debugging prints

ab17e319 · rsc · 15421863 · ab17e319 · ab17e319 · ab17e319
--- a/console.c
+++ b/console.c
@@ -356,12 +356,20 @@ kbd_intr()
      c += 'a' - 'A';
  }
+  switch(c){
+  case 0:
    // Ignore unknown keystrokes.
-  if(c == 0x0) {
+    break;
-    release(&kbd_lock);
-    return;
-  }
+  case C('T'):
+    cprintf("#");  // Let user know we're still alive.
+    break;
+  case C('P'):
+    procdump();
+    break;
+  default:
    if(((kbd_w + 1) % KBD_BUF) != kbd_r){
      kbd_buf[kbd_w++] = c;
      if(kbd_w >= KBD_BUF)
@@ -370,6 +378,8 @@ kbd_intr()
    } else {
      cprintf("kbd overflow\n");
    }
+    break;
+  }
  release(&kbd_lock);
 }

--- a/defs.h
+++ b/defs.h
@@ -24,6 +24,7 @@ void proc_exit(void);
 int proc_kill(int);
 int proc_wait(void);
 void yield(void);
+void procdump(void);
 // swtch.S
 struct jmpbuf;

--- a/proc.c
+++ b/proc.c
@@ -403,3 +403,19 @@ proc_wait(void)
  }
 }
+// Print a process listing to console.  For debugging.
+// Runs when user types ^P on console.
+// No lock to avoid wedging a stuck machine further.
+void
+procdump(void)
+{
+  int i;
+  struct proc *p;
+  for(i = 0; i < NPROC; i++) {
+    p = &proc[i];
+    if(p->state == UNUSED)
+      continue;
+    cprintf("%d %d %p\n", p->pid, p->state);
+  }
+}