258 Commits

Author	SHA1	Message	Date
sBubshait	806d6bc19e	Refactor: Move destroying mmap data into process_exit instead of thread	2024-12-04 21:59:38 +00:00
sBubshait	ecbb4e74a5	Implement the unmap system call, writing back to the file if a page is dirty before removing from SPT	2024-12-04 19:07:28 +00:00
sBubshait	02b79d1934	Update mmap to add temporarily page_set_swap until swap is implemented	2024-12-04 18:13:07 +00:00
sBubshait	857cae3578	Update mmap to add a get helper function to find a mmap entry from its mapping	2024-12-04 18:08:05 +00:00
sBubshait	941e1e067a	Update SPT page entry to change type from EXECUTABLE to PAGE_FILE to capture mmaps in addition to executables	2024-12-04 17:51:30 +00:00
sBubshait	ad6e4b4059	Implement syscall_mmap to validate and then map all file data into a user address in memory	2024-12-04 17:42:53 +00:00
sBubshait	72fa0c1bbb	Fix Bug: Initialise the mmap table for the newly created thread rather than the current thread	2024-12-04 17:41:14 +00:00
sBubshait	67f16cb2a6	Update syscall.c to allow mmap and unmap system calls through helper handler functions for each	2024-12-04 15:31:53 +00:00
sBubshait	6b0f708d8f	Update mmap to add an insert helper function to allocate and add new mmap entries to the hash table	2024-12-04 15:26:00 +00:00
sBubshait	6e838aa06a	Fix Bug in thread.c: Only initialise and destroy mmap files table if VM is defined	2024-12-04 15:24:11 +00:00
sBubshait	a2f46f3b72	Add a mmap destroy function to cleanup all mmap hash table entries upon thread exit	2024-12-04 15:14:02 +00:00
sBubshait	1ce09a49a1	Add helper functions to initialise the memory-mapped files table and counter	2024-12-04 15:08:43 +00:00
sBubshait	b3042b5aa6	Update thread structure to add mmap files table and a counter for mappings of the thread	2024-12-04 14:56:52 +00:00
sBubshait	acc768e177	Add mmap module in vm defining mmap_entry structure and some helper functions	2024-12-04 13:01:01 +00:00
sBubshait	8047c65227	Update syscall handling of invalid pointers by preloading pages using the helper try_fetch_page	2024-11-29 18:55:28 +00:00
sBubshait	d047a3c242	Update Userprog Makefile to include vm files	2024-11-29 18:49:26 +00:00
sBubshait	c8b93c57ee	Fix: Update writability of the last page after loading as a workaround to calculating the offset, w/ G	2024-11-29 15:45:44 +00:00
sBubshait	92d0b68243	Fix: Avoid closing the file after loading segments to be able to lazily load from file without opening, w/ G	2024-11-29 14:32:55 +00:00
sBubshait	801fd7d310	Implement page fault for lazy loading executables, w/ G	2024-11-28 20:03:50 +00:00
sBubshait	df20e0fdfe	Update load_segment to load only the metadata of the pages to the SPT, w/ G	2024-11-28 18:35:49 +00:00
sBubshait	97e6e0fb1e	Add SPT Helper Functions: Insert, Get, Cleanup w/ G	2024-11-28 18:18:52 +00:00
sBubshait	14fc96febf	Implement Supplemental Page Table (SPT) per thread along with structure for its entries, w/ G	2024-11-28 17:54:15 +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
Gleb Koval	aedb72246b	fix: do not acquire filesys_lock for tell and seek	2024-11-24 15:41:18 +00:00
Gleb Koval	e1f0258f8e	fix: handle malloc result in init_process_result	2024-11-24 15:09:32 +00:00
Gleb Koval	8567434231	Use a single exit_status instead of two	2024-11-15 17:28:04 +00:00
sBubshait	8f82f9d747	Fix Bug in fd_counter initialisation when USERPROG is not defined	2024-11-15 16:57:16 +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
sBubshait	6a1d10a19b	Refactor synch to follow PintOS curly braces indentation style in if statements	2024-11-15 13:51:10 +00:00
Themis Demetriades	7947ac78e8	Remove args-ovf user program binary, replacing with source for testing	2024-11-15 13:40:21 +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