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main_repo / deps / v8 / src / frames-ia32.cc @ 40c0f755
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// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h" |
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#include "frames-inl.h" |
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namespace v8 { namespace internal { |
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StackFrame::Type StackFrame::ComputeType(State* state) { |
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ASSERT(state->fp != NULL);
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if (StandardFrame::IsArgumentsAdaptorFrame(state->fp)) {
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return ARGUMENTS_ADAPTOR;
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} |
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// The marker and function offsets overlap. If the marker isn't a
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// smi then the frame is a JavaScript frame -- and the marker is
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// really the function.
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const int offset = StandardFrameConstants::kMarkerOffset; |
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Object* marker = Memory::Object_at(state->fp + offset); |
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if (!marker->IsSmi()) return JAVA_SCRIPT; |
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return static_cast<StackFrame::Type>(Smi::cast(marker)->value()); |
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} |
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StackFrame::Type ExitFrame::GetStateForFramePointer(Address fp, State* state) { |
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if (fp == 0) return NONE; |
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// Compute the stack pointer.
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Address sp = Memory::Address_at(fp + ExitFrameConstants::kSPOffset); |
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// Fill in the state.
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state->fp = fp; |
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state->sp = sp; |
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state->pc_address = reinterpret_cast<Address*>(sp - 1 * kPointerSize); |
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// Determine frame type.
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if (Memory::Address_at(fp + ExitFrameConstants::kDebugMarkOffset) != 0) { |
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return EXIT_DEBUG;
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} else {
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return EXIT;
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} |
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} |
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void ExitFrame::Iterate(ObjectVisitor* v) const { |
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// Exit frames on IA-32 do not contain any pointers. The arguments
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// are traversed as part of the expression stack of the calling
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// frame.
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} |
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int JavaScriptFrame::GetProvidedParametersCount() const { |
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return ComputeParametersCount();
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} |
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Address JavaScriptFrame::GetCallerStackPointer() const {
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int arguments;
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if (Heap::gc_state() != Heap::NOT_IN_GC || disable_heap_access_) {
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// The arguments for cooked frames are traversed as if they were
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// expression stack elements of the calling frame. The reason for
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// this rather strange decision is that we cannot access the
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// function during mark-compact GCs when the stack is cooked.
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// In fact accessing heap objects (like function->shared() below)
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// at all during GC is problematic.
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arguments = 0;
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} else {
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// Compute the number of arguments by getting the number of formal
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// parameters of the function. We must remember to take the
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// receiver into account (+1).
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JSFunction* function = JSFunction::cast(this->function());
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arguments = function->shared()->formal_parameter_count() + 1;
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} |
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const int offset = StandardFrameConstants::kCallerSPOffset; |
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return fp() + offset + (arguments * kPointerSize);
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} |
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Address ArgumentsAdaptorFrame::GetCallerStackPointer() const {
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const int arguments = Smi::cast(GetExpression(0))->value(); |
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const int offset = StandardFrameConstants::kCallerSPOffset; |
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return fp() + offset + (arguments + 1) * kPointerSize; |
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} |
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Address InternalFrame::GetCallerStackPointer() const {
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// Internal frames have no arguments. The stack pointer of the
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// caller is at a fixed offset from the frame pointer.
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return fp() + StandardFrameConstants::kCallerSPOffset;
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} |
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} } // namespace v8::internal
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