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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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42 return Debug::IsDebugBreakAtReturn(rinfo()); | 42 return Debug::IsDebugBreakAtReturn(rinfo()); |
43 } | 43 } |
44 | 44 |
45 | 45 |
46 // Patch the JS frame exit code with a debug break call. See | 46 // Patch the JS frame exit code with a debug break call. See |
47 // CodeGenerator::VisitReturnStatement and VirtualFrame::Exit in codegen-x64.cc | 47 // CodeGenerator::VisitReturnStatement and VirtualFrame::Exit in codegen-x64.cc |
48 // for the precise return instructions sequence. | 48 // for the precise return instructions sequence. |
49 void BreakLocationIterator::SetDebugBreakAtReturn() { | 49 void BreakLocationIterator::SetDebugBreakAtReturn() { |
50 ASSERT(Assembler::kJSReturnSequenceLength >= | 50 ASSERT(Assembler::kJSReturnSequenceLength >= |
51 Assembler::kCallInstructionLength); | 51 Assembler::kCallInstructionLength); |
52 rinfo()->PatchCodeWithCall(Debug::debug_break_return()->entry(), | 52 rinfo()->PatchCodeWithCall( |
| 53 Isolate::Current()->debug()->debug_break_return()->entry(), |
53 Assembler::kJSReturnSequenceLength - Assembler::kCallInstructionLength); | 54 Assembler::kJSReturnSequenceLength - Assembler::kCallInstructionLength); |
54 } | 55 } |
55 | 56 |
56 | 57 |
57 // Restore the JS frame exit code. | 58 // Restore the JS frame exit code. |
58 void BreakLocationIterator::ClearDebugBreakAtReturn() { | 59 void BreakLocationIterator::ClearDebugBreakAtReturn() { |
59 rinfo()->PatchCode(original_rinfo()->pc(), | 60 rinfo()->PatchCode(original_rinfo()->pc(), |
60 Assembler::kJSReturnSequenceLength); | 61 Assembler::kJSReturnSequenceLength); |
61 } | 62 } |
62 | 63 |
63 | 64 |
64 // A debug break in the frame exit code is identified by the JS frame exit code | 65 // A debug break in the frame exit code is identified by the JS frame exit code |
65 // having been patched with a call instruction. | 66 // having been patched with a call instruction. |
66 bool Debug::IsDebugBreakAtReturn(v8::internal::RelocInfo* rinfo) { | 67 bool Debug::IsDebugBreakAtReturn(v8::internal::RelocInfo* rinfo) { |
67 ASSERT(RelocInfo::IsJSReturn(rinfo->rmode())); | 68 ASSERT(RelocInfo::IsJSReturn(rinfo->rmode())); |
68 return rinfo->IsPatchedReturnSequence(); | 69 return rinfo->IsPatchedReturnSequence(); |
69 } | 70 } |
70 | 71 |
71 | 72 |
72 bool BreakLocationIterator::IsDebugBreakAtSlot() { | 73 bool BreakLocationIterator::IsDebugBreakAtSlot() { |
73 ASSERT(IsDebugBreakSlot()); | 74 ASSERT(IsDebugBreakSlot()); |
74 // Check whether the debug break slot instructions have been patched. | 75 // Check whether the debug break slot instructions have been patched. |
75 return !Assembler::IsNop(rinfo()->pc()); | 76 return !Assembler::IsNop(rinfo()->pc()); |
76 } | 77 } |
77 | 78 |
78 | 79 |
79 void BreakLocationIterator::SetDebugBreakAtSlot() { | 80 void BreakLocationIterator::SetDebugBreakAtSlot() { |
80 ASSERT(IsDebugBreakSlot()); | 81 ASSERT(IsDebugBreakSlot()); |
81 rinfo()->PatchCodeWithCall( | 82 rinfo()->PatchCodeWithCall( |
82 Debug::debug_break_slot()->entry(), | 83 Isolate::Current()->debug()->debug_break_slot()->entry(), |
83 Assembler::kDebugBreakSlotLength - Assembler::kCallInstructionLength); | 84 Assembler::kDebugBreakSlotLength - Assembler::kCallInstructionLength); |
84 } | 85 } |
85 | 86 |
86 | 87 |
87 void BreakLocationIterator::ClearDebugBreakAtSlot() { | 88 void BreakLocationIterator::ClearDebugBreakAtSlot() { |
88 ASSERT(IsDebugBreakSlot()); | 89 ASSERT(IsDebugBreakSlot()); |
89 rinfo()->PatchCode(original_rinfo()->pc(), Assembler::kDebugBreakSlotLength); | 90 rinfo()->PatchCode(original_rinfo()->pc(), Assembler::kDebugBreakSlotLength); |
90 } | 91 } |
91 | 92 |
92 | 93 |
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307 | 308 |
308 const bool Debug::kFrameDropperSupported = true; | 309 const bool Debug::kFrameDropperSupported = true; |
309 | 310 |
310 #undef __ | 311 #undef __ |
311 | 312 |
312 #endif // ENABLE_DEBUGGER_SUPPORT | 313 #endif // ENABLE_DEBUGGER_SUPPORT |
313 | 314 |
314 } } // namespace v8::internal | 315 } } // namespace v8::internal |
315 | 316 |
316 #endif // V8_TARGET_ARCH_X64 | 317 #endif // V8_TARGET_ARCH_X64 |
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