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annotate src/os/aix/vm/libperfstat_aix.cpp @ 21947:9f70fc90169d

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Truffle: remove expensive assertion
author Andreas Woess <andreas.woess@oracle.com>
date Wed, 17 Jun 2015 04:09:30 +0200
parents 666e6ce3976c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright 2012, 2013 SAP AG. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "runtime/arguments.hpp"
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26 #include "libperfstat_aix.hpp"
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27
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28 // For dlopen and friends
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29 #include <fcntl.h>
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30
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31 // handle to the libperfstat
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32 static void* g_libhandle = NULL;
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33
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34 // whether initialization worked
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35 static bool g_initialized = false;
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36
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37
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38 typedef int (*fun_perfstat_cpu_total_t) (perfstat_id_t *name, perfstat_cpu_total_t* userbuff,
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39 int sizeof_userbuff, int desired_number);
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40
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41 typedef int (*fun_perfstat_memory_total_t) (perfstat_id_t *name, perfstat_memory_total_t* userbuff,
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42 int sizeof_userbuff, int desired_number);
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43
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44 typedef void (*fun_perfstat_reset_t) ();
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45
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46 static fun_perfstat_cpu_total_t g_fun_perfstat_cpu_total = NULL;
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47 static fun_perfstat_memory_total_t g_fun_perfstat_memory_total = NULL;
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48 static fun_perfstat_reset_t g_fun_perfstat_reset = NULL;
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49
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50 bool libperfstat::init() {
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51
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52 if (g_initialized) {
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53 return true;
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54 }
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55
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56 g_initialized = false;
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57
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58 // dynamically load the libperfstat porting library.
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59 g_libhandle = dlopen("/usr/lib/libperfstat.a(shr_64.o)", RTLD_MEMBER | RTLD_NOW);
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60 if (!g_libhandle) {
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61 if (Verbose) {
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62 fprintf(stderr, "Cannot load libperfstat.a (dlerror: %s)", dlerror());
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63 }
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64 return false;
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65 }
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66
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67 // resolve function pointers
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68
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69 #define RESOLVE_FUN_NO_ERROR(name) \
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70 g_fun_##name = (fun_##name##_t) dlsym(g_libhandle, #name);
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71
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72 #define RESOLVE_FUN(name) \
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73 RESOLVE_FUN_NO_ERROR(name) \
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74 if (!g_fun_##name) { \
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75 if (Verbose) { \
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76 fprintf(stderr, "Cannot resolve " #name "() from libperfstat.a\n" \
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77 " (dlerror: %s)", dlerror()); \
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78 } \
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79 return false; \
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80 }
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81
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82 RESOLVE_FUN(perfstat_cpu_total);
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83 RESOLVE_FUN(perfstat_memory_total);
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84 RESOLVE_FUN(perfstat_reset);
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85
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86 g_initialized = true;
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87
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88 return true;
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89 }
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90
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91 void libperfstat::cleanup() {
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92
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93 g_initialized = false;
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94
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95 if (g_libhandle) {
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96 dlclose(g_libhandle);
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97 g_libhandle = NULL;
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98 }
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99
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100 g_fun_perfstat_cpu_total = NULL;
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101 g_fun_perfstat_memory_total = NULL;
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102 g_fun_perfstat_reset = NULL;
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103 }
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104
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105 int libperfstat::perfstat_memory_total(perfstat_id_t *name,
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106 perfstat_memory_total_t* userbuff,
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107 int sizeof_userbuff, int desired_number) {
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108 assert(g_initialized, "libperfstat not initialized");
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109 assert(g_fun_perfstat_memory_total, "");
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110 return g_fun_perfstat_memory_total(name, userbuff, sizeof_userbuff, desired_number);
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111 }
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112
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113 int libperfstat::perfstat_cpu_total(perfstat_id_t *name, perfstat_cpu_total_t* userbuff,
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114 int sizeof_userbuff, int desired_number) {
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115 assert(g_initialized, "libperfstat not initialized");
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116 assert(g_fun_perfstat_cpu_total, "");
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117 return g_fun_perfstat_cpu_total(name, userbuff, sizeof_userbuff, desired_number);
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118 }
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119
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120 void libperfstat::perfstat_reset() {
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121 assert(g_initialized, "libperfstat not initialized");
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122 assert(g_fun_perfstat_reset, "");
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123 g_fun_perfstat_reset();
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124 }