From bd26df9efb8b765bb40fcfeef3e8908e77bfb15f Mon Sep 17 00:00:00 2001
Date: Fri, 22 Jan 2021 11:14:02 +0800
Subject: AARCH64 fix itable stub code size limit

---
 hotspot/src/cpu/aarch64/vm/vtableStubs_aarch64.cpp | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/hotspot/src/cpu/aarch64/vm/vtableStubs_aarch64.cpp b/hotspot/src/cpu/aarch64/vm/vtableStubs_aarch64.cpp
index d8d1ec11b..645b690da 100644
--- a/hotspot/src/cpu/aarch64/vm/vtableStubs_aarch64.cpp
+++ b/hotspot/src/cpu/aarch64/vm/vtableStubs_aarch64.cpp
@@ -130,6 +130,10 @@ VtableStub* VtableStubs::create_itable_stub(int itable_index) {
   // returned by pd_code_size_limit!
   const int code_length = VtableStub::pd_code_size_limit(false);
   VtableStub* s = new(code_length) VtableStub(false, itable_index);
+  // Can be NULL if there is no free space in the code cache.
+  if (s == NULL) {
+    return NULL;
+  }
   ResourceMark rm;
   CodeBuffer cb(s->entry_point(), code_length);
   MacroAssembler* masm = new MacroAssembler(&cb);
@@ -222,10 +226,12 @@ int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
   if (CountCompiledCalls)
     size += 6 * 4;
   // FIXME: vtable stubs only need 36 bytes
-  if (is_vtable_stub)
+  if (is_vtable_stub) {
     size += 52;
-  else
-    size += 176;
+  } else {
+    // itable code size limit, see issue#983
+    size += 192;
+  }
   return size;
 
   // In order to tune these parameters, run the JVM with VM options
-- 
2.19.0