; }
82 jvmtiError get_error() { return _err; }
84 int cpool_size() { return _cpool_size; }
86 void copy_cpool_bytes(unsigned char *cpool_bytes) {
87 if (cpool_bytes == NULL) {
88 assert(cpool_bytes != NULL, "cpool_bytes pointer must not be NULL");
89 return;
90 }
91 cpool()->copy_cpool_bytes(cpool_size(), _symmap, cpool_bytes);
92 }
93 };
96 class JvmtiClassFileReconstituter : public JvmtiConstantPoolReconstituter {
97 private:
98 size_t _buffer_size;
99 u1* _buffer;
100 u1* _buffer_ptr;
101 Thread* _thread;
103 enum {
104 // initial size should be power of two
105 initial_buffer_size = 1024
106 };
108 inline Thread* thread() { return _thread; }
110 void write_class_file_format();
111 void write_field_infos();
112 void write_method_infos();
113 void write_method_info(methodHandle method);
114 void write_code_attribute(methodHandle method);
115 void write_exceptions_attribute(ConstMethod* const_method);
116 void write_synthetic_attribute();
117 void write_class_attributes();
118 void write_source_file_attribute();
119 void write_source_debug_extension_attribute();
120 u2 line_number_table_entries(methodHandle method);
121 void write_line_number_table_attribute(methodHandle method, u2 num_entries);
122 void write_local_variable_table_attribute(methodHandle method, u2 num_entries);
123 void write_local_variable_type_table_attribute(methodHandle method, u2 num_entries);
124 void write_stackmap_table_attribute(methodHandle method, int stackmap_table_len);
125 u2 inner_classes_attribute_length();
126 void write_inner_classes_attribute(int length);
127 void write_signature_attribute(u2 generic_signaure_index);
128 void write_attribute_name_index(const char* name);
129 void write_annotations_attribute(const char* attr_name, AnnotationArray* annos);
130 void write_bootstrapmethod_attribute();
132 address writeable_address(size_t size);
133 void write_u1(u1 x);
134 void write_u2(u2 x);
135 void write_u4(u4 x);
136 void write_u8(u8 x);
138 public:
139 // Calls to this constructor must be proceeded by a ResourceMark
140 // and a HandleMark
141 JvmtiClassFileReconstituter(instanceKlassHandle ikh) :
142 JvmtiConstantPoolReconstituter(ikh) {
143 _buffer_size = initial_buffer_size;
144 _buffer = _buffer_ptr = NEW_RESOURCE_ARRAY(u1, _buffer_size);
145 _thread = Thread::current();
146 write_class_file_format();
147 };
149 size_t class_file_size() { return _buffer_ptr - _buffer; }
151 u1* class_file_bytes() { return _buffer; }
153 static void copy_bytecodes(methodHandle method, unsigned char* bytecodes);
154 };
156 #endif // SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP