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/*
* Copyright (c) 2005, 2013, 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;
instanceKlassHandle _ikh;
jvmtiError _err;
protected:
instanceKlassHandle ikh() { return _ikh; };
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(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, mtClass);
_symmap = NULL;
}
if (_classmap != NULL) {
os::free(_classmap, mtClass);
_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(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(methodHandle method);
void write_line_number_table_attribute(methodHandle method, u2 num_entries);
void write_local_variable_table_attribute(methodHandle method, u2 num_entries);
void write_local_variable_type_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, 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(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);
};
#endif // SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
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