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| 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | |
| 2 // Redistribution and use in source and binary forms, with or without | |
| 3 // modification, are permitted provided that the following conditions are | |
| 4 // met: | |
| 5 // | |
| 6 // * Redistributions of source code must retain the above copyright | |
| 7 // notice, this list of conditions and the following disclaimer. | |
| 8 // * Redistributions in binary form must reproduce the above | |
| 9 // copyright notice, this list of conditions and the following | |
| 10 // disclaimer in the documentation and/or other materials provided | |
| 11 // with the distribution. | |
| 12 // * Neither the name of Google Inc. nor the names of its | |
| 13 // contributors may be used to endorse or promote products derived | |
| 14 // from this software without specific prior written permission. | |
| 15 // | |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | |
| 28 #include "v8.h" | |
| 29 | |
| 30 #include "frames-inl.h" | |
| 31 #include "assembler-arm-inl.h" | |
| 32 | |
| 33 | |
| 34 namespace v8 { namespace internal { | |
| 35 | |
| 36 | |
| 37 StackFrame::Type StackFrame::ComputeType(State* state) { | |
| 38 ASSERT(state->fp != NULL); | |
| 39 if (StandardFrame::IsArgumentsAdaptorFrame(state->fp)) { | |
| 40 return ARGUMENTS_ADAPTOR; | |
| 41 } | |
| 42 // The marker and function offsets overlap. If the marker isn't a | |
| 43 // smi then the frame is a JavaScript frame -- and the marker is | |
| 44 // really the function. | |
| 45 const int offset = StandardFrameConstants::kMarkerOffset; | |
| 46 Object* marker = Memory::Object_at(state->fp + offset); | |
| 47 if (!marker->IsSmi()) return JAVA_SCRIPT; | |
| 48 return static_cast<StackFrame::Type>(Smi::cast(marker)->value()); | |
| 49 } | |
| 50 | |
| 51 | |
| 52 StackFrame::Type ExitFrame::GetStateForFramePointer(Address fp, State* state) { | |
| 53 if (fp == 0) return NONE; | |
| 54 // Compute frame type and stack pointer. | |
| 55 Address sp = fp + ExitFrameConstants::kSPDisplacement; | |
| 56 Type type; | |
| 57 if (Memory::Address_at(fp + ExitFrameConstants::kDebugMarkOffset) != 0) { | |
| 58 type = EXIT_DEBUG; | |
| 59 sp -= kNumJSCallerSaved * kPointerSize; | |
| 60 } else { | |
| 61 type = EXIT; | |
| 62 } | |
| 63 // Fill in the state. | |
| 64 state->sp = sp; | |
| 65 state->fp = fp; | |
| 66 state->pc_address = reinterpret_cast<Address*>(sp - 1 * kPointerSize); | |
| 67 return type; | |
| 68 } | |
| 69 | |
| 70 | |
| 71 void ExitFrame::Iterate(ObjectVisitor* v) const { | |
| 72 // Do nothing | |
| 73 } | |
| 74 | |
| 75 | |
| 76 int JavaScriptFrame::GetProvidedParametersCount() const { | |
| 77 return ComputeParametersCount(); | |
| 78 } | |
| 79 | |
| 80 | |
| 81 Address JavaScriptFrame::GetCallerStackPointer() const { | |
| 82 int arguments; | |
| 83 if (Heap::gc_state() != Heap::NOT_IN_GC || disable_heap_access_) { | |
| 84 // The arguments for cooked frames are traversed as if they were | |
| 85 // expression stack elements of the calling frame. The reason for | |
| 86 // this rather strange decision is that we cannot access the | |
| 87 // function during mark-compact GCs when the stack is cooked. | |
| 88 // In fact accessing heap objects (like function->shared() below) | |
| 89 // at all during GC is problematic. | |
| 90 arguments = 0; | |
| 91 } else { | |
| 92 // Compute the number of arguments by getting the number of formal | |
| 93 // parameters of the function. We must remember to take the | |
| 94 // receiver into account (+1). | |
| 95 JSFunction* function = JSFunction::cast(this->function()); | |
| 96 arguments = function->shared()->formal_parameter_count() + 1; | |
| 97 } | |
| 98 const int offset = StandardFrameConstants::kCallerSPOffset; | |
| 99 return fp() + offset + (arguments * kPointerSize); | |
| 100 } | |
| 101 | |
| 102 | |
| 103 Address ArgumentsAdaptorFrame::GetCallerStackPointer() const { | |
| 104 const int arguments = Smi::cast(GetExpression(0))->value(); | |
| 105 const int offset = StandardFrameConstants::kCallerSPOffset; | |
| 106 return fp() + offset + (arguments + 1) * kPointerSize; | |
| 107 } | |
| 108 | |
| 109 | |
| 110 Address InternalFrame::GetCallerStackPointer() const { | |
| 111 // Internal frames have no arguments. The stack pointer of the | |
| 112 // caller is at a fixed offset from the frame pointer. | |
| 113 return fp() + StandardFrameConstants::kCallerSPOffset; | |
| 114 } | |
| 115 | |
| 116 | |
| 117 } } // namespace v8::internal | |
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Chromium Code Reviews
Issue 92068:
Move backend specific files to separate directories. (Closed)
