From 0cc98b7468fe1ee280f61ec8933ea0289b5a330d Mon Sep 17 00:00:00 2001
From: Clive Verghese <verghese@amazon.com>
Date: Wed, 4 Aug 2021 22:06:19 +0000
Subject: [PATCH] Fix LinuxThreads detection in MUSL

---
 .../src/solaris/native/sun/tools/attach/LinuxVirtualMachine.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/jdk/src/solaris/native/sun/tools/attach/LinuxVirtualMachine.c b/src/jdk/src/solaris/native/sun/tools/attach/LinuxVirtualMachine.c
index 6017308d0b..a583b4bae8 100644
--- openjdk/jdk/src/solaris/native/sun/tools/attach/LinuxVirtualMachine.c
+++ openjdk/jdk/src/solaris/native/sun/tools/attach/LinuxVirtualMachine.c
@@ -195,6 +195,9 @@ JNIEXPORT void JNICALL Java_sun_tools_attach_LinuxVirtualMachine_connect
 JNIEXPORT jboolean JNICALL Java_sun_tools_attach_LinuxVirtualMachine_isLinuxThreads
   (JNIEnv *env, jclass cls)
 {
+# ifdef MUSL_LIBC
+   return JNI_FALSE;
+# else
 # ifndef _CS_GNU_LIBPTHREAD_VERSION
 # define _CS_GNU_LIBPTHREAD_VERSION 3
 # endif
@@ -222,6 +225,7 @@ JNIEXPORT jboolean JNICALL Java_sun_tools_attach_LinuxVirtualMachine_isLinuxThre
     res = (jboolean)(strstr(s, "NPTL") == NULL);
     free(s);
     return res;
+# endif
 }
 
 /*