--- a/hotspot/src/share/vm/runtime/thread.cpp	Wed Jul 05 21:25:35 2017 +0200
+++ b/hotspot/src/share/vm/runtime/thread.cpp	Sat Mar 05 20:46:42 2016 -0800
@@ -324,6 +324,10 @@
   // record thread's native stack, stack grows downward
   MemTracker::record_thread_stack(stack_end(), stack_size());
 #endif // INCLUDE_NMT
+  log_debug(os, thread)("Thread " UINTX_FORMAT " stack dimensions: "
+    PTR_FORMAT "-" PTR_FORMAT " (" SIZE_FORMAT "k).",
+    os::current_thread_id(), p2i(stack_base() - stack_size()),
+    p2i(stack_base()), stack_size()/1024);
 }
 
 
@@ -1690,7 +1694,7 @@
 
   EventThreadStart event;
   if (event.should_commit()) {
-    event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj()));
+    event.set_thread(THREAD_TRACE_ID(this));
     event.commit();
   }
 
@@ -1795,7 +1799,7 @@
     // from java_lang_Thread object
     EventThreadEnd event;
     if (event.should_commit()) {
-      event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj()));
+      event.set_thread(THREAD_TRACE_ID(this));
       event.commit();
     }
 
@@ -1924,6 +1928,10 @@
   }
 #endif // INCLUDE_ALL_GCS
 
+  log_info(os, thread)("JavaThread %s (tid: " UINTX_FORMAT ").",
+    exit_type == JavaThread::normal_exit ? "exiting" : "detaching",
+    os::current_thread_id());
+
   // Remove from list of active threads list, and notify VM thread if we are the last non-daemon thread
   Threads::remove(this);
 }
@@ -2491,18 +2499,25 @@
   // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len);
 
   if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) {
-    warning("Attempt to allocate stack guard pages failed.");
+    log_warning(os, thread)("Attempt to allocate stack guard pages failed.");
     return;
   }
 
   if (os::guard_memory((char *) low_addr, len)) {
     _stack_guard_state = stack_guard_enabled;
   } else {
-    warning("Attempt to protect stack guard pages failed.");
+    log_warning(os, thread)("Attempt to protect stack guard pages failed ("
+      PTR_FORMAT "-" PTR_FORMAT ").", p2i(low_addr), p2i(low_addr + len));
     if (os::uncommit_memory((char *) low_addr, len)) {
-      warning("Attempt to deallocate stack guard pages failed.");
+      log_warning(os, thread)("Attempt to deallocate stack guard pages failed.");
     }
+    return;
   }
+
+  log_debug(os, thread)("Thread " UINTX_FORMAT " stack guard pages activated: "
+    PTR_FORMAT "-" PTR_FORMAT ".",
+    os::current_thread_id(), p2i(low_addr), p2i(low_addr + len));
+
 }
 
 void JavaThread::remove_stack_guard_pages() {
@@ -2515,16 +2530,25 @@
     if (os::remove_stack_guard_pages((char *) low_addr, len)) {
       _stack_guard_state = stack_guard_unused;
     } else {
-      warning("Attempt to deallocate stack guard pages failed.");
+      log_warning(os, thread)("Attempt to deallocate stack guard pages failed ("
+        PTR_FORMAT "-" PTR_FORMAT ").", p2i(low_addr), p2i(low_addr + len));
+      return;
     }
   } else {
     if (_stack_guard_state == stack_guard_unused) return;
     if (os::unguard_memory((char *) low_addr, len)) {
       _stack_guard_state = stack_guard_unused;
     } else {
-      warning("Attempt to unprotect stack guard pages failed.");
+      log_warning(os, thread)("Attempt to unprotect stack guard pages failed ("
+        PTR_FORMAT "-" PTR_FORMAT ").", p2i(low_addr), p2i(low_addr + len));
+      return;
     }
   }
+
+  log_debug(os, thread)("Thread " UINTX_FORMAT " stack guard pages removed: "
+    PTR_FORMAT "-" PTR_FORMAT ".",
+    os::current_thread_id(), p2i(low_addr), p2i(low_addr + len));
+
 }
 
 void JavaThread::enable_stack_reserved_zone() {
@@ -3530,6 +3554,10 @@
     return status;
   }
 
+  if (TRACE_INITIALIZE() != JNI_OK) {
+    vm_exit_during_initialization("Failed to initialize tracing backend");
+  }
+
   // Should be done after the heap is fully created
   main_thread->cache_global_variables();
 
@@ -3598,11 +3626,6 @@
 
   quicken_jni_functions();
 
-  // Must be run after init_ft which initializes ft_enabled
-  if (TRACE_INITIALIZE() != JNI_OK) {
-    vm_exit_during_initialization("Failed to initialize tracing backend");
-  }
-
   // No more stub generation allowed after that point.
   StubCodeDesc::freeze();
 
@@ -4110,6 +4133,7 @@
   if (version == JNI_VERSION_1_4) return JNI_TRUE;
   if (version == JNI_VERSION_1_6) return JNI_TRUE;
   if (version == JNI_VERSION_1_8) return JNI_TRUE;
+  if (version == JNI_VERSION_9) return JNI_TRUE;
   return JNI_FALSE;
 }