182 Commits

Author	SHA1	Message	Date
EDiasAlberto	c74a8c55aa	Implement stack growth for system calls and add stack pointer tracking to thread	2024-11-27 19:21:43 +00:00
Themis Demetriades	1e6b90da0d	Implement skeleton for swapping frames into disk	2024-11-26 18:59:46 +00:00
Themis Demetriades	ea2725f606	feat: implement frame table without thread safety	2024-11-26 15:17:11 +00:00
EDiasAlberto	3ef5264b6e	feat: allow stack to grow for process up to 8MB in size	2024-11-26 04:43:25 +00:00
Gleb Koval	aedb72246b	fix: do not acquire filesys_lock for tell and seek	2024-11-24 15:41:18 +00:00
Gleb Koval	8567434231	Use a single exit_status instead of two	2024-11-15 17:28:04 +00:00
Gleb Koval	2566948a32	Implement hash table for child process results	2024-11-15 16:45:04 +00:00
sBubshait	ea3b3594ea	Update fd_hash to use the fd itself as the hash value for performance, w/ G & E	2024-11-15 15:53:01 +00:00
sBubshait	6b1dbdd34f	Update thread and syscall to use local fd counter instead global one, preventing overflow	2024-11-15 15:48:56 +00:00
sBubshait	7daf4fb079	Refactor process_exit to add more comments for readability	2024-11-15 15:35:07 +00:00
sBubshait	a7f1d519da	Refactor process_wait to add more comments and improve readability	2024-11-15 15:09:24 +00:00
sBubshait	0f1bce2e88	Refactor process_init_stack to add asserts and comments	2024-11-15 14:52:21 +00:00
sBubshait	f4c900e56c	Refactor process.c for comments, clarity and readability	2024-11-15 14:37:38 +00:00
sBubshait	82d45880f7	Update validate_user_pointer to start from the beginning of the page rather than the given ptr	2024-11-15 13:51:10 +00:00
sBubshait	1c757ecdfe	Update syscall to add more helpful comments for clarity and readability	2024-11-15 13:51:10 +00:00
Themis Demetriades	eff0837fdc	Update stack initialization code to handle all possible overflows and implement a user program to test this	2024-11-15 13:35:58 +00:00
Themis Demetriades	5e2e7199f2	Fix memory leak in start_process	2024-11-14 21:03:55 +00:00
Themis Demetriades	e4036c715f	Refactor start_process to hold file system lock for less time	2024-11-14 16:05:15 +00:00
Themis Demetriades	3a46e0f73a	Update user proc stack initialization comments to be more helpful	2024-11-14 15:54:34 +00:00
Themis Demetriades	8821851459	Refactor process_execute to remove use of 'goto'	2024-11-14 14:42:26 +00:00
Themis Demetriades	1a2ff35231	Refactor process_execute to pass process start data as a local reference rather than perform memory allocation on the heap	2024-11-14 14:32:48 +00:00
Gleb Koval	f5e498e0a9	explicit thread_exit () when process_start () fails	2024-11-13 21:58:41 +00:00
Gleb Koval	d02b956221	Merge branch 'system-calls' into 'userprog-oom' ... Add Fixes to Memory Leaks, Memory Access Validation, Synchronised Processes and Refactoring See merge request lab2425_autumn/pintos_22!38	2024-11-13 19:20:19 +00:00
sBubshait	fa2fb4a711	Refactor system call comments for accuracy and grammar	2024-11-13 18:48:23 +00:00
sBubshait	31ea215805	Refactor validate_user_string to remove unnecessary variable to track length of str	2024-11-13 18:30:24 +00:00
Gleb Koval	e7cb16b301	Fix child_results loop accessing next after free()	2024-11-13 18:29:05 +00:00
sBubshait	9549ca28e5	Refactor syscall: Use EXIT_FAILURE instead of magic numbers & close files on failure	2024-11-13 18:18:41 +00:00
sBubshait	b1c5819469	Avoid masking the struct syscall_arguments using typedef for consistency	2024-11-13 18:06:51 +00:00
sBubshait	287130ca7b	Update syscall.c to use syscall_exit on failure instead of calling thread_exit directly	2024-11-13 18:02:08 +00:00
sBubshait	4f586bb4da	Fix Bug: Free all entries in the fd hashtable when the process exits, w/ E	2024-11-13 17:42:25 +00:00
sBubshait	d890c2353e	Add constant MAX_SYSCALL_ARGS to avoid magic numbers [Gleb]	2024-11-13 17:16:15 +00:00
sBubshait	eb4f23c290	Add validate_user_string helper function to validate that a string is fully conatined within user vm	2024-11-13 17:11:37 +00:00
sBubshait	26de38cdba	Update validate_user_pointer to check if the memory block is mapped into a physical address	2024-11-13 16:39:45 +00:00
sBubshait	6e59e8c9f3	Update validate_user_pointer to be a void function	2024-11-13 16:22:16 +00:00
Gleb Koval	005791edd2	Synchronise process_execute return with child process load	2024-11-13 11:05:09 +00:00
Gleb Koval	dd979f34c8	Fix syn-read, syn-write, and always free elements from donors_list	2024-11-12 21:30:23 +00:00
Gleb Koval	ca9d23edf9	Always release filesys_lock when checking if file is valid in process_execute	2024-11-12 20:07:51 +00:00
Themis Demetriades	d878dbc132	Fix bug in userprog-merge where file writes were denied in the wrong thread	2024-11-12 16:22:32 +00:00
Themis Demetriades	b0400693ae	Update process_execute to acquire lock when checking if file exists	2024-11-12 16:12:24 +00:00
Themis Demetriades	3418425f20	Don't acquire filesys lock when calling exec	2024-11-12 16:08:27 +00:00
Gleb Koval	59e7a64f8e	Only check user pages rather than all bytes in-between, for known-size pointers	2024-11-12 15:48:22 +00:00
Gleb Koval	cf4bf90cbb	Implement user pointer checking for C strings	2024-11-12 15:34:45 +00:00
Gleb Koval	9a6abab95e	Check access to user memory using page fault method (via get_user and put_user).	2024-11-12 15:00:16 +00:00
Gleb Koval	44f6a85163	Add get_user and put_user provided by spec.	2024-11-12 14:50:53 +00:00
Gleb Koval	83e044cf68	Let kernel handle its own page faults	2024-11-12 14:50:53 +00:00
Themis Demetriades	a69b9c808e	Update start_process to acquire filesys lock when loading user process file	2024-11-12 14:21:33 +00:00
EDiasAlberto	72afecfbda	Add validation to check for missing files in exec() args	2024-11-11 23:10:02 +00:00
Themis Demetriades	e8713e26c6	Update variable references between conflicting merges to refer to the same data in stack initialization	2024-11-11 22:51:19 +00:00
Demetriades, Themis	47c3657b65	Merge branch 'process-wait' into 'userprog-merge' ... Fix race-condition in process result (memory leak), fix infinite loop in donors_list See merge request lab2425_autumn/pintos_22!33	2024-11-11 22:24:39 +00:00
Demetriades, Themis	4eafdf10ba	Merge branch 'read-only-exec' into 'userprog-merge' ... Combine syscall code with final stack initialization code See merge request lab2425_autumn/pintos_22!32	2024-11-11 22:23:20 +00:00