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| 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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| 38 | 38 |
| 39 bool BreakLocationIterator::IsDebugBreakAtReturn() { | 39 bool BreakLocationIterator::IsDebugBreakAtReturn() { |
| 40 return Debug::IsDebugBreakAtReturn(rinfo()); | 40 return Debug::IsDebugBreakAtReturn(rinfo()); |
| 41 } | 41 } |
| 42 | 42 |
| 43 | 43 |
| 44 // Patch the JS frame exit code with a debug break call. See | 44 // Patch the JS frame exit code with a debug break call. See |
| 45 // CodeGenerator::VisitReturnStatement and VirtualFrame::Exit in codegen-ia32.cc | 45 // CodeGenerator::VisitReturnStatement and VirtualFrame::Exit in codegen-ia32.cc |
| 46 // for the precise return instructions sequence. | 46 // for the precise return instructions sequence. |
| 47 void BreakLocationIterator::SetDebugBreakAtReturn() { | 47 void BreakLocationIterator::SetDebugBreakAtReturn() { |
| 48 ASSERT(Debug::kIa32JSReturnSequenceLength >= | 48 ASSERT(Assembler::kJSReturnSequenceLength >= |
| 49 Debug::kIa32CallInstructionLength); | 49 Assembler::kCallInstructionLength); |
| 50 rinfo()->PatchCodeWithCall(Debug::debug_break_return()->entry(), | 50 rinfo()->PatchCodeWithCall(Debug::debug_break_return()->entry(), |
| 51 Debug::kIa32JSReturnSequenceLength - Debug::kIa32CallInstructionLength); | 51 Assembler::kJSReturnSequenceLength - Assembler::kCallInstructionLength); |
| 52 } | 52 } |
| 53 | 53 |
| 54 | 54 |
| 55 // Restore the JS frame exit code. | 55 // Restore the JS frame exit code. |
| 56 void BreakLocationIterator::ClearDebugBreakAtReturn() { | 56 void BreakLocationIterator::ClearDebugBreakAtReturn() { |
| 57 rinfo()->PatchCode(original_rinfo()->pc(), | 57 rinfo()->PatchCode(original_rinfo()->pc(), |
| 58 Debug::kIa32JSReturnSequenceLength); | 58 Assembler::kJSReturnSequenceLength); |
| 59 } | 59 } |
| 60 | 60 |
| 61 | 61 |
| 62 // A debug break in the frame exit code is identified by the JS frame exit code | 62 // A debug break in the frame exit code is identified by the JS frame exit code |
| 63 // having been patched with a call instruction. | 63 // having been patched with a call instruction. |
| 64 bool Debug::IsDebugBreakAtReturn(RelocInfo* rinfo) { | 64 bool Debug::IsDebugBreakAtReturn(RelocInfo* rinfo) { |
| 65 ASSERT(RelocInfo::IsJSReturn(rinfo->rmode())); | 65 ASSERT(RelocInfo::IsJSReturn(rinfo->rmode())); |
| 66 return rinfo->IsPatchedReturnSequence(); | 66 return rinfo->IsPatchedReturnSequence(); |
| 67 } | 67 } |
| 68 | 68 |
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| 199 // ----------------------------------- | 199 // ----------------------------------- |
| 200 Generate_DebugBreakCallHelper(masm, 0, false); | 200 Generate_DebugBreakCallHelper(masm, 0, false); |
| 201 } | 201 } |
| 202 | 202 |
| 203 | 203 |
| 204 #undef __ | 204 #undef __ |
| 205 | 205 |
| 206 #endif // ENABLE_DEBUGGER_SUPPORT | 206 #endif // ENABLE_DEBUGGER_SUPPORT |
| 207 | 207 |
| 208 } } // namespace v8::internal | 208 } } // namespace v8::internal |
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