v8/src/frames-arm.cc

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// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "v8.h"
#include "frames-inl.h"
#include "assembler-arm-inl.h"
namespace v8 { namespace internal {
StackFrame::Type StackFrame::ComputeType(State* state) {
ASSERT(state->fp != NULL);
if (state->pp == NULL) {
if (Memory::Address_at(state->fp +
EntryFrameConstants::kConstructMarkOffset) != 0) {
return ENTRY_CONSTRUCT;
} else {
return ENTRY;
}
} else if (StandardFrame::IsArgumentsAdaptorFrame(state->fp)) {
return ARGUMENTS_ADAPTOR;
} else if (
Memory::Object_at(state->fp +
StandardFrameConstants::kFunctionOffset)->IsSmi()) {
return INTERNAL;
} else {
return JAVA_SCRIPT;
}
}
StackFrame::Type ExitFrame::GetStateForFramePointer(Address fp, State* state) {
if (fp == 0) return NONE;
// Compute frame type and stack pointer.
Address sp = fp + ExitFrameConstants::kSPDisplacement;
Type type;
if (Memory::Address_at(fp + ExitFrameConstants::kDebugMarkOffset) != 0) {
type = EXIT_DEBUG;
sp -= kNumJSCallerSaved * kPointerSize;
} else {
type = EXIT;
}
// Fill in the state.
state->sp = sp;
state->fp = fp;
state->pp = fp + ExitFrameConstants::kPPDisplacement;
state->pc_address = reinterpret_cast<Address*>(sp - 1 * kPointerSize);
return type;
}
void ExitFrame::Iterate(ObjectVisitor* v) const {
// Do nothing
}
int JavaScriptFrame::GetProvidedParametersCount() const {
const int offset = JavaScriptFrameConstants::kArgsLengthOffset;
int result = Memory::int_at(fp() + offset);
// We never remove extra parameters provided on the stack; we only
// fill in undefined values for parameters not provided.
ASSERT(0 <= result && result <= ComputeParametersCount());
return result;
}
Address JavaScriptFrame::GetCallerStackPointer() const {
return state_.pp;
}
Address ArgumentsAdaptorFrame::GetCallerStackPointer() const {
// Argument adaptor frames aren't used on ARM (yet).
UNIMPLEMENTED();
return 0;
}
Address InternalFrame::GetCallerStackPointer() const {
return state_.pp;
}
Code* JavaScriptFrame::FindCode() const {
const int offset = StandardFrameConstants::kCodeOffset;
Object* code = Memory::Object_at(fp() + offset);
if (code == NULL) {
// The code object isn't set; find it and set it.
code = Heap::FindCodeObject(pc());
ASSERT(!code->IsFailure());
Memory::Object_at(fp() + offset) = code;
}
ASSERT(code != NULL);
return Code::cast(code);
}
} } // namespace v8::internal