void RunOSTests() {
// STUDENT: run any os-level tests here
int handle = 0;
char *file1 = "test1";
char mem[20000];
char mem_read[20000];
int start_byte = 0;
int num_bytes = 0;
int ct = 0;
char stuff = 'a';
int ct_err = 0;
// first, initialize the file system
if(DfsOpenFileSystem() == DFS_FAIL)
{
dbprintf('s', "ostests: failed to open file system.\n");
}
//make sure such file does not exist, if yes, error
if(DfsInodeFilenameExists(file1) != DFS_FAIL)
{
dbprintf('s', "Error: found unexisted file.\n");
}
// now create an inode for such file
handle = DfsInodeOpen(file1);
// now check if such file exists
printf("hello.\n");
if(DfsInodeFilenameExists(file1) != handle)
{
dbprintf('s', "Error: file inode did not create.\n");
}
// start to write bytes into memory
// first write something into the mem
for(ct = 0; ct < 512; ct++)
{
mem[ct] = stuff;
stuff = 'z' ? 'a' : (stuff + 1);
}
// now that mem is stuffed, we write part of it into file
num_bytes = 350; // write 350 bytes
start_byte = 0; // start from 25th byte
//////////////////////// ERROR HERE ///////////////////////
if(DfsInodeWriteBytes(handle, mem, start_byte, num_bytes) != num_bytes)
{
dbprintf('s', "dfs write: write 350 bytes failed.\n");
}
// now check if previous 25 bytes are empty and all stuff are written, read from 0, to 512
if(DfsInodeReadBytes(handle, mem_read, 0, 512) != num_bytes)
{
dbprintf('s', "dfs read: read 350 bytes failed.\n");
}
// now test if the read data is identicle to the written
// first test if first 25 are 0
for(ct = 0; ct < 25; ct++)
{
if(mem_read[ct] != 0)
{
ct_err++;
}
}
/* dbprintf('s', "Among the first 25 data, %d are not correct.\n", ct_err); */
printf("Among the first 25 data, %d are not correct.\n", ct_err);
// then test if next 350 bytes are what were written
ct_err = 0;
for(; ct < 375; ct++)
{
if(mem_read[ct] != mem[ct-25])
{
ct_err++;
}
}
/* dbprintf('s', "Among the next 350 bytes, %d are not correct.\n", ct_err); */
printf("Among the next 350 bytes, %d are not correct.\n", ct_err);
// last check if the remaining 138 bytes are null
ct_err = 0;
for(; ct < 512; ct++)
{
if(mem_read[ct] != 0)
{
ct_err++;
}
}
/* dbprintf('s', "Among the last 138 bytes, %d are not correct.\n", ct_err); */
printf("Among the last 138 bytes, %d are not correct.\n", ct_err);
// next test if we can over write into the file
// change the mem
stuff = '1';
for(ct = 0; ct < 1024; ct++)
{
mem[ct] = stuff;
stuff = '9' ? '1' : (stuff + 1);
}
// now write this into the previous
if(DfsInodeWriteBytes(handle, (void *)mem, 0, 1024) != num_bytes)
{
dbprintf('s', "dfs write: write 1024 bytes failed.\n");
}
// now check if previous 25 bytes are empty and all stuff are written, read from 0, to 512
if(DfsInodeReadBytes(handle, mem_read, 0, 1024) != num_bytes)
{
dbprintf('s', "dfs read: read 1024 bytes failed.\n");
}
ct_err = 0;
for(ct = 0; ct < 1024; ct++)
{
if(mem_read[ct] != mem[ct])
{
ct_err++;
}
}
/* dbprintf('s', "Among the first dfs block, %d are not correct.\n", ct_err); */
printf("Among the first dfs block, %d are not correct.\n", ct_err);
// we need to check if those data still there after closing file system
// now we test how it works when write more than one block
stuff = 'a';
for(ct = 0; ct < 1025; ct++)
{
mem[ct] = stuff;
stuff = 'z' ? 'a' : (stuff + 1);
}
// now write this into the previous
if(DfsInodeWriteBytes(handle, (void *)mem, 1024, 1025) != num_bytes)
{
dbprintf('s', "dfs write: write 1024 bytes failed.\n");
}
// now check if previous 25 bytes are empty and all stuff are written, read from 0, to 512
if(DfsInodeReadBytes(handle, mem_read, 1024, 1025) != num_bytes)
{
dbprintf('s', "dfs read: read 1024 bytes failed.\n");
}
ct_err = 0;
for(ct = 0; ct < 1025; ct++)
{
if(mem_read[ct] != mem[ct])
{
ct_err++;
}
}
/* dbprintf('s', "Among the second dfs block, %d are not correct.\n", ct_err); */
printf("Among the second dfs block, %d are not correct.\n", ct_err);
// check if in the third block, all are null except the first byte
if(DfsInodeReadBytes(handle, mem_read, 2048, 1024) != 1024)
{
dbprintf('s', "dfs read: third 1024 bytes failed.\n");
}
if(mem_read[0] == 0)
{
dbprintf('s', "Error: previous write was not right.\n");
}
for(ct = 1; ct < 1024; ct++)
{
if(mem_read[ct] != 0)
{
dbprintf('s', "Error: a byte is not written while it is not supposed to.\n");
break;
}
}
// now we write into enough bytes to create indirect table
stuff = 'A';
for(ct = 0; ct < 13313; ct++)
{
mem[ct] = stuff;
stuff = 'Z' ? 'A' : (stuff + 1);
}
// write till 5th indirect block, and one more extra byte in 6th
if(DfsInodeWriteBytes(handle, (void *)mem, 2048, 13313) != 13313)
{
dbprintf('s', "dfs write: write 13313 bytes failed.\n");
}
// we should check this by using block print
// close inode
if(DfsInodeDelete(handle) != DFS_SUCCESS)
{
dbprintf('s', "Error: inode delete fail.\n");
}
// close the file system
if(DfsCloseFileSystem() != DFS_SUCCESS)
{
dbprintf('s', "Error: file system close fail.\n");
}
printf("======================== ostests completed ===============================.\n");
}
//----------------------------------------------------------------------
//
// main
//
// This routine is called when the OS starts up. It allocates a
// PCB for the first process - the one corresponding to the initial
// thread of execution. Note that the stack pointer is already
// set correctly by _osinit (assembly language code) to point
// to the stack for the 0th process. This stack isn't very big,
// though, so it should be replaced by the system stack of the
// currently running process.
//
//----------------------------------------------------------------------
void main (int argc, char *argv[])
{
int i,j;
int n;
char buf[120];
char *userprog = (char *)0;
int base=0;
int numargs=0;
int allargs_offset = 0;
char allargs[SIZE_ARG_BUFF];
debugstr[0] = '\0';
printf ("Got %d arguments.\n", argc);
printf ("Available memory: 0x%x -> 0x%x.\n", (int)lastosaddress, MemoryGetSize ());
printf ("Argument count is %d.\n", argc);
for (i = 0; i < argc; i++) {
printf ("Argument %d is %s.\n", i, argv[i]);
}
FsModuleInit ();
for (i = 0; i < argc; i++)
{
if (argv[i][0] == '-')
{
switch (argv[i][1])
{
case 'D':
dstrcpy (debugstr, argv[++i]);
break;
case 'i':
n = dstrtol (argv[++i], (void *)0, 0);
ditoa (n, buf);
printf ("Converted %s to %d=%s\n", argv[i], n, buf);
break;
case 'f':
{
int start, codeS, codeL, dataS, dataL, fd, j;
int addr = 0;
static unsigned char buf[200];
fd = ProcessGetCodeInfo (argv[++i], &start, &codeS, &codeL, &dataS,
&dataL);
printf ("File %s -> start=0x%08x\n", argv[i], start);
printf ("File %s -> code @ 0x%08x (size=0x%08x)\n", argv[i], codeS,
codeL);
printf ("File %s -> data @ 0x%08x (size=0x%08x)\n", argv[i], dataS,
dataL);
while ((n = ProcessGetFromFile (fd, buf, &addr, sizeof (buf))) > 0)
{
for (j = 0; j < n; j += 4)
{
printf ("%08x: %02x%02x%02x%02x\n", addr + j - n, buf[j], buf[j+1],
buf[j+2], buf[j+3]);
}
}
close (fd);
break;
}
case 'u':
userprog = argv[++i];
base = i; // Save the location of the user program's name
break;
default:
printf ("Option %s not recognized.\n", argv[i]);
break;
}
if(userprog)
break;
}
}
dbprintf ('i', "About to initialize queues.\n");
AQueueModuleInit ();
dbprintf ('i', "After initializing queues.\n");
MemoryModuleInit ();
dbprintf ('i', "After initializing memory.\n");
ProcessModuleInit ();
dbprintf ('i', "After initializing processes.\n");
SynchModuleInit ();
dbprintf ('i', "After initializing synchronization tools.\n");
KbdModuleInit ();
dbprintf ('i', "After initializing keyboard.\n");
ClkModuleInit();
for (i = 0; i < 100; i++) {
buf[i] = 'a';
}
i = FsOpen ("vm", FS_MODE_WRITE);
dbprintf ('i', "VM Descriptor is %d\n", i);
FsSeek (i, 0, FS_SEEK_SET);
FsWrite (i, buf, 80);
FsClose (i);
// JSM -- commented out for initial build, MUST ADD BACK IN!!
DfsModuleInit();
dbprintf ('i', "After initializing dfs filesystem.\n");
////////////////////////////////////////
// JSM -- add debug stuff, and close file system before fdisk app has run
// FOR TESTING PURPOSES!!
i = DfsAllocateBlock();
j = DfsAllocateBlock();
DfsFreeBlock(i);
DfsFreeBlock(j);
dbprintf('F', "ProcessFork: closing filesystem and exiting simulator\n");
DfsCloseFileSystem();
exitsim();
////////////////////////////////////////
// Setup command line arguments
if (userprog != (char *)0) {
numargs=0;
allargs_offset = 0;
// Move through each of the argv addresses
for(i=0; i<argc-base; i++) {
// At each argv address, copy the string into allargs, including the '\0'
for(j=0; allargs_offset < SIZE_ARG_BUFF; j++) {
allargs[allargs_offset++] = argv[i+base][j];
if (argv[i+base][j] == '\0') break; // end of this string
}
numargs++;
}
allargs[SIZE_ARG_BUFF-1] = '\0'; // set last char to NULL for safety
ProcessFork(0, (uint32)allargs, userprog, 1);
} else {
dbprintf('i', "No user program passed!\n");
}
// Start the clock which will in turn trigger periodic ProcessSchedule's
ClkStart();
intrreturn ();
// Should never be called because the scheduler exits when there
// are no runnable processes left.
GracefulExit(); // NEVER RETURNS!
}
void GracefulExit() {
dbprintf('F', "GracefulExit: closing filesystem and exiting simulator\n");
DfsCloseFileSystem();
DfsCacheFlush();
exitsim();
}