1 /*
   2  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "oops/oop.inline.hpp"
  27 #include "runtime/hpi.hpp"
  28 #include "runtime/os.hpp"
  29 
  30 # include <sys/param.h>
  31 # include <dlfcn.h>
  32 
  33 typedef jint (JNICALL *init_t)(GetInterfaceFunc *, void *);
  34 
  35 void hpi::initialize_get_interface(vm_calls_t *callbacks)
  36 {
  37     char buf[JVM_MAXPATHLEN];
  38     void *hpi_handle;
  39     GetInterfaceFunc& getintf = _get_interface;
  40     jint (JNICALL * DLL_Initialize)(GetInterfaceFunc *, void *);
  41 
  42     if (HPILibPath && HPILibPath[0]) {
  43       strncpy(buf, HPILibPath, JVM_MAXPATHLEN - 1);
  44       buf[JVM_MAXPATHLEN - 1] = '\0';
  45     } else {
  46       const char *thread_type = "native_threads";
  47 
  48       os::jvm_path(buf, JVM_MAXPATHLEN);
  49 
  50 #ifdef PRODUCT
  51       const char * hpi_lib = "/libhpi.so";
  52 #else
  53       char * ptr = strrchr(buf, '/');
  54       assert(strstr(ptr, "/libjvm") == ptr, "invalid library name");
  55       const char * hpi_lib = strstr(ptr, "_g") ? "/libhpi_g.so" : "/libhpi.so";
  56 #endif
  57 
  58       *(strrchr(buf, '/')) = '\0';  /* get rid of /libjvm.so */
  59       char* p = strrchr(buf, '/');
  60       if (p != NULL) p[1] = '\0';   /* get rid of hotspot    */
  61       strcat(buf, thread_type);
  62       strcat(buf, hpi_lib);
  63     }
  64     /* we use RTLD_NOW because of bug 4032715 */
  65     if (TraceHPI)  tty->print_cr("Loading HPI %s ", buf);
  66     hpi_handle = dlopen(buf, RTLD_NOW);
  67     if (hpi_handle == NULL) {
  68         if (TraceHPI) tty->print_cr("HPI dlopen failed: %s", dlerror());
  69         return;
  70     }
  71     DLL_Initialize = CAST_TO_FN_PTR(jint (JNICALL *)(GetInterfaceFunc *, void *),
  72                                     dlsym(hpi_handle, "DLL_Initialize"));
  73     if (TraceHPI && DLL_Initialize == NULL) tty->print_cr("HPI dlsym of DLL_Initialize failed: %s", dlerror());
  74     if (DLL_Initialize == NULL ||
  75         (*DLL_Initialize)(&getintf, callbacks) < 0) {
  76         if (TraceHPI) tty->print_cr("HPI DLL_Initialize failed");
  77         return;
  78     }
  79     if (TraceHPI)  tty->print_cr("HPI loaded successfully");
  80 }