#include "config.h"
#include "JSContextRef.h"
#include "JSContextRefPrivate.h"
#include "APICast.h"
#include "InitializeThreading.h"
#include <interpreter/CallFrame.h>
#include <interpreter/Interpreter.h>
#include "JSCallbackObject.h"
#include "JSClassRef.h"
#include "JSGlobalObject.h"
#include "JSObject.h"
#include "UStringBuilder.h"
#include <wtf/text/StringHash.h>
#if OS(DARWIN)
#include <mach-o/dyld.h>
static const int32_t webkitFirstVersionWithConcurrentGlobalContexts = 0x2100500; #endif
using namespace JSC;
JSContextGroupRef JSContextGroupCreate()
{
initializeThreading();
return toRef(JSGlobalData::createContextGroup(ThreadStackTypeSmall).leakRef());
}
JSContextGroupRef JSContextGroupRetain(JSContextGroupRef group)
{
toJS(group)->ref();
return group;
}
void JSContextGroupRelease(JSContextGroupRef group)
{
toJS(group)->deref();
}
JSGlobalContextRef JSGlobalContextCreate(JSClassRef globalObjectClass)
{
initializeThreading();
#if OS(DARWIN)
if (NSVersionOfLinkTimeLibrary("JavaScriptCore") <= webkitFirstVersionWithConcurrentGlobalContexts) {
return JSGlobalContextCreateInGroup(toRef(&JSGlobalData::sharedInstance()), globalObjectClass);
}
#endif // OS(DARWIN)
return JSGlobalContextCreateInGroup(0, globalObjectClass);
}
JSGlobalContextRef JSGlobalContextCreateInGroup(JSContextGroupRef group, JSClassRef globalObjectClass)
{
initializeThreading();
RefPtr<JSGlobalData> globalData = group ? PassRefPtr<JSGlobalData>(toJS(group)) : JSGlobalData::createContextGroup(ThreadStackTypeSmall);
APIEntryShim entryShim(globalData.get(), false);
globalData->makeUsableFromMultipleThreads();
if (!globalObjectClass) {
JSGlobalObject* globalObject = JSGlobalObject::create(*globalData, JSGlobalObject::createStructure(*globalData, jsNull()));
return JSGlobalContextRetain(toGlobalRef(globalObject->globalExec()));
}
JSGlobalObject* globalObject = JSCallbackObject<JSGlobalObject>::create(*globalData, globalObjectClass, JSCallbackObject<JSGlobalObject>::createStructure(*globalData, 0, jsNull()));
ExecState* exec = globalObject->globalExec();
JSValue prototype = globalObjectClass->prototype(exec);
if (!prototype)
prototype = jsNull();
globalObject->resetPrototype(*globalData, prototype);
return JSGlobalContextRetain(toGlobalRef(exec));
}
JSGlobalContextRef JSGlobalContextRetain(JSGlobalContextRef ctx)
{
ExecState* exec = toJS(ctx);
APIEntryShim entryShim(exec);
JSGlobalData& globalData = exec->globalData();
gcProtect(exec->dynamicGlobalObject());
globalData.ref();
return ctx;
}
void JSGlobalContextRelease(JSGlobalContextRef ctx)
{
IdentifierTable* savedIdentifierTable;
ExecState* exec = toJS(ctx);
{
JSLockHolder lock(exec);
JSGlobalData& globalData = exec->globalData();
savedIdentifierTable = wtfThreadData().setCurrentIdentifierTable(globalData.identifierTable);
bool protectCountIsZero = Heap::heap(exec->dynamicGlobalObject())->unprotect(exec->dynamicGlobalObject());
if (protectCountIsZero)
globalData.heap.reportAbandonedObjectGraph();
globalData.deref();
}
wtfThreadData().setCurrentIdentifierTable(savedIdentifierTable);
}
JSObjectRef JSContextGetGlobalObject(JSContextRef ctx)
{
ExecState* exec = toJS(ctx);
APIEntryShim entryShim(exec);
return toRef(exec->lexicalGlobalObject()->methodTable()->toThisObject(exec->lexicalGlobalObject(), exec));
}
JSContextGroupRef JSContextGetGroup(JSContextRef ctx)
{
ExecState* exec = toJS(ctx);
return toRef(&exec->globalData());
}
JSGlobalContextRef JSContextGetGlobalContext(JSContextRef ctx)
{
ExecState* exec = toJS(ctx);
APIEntryShim entryShim(exec);
return toGlobalRef(exec->lexicalGlobalObject()->globalExec());
}
JSStringRef JSContextCreateBacktrace(JSContextRef ctx, unsigned maxStackSize)
{
ExecState* exec = toJS(ctx);
JSLockHolder lock(exec);
unsigned count = 0;
UStringBuilder builder;
CallFrame* callFrame = exec;
UString functionName;
if (exec->callee()) {
if (asObject(exec->callee())->inherits(&InternalFunction::s_info)) {
functionName = asInternalFunction(exec->callee())->name(exec);
builder.append("#0 ");
builder.append(functionName);
builder.append("() ");
count++;
}
}
while (true) {
ASSERT(callFrame);
int signedLineNumber;
intptr_t sourceID;
UString urlString;
JSValue function;
UString levelStr = UString::number(count);
exec->interpreter()->retrieveLastCaller(callFrame, signedLineNumber, sourceID, urlString, function);
if (function)
functionName = jsCast<JSFunction*>(function)->name(exec);
else {
if (count)
break;
}
unsigned lineNumber = signedLineNumber >= 0 ? signedLineNumber : 0;
if (!builder.isEmpty())
builder.append("\n");
builder.append("#");
builder.append(levelStr);
builder.append(" ");
builder.append(functionName);
builder.append("() at ");
builder.append(urlString);
builder.append(":");
builder.append(UString::number(lineNumber));
if (!function || ++count == maxStackSize)
break;
callFrame = callFrame->callerFrame();
}
return OpaqueJSString::create(builder.toUString()).leakRef();
}