8318447: Move NMT source code to own subdirectory

Reviewed-by: stefank, dholmes, stuefe

src/hotspot/share/nmt/mallocTracker.inline.hpp

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2023 SAP SE. All rights reserved.
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_NMT_MALLOCTRACKER_INLINE_HPP
+#define SHARE_NMT_MALLOCTRACKER_INLINE_HPP
+
+#include "nmt/mallocTracker.hpp"
+#include "services/mallocLimit.hpp"
+#include "utilities/debug.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+// Returns true if allocating s bytes on f would trigger either global or the category limit
+inline bool MallocMemorySummary::check_exceeds_limit(size_t s, MEMFLAGS f) {
+
+  // Note: checks are ordered to have as little impact as possible on the standard code path,
+  // when MallocLimit is unset, resp. it is set but we have reached no limit yet.
+  // Somewhat expensive are:
+  // - as_snapshot()->total(), total malloc load (requires iteration over arena types)
+  // - VMError::is_error_reported() is a load from a volatile.
+  if (MallocLimitHandler::have_limit()) {
+
+    // Global Limit ?
+    const malloclimit* l = MallocLimitHandler::global_limit();
+    if (l->sz > 0) {
+      size_t so_far = as_snapshot()->total();
+      if ((so_far + s) > l->sz) { // hit the limit
+        return total_limit_reached(s, so_far, l);
+      }
+    } else {
+      // Category Limit?
+      l = MallocLimitHandler::category_limit(f);
+      if (l->sz > 0) {
+        const MallocMemory* mm = as_snapshot()->by_type(f);
+        size_t so_far = mm->malloc_size() + mm->arena_size();
+        if ((so_far + s) > l->sz) {
+          return category_limit_reached(f, s, so_far, l);
+        }
+      }
+    }
+  }
+
+  return false;
+}
+
+inline bool MallocTracker::check_exceeds_limit(size_t s, MEMFLAGS f) {
+  return MallocMemorySummary::check_exceeds_limit(s, f);
+}
+
+
+#endif // SHARE_NMT_MALLOCTRACKER_INLINE_HPP