--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/runtime/safepointVerifiers.cpp Fri Mar 23 18:54:12 2018 +0100
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 1997, 2017, 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.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "runtime/safepointVerifiers.hpp"
+#include "gc/shared/collectedHeap.hpp"
+#include "memory/universe.hpp"
+#include "utilities/debug.hpp"
+
+// Implementation of NoGCVerifier
+
+#ifdef ASSERT
+
+NoGCVerifier::NoGCVerifier(bool verifygc) {
+ _verifygc = verifygc;
+ if (_verifygc) {
+ CollectedHeap* h = Universe::heap();
+ assert(!h->is_gc_active(), "GC active during NoGCVerifier");
+ _old_invocations = h->total_collections();
+ }
+}
+
+
+NoGCVerifier::~NoGCVerifier() {
+ if (_verifygc) {
+ CollectedHeap* h = Universe::heap();
+ assert(!h->is_gc_active(), "GC active during NoGCVerifier");
+ if (_old_invocations != h->total_collections()) {
+ fatal("collection in a NoGCVerifier secured function");
+ }
+ }
+}
+
+PauseNoGCVerifier::PauseNoGCVerifier(NoGCVerifier * ngcv) {
+ _ngcv = ngcv;
+ if (_ngcv->_verifygc) {
+ // if we were verifying, then make sure that nothing is
+ // wrong before we "pause" verification
+ CollectedHeap* h = Universe::heap();
+ assert(!h->is_gc_active(), "GC active during NoGCVerifier");
+ if (_ngcv->_old_invocations != h->total_collections()) {
+ fatal("collection in a NoGCVerifier secured function");
+ }
+ }
+}
+
+
+PauseNoGCVerifier::~PauseNoGCVerifier() {
+ if (_ngcv->_verifygc) {
+ // if we were verifying before, then reenable verification
+ CollectedHeap* h = Universe::heap();
+ assert(!h->is_gc_active(), "GC active during NoGCVerifier");
+ _ngcv->_old_invocations = h->total_collections();
+ }
+}
+
+#endif