1 // Copyright 2010 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 29 #include "v8.h" 30 31 #include "frames-inl.h" 32 #include "mips/assembler-mips-inl.h" 33 34 namespace v8 { 35 namespace internal { 36 37 38 StackFrame::Type StackFrame::ComputeType(State* state) { 39 ASSERT(state->fp != NULL); 40 if (StandardFrame::IsArgumentsAdaptorFrame(state->fp)) { 41 return ARGUMENTS_ADAPTOR; 42 } 43 // The marker and function offsets overlap. If the marker isn't a 44 // smi then the frame is a JavaScript frame -- and the marker is 45 // really the function. 46 const int offset = StandardFrameConstants::kMarkerOffset; 47 Object* marker = Memory::Object_at(state->fp + offset); 48 if (!marker->IsSmi()) return JAVA_SCRIPT; 49 return static_cast<StackFrame::Type>(Smi::cast(marker)->value()); 50 } 51 52 53 StackFrame::Type ExitFrame::GetStateForFramePointer(Address fp, State* state) { 54 if (fp == 0) return NONE; 55 // Compute frame type and stack pointer. 56 Address sp = fp + ExitFrameConstants::kSPDisplacement; 57 const int offset = ExitFrameConstants::kCodeOffset; 58 Object* code = Memory::Object_at(fp + offset); 59 bool is_debug_exit = code->IsSmi(); 60 if (is_debug_exit) { 61 sp -= kNumJSCallerSaved * kPointerSize; 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 EXIT; 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 UNIMPLEMENTED_MIPS(); 83 return static_cast<Address>(NULL); // UNIMPLEMENTED RETURN 84 } 85 86 87 Address ArgumentsAdaptorFrame::GetCallerStackPointer() const { 88 UNIMPLEMENTED_MIPS(); 89 return static_cast<Address>(NULL); // UNIMPLEMENTED RETURN 90 } 91 92 93 Address InternalFrame::GetCallerStackPointer() const { 94 UNIMPLEMENTED_MIPS(); 95 return static_cast<Address>(NULL); // UNIMPLEMENTED RETURN 96 } 97 98 99 } } // namespace v8::internal 100 101
