Pass "this" object when evaluating debug jobs

We have to explicitly specify the "this" object on QV4::Function::call,
otherwise it will assume undefined or the QML global object.

Task-number: QTBUG-66942
Change-Id: I1af7742b4fee1b49e9760a413834daf3edb15d74
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

2 files changed, 16 insertions, 4 deletions

diff --git a/src/plugins/qmltooling/qmldbg_debugger/qv4debugjob.cpp b/src/plugins/qmltooling/qmldbg_debugger/qv4debugjob.cpp
index 5b049ab521..7950d21612 100644
--- a/src/plugins/qmltooling/qmldbg_debugger/qv4debugjob.cpp
+++ b/src/plugins/qmltooling/qmldbg_debugger/qv4debugjob.cpp
@@ -112,8 +112,14 @@ void JavaScriptJob::run()
     script.inheritContext = true;
     script.parse();
     QV4::ScopedValue result(scope);
-    if (!scope.engine->hasException)
-        result = script.run();
+    if (!scope.engine->hasException) {
+        if (frame) {
+            QV4::ScopedValue thisObject(scope, frame->thisObject());
+            result = script.run(thisObject);
+        } else {
+            result = script.run();
+        }
+    }
     if (scope.engine->hasException) {
         result = scope.engine->catchException();
         resultIsException = true;
diff --git a/src/plugins/qmltooling/qmldbg_nativedebugger/qqmlnativedebugservice.cpp b/src/plugins/qmltooling/qmldbg_nativedebugger/qqmlnativedebugservice.cpp
index 718975275a..e17fe92983 100644
--- a/src/plugins/qmltooling/qmldbg_nativedebugger/qqmlnativedebugservice.cpp
+++ b/src/plugins/qmltooling/qmldbg_nativedebugger/qqmlnativedebugservice.cpp
@@ -260,8 +260,14 @@ QV4::ReturnedValue NativeDebugger::evaluateExpression(const QString &expression)
     // That is a side-effect of inheritContext.
     script.inheritContext = true;
     script.parse();
-    if (!m_engine->hasException)
-        return script.run();
+    if (!m_engine->hasException) {
+        if (m_engine->currentStackFrame) {
+            QV4::ScopedValue thisObject(scope, m_engine->currentStackFrame->thisObject());
+            script.run(thisObject);
+        } else {
+            script.run();
+        }
+    }
 
     m_runningJob = false;
     return QV4::Encode::undefined();