X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/48b4a227035048fdebcd32532deb7a857c6199ac..86a9cfeadbbe180abf6c8bd8c64c86957fdacfeb:/lunaix-os/kernel/lxinit.c?ds=sidebyside

diff --git a/lunaix-os/kernel/lxinit.c b/lunaix-os/kernel/lxinit.c
index 7decff4..e6ca67b 100644
--- a/lunaix-os/kernel/lxinit.c
+++ b/lunaix-os/kernel/lxinit.c
@@ -14,71 +14,67 @@ extern uint8_t __kernel_start;
 
 LOG_MODULE("INIT")
 
-void 
-test_timer(void* payload);
+// #define FORK_BOMB_DEMO
+#define WAIT_DEMO
 
 void
 _lxinit_main()
 {
+#ifdef FORK_BOMB_DEMO
+    // fork炸弹
+    for (;;) {
+        pid_t p;
+        if ((p = fork())) {
+            kprintf(KDEBUG "Forked %d\n", p);
+        }
+    }
+#endif
+
+#ifdef WAIT_DEMO
+    // 测试wait
+    kprintf("I am parent, going to fork my child and wait.\n");
+    if (!fork()) {
+        kprintf("I am child, going to sleep for 2 seconds\n");
+        sleep(2);
+        kprintf("I am child, I am about to terminated\n");
+        _exit(1);
+    }
+    int status;
+    pid_t child = wait(&status);
+    kprintf("I am parent, my child (%d) terminated with code: %d.\n", child, status);
+#endif
+    
     // 这里是就是LunaixOS的第一个进程了！
     for (size_t i = 0; i < 10; i++)
     {
         pid_t pid = 0;
         if (!(pid = fork())) {
-            while (1)
-            {
-                // kprintf(KINFO "Process %d\n", i);
-                tty_put_char('0'+i);
-                yield();
+            sleep(i);
+            if (i == 3) {
+                i = *(int*)0xdeadc0de;    // seg fault!
             }
+            tty_put_char('0'+i);
+            tty_put_char('\n');
+            _exit(0);
         }
         kprintf(KINFO "Forked %d\n", pid);
     }
 
-    // FIXME: 这里fork会造成下面lxmalloc产生Heap corruption，需要实现COW和加入mutex
-    // fork();
-      
-
     char buf[64];
 
-    kprintf(KINFO "Hello higher half kernel world!\nWe are now running in virtual "
-           "address space!\n\n");
+    kprintf(KINFO "Hello processes!\n");
 
     cpu_get_brand(buf);
     kprintf("CPU: %s\n\n", buf);
 
-    void* k_start = vmm_v2p(&__kernel_start);
-    kprintf(KINFO "The kernel's base address mapping: %p->%p\n", &__kernel_start, k_start);
-
-    // test malloc & free
-
-    uint8_t** arr = (uint8_t**)lxmalloc(10 * sizeof(uint8_t*));
-
-    for (size_t i = 0; i < 10; i++) {
-        arr[i] = (uint8_t*)lxmalloc((i + 1) * 2);
-    }
-
-    for (size_t i = 0; i < 10; i++) {
-        lxfree(arr[i]);
-    }
-
-    uint8_t* big_ = lxmalloc(8192);
-    big_[0] = 123;
-    big_[1] = 23;
-    big_[2] = 3;
-
-    kprintf(KINFO "%u, %u, %u\n", big_[0], big_[1], big_[2]);
-
-    // good free
-    lxfree(arr);
-    lxfree(big_);
-
-    // timer_run_second(1, test_timer, NULL, TIMER_MODE_PERIODIC);
+    // no lxmalloc here! This can only be used within kernel, but here, we are in a dedicated process!
+    // any access to kernel method must be done via syscall
 
     struct kdb_keyinfo_pkt keyevent;
     while (1)
     {
         if (!kbd_recv_key(&keyevent)) {
+            // yield();
             continue;
         }
         if ((keyevent.state & KBD_KEY_FPRESSED) && (keyevent.keycode & 0xff00) <= KEYPAD) {
@@ -89,18 +85,4 @@ _lxinit_main()
     
 
     spin();
-}
-
-static datetime_t datetime;
-
-void test_timer(void* payload) {
-    clock_walltime(&datetime);
-
-    kprintf(KWARN "%u/%02u/%02u %02u:%02u:%02u\r",
-           datetime.year,
-           datetime.month,
-           datetime.day,
-           datetime.hour,
-           datetime.minute,
-           datetime.second);
 }
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