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
34namespace v8 {
35namespace internal {
36
37
38StackFrame::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
53StackFrame::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
71void ExitFrame::Iterate(ObjectVisitor* v) const {
72  // Do nothing
73}
74
75
76int JavaScriptFrame::GetProvidedParametersCount() const {
77  return ComputeParametersCount();
78}
79
80
81Address JavaScriptFrame::GetCallerStackPointer() const {
82  UNIMPLEMENTED_MIPS();
83  return static_cast<Address>(NULL);  // UNIMPLEMENTED RETURN
84}
85
86
87Address ArgumentsAdaptorFrame::GetCallerStackPointer() const {
88  UNIMPLEMENTED_MIPS();
89  return static_cast<Address>(NULL);  // UNIMPLEMENTED RETURN
90}
91
92
93Address InternalFrame::GetCallerStackPointer() const {
94  UNIMPLEMENTED_MIPS();
95  return static_cast<Address>(NULL);  // UNIMPLEMENTED RETURN
96}
97
98
99} }  // namespace v8::internal
100
101