jdk

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/*
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 * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
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 * Copyright (c) 2015, 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 "libodm_aix.hpp"
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#include "misc_aix.hpp"
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#include <stdlib.h>
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#include <dlfcn.h>
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#include <string.h>
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#include "runtime/arguments.hpp"
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#include "runtime/os.hpp"
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dynamicOdm::dynamicOdm() {
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  const char* libodmname = "/usr/lib/libodm.a(shr_64.o)";
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  char ebuf[512];
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  _libhandle = os::dll_load(libodmname, ebuf, sizeof(ebuf));
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  if (!_libhandle) {
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    trcVerbose("Cannot load %s (error %s)", libodmname, ebuf);
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    return;
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  }
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  _odm_initialize  = (fun_odm_initialize )dlsym(_libhandle, "odm_initialize" );
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  _odm_set_path    = (fun_odm_set_path   )dlsym(_libhandle, "odm_set_path"   );
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  _odm_mount_class = (fun_odm_mount_class)dlsym(_libhandle, "odm_mount_class");
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  _odm_get_obj     = (fun_odm_get_obj    )dlsym(_libhandle, "odm_get_obj"    );
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  _odm_terminate   = (fun_odm_terminate  )dlsym(_libhandle, "odm_terminate"  );
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  if (!_odm_initialize || !_odm_set_path || !_odm_mount_class || !_odm_get_obj || !_odm_terminate) {
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    trcVerbose("Couldn't find all required odm symbols from %s", libodmname);
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    os::dll_unload(_libhandle);
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    _libhandle = nullptr;
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    return;
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  }
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}
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dynamicOdm::~dynamicOdm() {
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  if (_libhandle) { os::dll_unload(_libhandle); }
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}
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void odmWrapper::clean_data() { if (_data) { free(_data); _data = nullptr; } }
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int odmWrapper::class_offset(const char *field, bool is_aix_5)
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{
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  assert(has_class(), "initialization");
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  for (int i = 0; i < odm_class()->nelem; i++) {
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    if (strcmp(odm_class()->elem[i].elemname, field) == 0) {
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      int offset = odm_class()->elem[i].offset;
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      if (is_aix_5) { offset += LINK_VAL_OFFSET; }
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      return offset;
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    }
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  }
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  return -1;
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}
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void odmWrapper::determine_os_kernel_version(uint32_t* p_ver) {
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  int major_aix_version = ((*p_ver) >> 24) & 0xFF,
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      minor_aix_version = ((*p_ver) >> 16) & 0xFF;
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  assert(*p_ver, "must be initialized");
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  odmWrapper odm("product", "/usr/lib/objrepos"); // could also use "lpp"
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  if (!odm.has_class()) {
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    trcVerbose("try_determine_os_kernel_version: odm init problem");
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    return;
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  }
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  int voff, roff, moff, foff;
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  bool is_aix_5 = (major_aix_version == 5);
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  voff = odm.class_offset("ver", is_aix_5);
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  roff = odm.class_offset("rel", is_aix_5);
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  moff = odm.class_offset("mod", is_aix_5);
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  foff = odm.class_offset("fix", is_aix_5);
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  if (voff == -1 || roff == -1 || moff == -1 || foff == -1) {
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    trcVerbose("try_determine_os_kernel_version: could not get offsets");
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    return;
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  }
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  if (!odm.retrieve_obj("name='bos.mp64'")) {
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    trcVerbose("try_determine_os_kernel_version: odm_get_obj failed");
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    return;
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  }
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  int version, release, modification, fix_level;
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  do {
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    version      = odm.read_short(voff);
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    release      = odm.read_short(roff);
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    modification = odm.read_short(moff);
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    fix_level    = odm.read_short(foff);
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    trcVerbose("odm found version: %d.%d.%d.%d", version, release, modification, fix_level);
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    if (version >> 8 != 0 || release >> 8 != 0 || modification >> 8 != 0 || fix_level >> 8 != 0) {
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      trcVerbose("8 bit numbers expected");
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      return;
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    }
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  } while (odm.retrieve_obj());
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  if (version != major_aix_version || release != minor_aix_version) {
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    trcVerbose("version determined by odm does not match uname");
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    return;
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  }
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  *p_ver = version << 24 | release << 16 | modification << 8 | fix_level;
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}
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