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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/stack_frame.h" | 5 #include "vm/stack_frame.h" |
6 | 6 |
7 #include "vm/assembler_macros.h" | 7 #include "vm/assembler_macros.h" |
8 #include "vm/deopt_instructions.h" | 8 #include "vm/deopt_instructions.h" |
9 #include "vm/isolate.h" | 9 #include "vm/isolate.h" |
10 #include "vm/object.h" | 10 #include "vm/object.h" |
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145 return Code::null(); | 145 return Code::null(); |
146 } | 146 } |
147 | 147 |
148 | 148 |
149 bool StackFrame::FindExceptionHandler(uword* handler_pc) const { | 149 bool StackFrame::FindExceptionHandler(uword* handler_pc) const { |
150 const Code& code = Code::Handle(LookupDartCode()); | 150 const Code& code = Code::Handle(LookupDartCode()); |
151 if (code.IsNull()) { | 151 if (code.IsNull()) { |
152 return false; // Stub frames do not have exception handlers. | 152 return false; // Stub frames do not have exception handlers. |
153 } | 153 } |
154 | 154 |
155 // First try to find pc descriptor for the current pc. | 155 // Find pc descriptor for the current pc. |
156 intptr_t try_index = -1; | |
157 const PcDescriptors& descriptors = | 156 const PcDescriptors& descriptors = |
158 PcDescriptors::Handle(code.pc_descriptors()); | 157 PcDescriptors::Handle(code.pc_descriptors()); |
159 for (intptr_t i = 0; i < descriptors.Length(); i++) { | 158 for (intptr_t i = 0; i < descriptors.Length(); i++) { |
160 if ((static_cast<uword>(descriptors.PC(i)) == pc()) && | 159 if ((static_cast<uword>(descriptors.PC(i)) == pc()) && |
161 (descriptors.TryIndex(i) != -1)) { | 160 (descriptors.TryIndex(i) != -1)) { |
162 try_index = descriptors.TryIndex(i); | 161 const intptr_t try_index = descriptors.TryIndex(i); |
163 break; | 162 const ExceptionHandlers& handlers = |
164 } | 163 ExceptionHandlers::Handle(code.exception_handlers()); |
165 } | 164 *handler_pc = handlers.HandlerPC(try_index); |
166 if (try_index != -1) { | 165 return true; |
167 // We found a pc descriptor, now try to see if we have an | |
168 // exception catch handler for this try index. | |
169 const ExceptionHandlers& handlers = | |
170 ExceptionHandlers::Handle(code.exception_handlers()); | |
171 for (intptr_t j = 0; j < handlers.Length(); j++) { | |
172 if (handlers.TryIndex(j) == try_index) { | |
173 *handler_pc = handlers.HandlerPC(j); | |
174 return true; | |
175 } | |
176 } | 166 } |
177 } | 167 } |
178 return false; | 168 return false; |
179 } | 169 } |
180 | 170 |
181 | 171 |
182 intptr_t StackFrame::GetTokenPos() const { | 172 intptr_t StackFrame::GetTokenPos() const { |
183 const Code& code = Code::Handle(LookupDartCode()); | 173 const Code& code = Code::Handle(LookupDartCode()); |
184 if (code.IsNull()) { | 174 if (code.IsNull()) { |
185 return -1; // Stub frames do not have token_pos. | 175 return -1; // Stub frames do not have token_pos. |
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331 object_table_, | 321 object_table_, |
332 &func_); | 322 &func_); |
333 return func_.raw(); | 323 return func_.raw(); |
334 } | 324 } |
335 } | 325 } |
336 index_ = -1; | 326 index_ = -1; |
337 return Function::null(); | 327 return Function::null(); |
338 } | 328 } |
339 | 329 |
340 } // namespace dart | 330 } // namespace dart |
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