After fixing the following bug:

    JDK-8283651 nsk/jvmti/SuspendThread/suspendthrd003 may leak native memory

I decided to search test/hotspot/jtreg/vmTestbase/nsk/share for
more problematic uses of JVM/TI GetThreadInfo() and I found
one more:

int isThreadExpected(jvmtiEnv *jvmti, jthread thread) {
    static const char *vm_jfr_buffer_thread_name = "VM JFR Buffer Thread";
    static const char *jfr_request_timer_thread_name = "JFR request timer";
    static const char *graal_management_bean_registration_thread_name =
                                            "HotSpotGraalManagement Bean Registration"; 
    static const char *graal_compiler_thread_name_prefix = "JVMCI CompilerThread";
    static const size_t prefixLength = strlen(graal_compiler_thread_name_prefix);

    jvmtiThreadInfo threadinfo;
    NSK_JVMTI_VERIFY(jvmti->GetThreadInfo(thread, &threadinfo));
        
    if (strcmp(threadinfo.name, vm_jfr_buffer_thread_name) == 0)
        return 0;
    
    if (strcmp(threadinfo.name, jfr_request_timer_thread_name) == 0)
        return 0;
        
    if (strcmp(threadinfo.name, graal_management_bean_registration_thread_name) == 0)   
        return 0;

    if ((strlen(threadinfo.name) > prefixLength) &&
         strncmp(threadinfo.name, graal_compiler_thread_name_prefix, prefixLength) == 0)
        return 0;

    return 1;
} 

The call to JVM/TI GetThreadInfo() returns allocated
memory in the 'threadinfo.name field and this function
does not clean that up.