diff -r ef0373b55136 -r 758a864f9613 src/script/api/qscriptengine.cpp
--- a/src/script/api/qscriptengine.cpp	Fri Sep 17 08:34:18 2010 +0300
+++ b/src/script/api/qscriptengine.cpp	Mon Oct 04 01:19:32 2010 +0300
@@ -44,7 +44,6 @@
 
 #include "CodeBlock.h"
 #include "Error.h"
-#include "JSLock.h"
 #include "Interpreter.h"
 
 #include "PrototypeFunction.h"
@@ -152,8 +151,7 @@
   evaluation caused an exception by calling hasUncaughtException(). In
   that case, you can call toString() on the error object to obtain an
   error message. The current uncaught exception is also available
-  through uncaughtException(). You can obtain a human-readable
-  backtrace of the exception with uncaughtExceptionBacktrace().
+  through uncaughtException().
   Calling clearExceptions() will cause any uncaught exceptions to be
   cleared.
 
@@ -784,6 +782,8 @@
 static JSC::JSValue JSC_HOST_CALL functionQsTranslateNoOp(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
 static JSC::JSValue JSC_HOST_CALL functionQsTr(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
 static JSC::JSValue JSC_HOST_CALL functionQsTrNoOp(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
+static JSC::JSValue JSC_HOST_CALL functionQsTrId(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
+static JSC::JSValue JSC_HOST_CALL functionQsTrIdNoOp(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
 
 JSC::JSValue JSC_HOST_CALL functionQsTranslate(JSC::ExecState *exec, JSC::JSObject*, JSC::JSValue, const JSC::ArgList &args)
 {
@@ -894,6 +894,28 @@
     return args.at(0);
 }
 
+JSC::JSValue JSC_HOST_CALL functionQsTrId(JSC::ExecState *exec, JSC::JSObject*, JSC::JSValue, const JSC::ArgList &args)
+{
+    if (args.size() < 1)
+        return JSC::throwError(exec, JSC::GeneralError, "qsTrId() requires at least one argument");
+    if (!args.at(0).isString())
+        return JSC::throwError(exec, JSC::TypeError, "qsTrId(): first argument (id) must be a string");
+    if ((args.size() > 1) && !args.at(1).isNumber())
+        return JSC::throwError(exec, JSC::TypeError, "qsTrId(): second argument (n) must be a number");
+    JSC::UString id = args.at(0).toString(exec);
+    int n = -1;
+    if (args.size() > 1)
+        n = args.at(1).toInt32(exec);
+    return JSC::jsString(exec, qtTrId(QScript::convertToLatin1(id).constData(), n));
+}
+
+JSC::JSValue JSC_HOST_CALL functionQsTrIdNoOp(JSC::ExecState *, JSC::JSObject*, JSC::JSValue, const JSC::ArgList &args)
+{
+    if (args.size() < 1)
+        return JSC::jsUndefined();
+    return args.at(0);
+}
+
 static JSC::JSValue JSC_HOST_CALL stringProtoFuncArg(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, const JSC::ArgList&);
 
 JSC::JSValue JSC_HOST_CALL stringProtoFuncArg(JSC::ExecState *exec, JSC::JSObject*, JSC::JSValue thisObject, const JSC::ArgList &args)
@@ -1003,7 +1025,6 @@
     detachAllRegisteredScriptStrings();
     qDeleteAll(m_qobjectData);
     qDeleteAll(m_typeInfos);
-    JSC::JSLock lock(false);
     globalData->heap.destroy();
     globalData->deref();
     while (freeScriptValues) {
@@ -1292,7 +1313,6 @@
 
 void QScriptEnginePrivate::collectGarbage()
 {
-    JSC::JSLock lock(false);
     QScript::APIShim shim(this);
     globalData->heap.collectAllGarbage();
 }
@@ -1322,7 +1342,6 @@
                                                   bool &compile)
 {
     Q_Q(QScriptEngine);
-    JSC::JSLock lock(false); // ### hmmm
     QBoolBlocker inEvalBlocker(inEval, true);
     q->currentContext()->activationObject(); //force the creation of a context for native function;
 
@@ -2607,8 +2626,7 @@
 }
 
 /*!
-  \internal
-  \since 4.6
+  \since 4.7
 
   Evaluates the given \a program and returns the result of the
   evaluation.
@@ -2800,8 +2818,7 @@
 
   The exception state is cleared when evaluate() is called.
 
-  \sa uncaughtException(), uncaughtExceptionLineNumber(),
-      uncaughtExceptionBacktrace()
+  \sa uncaughtException(), uncaughtExceptionLineNumber()
 */
 bool QScriptEngine::hasUncaughtException() const
 {
@@ -2819,7 +2836,6 @@
   message.
 
   \sa hasUncaughtException(), uncaughtExceptionLineNumber(),
-      uncaughtExceptionBacktrace()
 */
 QScriptValue QScriptEngine::uncaughtException() const
 {
@@ -2839,7 +2855,7 @@
   Line numbers are 1-based, unless a different base was specified as
   the second argument to evaluate().
 
-  \sa hasUncaughtException(), uncaughtExceptionBacktrace()
+  \sa hasUncaughtException()
 */
 int QScriptEngine::uncaughtExceptionLineNumber() const
 {
@@ -2851,7 +2867,7 @@
 /*!
   Returns a human-readable backtrace of the last uncaught exception.
 
-  Each line is of the form \c{<function-name>(<arguments>)@<file-name>:<line-number>}.
+  It is in the form \c{<function-name>()@<file-name>:<line-number>}.
 
   \sa uncaughtException()
 */
@@ -3442,6 +3458,8 @@
     \row    \o QT_TR_NOOP() \o QT_TR_NOOP()
     \row    \o qsTranslate() \o QCoreApplication::translate()
     \row    \o QT_TRANSLATE_NOOP() \o QT_TRANSLATE_NOOP()
+    \row    \o qsTrId() (since 4.7) \o qtTrId()
+    \row    \o QT_TRID_NOOP() (since 4.7) \o QT_TRID_NOOP()
     \endtable
 
   \sa {Internationalization with Qt}
@@ -3460,6 +3478,8 @@
     JSC::asObject(jscObject)->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 2, JSC::Identifier(exec, "QT_TRANSLATE_NOOP"), QScript::functionQsTranslateNoOp));
     JSC::asObject(jscObject)->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 3, JSC::Identifier(exec, "qsTr"), QScript::functionQsTr));
     JSC::asObject(jscObject)->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 1, JSC::Identifier(exec, "QT_TR_NOOP"), QScript::functionQsTrNoOp));
+    JSC::asObject(jscObject)->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 1, JSC::Identifier(exec, "qsTrId"), QScript::functionQsTrId));
+    JSC::asObject(jscObject)->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 1, JSC::Identifier(exec, "QT_TRID_NOOP"), QScript::functionQsTrIdNoOp));
 
     glob->stringPrototype()->putDirectFunction(exec, new (exec)JSC::NativeFunctionWrapper(exec, glob->prototypeFunctionStructure(), 1, JSC::Identifier(exec, "arg"), QScript::stringProtoFuncArg));
 }
@@ -4196,6 +4216,7 @@
                  "cannot set agent belonging to different engine");
         return;
     }
+    QScript::APIShim shim(d);
     if (d->activeAgent)
         QScriptEngineAgentPrivate::get(d->activeAgent)->detach();
     d->activeAgent = agent;