QML: Invalidate any existing cache files when saving a CU to disk

Otherwise we just re-load the old cache file next time. That's clearly
not intended.

Fixes: QTBUG-111078
Change-Id: Ia65b46880eca2b6e8c4792a09f20716125beada3
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
(cherry picked from commit 0a5eff09203ebb2547431de689d9c07e6c97f636)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

3 files changed, 20 insertions, 2 deletions

diff --git a/src/qml/jsruntime/qv4compilationunitmapper.cpp b/src/qml/jsruntime/qv4compilationunitmapper.cpp
index da11c29caf..1b96300cdf 100644
--- a/src/qml/jsruntime/qv4compilationunitmapper.cpp
+++ b/src/qml/jsruntime/qv4compilationunitmapper.cpp
@@ -65,6 +65,11 @@ public:
         s_staticUnits.insert(file, staticUnit);
     }
 
+    void remove(const QString &file)
+    {
+        s_staticUnits.remove(file);
+    }
+
 private:
     QMutexLocker<QMutex> m_lock;
 
@@ -105,4 +110,10 @@ CompiledData::Unit *CompilationUnitMapper::get(
     return data;
 }
 
+void CompilationUnitMapper::invalidate(const QString &cacheFilePath)
+{
+    StaticUnitCache cache;
+    cache.remove(cacheFilePath);
+}
+
 QT_END_NAMESPACE
diff --git a/src/qml/jsruntime/qv4compilationunitmapper_p.h b/src/qml/jsruntime/qv4compilationunitmapper_p.h
index 353237ce35..1def1ed468 100644
--- a/src/qml/jsruntime/qv4compilationunitmapper_p.h
+++ b/src/qml/jsruntime/qv4compilationunitmapper_p.h
@@ -69,6 +69,7 @@ public:
 
     CompiledData::Unit *get(
             const QString &cacheFilePath, const QDateTime &sourceTimeStamp, QString *errorString);
+    static void invalidate(const QString &cacheFilePath);
 
 private:
     CompiledData::Unit *open(
diff --git a/src/qml/jsruntime/qv4executablecompilationunit.cpp b/src/qml/jsruntime/qv4executablecompilationunit.cpp
index 4de044377b..f48e2dda96 100644
--- a/src/qml/jsruntime/qv4executablecompilationunit.cpp
+++ b/src/qml/jsruntime/qv4executablecompilationunit.cpp
@@ -857,8 +857,14 @@ bool ExecutableCompilationUnit::saveToDisk(const QUrl &unitUrl, QString *errorSt
 
     return CompiledData::SaveableUnitPointer(unitData()).saveToDisk<char>(
             [&unitUrl, errorString](const char *data, quint32 size) {
-        return CompiledData::SaveableUnitPointer::writeDataToFile(localCacheFilePath(unitUrl), data,
-                                                                  size, errorString);
+        const QString cachePath = localCacheFilePath(unitUrl);
+        if (CompiledData::SaveableUnitPointer::writeDataToFile(
+                    cachePath, data, size, errorString)) {
+            CompilationUnitMapper::invalidate(cachePath);
+            return true;
+        }
+
+        return false;
     });
 }