- Trigger old-gen GCs when needed.

vm/heap.cc

Index: vm/heap.cc
===================================================================
--- vm/heap.cc	(revision 2587)
+++ vm/heap.cc	(working copy)
@@ -54,7 +54,7 @@
   if (addr != 0) {
     return addr;
   }
-  new_space_->Scavenge();
+  CollectGarbage(kNew);
   if (FLAG_verbose_gc) {
     OS::PrintErr("New space (%dk) Old space (%dk) Code space (%dk)\n",
                  (new_space_->in_use() / KB),
@@ -73,8 +73,14 @@
   ASSERT(Isolate::Current()->no_gc_scope_depth() == 0);
   uword addr = old_space_->TryAllocate(size);
   if (addr == 0) {
-    // TODO(iposva): Support GC.
-    FATAL("Exhausted heap space.");
+    CollectGarbage(kOld);
+    if (FLAG_verbose_gc) {
+      OS::PrintErr("New space (%dk) Old space (%dk) Code space (%dk)\n",
+                   (new_space_->in_use() / KB),
+                   (old_space_->in_use() / KB),
+                   (code_space_->in_use() / KB));
+    }
+    addr = old_space_->TryAllocate(size);
   }
   return addr;
 }