Mercurial > hg > truffle
annotate src/share/vm/runtime/relocator.hpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | a61af66fc99e |
| children | a4c7fe54bf3f |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
2 * Copyright (c) 1997, 2004, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 // This code has been converted from the 1.1E java virtual machine | |
| 26 // Thanks to the JavaTopics group for using the code | |
| 27 | |
| 28 class ChangeItem; | |
| 29 | |
| 30 // Callback object for code relocations | |
| 31 class RelocatorListener : public StackObj { | |
| 32 public: | |
| 33 RelocatorListener() {}; | |
| 34 virtual void relocated(int bci, int delta, int new_method_size) = 0; | |
| 35 }; | |
| 36 | |
| 37 | |
| 38 class Relocator : public ResourceObj { | |
| 39 public: | |
| 40 Relocator(methodHandle method, RelocatorListener* listener); | |
| 41 methodHandle insert_space_at(int bci, int space, u_char inst_buffer[], TRAPS); | |
| 42 | |
| 43 // Callbacks from ChangeItem's | |
| 44 bool handle_code_changes(); | |
| 45 bool handle_widen (int bci, int new_ilen, u_char inst_buffer[]); // handles general instructions | |
| 46 void push_jump_widen (int bci, int delta, int new_delta); // pushes jumps | |
| 47 bool handle_jump_widen (int bci, int delta); // handles jumps | |
| 48 bool handle_switch_pad (int bci, int old_pad, bool is_lookup_switch); // handles table and lookup switches | |
| 49 | |
| 50 private: | |
| 51 unsigned char* _code_array; | |
| 52 int _code_array_length; | |
| 53 int _code_length; | |
| 54 unsigned char* _compressed_line_number_table; | |
| 55 int _compressed_line_number_table_size; | |
| 56 methodHandle _method; | |
| 57 u_char _overwrite[3]; // stores overwritten bytes for shrunken instructions | |
| 58 | |
| 59 GrowableArray<ChangeItem*>* _changes; | |
| 60 | |
| 61 unsigned char* code_array() const { return _code_array; } | |
| 62 void set_code_array(unsigned char* array) { _code_array = array; } | |
| 63 | |
| 64 int code_length() const { return _code_length; } | |
| 65 void set_code_length(int length) { _code_length = length; } | |
| 66 | |
| 67 int code_array_length() const { return _code_array_length; } | |
| 68 void set_code_array_length(int length) { _code_array_length = length; } | |
| 69 | |
| 70 unsigned char* compressed_line_number_table() const { return _compressed_line_number_table; } | |
| 71 void set_compressed_line_number_table(unsigned char* table) { _compressed_line_number_table = table; } | |
| 72 | |
| 73 int compressed_line_number_table_size() const { return _compressed_line_number_table_size; } | |
| 74 void set_compressed_line_number_table_size(int size) { _compressed_line_number_table_size = size; } | |
| 75 | |
| 76 methodHandle method() const { return _method; } | |
| 77 void set_method(methodHandle method) { _method = method; } | |
| 78 | |
| 79 // This will return a raw bytecode, which is possibly rewritten. | |
| 80 Bytecodes::Code code_at(int bci) const { return (Bytecodes::Code) code_array()[bci]; } | |
| 81 void code_at_put(int bci, Bytecodes::Code code) { code_array()[bci] = (char) code; } | |
| 82 | |
| 83 // get and set signed integers in the code_array | |
| 84 inline int int_at(int bci) const { return Bytes::get_Java_u4(&code_array()[bci]); } | |
| 85 inline void int_at_put(int bci, int value) { Bytes::put_Java_u4(&code_array()[bci], value); } | |
| 86 | |
| 87 // get and set signed shorts in the code_array | |
| 88 inline short short_at(int bci) const { return (short)Bytes::get_Java_u2(&code_array()[bci]); } | |
| 89 inline void short_at_put(int bci, short value) { Bytes::put_Java_u2((address) &code_array()[bci], value); } | |
| 90 | |
| 91 // get the address of in the code_array | |
| 92 inline char* addr_at(int bci) const { return (char*) &code_array()[bci]; } | |
| 93 | |
| 94 int instruction_length_at(int bci) { return Bytecodes::length_at(code_array() + bci); } | |
| 95 | |
| 96 // Helper methods | |
| 97 int align(int n) const { return (n+3) & ~3; } | |
| 98 int code_slop_pct() const { return 25; } | |
| 99 bool is_opcode_lookupswitch(Bytecodes::Code bc); | |
| 100 | |
| 101 // basic relocation methods | |
| 102 bool relocate_code (int bci, int ilen, int delta); | |
| 103 void change_jumps (int break_bci, int delta); | |
| 104 void change_jump (int bci, int offset, bool is_short, int break_bci, int delta); | |
| 105 void adjust_exception_table(int bci, int delta); | |
| 106 void adjust_line_no_table (int bci, int delta); | |
| 107 void adjust_local_var_table(int bci, int delta); | |
| 108 int get_orig_switch_pad (int bci, bool is_lookup_switch); | |
| 109 int rc_instr_len (int bci); | |
| 110 bool expand_code_array (int delta); | |
| 111 | |
| 112 // Callback support | |
| 113 RelocatorListener *_listener; | |
| 114 void notify(int bci, int delta, int new_code_length) { | |
| 115 if (_listener != NULL) | |
| 116 _listener->relocated(bci, delta, new_code_length); | |
| 117 } | |
| 118 }; |