From d6b4aa01a20eb7ecd44602a9fab3e3380bff3d3a Mon Sep 17 00:00:00 2001
From: Olga Mikhaltsova <omikhaltcova@openjdk.org>
Date: Thu, 30 Nov 2023 08:15:34 +0000
Subject: [PATCH] 8318157: RISC-V: implement ensureMaterializedForStackWalk
 intrinsic

Reviewed-by: fyang
---
 src/hotspot/cpu/riscv/riscv.ad | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/hotspot/cpu/riscv/riscv.ad b/src/hotspot/cpu/riscv/riscv.ad
index 87f240873a8..70e787206ce 100644
--- a/src/hotspot/cpu/riscv/riscv.ad
+++ b/src/hotspot/cpu/riscv/riscv.ad
@@ -2378,6 +2378,11 @@ encode %{
         ciEnv::current()->record_failure("CodeCache is full");
         return;
       }
+    } else if (_method->intrinsic_id() == vmIntrinsicID::_ensureMaterializedForStackWalk) {
+      // The NOP here is purely to ensure that eliding a call to
+      // JVM_EnsureMaterializedForStackWalk doesn't change the code size.
+      __ nop();
+      __ block_comment("call JVM_EnsureMaterializedForStackWalk (elided)");
     } else {
       int method_index = resolved_method_index(cbuf);
       RelocationHolder rspec = _optimized_virtual ? opt_virtual_call_Relocation::spec(method_index)