From 4d4138d0916177dcd58e1345bb9df24ea1aea5a7 Mon Sep 17 00:00:00 2001
From: Ralf Schmelter <ralf.schmelter@sap.com>
Date: Mon, 7 Aug 2023 14:16:55 +0200
Subject: [PATCH] Delete old test

---
 .../gtest/nmt/test_virtualMemoryTracker.cpp   | 91 -------------------
 1 file changed, 91 deletions(-)
 delete mode 100644 test/hotspot/gtest/nmt/test_virtualMemoryTracker.cpp

diff --git a/test/hotspot/gtest/nmt/test_virtualMemoryTracker.cpp b/test/hotspot/gtest/nmt/test_virtualMemoryTracker.cpp
deleted file mode 100644
index d63c1d0565637..0000000000000
--- a/test/hotspot/gtest/nmt/test_virtualMemoryTracker.cpp
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- * 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.
- */
-
-#include "precompiled.hpp"
-#include "runtime/os.hpp"
-#include "services/memTracker.hpp"
-#include "services/virtualMemoryTracker.hpp"
-#include "unittest.hpp"
-
-static size_t get_committed() {
-  VirtualMemorySnapshot snapshot;
-  VirtualMemorySummary::snapshot(&snapshot);
-
-  return snapshot.by_type(mtThreadStack)->committed();
-}
-
-TEST_VM(VirtualMemoryTracker, MissingRemoveReleasedRegion) {
-  if (!MemTracker::enabled()) {
-    return;
-  }
-
-  // Simulate the case where we miss the ending of a thread.
-  for (int i = 100; i >= 0; --i) {
-    size_t size = 1024 * 1024;
-    NativeCallStack empty_stack;
-
-    // Get a region of mapped memory not tracked by the virtual memory tracker.
-    address base = (address) os::reserve_memory(2 * size, false);
-    VirtualMemoryTracker::remove_released_region(base, 2 * size);
-    size_t init_sz = get_committed();
-
-    // Reserve and commit everything. We have to, since getting the snapshot 'detects'
-    // committed but not reported memory for thread stacks and the detection will not work
-    // on MacOSX (not implemented).
-    VirtualMemoryTracker::add_reserved_region(base, size, empty_stack, mtThreadStack);
-    VirtualMemoryTracker::add_committed_region(base, size, empty_stack);
-
-    // Now pretend we have forgotten to call remove_released_region and allocate an new
-    // overlapping region with some commited memory.
-    VirtualMemoryTracker::add_reserved_region(base + size / 2, size, empty_stack, mtThreadStack);
-    VirtualMemoryTracker::add_committed_region(base + size / 2, size, empty_stack);
-
-    // And remove some of the the committed memory again by reserving a partially overlappinbg region.
-    VirtualMemoryTracker::add_reserved_region(base, size, empty_stack, mtThreadStack);
-    VirtualMemoryTracker::add_committed_region(base, size, empty_stack);
-    size_t new_sz = get_committed();
-
-    // Give back the memory.
-    VirtualMemoryTracker::remove_released_region(base, size);
-    VirtualMemoryTracker::add_reserved_region(base, 2 * size, empty_stack, mtThreadStack);
-    os::release_memory((char*) base, 2 * size);
-
-    // If a parallel thread committed memory concurrently, we get a wrong test result.
-    // This should not happen often, so try a few times.
-    if (new_sz - size == init_sz) {
-      break;
-    }
-
-    // If it fails too often log the values we see.
-    if (i < 50) {
-      tty->print_cr("init_sz: %d, new_sz %d, diff %d, region_size %d", (int) init_sz, (int) new_sz, (int) (new_sz - init_sz), (int) size);
-    }
-
-    // Trigger a test failure on the last run.
-    if (i == 0) {
-      EXPECT_TRUE(new_sz - size == init_sz) << "new_sz: " << new_sz << ", init_sz: " << init_sz <<
-                                               ", diff: " << (new_sz - init_sz) << ", region size: " << size;
-    }
-  }
-}