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InlineCallFrame.h
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190 lines (159 loc) · 5.95 KB
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/*
* Copyright (C) 2011-2015 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
#ifndef InlineCallFrame_h
#define InlineCallFrame_h
#include "CodeBlock.h"
#include "CodeBlockHash.h"
#include "CodeOrigin.h"
#include "Executable.h"
#include "ValueRecovery.h"
#include "WriteBarrier.h"
#include <wtf/BitVector.h>
#include <wtf/HashMap.h>
#include <wtf/PrintStream.h>
#include <wtf/StdLibExtras.h>
#include <wtf/Vector.h>
namespace JSC {
struct InlineCallFrame;
class ExecState;
class ScriptExecutable;
class JSFunction;
struct InlineCallFrame {
enum Kind {
Call,
Construct,
CallVarargs,
ConstructVarargs,
// For these, the stackOffset incorporates the argument count plus the true return PC
// slot.
GetterCall,
SetterCall
};
static Kind kindFor(CodeSpecializationKind kind)
{
switch (kind) {
case CodeForCall:
return Call;
case CodeForConstruct:
return Construct;
}
RELEASE_ASSERT_NOT_REACHED();
return Call;
}
static Kind varargsKindFor(CodeSpecializationKind kind)
{
switch (kind) {
case CodeForCall:
return CallVarargs;
case CodeForConstruct:
return ConstructVarargs;
}
RELEASE_ASSERT_NOT_REACHED();
return Call;
}
static CodeSpecializationKind specializationKindFor(Kind kind)
{
switch (kind) {
case Call:
case CallVarargs:
case GetterCall:
case SetterCall:
return CodeForCall;
case Construct:
case ConstructVarargs:
return CodeForConstruct;
}
RELEASE_ASSERT_NOT_REACHED();
return CodeForCall;
}
static bool isVarargs(Kind kind)
{
switch (kind) {
case CallVarargs:
case ConstructVarargs:
return true;
default:
return false;
}
}
Vector<ValueRecovery> arguments; // Includes 'this'.
WriteBarrier<ScriptExecutable> executable;
ValueRecovery calleeRecovery;
CodeOrigin caller;
signed stackOffset : 28;
unsigned kind : 3; // real type is Kind
bool isClosureCall : 1; // If false then we know that callee/scope are constants and the DFG won't treat them as variables, i.e. they have to be recovered manually.
VirtualRegister argumentCountRegister; // Only set when we inline a varargs call.
// There is really no good notion of a "default" set of values for
// InlineCallFrame's fields. This constructor is here just to reduce confusion if
// we forgot to initialize explicitly.
InlineCallFrame()
: stackOffset(0)
, kind(Call)
, isClosureCall(false)
{
}
bool isVarargs() const
{
return isVarargs(static_cast<Kind>(kind));
}
CodeSpecializationKind specializationKind() const { return specializationKindFor(static_cast<Kind>(kind)); }
JSFunction* calleeConstant() const;
// Get the callee given a machine call frame to which this InlineCallFrame belongs.
JSFunction* calleeForCallFrame(ExecState*) const;
CString inferredName() const;
CodeBlockHash hash() const;
CString hashAsStringIfPossible() const;
CodeBlock* baselineCodeBlock() const;
void setStackOffset(signed offset)
{
stackOffset = offset;
RELEASE_ASSERT(static_cast<signed>(stackOffset) == offset);
}
ptrdiff_t callerFrameOffset() const { return stackOffset * sizeof(Register) + CallFrame::callerFrameOffset(); }
ptrdiff_t returnPCOffset() const { return stackOffset * sizeof(Register) + CallFrame::returnPCOffset(); }
void dumpBriefFunctionInformation(PrintStream&) const;
void dump(PrintStream&) const;
void dumpInContext(PrintStream&, DumpContext*) const;
MAKE_PRINT_METHOD(InlineCallFrame, dumpBriefFunctionInformation, briefFunctionInformation);
};
inline CodeBlock* baselineCodeBlockForInlineCallFrame(InlineCallFrame* inlineCallFrame)
{
RELEASE_ASSERT(inlineCallFrame);
ScriptExecutable* executable = inlineCallFrame->executable.get();
RELEASE_ASSERT(executable->structure()->classInfo() == FunctionExecutable::info());
return static_cast<FunctionExecutable*>(executable)->baselineCodeBlockFor(inlineCallFrame->specializationKind());
}
inline CodeBlock* baselineCodeBlockForOriginAndBaselineCodeBlock(const CodeOrigin& codeOrigin, CodeBlock* baselineCodeBlock)
{
if (codeOrigin.inlineCallFrame)
return baselineCodeBlockForInlineCallFrame(codeOrigin.inlineCallFrame);
return baselineCodeBlock;
}
} // namespace JSC
namespace WTF {
void printInternal(PrintStream&, JSC::InlineCallFrame::Kind);
} // namespace WTF
#endif // InlineCallFrame_h