159 _data = NEW_RESOURCE_ARRAY(implicit_null_entry, (size*2));
160 _len = 0;
161 }
162
163 void ImplicitExceptionTable::append( uint exec_off, uint cont_off ) {
164 assert( (sizeof(implicit_null_entry) >= 4) || (exec_off < 65535), "" );
165 assert( (sizeof(implicit_null_entry) >= 4) || (cont_off < 65535), "" );
166 uint l = len();
167 if (l == _size) {
168 uint old_size_in_elements = _size*2;
169 if (_size == 0) _size = 4;
170 _size *= 2;
171 uint new_size_in_elements = _size*2;
172 _data = REALLOC_RESOURCE_ARRAY(uint, _data, old_size_in_elements, new_size_in_elements);
173 }
174 *(adr(l) ) = exec_off;
175 *(adr(l)+1) = cont_off;
176 _len = l+1;
177 };
178
179 uint ImplicitExceptionTable::at( uint exec_off ) const {
180 uint l = len();
181 for( uint i=0; i<l; i++ )
182 if( *adr(i) == exec_off )
183 return *(adr(i)+1);
184 return 0; // Failed to find any execption offset
185 }
186
187 void ImplicitExceptionTable::print(address base) const {
188 const uint n = len();
189 if (n > 0) {
190 const uint items_per_line = 3;
191 uint i;
192 tty->print_cr("ImplicitExceptionTable (size = %d entries, %d bytes):", n, size_in_bytes());
193 tty->print("{");
194 for (i = 0; i < n; i++) {
195 if (i%items_per_line == 0) {
196 tty->cr();
197 tty->fill_to(3);
198 }
199 tty->print("< " INTPTR_FORMAT ", " INTPTR_FORMAT " > ", p2i(base + *adr(i)), p2i(base + *(adr(i)+1)));
200 }
201 tty->bol();
202 tty->print_cr("}");
203 } else {
204 tty->print_cr("ImplicitExceptionTable is empty");
205 }
206 }
207
208 ImplicitExceptionTable::ImplicitExceptionTable(const nmethod* nm) {
209 if (nm->nul_chk_table_size() == 0) {
210 _len = 0;
211 _data = NULL;
212 } else {
213 // the first word is the length if non-zero, so read it out and
214 // skip to the next word to get the table.
215 _data = (implicit_null_entry*)nm->nul_chk_table_begin();
216 _len = _data[0];
217 _data++;
218 }
219 _size = len();
220 assert(size_in_bytes() <= nm->nul_chk_table_size(), "size of space allocated in nmethod incorrect");
221 }
222
223 void ImplicitExceptionTable::copy_to( nmethod* nm ) {
224 assert(size_in_bytes() <= nm->nul_chk_table_size(), "size of space allocated in nmethod incorrect");
225 if (len() != 0) {
226 implicit_null_entry* nmdata = (implicit_null_entry*)nm->nul_chk_table_begin();
227 // store the length in the first uint
228 nmdata[0] = _len;
229 nmdata++;
230 // copy the table after the length
231 memmove( nmdata, _data, 2 * len() * sizeof(implicit_null_entry));
232 } else {
233 // zero length table takes zero bytes
234 assert(size_in_bytes() == 0, "bad size");
235 assert(nm->nul_chk_table_size() == 0, "bad size");
236 }
237 }
238
239 void ImplicitExceptionTable::verify(nmethod *nm) const {
240 for (uint i = 0; i < len(); i++) {
241 if ((*adr(i) > (unsigned int)nm->insts_size()) ||
242 (*(adr(i)+1) > (unsigned int)nm->insts_size()))
243 fatal("Invalid offset in ImplicitExceptionTable at " PTR_FORMAT, p2i(_data));
244 }
245 }
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159 _data = NEW_RESOURCE_ARRAY(implicit_null_entry, (size*2));
160 _len = 0;
161 }
162
163 void ImplicitExceptionTable::append( uint exec_off, uint cont_off ) {
164 assert( (sizeof(implicit_null_entry) >= 4) || (exec_off < 65535), "" );
165 assert( (sizeof(implicit_null_entry) >= 4) || (cont_off < 65535), "" );
166 uint l = len();
167 if (l == _size) {
168 uint old_size_in_elements = _size*2;
169 if (_size == 0) _size = 4;
170 _size *= 2;
171 uint new_size_in_elements = _size*2;
172 _data = REALLOC_RESOURCE_ARRAY(uint, _data, old_size_in_elements, new_size_in_elements);
173 }
174 *(adr(l) ) = exec_off;
175 *(adr(l)+1) = cont_off;
176 _len = l+1;
177 };
178
179 uint ImplicitExceptionTable::continuation_offset( uint exec_off ) const {
180 uint l = len();
181 for( uint i=0; i<l; i++ )
182 if( *adr(i) == exec_off )
183 return *(adr(i)+1);
184 return 0; // Failed to find any execption offset
185 }
186
187 void ImplicitExceptionTable::print(address base) const {
188 const uint n = len();
189 if (n > 0) {
190 const uint items_per_line = 3;
191 uint i;
192 tty->print_cr("ImplicitExceptionTable (size = %d entries, %d bytes):", n, size_in_bytes());
193 tty->print("{");
194 for (i = 0; i < n; i++) {
195 if (i%items_per_line == 0) {
196 tty->cr();
197 tty->fill_to(3);
198 }
199 tty->print("< " INTPTR_FORMAT ", " INTPTR_FORMAT " > ", p2i(base + *adr(i)), p2i(base + *(adr(i)+1)));
200 }
201 tty->bol();
202 tty->print_cr("}");
203 } else {
204 tty->print_cr("ImplicitExceptionTable is empty");
205 }
206 }
207
208 ImplicitExceptionTable::ImplicitExceptionTable(const CompiledMethod* nm) {
209 if (nm->nul_chk_table_size() == 0) {
210 _len = 0;
211 _data = NULL;
212 } else {
213 // the first word is the length if non-zero, so read it out and
214 // skip to the next word to get the table.
215 _data = (implicit_null_entry*)nm->nul_chk_table_begin();
216 _len = _data[0];
217 _data++;
218 }
219 _size = len();
220 assert(size_in_bytes() <= nm->nul_chk_table_size(), "size of space allocated in nmethod incorrect");
221 }
222
223 void ImplicitExceptionTable::copy_to( nmethod* nm ) {
224 copy_bytes_to(nm->nul_chk_table_begin(), nm->nul_chk_table_size());
225 }
226
227 void ImplicitExceptionTable::copy_bytes_to(address addr, int size) {
228 assert(size_in_bytes() <= size, "size of space allocated in nmethod incorrect");
229 if (len() != 0) {
230 implicit_null_entry* nmdata = (implicit_null_entry*)addr;
231 // store the length in the first uint
232 nmdata[0] = _len;
233 nmdata++;
234 // copy the table after the length
235 memmove( nmdata, _data, 2 * len() * sizeof(implicit_null_entry));
236 } else {
237 // zero length table takes zero bytes
238 assert(size_in_bytes() == 0, "bad size");
239 assert(size == 0, "bad size");
240 }
241 }
242
243 void ImplicitExceptionTable::verify(nmethod *nm) const {
244 for (uint i = 0; i < len(); i++) {
245 if ((*adr(i) > (unsigned int)nm->insts_size()) ||
246 (*(adr(i)+1) > (unsigned int)nm->insts_size()))
247 fatal("Invalid offset in ImplicitExceptionTable at " PTR_FORMAT, p2i(_data));
248 }
249 }
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