Fix for bug 6767 - Limit stack trace collection for stack overflow exceptions.

runtime/vm/object_store.cc

Index: runtime/vm/object_store.cc
===================================================================
--- runtime/vm/object_store.cc	(revision 19067)
+++ runtime/vm/object_store.cc	(working copy)
@@ -87,6 +87,7 @@
     empty_context_(Context::null()),
     stack_overflow_(Instance::null()),
     out_of_memory_(Instance::null()),
+    preallocated_stack_trace_(Stacktrace::null()),
     keyword_symbols_(Array::null()),
     receive_port_create_function_(Function::null()),
     lookup_receive_port_function_(Function::null()),
@@ -114,12 +115,14 @@
 bool ObjectStore::PreallocateObjects() {
   Isolate* isolate = Isolate::Current();
   ASSERT(isolate != NULL && isolate->object_store() == this);
-  if (this->stack_overflow() != Instance::null() &&
-      this->out_of_memory() != Instance::null()) {
+  if (this->stack_overflow() != Instance::null()) {
+    ASSERT(this->out_of_memory() != Instance::null());
+    ASSERT(this->preallocated_stack_trace() != Stacktrace::null());
     return true;
   }
   ASSERT(this->stack_overflow() == Instance::null());
   ASSERT(this->out_of_memory() == Instance::null());
+  ASSERT(this->preallocated_stack_trace() == Stacktrace::null());
   // TODO(regis): Reenable this code for arm and mips when possible.
 #if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64)
   Object& result = Object::Handle();
@@ -136,6 +139,17 @@
     return false;
   }
   set_out_of_memory(Instance::Cast(result));
+  const Array& func_array = Array::Handle(
+      isolate,
+      Array::New(Stacktrace::kPreallocatedStackdepth, Heap::kOld));
+  const Array& code_array = Array::Handle(
+      isolate,
+      Array::New(Stacktrace::kPreallocatedStackdepth, Heap::kOld));
+  const Array& pc_offset_array = Array::Handle(
+      isolate,
+      Array::New(Stacktrace::kPreallocatedStackdepth, Heap::kOld));
+  result = Stacktrace::New(func_array, code_array, pc_offset_array);
+  set_preallocated_stack_trace(Stacktrace::Cast(result));
 #endif
   return true;
 }