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/*
* 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);
}
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