Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/relocator.hpp @ 2162:ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
Summary: Restore use of stillborn flag
Reviewed-by: acorn, alanb
author | dholmes |
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date | Tue, 25 Jan 2011 00:14:21 -0500 |
parents | 2f33b03bd915 |
children | b92c45f2bc75 |
rev | line source |
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0 | 1 /* |
2142 | 2 * Copyright (c) 1997, 2011, 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 | |
1972 | 25 #ifndef SHARE_VM_RUNTIME_RELOCATOR_HPP |
26 #define SHARE_VM_RUNTIME_RELOCATOR_HPP | |
27 | |
28 #include "interpreter/bytecodes.hpp" | |
29 #include "oops/methodOop.hpp" | |
30 #ifdef TARGET_ARCH_x86 | |
31 # include "bytes_x86.hpp" | |
32 #endif | |
33 #ifdef TARGET_ARCH_sparc | |
34 # include "bytes_sparc.hpp" | |
35 #endif | |
36 #ifdef TARGET_ARCH_zero | |
37 # include "bytes_zero.hpp" | |
38 #endif | |
39 | |
0 | 40 // This code has been converted from the 1.1E java virtual machine |
41 // Thanks to the JavaTopics group for using the code | |
42 | |
43 class ChangeItem; | |
44 | |
45 // Callback object for code relocations | |
46 class RelocatorListener : public StackObj { | |
47 public: | |
48 RelocatorListener() {}; | |
49 virtual void relocated(int bci, int delta, int new_method_size) = 0; | |
50 }; | |
51 | |
52 | |
53 class Relocator : public ResourceObj { | |
54 public: | |
55 Relocator(methodHandle method, RelocatorListener* listener); | |
56 methodHandle insert_space_at(int bci, int space, u_char inst_buffer[], TRAPS); | |
57 | |
58 // Callbacks from ChangeItem's | |
59 bool handle_code_changes(); | |
60 bool handle_widen (int bci, int new_ilen, u_char inst_buffer[]); // handles general instructions | |
61 void push_jump_widen (int bci, int delta, int new_delta); // pushes jumps | |
62 bool handle_jump_widen (int bci, int delta); // handles jumps | |
63 bool handle_switch_pad (int bci, int old_pad, bool is_lookup_switch); // handles table and lookup switches | |
64 | |
65 private: | |
66 unsigned char* _code_array; | |
67 int _code_array_length; | |
68 int _code_length; | |
69 unsigned char* _compressed_line_number_table; | |
70 int _compressed_line_number_table_size; | |
71 methodHandle _method; | |
72 u_char _overwrite[3]; // stores overwritten bytes for shrunken instructions | |
73 | |
74 GrowableArray<ChangeItem*>* _changes; | |
75 | |
76 unsigned char* code_array() const { return _code_array; } | |
77 void set_code_array(unsigned char* array) { _code_array = array; } | |
78 | |
79 int code_length() const { return _code_length; } | |
80 void set_code_length(int length) { _code_length = length; } | |
81 | |
82 int code_array_length() const { return _code_array_length; } | |
83 void set_code_array_length(int length) { _code_array_length = length; } | |
84 | |
85 unsigned char* compressed_line_number_table() const { return _compressed_line_number_table; } | |
86 void set_compressed_line_number_table(unsigned char* table) { _compressed_line_number_table = table; } | |
87 | |
88 int compressed_line_number_table_size() const { return _compressed_line_number_table_size; } | |
89 void set_compressed_line_number_table_size(int size) { _compressed_line_number_table_size = size; } | |
90 | |
91 methodHandle method() const { return _method; } | |
92 void set_method(methodHandle method) { _method = method; } | |
93 | |
94 // This will return a raw bytecode, which is possibly rewritten. | |
95 Bytecodes::Code code_at(int bci) const { return (Bytecodes::Code) code_array()[bci]; } | |
96 void code_at_put(int bci, Bytecodes::Code code) { code_array()[bci] = (char) code; } | |
97 | |
98 // get and set signed integers in the code_array | |
99 inline int int_at(int bci) const { return Bytes::get_Java_u4(&code_array()[bci]); } | |
100 inline void int_at_put(int bci, int value) { Bytes::put_Java_u4(&code_array()[bci], value); } | |
101 | |
102 // get and set signed shorts in the code_array | |
103 inline short short_at(int bci) const { return (short)Bytes::get_Java_u2(&code_array()[bci]); } | |
104 inline void short_at_put(int bci, short value) { Bytes::put_Java_u2((address) &code_array()[bci], value); } | |
105 | |
106 // get the address of in the code_array | |
107 inline char* addr_at(int bci) const { return (char*) &code_array()[bci]; } | |
108 | |
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109 int instruction_length_at(int bci) { return Bytecodes::length_at(NULL, code_array() + bci); } |
0 | 110 |
111 // Helper methods | |
112 int align(int n) const { return (n+3) & ~3; } | |
113 int code_slop_pct() const { return 25; } | |
114 bool is_opcode_lookupswitch(Bytecodes::Code bc); | |
115 | |
116 // basic relocation methods | |
117 bool relocate_code (int bci, int ilen, int delta); | |
118 void change_jumps (int break_bci, int delta); | |
119 void change_jump (int bci, int offset, bool is_short, int break_bci, int delta); | |
120 void adjust_exception_table(int bci, int delta); | |
121 void adjust_line_no_table (int bci, int delta); | |
122 void adjust_local_var_table(int bci, int delta); | |
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123 void adjust_stack_map_table(int bci, int delta); |
0 | 124 int get_orig_switch_pad (int bci, bool is_lookup_switch); |
125 int rc_instr_len (int bci); | |
126 bool expand_code_array (int delta); | |
127 | |
128 // Callback support | |
129 RelocatorListener *_listener; | |
130 void notify(int bci, int delta, int new_code_length) { | |
131 if (_listener != NULL) | |
132 _listener->relocated(bci, delta, new_code_length); | |
133 } | |
134 }; | |
1972 | 135 |
136 #endif // SHARE_VM_RUNTIME_RELOCATOR_HPP |