1 /*
2 * Copyright (c) 2005, 2018, 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 */
24
25 #ifndef SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
26 #define SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
27
28 #include "jvmtifiles/jvmtiEnv.hpp"
29
30
31 class JvmtiConstantPoolReconstituter : public StackObj {
32 private:
33 int _cpool_size;
34 SymbolHashMap* _symmap;
35 SymbolHashMap* _classmap;
36 constantPoolHandle _cpool;
37 InstanceKlass* _ik;
38 jvmtiError _err;
39
40 protected:
41 InstanceKlass* ik() { return _ik; };
42 constantPoolHandle cpool() { return _cpool; };
43
44 u2 symbol_to_cpool_index(Symbol* sym) {
45 return _symmap->symbol_to_value(sym);
46 }
47
48 u2 class_symbol_to_cpool_index(Symbol* sym) {
49 return _classmap->symbol_to_value(sym);
50 }
51
52 public:
53 // Calls to this constructor must be proceeded by a ResourceMark
54 // and a HandleMark
55 JvmtiConstantPoolReconstituter(InstanceKlass* ik);
56
57 ~JvmtiConstantPoolReconstituter() {
58 if (_symmap != NULL) {
59 delete _symmap;
60 _symmap = NULL;
61 }
62 if (_classmap != NULL) {
63 delete _classmap;
64 _classmap = NULL;
65 }
66 }
67
68
69 void set_error(jvmtiError err) { _err = err; }
70 jvmtiError get_error() { return _err; }
71
72 int cpool_size() { return _cpool_size; }
73
74 void copy_cpool_bytes(unsigned char *cpool_bytes) {
75 if (cpool_bytes == NULL) {
76 assert(cpool_bytes != NULL, "cpool_bytes pointer must not be NULL");
77 return;
78 }
79 cpool()->copy_cpool_bytes(cpool_size(), _symmap, cpool_bytes);
80 }
81 };
82
83
84 class JvmtiClassFileReconstituter : public JvmtiConstantPoolReconstituter {
85 private:
86 size_t _buffer_size;
87 u1* _buffer;
88 u1* _buffer_ptr;
89 Thread* _thread;
90
91 enum {
92 // initial size should be power of two
93 initial_buffer_size = 1024
94 };
95
96 inline Thread* thread() { return _thread; }
97
98 void write_class_file_format();
99 void write_field_infos();
100 void write_method_infos();
101 void write_method_info(const methodHandle& method);
102 void write_code_attribute(const methodHandle& method);
103 void write_exceptions_attribute(ConstMethod* const_method);
104 void write_synthetic_attribute();
105 void write_class_attributes();
106 void write_source_file_attribute();
107 void write_source_debug_extension_attribute();
108 u2 line_number_table_entries(const methodHandle& method);
109 void write_line_number_table_attribute(const methodHandle& method, u2 num_entries);
110 void write_local_variable_table_attribute(const methodHandle& method, u2 num_entries);
111 void write_local_variable_type_table_attribute(const methodHandle& method, u2 num_entries);
112 void write_stackmap_table_attribute(const methodHandle& method, int stackmap_table_len);
113 u2 inner_classes_attribute_length();
114 void write_inner_classes_attribute(int length);
115 void write_signature_attribute(u2 generic_signaure_index);
116 void write_attribute_name_index(const char* name);
117 void write_annotations_attribute(const char* attr_name, AnnotationArray* annos);
118 void write_bootstrapmethod_attribute();
119 void write_nest_host_attribute();
120 void write_nest_members_attribute();
121
122 address writeable_address(size_t size);
123 void write_u1(u1 x);
124 void write_u2(u2 x);
125 void write_u4(u4 x);
126 void write_u8(u8 x);
127
128 public:
129 // Calls to this constructor must be proceeded by a ResourceMark
130 // and a HandleMark
131 JvmtiClassFileReconstituter(InstanceKlass* ik) :
132 JvmtiConstantPoolReconstituter(ik) {
133 _buffer_size = initial_buffer_size;
134 _buffer = _buffer_ptr = NEW_RESOURCE_ARRAY(u1, _buffer_size);
135 _thread = Thread::current();
136 write_class_file_format();
137 };
138
139 size_t class_file_size() { return _buffer_ptr - _buffer; }
140
141 u1* class_file_bytes() { return _buffer; }
142
143 static void copy_bytecodes(const methodHandle& method, unsigned char* bytecodes);
144 };
145
146 #endif // SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP