From b05454bcaba1c78bc0e9712490a76b0e959827cb Mon Sep 17 00:00:00 2001
From: Stefan Johansson <stefan.johansson@oracle.com>
Date: Fri, 27 Mar 2026 10:29:01 +0000
Subject: [PATCH] Handle potential failure better

---
 src/hotspot/share/jfr/jni/jfrJniMethod.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/hotspot/share/jfr/jni/jfrJniMethod.cpp b/src/hotspot/share/jfr/jni/jfrJniMethod.cpp
index 915d59d00a7..0183bf634f6 100644
--- a/src/hotspot/share/jfr/jni/jfrJniMethod.cpp
+++ b/src/hotspot/share/jfr/jni/jfrJniMethod.cpp
@@ -412,8 +412,10 @@ JVM_END
 
 JVM_ENTRY_NO_ENV(jlong, jfr_host_memory_usage(JNIEnv* env, jclass jvm))
   physical_memory_size_type memory_usage = 0;
-  // Return value ignored - defaulting to 0 on failure.
-  (void)os::Machine::used_memory(memory_usage);
+  if (!os::Machine::used_memory(memory_usage)) {
+    // Return -1 to signal failure to get memory usage.
+    return static_cast<jlong>(-1);
+  }
   return static_cast<jlong>(memory_usage);
 JVM_END