Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/relocator.hpp @ 1936:8d88c9ac9247
Correct deopt handler entry. New flag -XX:+TraceSignals. More detailed deopt printing.
author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
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date | Thu, 23 Dec 2010 18:13:28 +0100 |
parents | a4c7fe54bf3f |
children | f95d63e2154a |
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0 | 1 /* |
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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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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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); | |
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108 void adjust_stack_map_table(int bci, int delta); |
0 | 109 int get_orig_switch_pad (int bci, bool is_lookup_switch); |
110 int rc_instr_len (int bci); | |
111 bool expand_code_array (int delta); | |
112 | |
113 // Callback support | |
114 RelocatorListener *_listener; | |
115 void notify(int bci, int delta, int new_code_length) { | |
116 if (_listener != NULL) | |
117 _listener->relocated(bci, delta, new_code_length); | |
118 } | |
119 }; |