Mercurial > hg > truffle
diff src/share/vm/prims/jvmtiClassFileReconstituter.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/prims/jvmtiClassFileReconstituter.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,146 @@ +/* + * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + + +class JvmtiConstantPoolReconstituter : public StackObj { + private: + int _cpool_size; + SymbolHashMap* _symmap; + SymbolHashMap* _classmap; + constantPoolHandle _cpool; + instanceKlassHandle _ikh; + jvmtiError _err; + + protected: + instanceKlassHandle ikh() { return _ikh; }; + constantPoolHandle cpool() { return _cpool; }; + + u2 symbol_to_cpool_index(symbolOop sym) { + return _symmap->symbol_to_value(sym); + } + + u2 class_symbol_to_cpool_index(symbolOop sym) { + return _classmap->symbol_to_value(sym); + } + + public: + // Calls to this constructor must be proceeded by a ResourceMark + // and a HandleMark + JvmtiConstantPoolReconstituter(instanceKlassHandle ikh){ + set_error(JVMTI_ERROR_NONE); + _ikh = ikh; + _cpool = constantPoolHandle(Thread::current(), ikh->constants()); + _symmap = new SymbolHashMap(); + _classmap = new SymbolHashMap(); + _cpool_size = _cpool->hash_entries_to(_symmap, _classmap); + if (_cpool_size == 0) { + set_error(JVMTI_ERROR_OUT_OF_MEMORY); + } else if (_cpool_size < 0) { + set_error(JVMTI_ERROR_INTERNAL); + } + } + + ~JvmtiConstantPoolReconstituter() { + if (_symmap != NULL) { + os::free(_symmap); + _symmap = NULL; + } + if (_classmap != NULL) { + os::free(_classmap); + _classmap = NULL; + } + } + + + void set_error(jvmtiError err) { _err = err; } + jvmtiError get_error() { return _err; } + + int cpool_size() { return _cpool_size; } + + void copy_cpool_bytes(unsigned char *cpool_bytes) { + if (cpool_bytes == NULL) { + assert(cpool_bytes != NULL, "cpool_bytes pointer must not be NULL"); + return; + } + cpool()->copy_cpool_bytes(cpool_size(), _symmap, cpool_bytes); + } +}; + + +class JvmtiClassFileReconstituter : public JvmtiConstantPoolReconstituter { + private: + size_t _buffer_size; + u1* _buffer; + u1* _buffer_ptr; + Thread* _thread; + + enum { + // initial size should be power of two + initial_buffer_size = 1024 + }; + + inline Thread* thread() { return _thread; } + + void write_class_file_format(); + void write_field_infos(); + void write_method_infos(); + void write_method_info(methodHandle method); + void write_code_attribute(methodHandle method); + void write_exceptions_attribute(constMethodHandle const_method); + void write_synthetic_attribute(); + void write_class_attributes(); + void write_source_file_attribute(); + void write_source_debug_extension_attribute(); + u2 line_number_table_entries(methodHandle method); + void write_line_number_table_attribute(methodHandle method, u2 num_entries); + void write_stackmap_table_attribute(methodHandle method, int stackmap_table_len); + u2 inner_classes_attribute_length(); + void write_inner_classes_attribute(int length); + void write_signature_attribute(u2 generic_signaure_index); + void write_attribute_name_index(const char* name); + void write_annotations_attribute(const char* attr_name, typeArrayHandle annos); + + address writeable_address(size_t size); + void write_u1(u1 x); + void write_u2(u2 x); + void write_u4(u4 x); + void write_u8(u8 x); + + public: + // Calls to this constructor must be proceeded by a ResourceMark + // and a HandleMark + JvmtiClassFileReconstituter(instanceKlassHandle ikh) : + JvmtiConstantPoolReconstituter(ikh) { + _buffer_size = initial_buffer_size; + _buffer = _buffer_ptr = NEW_RESOURCE_ARRAY(u1, _buffer_size); + _thread = Thread::current(); + write_class_file_format(); + }; + + size_t class_file_size() { return _buffer_ptr - _buffer; } + + u1* class_file_bytes() { return _buffer; } + + static void copy_bytecodes(methodHandle method, unsigned char* bytecodes); +};