Give our threads debugger-friendly names

qrenderdoc/Code/QRDUtils.cpp

@@ -2275,6 +2275,7 @@ void ShowProgressDialog(QWidget *window, const QString &labelText, ProgressFinis
 
     GUIInvoke::call(&dialog, [&dialog]() { dialog.closeAndReset(); });
   });
+  progressTickerThread.setName(lit("Progress Dialog"));
   progressTickerThread.start();
 
   // show the dialog
@@ -2448,3 +2449,65 @@ void *AccessWaylandPlatformInterface(const QByteArray &resource, QWindow *window
   QPlatformNativeInterface *native = QGuiApplication::platformNativeInterface();
   return native->nativeResourceForWindow(resource, window);
 }
+
+// Default Qt doesn't do this in release Qt builds, which is all we use
+#if defined(Q_OS_WIN32)
+
+#include <windows.h>
+
+typedef HRESULT(WINAPI *PFN_SetThreadDescription)(HANDLE hThread, PCWSTR lpThreadDescription);
+
+const DWORD MS_VC_EXCEPTION = 0x406D1388;
+#pragma pack(push, 8)
+typedef struct tagTHREADNAME_INFO
+{
+  DWORD dwType;        // Must be 0x1000.
+  LPCSTR szName;       // Pointer to name (in user addr space).
+  DWORD dwThreadID;    // Thread ID (-1=caller thread).
+  DWORD dwFlags;       // Reserved for future use, must be zero.
+} THREADNAME_INFO;
+#pragma pack(pop)
+
+static void SetThreadNameWithException(const char *name)
+{
+  THREADNAME_INFO info;
+  info.dwType = 0x1000;
+  info.szName = name;
+  info.dwThreadID = GetCurrentThreadId();
+  info.dwFlags = 0;
+  __try
+  {
+    RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR *)(&info));
+  }
+  __except(EXCEPTION_CONTINUE_EXECUTION)
+  {
+  }
+}
+
+void LambdaThread::windowsSetName()
+{
+  // try to use the fancy modern API
+  static PFN_SetThreadDescription setThreadDesc = (PFN_SetThreadDescription)GetProcAddress(
+      GetModuleHandleA("kernel32.dll"), "SetThreadDescription");
+
+  if(setThreadDesc)
+  {
+    setThreadDesc(GetCurrentThread(), m_Name.toStdWString().c_str());
+  }
+  else
+  {
+    // don't throw the exception if there's no debugger present
+    if(!IsDebuggerPresent())
+      return;
+
+    SetThreadNameWithException(m_Name.toStdString().c_str());
+  }
+}
+
+#else
+
+void LambdaThread::windowsSetName()
+{
+}
+
+#endif