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/**
* This source code is licensed under the terms found in the LICENSE file in
* node-jsc's root directory.
*/
#include "config.h"
#include "CallSite.h"
#include "helpers.h"
#include <JavaScriptCore/JSCInlines.h>
using namespace JSC;
using namespace WebCore;
namespace Zig {
const JSC::ClassInfo CallSite::s_info = { "CallSite"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(CallSite) };
void CallSite::finishCreation(VM& vm, JSC::JSGlobalObject* globalObject, JSCStackFrame& stackFrame, bool encounteredStrictFrame)
{
Base::finishCreation(vm);
/* From v8's "Stack Trace API" (https://github.com/v8/v8/wiki/Stack-Trace-API):
* "To maintain restrictions imposed on strict mode functions, frames that have a
* strict mode function and all frames below (its caller etc.) are not allow to access
* their receiver and function objects. For those frames, getFunction() and getThis()
* will return undefined.".
* Thus, if we've already encountered a strict frame, we'll treat our frame as strict too. */
bool isStrictFrame = encounteredStrictFrame;
if (!isStrictFrame) {
JSC::CodeBlock* codeBlock = stackFrame.codeBlock();
if (codeBlock) {
isStrictFrame = codeBlock->ownerExecutable()->isInStrictContext();
}
}
JSC::JSObject* calleeObject = JSC::jsCast<JSC::JSObject*>(stackFrame.callee());
// Initialize "this" and "function" (and set the "IsStrict" flag if needed)
JSC::CallFrame* callFrame = stackFrame.callFrame();
if (isStrictFrame) {
m_thisValue.set(vm, this, JSC::jsUndefined());
m_function.set(vm, this, JSC::jsUndefined());
m_flags |= static_cast<unsigned int>(Flags::IsStrict);
} else {
if (callFrame) {
// We know that we're not in strict mode
m_thisValue.set(vm, this, callFrame->thisValue().toThis(globalObject, JSC::ECMAMode::sloppy()));
} else {
m_thisValue.set(vm, this, JSC::jsUndefined());
}
m_function.set(vm, this, stackFrame.callee());
}
m_functionName.set(vm, this, stackFrame.functionName());
m_sourceURL.set(vm, this, stackFrame.sourceURL());
const auto* sourcePositions = stackFrame.getSourcePositions();
if (sourcePositions) {
m_lineNumber = JSC::jsNumber(sourcePositions->line.oneBasedInt());
m_columnNumber = JSC::jsNumber(sourcePositions->startColumn.oneBasedInt());
}
if (stackFrame.isEval()) {
m_flags |= static_cast<unsigned int>(Flags::IsEval);
}
if (stackFrame.isConstructor()) {
m_flags |= static_cast<unsigned int>(Flags::IsConstructor);
}
if (!stackFrame.codeBlock()) {
m_flags |= static_cast<unsigned int>(Flags::IsNative);
}
}
void CallSite::finishCreationWithFrame(VM& vm, JSC::JSGlobalObject* globalObject, JSC::StackFrame& stackFrame, bool encounteredStrictFrame)
{
Base::finishCreation(vm);
bool isStrictFrame = encounteredStrictFrame;
if (!isStrictFrame) {
JSC::CodeBlock* codeBlock = stackFrame.codeBlock();
if (codeBlock) {
isStrictFrame = codeBlock->ownerExecutable()->isInStrictContext();
}
}
JSObject* calleeObject = jsCast<JSObject*>(stackFrame.callee());
m_thisValue.set(vm, this, JSC::jsUndefined());
if (isStrictFrame) {
m_function.set(vm, this, JSC::jsUndefined());
m_flags |= static_cast<unsigned int>(Flags::IsStrict);
} else {
m_function.set(vm, this, stackFrame.callee());
}
// m_functionName.set(vm, this, stackFrame.functionName(vm));
// m_sourceURL.set(vm, this, stackFrame.sourceURL(vm));
unsigned int line = 0;
unsigned int column = 0;
stackFrame.computeLineAndColumn(line, column);
m_lineNumber = jsNumber(line + 1);
m_columnNumber = jsNumber(column + 1);
if (!stackFrame.codeBlock()) {
m_flags |= static_cast<unsigned int>(Flags::IsNative);
} else {
if (stackFrame.codeBlock()->codeType() == EvalCode) {
m_flags |= static_cast<unsigned int>(Flags::IsEval);
}
}
}
template<typename Visitor>
void CallSite::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
CallSite* thisCallSite = jsCast<CallSite*>(cell);
Base::visitChildren(thisCallSite, visitor);
visitor.append(thisCallSite->m_thisValue);
visitor.append(thisCallSite->m_function);
visitor.append(thisCallSite->m_functionName);
visitor.append(thisCallSite->m_sourceURL);
}
void CallSite::formatAsString(JSC::VM& vm, JSC::JSGlobalObject* globalObject, WTF::StringBuilder& sb)
{
JSString* myTypeName = jsTypeStringForValue(globalObject, thisValue());
JSString* myFunction = functionName().toString(globalObject);
JSString* myFunctionName = functionName().toString(globalObject);
JSString* mySourceURL = sourceURL().toString(globalObject);
JSString* myColumnNumber = columnNumber().toInt32(globalObject) != -1 ? columnNumber().toString(globalObject) : jsEmptyString(vm);
JSString* myLineNumber = lineNumber().toInt32(globalObject) != -1 ? lineNumber().toString(globalObject) : jsEmptyString(vm);
bool myIsConstructor = isConstructor();
if (myFunctionName->length() > 0) {
if (myIsConstructor) {
sb.append("new "_s);
} else {
// TODO: print type or class name if available
// sb.append(myTypeName->getString(globalObject));
// sb.append(" "_s);
}
sb.append(myFunctionName->getString(globalObject));
} else {
sb.append("<anonymous>"_s);
}
sb.append(" ("_s);
if (isNative()) {
sb.append("native"_s);
} else {
sb.append(mySourceURL->getString(globalObject));
sb.append(":"_s);
sb.append(myLineNumber->getString(globalObject));
sb.append(":"_s);
sb.append(myColumnNumber->getString(globalObject));
}
sb.append(")"_s);
}
DEFINE_VISIT_CHILDREN(CallSite);
}
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