Emit a signal when the rendering process exits.

This allows users to implement a "sad tab" feature and/or track
rendering process crashes using a crash reporting service.

Task-number: QTBUG-48227
Change-Id: I97ef934fe5d0912cd0f41967a39052316b3c66b0
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>

14 files changed, 140 insertions, 1 deletions

diff --git a/examples/webengine/quicknanobrowser/BrowserWindow.qml b/examples/webengine/quicknanobrowser/BrowserWindow.qml
index bdee68d17..4d7513fae 100644
--- a/examples/webengine/quicknanobrowser/BrowserWindow.qml
+++ b/examples/webengine/quicknanobrowser/BrowserWindow.qml
@@ -393,6 +393,35 @@ ApplicationWindow {
                     }
                     request.accept()
                 }
+
+                onRenderProcessTerminated: {
+                    var status = ""
+                    switch (terminationStatus) {
+                    case WebEngineView.NormalTerminationStatus:
+                        status = "(normal exit)"
+                        break;
+                    case WebEngineView.AbnormalTerminationStatus:
+                        status = "(abnormal exit)"
+                        break;
+                    case WebEngineView.CrashedTerminationStatus:
+                        status = "(crashed)"
+                        break;
+                    case WebEngineView.KilledTerminationStatus:
+                        status = "(killed)"
+                        break;
+                    }
+
+                    print("Render process exited with code " + exitCode + " " + status)
+                    reloadTimer.running = true
+                }
+
+                Timer {
+                    id: reloadTimer
+                    interval: 0
+                    running: false
+                    repeat: false
+                    onTriggered: currentWebView.reload()
+                }
             }
         }
     }
diff --git a/examples/webenginewidgets/demobrowser/demobrowser.pro b/examples/webenginewidgets/demobrowser/demobrowser.pro
index 310aea59c..0893fe649 100644
--- a/examples/webenginewidgets/demobrowser/demobrowser.pro
+++ b/examples/webenginewidgets/demobrowser/demobrowser.pro
@@ -1,6 +1,7 @@
 TEMPLATE = app
 TARGET = demobrowser
 QT += webenginewidgets network widgets printsupport
+CONFIG += c++11
 
 qtHaveModule(uitools):!embedded: QT += uitools
 else: DEFINES += QT_NO_UITOOLS
diff --git a/examples/webenginewidgets/demobrowser/webview.cpp b/examples/webenginewidgets/demobrowser/webview.cpp
index e454f06c4..c12f3db36 100644
--- a/examples/webenginewidgets/demobrowser/webview.cpp
+++ b/examples/webenginewidgets/demobrowser/webview.cpp
@@ -66,6 +66,7 @@
 
 #include <QtCore/QDebug>
 #include <QtCore/QBuffer>
+#include <QtCore/QTimer>
 
 WebPage::WebPage(QWebEngineProfile *profile, QObject *parent)
     : QWebEnginePage(profile, parent)
@@ -341,6 +342,27 @@ WebView::WebView(QWidget* parent)
             this, SLOT(setProgress(int)));
     connect(this, SIGNAL(loadFinished(bool)),
             this, SLOT(loadFinished(bool)));
+    connect(this, &QWebEngineView::renderProcessTerminated,
+            [=](QWebEnginePage::RenderProcessTerminationStatus termStatus, int statusCode) {
+        const char *status = "";
+        switch (termStatus) {
+        case QWebEnginePage::NormalTerminationStatus:
+            status = "(normal exit)";
+            break;
+        case QWebEnginePage::AbnormalTerminationStatus:
+            status = "(abnormal exit)";
+            break;
+        case QWebEnginePage::CrashedTerminationStatus:
+            status = "(crashed)";
+            break;
+        case QWebEnginePage::KilledTerminationStatus:
+            status = "(killed)";
+            break;
+        }
+
+        qInfo() << "Render process exited with code" << statusCode << status;
+        QTimer::singleShot(0, [this] { reload(); });
+    });
 }
 
 void WebView::setPage(WebPage *_page)
diff --git a/src/core/render_widget_host_view_qt.cpp b/src/core/render_widget_host_view_qt.cpp
index 7ca528954..26ea4f4ae 100644
--- a/src/core/render_widget_host_view_qt.cpp
+++ b/src/core/render_widget_host_view_qt.cpp
@@ -567,8 +567,11 @@ void RenderWidgetHostViewQt::ImeCompositionRangeChanged(const gfx::Range&, const
     QT_NOT_YET_IMPLEMENTED
 }
 
-void RenderWidgetHostViewQt::RenderProcessGone(base::TerminationStatus, int)
+void RenderWidgetHostViewQt::RenderProcessGone(base::TerminationStatus terminationStatus,
+                                               int exitCode)
 {
+    m_adapterClient->renderProcessTerminated(
+                m_adapterClient->renderProcessExitStatus(terminationStatus), exitCode);
     Destroy();
 }
 
diff --git a/src/core/web_contents_adapter.cpp b/src/core/web_contents_adapter.cpp
index 6fb2f5c97..58fd23969 100644
--- a/src/core/web_contents_adapter.cpp
+++ b/src/core/web_contents_adapter.cpp
@@ -900,4 +900,36 @@ void WebContentsAdapter::setWebChannel(QWebChannel *channel)
     channel->connectTo(d->webChannelTransport.get());
 }
 
+WebContentsAdapterClient::RenderProcessTerminationStatus
+WebContentsAdapterClient::renderProcessExitStatus(int terminationStatus) {
+    auto status = WebContentsAdapterClient::RenderProcessTerminationStatus(-1);
+    switch (terminationStatus) {
+    case base::TERMINATION_STATUS_NORMAL_TERMINATION:
+        status = WebContentsAdapterClient::NormalTerminationStatus;
+        break;
+    case base::TERMINATION_STATUS_ABNORMAL_TERMINATION:
+        status = WebContentsAdapterClient::AbnormalTerminationStatus;
+        break;
+    case base::TERMINATION_STATUS_PROCESS_WAS_KILLED:
+#if defined(OS_CHROMEOS)
+    case base::TERMINATION_STATUS_PROCESS_WAS_KILLED_BY_OOM:
+#endif
+        status = WebContentsAdapterClient::KilledTerminationStatus;
+        break;
+    case base::TERMINATION_STATUS_PROCESS_CRASHED:
+#if defined(OS_ANDROID)
+    case base::TERMINATION_STATUS_OOM_PROTECTED:
+#endif
+        status = WebContentsAdapterClient::CrashedTerminationStatus;
+        break;
+    case base::TERMINATION_STATUS_STILL_RUNNING:
+    case base::TERMINATION_STATUS_MAX_ENUM:
+        // should be unreachable since Chromium asserts status != TERMINATION_STATUS_STILL_RUNNING
+        // before calling this method
+        break;
+    }
+
+    return status;
+}
+
 } // namespace QtWebEngineCore
diff --git a/src/core/web_contents_adapter_client.h b/src/core/web_contents_adapter_client.h
index 8166224a4..3ae84f9c8 100644
--- a/src/core/web_contents_adapter_client.h
+++ b/src/core/web_contents_adapter_client.h
@@ -172,6 +172,13 @@ public:
         Error
     };
 
+    enum RenderProcessTerminationStatus {
+        NormalTerminationStatus = 0,
+        AbnormalTerminationStatus,
+        CrashedTerminationStatus,
+        KilledTerminationStatus
+    };
+
     enum MediaRequestFlag {
         MediaNone = 0,
         MediaAudioCapture = 0x01,
@@ -225,6 +232,8 @@ public:
     virtual void showValidationMessage(const QRect &anchor, const QString &mainText, const QString &subText) = 0;
     virtual void hideValidationMessage() = 0;
     virtual void moveValidationMessage(const QRect &anchor) = 0;
+    RenderProcessTerminationStatus renderProcessExitStatus(int);
+    virtual void renderProcessTerminated(RenderProcessTerminationStatus terminationStatus, int exitCode) = 0;
 
     virtual void allowCertificateError(const QSharedPointer<CertificateErrorController> &errorController) = 0;
 
diff --git a/src/webengine/api/qquickwebengineview.cpp b/src/webengine/api/qquickwebengineview.cpp
index 83a6f68bb..b22b2798e 100644
--- a/src/webengine/api/qquickwebengineview.cpp
+++ b/src/webengine/api/qquickwebengineview.cpp
@@ -893,6 +893,14 @@ void QQuickWebEngineViewPrivate::moveValidationMessage(const QRect &anchor)
     ui()->moveMessageBubble(anchor);
 }
 
+void QQuickWebEngineViewPrivate::renderProcessTerminated(
+        RenderProcessTerminationStatus terminationStatus, int exitCode)
+{
+    Q_Q(QQuickWebEngineView);
+    Q_EMIT q->renderProcessTerminated(static_cast<QQuickWebEngineView::RenderProcessTerminationStatus>(
+                                      renderProcessExitStatus(terminationStatus)), exitCode);
+}
+
 bool QQuickWebEngineView::isLoading() const
 {
     Q_D(const QQuickWebEngineView);
diff --git a/src/webengine/api/qquickwebengineview_p.h b/src/webengine/api/qquickwebengineview_p.h
index ab2e6a566..22cca3277 100644
--- a/src/webengine/api/qquickwebengineview_p.h
+++ b/src/webengine/api/qquickwebengineview_p.h
@@ -116,6 +116,7 @@ class Q_WEBENGINE_PRIVATE_EXPORT QQuickWebEngineView : public QQuickItem {
     Q_ENUMS(NewViewDestination);
     Q_ENUMS(Feature);
     Q_ENUMS(JavaScriptConsoleMessageLevel);
+    Q_ENUMS(RenderProcessTerminationStatus);
     Q_FLAGS(FindFlags);
     Q_ENUMS(WebAction);
 
@@ -236,6 +237,14 @@ public:
         ErrorMessageLevel
     };
 
+    // must match WebContentsAdapterClient::RenderProcessTerminationStatus
+    enum RenderProcessTerminationStatus {
+        NormalTerminationStatus = 0,
+        AbnormalTerminationStatus,
+        CrashedTerminationStatus,
+        KilledTerminationStatus
+    };
+
     enum FindFlag {
         FindBackward = 1,
         FindCaseSensitively = 2,
@@ -295,6 +304,7 @@ Q_SIGNALS:
     Q_REVISION(1) void webChannelChanged();
     Q_REVISION(2) void activeFocusOnPressChanged(bool);
     Q_REVISION(2) void backgroundColorChanged();
+    Q_REVISION(2) void renderProcessTerminated(RenderProcessTerminationStatus terminationStatus, int exitCode);
 
 protected:
     void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry);
diff --git a/src/webengine/api/qquickwebengineview_p_p.h b/src/webengine/api/qquickwebengineview_p_p.h
index 4aebb6f7c..0140111b9 100644
--- a/src/webengine/api/qquickwebengineview_p_p.h
+++ b/src/webengine/api/qquickwebengineview_p_p.h
@@ -167,6 +167,8 @@ public:
     virtual void showValidationMessage(const QRect &anchor, const QString &mainText, const QString &subText) Q_DECL_OVERRIDE;
     virtual void hideValidationMessage() Q_DECL_OVERRIDE;
     virtual void moveValidationMessage(const QRect &anchor) Q_DECL_OVERRIDE;
+    virtual void renderProcessTerminated(RenderProcessTerminationStatus terminationStatus,
+                                     int exitCode) Q_DECL_OVERRIDE;
 
     virtual QtWebEngineCore::BrowserContextAdapter *browserContextAdapter() Q_DECL_OVERRIDE;
 
diff --git a/src/webenginewidgets/api/qwebenginepage.cpp b/src/webenginewidgets/api/qwebenginepage.cpp
index b6880b086..80baf1c74 100644
--- a/src/webenginewidgets/api/qwebenginepage.cpp
+++ b/src/webenginewidgets/api/qwebenginepage.cpp
@@ -921,6 +921,14 @@ void QWebEnginePagePrivate::moveValidationMessage(const QRect &anchor)
 #endif
 }
 
+void QWebEnginePagePrivate::renderProcessTerminated(RenderProcessTerminationStatus terminationStatus,
+                                                int exitCode)
+{
+    Q_Q(QWebEnginePage);
+    Q_EMIT q->renderProcessTerminated(static_cast<QWebEnginePage::RenderProcessTerminationStatus>(
+                                      terminationStatus), exitCode);
+}
+
 QMenu *QWebEnginePage::createStandardContextMenu()
 {
     Q_D(QWebEnginePage);
diff --git a/src/webenginewidgets/api/qwebenginepage.h b/src/webenginewidgets/api/qwebenginepage.h
index d027998ee..90fa62f97 100644
--- a/src/webenginewidgets/api/qwebenginepage.h
+++ b/src/webenginewidgets/api/qwebenginepage.h
@@ -165,6 +165,14 @@ public:
         ErrorMessageLevel
     };
 
+    // must match WebContentsAdapterClient::RenderProcessTerminationStatus
+    enum RenderProcessTerminationStatus {
+        NormalTerminationStatus = 0,
+        AbnormalTerminationStatus,
+        CrashedTerminationStatus,
+        KilledTerminationStatus
+    };
+
     explicit QWebEnginePage(QObject *parent = 0);
     QWebEnginePage(QWebEngineProfile *profile, QObject *parent = 0);
     ~QWebEnginePage();
@@ -247,6 +255,8 @@ Q_SIGNALS:
     void authenticationRequired(const QUrl &requestUrl, QAuthenticator *authenticator);
     void proxyAuthenticationRequired(const QUrl &requestUrl, QAuthenticator *authenticator, const QString &proxyHost);
 
+    void renderProcessTerminated(RenderProcessTerminationStatus terminationStatus, int exitCode);
+
     // Ex-QWebFrame signals
     void titleChanged(const QString &title);
     void urlChanged(const QUrl &url);
diff --git a/src/webenginewidgets/api/qwebenginepage_p.h b/src/webenginewidgets/api/qwebenginepage_p.h
index a72debee2..8d9bc2517 100644
--- a/src/webenginewidgets/api/qwebenginepage_p.h
+++ b/src/webenginewidgets/api/qwebenginepage_p.h
@@ -119,6 +119,8 @@ public:
     virtual void showValidationMessage(const QRect &anchor, const QString &mainText, const QString &subText) Q_DECL_OVERRIDE;
     virtual void hideValidationMessage() Q_DECL_OVERRIDE;
     virtual void moveValidationMessage(const QRect &anchor) Q_DECL_OVERRIDE;
+    virtual void renderProcessTerminated(RenderProcessTerminationStatus terminationStatus,
+                                     int exitCode) Q_DECL_OVERRIDE;
 
     virtual QtWebEngineCore::BrowserContextAdapter *browserContextAdapter() Q_DECL_OVERRIDE;
 
diff --git a/src/webenginewidgets/api/qwebengineview.cpp b/src/webenginewidgets/api/qwebengineview.cpp
index a4a8dd760..ddd1e4cbf 100644
--- a/src/webenginewidgets/api/qwebengineview.cpp
+++ b/src/webenginewidgets/api/qwebengineview.cpp
@@ -86,6 +86,7 @@ void QWebEngineViewPrivate::bind(QWebEngineView *view, QWebEnginePage *page)
         QObject::connect(page, &QWebEnginePage::loadProgress, view, &QWebEngineView::loadProgress);
         QObject::connect(page, &QWebEnginePage::loadFinished, view, &QWebEngineView::loadFinished);
         QObject::connect(page, &QWebEnginePage::selectionChanged, view, &QWebEngineView::selectionChanged);
+        QObject::connect(page, &QWebEnginePage::renderProcessTerminated, view, &QWebEngineView::renderProcessTerminated);
     }
 }
 
diff --git a/src/webenginewidgets/api/qwebengineview.h b/src/webenginewidgets/api/qwebengineview.h
index 0d8f9fc17..ae38e6c5c 100644
--- a/src/webenginewidgets/api/qwebengineview.h
+++ b/src/webenginewidgets/api/qwebengineview.h
@@ -113,6 +113,8 @@ Q_SIGNALS:
     void selectionChanged();
     void urlChanged(const QUrl&);
     void iconUrlChanged(const QUrl&);
+    void renderProcessTerminated(QWebEnginePage::RenderProcessTerminationStatus terminationStatus,
+                             int exitCode);
 
 protected:
     virtual QWebEngineView *createWindow(QWebEnginePage::WebWindowType type);