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0
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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // Solaris_OS defines the interface to Solaris operating systems
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26
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27 class Solaris {
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28 friend class os;
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29
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30 private:
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31
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32 // Support for "new" libthread APIs for getting & setting thread context (2.8)
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33 #define TRS_VALID 0
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34 #define TRS_NONVOLATILE 1
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35 #define TRS_LWPID 2
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36 #define TRS_INVALID 3
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37
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38 // _T2_libthread is true if we believe we are running with the newer
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39 // SunSoft lib/lwp/libthread: default Solaris 9, available Solaris 8
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40 // which is a lightweight libthread that also supports all T1
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41 static bool _T2_libthread;
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42 // These refer to new libthread interface functions
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43 // They get intialized if we dynamically detect new libthread
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44 static int_fnP_thread_t_iP_uP_stack_tP_gregset_t _thr_getstate;
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45 static int_fnP_thread_t_i_gregset_t _thr_setstate;
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46 static int_fnP_thread_t_i _thr_setmutator;
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47 static int_fnP_thread_t _thr_suspend_mutator;
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48 static int_fnP_thread_t _thr_continue_mutator;
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49 // libthread_init sets the above, if the new functionality is detected
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50
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51 // initialized to libthread or lwp synchronization primitives depending on UseLWPSychronization
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52 static int_fnP_mutex_tP _mutex_lock;
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53 static int_fnP_mutex_tP _mutex_trylock;
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54 static int_fnP_mutex_tP _mutex_unlock;
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55 static int_fnP_mutex_tP_i_vP _mutex_init;
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56 static int_fnP_mutex_tP _mutex_destroy;
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57 static int _mutex_scope;
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58
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59 static int_fnP_cond_tP_mutex_tP_timestruc_tP _cond_timedwait;
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60 static int_fnP_cond_tP_mutex_tP _cond_wait;
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61 static int_fnP_cond_tP _cond_signal;
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62 static int_fnP_cond_tP _cond_broadcast;
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63 static int_fnP_cond_tP_i_vP _cond_init;
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64 static int_fnP_cond_tP _cond_destroy;
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65 static int _cond_scope;
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66
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67 typedef uintptr_t lgrp_cookie_t;
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68 typedef id_t lgrp_id_t;
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69 typedef enum lgrp_view {
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70 LGRP_VIEW_CALLER, /* what's available to the caller */
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71 LGRP_VIEW_OS /* what's available to operating system */
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72 } lgrp_view_t;
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73
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74 typedef lgrp_id_t (*lgrp_home_func_t)(idtype_t idtype, id_t id);
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75 typedef lgrp_cookie_t (*lgrp_init_func_t)(lgrp_view_t view);
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76 typedef int (*lgrp_fini_func_t)(lgrp_cookie_t cookie);
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77 typedef lgrp_id_t (*lgrp_root_func_t)(lgrp_cookie_t cookie);
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78 typedef int (*lgrp_children_func_t)(lgrp_cookie_t cookie, lgrp_id_t parent,
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79 lgrp_id_t *lgrp_array, uint_t lgrp_array_size);
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80 typedef int (*lgrp_nlgrps_func_t)(lgrp_cookie_t cookie);
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81 typedef int (*lgrp_cookie_stale_func_t)(lgrp_cookie_t cookie);
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82 typedef int (*meminfo_func_t)(const uint64_t inaddr[], int addr_count,
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83 const uint_t info_req[], int info_count,
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84 uint64_t outdata[], uint_t validity[]);
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85
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86 static lgrp_home_func_t _lgrp_home;
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87 static lgrp_init_func_t _lgrp_init;
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88 static lgrp_fini_func_t _lgrp_fini;
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89 static lgrp_root_func_t _lgrp_root;
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90 static lgrp_children_func_t _lgrp_children;
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91 static lgrp_nlgrps_func_t _lgrp_nlgrps;
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92 static lgrp_cookie_stale_func_t _lgrp_cookie_stale;
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93 static lgrp_cookie_t _lgrp_cookie;
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94
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95 static meminfo_func_t _meminfo;
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96
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97 // Large Page Support--mpss.
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98 static bool set_mpss_range(caddr_t start, size_t bytes, size_t align);
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99
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100 static void init_thread_fpu_state(void);
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101
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102 static void try_enable_extended_io();
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103
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104 // For signal-chaining
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105 static unsigned long sigs; // mask of signals that have
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106 // preinstalled signal handlers
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107 static struct sigaction *(*get_signal_action)(int);
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108 static struct sigaction *get_preinstalled_handler(int);
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109 static int (*get_libjsig_version)();
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110 static void save_preinstalled_handler(int, struct sigaction&);
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111 static void check_signal_handler(int sig);
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112
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113 // For overridable signals
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114 static int _SIGinterrupt; // user-overridable INTERRUPT_SIGNAL
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115 static int _SIGasync; // user-overridable ASYNC_SIGNAL
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116 static void set_SIGinterrupt(int newsig) { _SIGinterrupt = newsig; }
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117 static void set_SIGasync(int newsig) { _SIGasync = newsig; }
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118
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119
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120 public:
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121 // Large Page Support--ISM.
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122 static bool largepage_range(char* addr, size_t size);
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123
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124 static int SIGinterrupt() { return _SIGinterrupt; }
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125 static int SIGasync() { return _SIGasync; }
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126 static address handler_start, handler_end; // start and end pc of thr_sighndlrinfo
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127
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128 static bool valid_stack_address(Thread* thread, address sp);
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129 static bool valid_ucontext(Thread* thread, ucontext_t* valid, ucontext_t* suspect);
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130 static ucontext_t* get_valid_uc_in_signal_handler(Thread* thread,
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131 ucontext_t* uc);
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132
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133 static ExtendedPC ucontext_get_ExtendedPC(ucontext_t* uc);
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134 static intptr_t* ucontext_get_sp(ucontext_t* uc);
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135 // ucontext_get_fp() is only used by Solaris X86 (see note below)
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136 static intptr_t* ucontext_get_fp(ucontext_t* uc);
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137
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138 // For Analyzer Forte AsyncGetCallTrace profiling support:
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139 // Parameter ret_fp is only used by Solaris X86.
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140 //
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141 // We should have different declarations of this interface in
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142 // os_solaris_i486.hpp and os_solaris_sparc.hpp, but that file
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143 // provides extensions to the os class and not the Solaris class.
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144 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,
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145 intptr_t** ret_sp, intptr_t** ret_fp);
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146
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147 static void hotspot_sigmask(Thread* thread);
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148
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149 protected:
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150 // Solaris-specific interface goes here
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151 static julong available_memory();
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152 static julong physical_memory() { return _physical_memory; }
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153 static julong _physical_memory;
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154 static void initialize_system_info();
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155 static int _dev_zero_fd;
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156 static int get_dev_zero_fd() { return _dev_zero_fd; }
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157 static void set_dev_zero_fd(int fd) { _dev_zero_fd = fd; }
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158 static char* mmap_chunk(char *addr, size_t size, int flags, int prot);
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159 static bool mpss_sanity_check(bool warn, size_t * page_size);
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160 static bool ism_sanity_check (bool warn, size_t * page_size);
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161
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162 // Workaround for 4352906. thr_stksegment sometimes returns
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163 // a bad value for the primordial thread's stack base when
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164 // it is called more than one time.
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165 // Workaround is to cache the initial value to avoid further
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166 // calls to thr_stksegment.
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167 // It appears that someone (Hotspot?) is trashing the user's
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168 // proc_t structure (note that this is a system struct).
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169 static address _main_stack_base;
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170
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171 public:
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172 static void libthread_init();
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173 static void synchronization_init();
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174 static void liblgrp_init();
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175 // Load miscellaneous symbols.
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176 static void misc_sym_init();
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177 // This boolean allows users to forward their own non-matching signals
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178 // to JVM_handle_solaris_signal, harmlessly.
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179 static bool signal_handlers_are_installed;
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180
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181 static void signal_sets_init();
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182 static void install_signal_handlers();
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183 static void set_signal_handler(int sig, bool set_installed, bool oktochain);
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184 static void init_signal_mem();
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185 static bool is_sig_ignored(int sig);
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186 static void set_our_sigflags(int, int);
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187 static int get_our_sigflags(int);
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188
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189 // For signal-chaining
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190 static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
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191 // signal(), sigset() is loaded
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192 static struct sigaction *get_chained_signal_action(int sig);
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193 static bool chained_handler(int sig, siginfo_t *siginfo, void *context);
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194
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195 // The following allow us to link against both the old and new libthread (2.8)
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196 // and exploit the new libthread functionality if available.
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197
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198 static bool T2_libthread() { return _T2_libthread; }
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199 static void set_T2_libthread(bool T2_libthread) { _T2_libthread = T2_libthread; }
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200
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201 static int thr_getstate(thread_t tid, int *flag, unsigned *lwp, stack_t *ss, gregset_t rs)
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202 { return _thr_getstate(tid, flag, lwp, ss, rs); }
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203 static void set_thr_getstate(int_fnP_thread_t_iP_uP_stack_tP_gregset_t func)
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204 { _thr_getstate = func; }
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205
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206 static int thr_setstate(thread_t tid, int flag, gregset_t rs) { return _thr_setstate(tid, flag, rs); }
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207 static void set_thr_setstate(int_fnP_thread_t_i_gregset_t func) { _thr_setstate = func; }
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208
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209 static int thr_setmutator(thread_t tid, int enabled) { return _thr_setmutator(tid, enabled); }
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210 static void set_thr_setmutator(int_fnP_thread_t_i func) { _thr_setmutator = func; }
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211
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212 static int thr_suspend_mutator(thread_t tid) { return _thr_suspend_mutator(tid); }
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213 static void set_thr_suspend_mutator(int_fnP_thread_t func) { _thr_suspend_mutator = func; }
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214
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215 static int thr_continue_mutator(thread_t tid) { return _thr_continue_mutator(tid); }
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216 static void set_thr_continue_mutator(int_fnP_thread_t func) { _thr_continue_mutator = func; }
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217
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218 // Allows us to switch between lwp and thread -based synchronization
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219 static int mutex_lock(mutex_t *mx) { return _mutex_lock(mx); }
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220 static int mutex_trylock(mutex_t *mx) { return _mutex_trylock(mx); }
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221 static int mutex_unlock(mutex_t *mx) { return _mutex_unlock(mx); }
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222 static int mutex_init(mutex_t *mx) { return _mutex_init(mx, os::Solaris::mutex_scope(), NULL); }
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223 static int mutex_destroy(mutex_t *mx) { return _mutex_destroy(mx); }
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224 static int mutex_scope() { return _mutex_scope; }
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225
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226 static void set_mutex_lock(int_fnP_mutex_tP func) { _mutex_lock = func; }
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227 static void set_mutex_trylock(int_fnP_mutex_tP func) { _mutex_trylock = func; }
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228 static void set_mutex_unlock(int_fnP_mutex_tP func) { _mutex_unlock = func; }
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229 static void set_mutex_init(int_fnP_mutex_tP_i_vP func) { _mutex_init = func; }
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230 static void set_mutex_destroy(int_fnP_mutex_tP func) { _mutex_destroy = func; }
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231 static void set_mutex_scope(int scope) { _mutex_scope = scope; }
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232
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233 static int cond_timedwait(cond_t *cv, mutex_t *mx, timestruc_t *abst)
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234 { return _cond_timedwait(cv, mx, abst); }
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235 static int cond_wait(cond_t *cv, mutex_t *mx) { return _cond_wait(cv, mx); }
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236 static int cond_signal(cond_t *cv) { return _cond_signal(cv); }
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237 static int cond_broadcast(cond_t *cv) { return _cond_broadcast(cv); }
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238 static int cond_init(cond_t *cv) { return _cond_init(cv, os::Solaris::cond_scope(), NULL); }
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239 static int cond_destroy(cond_t *cv) { return _cond_destroy(cv); }
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240 static int cond_scope() { return _cond_scope; }
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241
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242 static void set_cond_timedwait(int_fnP_cond_tP_mutex_tP_timestruc_tP func)
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243 { _cond_timedwait = func; }
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244 static void set_cond_wait(int_fnP_cond_tP_mutex_tP func) { _cond_wait = func; }
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245 static void set_cond_signal(int_fnP_cond_tP func) { _cond_signal = func; }
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246 static void set_cond_broadcast(int_fnP_cond_tP func) { _cond_broadcast = func; }
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247 static void set_cond_init(int_fnP_cond_tP_i_vP func) { _cond_init = func; }
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248 static void set_cond_destroy(int_fnP_cond_tP func) { _cond_destroy = func; }
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249 static void set_cond_scope(int scope) { _cond_scope = scope; }
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250
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251 static void set_lgrp_home(lgrp_home_func_t func) { _lgrp_home = func; }
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252 static void set_lgrp_init(lgrp_init_func_t func) { _lgrp_init = func; }
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253 static void set_lgrp_fini(lgrp_fini_func_t func) { _lgrp_fini = func; }
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254 static void set_lgrp_root(lgrp_root_func_t func) { _lgrp_root = func; }
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255 static void set_lgrp_children(lgrp_children_func_t func) { _lgrp_children = func; }
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256 static void set_lgrp_nlgrps(lgrp_nlgrps_func_t func) { _lgrp_nlgrps = func; }
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257 static void set_lgrp_cookie_stale(lgrp_cookie_stale_func_t func) { _lgrp_cookie_stale = func; }
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258 static void set_lgrp_cookie(lgrp_cookie_t cookie) { _lgrp_cookie = cookie; }
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259
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260 static id_t lgrp_home(idtype_t type, id_t id) { return _lgrp_home != NULL ? _lgrp_home(type, id) : -1; }
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261 static lgrp_cookie_t lgrp_init(lgrp_view_t view) { return _lgrp_init != NULL ? _lgrp_init(view) : 0; }
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262 static int lgrp_fini(lgrp_cookie_t cookie) { return _lgrp_fini != NULL ? _lgrp_fini(cookie) : -1; }
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263 static lgrp_id_t lgrp_root(lgrp_cookie_t cookie) { return _lgrp_root != NULL ? _lgrp_root(cookie) : -1; };
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264 static int lgrp_children(lgrp_cookie_t cookie, lgrp_id_t parent,
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265 lgrp_id_t *lgrp_array, uint_t lgrp_array_size) {
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266 return _lgrp_children != NULL ? _lgrp_children(cookie, parent, lgrp_array, lgrp_array_size) : -1;
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267 }
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268 static int lgrp_nlgrps(lgrp_cookie_t cookie) { return _lgrp_nlgrps != NULL ? _lgrp_nlgrps(cookie) : -1; }
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269 static int lgrp_cookie_stale(lgrp_cookie_t cookie) {
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270 return _lgrp_cookie_stale != NULL ? _lgrp_cookie_stale(cookie) : -1;
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271 }
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272 static lgrp_cookie_t lgrp_cookie() { return _lgrp_cookie; }
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273
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274 static void set_meminfo(meminfo_func_t func) { _meminfo = func; }
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275 static int meminfo (const uint64_t inaddr[], int addr_count,
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276 const uint_t info_req[], int info_count,
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277 uint64_t outdata[], uint_t validity[]) {
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278 return _meminfo != NULL ? _meminfo(inaddr, addr_count, info_req, info_count,
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279 outdata, validity) : -1;
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280 }
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281
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282 enum {
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283 clear_interrupted = true
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284 };
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285 static void setup_interruptible(JavaThread* thread);
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286 static void setup_interruptible_already_blocked(JavaThread* thread);
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287 static JavaThread* setup_interruptible();
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288 static void cleanup_interruptible(JavaThread* thread);
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289
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290 // perf counter incrementers used by _INTERRUPTIBLE
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291
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292 static void bump_interrupted_before_count();
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293 static void bump_interrupted_during_count();
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294
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295 #ifdef ASSERT
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296 static JavaThread* setup_interruptible_native();
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297 static void cleanup_interruptible_native(JavaThread* thread);
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298 #endif
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299
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300 static sigset_t* unblocked_signals();
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301 static sigset_t* vm_signals();
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302 static sigset_t* allowdebug_blocked_signals();
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303
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304 // %%% Following should be promoted to os.hpp:
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305 // Trace number of created threads
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306 static jint _os_thread_limit;
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307 static volatile jint _os_thread_count;
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308
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309 // Minimum stack size a thread can be created with (allowing
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310 // the VM to completely create the thread and enter user code)
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311
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312 static size_t min_stack_allowed;
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313
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314 // Stack overflow handling
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315
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316 static int max_register_window_saves_before_flushing();
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317
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318 // Stack repair handling
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319
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320 // none present
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321
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322 };
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323
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324 class PlatformEvent : public CHeapObj {
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325 private:
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326 double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line
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327 volatile int _Event ;
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328 int _nParked ;
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329 int _pipev [2] ;
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330 mutex_t _mutex [1] ;
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331 cond_t _cond [1] ;
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332 double PostPad [2] ;
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333
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334 protected:
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335 // Defining a protected ctor effectively gives us an abstract base class.
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336 // That is, a PlatformEvent can never be instantiated "naked" but only
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337 // as a part of a ParkEvent (recall that ParkEvent extends PlatformEvent).
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338 // TODO-FIXME: make dtor private
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339 ~PlatformEvent() { guarantee (0, "invariant") ; }
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340 PlatformEvent() {
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341 int status;
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342 status = os::Solaris::cond_init(_cond);
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343 assert_status(status == 0, status, "cond_init");
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344 status = os::Solaris::mutex_init(_mutex);
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345 assert_status(status == 0, status, "mutex_init");
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346 _Event = 0 ;
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347 _nParked = 0 ;
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348 _pipev[0] = _pipev[1] = -1 ;
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349 }
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350
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351 public:
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352 // Exercise caution using reset() and fired() -- they may require MEMBARs
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353 void reset() { _Event = 0 ; }
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354 int fired() { return _Event; }
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355 void park () ;
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356 int park (jlong millis) ;
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357 int TryPark () ;
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358 void unpark () ;
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359 } ;
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360
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361 class PlatformParker : public CHeapObj {
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362 protected:
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363 mutex_t _mutex [1] ;
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364 cond_t _cond [1] ;
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365
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366 public: // TODO-FIXME: make dtor private
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367 ~PlatformParker() { guarantee (0, "invariant") ; }
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368
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369 public:
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370 PlatformParker() {
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371 int status;
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372 status = os::Solaris::cond_init(_cond);
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373 assert_status(status == 0, status, "cond_init");
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374 status = os::Solaris::mutex_init(_mutex);
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375 assert_status(status == 0, status, "mutex_init");
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376 }
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377 } ;
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