Merge pull request #90 from Lind-Project/feat-exec-exit-implementation

Feat exec exit implementation

src/safeposix/cage.rs

@@ -36,7 +36,7 @@ pub struct Cage {
     pub pendingsigset: interface::RustHashMap<u64, interface::RustAtomicU64>,
     pub main_threadid: interface::RustAtomicU64,
     pub interval_timer: interface::IntervalTimer,
-    pub vmmap:  Vmmap,
+    pub vmmap: interface::RustLock<Vmmap>,
 }
 
 impl Cage {

src/safeposix/dispatcher.rs

@@ -1097,6 +1097,7 @@ pub fn lindrustinit(verbosity: isize) {
         pendingsigset: interface::RustHashMap::new(),
         main_threadid: interface::RustAtomicU64::new(0),
         interval_timer: interface::IntervalTimer::new(0),
+        vmmap: interface::RustLock::new(Vmmap::new()) // Initialize empty virtual memory map for new process
     };
 
     interface::cagetable_insert(0, utilcage);
@@ -1136,6 +1137,7 @@ pub fn lindrustinit(verbosity: isize) {
         pendingsigset: interface::RustHashMap::new(),
         main_threadid: interface::RustAtomicU64::new(0),
         interval_timer: interface::IntervalTimer::new(1),
+        vmmap: interface::RustLock::new(Vmmap::new()) // Initialize empty virtual memory map for new process
     };
     interface::cagetable_insert(1, initcage);
     fdtables::init_empty_cage(1);

src/safeposix/syscalls/fs_calls.rs

@@ -27,7 +27,14 @@ use std::ptr;
 use std::mem;
 
 use crate::fdtables;
-
+use crate::safeposix::cage::Cage;
+use libc::{
+    PROT_READ, PROT_WRITE,  // Memory protection flags
+    O_RDONLY, O_WRONLY, O_RDWR, O_CREAT, O_TRUNC,  // File open flags
+    MAP_SHARED, MAP_PRIVATE,  // Memory mapping flags
+    SEEK_SET, SEEK_CUR, SEEK_END,  // Seek constants
+    S_IRWXU, S_IRWXG, S_IRWXO,  // Permission flags (user, group, others)
+};
 static LIND_ROOT: &str = "/home/lind/lind_project/src/safeposix-rust/tmp";
 
 const FDKIND_KERNEL: u32 = 0;

src/safeposix/syscalls/sys_calls.rs

@@ -169,6 +169,7 @@ impl Cage {
             pendingsigset: interface::RustHashMap::new(),
             main_threadid: interface::RustAtomicU64::new(0),
             interval_timer: interface::IntervalTimer::new(child_cageid),
+            vmmap: interface::RustLock::new(Vmmap::new()) // Initialize empty virtual memory map for new process
         };
 
         let shmtable = &SHM_METADATA.shmtable;
@@ -241,6 +242,7 @@ impl Cage {
             pendingsigset: interface::RustHashMap::new(),
             main_threadid: interface::RustAtomicU64::new(0),
             interval_timer: self.interval_timer.clone_with_new_cageid(child_cageid),
+            vmmap: interface::RustLock::new(Vmmap::new())  // Fresh clean vmmap
         };
         //wasteful clone of fdtable, but mutability constraints exist