7085404: JSR 292: VolatileCallSites should have push notification too
Reviewed-by: never, kvn
/*
* Copyright (c) 1997, 2011, 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
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*/
#ifndef SHARE_VM_RUNTIME_RELOCATOR_HPP
#define SHARE_VM_RUNTIME_RELOCATOR_HPP
#include "interpreter/bytecodes.hpp"
#include "oops/methodOop.hpp"
#ifdef TARGET_ARCH_x86
# include "bytes_x86.hpp"
#endif
#ifdef TARGET_ARCH_sparc
# include "bytes_sparc.hpp"
#endif
#ifdef TARGET_ARCH_zero
# include "bytes_zero.hpp"
#endif
#ifdef TARGET_ARCH_arm
# include "bytes_arm.hpp"
#endif
#ifdef TARGET_ARCH_ppc
# include "bytes_ppc.hpp"
#endif
// This code has been converted from the 1.1E java virtual machine
// Thanks to the JavaTopics group for using the code
class ChangeItem;
// Callback object for code relocations
class RelocatorListener : public StackObj {
public:
RelocatorListener() {};
virtual void relocated(int bci, int delta, int new_method_size) = 0;
};
class Relocator : public ResourceObj {
public:
Relocator(methodHandle method, RelocatorListener* listener);
methodHandle insert_space_at(int bci, int space, u_char inst_buffer[], TRAPS);
// Callbacks from ChangeItem's
bool handle_code_changes();
bool handle_widen (int bci, int new_ilen, u_char inst_buffer[]); // handles general instructions
void push_jump_widen (int bci, int delta, int new_delta); // pushes jumps
bool handle_jump_widen (int bci, int delta); // handles jumps
bool handle_switch_pad (int bci, int old_pad, bool is_lookup_switch); // handles table and lookup switches
private:
unsigned char* _code_array;
int _code_array_length;
int _code_length;
unsigned char* _compressed_line_number_table;
int _compressed_line_number_table_size;
methodHandle _method;
u_char _overwrite[3]; // stores overwritten bytes for shrunken instructions
GrowableArray<ChangeItem*>* _changes;
unsigned char* code_array() const { return _code_array; }
void set_code_array(unsigned char* array) { _code_array = array; }
int code_length() const { return _code_length; }
void set_code_length(int length) { _code_length = length; }
int code_array_length() const { return _code_array_length; }
void set_code_array_length(int length) { _code_array_length = length; }
unsigned char* compressed_line_number_table() const { return _compressed_line_number_table; }
void set_compressed_line_number_table(unsigned char* table) { _compressed_line_number_table = table; }
int compressed_line_number_table_size() const { return _compressed_line_number_table_size; }
void set_compressed_line_number_table_size(int size) { _compressed_line_number_table_size = size; }
methodHandle method() const { return _method; }
void set_method(methodHandle method) { _method = method; }
// This will return a raw bytecode, which is possibly rewritten.
Bytecodes::Code code_at(int bci) const { return (Bytecodes::Code) code_array()[bci]; }
void code_at_put(int bci, Bytecodes::Code code) { code_array()[bci] = (char) code; }
// get and set signed integers in the code_array
inline int int_at(int bci) const { return Bytes::get_Java_u4(&code_array()[bci]); }
inline void int_at_put(int bci, int value) { Bytes::put_Java_u4(&code_array()[bci], value); }
// get and set signed shorts in the code_array
inline short short_at(int bci) const { return (short)Bytes::get_Java_u2(&code_array()[bci]); }
inline void short_at_put(int bci, short value) { Bytes::put_Java_u2((address) &code_array()[bci], value); }
// get the address of in the code_array
inline char* addr_at(int bci) const { return (char*) &code_array()[bci]; }
int instruction_length_at(int bci) { return Bytecodes::length_at(NULL, code_array() + bci); }
// Helper methods
int align(int n) const { return (n+3) & ~3; }
int code_slop_pct() const { return 25; }
bool is_opcode_lookupswitch(Bytecodes::Code bc);
// basic relocation methods
bool relocate_code (int bci, int ilen, int delta);
void change_jumps (int break_bci, int delta);
void change_jump (int bci, int offset, bool is_short, int break_bci, int delta);
void adjust_exception_table(int bci, int delta);
void adjust_line_no_table (int bci, int delta);
void adjust_local_var_table(int bci, int delta);
void adjust_stack_map_table(int bci, int delta);
int get_orig_switch_pad (int bci, bool is_lookup_switch);
int rc_instr_len (int bci);
bool expand_code_array (int delta);
// Callback support
RelocatorListener *_listener;
void notify(int bci, int delta, int new_code_length) {
if (_listener != NULL)
_listener->relocated(bci, delta, new_code_length);
}
};
#endif // SHARE_VM_RUNTIME_RELOCATOR_HPP