1 | /* |
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2 | * thread.c - thread operations implementation (user & kernel) |
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3 | * |
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4 | * Author Ghassan Almaless (2008,2009,2010,2011,2012) |
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5 | * Alain Greiner (2016,2017,2018,2019) |
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6 | * |
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7 | * Copyright (c) UPMC Sorbonne Universites |
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8 | * |
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9 | * This file is part of ALMOS-MKH. |
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10 | * |
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11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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12 | * under the terms of the GNU General Public License as published by |
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13 | * the Free Software Foundation; version 2.0 of the License. |
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14 | * |
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15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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18 | * General Public License for more details. |
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19 | * |
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20 | * You should have received a copy of the GNU General Public License |
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21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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23 | */ |
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24 | |
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25 | #include <kernel_config.h> |
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26 | #include <hal_kernel_types.h> |
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27 | #include <hal_context.h> |
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28 | #include <hal_irqmask.h> |
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29 | #include <hal_special.h> |
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30 | #include <hal_remote.h> |
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31 | #include <hal_vmm.h> |
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32 | #include <memcpy.h> |
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33 | #include <printk.h> |
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34 | #include <cluster.h> |
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35 | #include <process.h> |
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36 | #include <scheduler.h> |
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37 | #include <dev_pic.h> |
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38 | #include <core.h> |
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39 | #include <list.h> |
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40 | #include <xlist.h> |
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41 | #include <page.h> |
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42 | #include <kmem.h> |
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43 | #include <ppm.h> |
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44 | #include <thread.h> |
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45 | #include <rpc.h> |
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46 | |
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47 | ////////////////////////////////////////////////////////////////////////////////////// |
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48 | // Extern global variables |
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49 | ////////////////////////////////////////////////////////////////////////////////////// |
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50 | |
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51 | extern process_t process_zero; // allocated in kernel_init.c |
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52 | extern char * lock_type_str[]; // allocated in kernel_init.c |
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53 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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54 | |
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55 | ////////////////////////////////////////////////////////////////////////////////////// |
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56 | // This function returns a printable string for the thread type. |
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57 | ////////////////////////////////////////////////////////////////////////////////////// |
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58 | const char * thread_type_str( thread_type_t type ) |
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59 | { |
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60 | switch ( type ) { |
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61 | case THREAD_USER: return "USR"; |
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62 | case THREAD_RPC: return "RPC"; |
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63 | case THREAD_DEV: return "DEV"; |
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64 | case THREAD_IDLE: return "IDL"; |
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65 | default: return "undefined"; |
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66 | } |
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67 | } |
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68 | |
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69 | ///////////////////////////////////////////////////////////////////////////////////// |
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70 | // This static function allocates physical memory for a thread descriptor. |
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71 | // It can be called by the three functions: |
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72 | // - thread_user_create() |
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73 | // - thread_user_fork() |
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74 | // - thread_kernel_create() |
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75 | ///////////////////////////////////////////////////////////////////////////////////// |
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76 | // @ return pointer on thread descriptor if success / return NULL if failure. |
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77 | ///////////////////////////////////////////////////////////////////////////////////// |
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78 | static thread_t * thread_alloc( void ) |
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79 | { |
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80 | page_t * page; // pointer on page descriptor containing thread descriptor |
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81 | kmem_req_t req; // kmem request |
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82 | |
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83 | // allocates memory for thread descriptor + kernel stack |
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84 | req.type = KMEM_PAGE; |
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85 | req.size = CONFIG_THREAD_DESC_ORDER; |
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86 | req.flags = AF_KERNEL | AF_ZERO; |
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87 | page = kmem_alloc( &req ); |
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88 | |
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89 | if( page == NULL ) return NULL; |
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90 | |
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91 | // return pointer on new thread descriptor |
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92 | xptr_t base_xp = ppm_page2base( XPTR(local_cxy , page ) ); |
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93 | return GET_PTR( base_xp ); |
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94 | |
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95 | } // end thread_alloc() |
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96 | |
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97 | |
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98 | ///////////////////////////////////////////////////////////////////////////////////// |
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99 | // This static function initializes a thread descriptor (kernel or user). |
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100 | // It can be called by the four functions: |
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101 | // - thread_user_create() |
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102 | // - thread_user_fork() |
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103 | // - thread_kernel_create() |
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104 | // - thread_idle_init() |
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105 | // The "type" and "trdid" fields must have been previously set. |
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106 | // It updates the local DQDT. |
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107 | ///////////////////////////////////////////////////////////////////////////////////// |
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108 | // @ thread : pointer on local thread descriptor |
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109 | // @ process : pointer on local process descriptor. |
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110 | // @ type : thread type. |
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111 | // @ trdid : thread identifier |
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112 | // @ func : pointer on thread entry function. |
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113 | // @ args : pointer on thread entry function arguments. |
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114 | // @ core_lid : target core local index. |
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115 | // @ user_stack_vseg : local pointer on user stack vseg (user thread only) |
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116 | ///////////////////////////////////////////////////////////////////////////////////// |
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117 | static error_t thread_init( thread_t * thread, |
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118 | process_t * process, |
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119 | thread_type_t type, |
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120 | trdid_t trdid, |
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121 | void * func, |
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122 | void * args, |
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123 | lid_t core_lid, |
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124 | vseg_t * user_stack_vseg ) |
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125 | { |
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126 | |
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127 | // check type and trdid fields initialized |
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128 | assert( (thread->type == type) , "bad type argument" ); |
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129 | assert( (thread->trdid == trdid) , "bad trdid argument" ); |
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130 | |
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131 | #if DEBUG_THREAD_INIT |
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132 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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133 | thread_t * this = CURRENT_THREAD; |
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134 | if( DEBUG_THREAD_INIT < cycle ) |
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135 | printk("\n[%s] thread[%x,%x] enter for thread %x in process %x / cycle %d\n", |
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136 | __FUNCTION__, this->process->pid, this->trdid, thread->trdid, process->pid , cycle ); |
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137 | #endif |
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138 | |
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139 | // compute thread descriptor size without kernel stack |
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140 | uint32_t desc_size = (intptr_t)(&thread->signature) - (intptr_t)thread + 4; |
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141 | |
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142 | // Initialize new thread descriptor |
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143 | thread->quantum = 0; // TODO |
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144 | thread->ticks_nr = 0; // TODO |
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145 | thread->time_last_check = 0; // TODO |
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146 | thread->core = &LOCAL_CLUSTER->core_tbl[core_lid]; |
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147 | thread->process = process; |
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148 | thread->busylocks = 0; |
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149 | |
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150 | #if DEBUG_BUSYLOCK |
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151 | xlist_root_init( XPTR( local_cxy , &thread->busylocks_root ) ); |
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152 | #endif |
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153 | |
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154 | thread->user_stack_vseg = user_stack_vseg; |
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155 | thread->k_stack_base = (intptr_t)thread + desc_size; |
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156 | thread->k_stack_size = CONFIG_THREAD_DESC_SIZE - desc_size; |
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157 | thread->entry_func = func; // thread entry point |
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158 | thread->entry_args = args; // thread function arguments |
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159 | thread->flags = 0; // all flags reset |
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160 | thread->errno = 0; // no error detected |
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161 | thread->fork_user = 0; // no user defined placement for fork |
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162 | thread->fork_cxy = 0; // user defined target cluster for fork |
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163 | thread->blocked = THREAD_BLOCKED_GLOBAL; |
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164 | |
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165 | // initialize sched list |
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166 | list_entry_init( &thread->sched_list ); |
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167 | |
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168 | // initialize waiting queue entries |
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169 | list_entry_init( &thread->wait_list ); |
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170 | xlist_entry_init( XPTR( local_cxy , &thread->wait_xlist ) ); |
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171 | |
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172 | // initialize thread info |
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173 | memset( &thread->info , 0 , sizeof(thread_info_t) ); |
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174 | |
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175 | // initialize join_lock |
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176 | remote_busylock_init( XPTR( local_cxy , &thread->join_lock ), LOCK_THREAD_JOIN ); |
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177 | |
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178 | // initialise signature |
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179 | thread->signature = THREAD_SIGNATURE; |
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180 | |
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181 | // FIXME define and call an architecture specific hal_thread_init() |
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182 | // function to initialise the save_sr field |
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183 | thread->save_sr = 0xFF13; |
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184 | |
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185 | // register new thread in core scheduler |
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186 | sched_register_thread( thread->core , thread ); |
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187 | |
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188 | // update DQDT |
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189 | dqdt_increment_threads(); |
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190 | |
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191 | #if DEBUG_THREAD_INIT |
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192 | cycle = (uint32_t)hal_get_cycles(); |
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193 | if( DEBUG_THREAD_INIT < cycle ) |
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194 | printk("\n[%s] thread[%x,%x] exit for thread %x in process %x / cycle %d\n", |
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195 | __FUNCTION__, this->process->pid, this->trdid, thread, process->pid, cycle ); |
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196 | #endif |
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197 | |
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198 | return 0; |
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199 | |
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200 | } // end thread_init() |
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201 | |
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202 | ////////////////////////////////////////////////// |
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203 | error_t thread_user_create( pid_t pid, |
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204 | void * start_func, |
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205 | void * start_arg, |
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206 | pthread_attr_t * attr, |
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207 | thread_t ** new_thread ) |
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208 | { |
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209 | error_t error; |
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210 | thread_t * thread; // pointer on created thread descriptor |
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211 | trdid_t trdid; // created thred identifier |
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212 | process_t * process; // pointer to local process descriptor |
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213 | lid_t core_lid; // selected core local index |
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214 | vseg_t * us_vseg; // user stack vseg |
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215 | |
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216 | assert( (attr != NULL) , "pthread attributes must be defined" ); |
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217 | |
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218 | #if DEBUG_THREAD_USER_CREATE |
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219 | thread_t * this = CURRENT_THREAD; |
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220 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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221 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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222 | printk("\n[%s] thread[%x,%x] enter in cluster %x for process %x / cycle %d\n", |
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223 | __FUNCTION__, this->process->pid , this->trdid , local_cxy , pid , cycle ); |
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224 | #endif |
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225 | |
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226 | // get process descriptor local copy |
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227 | process = process_get_local_copy( pid ); |
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228 | |
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229 | if( process == NULL ) |
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230 | { |
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231 | printk("\n[ERROR] in %s : cannot get process descriptor %x\n", |
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232 | __FUNCTION__ , pid ); |
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233 | return -1; |
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234 | } |
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235 | |
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236 | #if( DEBUG_THREAD_USER_CREATE & 1) |
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237 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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238 | printk("\n[%s] process descriptor = %x for process %x in cluster %x\n", |
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239 | __FUNCTION__, process , pid , local_cxy ); |
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240 | #endif |
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241 | |
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242 | // select a target core in local cluster |
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243 | if( attr->attributes & PT_ATTR_CORE_DEFINED ) |
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244 | { |
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245 | core_lid = attr->lid; |
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246 | if( core_lid >= LOCAL_CLUSTER->cores_nr ) |
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247 | { |
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248 | printk("\n[ERROR] in %s : illegal core index attribute = %d\n", |
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249 | __FUNCTION__ , core_lid ); |
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250 | return -1; |
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251 | } |
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252 | } |
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253 | else |
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254 | { |
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255 | core_lid = cluster_select_local_core(); |
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256 | } |
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257 | |
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258 | #if( DEBUG_THREAD_USER_CREATE & 1) |
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259 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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260 | printk("\n[%s] core[%x,%d] selected\n", |
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261 | __FUNCTION__, local_cxy , core_lid ); |
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262 | #endif |
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263 | |
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264 | // allocate memory for thread descriptor |
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265 | thread = thread_alloc(); |
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266 | |
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267 | if( thread == NULL ) |
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268 | { |
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269 | printk("\n[ERROR] in %s : cannot create new thread in cluster %x\n", |
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270 | __FUNCTION__, local_cxy ); |
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271 | return -1; |
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272 | } |
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273 | |
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274 | #if( DEBUG_THREAD_USER_CREATE & 1) |
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275 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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276 | printk("\n[%s] new thread descriptor %x allocated\n", |
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277 | __FUNCTION__, thread ); |
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278 | #endif |
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279 | |
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280 | // set type in thread descriptor |
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281 | thread->type = THREAD_USER; |
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282 | |
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283 | // register new thread in process descriptor, and get a TRDID |
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284 | error = process_register_thread( process, thread , &trdid ); |
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285 | |
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286 | if( error ) |
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287 | { |
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288 | printk("\n[ERROR] in %s : cannot register new thread in process %x\n", |
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289 | __FUNCTION__, pid ); |
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290 | thread_destroy( thread ); |
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291 | return -1; |
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292 | } |
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293 | |
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294 | // set trdid in thread descriptor |
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295 | thread->trdid = trdid; |
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296 | |
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297 | #if( DEBUG_THREAD_USER_CREATE & 1) |
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298 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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299 | printk("\n[%s] new thread %x registered in process %x\n", |
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300 | __FUNCTION__, trdid, pid ); |
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301 | #endif |
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302 | |
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303 | // allocate a stack from local VMM |
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304 | us_vseg = vmm_create_vseg( process, |
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305 | VSEG_TYPE_STACK, |
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306 | LTID_FROM_TRDID( trdid ), |
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307 | 0, // size unused |
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308 | 0, // file_offset unused |
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309 | 0, // file_size unused |
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310 | XPTR_NULL, // mapper_xp unused |
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311 | local_cxy ); |
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312 | |
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313 | if( us_vseg == NULL ) |
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314 | { |
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315 | printk("\n[ERROR] in %s : cannot create stack vseg\n", __FUNCTION__ ); |
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316 | process_remove_thread( thread ); |
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317 | thread_destroy( thread ); |
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318 | return -1; |
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319 | } |
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320 | |
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321 | #if( DEBUG_THREAD_USER_CREATE & 1) |
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322 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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323 | printk("\n[%s] stack vseg created / vpn_base %x / %d pages\n", |
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324 | __FUNCTION__, us_vseg->vpn_base, us_vseg->vpn_size ); |
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325 | #endif |
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326 | |
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327 | // initialize thread descriptor |
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328 | error = thread_init( thread, |
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329 | process, |
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330 | THREAD_USER, |
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331 | trdid, |
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332 | start_func, |
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333 | start_arg, |
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334 | core_lid, |
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335 | us_vseg ); |
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336 | if( error ) |
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337 | { |
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338 | printk("\n[ERROR] in %s : cannot initialize new thread\n", __FUNCTION__ ); |
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339 | vmm_remove_vseg( process , us_vseg ); |
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340 | process_remove_thread( thread ); |
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341 | thread_destroy( thread ); |
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342 | return -1; |
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343 | } |
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344 | |
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345 | #if( DEBUG_THREAD_USER_CREATE & 1) |
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346 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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347 | printk("\n[%s] new thread %x in process %x initialised\n", |
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348 | __FUNCTION__, thread->trdid, process->pid ); |
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349 | #endif |
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350 | |
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351 | // set DETACHED flag if required |
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352 | if( attr->attributes & PT_ATTR_DETACH ) |
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353 | { |
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354 | thread->flags |= THREAD_FLAG_DETACHED; |
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355 | } |
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356 | |
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357 | // allocate & initialize CPU context |
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358 | if( hal_cpu_context_alloc( thread ) ) |
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359 | { |
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360 | printk("\n[ERROR] in %s : cannot create CPU context\n", __FUNCTION__ ); |
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361 | vmm_remove_vseg( process , us_vseg ); |
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362 | process_remove_thread( thread ); |
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363 | thread_destroy( thread ); |
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364 | return -1; |
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365 | } |
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366 | hal_cpu_context_init( thread ); |
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367 | |
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368 | // allocate & initialize FPU context |
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369 | if( hal_fpu_context_alloc( thread ) ) |
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370 | { |
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371 | printk("\n[ERROR] in %s : cannot create FPU context\n", __FUNCTION__ ); |
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372 | vmm_remove_vseg( process , us_vseg ); |
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373 | process_remove_thread( thread ); |
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374 | thread_destroy( thread ); |
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375 | return -1; |
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376 | } |
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377 | hal_fpu_context_init( thread ); |
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378 | |
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379 | #if( DEBUG_THREAD_USER_CREATE & 1) |
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380 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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381 | printk("\n[%s] CPU & FPU contexts created\n", |
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382 | __FUNCTION__, thread->trdid ); |
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383 | hal_vmm_display( process , true ); |
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384 | #endif |
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385 | |
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386 | #if DEBUG_THREAD_USER_CREATE |
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387 | cycle = (uint32_t)hal_get_cycles(); |
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388 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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389 | printk("\n[%s] thread[%x,%x] exit / new_thread %x / core %d / cycle %d\n", |
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390 | __FUNCTION__, this->process->pid , this->trdid , thread->trdid, core_lid, cycle ); |
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391 | #endif |
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392 | |
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393 | *new_thread = thread; |
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394 | return 0; |
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395 | |
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396 | } // end thread_user_create() |
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397 | |
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398 | /////////////////////////////////////////////////////// |
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399 | error_t thread_user_fork( xptr_t parent_thread_xp, |
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400 | process_t * child_process, |
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401 | thread_t ** child_thread ) |
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402 | { |
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403 | error_t error; |
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404 | thread_t * child_ptr; // local pointer on child thread |
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405 | trdid_t child_trdid; // child thread identifier |
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406 | lid_t core_lid; // selected core local index |
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407 | thread_t * parent_ptr; // local pointer on remote parent thread |
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408 | cxy_t parent_cxy; // parent thread cluster |
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409 | process_t * parent_process; // local pointer on parent process |
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410 | xptr_t parent_gpt_xp; // extended pointer on parent thread GPT |
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411 | void * parent_func; // parent thread entry_func |
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412 | void * parent_args; // parent thread entry_args |
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413 | uint32_t parent_flags; // parent_thread flags |
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414 | vseg_t * parent_us_vseg; // parent thread user stack vseg |
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415 | vseg_t * child_us_vseg; // child thread user stack vseg |
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416 | |
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417 | #if DEBUG_THREAD_USER_FORK |
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418 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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419 | thread_t * this = CURRENT_THREAD; |
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420 | if( DEBUG_THREAD_USER_FORK < cycle ) |
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421 | printk("\n[%s] thread[%x,%x] enter for child_process %x / cycle %d\n", |
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422 | __FUNCTION__, this->process->pid, this->trdid, child_process->pid, cycle ); |
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423 | #endif |
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424 | |
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425 | // select a target core in local cluster |
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426 | core_lid = cluster_select_local_core(); |
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427 | |
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428 | #if (DEBUG_THREAD_USER_FORK & 1) |
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429 | if( DEBUG_THREAD_USER_FORK < cycle ) |
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430 | printk("\n[%s] thread[%x,%x] selected core [%x,%d]\n", |
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431 | __FUNCTION__, this->process->pid, this->trdid, local_cxy, core_lid ); |
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432 | #endif |
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433 | |
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434 | // get cluster and local pointer on parent thread descriptor |
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435 | parent_cxy = GET_CXY( parent_thread_xp ); |
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436 | parent_ptr = GET_PTR( parent_thread_xp ); |
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437 | |
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438 | // get relevant infos from parent thread |
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439 | parent_func = (void *) hal_remote_lpt( XPTR(parent_cxy,&parent_ptr->entry_func )); |
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440 | parent_args = (void *) hal_remote_lpt( XPTR(parent_cxy,&parent_ptr->entry_args )); |
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441 | parent_flags = (uint32_t)hal_remote_l32( XPTR(parent_cxy,&parent_ptr->flags )); |
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442 | parent_us_vseg = (vseg_t *)hal_remote_lpt( XPTR(parent_cxy,&parent_ptr->user_stack_vseg )); |
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443 | |
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444 | // get pointer on parent process in parent thread cluster |
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445 | parent_process = (process_t *)hal_remote_lpt( XPTR( parent_cxy, |
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446 | &parent_ptr->process ) ); |
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447 | |
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448 | // build extended pointer on parent GPT in parent thread cluster |
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449 | parent_gpt_xp = XPTR( parent_cxy , &parent_process->vmm.gpt ); |
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450 | |
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451 | #if (DEBUG_THREAD_USER_FORK & 1) |
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452 | if( DEBUG_THREAD_USER_FORK < cycle ) |
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453 | printk("\n[%s] thread[%x,%x] get parent GPT\n", |
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454 | __FUNCTION__, this->process->pid, this->trdid ); |
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455 | #endif |
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456 | |
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457 | // allocate memory for child thread descriptor |
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458 | child_ptr = thread_alloc(); |
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459 | |
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460 | if( child_ptr == NULL ) |
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461 | { |
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462 | printk("\n[ERROR] in %s : cannot allocate new thread\n", |
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463 | __FUNCTION__ ); |
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464 | return -1; |
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465 | } |
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466 | |
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467 | #if (DEBUG_THREAD_USER_FORK & 1) |
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468 | if( DEBUG_THREAD_USER_FORK < cycle ) |
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469 | printk("\n[%s] thread[%x,%x] allocated new thread descriptor %x\n", |
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470 | __FUNCTION__, this->process->pid, this->trdid, child_ptr ); |
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471 | #endif |
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472 | |
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473 | // set type in thread descriptor |
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474 | child_ptr->type = THREAD_USER; |
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475 | |
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476 | // register new thread in process descriptor, and get a TRDID |
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477 | error = process_register_thread( child_process, child_ptr , &child_trdid ); |
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478 | |
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479 | if( error ) |
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480 | { |
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481 | printk("\n[ERROR] in %s : cannot register new thread in process %x\n", |
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482 | __FUNCTION__, child_process->pid ); |
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483 | thread_destroy( child_ptr ); |
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484 | return -1; |
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485 | } |
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486 | |
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487 | // set trdid in thread descriptor |
---|
488 | child_ptr->trdid = child_trdid; |
---|
489 | |
---|
490 | #if (DEBUG_THREAD_USER_FORK & 1) |
---|
491 | if( DEBUG_THREAD_USER_FORK < cycle ) |
---|
492 | printk("\n[%s] thread[%x,%x] registered child thread %x in child process %x\n", |
---|
493 | __FUNCTION__, this->process->pid, this->trdid, child_trdid, child_process->pid ); |
---|
494 | #endif |
---|
495 | |
---|
496 | // get an user stack vseg from local VMM allocator |
---|
497 | child_us_vseg = vmm_create_vseg( child_process, |
---|
498 | VSEG_TYPE_STACK, |
---|
499 | LTID_FROM_TRDID( child_trdid ), |
---|
500 | 0, // size unused |
---|
501 | 0, // file_offset unused |
---|
502 | 0, // file_size unused |
---|
503 | XPTR_NULL, // mapper_xp unused |
---|
504 | local_cxy ); |
---|
505 | if( child_us_vseg == NULL ) |
---|
506 | { |
---|
507 | printk("\n[ERROR] in %s : cannot create stack vseg\n", __FUNCTION__ ); |
---|
508 | process_remove_thread( child_ptr ); |
---|
509 | thread_destroy( child_ptr ); |
---|
510 | return -1; |
---|
511 | } |
---|
512 | |
---|
513 | #if (DEBUG_THREAD_USER_FORK & 1) |
---|
514 | if( DEBUG_THREAD_USER_FORK < cycle ) |
---|
515 | printk("\n[%s] thread[%x,%x] created an user stack vseg / vpn_base %x / %d pages\n", |
---|
516 | __FUNCTION__, this->process->pid, this->trdid, |
---|
517 | child_us_vseg->vpn_base, child_us_vseg->vpn_size ); |
---|
518 | #endif |
---|
519 | |
---|
520 | // initialize thread descriptor |
---|
521 | error = thread_init( child_ptr, |
---|
522 | child_process, |
---|
523 | THREAD_USER, |
---|
524 | child_trdid, |
---|
525 | parent_func, |
---|
526 | parent_args, |
---|
527 | core_lid, |
---|
528 | child_us_vseg ); |
---|
529 | if( error ) |
---|
530 | { |
---|
531 | printk("\n[ERROR] in %s : cannot initialize child thread\n", __FUNCTION__ ); |
---|
532 | vmm_remove_vseg( child_process , child_us_vseg ); |
---|
533 | process_remove_thread( child_ptr ); |
---|
534 | thread_destroy( child_ptr ); |
---|
535 | return -1; |
---|
536 | } |
---|
537 | |
---|
538 | #if (DEBUG_THREAD_USER_FORK & 1) |
---|
539 | if( DEBUG_THREAD_USER_FORK < cycle ) |
---|
540 | printk("\n[%s] thread[%x,%x] initialised thread %x in process %x\n", |
---|
541 | __FUNCTION__, this->process->pid, this->trdid, child_ptr->trdid, child_process->pid ); |
---|
542 | #endif |
---|
543 | |
---|
544 | // set detached flag if required |
---|
545 | if( parent_flags & THREAD_FLAG_DETACHED ) child_ptr->flags = THREAD_FLAG_DETACHED; |
---|
546 | |
---|
547 | // allocate a CPU context for child thread |
---|
548 | if( hal_cpu_context_alloc( child_ptr ) ) |
---|
549 | { |
---|
550 | printk("\n[ERROR] in %s : cannot allocate CPU context\n", __FUNCTION__ ); |
---|
551 | vmm_remove_vseg( child_process , child_us_vseg ); |
---|
552 | process_remove_thread( child_ptr ); |
---|
553 | thread_destroy( child_ptr ); |
---|
554 | return -1; |
---|
555 | } |
---|
556 | |
---|
557 | // allocate a FPU context for child thread |
---|
558 | if( hal_fpu_context_alloc( child_ptr ) ) |
---|
559 | { |
---|
560 | printk("\n[ERROR] in %s : cannot allocate FPU context\n", __FUNCTION__ ); |
---|
561 | vmm_remove_vseg( child_process , child_us_vseg ); |
---|
562 | process_remove_thread( child_ptr ); |
---|
563 | thread_destroy( child_ptr ); |
---|
564 | return -1; |
---|
565 | } |
---|
566 | |
---|
567 | #if (DEBUG_THREAD_USER_FORK & 1) |
---|
568 | if( DEBUG_THREAD_USER_FORK < cycle ) |
---|
569 | printk("\n[%s] thread[%x,%x] created CPU & FPU contexts for thread %x in process %x\n", |
---|
570 | __FUNCTION__, this->process->pid, this->trdid, child_ptr->trdid, child_process->pid ); |
---|
571 | #endif |
---|
572 | |
---|
573 | // scan parent GPT, and copy all valid entries |
---|
574 | // associated to user stack vseg into child GPT |
---|
575 | vpn_t parent_vpn; |
---|
576 | vpn_t child_vpn; |
---|
577 | bool_t mapped; |
---|
578 | ppn_t ppn; |
---|
579 | vpn_t parent_vpn_base = hal_remote_l32( XPTR( parent_cxy, &parent_us_vseg->vpn_base ) ); |
---|
580 | vpn_t parent_vpn_size = hal_remote_l32( XPTR( parent_cxy, &parent_us_vseg->vpn_size ) ); |
---|
581 | vpn_t child_vpn_base = child_us_vseg->vpn_base; |
---|
582 | for( parent_vpn = parent_vpn_base , child_vpn = child_vpn_base ; |
---|
583 | parent_vpn < (parent_vpn_base + parent_vpn_size) ; |
---|
584 | parent_vpn++ , child_vpn++ ) |
---|
585 | { |
---|
586 | error = hal_gpt_pte_copy( &child_process->vmm.gpt, |
---|
587 | child_vpn, |
---|
588 | parent_gpt_xp, |
---|
589 | parent_vpn, |
---|
590 | true, // set cow |
---|
591 | &ppn, |
---|
592 | &mapped ); |
---|
593 | if( error ) |
---|
594 | { |
---|
595 | printk("\n[ERROR] in %s : cannot update child GPT\n", __FUNCTION__ ); |
---|
596 | vmm_remove_vseg( child_process , child_us_vseg ); |
---|
597 | process_remove_thread( child_ptr ); |
---|
598 | thread_destroy( child_ptr ); |
---|
599 | return -1; |
---|
600 | } |
---|
601 | |
---|
602 | // increment pending forks counter for a mapped page |
---|
603 | if( mapped ) |
---|
604 | { |
---|
605 | // get pointers on the page descriptor |
---|
606 | xptr_t page_xp = ppm_ppn2page( ppn ); |
---|
607 | cxy_t page_cxy = GET_CXY( page_xp ); |
---|
608 | page_t * page_ptr = GET_PTR( page_xp ); |
---|
609 | |
---|
610 | // build extended pointers on forks and lock fields |
---|
611 | xptr_t forks_xp = XPTR( page_cxy , &page_ptr->forks ); |
---|
612 | xptr_t lock_xp = XPTR( page_cxy , &page_ptr->lock ); |
---|
613 | |
---|
614 | // get lock protecting page |
---|
615 | remote_busylock_acquire( lock_xp ); |
---|
616 | |
---|
617 | // increment the forks counter in page descriptor |
---|
618 | hal_remote_atomic_add( forks_xp , 1 ); |
---|
619 | |
---|
620 | // release lock protecting page |
---|
621 | remote_busylock_release( lock_xp ); |
---|
622 | } |
---|
623 | } |
---|
624 | |
---|
625 | #if (DEBUG_THREAD_USER_FORK & 1) |
---|
626 | if( DEBUG_THREAD_USER_FORK < cycle ) |
---|
627 | printk("\n[%s] thread[%x,%x] copied all stack vseg PTEs to child GPT\n", |
---|
628 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
629 | #endif |
---|
630 | |
---|
631 | // set COW flag for all mapped entries of user stack vseg in parent GPT |
---|
632 | hal_gpt_set_cow( parent_gpt_xp, |
---|
633 | parent_vpn_base, |
---|
634 | parent_vpn_size ); |
---|
635 | |
---|
636 | #if (DEBUG_THREAD_USER_FORK & 1) |
---|
637 | if( DEBUG_THREAD_USER_FORK < cycle ) |
---|
638 | printk("\n[%s] thread[%x,%x] set the COW flag for stack vseg in parent GPT\n", |
---|
639 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
640 | #endif |
---|
641 | |
---|
642 | // return child pointer |
---|
643 | *child_thread = child_ptr; |
---|
644 | |
---|
645 | #if DEBUG_THREAD_USER_FORK |
---|
646 | cycle = (uint32_t)hal_get_cycles(); |
---|
647 | if( DEBUG_THREAD_USER_FORK < cycle ) |
---|
648 | printk("\n[%s] thread[%x,%x] exit / created thread[%x,%x] / cycle %d\n", |
---|
649 | __FUNCTION__, this->process->pid, this->trdid, |
---|
650 | child_ptr->process->pid, child_ptr->trdid, cycle ); |
---|
651 | #endif |
---|
652 | |
---|
653 | return 0; |
---|
654 | |
---|
655 | } // end thread_user_fork() |
---|
656 | |
---|
657 | //////////////////////////////////////////////// |
---|
658 | error_t thread_user_exec( void * entry_func, |
---|
659 | uint32_t argc, |
---|
660 | char ** argv ) |
---|
661 | { |
---|
662 | thread_t * thread = CURRENT_THREAD; |
---|
663 | process_t * process = thread->process; |
---|
664 | |
---|
665 | #if DEBUG_THREAD_USER_EXEC |
---|
666 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
667 | if( DEBUG_THREAD_USER_EXEC < cycle ) |
---|
668 | printk("\n[%s] thread[%x,%x] enter / cycle %d\n", |
---|
669 | __FUNCTION__, process->pid, thread->trdid, cycle ); |
---|
670 | #endif |
---|
671 | |
---|
672 | // check parent thread attributes |
---|
673 | assert( (thread->type == THREAD_USER ) , "bad type" ); |
---|
674 | assert( (thread->signature == THREAD_SIGNATURE) , "bad signature" ); |
---|
675 | assert( (thread->busylocks == 0) , "bad busylocks" ); |
---|
676 | |
---|
677 | // re-initialize various thread descriptor fields |
---|
678 | thread->quantum = 0; // TODO |
---|
679 | thread->ticks_nr = 0; // TODO |
---|
680 | thread->time_last_check = 0; // TODO |
---|
681 | |
---|
682 | thread->entry_func = entry_func; |
---|
683 | thread->main_argc = argc; |
---|
684 | thread->main_argv = argv; |
---|
685 | |
---|
686 | // the main thread is always detached |
---|
687 | thread->flags = THREAD_FLAG_DETACHED; |
---|
688 | thread->blocked = 0; |
---|
689 | thread->errno = 0; |
---|
690 | thread->fork_user = 0; // not inherited |
---|
691 | thread->fork_cxy = 0; // not inherited |
---|
692 | |
---|
693 | // re-initialize busylocks counters |
---|
694 | thread->busylocks = 0; |
---|
695 | |
---|
696 | // reset thread info |
---|
697 | memset( &thread->info , 0 , sizeof(thread_info_t) ); |
---|
698 | |
---|
699 | // re-initialize join_lock |
---|
700 | remote_busylock_init( XPTR( local_cxy , &thread->join_lock ), LOCK_THREAD_JOIN ); |
---|
701 | |
---|
702 | // allocate an user stack vseg for main thread |
---|
703 | vseg_t * us_vseg = vmm_create_vseg( process, |
---|
704 | VSEG_TYPE_STACK, |
---|
705 | LTID_FROM_TRDID( thread->trdid ), |
---|
706 | 0, // length unused |
---|
707 | 0, // file_offset unused |
---|
708 | 0, // file_size unused |
---|
709 | XPTR_NULL, // mapper_xp unused |
---|
710 | local_cxy ); |
---|
711 | if( us_vseg == NULL ) |
---|
712 | { |
---|
713 | printk("\n[ERROR] in %s : cannot create stack vseg for main thread\n", __FUNCTION__ ); |
---|
714 | return -1; |
---|
715 | } |
---|
716 | |
---|
717 | // update user stack in thread descriptor |
---|
718 | thread->user_stack_vseg = us_vseg; |
---|
719 | |
---|
720 | // release FPU ownership if required |
---|
721 | if( thread->core->fpu_owner == thread ) thread->core->fpu_owner = NULL; |
---|
722 | |
---|
723 | // re-initialize FPU context |
---|
724 | hal_fpu_context_init( thread ); |
---|
725 | |
---|
726 | #if DEBUG_THREAD_USER_EXEC |
---|
727 | cycle = (uint32_t)hal_get_cycles(); |
---|
728 | if( DEBUG_THREAD_USER_EXEC < cycle ) |
---|
729 | printk("\n[%s] thread[%x,%x] set CPU context & jump to user code / cycle %d\n", |
---|
730 | __FUNCTION__, process->pid, thread->trdid, cycle ); |
---|
731 | hal_vmm_display( process , true ); |
---|
732 | #endif |
---|
733 | |
---|
734 | // re-initialize CPU context... and jump to user code |
---|
735 | hal_cpu_context_exec( thread ); |
---|
736 | |
---|
737 | assert( false, "we should not execute this code"); |
---|
738 | |
---|
739 | return 0; |
---|
740 | |
---|
741 | } // end thread_user_exec() |
---|
742 | |
---|
743 | ///////////////////////////////////////////////////////// |
---|
744 | error_t thread_kernel_create( thread_t ** new_thread, |
---|
745 | thread_type_t type, |
---|
746 | void * func, |
---|
747 | void * args, |
---|
748 | lid_t core_lid ) |
---|
749 | { |
---|
750 | error_t error; |
---|
751 | thread_t * thread; // pointer on new thread descriptor |
---|
752 | trdid_t trdid; // new thread identifier |
---|
753 | |
---|
754 | thread_t * this = CURRENT_THREAD; |
---|
755 | |
---|
756 | assert( ( (type == THREAD_IDLE) || (type == THREAD_RPC) || (type == THREAD_DEV) ) , |
---|
757 | "illegal thread type" ); |
---|
758 | |
---|
759 | assert( (core_lid < LOCAL_CLUSTER->cores_nr) , |
---|
760 | "illegal core_lid" ); |
---|
761 | |
---|
762 | #if DEBUG_THREAD_KERNEL_CREATE |
---|
763 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
764 | if( DEBUG_THREAD_KERNEL_CREATE < cycle ) |
---|
765 | printk("\n[%s] thread[%x,%x] enter / requested_type %s / cycle %d\n", |
---|
766 | __FUNCTION__, this->process->pid, this->trdid, thread_type_str(type), cycle ); |
---|
767 | #endif |
---|
768 | |
---|
769 | // allocate memory for new thread descriptor |
---|
770 | thread = thread_alloc(); |
---|
771 | |
---|
772 | if( thread == NULL ) |
---|
773 | { |
---|
774 | printk("\n[ERROR] in %s : thread %x in process %x\n" |
---|
775 | " no memory for thread descriptor\n", |
---|
776 | __FUNCTION__, this->trdid, this->process->pid ); |
---|
777 | return ENOMEM; |
---|
778 | } |
---|
779 | |
---|
780 | // set type in thread descriptor |
---|
781 | thread->type = type; |
---|
782 | |
---|
783 | // register new thread in local kernel process descriptor, and get a TRDID |
---|
784 | error = process_register_thread( &process_zero , thread , &trdid ); |
---|
785 | |
---|
786 | if( error ) |
---|
787 | { |
---|
788 | printk("\n[ERROR] in %s : cannot register thread in kernel process\n", __FUNCTION__ ); |
---|
789 | return -1; |
---|
790 | } |
---|
791 | |
---|
792 | // set trdid in thread descriptor |
---|
793 | thread->trdid = trdid; |
---|
794 | |
---|
795 | // initialize thread descriptor |
---|
796 | error = thread_init( thread, |
---|
797 | &process_zero, |
---|
798 | type, |
---|
799 | trdid, |
---|
800 | func, |
---|
801 | args, |
---|
802 | core_lid, |
---|
803 | NULL ); // no user stack for a kernel thread |
---|
804 | |
---|
805 | if( error ) // release allocated memory for thread descriptor |
---|
806 | { |
---|
807 | printk("\n[ERROR] in %s : cannot initialize thread descriptor\n", __FUNCTION__ ); |
---|
808 | thread_destroy( thread ); |
---|
809 | return ENOMEM; |
---|
810 | } |
---|
811 | |
---|
812 | // allocate & initialize CPU context |
---|
813 | error = hal_cpu_context_alloc( thread ); |
---|
814 | |
---|
815 | if( error ) |
---|
816 | { |
---|
817 | printk("\n[ERROR] in %s : thread %x in process %x\n" |
---|
818 | " cannot create CPU context\n", |
---|
819 | __FUNCTION__, this->trdid, this->process->pid ); |
---|
820 | thread_destroy( thread ); |
---|
821 | return EINVAL; |
---|
822 | } |
---|
823 | |
---|
824 | hal_cpu_context_init( thread ); |
---|
825 | |
---|
826 | // set THREAD_BLOCKED_IDLE for DEV threads |
---|
827 | if( type == THREAD_DEV ) thread->blocked |= THREAD_BLOCKED_IDLE; |
---|
828 | |
---|
829 | #if DEBUG_THREAD_KERNEL_CREATE |
---|
830 | cycle = (uint32_t)hal_get_cycles(); |
---|
831 | if( DEBUG_THREAD_KERNEL_CREATE < cycle ) |
---|
832 | printk("\n[%s] thread[%x,%x] exit / new_thread %x / type %s / cycle %d\n", |
---|
833 | __FUNCTION__, this->process->pid, this->trdid, thread, thread_type_str(type), cycle ); |
---|
834 | #endif |
---|
835 | |
---|
836 | *new_thread = thread; |
---|
837 | return 0; |
---|
838 | |
---|
839 | } // end thread_kernel_create() |
---|
840 | |
---|
841 | ////////////////////////////////////////////// |
---|
842 | void thread_idle_init( thread_t * thread, |
---|
843 | thread_type_t type, |
---|
844 | void * func, |
---|
845 | void * args, |
---|
846 | lid_t core_lid ) |
---|
847 | { |
---|
848 | trdid_t trdid; |
---|
849 | error_t error; |
---|
850 | |
---|
851 | // check arguments |
---|
852 | assert( (type == THREAD_IDLE) , "illegal thread type" ); |
---|
853 | assert( (core_lid < LOCAL_CLUSTER->cores_nr) , "illegal core index" ); |
---|
854 | |
---|
855 | // set type in thread descriptor |
---|
856 | thread->type = THREAD_IDLE; |
---|
857 | |
---|
858 | // register idle thread in local kernel process descriptor, and get a TRDID |
---|
859 | error = process_register_thread( &process_zero , thread , &trdid ); |
---|
860 | |
---|
861 | assert( (error == 0), "cannot register idle_thread in kernel process" ); |
---|
862 | |
---|
863 | // set trdid in thread descriptor |
---|
864 | thread->trdid = trdid; |
---|
865 | |
---|
866 | // initialize thread descriptor |
---|
867 | error = thread_init( thread, |
---|
868 | &process_zero, |
---|
869 | THREAD_IDLE, |
---|
870 | trdid, |
---|
871 | func, |
---|
872 | args, |
---|
873 | core_lid, |
---|
874 | NULL ); // no user stack for a kernel thread |
---|
875 | |
---|
876 | assert( (error == 0), "cannot initialize idle_thread" ); |
---|
877 | |
---|
878 | // allocate & initialize CPU context if success |
---|
879 | error = hal_cpu_context_alloc( thread ); |
---|
880 | |
---|
881 | assert( (error == 0), "cannot allocate CPU context" ); |
---|
882 | |
---|
883 | hal_cpu_context_init( thread ); |
---|
884 | |
---|
885 | } // end thread_idle_init() |
---|
886 | |
---|
887 | //////////////////////////////////////////// |
---|
888 | uint32_t thread_destroy( thread_t * thread ) |
---|
889 | { |
---|
890 | reg_t save_sr; |
---|
891 | uint32_t count; |
---|
892 | |
---|
893 | thread_type_t type = thread->type; |
---|
894 | process_t * process = thread->process; |
---|
895 | core_t * core = thread->core; |
---|
896 | |
---|
897 | #if DEBUG_THREAD_DESTROY |
---|
898 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
899 | thread_t * this = CURRENT_THREAD; |
---|
900 | if( DEBUG_THREAD_DESTROY < cycle ) |
---|
901 | printk("\n[%s] thread[%x,%x] enter to destroy thread[%x,%x] / cycle %d\n", |
---|
902 | __FUNCTION__, this->process->pid, this->trdid, process->pid, thread->trdid, cycle ); |
---|
903 | #endif |
---|
904 | |
---|
905 | // check calling thread busylocks counter |
---|
906 | thread_assert_can_yield( thread , __FUNCTION__ ); |
---|
907 | |
---|
908 | // update target process instrumentation counter |
---|
909 | // process->vmm.pgfault_nr += thread->info.pgfault_nr; |
---|
910 | |
---|
911 | // remove thread from process th_tbl[] |
---|
912 | count = process_remove_thread( thread ); |
---|
913 | |
---|
914 | // release memory allocated for CPU context and FPU context if required |
---|
915 | hal_cpu_context_destroy( thread ); |
---|
916 | hal_fpu_context_destroy( thread ); |
---|
917 | |
---|
918 | // release user stack vseg (for an user thread only) |
---|
919 | if( type == THREAD_USER ) vmm_remove_vseg( process , thread->user_stack_vseg ); |
---|
920 | |
---|
921 | // release FPU ownership if required |
---|
922 | hal_disable_irq( &save_sr ); |
---|
923 | if( core->fpu_owner == thread ) |
---|
924 | { |
---|
925 | core->fpu_owner = NULL; |
---|
926 | hal_fpu_disable(); |
---|
927 | } |
---|
928 | hal_restore_irq( save_sr ); |
---|
929 | |
---|
930 | // invalidate thread descriptor |
---|
931 | thread->signature = 0; |
---|
932 | |
---|
933 | // release memory for thread descriptor (including kernel stack) |
---|
934 | kmem_req_t req; |
---|
935 | xptr_t base_xp = ppm_base2page( XPTR(local_cxy , thread ) ); |
---|
936 | |
---|
937 | req.type = KMEM_PAGE; |
---|
938 | req.ptr = GET_PTR( base_xp ); |
---|
939 | kmem_free( &req ); |
---|
940 | |
---|
941 | #if DEBUG_THREAD_DESTROY |
---|
942 | cycle = (uint32_t)hal_get_cycles(); |
---|
943 | if( DEBUG_THREAD_DESTROY < cycle ) |
---|
944 | printk("\n[%s] thread[%x,%x] exit / destroyed thread[%x,%x] / cycle %d\n", |
---|
945 | __FUNCTION__, this->process->pid, this->trdid, process->pid, thread->trdid, cycle ); |
---|
946 | #endif |
---|
947 | |
---|
948 | return count; |
---|
949 | |
---|
950 | } // end thread_destroy() |
---|
951 | |
---|
952 | ////////////////////////////////////////////////// |
---|
953 | inline void thread_set_req_ack( thread_t * target, |
---|
954 | uint32_t * rsp_count ) |
---|
955 | { |
---|
956 | reg_t save_sr; // for critical section |
---|
957 | |
---|
958 | // get pointer on target thread scheduler |
---|
959 | scheduler_t * sched = &target->core->scheduler; |
---|
960 | |
---|
961 | // wait scheduler ready to handle a new request |
---|
962 | while( sched->req_ack_pending ) asm volatile( "nop" ); |
---|
963 | |
---|
964 | // enter critical section |
---|
965 | hal_disable_irq( &save_sr ); |
---|
966 | |
---|
967 | // set request in target thread scheduler |
---|
968 | sched->req_ack_pending = true; |
---|
969 | |
---|
970 | // set ack request in target thread "flags" |
---|
971 | hal_atomic_or( &target->flags , THREAD_FLAG_REQ_ACK ); |
---|
972 | |
---|
973 | // set pointer on responses counter in target thread |
---|
974 | target->ack_rsp_count = rsp_count; |
---|
975 | |
---|
976 | // exit critical section |
---|
977 | hal_restore_irq( save_sr ); |
---|
978 | |
---|
979 | hal_fence(); |
---|
980 | |
---|
981 | } // thread_set_req_ack() |
---|
982 | |
---|
983 | ///////////////////////////////////////////////////// |
---|
984 | inline void thread_reset_req_ack( thread_t * target ) |
---|
985 | { |
---|
986 | reg_t save_sr; // for critical section |
---|
987 | |
---|
988 | // get pointer on target thread scheduler |
---|
989 | scheduler_t * sched = &target->core->scheduler; |
---|
990 | |
---|
991 | // check signal pending in scheduler |
---|
992 | assert( sched->req_ack_pending , "no pending signal" ); |
---|
993 | |
---|
994 | // enter critical section |
---|
995 | hal_disable_irq( &save_sr ); |
---|
996 | |
---|
997 | // reset signal in scheduler |
---|
998 | sched->req_ack_pending = false; |
---|
999 | |
---|
1000 | // reset signal in thread "flags" |
---|
1001 | hal_atomic_and( &target->flags , ~THREAD_FLAG_REQ_ACK ); |
---|
1002 | |
---|
1003 | // reset pointer on responses counter |
---|
1004 | target->ack_rsp_count = NULL; |
---|
1005 | |
---|
1006 | // exit critical section |
---|
1007 | hal_restore_irq( save_sr ); |
---|
1008 | |
---|
1009 | hal_fence(); |
---|
1010 | |
---|
1011 | } // thread_reset_req_ack() |
---|
1012 | |
---|
1013 | ////////////////////////////////////// |
---|
1014 | void thread_block( xptr_t thread_xp, |
---|
1015 | uint32_t cause ) |
---|
1016 | { |
---|
1017 | // get thread cluster and local pointer |
---|
1018 | cxy_t cxy = GET_CXY( thread_xp ); |
---|
1019 | thread_t * ptr = GET_PTR( thread_xp ); |
---|
1020 | |
---|
1021 | // set blocking cause |
---|
1022 | hal_remote_atomic_or( XPTR( cxy , &ptr->blocked ) , cause ); |
---|
1023 | hal_fence(); |
---|
1024 | |
---|
1025 | #if DEBUG_THREAD_BLOCK |
---|
1026 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1027 | process_t * process = hal_remote_lpt( XPTR( cxy , &ptr->process ) ); |
---|
1028 | thread_t * this = CURRENT_THREAD; |
---|
1029 | if( DEBUG_THREAD_BLOCK < cycle ) |
---|
1030 | printk("\n[%s] thread[%x,%x] blocked thread %x in process %x / cause %x\n", |
---|
1031 | __FUNCTION__, this->process->pid, this->trdid, |
---|
1032 | ptr->trdid, hal_remote_l32(XPTR( cxy , &process->pid )), cause ); |
---|
1033 | #endif |
---|
1034 | |
---|
1035 | } // end thread_block() |
---|
1036 | |
---|
1037 | //////////////////////////////////////////// |
---|
1038 | uint32_t thread_unblock( xptr_t thread_xp, |
---|
1039 | uint32_t cause ) |
---|
1040 | { |
---|
1041 | // get thread cluster and local pointer |
---|
1042 | cxy_t cxy = GET_CXY( thread_xp ); |
---|
1043 | thread_t * ptr = GET_PTR( thread_xp ); |
---|
1044 | |
---|
1045 | // reset blocking cause |
---|
1046 | uint32_t previous = hal_remote_atomic_and( XPTR( cxy , &ptr->blocked ) , ~cause ); |
---|
1047 | hal_fence(); |
---|
1048 | |
---|
1049 | #if DEBUG_THREAD_BLOCK |
---|
1050 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1051 | process_t * process = hal_remote_lpt( XPTR( cxy , &ptr->process ) ); |
---|
1052 | thread_t * this = CURRENT_THREAD; |
---|
1053 | if( DEBUG_THREAD_BLOCK < cycle ) |
---|
1054 | printk("\n[%s] thread[%x,%x] unblocked thread %x in process %x / cause %x\n", |
---|
1055 | __FUNCTION__, this->process->pid, this->trdid, |
---|
1056 | ptr->trdid, hal_remote_l32(XPTR( cxy , &process->pid )), cause ); |
---|
1057 | #endif |
---|
1058 | |
---|
1059 | // return a non zero value if the cause bit is modified |
---|
1060 | return( previous & cause ); |
---|
1061 | |
---|
1062 | } // end thread_unblock() |
---|
1063 | |
---|
1064 | ////////////////////////////////////// |
---|
1065 | void thread_delete( xptr_t target_xp, |
---|
1066 | pid_t pid, |
---|
1067 | bool_t is_forced ) |
---|
1068 | { |
---|
1069 | reg_t save_sr; // for critical section |
---|
1070 | bool_t target_join_done; // joining thread arrived first |
---|
1071 | bool_t target_attached; // target thread attached |
---|
1072 | xptr_t killer_xp; // extended pointer on killer thread (this) |
---|
1073 | thread_t * killer_ptr; // pointer on killer thread (this) |
---|
1074 | cxy_t target_cxy; // target thread cluster |
---|
1075 | thread_t * target_ptr; // pointer on target thread |
---|
1076 | process_t * target_process; // pointer on arget process |
---|
1077 | pid_t target_pid; // target process identifier |
---|
1078 | xptr_t target_flags_xp; // extended pointer on target thread <flags> |
---|
1079 | xptr_t target_join_lock_xp; // extended pointer on target thread <join_lock> |
---|
1080 | xptr_t target_join_xp_xp; // extended pointer on target thread <join_xp> |
---|
1081 | trdid_t target_trdid; // target thread identifier |
---|
1082 | ltid_t target_ltid; // target thread local index |
---|
1083 | xptr_t joining_xp; // extended pointer on joining thread |
---|
1084 | |
---|
1085 | // get target thread cluster and local pointer |
---|
1086 | target_cxy = GET_CXY( target_xp ); |
---|
1087 | target_ptr = GET_PTR( target_xp ); |
---|
1088 | |
---|
1089 | // get target thread identifier, attached flag, and process PID |
---|
1090 | target_trdid = hal_remote_l32( XPTR( target_cxy , &target_ptr->trdid ) ); |
---|
1091 | target_ltid = LTID_FROM_TRDID( target_trdid ); |
---|
1092 | target_flags_xp = XPTR( target_cxy , &target_ptr->flags ); |
---|
1093 | target_attached = ( (hal_remote_l32( target_flags_xp ) & THREAD_FLAG_DETACHED) == 0 ); |
---|
1094 | target_process = hal_remote_lpt( XPTR( target_cxy , &target_ptr->process ) ); |
---|
1095 | target_pid = hal_remote_l32( XPTR( target_cxy , &target_process->pid ) ); |
---|
1096 | |
---|
1097 | // check target PID |
---|
1098 | assert( (pid == target_pid), |
---|
1099 | "unconsistent pid and target_xp arguments" ); |
---|
1100 | |
---|
1101 | // get killer thread pointers |
---|
1102 | killer_ptr = CURRENT_THREAD; |
---|
1103 | killer_xp = XPTR( local_cxy , killer_ptr ); |
---|
1104 | |
---|
1105 | #if DEBUG_THREAD_DELETE |
---|
1106 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1107 | if( DEBUG_THREAD_DELETE < cycle ) |
---|
1108 | printk("\n[%s] killer[%x,%x] enters / target[%x,%x] / cycle %d\n", |
---|
1109 | __FUNCTION__, killer_ptr->process->pid, killer_ptr->trdid, |
---|
1110 | target_ptr->process->pid, target_ptr->trdid, cycle ); |
---|
1111 | #endif |
---|
1112 | |
---|
1113 | // check target thread is not the main thread, because the main thread |
---|
1114 | // must be deleted by the parent process sys_wait() function |
---|
1115 | assert( ((CXY_FROM_PID( pid ) != target_cxy) || (target_ltid != 0)), |
---|
1116 | "target thread cannot be the main thread" ); |
---|
1117 | |
---|
1118 | // check killer thread can yield |
---|
1119 | thread_assert_can_yield( killer_ptr , __FUNCTION__ ); |
---|
1120 | |
---|
1121 | // if the target thread is attached, we must synchonize with the joining thread |
---|
1122 | // before blocking and marking the target thead for delete. |
---|
1123 | |
---|
1124 | if( target_attached && (is_forced == false) ) // synchronize with joining thread |
---|
1125 | { |
---|
1126 | // build extended pointers on target thread join fields |
---|
1127 | target_join_lock_xp = XPTR( target_cxy , &target_ptr->join_lock ); |
---|
1128 | target_join_xp_xp = XPTR( target_cxy , &target_ptr->join_xp ); |
---|
1129 | |
---|
1130 | // enter critical section |
---|
1131 | hal_disable_irq( &save_sr ); |
---|
1132 | |
---|
1133 | // take the join_lock in target thread descriptor |
---|
1134 | remote_busylock_acquire( target_join_lock_xp ); |
---|
1135 | |
---|
1136 | // get join_done from target thread descriptor |
---|
1137 | target_join_done = ((hal_remote_l32( target_flags_xp ) & THREAD_FLAG_JOIN_DONE) != 0); |
---|
1138 | |
---|
1139 | if( target_join_done ) // joining thread arrived first |
---|
1140 | { |
---|
1141 | // get extended pointer on joining thread |
---|
1142 | joining_xp = (xptr_t)hal_remote_l64( target_join_xp_xp ); |
---|
1143 | |
---|
1144 | // reset the join_done flag in target thread |
---|
1145 | hal_remote_atomic_and( target_flags_xp , ~THREAD_FLAG_JOIN_DONE ); |
---|
1146 | |
---|
1147 | // unblock the joining thread |
---|
1148 | thread_unblock( joining_xp , THREAD_BLOCKED_JOIN ); |
---|
1149 | |
---|
1150 | // release the join_lock in target thread descriptor |
---|
1151 | remote_busylock_release( target_join_lock_xp ); |
---|
1152 | |
---|
1153 | // block the target thread |
---|
1154 | thread_block( target_xp , THREAD_BLOCKED_GLOBAL ); |
---|
1155 | |
---|
1156 | // set the REQ_DELETE flag in target thread descriptor |
---|
1157 | hal_remote_atomic_or( target_flags_xp , THREAD_FLAG_REQ_DELETE ); |
---|
1158 | |
---|
1159 | // exit critical section |
---|
1160 | hal_restore_irq( save_sr ); |
---|
1161 | |
---|
1162 | #if DEBUG_THREAD_DELETE |
---|
1163 | cycle = (uint32_t)hal_get_cycles; |
---|
1164 | if( DEBUG_THREAD_DELETE < cycle ) |
---|
1165 | printk("\n[%s] killer[%x,%x] exit / target[%x,%x] marked after join / cycle %d\n", |
---|
1166 | __FUNCTION__, killer_ptr->process->pid, killer_ptr->trdid, |
---|
1167 | target_ptr->process->pid, target_ptr->trdid, cycle ); |
---|
1168 | #endif |
---|
1169 | |
---|
1170 | } |
---|
1171 | else // killer thread arrived first |
---|
1172 | { |
---|
1173 | // set the kill_done flag in target thread |
---|
1174 | hal_remote_atomic_or( target_flags_xp , THREAD_FLAG_KILL_DONE ); |
---|
1175 | |
---|
1176 | // block this thread on BLOCKED_JOIN |
---|
1177 | thread_block( killer_xp , THREAD_BLOCKED_JOIN ); |
---|
1178 | |
---|
1179 | // set extended pointer on killer thread in target thread |
---|
1180 | hal_remote_s64( target_join_xp_xp , killer_xp ); |
---|
1181 | |
---|
1182 | // release the join_lock in target thread descriptor |
---|
1183 | remote_busylock_release( target_join_lock_xp ); |
---|
1184 | |
---|
1185 | #if DEBUG_THREAD_DELETE |
---|
1186 | cycle = (uint32_t)hal_get_cycles; |
---|
1187 | if( DEBUG_THREAD_DELETE < cycle ) |
---|
1188 | printk("\n[%s] killer[%x,%x] deschedules / target[%x,%x] not completed / cycle %d\n", |
---|
1189 | __FUNCTION__, killer_ptr->process->pid, killer_ptr->trdid, |
---|
1190 | target_ptr->process->pid, target_ptr->trdid, cycle ); |
---|
1191 | #endif |
---|
1192 | // deschedule |
---|
1193 | sched_yield( "killer thread wait joining thread" ); |
---|
1194 | |
---|
1195 | // block the target thread |
---|
1196 | thread_block( target_xp , THREAD_BLOCKED_GLOBAL ); |
---|
1197 | |
---|
1198 | // set the REQ_DELETE flag in target thread descriptor |
---|
1199 | hal_remote_atomic_or( target_flags_xp , THREAD_FLAG_REQ_DELETE ); |
---|
1200 | |
---|
1201 | // exit critical section |
---|
1202 | hal_restore_irq( save_sr ); |
---|
1203 | |
---|
1204 | #if DEBUG_THREAD_DELETE |
---|
1205 | cycle = (uint32_t)hal_get_cycles; |
---|
1206 | if( DEBUG_THREAD_DELETE < cycle ) |
---|
1207 | printk("\n[%s] killer[%x,%x] exit / target[%x,%x] marked after join / cycle %d\n", |
---|
1208 | __FUNCTION__, killer_ptr->process->pid, killer_ptr->trdid, |
---|
1209 | target_ptr->process->pid, target_ptr->trdid, cycle ); |
---|
1210 | #endif |
---|
1211 | |
---|
1212 | } |
---|
1213 | } |
---|
1214 | else // no synchronization with joining thread required |
---|
1215 | { |
---|
1216 | // block the target thread |
---|
1217 | thread_block( target_xp , THREAD_BLOCKED_GLOBAL ); |
---|
1218 | |
---|
1219 | // set the REQ_DELETE flag in target thread descriptor |
---|
1220 | hal_remote_atomic_or( target_flags_xp , THREAD_FLAG_REQ_DELETE ); |
---|
1221 | |
---|
1222 | #if DEBUG_THREAD_DELETE |
---|
1223 | cycle = (uint32_t)hal_get_cycles; |
---|
1224 | if( DEBUG_THREAD_DELETE < cycle ) |
---|
1225 | printk("\n[%s] killer[%x,%x] exit / target [%x,%x] marked / no join / cycle %d\n", |
---|
1226 | __FUNCTION__, killer_ptr->process->pid, killer_ptr->trdid, |
---|
1227 | target_ptr->process->pid, target_ptr->trdid, cycle ); |
---|
1228 | #endif |
---|
1229 | |
---|
1230 | } |
---|
1231 | } // end thread_delete() |
---|
1232 | |
---|
1233 | |
---|
1234 | |
---|
1235 | ///////////////////////////// |
---|
1236 | void thread_idle_func( void ) |
---|
1237 | { |
---|
1238 | |
---|
1239 | #if DEBUG_THREAD_IDLE |
---|
1240 | uint32_t cycle; |
---|
1241 | #endif |
---|
1242 | |
---|
1243 | while( 1 ) |
---|
1244 | { |
---|
1245 | // unmask IRQs |
---|
1246 | hal_enable_irq( NULL ); |
---|
1247 | |
---|
1248 | // force core to low-power mode (optional) |
---|
1249 | if( CONFIG_SCHED_IDLE_MODE_SLEEP ) |
---|
1250 | { |
---|
1251 | |
---|
1252 | #if DEBUG_THREAD_IDLE |
---|
1253 | cycle = (uint32_t)hal_get_cycles(); |
---|
1254 | if( DEBUG_THREAD_IDLE < cycle ) |
---|
1255 | printk("\n[%s] idle thread on core[%x,%d] goes to sleep / cycle %d\n", |
---|
1256 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, cycle ); |
---|
1257 | #endif |
---|
1258 | |
---|
1259 | hal_core_sleep(); |
---|
1260 | |
---|
1261 | #if DEBUG_THREAD_IDLE |
---|
1262 | cycle = (uint32_t)hal_get_cycles(); |
---|
1263 | if( DEBUG_THREAD_IDLE < cycle ) |
---|
1264 | printk("\n[%s] idle thread on core[%x,%d] wake up / cycle %d\n", |
---|
1265 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, cycle ); |
---|
1266 | #endif |
---|
1267 | |
---|
1268 | } |
---|
1269 | |
---|
1270 | #if DEBUG_THREAD_IDLE |
---|
1271 | cycle = (uint32_t)hal_get_cycles(); |
---|
1272 | if( DEBUG_THREAD_IDLE < cycle ) |
---|
1273 | sched_display( CURRENT_THREAD->core->lid ); |
---|
1274 | #endif |
---|
1275 | // search a runable thread |
---|
1276 | sched_yield( "running idle thread" ); |
---|
1277 | |
---|
1278 | } // end while |
---|
1279 | |
---|
1280 | } // end thread_idle() |
---|
1281 | |
---|
1282 | |
---|
1283 | /////////////////////////////////////////// |
---|
1284 | void thread_time_update( thread_t * thread, |
---|
1285 | bool_t is_user ) |
---|
1286 | { |
---|
1287 | cycle_t current_cycle; // current cycle counter value |
---|
1288 | cycle_t last_cycle; // last cycle counter value |
---|
1289 | |
---|
1290 | // get pointer on thread_info structure |
---|
1291 | thread_info_t * info = &thread->info; |
---|
1292 | |
---|
1293 | // get last cycle counter value |
---|
1294 | last_cycle = info->last_cycle; |
---|
1295 | |
---|
1296 | // get current cycle counter value |
---|
1297 | current_cycle = hal_get_cycles(); |
---|
1298 | |
---|
1299 | // update thread_info structure |
---|
1300 | info->last_cycle = current_cycle; |
---|
1301 | |
---|
1302 | // update time in thread_info |
---|
1303 | if( is_user ) info->usr_cycles += (current_cycle - last_cycle); |
---|
1304 | else info->sys_cycles += (current_cycle - last_cycle); |
---|
1305 | |
---|
1306 | } // end thread_time_update() |
---|
1307 | |
---|
1308 | ///////////////////////////////////// |
---|
1309 | xptr_t thread_get_xptr( pid_t pid, |
---|
1310 | trdid_t trdid ) |
---|
1311 | { |
---|
1312 | cxy_t target_cxy; // target thread cluster identifier |
---|
1313 | ltid_t target_thread_ltid; // target thread local index |
---|
1314 | thread_t * target_thread_ptr; // target thread local pointer |
---|
1315 | xptr_t target_process_xp; // extended pointer on target process descriptor |
---|
1316 | process_t * target_process_ptr; // local pointer on target process descriptor |
---|
1317 | pid_t target_process_pid; // target process identifier |
---|
1318 | xlist_entry_t root; // root of list of process in target cluster |
---|
1319 | xptr_t lock_xp; // extended pointer on lock protecting this list |
---|
1320 | |
---|
1321 | #if DEBUG_THREAD_GET_XPTR |
---|
1322 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1323 | thread_t * this = CURRENT_THREAD; |
---|
1324 | if( DEBUG_THREAD_GET_XPTR < cycle ) |
---|
1325 | printk("\n[%s] thread %x in process %x enters / pid %x / trdid %x / cycle %d\n", |
---|
1326 | __FUNCTION__, this->trdid, this->process->pid, pid, trdid, cycle ); |
---|
1327 | #endif |
---|
1328 | |
---|
1329 | // get target cluster identifier and local thread identifier |
---|
1330 | target_cxy = CXY_FROM_TRDID( trdid ); |
---|
1331 | target_thread_ltid = LTID_FROM_TRDID( trdid ); |
---|
1332 | |
---|
1333 | // check trdid argument |
---|
1334 | if( (target_thread_ltid >= CONFIG_THREADS_MAX_PER_CLUSTER) || |
---|
1335 | cluster_is_undefined( target_cxy ) ) return XPTR_NULL; |
---|
1336 | |
---|
1337 | // get root of list of process descriptors in target cluster |
---|
1338 | hal_remote_memcpy( XPTR( local_cxy , &root ), |
---|
1339 | XPTR( target_cxy , &LOCAL_CLUSTER->pmgr.local_root ), |
---|
1340 | sizeof(xlist_entry_t) ); |
---|
1341 | |
---|
1342 | // get extended pointer on lock protecting the list of local processes |
---|
1343 | lock_xp = XPTR( target_cxy , &LOCAL_CLUSTER->pmgr.local_lock ); |
---|
1344 | |
---|
1345 | // take the lock protecting the list of processes in target cluster |
---|
1346 | remote_queuelock_acquire( lock_xp ); |
---|
1347 | |
---|
1348 | #if( DEBUG_THREAD_GET_XPTR & 1 ) |
---|
1349 | if( DEBUG_THREAD_GET_XPTR < cycle ) |
---|
1350 | printk("\n[%s] scan processes in cluster %x :\n", __FUNCTION__, target_cxy ); |
---|
1351 | #endif |
---|
1352 | |
---|
1353 | // scan the list of local processes in target cluster |
---|
1354 | xptr_t iter; |
---|
1355 | bool_t found = false; |
---|
1356 | XLIST_FOREACH( XPTR( target_cxy , &LOCAL_CLUSTER->pmgr.local_root ) , iter ) |
---|
1357 | { |
---|
1358 | target_process_xp = XLIST_ELEMENT( iter , process_t , local_list ); |
---|
1359 | target_process_ptr = GET_PTR( target_process_xp ); |
---|
1360 | target_process_pid = hal_remote_l32( XPTR( target_cxy , &target_process_ptr->pid ) ); |
---|
1361 | |
---|
1362 | #if( DEBUG_THREAD_GET_XPTR & 1 ) |
---|
1363 | if( DEBUG_THREAD_GET_XPTR < cycle ) |
---|
1364 | printk(" - process %x\n", target_process_pid ); |
---|
1365 | #endif |
---|
1366 | |
---|
1367 | if( target_process_pid == pid ) |
---|
1368 | { |
---|
1369 | found = true; |
---|
1370 | break; |
---|
1371 | } |
---|
1372 | } |
---|
1373 | |
---|
1374 | // release the lock protecting the list of processes in target cluster |
---|
1375 | remote_queuelock_release( lock_xp ); |
---|
1376 | |
---|
1377 | // check PID found |
---|
1378 | if( found == false ) |
---|
1379 | { |
---|
1380 | |
---|
1381 | #if( DEBUG_THREAD_GET_XPTR & 1 ) |
---|
1382 | if( DEBUG_THREAD_GET_XPTR < cycle ) |
---|
1383 | printk("\n[%s] pid %x not found in cluster %x\n", |
---|
1384 | __FUNCTION__, pid, target_cxy ); |
---|
1385 | #endif |
---|
1386 | return XPTR_NULL; |
---|
1387 | } |
---|
1388 | |
---|
1389 | // get target thread local pointer |
---|
1390 | xptr_t xp = XPTR( target_cxy , &target_process_ptr->th_tbl[target_thread_ltid] ); |
---|
1391 | target_thread_ptr = (thread_t *)hal_remote_lpt( xp ); |
---|
1392 | |
---|
1393 | if( target_thread_ptr == NULL ) |
---|
1394 | { |
---|
1395 | |
---|
1396 | #if( DEBUG_THREAD_GET_XPTR & 1 ) |
---|
1397 | if( DEBUG_THREAD_GET_XPTR < cycle ) |
---|
1398 | printk("\n[%s] thread %x not registered in process %x in cluster %x\n", |
---|
1399 | __FUNCTION__, trdid, pid, target_cxy ); |
---|
1400 | #endif |
---|
1401 | return XPTR_NULL; |
---|
1402 | } |
---|
1403 | |
---|
1404 | #if DEBUG_THREAD_GET_XPTR |
---|
1405 | cycle = (uint32_t)hal_get_cycles(); |
---|
1406 | if( DEBUG_THREAD_GET_XPTR < cycle ) |
---|
1407 | printk("\n[%s] thread %x in process %x exit / pid %x / trdid %x / cycle %d\n", |
---|
1408 | __FUNCTION__, this->trdid, this->process->pid, pid, trdid, cycle ); |
---|
1409 | #endif |
---|
1410 | |
---|
1411 | return XPTR( target_cxy , target_thread_ptr ); |
---|
1412 | |
---|
1413 | } // end thread_get_xptr() |
---|
1414 | |
---|
1415 | /////////////////////////////////////////////////// |
---|
1416 | void thread_assert_can_yield( thread_t * thread, |
---|
1417 | const char * func_str ) |
---|
1418 | { |
---|
1419 | // does nothing if thread does not hold any busylock |
---|
1420 | |
---|
1421 | if( thread->busylocks ) |
---|
1422 | { |
---|
1423 | // get pointers on TXT0 chdev |
---|
1424 | xptr_t txt0_xp = chdev_dir.txt_tx[0]; |
---|
1425 | cxy_t txt0_cxy = GET_CXY( txt0_xp ); |
---|
1426 | chdev_t * txt0_ptr = GET_PTR( txt0_xp ); |
---|
1427 | |
---|
1428 | // get extended pointer on TXT0 lock |
---|
1429 | xptr_t txt0_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
---|
1430 | |
---|
1431 | // get TXT0 lock |
---|
1432 | remote_busylock_acquire( txt0_lock_xp ); |
---|
1433 | |
---|
1434 | // display error message on TXT0 |
---|
1435 | nolock_printk("\n[PANIC] in %s / thread[%x,%x] cannot yield : " |
---|
1436 | "hold %d busylock(s) / cycle %d\n", |
---|
1437 | func_str, thread->process->pid, thread->trdid, |
---|
1438 | thread->busylocks - 1, (uint32_t)hal_get_cycles() ); |
---|
1439 | |
---|
1440 | #if DEBUG_BUSYLOCK |
---|
1441 | |
---|
1442 | // scan list of busylocks |
---|
1443 | xptr_t iter_xp; |
---|
1444 | xptr_t root_xp = XPTR( local_cxy , &thread->busylocks_root ); |
---|
1445 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
1446 | { |
---|
1447 | xptr_t lock_xp = XLIST_ELEMENT( iter_xp , busylock_t , xlist ); |
---|
1448 | cxy_t lock_cxy = GET_CXY( lock_xp ); |
---|
1449 | busylock_t * lock_ptr = GET_PTR( lock_xp ); |
---|
1450 | uint32_t lock_type = hal_remote_l32( XPTR( lock_cxy , &lock_ptr->type ) ); |
---|
1451 | nolock_printk(" - %s in cluster %x\n", lock_type_str[lock_type] , lock_cxy ); |
---|
1452 | } |
---|
1453 | |
---|
1454 | #endif |
---|
1455 | |
---|
1456 | // release TXT0 lock |
---|
1457 | remote_busylock_release( txt0_lock_xp ); |
---|
1458 | |
---|
1459 | // suicide |
---|
1460 | hal_core_sleep(); |
---|
1461 | } |
---|
1462 | } // end thread_assert_can yield() |
---|
1463 | |
---|
1464 | ////////////////////////////////////////////////////// |
---|
1465 | void thread_display_busylocks( xptr_t thread_xp, |
---|
1466 | const char * string ) |
---|
1467 | { |
---|
1468 | |
---|
1469 | cxy_t thread_cxy = GET_CXY( thread_xp ); |
---|
1470 | thread_t * thread_ptr = GET_PTR( thread_xp ); |
---|
1471 | |
---|
1472 | #if DEBUG_BUSYLOCK |
---|
1473 | |
---|
1474 | xptr_t iter_xp; |
---|
1475 | |
---|
1476 | // get relevant info from target thread descriptor |
---|
1477 | uint32_t locks = hal_remote_l32( XPTR( thread_cxy , &thread_ptr->busylocks ) ); |
---|
1478 | trdid_t trdid = hal_remote_l32( XPTR( thread_cxy , &thread_ptr->trdid ) ); |
---|
1479 | process_t * process = hal_remote_lpt( XPTR( thread_cxy , &thread_ptr->process ) ); |
---|
1480 | pid_t pid = hal_remote_l32( XPTR( thread_cxy , &process->pid ) ); |
---|
1481 | |
---|
1482 | // get extended pointer on root of busylocks |
---|
1483 | xptr_t root_xp = XPTR( thread_cxy , &thread_ptr->busylocks_root ); |
---|
1484 | |
---|
1485 | // get pointers on TXT0 chdev |
---|
1486 | xptr_t txt0_xp = chdev_dir.txt_tx[0]; |
---|
1487 | cxy_t txt0_cxy = GET_CXY( txt0_xp ); |
---|
1488 | chdev_t * txt0_ptr = GET_PTR( txt0_xp ); |
---|
1489 | |
---|
1490 | // get extended pointer on remote TXT0 lock |
---|
1491 | xptr_t txt0_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
---|
1492 | |
---|
1493 | // get TXT0 lock |
---|
1494 | remote_busylock_acquire( txt0_lock_xp ); |
---|
1495 | |
---|
1496 | // display header |
---|
1497 | nolock_printk("\n***** thread[%x,%x] in <%s> : %d busylocks *****\n", |
---|
1498 | pid, trdid, string, locks ); |
---|
1499 | |
---|
1500 | // scan the xlist of busylocks when required |
---|
1501 | if( locks ) |
---|
1502 | { |
---|
1503 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
1504 | { |
---|
1505 | xptr_t lock_xp = XLIST_ELEMENT( iter_xp , busylock_t , xlist ); |
---|
1506 | cxy_t lock_cxy = GET_CXY( lock_xp ); |
---|
1507 | busylock_t * lock_ptr = GET_PTR( lock_xp ); |
---|
1508 | uint32_t lock_type = hal_remote_l32(XPTR( lock_cxy , &lock_ptr->type )); |
---|
1509 | nolock_printk(" - %s in cluster %x\n", lock_type_str[lock_type] , lock_cxy ); |
---|
1510 | } |
---|
1511 | } |
---|
1512 | |
---|
1513 | // release TXT0 lock |
---|
1514 | remote_busylock_release( txt0_lock_xp ); |
---|
1515 | |
---|
1516 | #else |
---|
1517 | |
---|
1518 | printk("\n[ERROR] in %s : set DEBUG_BUSYLOCK in kernel_config.h for %s / thread(%x,%x)\n", |
---|
1519 | __FUNCTION__, string, thread_cxy, thread_ptr ); |
---|
1520 | |
---|
1521 | #endif |
---|
1522 | |
---|
1523 | return; |
---|
1524 | |
---|
1525 | } // end thread_display_busylock() |
---|
1526 | |
---|