oops, forgetting to set succ for new range!

6150f2f6 · Nickolai Zeldovich · 45c455ee · 6150f2f6 · 6150f2f6
--- a/crange.cc
+++ b/crange.cc
@@ -515,6 +515,9 @@ crange_locked::replace(range *repl)
    newlast = e;
  }

+  if (newlast)
+    newlast->next[0] = succ_;
+
  // do compare-exchange first, and only then mark the old ranges as deleted;
  // otherwise, concurrent readers may not find either old or new ranges.
  assert(prev_->next[0].cmpxch(first_?:succ_, repl?:succ_));

--- a/vm.cc
+++ b/vm.cc
@@ -277,17 +277,17 @@ vmap::insert(vmnode *n, uptr vma_start)
  // XXX handle overlaps

  vma *e = new vma();
-  if (e == 0)
+  if (e == 0) {
+    cprintf("vmap::insert: out of vmas\n");
    return -1;
+  }

  e->vma_start = vma_start;
  e->vma_end = vma_start + len;
  e->n = n;
  n->ref++;
  span.replace(new range(&cr, vma_start, len, e, 0));
-
  updatepages(pml4, (void*) e->vma_start, (void*) (e->vma_end-1), 0);
-
  return 0;
 }

@@ -307,10 +307,8 @@ vmap::remove(uptr vma_start, uptr len)
  // XXX handle partial unmap

  span.replace(0);
-
  updatepages(pml4, (void*) vma_start, (void*) (vma_start + len - 1), 0);
  tlbflush();
-
  return 0;
 }