1 files changed, 86 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/filemapping_memmgt/LockFile/test1/helper.cpp b/src/pal/tests/palsuite/filemapping_memmgt/LockFile/test1/helper.cpp
new file mode 100644
index 0000000000..05b4b8451a
--- /dev/null
+++ b/src/pal/tests/palsuite/filemapping_memmgt/LockFile/test1/helper.cpp
@@ -0,0 +1,86 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*=============================================================
+**
+** Source: helper.c
+**
+** Purpose: A child process which will attempt to read and write to files
+** which were locked in the parent.
+**
+**
+**============================================================*/
+
+#include <palsuite.h>
+
+#define BUF_SIZE 128
+
+int __cdecl main(int argc, char *argv[])
+{
+    HANDLE TheFile;
+    int result = 0;
+    char DataBuffer[BUF_SIZE];
+    DWORD BytesRead, BytesWritten;
+    char fileName[] = "testfile.tmp";
+    
+    if(0 != (PAL_Initialize(argc, argv)))
+    {
+        return FAIL;
+    }
+    
+    /* Open the same file that the parent has opened and locked */
+    TheFile = CreateFile(fileName,     
+                         GENERIC_READ|GENERIC_WRITE, 
+                         FILE_SHARE_READ|FILE_SHARE_WRITE,
+                         NULL,     
+                         OPEN_EXISTING,                 
+                         FILE_ATTRIBUTE_NORMAL, 
+                         NULL);
+    
+    if (TheFile == INVALID_HANDLE_VALUE) 
+    { 
+        Fail("ERROR: Could not open file '%s' with CreateFile.",fileName); 
+    }
+
+    /* Attempt to Read 5 bytes from this file.  Since it is locked, this
+       should fail.
+    */
+    
+    if(ReadFile(TheFile, DataBuffer, 5, &BytesRead, NULL) != 0)
+    {
+        Trace("ERROR: ReadFile should have failed!  It was called on "
+              "a locked file. But, it returned non-zero indicating success.");
+        result = 1;
+    }
+
+    /* Attempt to Write 5 bytes to this file.  Since it is locked this should
+       fail.
+    */
+
+    memset(DataBuffer,'X',BUF_SIZE);
+
+    if(WriteFile(TheFile, DataBuffer, 5,&BytesWritten, NULL) != 0)
+    {
+        Trace("ERROR: WriteFile should have failed!  It was called on "
+              "a locked file. But, it returned non-zero indicating success.");
+        result = 1;
+    } 
+   
+    /* Check to ensure that the number of Bytes read/written is still 0, 
+       since nothing should have been read or written.
+    */
+    
+    if(BytesRead != 0 || BytesWritten !=0)
+    {
+        Trace("ERROR: The number of bytes read is %d and written is %d.  "
+              "These should both be 0, as the file was locked.",
+              BytesRead,BytesWritten);
+        result = 1;
+    }
+
+    PAL_TerminateEx(result);
+    return result;
+}
+
+