1 /* 2 * Copyright 2012, 2013 SAP AG. 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 "runtime/arguments.hpp" 26 #include "libperfstat_aix.hpp" 27 28 // For dlopen and friends 29 #include <fcntl.h> 30 31 // handle to the libperfstat 32 static void* g_libhandle = NULL; 33 34 // whether initialization worked 35 static bool g_initialized = false; 36 37 38 typedef int (*fun_perfstat_cpu_total_t) (perfstat_id_t *name, perfstat_cpu_total_t* userbuff, 39 int sizeof_userbuff, int desired_number); 40 41 typedef int (*fun_perfstat_memory_total_t) (perfstat_id_t *name, perfstat_memory_total_t* userbuff, 42 int sizeof_userbuff, int desired_number); 43 44 typedef void (*fun_perfstat_reset_t) (); 45 46 static fun_perfstat_cpu_total_t g_fun_perfstat_cpu_total = NULL; 47 static fun_perfstat_memory_total_t g_fun_perfstat_memory_total = NULL; 48 static fun_perfstat_reset_t g_fun_perfstat_reset = NULL; 49 50 bool libperfstat::init() { 51 52 if (g_initialized) { 53 return true; 54 } 55 56 g_initialized = false; 57 58 // dynamically load the libperfstat porting library. 59 g_libhandle = dlopen("/usr/lib/libperfstat.a(shr_64.o)", RTLD_MEMBER | RTLD_NOW); 60 if (!g_libhandle) { 61 if (Verbose) { 62 fprintf(stderr, "Cannot load libperfstat.a (dlerror: %s)", dlerror()); 63 } 64 return false; 65 } 66 67 // resolve function pointers 68 69 #define RESOLVE_FUN_NO_ERROR(name) \ 70 g_fun_##name = (fun_##name##_t) dlsym(g_libhandle, #name); 71 72 #define RESOLVE_FUN(name) \ 73 RESOLVE_FUN_NO_ERROR(name) \ 74 if (!g_fun_##name) { \ 75 if (Verbose) { \ 76 fprintf(stderr, "Cannot resolve " #name "() from libperfstat.a\n" \ 77 " (dlerror: %s)", dlerror()); \ 78 } \ 79 return false; \ 80 } 81 82 RESOLVE_FUN(perfstat_cpu_total); 83 RESOLVE_FUN(perfstat_memory_total); 84 RESOLVE_FUN(perfstat_reset); 85 86 g_initialized = true; 87 88 return true; 89 } 90 91 void libperfstat::cleanup() { 92 93 g_initialized = false; 94 95 if (g_libhandle) { 96 dlclose(g_libhandle); 97 g_libhandle = NULL; 98 } 99 100 g_fun_perfstat_cpu_total = NULL; 101 g_fun_perfstat_memory_total = NULL; 102 g_fun_perfstat_reset = NULL; 103 } 104 105 int libperfstat::perfstat_memory_total(perfstat_id_t *name, 106 perfstat_memory_total_t* userbuff, 107 int sizeof_userbuff, int desired_number) { 108 assert(g_initialized, "libperfstat not initialized"); 109 assert(g_fun_perfstat_memory_total, ""); 110 return g_fun_perfstat_memory_total(name, userbuff, sizeof_userbuff, desired_number); 111 } 112 113 int libperfstat::perfstat_cpu_total(perfstat_id_t *name, perfstat_cpu_total_t* userbuff, 114 int sizeof_userbuff, int desired_number) { 115 assert(g_initialized, "libperfstat not initialized"); 116 assert(g_fun_perfstat_cpu_total, ""); 117 return g_fun_perfstat_cpu_total(name, userbuff, sizeof_userbuff, desired_number); 118 } 119 120 void libperfstat::perfstat_reset() { 121 assert(g_initialized, "libperfstat not initialized"); 122 assert(g_fun_perfstat_reset, ""); 123 g_fun_perfstat_reset(); 124 }