1 /* 2 * Copyright (c) 2005, 2017, 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(); 119 120 address writeable_address(size_t size); 121 void write_u1(u1 x); 122 void write_u2(u2 x); 123 void write_u4(u4 x); 124 void write_u8(u8 x); 125 126 public: 127 // Calls to this constructor must be proceeded by a ResourceMark 128 // and a HandleMark 129 JvmtiClassFileReconstituter(InstanceKlass* ik) : 130 JvmtiConstantPoolReconstituter(ik) { 131 _buffer_size = initial_buffer_size; 132 _buffer = _buffer_ptr = NEW_RESOURCE_ARRAY(u1, _buffer_size); 133 _thread = Thread::current(); 134 write_class_file_format(); 135 }; 136 137 size_t class_file_size() { return _buffer_ptr - _buffer; } 138 139 u1* class_file_bytes() { return _buffer; } 140 141 static void copy_bytecodes(const methodHandle& method, unsigned char* bytecodes); 142 }; 143 144 #endif // SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP