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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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1148 if (frame_entry<int>(re_frame, kDirectCall) == 1) { | 1148 if (frame_entry<int>(re_frame, kDirectCall) == 1) { |
1149 return RETRY; | 1149 return RETRY; |
1150 } | 1150 } |
1151 | 1151 |
1152 // Prepare for possible GC. | 1152 // Prepare for possible GC. |
1153 HandleScope handles(isolate); | 1153 HandleScope handles(isolate); |
1154 Handle<Code> code_handle(re_code); | 1154 Handle<Code> code_handle(re_code); |
1155 | 1155 |
1156 Handle<String> subject(frame_entry<String*>(re_frame, kInputString)); | 1156 Handle<String> subject(frame_entry<String*>(re_frame, kInputString)); |
1157 // Current string. | 1157 // Current string. |
1158 bool is_ascii = subject->IsAsciiRepresentationUnderneath(); | 1158 bool is_ascii = subject->IsOneByteRepresentationUnderneath(); |
1159 | 1159 |
1160 ASSERT(re_code->instruction_start() <= *return_address); | 1160 ASSERT(re_code->instruction_start() <= *return_address); |
1161 ASSERT(*return_address <= | 1161 ASSERT(*return_address <= |
1162 re_code->instruction_start() + re_code->instruction_size()); | 1162 re_code->instruction_start() + re_code->instruction_size()); |
1163 | 1163 |
1164 MaybeObject* result = Execution::HandleStackGuardInterrupt(isolate); | 1164 MaybeObject* result = Execution::HandleStackGuardInterrupt(isolate); |
1165 | 1165 |
1166 if (*code_handle != re_code) { // Return address no longer valid. | 1166 if (*code_handle != re_code) { // Return address no longer valid. |
1167 int delta = code_handle->address() - re_code->address(); | 1167 int delta = code_handle->address() - re_code->address(); |
1168 // Overwrite the return address on the stack. | 1168 // Overwrite the return address on the stack. |
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1179 // Extract the underlying string and the slice offset. | 1179 // Extract the underlying string and the slice offset. |
1180 if (StringShape(*subject_tmp).IsCons()) { | 1180 if (StringShape(*subject_tmp).IsCons()) { |
1181 subject_tmp = Handle<String>(ConsString::cast(*subject_tmp)->first()); | 1181 subject_tmp = Handle<String>(ConsString::cast(*subject_tmp)->first()); |
1182 } else if (StringShape(*subject_tmp).IsSliced()) { | 1182 } else if (StringShape(*subject_tmp).IsSliced()) { |
1183 SlicedString* slice = SlicedString::cast(*subject_tmp); | 1183 SlicedString* slice = SlicedString::cast(*subject_tmp); |
1184 subject_tmp = Handle<String>(slice->parent()); | 1184 subject_tmp = Handle<String>(slice->parent()); |
1185 slice_offset = slice->offset(); | 1185 slice_offset = slice->offset(); |
1186 } | 1186 } |
1187 | 1187 |
1188 // String might have changed. | 1188 // String might have changed. |
1189 if (subject_tmp->IsAsciiRepresentation() != is_ascii) { | 1189 if (subject_tmp->IsOneByteRepresentation() != is_ascii) { |
1190 // If we changed between an ASCII and an UC16 string, the specialized | 1190 // If we changed between an ASCII and an UC16 string, the specialized |
1191 // code cannot be used, and we need to restart regexp matching from | 1191 // code cannot be used, and we need to restart regexp matching from |
1192 // scratch (including, potentially, compiling a new version of the code). | 1192 // scratch (including, potentially, compiling a new version of the code). |
1193 return RETRY; | 1193 return RETRY; |
1194 } | 1194 } |
1195 | 1195 |
1196 // Otherwise, the content of the string might have moved. It must still | 1196 // Otherwise, the content of the string might have moved. It must still |
1197 // be a sequential or external string with the same content. | 1197 // be a sequential or external string with the same content. |
1198 // Update the start and end pointers in the stack frame to the current | 1198 // Update the start and end pointers in the stack frame to the current |
1199 // location (whether it has actually moved or not). | 1199 // location (whether it has actually moved or not). |
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1378 } | 1378 } |
1379 | 1379 |
1380 | 1380 |
1381 #undef __ | 1381 #undef __ |
1382 | 1382 |
1383 #endif // V8_INTERPRETED_REGEXP | 1383 #endif // V8_INTERPRETED_REGEXP |
1384 | 1384 |
1385 }} // namespace v8::internal | 1385 }} // namespace v8::internal |
1386 | 1386 |
1387 #endif // V8_TARGET_ARCH_MIPS | 1387 #endif // V8_TARGET_ARCH_MIPS |
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