From: Ben Pfaff <blp@cs.stanford.edu>
Date: Thu, 2 Sep 2004 23:28:07 +0000 (+0000)
Subject: Destroy PT pages in addrspace_destroy().
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dc83e159fc3dd0301a967aef2b84f1460aa3ef08;p=pintos-anon

Destroy PT pages in addrspace_destroy().
---

diff --git a/src/threads/paging.c b/src/threads/paging.c
index 2ae78c3..a86969b 100644
--- a/src/threads/paging.c
+++ b/src/threads/paging.c
@@ -85,10 +85,26 @@ void
 pagedir_destroy (uint32_t *pd) 
 {
   void *kpage, *upage;
+  unsigned pde_idx;
 
+  /* Destroy user pages. */
   for (kpage = pagedir_first (pd, &upage); kpage != NULL;
        kpage = pagedir_next (pd, &upage)) 
     palloc_free (kpage);
+
+  /* Destroy page table pages. */
+  for (pde_idx = 0; pde_idx < pd_no (PHYS_BASE); pde_idx++) 
+    {
+      uint32_t pde = pd[pde_idx];
+
+      if (pde != 0) 
+        {
+          uint32_t *pt = pde_get_pt (pde);
+          palloc_free (pt);
+        }
+    }
+
+  /* Destroy page directory. */
   palloc_free (pd);
 }