Limit number of loop iterations in Heap::ReserveSpace.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index abeaf078042951cfef912f33e4cc69dfe592be8e..7c379f3f29965a0f1e726971c1a87d56575c0407 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -571,7 +571,9 @@ void Heap::ReserveSpace(
   PagedSpace* cell_space = Heap::cell_space();
   LargeObjectSpace* lo_space = Heap::lo_space();
   bool gc_performed = true;
-  while (gc_performed) {
+  int counter = 0;
+  static const int kThreshold = 20;
+  while (gc_performed && counter++ < kThreshold) {
     gc_performed = false;
     if (!new_space->ReserveSpace(new_space_size)) {
       Heap::CollectGarbage(NEW_SPACE);
@@ -610,6 +612,11 @@ void Heap::ReserveSpace(
       gc_performed = true;
     }
   }
+
+  if (gc_performed) {
+    // Failed to reserve the space after several attempts.
+    V8::FatalProcessOutOfMemory("Heap::ReserveSpace");
+  }
 }