How to print all thread's stack

I want to print all thread's stack so I change the function

void Java_java_lang_Throwable_printStackTrace(Thread* THREAD) {
       UsingFastOops fast_oops;
       JavaFrame frame(THREAD);
       Throwable::Fast throwable = frame.local_at(0)->as_obj();
       throwable().print_stack_trace();
}

to

/*I want to call this function in native function, so I remove THREAD*/
void Java_java_lang_Throwable_printStackTrace0() {
  printf("vvvvvvvvvvvvvvvvvvvvvvvvvvv\r\n");
  Thread::Raw thread = Universe::global_threadlist();
  while (thread.not_null()) {
       UsingFastOops fast_oops;
       JavaFrame frame(&thread());
       Throwable::Fast throwable = frame.local_at(0)->as_obj();
       throwable().print_stack_trace();
       thread = thread().global_next();
  }
  printf("^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n");
}

But it always fails

Any suggestion is welcomed.

gan

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