Mercurial > hg > truffle
annotate src/share/vm/code/exceptionHandlerTable.cpp @ 12060:37165c3618a3
8023152: new hotspot build - hs25-b47
Reviewed-by: jcoomes
author | amurillo |
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date | Fri, 16 Aug 2013 04:24:07 -0700 |
parents | f95d63e2154a |
children | 78bbf4d43a14 |
rev | line source |
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0 | 1 /* |
1748 | 2 * Copyright (c) 1998, 2010, 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 #include "precompiled.hpp" |
26 #include "code/exceptionHandlerTable.hpp" | |
27 #include "code/nmethod.hpp" | |
28 #include "memory/allocation.inline.hpp" | |
0 | 29 |
30 void ExceptionHandlerTable::add_entry(HandlerTableEntry entry) { | |
31 _nesting.check(); | |
32 if (_length >= _size) { | |
33 // not enough space => grow the table (amortized growth, double its size) | |
34 guarantee(_size > 0, "no space allocated => cannot grow the table since it is part of nmethod"); | |
35 int new_size = _size * 2; | |
36 _table = REALLOC_RESOURCE_ARRAY(HandlerTableEntry, _table, _size, new_size); | |
37 _size = new_size; | |
38 } | |
39 assert(_length < _size, "sanity check"); | |
40 _table[_length++] = entry; | |
41 } | |
42 | |
43 | |
44 HandlerTableEntry* ExceptionHandlerTable::subtable_for(int catch_pco) const { | |
45 int i = 0; | |
46 while (i < _length) { | |
47 HandlerTableEntry* t = _table + i; | |
48 if (t->pco() == catch_pco) { | |
49 // found subtable matching the catch_pco | |
50 return t; | |
51 } else { | |
52 // advance to next subtable | |
53 i += t->len() + 1; // +1 for header | |
54 } | |
55 } | |
56 return NULL; | |
57 } | |
58 | |
59 | |
60 ExceptionHandlerTable::ExceptionHandlerTable(int initial_size) { | |
61 guarantee(initial_size > 0, "initial size must be > 0"); | |
62 _table = NEW_RESOURCE_ARRAY(HandlerTableEntry, initial_size); | |
63 _length = 0; | |
64 _size = initial_size; | |
65 } | |
66 | |
67 | |
68 ExceptionHandlerTable::ExceptionHandlerTable(const nmethod* nm) { | |
69 _table = (HandlerTableEntry*)nm->handler_table_begin(); | |
70 _length = nm->handler_table_size() / sizeof(HandlerTableEntry); | |
71 _size = 0; // no space allocated by ExeptionHandlerTable! | |
72 } | |
73 | |
74 | |
75 void ExceptionHandlerTable::add_subtable( | |
76 int catch_pco, | |
77 GrowableArray<intptr_t>* handler_bcis, | |
78 GrowableArray<intptr_t>* scope_depths_from_top_scope, | |
79 GrowableArray<intptr_t>* handler_pcos | |
80 ) { | |
81 assert(subtable_for(catch_pco) == NULL, "catch handlers for this catch_pco added twice"); | |
82 assert(handler_bcis->length() == handler_pcos->length(), "bci & pc table have different length"); | |
83 assert(scope_depths_from_top_scope == NULL || handler_bcis->length() == scope_depths_from_top_scope->length(), "bci & scope_depths table have different length"); | |
84 if (handler_bcis->length() > 0) { | |
85 // add subtable header | |
86 add_entry(HandlerTableEntry(handler_bcis->length(), catch_pco, 0)); | |
87 // add individual entries | |
88 for (int i = 0; i < handler_bcis->length(); i++) { | |
89 intptr_t scope_depth = 0; | |
90 if (scope_depths_from_top_scope != NULL) { | |
91 scope_depth = scope_depths_from_top_scope->at(i); | |
92 } | |
93 add_entry(HandlerTableEntry(handler_bcis->at(i), handler_pcos->at(i), scope_depth)); | |
94 assert(entry_for(catch_pco, handler_bcis->at(i), scope_depth)->pco() == handler_pcos->at(i), "entry not added correctly (1)"); | |
95 assert(entry_for(catch_pco, handler_bcis->at(i), scope_depth)->scope_depth() == scope_depth, "entry not added correctly (2)"); | |
96 } | |
97 } | |
98 } | |
99 | |
100 | |
101 void ExceptionHandlerTable::copy_to(nmethod* nm) { | |
102 assert(size_in_bytes() == nm->handler_table_size(), "size of space allocated in nmethod incorrect"); | |
103 memmove(nm->handler_table_begin(), _table, size_in_bytes()); | |
104 } | |
105 | |
106 | |
107 HandlerTableEntry* ExceptionHandlerTable::entry_for(int catch_pco, int handler_bci, int scope_depth) const { | |
108 HandlerTableEntry* t = subtable_for(catch_pco); | |
109 if (t != NULL) { | |
110 int l = t->len(); | |
111 while (l-- > 0) { | |
112 t++; | |
113 if (t->bci() == handler_bci && t->scope_depth() == scope_depth) return t; | |
114 } | |
115 } | |
116 return NULL; | |
117 } | |
118 | |
119 | |
120 void ExceptionHandlerTable::print_subtable(HandlerTableEntry* t) const { | |
121 int l = t->len(); | |
122 tty->print_cr("catch_pco = %d (%d entries)", t->pco(), l); | |
123 while (l-- > 0) { | |
124 t++; | |
125 tty->print_cr(" bci %d at scope depth %d -> pco %d", t->bci(), t->scope_depth(), t->pco()); | |
126 } | |
127 } | |
128 | |
129 | |
130 void ExceptionHandlerTable::print() const { | |
131 tty->print_cr("ExceptionHandlerTable (size = %d bytes)", size_in_bytes()); | |
132 int i = 0; | |
133 while (i < _length) { | |
134 HandlerTableEntry* t = _table + i; | |
135 print_subtable(t); | |
136 // advance to next subtable | |
137 i += t->len() + 1; // +1 for header | |
138 } | |
139 } | |
140 | |
141 void ExceptionHandlerTable::print_subtable_for(int catch_pco) const { | |
142 HandlerTableEntry* subtable = subtable_for(catch_pco); | |
143 | |
144 if( subtable != NULL ) { print_subtable( subtable ); } | |
145 } | |
146 | |
147 // ---------------------------------------------------------------------------- | |
148 // Implicit null exception tables. Maps an exception PC offset to a | |
149 // continuation PC offset. During construction it's a variable sized | |
150 // array with a max size and current length. When stored inside an | |
151 // nmethod a zero length table takes no space. This is detected by | |
152 // nul_chk_table_size() == 0. Otherwise the table has a length word | |
153 // followed by pairs of <excp-offset, const-offset>. | |
154 void ImplicitExceptionTable::set_size( uint size ) { | |
155 _size = size; | |
156 _data = NEW_RESOURCE_ARRAY(implicit_null_entry, (size*2)); | |
157 _len = 0; | |
158 } | |
159 | |
160 void ImplicitExceptionTable::append( uint exec_off, uint cont_off ) { | |
161 assert( (sizeof(implicit_null_entry) >= 4) || (exec_off < 65535), "" ); | |
162 assert( (sizeof(implicit_null_entry) >= 4) || (cont_off < 65535), "" ); | |
163 uint l = len(); | |
164 if (l == _size) { | |
165 uint old_size_in_elements = _size*2; | |
166 if (_size == 0) _size = 4; | |
167 _size *= 2; | |
168 uint new_size_in_elements = _size*2; | |
169 _data = REALLOC_RESOURCE_ARRAY(uint, _data, old_size_in_elements, new_size_in_elements); | |
170 } | |
171 *(adr(l) ) = exec_off; | |
172 *(adr(l)+1) = cont_off; | |
173 _len = l+1; | |
174 }; | |
175 | |
176 uint ImplicitExceptionTable::at( uint exec_off ) const { | |
177 uint l = len(); | |
178 for( uint i=0; i<l; i++ ) | |
179 if( *adr(i) == exec_off ) | |
180 return *(adr(i)+1); | |
181 return 0; // Failed to find any execption offset | |
182 } | |
183 | |
184 void ImplicitExceptionTable::print(address base) const { | |
185 tty->print("{"); | |
186 for( uint i=0; i<len(); i++ ) | |
187 tty->print("< "INTPTR_FORMAT", "INTPTR_FORMAT" > ",base + *adr(i), base + *(adr(i)+1)); | |
188 tty->print_cr("}"); | |
189 } | |
190 | |
191 ImplicitExceptionTable::ImplicitExceptionTable(const nmethod* nm) { | |
192 if (nm->nul_chk_table_size() == 0) { | |
193 _len = 0; | |
194 _data = NULL; | |
195 } else { | |
196 // the first word is the length if non-zero, so read it out and | |
197 // skip to the next word to get the table. | |
198 _data = (implicit_null_entry*)nm->nul_chk_table_begin(); | |
199 _len = _data[0]; | |
200 _data++; | |
201 } | |
202 _size = len(); | |
203 assert(size_in_bytes() <= nm->nul_chk_table_size(), "size of space allocated in nmethod incorrect"); | |
204 } | |
205 | |
206 void ImplicitExceptionTable::copy_to( nmethod* nm ) { | |
207 assert(size_in_bytes() <= nm->nul_chk_table_size(), "size of space allocated in nmethod incorrect"); | |
208 if (len() != 0) { | |
209 implicit_null_entry* nmdata = (implicit_null_entry*)nm->nul_chk_table_begin(); | |
210 // store the length in the first uint | |
211 nmdata[0] = _len; | |
212 nmdata++; | |
213 // copy the table after the length | |
214 memmove( nmdata, _data, 2 * len() * sizeof(implicit_null_entry)); | |
215 } else { | |
216 // zero length table takes zero bytes | |
217 assert(size_in_bytes() == 0, "bad size"); | |
218 assert(nm->nul_chk_table_size() == 0, "bad size"); | |
219 } | |
220 } | |
221 | |
222 void ImplicitExceptionTable::verify(nmethod *nm) const { | |
223 for (uint i = 0; i < len(); i++) { | |
1748 | 224 if ((*adr(i) > (unsigned int)nm->insts_size()) || |
225 (*(adr(i)+1) > (unsigned int)nm->insts_size())) | |
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226 fatal(err_msg("Invalid offset in ImplicitExceptionTable at " PTR_FORMAT, _data)); |
0 | 227 } |
228 } |