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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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| 73 } | 73 } |
| 74 | 74 |
| 75 | 75 |
| 76 int JavaScriptFrame::GetProvidedParametersCount() const { | 76 int JavaScriptFrame::GetProvidedParametersCount() const { |
| 77 return ComputeParametersCount(); | 77 return ComputeParametersCount(); |
| 78 } | 78 } |
| 79 | 79 |
| 80 | 80 |
| 81 Address JavaScriptFrame::GetCallerStackPointer() const { | 81 Address JavaScriptFrame::GetCallerStackPointer() const { |
| 82 int arguments; | 82 int arguments; |
| 83 if (Heap::gc_state() != Heap::NOT_IN_GC || disable_heap_access_) { | 83 if (Heap::gc_state() != Heap::NOT_IN_GC) { |
| 84 // The arguments for cooked frames are traversed as if they were | 84 // The arguments for cooked frames are traversed as if they were |
| 85 // expression stack elements of the calling frame. The reason for | 85 // expression stack elements of the calling frame. The reason for |
| 86 // this rather strange decision is that we cannot access the | 86 // this rather strange decision is that we cannot access the |
| 87 // function during mark-compact GCs when the stack is cooked. | 87 // function during mark-compact GCs when the stack is cooked. |
| 88 // In fact accessing heap objects (like function->shared() below) | 88 // In fact accessing heap objects (like function->shared() below) |
| 89 // at all during GC is problematic. | 89 // at all during GC is problematic. |
| 90 arguments = 0; | 90 arguments = 0; |
| 91 } else { | 91 } else { |
| 92 // Compute the number of arguments by getting the number of formal | 92 // Compute the number of arguments by getting the number of formal |
| 93 // parameters of the function. We must remember to take the | 93 // parameters of the function. We must remember to take the |
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| 108 | 108 |
| 109 | 109 |
| 110 Address InternalFrame::GetCallerStackPointer() const { | 110 Address InternalFrame::GetCallerStackPointer() const { |
| 111 // Internal frames have no arguments. The stack pointer of the | 111 // Internal frames have no arguments. The stack pointer of the |
| 112 // caller is at a fixed offset from the frame pointer. | 112 // caller is at a fixed offset from the frame pointer. |
| 113 return fp() + StandardFrameConstants::kCallerSPOffset; | 113 return fp() + StandardFrameConstants::kCallerSPOffset; |
| 114 } | 114 } |
| 115 | 115 |
| 116 | 116 |
| 117 } } // namespace v8::internal | 117 } } // namespace v8::internal |
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