1 /*
   2  * Copyright (c) 1999, 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     char buf[JVM_MAXPATHLEN];
  37     void *hpi_handle;
  38     GetInterfaceFunc& getintf = _get_interface;
  39     jint (JNICALL * DLL_Initialize)(GetInterfaceFunc *, void *);
  40 
  41     if (HPILibPath && HPILibPath[0]) {
  42       strncpy(buf, HPILibPath, JVM_MAXPATHLEN - 1);
  43       buf[JVM_MAXPATHLEN - 1] = '\0';
  44     } else {
  45       const char *thread_type = "native_threads";
  46 
  47       os::jvm_path(buf, JVM_MAXPATHLEN);
  48 
  49 #ifdef PRODUCT
  50       const char * hpi_lib = "/libhpi.so";
  51 #else
  52       char * ptr = strrchr(buf, '/');
  53       assert(strstr(ptr, "/libjvm") == ptr, "invalid library name");
  54       const char * hpi_lib = strstr(ptr, "_g") ? "/libhpi_g.so" : "/libhpi.so";
  55 #endif
  56 
  57       *(strrchr(buf, '/')) = '\0';  /* get rid of /libjvm.so */
  58       char* p = strrchr(buf, '/');
  59       if (p != NULL) p[1] = '\0';   /* get rid of hotspot    */
  60       strcat(buf, thread_type);
  61       strcat(buf, hpi_lib);
  62     }
  63 
  64     if (TraceHPI) tty->print_cr("Loading HPI %s ", buf);
  65 #ifdef SPARC
  66     // On 64-bit Ubuntu Sparc RTLD_NOW leads to unresolved deps in libpthread.so
  67 #   define OPEN_MODE RTLD_LAZY
  68 #else
  69     // We use RTLD_NOW because of bug 4032715
  70 #   define OPEN_MODE RTLD_NOW
  71 #endif
  72     hpi_handle = dlopen(buf, OPEN_MODE);
  73 #undef OPEN_MODE
  74 
  75     if (hpi_handle == NULL) {
  76         if (TraceHPI) tty->print_cr("HPI dlopen failed: %s", dlerror());
  77         return;
  78     }
  79     DLL_Initialize = CAST_TO_FN_PTR(jint (JNICALL *)(GetInterfaceFunc *, void *),
  80                                     dlsym(hpi_handle, "DLL_Initialize"));
  81     if (TraceHPI && DLL_Initialize == NULL) tty->print_cr("HPI dlsym of DLL_Initialize failed: %s", dlerror());
  82     if (DLL_Initialize == NULL ||
  83         (*DLL_Initialize)(&getintf, callbacks) < 0) {
  84         if (TraceHPI) tty->print_cr("HPI DLL_Initialize failed");
  85         return;
  86     }
  87     if (TraceHPI)  tty->print_cr("HPI loaded successfully");
  88 }