QtQml: Always link executable CU on creation

We don't want floating unlinked executable CUs. They should always be
tied to an engine, and the engine should not change. This gives us one
definite point where to register them with the engine (to be done in
subsequent change).

Unfortunately, due to the refcounting, we need to remove the engine from
any still-referenced CUs when the engine itself is destructed. We will
be able to drop the refcounting and make the engine fully own its
executable CUs once we can hold base CUs in most places.

Change-Id: I9a53e83d5c4746c2b2bca896b51baa4fe7fee757
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 7 insertions, 5 deletions

diff --git a/tools/qmljs/qmljs.cpp b/tools/qmljs/qmljs.cpp
index 2b12c4fc9d..99de7f528c 100644
--- a/tools/qmljs/qmljs.cpp
+++ b/tools/qmljs/qmljs.cpp
@@ -105,7 +105,7 @@ int main(int argc, char *argv[])
         if (runAsModule) {
             auto module = vm.loadModule(QUrl::fromLocalFile(QFileInfo(fn).absoluteFilePath()));
             if (module.compiled) {
-                if (module.compiled->instantiate(&vm))
+                if (module.compiled->instantiate())
                     module.compiled->evaluate();
             } else if (module.native) {
                 // Nothing to do. Native modules have no global code.
@@ -120,11 +120,12 @@ int main(int argc, char *argv[])
             }
             QScopedPointer<QV4::Script> script;
             if (useCache && QFile::exists(fn + QLatin1Char('c'))) {
-                QQmlRefPointer<QV4::ExecutableCompilationUnit> unit
-                        = QV4::ExecutableCompilationUnit::create();
+                auto unit = QQml::makeRefPointer<QV4::CompiledData::CompilationUnit>();
                 QString error;
                 if (unit->loadFromDisk(QUrl::fromLocalFile(fn), QFileInfo(fn).lastModified(), &error)) {
-                    script.reset(new QV4::Script(&vm, nullptr, unit));
+                    script.reset(new QV4::Script(
+                            &vm, nullptr, QV4::ExecutableCompilationUnit::create(
+                                                  std::move(unit), &vm)));
                 } else {
                     std::cout << "Error loading" << qPrintable(fn) << "from disk cache:" << qPrintable(error) << std::endl;
                 }
@@ -145,7 +146,8 @@ int main(int argc, char *argv[])
                         const_cast<QV4::CompiledData::Unit*>(unit->unitData())->sourceTimeStamp = QFileInfo(fn).lastModified().toMSecsSinceEpoch();
                     }
                     QString saveError;
-                    if (!unit->saveToDisk(QUrl::fromLocalFile(fn), &saveError)) {
+                    if (!unit->baseCompilationUnit()->saveToDisk(
+                                QUrl::fromLocalFile(fn), &saveError)) {
                         std::cout << "Error saving JS cache file: " << qPrintable(saveError) << std::endl;
                     }
                 }