diff options
Diffstat (limited to 'src/pal/tests/palsuite/filemapping_memmgt/LockFile/test5/helper.c')
-rw-r--r-- | src/pal/tests/palsuite/filemapping_memmgt/LockFile/test5/helper.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/filemapping_memmgt/LockFile/test5/helper.c b/src/pal/tests/palsuite/filemapping_memmgt/LockFile/test5/helper.c new file mode 100644 index 0000000000..1fc9b1a9a5 --- /dev/null +++ b/src/pal/tests/palsuite/filemapping_memmgt/LockFile/test5/helper.c @@ -0,0 +1,122 @@ +// 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. It will also lock another region of the +** same file. +** +** +**============================================================*/ + +#include <palsuite.h> +#include "../LockFile.h" + +#define FILENAME "testfile.txt" +#define WAITFILENAME "waitfile" +#define BUF_SIZE 128 + +int __cdecl main(int argc, char *argv[]) +{ + HANDLE TheFile, WaitFile; + int result = 0; + char DataBuffer[BUF_SIZE]; + DWORD BytesRead; + + 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) + { + Trace("ERROR: Could not open file '%s' with CreateFile.",FILENAME); + result = 1; + } + + /* Open up the WaitFile that we're using for IPC */ + WaitFile = CreateFile(WAITFILENAME, + GENERIC_READ|GENERIC_WRITE, + FILE_SHARE_READ|FILE_SHARE_WRITE, + NULL, + OPEN_ALWAYS, + FILE_ATTRIBUTE_NORMAL, + NULL); + + if (WaitFile == INVALID_HANDLE_VALUE) + { + Trace("ERROR: Could not open file '%s' with CreateFile. " + "GetLastError() returned %d.",WAITFILENAME,GetLastError()); + result = 1; + } + + /* Lock the same file that the parent process locked, but the child + locks bytes 11 through 20 + */ + + if(LockFile(TheFile, 11, 0, 10, 0) == 0) + { + Trace("ERROR: LockFile failed in the child proccess. " + "GetLastError returns %d.", + GetLastError()); + result = 1; + } + + /* Check to ensure the parent lock is respected */ + if(ReadFile(TheFile, DataBuffer, 10, &BytesRead, NULL) != 0) + { + Trace("ERROR: ReadFile returned success when it should " + "have failed. Attempted to read the first 10 bytes " + "of a file which was locked by the parent process."); + result = 1; + } + + /* Check to ensure the lock put on by this proccess doesn't restrict + access + */ + + if(SetFilePointer(TheFile, 11, 0, FILE_BEGIN) == INVALID_SET_FILE_POINTER) + { + Trace("ERROR: SetFilePointer was unable to move the file pointer to " + "the 11th byte in the file, within the child proccess. " + "GetLastError() returned %d.",GetLastError()); + result = 1; + } + + if(ReadFile(TheFile, DataBuffer, 10, &BytesRead, NULL) == 0) + { + Trace("ERROR: ReadFile failed when attempting to read a section of " + "the file which was locked by the current process. It should " + "have been able to read this. GetLastError() returned %d.", + GetLastError()); + result = 1; + } + + // Sleep for a bit to give the parent a chance to block before we do. + Sleep(1000); + + /* Switch back to the parent, so it can check the child's locks */ + SignalAndBusyWait(WaitFile); + + if(UnlockFile(TheFile, 11, 0, 10, 0) == 0) + { + Fail("ERROR: Failed to Unlock bytes 11-20 in the file. " + "GetLastError returned %d.",GetLastError()); + } + + PAL_TerminateEx(result); + return result; +} |