diff a/src/hotspot/share/gc/shenandoah/shenandoahController.cpp b/src/hotspot/share/gc/shenandoah/shenandoahController.cpp
--- /dev/null
+++ b/src/hotspot/share/gc/shenandoah/shenandoahController.cpp
@@ -0,0 +1,112 @@
+/*
+ * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+#include "precompiled.hpp"
+
+#include "gc/shared/gc_globals.hpp"
+#include "gc/shenandoah/shenandoahController.hpp"
+#include "gc/shenandoah/shenandoahHeap.hpp"
+#include "gc/shenandoah/shenandoahHeapRegion.inline.hpp"
+
+void ShenandoahController::pacing_notify_alloc(size_t words) {
+  assert(ShenandoahPacing, "should only call when pacing is enabled");
+  Atomic::add(&_allocs_seen, words, memory_order_relaxed);
+}
+
+size_t ShenandoahController::reset_allocs_seen() {
+  return Atomic::xchg(&_allocs_seen, (size_t)0, memory_order_relaxed);
+}
+
+void ShenandoahController::prepare_for_graceful_shutdown() {
+  _graceful_shutdown.set();
+}
+
+bool ShenandoahController::in_graceful_shutdown() {
+  return _graceful_shutdown.is_set();
+}
+
+void ShenandoahController::update_gc_id() {
+  Atomic::inc(&_gc_id);
+}
+
+size_t ShenandoahController::get_gc_id() {
+  return Atomic::load(&_gc_id);
+}
+
+void ShenandoahController::handle_alloc_failure(ShenandoahAllocRequest& req, bool block) {
+  ShenandoahHeap* heap = ShenandoahHeap::heap();
+
+  assert(current()->is_Java_thread(), "expect Java thread here");
+  bool is_humongous = req.size() > ShenandoahHeapRegion::humongous_threshold_words();
+
+  if (try_set_alloc_failure_gc(is_humongous)) {
+    // Only report the first allocation failure
+    log_info(gc)("Failed to allocate %s, " SIZE_FORMAT "%s",
+                 req.type_string(),
+                 byte_size_in_proper_unit(req.size() * HeapWordSize), proper_unit_for_byte_size(req.size() * HeapWordSize));
+
+    // Now that alloc failure GC is scheduled, we can abort everything else
+    heap->cancel_gc(GCCause::_allocation_failure);
+  }
+
+
+  if (block) {
+    MonitorLocker ml(&_alloc_failure_waiters_lock);
+    while (is_alloc_failure_gc()) {
+      ml.wait();
+    }
+  }
+}
+
+void ShenandoahController::handle_alloc_failure_evac(size_t words) {
+  ShenandoahHeap* heap = ShenandoahHeap::heap();
+  bool is_humongous = (words > ShenandoahHeapRegion::region_size_words());
+
+  if (try_set_alloc_failure_gc(is_humongous)) {
+    // Only report the first allocation failure
+    log_info(gc)("Failed to allocate " SIZE_FORMAT "%s for evacuation",
+                 byte_size_in_proper_unit(words * HeapWordSize), proper_unit_for_byte_size(words * HeapWordSize));
+  }
+
+  // Forcefully report allocation failure
+  heap->cancel_gc(GCCause::_shenandoah_allocation_failure_evac);
+}
+
+void ShenandoahController::notify_alloc_failure_waiters() {
+  _alloc_failure_gc.unset();
+  _humongous_alloc_failure_gc.unset();
+  MonitorLocker ml(&_alloc_failure_waiters_lock);
+  ml.notify_all();
+}
+
+bool ShenandoahController::try_set_alloc_failure_gc(bool is_humongous) {
+  if (is_humongous) {
+    _humongous_alloc_failure_gc.try_set();
+  }
+  return _alloc_failure_gc.try_set();
+}
+
+bool ShenandoahController::is_alloc_failure_gc() {
+  return _alloc_failure_gc.is_set();
+}
+
