1 files changed, 52 insertions, 0 deletions
diff --git a/src/libs/3rdparty/winpty/misc/Win10ResizeWhileFrozen.cc b/src/libs/3rdparty/winpty/misc/Win10ResizeWhileFrozen.cc
new file mode 100644
index 0000000000..82feaf3c50
--- /dev/null
+++ b/src/libs/3rdparty/winpty/misc/Win10ResizeWhileFrozen.cc
@@ -0,0 +1,52 @@
+/*
+ * Demonstrates a conhost hang that occurs when widening the console buffer
+ * while selection is in progress.  The problem affects the new Windows 10
+ * console, not the "legacy" console mode that Windows 10 also includes.
+ *
+ * First tested with:
+ *  - Windows 10.0.10240
+ *  - conhost.exe version 10.0.10240.16384
+ *  - ConhostV1.dll version 10.0.10240.16384
+ *  - ConhostV2.dll version 10.0.10240.16391
+ */
+
+#include <windows.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <wchar.h>
+
+#include "TestUtil.cc"
+
+const int SC_CONSOLE_MARK = 0xFFF2;
+const int SC_CONSOLE_SELECT_ALL = 0xFFF5;
+
+int main(int argc, char *argv[]) {
+    if (argc == 1) {
+        startChildProcess(L"CHILD");
+        return 0;
+    }
+
+    setWindowPos(0, 0, 1, 1);
+    setBufferSize(80, 25);
+    setWindowPos(0, 0, 80, 25);
+
+    countDown(5);
+
+    SendMessage(GetConsoleWindow(), WM_SYSCOMMAND, SC_CONSOLE_SELECT_ALL, 0);
+    Sleep(2000);
+
+    // This API call does not return.  In the console window, the "Select All"
+    // operation appears to end.  The console window becomes non-responsive,
+    // and the conhost.exe process must be killed from the Task Manager.
+    // (Killing this test program or closing the console window is not
+    // sufficient.)
+    //
+    // The same hang occurs whether line resizing is off or on.  It happens
+    // with both "Mark" and "Select All".  Calling setBufferSize with the
+    // existing buffer size does not hang, but calling it with only a changed
+    // buffer height *does* hang.  Calling setWindowPos does not hang.
+    setBufferSize(120, 25);
+
+    printf("Done...\n");
+    Sleep(2000);
+}