src/hotspot/share/gc/shenandoah/shenandoahPacer.cpp

rev 56803 : 8233520: Shenandoah: do not sleep when threads are attaching
Reviewed-by: XXX

*** 236,245 ****
--- 236,254 ----
    // Fast path: try to allocate right away
    if (claim_for_alloc(words, false)) {
      return;
    }
  
+   // Threads that are attaching should not block at all: they are not
+   // fully initialized yet. Calling sleep() on them would be awkward.
+   // This is probably the path that allocates the thread oop itself.
+   // Forcefully claim without waiting.
+   if (JavaThread::current()->is_attaching_via_jni()) {
+     claim_for_alloc(words, true);
+     return;
+   }
+ 
    size_t max = ShenandoahPacingMaxDelay;
    double start = os::elapsedTime();
  
    size_t total = 0;
    size_t cur = 0;