From 14475e47b616fb43da20fc2a45850de4dbf6c7d0 Mon Sep 17 00:00:00 2001
From: Tobias Hartmann <thartmann@openjdk.org>
Date: Thu, 7 Nov 2019 07:02:55 +0100
Subject: [PATCH] 8233491: Crash in AdapterHandlerLibrary::get_adapter with CDS
 due to code cache exhaustion

Added null check.

Reviewed-by: kvn, iklam
---
 src/hotspot/share/runtime/sharedRuntime.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hotspot/share/runtime/sharedRuntime.cpp b/src/hotspot/share/runtime/sharedRuntime.cpp
index 735878a86b5..3f7e7e44f20 100644
--- a/src/hotspot/share/runtime/sharedRuntime.cpp
+++ b/src/hotspot/share/runtime/sharedRuntime.cpp
@@ -2615,7 +2615,7 @@ AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* finger
 
 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& method) {
   AdapterHandlerEntry* entry = get_adapter0(method);
-  if (method->is_shared()) {
+  if (entry != NULL && method->is_shared()) {
     // See comments around Method::link_method()
     MutexLocker mu(AdapterHandlerLibrary_lock);
     if (method->adapter() == NULL) {