src/share/vm/runtime/thread.cpp

*** 322,331 ****
--- 322,335 ----
    }
  #if INCLUDE_NMT
    // record thread's native stack, stack grows downward
    MemTracker::record_thread_stack(stack_end(), stack_size());
  #endif // INCLUDE_NMT
+   log_debug(os)("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);
  }
  
  
  Thread::~Thread() {
    // Reclaim the objectmonitors from the omFreeList of the moribund thread.
*** 1800,1809 ****
--- 1804,1817 ----
      }
  
      // Call after last event on thread
      EVENT_THREAD_EXIT(this);
  
+     log_debug(os)("Thread " UINTX_FORMAT " %s.",
+       os::current_thread_id(),
+       exit_type == JavaThread::normal_exit ? "exiting" : "detaching");
+ 
      // Call Thread.exit(). We try 3 times in case we got another Thread.stop during
      // the execution of the method. If that is not enough, then we don't really care. Thread.stop
      // is deprecated anyhow.
      if (!is_Compiler_thread()) {
        int count = 3;
*** 2489,2510 ****
  
    int allocate = os::allocate_stack_guard_pages();
    // 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.");
      return;
    }
  
    if (os::guard_memory((char *) low_addr, len)) {
      _stack_guard_state = stack_guard_enabled;
    } else {
!     warning("Attempt to protect stack guard pages failed.");
      if (os::uncommit_memory((char *) low_addr, len)) {
!       warning("Attempt to deallocate stack guard pages failed.");
      }
    }
  }
  
  void JavaThread::remove_stack_guard_pages() {
    assert(Thread::current() == this, "from different thread");
    if (_stack_guard_state == stack_guard_unused) return;
--- 2497,2525 ----
  
    int allocate = os::allocate_stack_guard_pages();
    // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len);
  
    if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) {
!     log_warning(os)("Attempt to allocate stack guard pages failed.");
      return;
    }
  
    if (os::guard_memory((char *) low_addr, len)) {
      _stack_guard_state = stack_guard_enabled;
    } else {
!     log_warning(os)("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)) {
!       log_warning(os)("Attempt to deallocate stack guard pages failed.");
      }
+     return;
    }
+ 
+   log_debug(os)("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() {
    assert(Thread::current() == this, "from different thread");
    if (_stack_guard_state == stack_guard_unused) return;
*** 2513,2532 ****
  
    if (os::allocate_stack_guard_pages()) {
      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.");
      }
    } 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.");
      }
    }
  }
  
  void JavaThread::enable_stack_reserved_zone() {
    assert(_stack_guard_state != stack_guard_unused, "must be using guard pages.");
    assert(_stack_guard_state != stack_guard_enabled, "already enabled");
--- 2528,2556 ----
  
    if (os::allocate_stack_guard_pages()) {
      if (os::remove_stack_guard_pages((char *) low_addr, len)) {
        _stack_guard_state = stack_guard_unused;
      } else {
!       log_warning(os)("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 {
!       log_warning(os)("Attempt to unprotect stack guard pages failed ("
!         PTR_FORMAT "-" PTR_FORMAT ").", p2i(low_addr), p2i(low_addr + len));
!       return;
      }
    }
+ 
+   log_debug(os)("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() {
    assert(_stack_guard_state != stack_guard_unused, "must be using guard pages.");
    assert(_stack_guard_state != stack_guard_enabled, "already enabled");