Mercurial > hg > truffle
annotate src/share/vm/code/exceptionHandlerTable.cpp @ 21205:f34ae5c01864
include reexecute, rethrow_exception and return_oop info when disassembling debug scopes
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Mon, 04 May 2015 10:39:12 +0200 |
| parents | 78bbf4d43a14 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1998, 2014, 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 |
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30 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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31 |
| 0 | 32 void ExceptionHandlerTable::add_entry(HandlerTableEntry entry) { |
| 33 _nesting.check(); | |
| 34 if (_length >= _size) { | |
| 35 // not enough space => grow the table (amortized growth, double its size) | |
| 36 guarantee(_size > 0, "no space allocated => cannot grow the table since it is part of nmethod"); | |
| 37 int new_size = _size * 2; | |
| 38 _table = REALLOC_RESOURCE_ARRAY(HandlerTableEntry, _table, _size, new_size); | |
| 39 _size = new_size; | |
| 40 } | |
| 41 assert(_length < _size, "sanity check"); | |
| 42 _table[_length++] = entry; | |
| 43 } | |
| 44 | |
| 45 | |
| 46 HandlerTableEntry* ExceptionHandlerTable::subtable_for(int catch_pco) const { | |
| 47 int i = 0; | |
| 48 while (i < _length) { | |
| 49 HandlerTableEntry* t = _table + i; | |
| 50 if (t->pco() == catch_pco) { | |
| 51 // found subtable matching the catch_pco | |
| 52 return t; | |
| 53 } else { | |
| 54 // advance to next subtable | |
| 55 i += t->len() + 1; // +1 for header | |
| 56 } | |
| 57 } | |
| 58 return NULL; | |
| 59 } | |
| 60 | |
| 61 | |
| 62 ExceptionHandlerTable::ExceptionHandlerTable(int initial_size) { | |
| 63 guarantee(initial_size > 0, "initial size must be > 0"); | |
| 64 _table = NEW_RESOURCE_ARRAY(HandlerTableEntry, initial_size); | |
| 65 _length = 0; | |
| 66 _size = initial_size; | |
| 67 } | |
| 68 | |
| 69 | |
| 70 ExceptionHandlerTable::ExceptionHandlerTable(const nmethod* nm) { | |
| 71 _table = (HandlerTableEntry*)nm->handler_table_begin(); | |
| 72 _length = nm->handler_table_size() / sizeof(HandlerTableEntry); | |
| 73 _size = 0; // no space allocated by ExeptionHandlerTable! | |
| 74 } | |
| 75 | |
| 76 | |
| 77 void ExceptionHandlerTable::add_subtable( | |
| 78 int catch_pco, | |
| 79 GrowableArray<intptr_t>* handler_bcis, | |
| 80 GrowableArray<intptr_t>* scope_depths_from_top_scope, | |
| 81 GrowableArray<intptr_t>* handler_pcos | |
| 82 ) { | |
| 83 assert(subtable_for(catch_pco) == NULL, "catch handlers for this catch_pco added twice"); | |
| 84 assert(handler_bcis->length() == handler_pcos->length(), "bci & pc table have different length"); | |
| 85 assert(scope_depths_from_top_scope == NULL || handler_bcis->length() == scope_depths_from_top_scope->length(), "bci & scope_depths table have different length"); | |
| 86 if (handler_bcis->length() > 0) { | |
| 87 // add subtable header | |
| 88 add_entry(HandlerTableEntry(handler_bcis->length(), catch_pco, 0)); | |
| 89 // add individual entries | |
| 90 for (int i = 0; i < handler_bcis->length(); i++) { | |
| 91 intptr_t scope_depth = 0; | |
| 92 if (scope_depths_from_top_scope != NULL) { | |
| 93 scope_depth = scope_depths_from_top_scope->at(i); | |
| 94 } | |
| 95 add_entry(HandlerTableEntry(handler_bcis->at(i), handler_pcos->at(i), scope_depth)); | |
| 96 assert(entry_for(catch_pco, handler_bcis->at(i), scope_depth)->pco() == handler_pcos->at(i), "entry not added correctly (1)"); | |
| 97 assert(entry_for(catch_pco, handler_bcis->at(i), scope_depth)->scope_depth() == scope_depth, "entry not added correctly (2)"); | |
| 98 } | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 | |
| 103 void ExceptionHandlerTable::copy_to(nmethod* nm) { | |
| 104 assert(size_in_bytes() == nm->handler_table_size(), "size of space allocated in nmethod incorrect"); | |
| 105 memmove(nm->handler_table_begin(), _table, size_in_bytes()); | |
| 106 } | |
| 107 | |
| 108 | |
| 109 HandlerTableEntry* ExceptionHandlerTable::entry_for(int catch_pco, int handler_bci, int scope_depth) const { | |
| 110 HandlerTableEntry* t = subtable_for(catch_pco); | |
| 111 if (t != NULL) { | |
| 112 int l = t->len(); | |
| 113 while (l-- > 0) { | |
| 114 t++; | |
| 115 if (t->bci() == handler_bci && t->scope_depth() == scope_depth) return t; | |
| 116 } | |
| 117 } | |
| 118 return NULL; | |
| 119 } | |
| 120 | |
| 121 | |
| 122 void ExceptionHandlerTable::print_subtable(HandlerTableEntry* t) const { | |
| 123 int l = t->len(); | |
| 124 tty->print_cr("catch_pco = %d (%d entries)", t->pco(), l); | |
| 125 while (l-- > 0) { | |
| 126 t++; | |
| 127 tty->print_cr(" bci %d at scope depth %d -> pco %d", t->bci(), t->scope_depth(), t->pco()); | |
| 128 } | |
| 129 } | |
| 130 | |
| 131 | |
| 132 void ExceptionHandlerTable::print() const { | |
| 133 tty->print_cr("ExceptionHandlerTable (size = %d bytes)", size_in_bytes()); | |
| 134 int i = 0; | |
| 135 while (i < _length) { | |
| 136 HandlerTableEntry* t = _table + i; | |
| 137 print_subtable(t); | |
| 138 // advance to next subtable | |
| 139 i += t->len() + 1; // +1 for header | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 void ExceptionHandlerTable::print_subtable_for(int catch_pco) const { | |
| 144 HandlerTableEntry* subtable = subtable_for(catch_pco); | |
| 145 | |
| 146 if( subtable != NULL ) { print_subtable( subtable ); } | |
| 147 } | |
| 148 | |
| 149 // ---------------------------------------------------------------------------- | |
| 150 // Implicit null exception tables. Maps an exception PC offset to a | |
| 151 // continuation PC offset. During construction it's a variable sized | |
| 152 // array with a max size and current length. When stored inside an | |
| 153 // nmethod a zero length table takes no space. This is detected by | |
| 154 // nul_chk_table_size() == 0. Otherwise the table has a length word | |
| 155 // followed by pairs of <excp-offset, const-offset>. | |
| 156 void ImplicitExceptionTable::set_size( uint size ) { | |
| 157 _size = size; | |
| 158 _data = NEW_RESOURCE_ARRAY(implicit_null_entry, (size*2)); | |
| 159 _len = 0; | |
| 160 } | |
| 161 | |
| 162 void ImplicitExceptionTable::append( uint exec_off, uint cont_off ) { | |
| 163 assert( (sizeof(implicit_null_entry) >= 4) || (exec_off < 65535), "" ); | |
| 164 assert( (sizeof(implicit_null_entry) >= 4) || (cont_off < 65535), "" ); | |
| 165 uint l = len(); | |
| 166 if (l == _size) { | |
| 167 uint old_size_in_elements = _size*2; | |
| 168 if (_size == 0) _size = 4; | |
| 169 _size *= 2; | |
| 170 uint new_size_in_elements = _size*2; | |
| 171 _data = REALLOC_RESOURCE_ARRAY(uint, _data, old_size_in_elements, new_size_in_elements); | |
| 172 } | |
| 173 *(adr(l) ) = exec_off; | |
| 174 *(adr(l)+1) = cont_off; | |
| 175 _len = l+1; | |
| 176 }; | |
| 177 | |
| 178 uint ImplicitExceptionTable::at( uint exec_off ) const { | |
| 179 uint l = len(); | |
| 180 for( uint i=0; i<l; i++ ) | |
| 181 if( *adr(i) == exec_off ) | |
| 182 return *(adr(i)+1); | |
| 183 return 0; // Failed to find any execption offset | |
| 184 } | |
| 185 | |
| 186 void ImplicitExceptionTable::print(address base) const { | |
| 187 tty->print("{"); | |
| 188 for( uint i=0; i<len(); i++ ) | |
| 189 tty->print("< "INTPTR_FORMAT", "INTPTR_FORMAT" > ",base + *adr(i), base + *(adr(i)+1)); | |
| 190 tty->print_cr("}"); | |
| 191 } | |
| 192 | |
| 193 ImplicitExceptionTable::ImplicitExceptionTable(const nmethod* nm) { | |
| 194 if (nm->nul_chk_table_size() == 0) { | |
| 195 _len = 0; | |
| 196 _data = NULL; | |
| 197 } else { | |
| 198 // the first word is the length if non-zero, so read it out and | |
| 199 // skip to the next word to get the table. | |
| 200 _data = (implicit_null_entry*)nm->nul_chk_table_begin(); | |
| 201 _len = _data[0]; | |
| 202 _data++; | |
| 203 } | |
| 204 _size = len(); | |
| 205 assert(size_in_bytes() <= nm->nul_chk_table_size(), "size of space allocated in nmethod incorrect"); | |
| 206 } | |
| 207 | |
| 208 void ImplicitExceptionTable::copy_to( nmethod* nm ) { | |
| 209 assert(size_in_bytes() <= nm->nul_chk_table_size(), "size of space allocated in nmethod incorrect"); | |
| 210 if (len() != 0) { | |
| 211 implicit_null_entry* nmdata = (implicit_null_entry*)nm->nul_chk_table_begin(); | |
| 212 // store the length in the first uint | |
| 213 nmdata[0] = _len; | |
| 214 nmdata++; | |
| 215 // copy the table after the length | |
| 216 memmove( nmdata, _data, 2 * len() * sizeof(implicit_null_entry)); | |
| 217 } else { | |
| 218 // zero length table takes zero bytes | |
| 219 assert(size_in_bytes() == 0, "bad size"); | |
| 220 assert(nm->nul_chk_table_size() == 0, "bad size"); | |
| 221 } | |
| 222 } | |
| 223 | |
| 224 void ImplicitExceptionTable::verify(nmethod *nm) const { | |
| 225 for (uint i = 0; i < len(); i++) { | |
| 1748 | 226 if ((*adr(i) > (unsigned int)nm->insts_size()) || |
| 227 (*(adr(i)+1) > (unsigned int)nm->insts_size())) | |
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228 fatal(err_msg("Invalid offset in ImplicitExceptionTable at " PTR_FORMAT, _data)); |
| 0 | 229 } |
| 230 } |