7276f14ca7
Added a few samples and support for building them. The samples include a simple shell that can be used to benchmark and test V8.
Changed V8::GetVersion to return the version as a string.
Added source for lazily loaded scripts to snapshots and made serialization non-destructive.
Improved ARM support by fixing the write barrier code to use aligned loads and stores and by removing premature locals optimization that relied on broken support for callee-saved registers (removed).
Refactored the code for marking live objects during garbage collection and the code for allocating objects in paged spaces. Introduced an abstraction for the map word of a heap-allocated object and changed the memory allocator to allocate executable memory only for spaces that may contain code objects.
Moved StringBuilder to utils.h and ScopedLock to platform.h, where they can be used by debugging and logging modules. Added thread-safe message queues for dealing with debugger events.
Fixed the source code reported by toString for certain builtin empty functions and made sure that the prototype property of a function is enumerable.
Improved performance of converting values to condition flags in generated code.
Merged disassembler-{arch} files.
git-svn-id: http://v8.googlecode.com/svn/trunk@8 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
122 lines
4.6 KiB
C++
122 lines
4.6 KiB
C++
// Copyright 2006-2008 Google Inc. 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"
|
|
|
|
namespace v8 { namespace internal {
|
|
|
|
|
|
StackFrame::Type StackFrame::ComputeType(State* state) {
|
|
ASSERT(state->fp != NULL);
|
|
if (StandardFrame::IsArgumentsAdaptorFrame(state->fp)) {
|
|
return ARGUMENTS_ADAPTOR;
|
|
}
|
|
// The marker and function offsets overlap. If the marker isn't a
|
|
// smi then the frame is a JavaScript frame -- and the marker is
|
|
// really the function.
|
|
const int offset = StandardFrameConstants::kMarkerOffset;
|
|
Object* marker = Memory::Object_at(state->fp + offset);
|
|
if (!marker->IsSmi()) return JAVA_SCRIPT;
|
|
return static_cast<StackFrame::Type>(Smi::cast(marker)->value());
|
|
}
|
|
|
|
|
|
StackFrame::Type ExitFrame::GetStateForFramePointer(Address fp, State* state) {
|
|
if (fp == 0) return NONE;
|
|
// Compute the stack pointer.
|
|
Address sp = Memory::Address_at(fp + ExitFrameConstants::kSPOffset);
|
|
// Fill in the state.
|
|
state->fp = fp;
|
|
state->sp = sp;
|
|
state->pc_address = reinterpret_cast<Address*>(sp - 1 * kPointerSize);
|
|
// Determine frame type.
|
|
if (Memory::Address_at(fp + ExitFrameConstants::kDebugMarkOffset) != 0) {
|
|
return EXIT_DEBUG;
|
|
} else {
|
|
return EXIT;
|
|
}
|
|
}
|
|
|
|
|
|
void ExitFrame::Iterate(ObjectVisitor* v) const {
|
|
// Exit frames on IA-32 do not contain any pointers. The arguments
|
|
// are traversed as part of the expression stack of the calling
|
|
// frame.
|
|
}
|
|
|
|
|
|
int JavaScriptFrame::GetProvidedParametersCount() const {
|
|
return ComputeParametersCount();
|
|
}
|
|
|
|
|
|
Address JavaScriptFrame::GetCallerStackPointer() const {
|
|
int arguments;
|
|
if (Heap::gc_state() != Heap::NOT_IN_GC) {
|
|
// The arguments for cooked frames are traversed as if they were
|
|
// expression stack elements of the calling frame. The reason for
|
|
// this rather strange decision is that we cannot access the
|
|
// function during mark-compact GCs when the stack is cooked.
|
|
// In fact accessing heap objects (like function->shared() below)
|
|
// at all during GC is problematic.
|
|
arguments = 0;
|
|
} else {
|
|
// Compute the number of arguments by getting the number of formal
|
|
// parameters of the function. We must remember to take the
|
|
// receiver into account (+1).
|
|
JSFunction* function = JSFunction::cast(this->function());
|
|
arguments = function->shared()->formal_parameter_count() + 1;
|
|
}
|
|
const int offset = StandardFrameConstants::kCallerSPOffset;
|
|
return fp() + offset + (arguments * kPointerSize);
|
|
}
|
|
|
|
|
|
Address ArgumentsAdaptorFrame::GetCallerStackPointer() const {
|
|
const int arguments = Smi::cast(GetExpression(0))->value();
|
|
const int offset = StandardFrameConstants::kCallerSPOffset;
|
|
return fp() + offset + (arguments + 1) * kPointerSize;
|
|
}
|
|
|
|
|
|
Address InternalFrame::GetCallerStackPointer() const {
|
|
// Internal frames have no arguments. The stack pointer of the
|
|
// caller is at a fixed offset from the frame pointer.
|
|
return fp() + StandardFrameConstants::kCallerSPOffset;
|
|
}
|
|
|
|
|
|
Code* JavaScriptFrame::FindCode() const {
|
|
JSFunction* function = JSFunction::cast(this->function());
|
|
return function->shared()->code();
|
|
}
|
|
|
|
|
|
} } // namespace v8::internal
|