--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/prims/jvmtiClassFileReconstituter.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 2005, 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
+#define SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
+
+#include "jvmtifiles/jvmtiEnv.hpp"
+
+
+class JvmtiConstantPoolReconstituter : public StackObj {
+ private:
+ int _cpool_size;
+ SymbolHashMap* _symmap;
+ SymbolHashMap* _classmap;
+ constantPoolHandle _cpool;
+ InstanceKlass* _ik;
+ jvmtiError _err;
+
+ protected:
+ InstanceKlass* ik() { return _ik; };
+ constantPoolHandle cpool() { return _cpool; };
+
+ u2 symbol_to_cpool_index(Symbol* sym) {
+ return _symmap->symbol_to_value(sym);
+ }
+
+ u2 class_symbol_to_cpool_index(Symbol* sym) {
+ return _classmap->symbol_to_value(sym);
+ }
+
+ public:
+ // Calls to this constructor must be proceeded by a ResourceMark
+ // and a HandleMark
+ JvmtiConstantPoolReconstituter(InstanceKlass* ik){
+ set_error(JVMTI_ERROR_NONE);
+ _ik = ik;
+ _cpool = constantPoolHandle(Thread::current(), ik->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) {
+ delete _symmap;
+ _symmap = NULL;
+ }
+ if (_classmap != NULL) {
+ delete _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(const methodHandle& method);
+ void write_code_attribute(const methodHandle& method);
+ void write_exceptions_attribute(ConstMethod* 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(const methodHandle& method);
+ void write_line_number_table_attribute(const methodHandle& method, u2 num_entries);
+ void write_local_variable_table_attribute(const methodHandle& method, u2 num_entries);
+ void write_local_variable_type_table_attribute(const methodHandle& method, u2 num_entries);
+ void write_stackmap_table_attribute(const 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, AnnotationArray* annos);
+ void write_bootstrapmethod_attribute();
+
+ 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(InstanceKlass* ik) :
+ JvmtiConstantPoolReconstituter(ik) {
+ _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(const methodHandle& method, unsigned char* bytecodes);
+};
+
+#endif // SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP