From 9ceeaaac7984523fdc08c2040fcadf5698254c2d Mon Sep 17 00:00:00 2001
From: Andrew Knight <andrew.knight@digia.com>
Date: Fri, 14 Mar 2014 09:00:26 +0200
Subject: WinRT: Add debug message handler for winrtrunner

By placing debug messages in shared memory, the application can share
debug messages with winrtrunner (or any utility which passes -qdevel
to the app and opens the corresponding shared memory area).

Task-number: QTBUG-37308
Change-Id: Id0e04cfd5f0f701d552a448f780788c7cbf9b438
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
---
 src/winmain/qtmain_winrt.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'src')

diff --git a/src/winmain/qtmain_winrt.cpp b/src/winmain/qtmain_winrt.cpp
index 151294d2c4..22d3f5bd91 100644
--- a/src/winmain/qtmain_winrt.cpp
+++ b/src/winmain/qtmain_winrt.cpp
@@ -81,6 +81,27 @@ typedef ITypedEventHandler<Core::CoreApplicationView *, Activation::IActivatedEv
 
 static int g_mainExitCode;
 
+static QtMessageHandler defaultMessageHandler;
+static void devMessageHandler(QtMsgType type, const QMessageLogContext &context, const QString &message)
+{
+#ifndef Q_OS_WINPHONE
+    static HANDLE shmem = 0;
+    static HANDLE event = 0;
+    if (!shmem)
+        shmem = CreateFileMappingFromApp(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 4096, L"qdebug-shmem");
+    if (!event)
+        event = CreateEventEx(NULL, L"qdebug-event", 0, EVENT_ALL_ACCESS);
+
+    void *data = MapViewOfFileFromApp(shmem, FILE_MAP_WRITE, 0, 4096);
+    memset(data, quint32(type), sizeof(quint32));
+    memcpy_s(static_cast<quint32 *>(data) + 1, 4096 - sizeof(quint32),
+             message.data(), (message.length() + 1) * sizeof(wchar_t));
+    UnmapViewOfFile(data);
+    SetEvent(event);
+#endif // !Q_OS_WINPHONE
+    defaultMessageHandler(type, context, message);
+}
+
 class AppContainer : public Microsoft::WRL::RuntimeClass<Core::IFrameworkView>
 {
 public:
@@ -127,6 +148,10 @@ public:
             // (Unused) handle will automatically be closed when the app exits
             CreateFile2(reinterpret_cast<LPCWSTR>(pidFileName.utf16()),
                         0, FILE_SHARE_READ|FILE_SHARE_DELETE, CREATE_ALWAYS, &params);
+            // Install the develMode message handler
+#ifndef Q_OS_WINPHONE
+            defaultMessageHandler = qInstallMessageHandler(devMessageHandler);
+#endif
         }
         // Wait for debugger before continuing
         if (debugWait) {
-- 
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