jdk

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/*
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 * Copyright (c) 2019, 2023, Oracle and/or its affiliates. All rights reserved.
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 * Copyright (c) 2019 SAP SE. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "runtime/globals.hpp"
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#include "runtime/os.hpp"
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#include "utilities/virtualizationSupport.hpp"
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static void *dlHandle = nullptr;
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static GuestLib_StatGet_t GuestLib_StatGet = nullptr;
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static GuestLib_StatFree_t GuestLib_StatFree = nullptr;
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static bool has_host_information = false;
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static bool has_resource_information = false;
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// host + resource information; avoid the session and other special info vectors
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static char host_information[300];
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static char extended_resource_info_at_startup[600];
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void VirtualizationSupport::initialize() {
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  if (!ExtensiveErrorReports) return;
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  // open vmguestlib and bind SDK functions
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  char ebuf[1024];
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  dlHandle = os::dll_load("vmGuestLib", ebuf, sizeof ebuf);
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#ifdef LINUX
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  if (dlHandle == nullptr) {
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    // the open-vm-tools have a different guest lib name
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    // on some distros e.g. SLES12 the open-vm-tools are the default,
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    // so use the different libname as a fallback
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    dlHandle = os::dll_load("/usr/lib64/libguestlib.so.0", ebuf, sizeof ebuf);
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  }
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#endif
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  if (dlHandle == nullptr) {
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    return;
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  }
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  GuestLib_StatGet = CAST_TO_FN_PTR(GuestLib_StatGet_t, os::dll_lookup(dlHandle, "VMGuestLib_StatGet"));
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  GuestLib_StatFree = CAST_TO_FN_PTR(GuestLib_StatFree_t, os::dll_lookup(dlHandle, "VMGuestLib_StatFree"));
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  if (GuestLib_StatGet != nullptr && GuestLib_StatFree != nullptr) {
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    char* result_info = nullptr;
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    size_t result_size = 0;
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    VMGuestLibError sg_error = GuestLib_StatGet("text", "resources", &result_info, &result_size);
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    if (sg_error == VMGUESTLIB_ERROR_SUCCESS) {
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      has_resource_information = true;
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      os::snprintf(extended_resource_info_at_startup, sizeof(extended_resource_info_at_startup), "%s", result_info);
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      GuestLib_StatFree(result_info, result_size);
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    }
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    sg_error = GuestLib_StatGet("text", "host", &result_info, &result_size);
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    if (sg_error == VMGUESTLIB_ERROR_SUCCESS) {
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      has_host_information = true;
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      os::snprintf(host_information, sizeof(host_information), "%s", result_info);
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      GuestLib_StatFree(result_info, result_size);
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    }
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  }
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}
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void VirtualizationSupport::print_virtualization_info(outputStream* st) {
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  if (has_host_information) {
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    st->print_cr("vSphere host information:");
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    st->print_cr("%s", host_information);
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  }
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  // resource info at startup
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  if (has_resource_information) {
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    st->print_cr("vSphere resource information collected at VM startup:");
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    st->print_cr("%s", extended_resource_info_at_startup);
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  }
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  // current resource info
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  if (GuestLib_StatGet != nullptr && GuestLib_StatFree != nullptr) {
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    char* result_info = nullptr;
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    size_t result_size = 0;
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    VMGuestLibError sg_error = GuestLib_StatGet("text", "resources", &result_info, &result_size);
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    if (sg_error == VMGUESTLIB_ERROR_SUCCESS) {
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      st->print_cr("vSphere resource information available now:");
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      st->print_cr("%s", result_info);
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      GuestLib_StatFree(result_info, result_size);
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    }
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  }
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}
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