1 | /* |
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2 | * process.c - process related management |
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3 | * |
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4 | * Authors Ghassan Almaless (2008,2009,2010,2011,2012) |
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5 | * Mohamed Lamine Karaoui (2015) |
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6 | * Alain Greiner (2016,2017) |
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7 | * |
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8 | * Copyright (c) UPMC Sorbonne Universites |
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9 | * |
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10 | * This file is part of ALMOS-MKH. |
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11 | * |
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12 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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13 | * under the terms of the GNU General Public License as published by |
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14 | * the Free Software Foundation; version 2.0 of the License. |
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15 | * |
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16 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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19 | * General Public License for more details. |
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20 | * |
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21 | * You should have received a copy of the GNU General Public License |
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22 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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23 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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24 | */ |
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25 | |
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26 | #include <kernel_config.h> |
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27 | #include <hal_types.h> |
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28 | #include <hal_remote.h> |
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29 | #include <hal_uspace.h> |
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30 | #include <hal_irqmask.h> |
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31 | #include <errno.h> |
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32 | #include <printk.h> |
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33 | #include <memcpy.h> |
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34 | #include <bits.h> |
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35 | #include <kmem.h> |
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36 | #include <page.h> |
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37 | #include <vmm.h> |
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38 | #include <vfs.h> |
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39 | #include <core.h> |
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40 | #include <thread.h> |
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41 | #include <chdev.h> |
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42 | #include <list.h> |
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43 | #include <string.h> |
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44 | #include <scheduler.h> |
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45 | #include <remote_spinlock.h> |
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46 | #include <dqdt.h> |
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47 | #include <cluster.h> |
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48 | #include <ppm.h> |
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49 | #include <boot_info.h> |
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50 | #include <process.h> |
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51 | #include <elf.h> |
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52 | #include <syscalls.h> |
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53 | #include <signal.h> |
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54 | |
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55 | ////////////////////////////////////////////////////////////////////////////////////////// |
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56 | // Extern global variables |
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57 | ////////////////////////////////////////////////////////////////////////////////////////// |
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58 | |
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59 | extern process_t process_zero; // allocated in kernel_init.c |
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60 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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61 | |
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62 | ////////////////////////////////////////////////////////////////////////////////////////// |
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63 | // Process initialisation related functions |
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64 | ////////////////////////////////////////////////////////////////////////////////////////// |
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65 | |
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66 | /////////////////////////// |
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67 | process_t * process_alloc() |
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68 | { |
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69 | kmem_req_t req; |
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70 | |
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71 | req.type = KMEM_PROCESS; |
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72 | req.size = sizeof(process_t); |
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73 | req.flags = AF_KERNEL; |
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74 | |
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75 | return (process_t *)kmem_alloc( &req ); |
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76 | } |
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77 | |
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78 | //////////////////////////////////////// |
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79 | void process_free( process_t * process ) |
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80 | { |
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81 | kmem_req_t req; |
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82 | |
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83 | req.type = KMEM_PROCESS; |
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84 | req.ptr = process; |
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85 | kmem_free( &req ); |
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86 | } |
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87 | |
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88 | ///////////////////////////////////////////////// |
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89 | void process_reference_init( process_t * process, |
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90 | pid_t pid, |
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91 | xptr_t parent_xp, |
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92 | xptr_t model_xp ) |
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93 | { |
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94 | cxy_t parent_cxy; |
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95 | process_t * parent_ptr; |
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96 | cxy_t model_cxy; |
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97 | process_t * model_ptr; |
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98 | xptr_t stdin_xp; |
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99 | xptr_t stdout_xp; |
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100 | xptr_t stderr_xp; |
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101 | uint32_t stdin_id; |
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102 | uint32_t stdout_id; |
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103 | uint32_t stderr_id; |
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104 | error_t error; |
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105 | uint32_t txt_id; |
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106 | char rx_path[40]; |
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107 | char tx_path[40]; |
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108 | xptr_t chdev_xp; |
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109 | chdev_t * chdev_ptr; |
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110 | cxy_t chdev_cxy; |
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111 | pid_t model_pid; |
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112 | pid_t parent_pid; |
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113 | |
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114 | // get model process cluster and local pointer |
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115 | model_cxy = GET_CXY( model_xp ); |
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116 | model_ptr = (process_t *)GET_PTR( model_xp ); |
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117 | |
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118 | // get parent process cluster and local pointer |
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119 | parent_cxy = GET_CXY( parent_xp ); |
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120 | parent_ptr = (process_t *)GET_PTR( parent_xp ); |
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121 | |
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122 | // get model_pid and parent_pid |
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123 | parent_pid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
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124 | model_pid = hal_remote_lw( XPTR( model_cxy , &model_ptr->pid ) ); |
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125 | |
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126 | process_dmsg("\n[DBG] %s : core[%x,%d] enters / pid = %x / ppid = %x / model_pid = %x\n", |
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127 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , pid , parent_pid , model_pid ); |
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128 | |
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129 | // initialize PID, REF_XP, PARENT_XP, and STATE |
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130 | process->pid = pid; |
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131 | process->ref_xp = XPTR( local_cxy , process ); |
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132 | process->parent_xp = parent_xp; |
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133 | process->state = PROCESS_STATE_RUNNING; |
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134 | |
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135 | // initialize vmm as empty |
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136 | error = vmm_init( process ); |
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137 | assert( (error == 0) , __FUNCTION__ , "cannot initialize VMM\n" ); |
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138 | |
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139 | process_dmsg("\n[DBG] %s : core[%x,%d] / vmm inialised as empty for process %x\n", |
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140 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , pid ); |
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141 | |
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142 | // initialize fd_array as empty |
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143 | process_fd_init( process ); |
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144 | |
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145 | // define the stdin/stdout/stderr pseudo files <=> select a TXT terminal. |
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146 | // - if INIT (pid == 1) => link to kernel TXT[0] |
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147 | // - if KSH[i] (model_pid == 1) => allocate a free TXT[i] |
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148 | // - if USER process => same terminal as model |
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149 | |
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150 | if( (pid == 1) || (model_pid == 1)) // INIT or KSH process |
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151 | { |
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152 | if (pid == 1 ) txt_id = 0; // INIT |
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153 | else txt_id = process_txt_alloc(); // KSH[i] |
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154 | |
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155 | // attach process to TXT[txt_id] |
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156 | process_txt_attach( process , txt_id ); |
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157 | |
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158 | // build path to TXT_RX[i] and TXT_TX[i] chdevs |
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159 | snprintf( rx_path , 40 , "/dev/external/txt%d_rx", txt_id ); |
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160 | snprintf( tx_path , 40 , "/dev/external/txt%d_tx", txt_id ); |
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161 | |
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162 | // create stdin pseudo file |
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163 | error = vfs_open( process, |
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164 | rx_path, |
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165 | O_RDONLY, |
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166 | 0, // FIXME chmod |
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167 | &stdin_xp, |
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168 | &stdin_id ); |
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169 | |
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170 | assert( (error == 0) , __FUNCTION__ , "cannot open stdin pseudo file" ); |
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171 | assert( (stdin_id == 0) , __FUNCTION__ , "stdin index must be 0" ); |
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172 | |
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173 | // create stdout pseudo file |
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174 | error = vfs_open( process, |
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175 | tx_path, |
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176 | O_WRONLY, |
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177 | 0, // FIXME chmod |
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178 | &stdout_xp, |
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179 | &stdout_id ); |
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180 | |
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181 | assert( (error == 0) , __FUNCTION__ , "cannot open stdout pseudo file" ); |
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182 | assert( (stdout_id == 1) , __FUNCTION__ , "stdout index must be 1" ); |
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183 | |
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184 | // create stderr pseudo file |
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185 | error = vfs_open( process, |
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186 | tx_path, |
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187 | O_WRONLY, |
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188 | 0, // FIXME chmod |
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189 | &stderr_xp, |
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190 | &stderr_id ); |
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191 | |
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192 | assert( (error == 0) , __FUNCTION__ , "cannot open stderr pseudo file" ); |
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193 | assert( (stderr_id == 2) , __FUNCTION__ , "stderr index must be 2" ); |
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194 | |
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195 | } |
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196 | else // normal user process |
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197 | { |
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198 | // get extended pointer on model process TXT chdev |
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199 | chdev_xp = chdev_from_file( model_ptr->fd_array.array[0] ); |
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200 | |
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201 | // get cluster and local pointer on chdev |
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202 | chdev_cxy = GET_CXY( chdev_xp ); |
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203 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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204 | |
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205 | // get TXT terminal index |
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206 | txt_id = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->channel ) ); |
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207 | |
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208 | // attach process to TXT[txt_id] |
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209 | process_txt_attach( process , txt_id ); |
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210 | |
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211 | // copy all open files from model process fd_array to this process |
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212 | process_fd_remote_copy( XPTR( local_cxy , &process->fd_array ), |
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213 | XPTR( model_cxy , &model_ptr->fd_array ) ); |
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214 | } |
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215 | |
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216 | // initialize specific inodes root and cwd |
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217 | process->vfs_root_xp = (xptr_t)hal_remote_lwd( XPTR( model_cxy, |
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218 | &model_ptr->vfs_root_xp ) ); |
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219 | process->vfs_cwd_xp = (xptr_t)hal_remote_lwd( XPTR( model_cxy, |
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220 | &model_ptr->vfs_cwd_xp ) ); |
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221 | vfs_inode_remote_up( process->vfs_root_xp ); |
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222 | vfs_inode_remote_up( process->vfs_cwd_xp ); |
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223 | |
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224 | remote_rwlock_init( XPTR( local_cxy , &process->cwd_lock ) ); |
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225 | |
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226 | process_dmsg("\n[DBG] %s : core[%x,%d] / fd array initialised for process %x\n", |
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227 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , pid ); |
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228 | |
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229 | // reset children list root |
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230 | xlist_root_init( XPTR( local_cxy , &process->children_root ) ); |
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231 | process->children_nr = 0; |
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232 | remote_spinlock_init( XPTR( local_cxy , &process->children_lock ) ); |
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233 | |
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234 | // reset semaphore / mutex / barrier / condvar list roots |
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235 | xlist_root_init( XPTR( local_cxy , &process->sem_root ) ); |
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236 | xlist_root_init( XPTR( local_cxy , &process->mutex_root ) ); |
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237 | xlist_root_init( XPTR( local_cxy , &process->barrier_root ) ); |
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238 | xlist_root_init( XPTR( local_cxy , &process->condvar_root ) ); |
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239 | remote_spinlock_init( XPTR( local_cxy , &process->sync_lock ) ); |
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240 | |
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241 | // register new process in the local cluster manager pref_tbl[] |
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242 | lpid_t lpid = LPID_FROM_PID( pid ); |
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243 | LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process ); |
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244 | |
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245 | // register new process descriptor in local cluster manager local_list |
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246 | cluster_process_local_link( process ); |
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247 | |
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248 | // register new process descriptor in local cluster manager copies_list |
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249 | cluster_process_copies_link( process ); |
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250 | |
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251 | // reset th_tbl[] array as empty in process descriptor |
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252 | uint32_t i; |
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253 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
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254 | { |
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255 | process->th_tbl[i] = NULL; |
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256 | } |
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257 | process->th_nr = 0; |
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258 | spinlock_init( &process->th_lock ); |
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259 | |
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260 | hal_fence(); |
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261 | |
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262 | process_dmsg("\n[DBG] %s : core[%x,%d] exit for process %x\n", |
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263 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , pid ); |
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264 | |
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265 | } // process_reference_init() |
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266 | |
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267 | ///////////////////////////////////////////////////// |
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268 | error_t process_copy_init( process_t * local_process, |
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269 | xptr_t reference_process_xp ) |
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270 | { |
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271 | error_t error; |
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272 | |
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273 | // get reference process cluster and local pointer |
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274 | cxy_t ref_cxy = GET_CXY( reference_process_xp ); |
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275 | process_t * ref_ptr = (process_t *)GET_PTR( reference_process_xp ); |
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276 | |
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277 | // initialize PID, REF_XP, PARENT_XP, and STATE |
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278 | local_process->pid = hal_remote_lw( XPTR( ref_cxy , &ref_ptr->pid ) ); |
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279 | local_process->parent_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->parent_xp ) ); |
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280 | local_process->ref_xp = reference_process_xp; |
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281 | local_process->state = PROCESS_STATE_RUNNING; |
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282 | |
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283 | process_dmsg("\n[DBG] %s : core[%x,%d] enters for process %x\n", |
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284 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , local_process->pid ); |
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285 | |
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286 | // reset local process vmm |
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287 | error = vmm_init( local_process ); |
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288 | assert( (error == 0) , __FUNCTION__ , "cannot initialize VMM\n"); |
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289 | |
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290 | // reset process file descriptors array |
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291 | process_fd_init( local_process ); |
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292 | |
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293 | // reset vfs_root_xp / vfs_bin_xp / vfs_cwd_xp fields |
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294 | local_process->vfs_root_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) ); |
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295 | local_process->vfs_bin_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) ); |
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296 | local_process->vfs_cwd_xp = XPTR_NULL; |
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297 | |
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298 | // reset children list root (not used in a process descriptor copy) |
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299 | xlist_root_init( XPTR( local_cxy , &local_process->children_root ) ); |
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300 | local_process->children_nr = 0; |
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301 | remote_spinlock_init( XPTR( local_cxy , &local_process->children_lock ) ); |
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302 | |
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303 | // reset children_list (not used in a process descriptor copy) |
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304 | xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) ); |
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305 | |
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306 | // reset semaphores list root (not used in a process descriptor copy) |
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307 | xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) ); |
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308 | xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) ); |
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309 | xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) ); |
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310 | xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) ); |
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311 | |
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312 | // reset th_tbl[] array as empty |
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313 | uint32_t i; |
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314 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
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315 | { |
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316 | local_process->th_tbl[i] = NULL; |
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317 | } |
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318 | local_process->th_nr = 0; |
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319 | spinlock_init( &local_process->th_lock ); |
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320 | |
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321 | // register new process descriptor in local cluster manager local_list |
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322 | cluster_process_local_link( local_process ); |
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323 | |
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324 | // register new process descriptor in owner cluster manager copies_list |
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325 | cluster_process_copies_link( local_process ); |
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326 | |
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327 | hal_fence(); |
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328 | |
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329 | process_dmsg("\n[DBG] %s : core[%x,%d] exit for process %x\n", |
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330 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , local_process->pid ); |
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331 | |
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332 | return 0; |
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333 | |
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334 | } // end process_copy_init() |
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335 | |
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336 | /////////////////////////////////////////// |
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337 | void process_destroy( process_t * process ) |
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338 | { |
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339 | xptr_t parent_xp; |
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340 | process_t * parent_ptr; |
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341 | cxy_t parent_cxy; |
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342 | xptr_t parent_thread_xp; |
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343 | xptr_t children_lock_xp; |
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344 | xptr_t copies_lock_xp; |
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345 | |
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346 | assert( (process->th_nr == 0) , __FUNCTION__ , |
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347 | "process %x in cluster %x has still active threads", process->pid , local_cxy ); |
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348 | |
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349 | process_dmsg("\n[DBG] %s : core[%x,%d] enter for process %x\n", |
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350 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , process->pid ); |
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351 | |
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352 | // get local process manager pointer |
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353 | pmgr_t * pmgr = &LOCAL_CLUSTER->pmgr; |
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354 | |
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355 | // remove process from local_list in cluster manager |
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356 | remote_spinlock_lock( XPTR( local_cxy , &pmgr->local_lock ) ); |
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357 | xlist_unlink( XPTR( local_cxy , &process->local_list ) ); |
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358 | remote_spinlock_unlock( XPTR( local_cxy , &pmgr->local_lock ) ); |
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359 | |
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360 | // get extended pointer on copies_lock in owner cluster manager |
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361 | cxy_t owner_cxy = CXY_FROM_PID( process->pid ); |
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362 | lpid_t lpid = LPID_FROM_PID( process->pid ); |
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363 | copies_lock_xp = XPTR( owner_cxy , &pmgr->copies_lock[lpid] ); |
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364 | |
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365 | // remove local process from copies_list |
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366 | remote_spinlock_lock( copies_lock_xp ); |
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367 | xlist_unlink( XPTR( local_cxy , &process->copies_list ) ); |
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368 | remote_spinlock_unlock( copies_lock_xp ); |
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369 | |
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370 | // for reference process only |
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371 | if( XPTR( local_cxy , process ) == process->ref_xp ) |
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372 | { |
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373 | // remove reference process from txt_list |
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374 | process_txt_detach( process ); |
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375 | |
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376 | // get pointers on parent process |
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377 | parent_xp = process->parent_xp; |
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378 | parent_cxy = GET_CXY( parent_xp ); |
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379 | parent_ptr = GET_PTR( parent_xp ); |
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380 | |
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381 | // get extended pointer on children_lock in parent process |
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382 | children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock ); |
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383 | |
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384 | // remove process from children_list |
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385 | remote_spinlock_lock( children_lock_xp ); |
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386 | xlist_unlink( XPTR( local_cxy , &process->children_list ) ); |
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387 | remote_spinlock_unlock( children_lock_xp ); |
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388 | |
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389 | // get extende pointer on parent main thread |
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390 | parent_thread_xp = XPTR( parent_cxy , |
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391 | hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->th_tbl[1] ))); |
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392 | |
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393 | // unblock parent process main thread |
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394 | thread_unblock( parent_thread_xp , THREAD_BLOCKED_WAIT ); |
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395 | } |
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396 | |
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397 | // release the process PID to cluster manager |
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398 | cluster_pid_release( process->pid ); |
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399 | |
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400 | // FIXME close all open files and update dirty [AG] |
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401 | |
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402 | // decrease refcount for bin file, root file and cwd file |
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403 | if( process->vfs_bin_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_bin_xp ); |
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404 | if( process->vfs_root_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_root_xp ); |
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405 | if( process->vfs_cwd_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_cwd_xp ); |
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406 | |
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407 | // Destroy VMM |
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408 | vmm_destroy( process ); |
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409 | |
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410 | // release memory allocated to process descriptor |
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411 | process_free( process ); |
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412 | |
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413 | process_dmsg("\n[DBG] %s : core[%x,%d] exit for process %x\n", |
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414 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , process->pid ); |
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415 | |
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416 | } // end process_destroy() |
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417 | |
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418 | ///////////////////////////////////////////////// |
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419 | char * process_action_str( uint32_t action_type ) |
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420 | { |
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421 | if ( action_type == BLOCK_ALL_THREADS ) return "BLOCK"; |
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422 | else if( action_type == UNBLOCK_ALL_THREADS ) return "UNBLOCK"; |
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423 | else if( action_type == DELETE_ALL_THREADS ) return "DELETE"; |
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424 | else return "undefined"; |
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425 | } |
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426 | |
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427 | //////////////////////////////////////////// |
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428 | void process_sigaction( process_t * process, |
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429 | uint32_t action_type ) |
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430 | { |
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431 | cxy_t owner_cxy; // owner cluster identifier |
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432 | lpid_t lpid; // process index in owner cluster |
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433 | cluster_t * cluster; // pointer on cluster manager |
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434 | xptr_t root_xp; // extended pointer on root of copies |
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435 | xptr_t lock_xp; // extended pointer on lock protecting copies |
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436 | xptr_t iter_xp; // iterator on copies list |
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437 | xptr_t process_xp; // extended pointer on process copy |
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438 | cxy_t process_cxy; // process copy cluster identifier |
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439 | process_t * process_ptr; // local pointer on process copy |
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440 | uint32_t responses; // number of remote process copies |
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441 | uint32_t rsp_count; // used to assert number of copies |
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442 | |
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443 | rpc_desc_t rpc; // rpc descriptor allocated in stack |
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444 | |
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445 | process_dmsg("\n[DBG] %s : enter to %s process %x in cluster %x\n", |
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446 | __FUNCTION__ , process_action_str( action_type ) , process->pid , local_cxy ); |
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447 | |
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448 | thread_t * client = CURRENT_THREAD; |
---|
449 | xptr_t client_xp = XPTR( local_cxy , client ); |
---|
450 | |
---|
451 | // get local pointer on local cluster manager |
---|
452 | cluster = LOCAL_CLUSTER; |
---|
453 | |
---|
454 | // get owner cluster identifier and process lpid |
---|
455 | owner_cxy = CXY_FROM_PID( process->pid ); |
---|
456 | lpid = LPID_FROM_PID( process->pid ); |
---|
457 | |
---|
458 | // check owner cluster |
---|
459 | assert( (owner_cxy == local_cxy) , __FUNCTION__ , "must be executed in owner cluster\n" ); |
---|
460 | |
---|
461 | // get number of remote copies |
---|
462 | responses = cluster->pmgr.copies_nr[lpid] - 1; |
---|
463 | rsp_count = 0; |
---|
464 | |
---|
465 | // check action type |
---|
466 | assert( ((action_type == DELETE_ALL_THREADS ) || |
---|
467 | (action_type == BLOCK_ALL_THREADS ) || |
---|
468 | (action_type == UNBLOCK_ALL_THREADS )), __FUNCTION__ , "illegal action type" ); |
---|
469 | |
---|
470 | // initialise rpc descriptor |
---|
471 | rpc.index = RPC_PROCESS_SIGACTION; |
---|
472 | rpc.response = responses; |
---|
473 | rpc.blocking = false; |
---|
474 | rpc.thread = client; |
---|
475 | |
---|
476 | // get extended pointers on copies root and lock |
---|
477 | root_xp = XPTR( local_cxy , &cluster->pmgr.copies_root[lpid] ); |
---|
478 | lock_xp = XPTR( local_cxy , &cluster->pmgr.copies_lock[lpid] ); |
---|
479 | |
---|
480 | // take the lock protecting the copies |
---|
481 | remote_spinlock_lock( lock_xp ); |
---|
482 | |
---|
483 | // send RPCs to remote clusters |
---|
484 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
485 | { |
---|
486 | process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list ); |
---|
487 | process_cxy = GET_CXY( process_xp ); |
---|
488 | process_ptr = (process_t *)GET_PTR( process_xp ); |
---|
489 | |
---|
490 | // send RPC to remote clusters |
---|
491 | if( process_cxy != local_cxy ) |
---|
492 | { |
---|
493 | |
---|
494 | process_dmsg("\n[DBG] %s : send RPC to remote cluster %x\n", |
---|
495 | __FUNCTION__ , process_cxy ); |
---|
496 | |
---|
497 | rpc.args[0] = (uint64_t)action_type; |
---|
498 | rpc.args[1] = (uint64_t)(intptr_t)process_ptr; |
---|
499 | rpc_process_sigaction_client( process_cxy , &rpc ); |
---|
500 | rsp_count++; |
---|
501 | } |
---|
502 | } |
---|
503 | |
---|
504 | // release the lock protecting process copies |
---|
505 | remote_spinlock_unlock( lock_xp ); |
---|
506 | |
---|
507 | // check number of copies... |
---|
508 | assert( (rsp_count == responses) , __FUNCTION__ , |
---|
509 | "unconsistent number of process copies : rsp_count = %d / responses = %d", |
---|
510 | rsp_count , responses ); |
---|
511 | |
---|
512 | // block and deschedule to wait RPC responses if required |
---|
513 | if( responses ) |
---|
514 | { |
---|
515 | thread_block( CURRENT_THREAD , THREAD_BLOCKED_RPC ); |
---|
516 | sched_yield("BLOCKED on RPC_PROCESS_SIGACTION"); |
---|
517 | } |
---|
518 | |
---|
519 | process_dmsg("\n[DBG] %s : make action in owner cluster %x\n", |
---|
520 | __FUNCTION__ , local_cxy ); |
---|
521 | |
---|
522 | |
---|
523 | // call directly the relevant function in local owner cluster |
---|
524 | if (action_type == DELETE_ALL_THREADS ) process_delete_threads ( process , client_xp ); |
---|
525 | else if (action_type == BLOCK_ALL_THREADS ) process_block_threads ( process , client_xp ); |
---|
526 | else if (action_type == UNBLOCK_ALL_THREADS ) process_unblock_threads( process ); |
---|
527 | |
---|
528 | process_dmsg("\n[DBG] %s : exit after %s process %x in cluster %x\n", |
---|
529 | __FUNCTION__ , process_action_str( action_type ) , process->pid , local_cxy ); |
---|
530 | |
---|
531 | } // end process_sigaction() |
---|
532 | |
---|
533 | //////////////////////////////////////////////// |
---|
534 | void process_block_threads( process_t * process, |
---|
535 | xptr_t client_xp ) |
---|
536 | { |
---|
537 | thread_t * target; // pointer on target thread |
---|
538 | uint32_t ltid; // index in process th_tbl |
---|
539 | thread_t * requester; // requesting thread pointer |
---|
540 | uint32_t count; // requests counter |
---|
541 | volatile uint32_t rsp_count; // responses counter |
---|
542 | |
---|
543 | // get calling thread pointer |
---|
544 | requester = CURRENT_THREAD; |
---|
545 | |
---|
546 | sigaction_dmsg("\n[DBG] %s : enter for process %x in cluster %x\n", |
---|
547 | __FUNCTION__ , process->pid , local_cxy ); |
---|
548 | |
---|
549 | // get lock protecting process th_tbl[] |
---|
550 | spinlock_lock( &process->th_lock ); |
---|
551 | |
---|
552 | // initialize local responses counter |
---|
553 | rsp_count = process->th_nr; |
---|
554 | |
---|
555 | // loop on process threads to block and deschedule all threads in cluster |
---|
556 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
557 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
558 | { |
---|
559 | target = process->th_tbl[ltid]; |
---|
560 | |
---|
561 | if( target != NULL ) // thread found |
---|
562 | { |
---|
563 | count++; |
---|
564 | |
---|
565 | // - if the target thread is the client thread, we do nothing, |
---|
566 | // and we simply decrement the responses counter. |
---|
567 | // - if the calling thread and the target thread are on the same core, |
---|
568 | // we block the target thread, we don't need confirmation from scheduler, |
---|
569 | // and we simply decrement the responses counter. |
---|
570 | // - if the calling thread and the target thread are not running on the same |
---|
571 | // core, we ask the target scheduler to acknowlege the blocking |
---|
572 | // to be sure that the target thread is not running. |
---|
573 | |
---|
574 | if( XPTR( local_cxy , target ) == client_xp ) |
---|
575 | { |
---|
576 | // decrement responses counter |
---|
577 | hal_atomic_add( (void *)&rsp_count , -1 ); |
---|
578 | } |
---|
579 | else if( requester->core->lid == target->core->lid ) |
---|
580 | { |
---|
581 | // set the global blocked bit in target thread descriptor. |
---|
582 | thread_block( target , THREAD_BLOCKED_GLOBAL ); |
---|
583 | |
---|
584 | // decrement responses counter |
---|
585 | hal_atomic_add( (void *)&rsp_count , -1 ); |
---|
586 | } |
---|
587 | else |
---|
588 | { |
---|
589 | // set the global blocked bit in target thread descriptor. |
---|
590 | thread_block( target , THREAD_BLOCKED_GLOBAL ); |
---|
591 | |
---|
592 | // set FLAG_REQ_ACK and &ack_rsp_count in target descriptor |
---|
593 | thread_set_req_ack( target , (void *)&rsp_count ); |
---|
594 | |
---|
595 | // force scheduling on target thread |
---|
596 | dev_pic_send_ipi( local_cxy , target->core->lid ); |
---|
597 | } |
---|
598 | } |
---|
599 | } |
---|
600 | |
---|
601 | // release lock protecting process th_tbl[] |
---|
602 | spinlock_unlock( &process->th_lock ); |
---|
603 | |
---|
604 | // wait all responses from schedulers |
---|
605 | while( 1 ) |
---|
606 | { |
---|
607 | // exit loop when all local responses received |
---|
608 | if ( rsp_count == 0 ) break; |
---|
609 | |
---|
610 | // wait 1000 cycles before retry |
---|
611 | hal_fixed_delay( 1000 ); |
---|
612 | } |
---|
613 | |
---|
614 | sigaction_dmsg("\n[DBG] %s : exit for process %x in cluster %x / %d threads blocked\n", |
---|
615 | __FUNCTION__ , process->pid , local_cxy , count ); |
---|
616 | |
---|
617 | } // end process_block_threads() |
---|
618 | |
---|
619 | /////////////////////////////////////////////////// |
---|
620 | void process_unblock_threads( process_t * process ) |
---|
621 | { |
---|
622 | thread_t * target; // pointer on target thead |
---|
623 | uint32_t ltid; // index in process th_tbl |
---|
624 | uint32_t count; // requests counter |
---|
625 | |
---|
626 | sigaction_dmsg("\n[DBG] %s : enter for process %x in cluster %x\n", |
---|
627 | __FUNCTION__ , process->pid , local_cxy ); |
---|
628 | |
---|
629 | // get lock protecting process th_tbl[] |
---|
630 | spinlock_lock( &process->th_lock ); |
---|
631 | |
---|
632 | // loop on process threads to unblock all threads in cluster |
---|
633 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
634 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
635 | { |
---|
636 | target = process->th_tbl[ltid]; |
---|
637 | |
---|
638 | if( target != NULL ) // thread found |
---|
639 | { |
---|
640 | count++; |
---|
641 | |
---|
642 | // reset the global blocked bit in target thread descriptor. |
---|
643 | thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL ); |
---|
644 | } |
---|
645 | } |
---|
646 | |
---|
647 | // release lock protecting process th_tbl[] |
---|
648 | spinlock_unlock( &process->th_lock ); |
---|
649 | |
---|
650 | sigaction_dmsg("\n[DBG] %s : exit for process %x in cluster %x / %d threads blocked\n", |
---|
651 | __FUNCTION__ , process->pid , local_cxy , count ); |
---|
652 | |
---|
653 | } // end process_unblock_threads() |
---|
654 | |
---|
655 | ///////////////////////////////////////////////// |
---|
656 | void process_delete_threads( process_t * process, |
---|
657 | xptr_t client_xp ) |
---|
658 | { |
---|
659 | thread_t * target; // pointer on target thread |
---|
660 | uint32_t ltid; // index in process th_tbl |
---|
661 | uint32_t count; // request counter |
---|
662 | |
---|
663 | sigaction_dmsg("\n[DBG] %s : enter for process %x in cluster %x at cycle %d\n", |
---|
664 | __FUNCTION__ , process->pid , local_cxy , (uint32_t)hal_get_cycles() ); |
---|
665 | |
---|
666 | // get lock protecting process th_tbl[] |
---|
667 | spinlock_lock( &process->th_lock ); |
---|
668 | |
---|
669 | // loop on threads to set the REQ_DELETE flag |
---|
670 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
671 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
672 | { |
---|
673 | target = process->th_tbl[ltid]; |
---|
674 | |
---|
675 | if( target != NULL ) // thread found |
---|
676 | { |
---|
677 | count++; |
---|
678 | |
---|
679 | // delete only if the target is not the client |
---|
680 | if( XPTR( local_cxy , target ) != client_xp ) |
---|
681 | { |
---|
682 | hal_atomic_or( &target->flags , THREAD_FLAG_REQ_DELETE ); |
---|
683 | } |
---|
684 | } |
---|
685 | } |
---|
686 | |
---|
687 | // release lock protecting process th_tbl[] |
---|
688 | spinlock_unlock( &process->th_lock ); |
---|
689 | |
---|
690 | sigaction_dmsg("\n[DBG] %s : exit for process %x in cluster %x at cycle %d\n", |
---|
691 | __FUNCTION__ , process->pid , local_cxy , (uint32_t)hal_get_cycles() ); |
---|
692 | |
---|
693 | } // end process_delete_threads() |
---|
694 | |
---|
695 | /////////////////////////////////////////////// |
---|
696 | process_t * process_get_local_copy( pid_t pid ) |
---|
697 | { |
---|
698 | error_t error; |
---|
699 | process_t * process_ptr; // local pointer on process |
---|
700 | xptr_t process_xp; // extended pointer on process |
---|
701 | |
---|
702 | cluster_t * cluster = LOCAL_CLUSTER; |
---|
703 | |
---|
704 | // get lock protecting local list of processes |
---|
705 | remote_spinlock_lock( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
---|
706 | |
---|
707 | // scan the local list of process descriptors to find the process |
---|
708 | xptr_t iter; |
---|
709 | bool_t found = false; |
---|
710 | XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter ) |
---|
711 | { |
---|
712 | process_xp = XLIST_ELEMENT( iter , process_t , local_list ); |
---|
713 | process_ptr = (process_t *)GET_PTR( process_xp ); |
---|
714 | if( process_ptr->pid == pid ) |
---|
715 | { |
---|
716 | found = true; |
---|
717 | break; |
---|
718 | } |
---|
719 | } |
---|
720 | |
---|
721 | // release lock protecting local list of processes |
---|
722 | remote_spinlock_unlock( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
---|
723 | |
---|
724 | // allocate memory for a new local process descriptor |
---|
725 | // and initialise it from reference cluster if required |
---|
726 | if( !found ) |
---|
727 | { |
---|
728 | // get extended pointer on reference process descriptor |
---|
729 | xptr_t ref_xp = cluster_get_reference_process_from_pid( pid ); |
---|
730 | |
---|
731 | assert( (ref_xp != XPTR_NULL) , __FUNCTION__ , "illegal pid\n" ); |
---|
732 | |
---|
733 | // allocate memory for local process descriptor |
---|
734 | process_ptr = process_alloc(); |
---|
735 | if( process_ptr == NULL ) return NULL; |
---|
736 | |
---|
737 | // initialize local process descriptor copy |
---|
738 | error = process_copy_init( process_ptr , ref_xp ); |
---|
739 | if( error ) return NULL; |
---|
740 | } |
---|
741 | |
---|
742 | return process_ptr; |
---|
743 | |
---|
744 | } // end process_get_local_copy() |
---|
745 | |
---|
746 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
747 | // File descriptor array related functions |
---|
748 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
749 | |
---|
750 | /////////////////////////////////////////// |
---|
751 | void process_fd_init( process_t * process ) |
---|
752 | { |
---|
753 | uint32_t fd; |
---|
754 | |
---|
755 | remote_spinlock_init( XPTR( local_cxy , &process->fd_array.lock ) ); |
---|
756 | |
---|
757 | process->fd_array.current = 0; |
---|
758 | |
---|
759 | // initialize array |
---|
760 | for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ ) |
---|
761 | { |
---|
762 | process->fd_array.array[fd] = XPTR_NULL; |
---|
763 | } |
---|
764 | } |
---|
765 | |
---|
766 | ////////////////////////////// |
---|
767 | bool_t process_fd_array_full() |
---|
768 | { |
---|
769 | // get extended pointer on reference process |
---|
770 | xptr_t ref_xp = CURRENT_THREAD->process->ref_xp; |
---|
771 | |
---|
772 | // get reference process cluster and local pointer |
---|
773 | process_t * ref_ptr = (process_t *)GET_PTR( ref_xp ); |
---|
774 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
775 | |
---|
776 | // get number of open file descriptors from reference fd_array |
---|
777 | uint32_t current = hal_remote_lw( XPTR( ref_cxy , &ref_ptr->fd_array.current ) ); |
---|
778 | |
---|
779 | return ( current >= CONFIG_PROCESS_FILE_MAX_NR ); |
---|
780 | } |
---|
781 | |
---|
782 | ///////////////////////////////////////////////// |
---|
783 | error_t process_fd_register( process_t * process, |
---|
784 | xptr_t file_xp, |
---|
785 | uint32_t * fdid ) |
---|
786 | { |
---|
787 | bool_t found; |
---|
788 | uint32_t id; |
---|
789 | xptr_t xp; |
---|
790 | |
---|
791 | // get reference process cluster and local pointer |
---|
792 | xptr_t ref_xp = process->ref_xp; |
---|
793 | process_t * ref_ptr = (process_t *)GET_PTR( ref_xp ); |
---|
794 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
795 | |
---|
796 | // take lock protecting reference fd_array |
---|
797 | remote_spinlock_lock( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) ); |
---|
798 | |
---|
799 | found = false; |
---|
800 | |
---|
801 | for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ ) |
---|
802 | { |
---|
803 | xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) ); |
---|
804 | if ( xp == XPTR_NULL ) |
---|
805 | { |
---|
806 | found = true; |
---|
807 | hal_remote_swd( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) , file_xp ); |
---|
808 | hal_remote_atomic_add( XPTR( ref_cxy , &ref_ptr->fd_array.current ) , 1 ); |
---|
809 | *fdid = id; |
---|
810 | break; |
---|
811 | } |
---|
812 | } |
---|
813 | |
---|
814 | // release lock protecting reference fd_array |
---|
815 | remote_spinlock_unlock( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) ); |
---|
816 | |
---|
817 | if ( !found ) return -1; |
---|
818 | else return 0; |
---|
819 | } |
---|
820 | |
---|
821 | //////////////////////////////////////////////// |
---|
822 | xptr_t process_fd_get_xptr( process_t * process, |
---|
823 | uint32_t fdid ) |
---|
824 | { |
---|
825 | xptr_t file_xp; |
---|
826 | |
---|
827 | // access local copy of process descriptor |
---|
828 | file_xp = process->fd_array.array[fdid]; |
---|
829 | |
---|
830 | if( file_xp == XPTR_NULL ) |
---|
831 | { |
---|
832 | // get reference process cluster and local pointer |
---|
833 | xptr_t ref_xp = process->ref_xp; |
---|
834 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
835 | process_t * ref_ptr = (process_t *)GET_PTR( ref_xp ); |
---|
836 | |
---|
837 | // access reference process descriptor |
---|
838 | file_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->fd_array.array[fdid] ) ); |
---|
839 | |
---|
840 | // update local fd_array if found |
---|
841 | if( file_xp != XPTR_NULL ) |
---|
842 | { |
---|
843 | process->fd_array.array[fdid] = file_xp; |
---|
844 | } |
---|
845 | } |
---|
846 | |
---|
847 | return file_xp; |
---|
848 | |
---|
849 | } // end process_fd_get_xptr() |
---|
850 | |
---|
851 | /////////////////////////////////////////// |
---|
852 | void process_fd_remote_copy( xptr_t dst_xp, |
---|
853 | xptr_t src_xp ) |
---|
854 | { |
---|
855 | uint32_t fd; |
---|
856 | xptr_t entry; |
---|
857 | |
---|
858 | // get cluster and local pointer for src fd_array |
---|
859 | cxy_t src_cxy = GET_CXY( src_xp ); |
---|
860 | fd_array_t * src_ptr = (fd_array_t *)GET_PTR( src_xp ); |
---|
861 | |
---|
862 | // get cluster and local pointer for dst fd_array |
---|
863 | cxy_t dst_cxy = GET_CXY( dst_xp ); |
---|
864 | fd_array_t * dst_ptr = (fd_array_t *)GET_PTR( dst_xp ); |
---|
865 | |
---|
866 | // get the remote lock protecting the src fd_array |
---|
867 | remote_spinlock_lock( XPTR( src_cxy , &src_ptr->lock ) ); |
---|
868 | |
---|
869 | // loop on all fd_array entries |
---|
870 | for( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ ) |
---|
871 | { |
---|
872 | entry = (xptr_t)hal_remote_lwd( XPTR( src_cxy , &src_ptr->array[fd] ) ); |
---|
873 | |
---|
874 | if( entry != XPTR_NULL ) |
---|
875 | { |
---|
876 | // increment file descriptor ref count |
---|
877 | vfs_file_count_up( entry ); |
---|
878 | |
---|
879 | // copy entry in destination process fd_array |
---|
880 | hal_remote_swd( XPTR( dst_cxy , &dst_ptr->array[fd] ) , entry ); |
---|
881 | } |
---|
882 | } |
---|
883 | |
---|
884 | // release lock on source process fd_array |
---|
885 | remote_spinlock_unlock( XPTR( src_cxy , &src_ptr->lock ) ); |
---|
886 | |
---|
887 | } // end process_fd_remote_copy() |
---|
888 | |
---|
889 | //////////////////////////////////////////////////////////////////////////////////// |
---|
890 | // Thread related functions |
---|
891 | //////////////////////////////////////////////////////////////////////////////////// |
---|
892 | |
---|
893 | ///////////////////////////////////////////////////// |
---|
894 | error_t process_register_thread( process_t * process, |
---|
895 | thread_t * thread, |
---|
896 | trdid_t * trdid ) |
---|
897 | { |
---|
898 | ltid_t ltid; |
---|
899 | bool_t found = false; |
---|
900 | |
---|
901 | assert( (process != NULL) , __FUNCTION__ , "process argument is NULL" ); |
---|
902 | |
---|
903 | assert( (thread != NULL) , __FUNCTION__ , "thread argument is NULL" ); |
---|
904 | |
---|
905 | // take lock protecting th_tbl |
---|
906 | spinlock_lock( &process->th_lock ); |
---|
907 | |
---|
908 | // search a free slot in th_tbl[] |
---|
909 | for( ltid = 0 ; ltid < CONFIG_THREAD_MAX_PER_CLUSTER ; ltid++ ) |
---|
910 | { |
---|
911 | if( process->th_tbl[ltid] == NULL ) |
---|
912 | { |
---|
913 | found = true; |
---|
914 | break; |
---|
915 | } |
---|
916 | } |
---|
917 | |
---|
918 | if( found ) |
---|
919 | { |
---|
920 | // register thread in th_tbl[] |
---|
921 | process->th_tbl[ltid] = thread; |
---|
922 | process->th_nr++; |
---|
923 | |
---|
924 | // returns trdid |
---|
925 | *trdid = TRDID( local_cxy , ltid ); |
---|
926 | } |
---|
927 | |
---|
928 | |
---|
929 | // release lock protecting th_tbl |
---|
930 | hal_fence(); |
---|
931 | spinlock_unlock( &process->th_lock ); |
---|
932 | |
---|
933 | return (found) ? 0 : ENOMEM; |
---|
934 | |
---|
935 | } // end process_register_thread() |
---|
936 | |
---|
937 | /////////////////////////////////////////////// |
---|
938 | void process_remove_thread( thread_t * thread ) |
---|
939 | { |
---|
940 | assert( (thread != NULL) , __FUNCTION__ , "thread argument is NULL" ); |
---|
941 | |
---|
942 | process_t * process = thread->process; |
---|
943 | |
---|
944 | // get thread local index |
---|
945 | ltid_t ltid = LTID_FROM_TRDID( thread->trdid ); |
---|
946 | |
---|
947 | // take lock protecting th_tbl |
---|
948 | spinlock_lock( &process->th_lock ); |
---|
949 | |
---|
950 | assert( (process->th_nr) , __FUNCTION__ , "process th_nr cannot be 0\n" ); |
---|
951 | |
---|
952 | // remove thread from th_tbl[] |
---|
953 | process->th_tbl[ltid] = NULL; |
---|
954 | process->th_nr--; |
---|
955 | |
---|
956 | hal_fence(); |
---|
957 | |
---|
958 | // release lock protecting th_tbl |
---|
959 | spinlock_unlock( &process->th_lock ); |
---|
960 | |
---|
961 | } // process_remove_thread() |
---|
962 | |
---|
963 | ///////////////////////////////////////////////////////// |
---|
964 | error_t process_make_fork( xptr_t parent_process_xp, |
---|
965 | xptr_t parent_thread_xp, |
---|
966 | pid_t * child_pid, |
---|
967 | thread_t ** child_thread ) |
---|
968 | { |
---|
969 | process_t * process; // local pointer on child process descriptor |
---|
970 | thread_t * thread; // local pointer on child thread descriptor |
---|
971 | pid_t new_pid; // process identifier for child process |
---|
972 | pid_t parent_pid; // process identifier for parent process |
---|
973 | xptr_t ref_xp; // extended pointer on reference process |
---|
974 | xptr_t vfs_bin_xp; // extended pointer on .elf file |
---|
975 | error_t error; |
---|
976 | |
---|
977 | // get cluster and local pointer for parent process |
---|
978 | cxy_t parent_process_cxy = GET_CXY( parent_process_xp ); |
---|
979 | process_t * parent_process_ptr = (process_t *)GET_PTR( parent_process_xp ); |
---|
980 | |
---|
981 | // get parent process PID and extended pointer on .elf file |
---|
982 | parent_pid = hal_remote_lw (XPTR( parent_process_cxy , &parent_process_ptr->pid)); |
---|
983 | vfs_bin_xp = hal_remote_lwd(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp)); |
---|
984 | |
---|
985 | // check parent process is the reference |
---|
986 | ref_xp = hal_remote_lwd( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) ); |
---|
987 | assert( (parent_process_xp == ref_xp ) , __FUNCTION__ , |
---|
988 | "parent process must be the reference process\n" ); |
---|
989 | |
---|
990 | fork_dmsg("\n[DBG] %s : core[%x,%d] enter at cycle %d\n", |
---|
991 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid , (uint32_t)hal_get_cycles() ); |
---|
992 | |
---|
993 | // allocate a process descriptor |
---|
994 | process = process_alloc(); |
---|
995 | if( process == NULL ) |
---|
996 | { |
---|
997 | printk("\n[ERROR] in %s : cannot get process in cluster %x\n", |
---|
998 | __FUNCTION__, local_cxy ); |
---|
999 | return -1; |
---|
1000 | } |
---|
1001 | |
---|
1002 | fork_dmsg("\n[DBG] %s : core[%x,%d] created child process %x at cycle %d\n", |
---|
1003 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, process, (uint32_t)hal_get_cycles() ); |
---|
1004 | |
---|
1005 | // allocate a child PID from local cluster |
---|
1006 | error = cluster_pid_alloc( process , &new_pid ); |
---|
1007 | if( error ) |
---|
1008 | { |
---|
1009 | printk("\n[ERROR] in %s : cannot get PID in cluster %x\n", |
---|
1010 | __FUNCTION__, local_cxy ); |
---|
1011 | process_free( process ); |
---|
1012 | return -1; |
---|
1013 | } |
---|
1014 | |
---|
1015 | fork_dmsg("\n[DBG] %s : core[%x, %d] child process PID = %x at cycle %d\n", |
---|
1016 | __FUNCTION__ , local_cxy, CURRENT_THREAD->core->lid, new_pid , (uint32_t)hal_get_cycles() ); |
---|
1017 | |
---|
1018 | // initializes child process descriptor from parent process descriptor |
---|
1019 | process_reference_init( process, |
---|
1020 | new_pid, |
---|
1021 | parent_process_xp, |
---|
1022 | parent_process_xp ); |
---|
1023 | |
---|
1024 | fork_dmsg("\n[DBG] %s : core[%x, %d] child process initialised at cycle %d\n", |
---|
1025 | __FUNCTION__ , local_cxy, CURRENT_THREAD->core->lid, hal_get_cycles() ); |
---|
1026 | |
---|
1027 | // copy VMM from parent descriptor to child descriptor |
---|
1028 | error = vmm_fork_copy( process, |
---|
1029 | parent_process_xp ); |
---|
1030 | if( error ) |
---|
1031 | { |
---|
1032 | printk("\n[ERROR] in %s : cannot copy VMM in cluster %x\n", |
---|
1033 | __FUNCTION__, local_cxy ); |
---|
1034 | process_free( process ); |
---|
1035 | cluster_pid_release( new_pid ); |
---|
1036 | return -1; |
---|
1037 | } |
---|
1038 | |
---|
1039 | fork_dmsg("\n[DBG] %s : core[%x, %d] child process VMM copied at cycle %d\n", |
---|
1040 | __FUNCTION__ , local_cxy, CURRENT_THREAD->core->lid, (uint32_t)hal_get_cycles() ); |
---|
1041 | |
---|
1042 | // update extended pointer on .elf file |
---|
1043 | process->vfs_bin_xp = vfs_bin_xp; |
---|
1044 | |
---|
1045 | // create child thread descriptor from parent thread descriptor |
---|
1046 | error = thread_user_fork( parent_thread_xp, |
---|
1047 | process, |
---|
1048 | &thread ); |
---|
1049 | if( error ) |
---|
1050 | { |
---|
1051 | printk("\n[ERROR] in %s : cannot create thread in cluster %x\n", |
---|
1052 | __FUNCTION__, local_cxy ); |
---|
1053 | process_free( process ); |
---|
1054 | cluster_pid_release( new_pid ); |
---|
1055 | return -1; |
---|
1056 | } |
---|
1057 | |
---|
1058 | // check main thread index |
---|
1059 | assert( (thread->trdid == 0) , __FUNCTION__ , "main thread must have index 0\n" ); |
---|
1060 | |
---|
1061 | fork_dmsg("\n[DBG] %s : core[%x,%d] child thread created at cycle %d\n", |
---|
1062 | __FUNCTION__ , local_cxy, CURRENT_THREAD->core->lid, (uint32_t)hal_get_cycles() ); |
---|
1063 | |
---|
1064 | // update parent process GPT to set Copy_On_Write for shared data vsegs |
---|
1065 | // this includes all replicated GPT copies |
---|
1066 | if( parent_process_cxy == local_cxy ) // reference is local |
---|
1067 | { |
---|
1068 | vmm_set_cow( parent_process_ptr ); |
---|
1069 | } |
---|
1070 | else // reference is remote |
---|
1071 | { |
---|
1072 | rpc_vmm_set_cow_client( parent_process_cxy, |
---|
1073 | parent_process_ptr ); |
---|
1074 | } |
---|
1075 | |
---|
1076 | fork_dmsg("\n[DBG] %s : core[%x,%d] COW set in parent_process at cycle %d\n", |
---|
1077 | __FUNCTION__ , local_cxy, CURRENT_THREAD->core->lid, (uint32_t)hal_get_cycles() ); |
---|
1078 | |
---|
1079 | // get extended pointers on parent children_root, children_lock and children_nr |
---|
1080 | xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root ); |
---|
1081 | xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock ); |
---|
1082 | xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr ); |
---|
1083 | |
---|
1084 | // register process in parent children list |
---|
1085 | remote_spinlock_lock( children_lock_xp ); |
---|
1086 | xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) ); |
---|
1087 | hal_remote_atomic_add( children_nr_xp , 1 ); |
---|
1088 | remote_spinlock_unlock( children_lock_xp ); |
---|
1089 | |
---|
1090 | // return success |
---|
1091 | *child_thread = thread; |
---|
1092 | *child_pid = new_pid; |
---|
1093 | |
---|
1094 | |
---|
1095 | fork_dmsg("\n[DBG] %s : core[%x,%d] exit at cycle %d\n", |
---|
1096 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, (uint32_t)hal_get_cycles() ); |
---|
1097 | |
---|
1098 | return 0; |
---|
1099 | |
---|
1100 | } // end process_make_fork() |
---|
1101 | |
---|
1102 | |
---|
1103 | ///////////////////////////////////////////////////// |
---|
1104 | error_t process_make_exec( exec_info_t * exec_info ) |
---|
1105 | { |
---|
1106 | char * path; // pathname to .elf file |
---|
1107 | pid_t pid; // old_process PID given to new_process |
---|
1108 | pid_t temp_pid; // temporary PID given to old_process |
---|
1109 | process_t * old_process; // local pointer on old process |
---|
1110 | process_t * new_process; // local pointer on new process |
---|
1111 | thread_t * new_thread; // local pointer on main thread |
---|
1112 | pthread_attr_t attr; // main thread attributes |
---|
1113 | lid_t lid; // selected core local index |
---|
1114 | error_t error; |
---|
1115 | |
---|
1116 | // get .elf pathname and PID from exec_info |
---|
1117 | path = exec_info->path; |
---|
1118 | pid = exec_info->pid; |
---|
1119 | |
---|
1120 | // this function must be executed by a thread running in owner cluster |
---|
1121 | assert( (CXY_FROM_PID( pid ) == local_cxy), __FUNCTION__, |
---|
1122 | "local cluster %x is not owner for process %x\n", local_cxy, pid ); |
---|
1123 | |
---|
1124 | exec_dmsg("\n[DBG] %s : core[%x,%d] enters for process %x / %s / cycle %d\n", |
---|
1125 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, pid, path, (uint32_t)hal_get_cycles() ); |
---|
1126 | |
---|
1127 | // get old_process local pointer |
---|
1128 | old_process = (process_t *)cluster_get_local_process_from_pid( pid ); |
---|
1129 | |
---|
1130 | if( old_process == NULL ) |
---|
1131 | { |
---|
1132 | printk("\n[ERROR] in %s : cannot get old process descriptor\n", __FUNCTION__ ); |
---|
1133 | return -1; |
---|
1134 | } |
---|
1135 | |
---|
1136 | // allocate memory for new_process descriptor |
---|
1137 | new_process = process_alloc(); |
---|
1138 | |
---|
1139 | if( new_process == NULL ) |
---|
1140 | { |
---|
1141 | printk("\n[ERROR] in %s : cannot allocate process descriptor in cluster %x\n", |
---|
1142 | __FUNCTION__ , local_cxy ); |
---|
1143 | return -1; |
---|
1144 | } |
---|
1145 | |
---|
1146 | // get a new PID for old_process |
---|
1147 | error = cluster_pid_alloc( old_process , &temp_pid ); |
---|
1148 | if( error ) |
---|
1149 | { |
---|
1150 | printk("\n[ERROR] in %s : cannot get PID in cluster %x\n", |
---|
1151 | __FUNCTION__ , local_cxy ); |
---|
1152 | process_free( new_process ); |
---|
1153 | return -1; |
---|
1154 | } |
---|
1155 | |
---|
1156 | // request blocking for all threads in old_process (but the calling thread) |
---|
1157 | process_sigaction( old_process , BLOCK_ALL_THREADS ); |
---|
1158 | |
---|
1159 | // request destruction for all threads in old_process (but the calling thread) |
---|
1160 | process_sigaction( old_process , DELETE_ALL_THREADS ); |
---|
1161 | |
---|
1162 | exec_dmsg("\n[DBG] %s : core[%x,%d] marked old threads for destruction / cycle %d\n", |
---|
1163 | __FUNCTION__ , local_cxy, CURRENT_THREAD->core->lid , (uint32_t)hal_get_cycles() ); |
---|
1164 | |
---|
1165 | // set new PID to old_process |
---|
1166 | old_process->pid = temp_pid; |
---|
1167 | |
---|
1168 | // initialize new process descriptor |
---|
1169 | process_reference_init( new_process, |
---|
1170 | pid, |
---|
1171 | old_process->parent_xp, // parent_process_xp |
---|
1172 | XPTR(local_cxy , old_process) ); // model_process_xp |
---|
1173 | |
---|
1174 | // give TXT ownership to new_process |
---|
1175 | process_txt_set_ownership( XPTR( local_cxy , new_process ) ); |
---|
1176 | |
---|
1177 | exec_dmsg("\n[DBG] %s : core[%x,%d] initialised new process %x / cycle %d \n", |
---|
1178 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, new_process, (uint32_t)hal_get_cycles() ); |
---|
1179 | |
---|
1180 | // register code & data vsegs as well as entry-point in new process VMM, |
---|
1181 | // and register extended pointer on .elf file in process descriptor |
---|
1182 | if( elf_load_process( path , new_process ) ) |
---|
1183 | { |
---|
1184 | printk("\n[ERROR] in %s : failed to access .elf file for path %s\n", |
---|
1185 | __FUNCTION__ , path ); |
---|
1186 | process_destroy( new_process ); |
---|
1187 | return -1; |
---|
1188 | } |
---|
1189 | |
---|
1190 | exec_dmsg("\n[DBG] %s : core[%x,%d] vsegs registered in new process %x / cycle %d\n", |
---|
1191 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, new_process, (uint32_t)hal_get_cycles() ); |
---|
1192 | |
---|
1193 | // select a core in local cluster to execute the main thread |
---|
1194 | lid = cluster_select_local_core(); |
---|
1195 | |
---|
1196 | // initialize pthread attributes for main thread |
---|
1197 | attr.attributes = PT_ATTR_DETACH | PT_ATTR_CLUSTER_DEFINED | PT_ATTR_CORE_DEFINED; |
---|
1198 | attr.cxy = local_cxy; |
---|
1199 | attr.lid = lid; |
---|
1200 | |
---|
1201 | // create and initialize main thread in local cluster |
---|
1202 | error = thread_user_create( pid, |
---|
1203 | (void *)new_process->vmm.entry_point, |
---|
1204 | exec_info->args_pointers, |
---|
1205 | &attr, |
---|
1206 | &new_thread ); |
---|
1207 | if( error ) |
---|
1208 | { |
---|
1209 | printk("\n[ERROR] in %s : cannot create thread for process %x\n", |
---|
1210 | __FUNCTION__ , new_process ); |
---|
1211 | process_destroy( new_process ); |
---|
1212 | return -1; |
---|
1213 | } |
---|
1214 | |
---|
1215 | // check main thread index |
---|
1216 | assert( (new_thread->trdid == 0) , __FUNCTION__ , "main thread must have index 0\n" ); |
---|
1217 | |
---|
1218 | exec_dmsg("\n[DBG] %s : core[%x,%d] created new_process main thread / cycle %d\n", |
---|
1219 | __FUNCTION__ , local_cxy, CURRENT_THREAD->core->lid, (uint32_t)hal_get_cycles() ); |
---|
1220 | |
---|
1221 | // get pointers on parent process |
---|
1222 | xptr_t parent_xp = new_process->parent_xp; |
---|
1223 | process_t * parent_ptr = GET_PTR( parent_xp ); |
---|
1224 | cxy_t parent_cxy = GET_CXY( parent_xp ); |
---|
1225 | |
---|
1226 | // get extended pointers on parent children_root, children_lock and children_nr |
---|
1227 | xptr_t root_xp = XPTR( parent_cxy , &parent_ptr->children_root ); |
---|
1228 | xptr_t lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock ); |
---|
1229 | xptr_t nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr ); |
---|
1230 | |
---|
1231 | // register new_process in parent children list |
---|
1232 | remote_spinlock_lock( lock_xp ); |
---|
1233 | xlist_add_last( root_xp , XPTR( local_cxy , &new_process->children_list ) ); |
---|
1234 | hal_remote_atomic_add( nr_xp , 1 ); |
---|
1235 | remote_spinlock_unlock( lock_xp ); |
---|
1236 | |
---|
1237 | exec_dmsg("\n[DBG] %s : core[%x,%d] updated parent process children list / cycle %d\n", |
---|
1238 | __FUNCTION__ , local_cxy, CURRENT_THREAD->core->lid, (uint32_t)hal_get_cycles() ); |
---|
1239 | |
---|
1240 | // block and mark calling thread for deletion |
---|
1241 | // only when it is an user thread |
---|
1242 | thread_t * this = CURRENT_THREAD; |
---|
1243 | if( this->type == THREAD_USER ) |
---|
1244 | { |
---|
1245 | thread_block( this , THREAD_BLOCKED_GLOBAL ); |
---|
1246 | hal_atomic_or( &this->flags , THREAD_FLAG_REQ_DELETE ); |
---|
1247 | } |
---|
1248 | |
---|
1249 | // activate new thread |
---|
1250 | thread_unblock( XPTR( local_cxy , new_thread ) , THREAD_BLOCKED_GLOBAL ); |
---|
1251 | |
---|
1252 | hal_fence(); |
---|
1253 | |
---|
1254 | exec_dmsg("\n[DBG] %s : core[%x,%d] exit for path = %s / cycle %d\n", |
---|
1255 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, path , (uint32_t)hal_get_cycles() ); |
---|
1256 | |
---|
1257 | return 0; |
---|
1258 | |
---|
1259 | } // end process_make_exec() |
---|
1260 | |
---|
1261 | /////////////////////////////////////// |
---|
1262 | void process_make_kill( pid_t pid, |
---|
1263 | uint32_t sig_id ) |
---|
1264 | { |
---|
1265 | // this function must be executed by a thread running in owner cluster |
---|
1266 | assert( (CXY_FROM_PID( pid ) == local_cxy) , __FUNCTION__ , |
---|
1267 | "must execute in owner cluster" ); |
---|
1268 | |
---|
1269 | thread_t * this = CURRENT_THREAD; |
---|
1270 | |
---|
1271 | kill_dmsg("\n[DBG] %s : core[%x,%d] enter / process %x / sig %d\n", |
---|
1272 | __FUNCTION__, local_cxy, this->core->lid, pid , sig_id ); |
---|
1273 | |
---|
1274 | // get pointer on local target process descriptor |
---|
1275 | process_t * process = process_get_local_copy( pid ); |
---|
1276 | |
---|
1277 | // does nothing if process does not exist |
---|
1278 | if( process == NULL ) |
---|
1279 | { |
---|
1280 | printk("\n[WARNING] %s : process %x does not exist => do nothing\n", |
---|
1281 | __FUNCTION__ , pid ); |
---|
1282 | return; |
---|
1283 | } |
---|
1284 | |
---|
1285 | // analyse signal type |
---|
1286 | switch( sig_id ) |
---|
1287 | { |
---|
1288 | case SIGSTOP: |
---|
1289 | { |
---|
1290 | // block all threads in all clusters |
---|
1291 | process_sigaction( process , BLOCK_ALL_THREADS ); |
---|
1292 | |
---|
1293 | // remove TXT ownership to target process |
---|
1294 | process_txt_reset_ownership( XPTR( local_cxy , process ) ); |
---|
1295 | } |
---|
1296 | break; |
---|
1297 | case SIGCONT: // unblock all threads in all clusters |
---|
1298 | { |
---|
1299 | process_sigaction( process , UNBLOCK_ALL_THREADS ); |
---|
1300 | } |
---|
1301 | break; |
---|
1302 | case SIGKILL: // block all threads, then delete all threads |
---|
1303 | { |
---|
1304 | // block all threads in all clusters |
---|
1305 | process_sigaction( process , BLOCK_ALL_THREADS ); |
---|
1306 | |
---|
1307 | // remove TXT ownership to target process |
---|
1308 | process_txt_reset_ownership( XPTR( local_cxy , process ) ); |
---|
1309 | |
---|
1310 | // delete all threads (but the calling thread) |
---|
1311 | process_sigaction( process , DELETE_ALL_THREADS ); |
---|
1312 | |
---|
1313 | // delete the calling thread if required |
---|
1314 | if( CURRENT_THREAD->process == process ) |
---|
1315 | { |
---|
1316 | // set REQ_DELETE flag |
---|
1317 | hal_atomic_or( &this->flags , THREAD_FLAG_REQ_DELETE ); |
---|
1318 | |
---|
1319 | // deschedule |
---|
1320 | sched_yield( "suicide after kill" ); |
---|
1321 | } |
---|
1322 | } |
---|
1323 | break; |
---|
1324 | } |
---|
1325 | |
---|
1326 | kill_dmsg("\n[DBG] %s : core[%x,%d] exit / process %x / sig %d \n", |
---|
1327 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, pid , sig_id ); |
---|
1328 | |
---|
1329 | } // end process_make_kill() |
---|
1330 | |
---|
1331 | ///////////////////////////////////////// |
---|
1332 | void process_make_exit( pid_t pid, |
---|
1333 | uint32_t status ) |
---|
1334 | { |
---|
1335 | // this function must be executed by a thread running in owner cluster |
---|
1336 | assert( (CXY_FROM_PID( pid ) == local_cxy) , __FUNCTION__ , |
---|
1337 | "must execute in owner cluster" ); |
---|
1338 | |
---|
1339 | // get pointer on local process descriptor |
---|
1340 | process_t * process = process_get_local_copy( pid ); |
---|
1341 | |
---|
1342 | // does nothing if process does not exist |
---|
1343 | if( process == NULL ) |
---|
1344 | { |
---|
1345 | printk("\n[WARNING] %s : process %x does not exist => do nothing\n", |
---|
1346 | __FUNCTION__ , pid ); |
---|
1347 | return; |
---|
1348 | } |
---|
1349 | |
---|
1350 | // block all threads in all clusters (but the calling thread) |
---|
1351 | process_sigaction( process , BLOCK_ALL_THREADS ); |
---|
1352 | |
---|
1353 | // delete all threads in all clusters (but the calling thread) |
---|
1354 | process_sigaction( process , DELETE_ALL_THREADS ); |
---|
1355 | |
---|
1356 | // delete the calling thread |
---|
1357 | hal_atomic_or( &CURRENT_THREAD->flags , THREAD_FLAG_REQ_DELETE ); |
---|
1358 | |
---|
1359 | // deschedule |
---|
1360 | sched_yield( "suicide after exit" ); |
---|
1361 | |
---|
1362 | } // end process_make_exit() |
---|
1363 | |
---|
1364 | /////////////////////////////////////////////// |
---|
1365 | void process_zero_create( process_t * process ) |
---|
1366 | { |
---|
1367 | |
---|
1368 | process_dmsg("\n[DBG] %s : core[%x,%d] enter at cycle %d\n", |
---|
1369 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, (uint32_t)hal_get_cycles() ); |
---|
1370 | |
---|
1371 | // initialize PID, REF_XP, PARENT_XP, and STATE |
---|
1372 | process->pid = 0; |
---|
1373 | process->ref_xp = XPTR( local_cxy , process ); |
---|
1374 | process->parent_xp = XPTR_NULL; |
---|
1375 | process->state = PROCESS_STATE_RUNNING; |
---|
1376 | |
---|
1377 | // reset th_tbl[] array as empty |
---|
1378 | uint32_t i; |
---|
1379 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
---|
1380 | { |
---|
1381 | process->th_tbl[i] = NULL; |
---|
1382 | } |
---|
1383 | process->th_nr = 0; |
---|
1384 | spinlock_init( &process->th_lock ); |
---|
1385 | |
---|
1386 | // reset children list as empty |
---|
1387 | xlist_root_init( XPTR( local_cxy , &process->children_root ) ); |
---|
1388 | remote_spinlock_init( XPTR( local_cxy , &process->children_lock ) ); |
---|
1389 | process->children_nr = 0; |
---|
1390 | |
---|
1391 | hal_fence(); |
---|
1392 | |
---|
1393 | process_dmsg("\n[DBG] %s : core[%x,%d] exit at cycle %d\n", |
---|
1394 | __FUNCTION__ , local_cxy , CURRENT_THREAD->core->lid , (uint32_t)hal_get_cycles() ); |
---|
1395 | |
---|
1396 | } // end process_zero_init() |
---|
1397 | |
---|
1398 | ////////////////////////// |
---|
1399 | void process_init_create() |
---|
1400 | { |
---|
1401 | process_t * process; // local pointer on process descriptor |
---|
1402 | pid_t pid; // process_init identifier |
---|
1403 | thread_t * thread; // local pointer on main thread |
---|
1404 | pthread_attr_t attr; // main thread attributes |
---|
1405 | lid_t lid; // selected core local index for main thread |
---|
1406 | error_t error; |
---|
1407 | |
---|
1408 | process_dmsg("\n[DBG] %s : core[%x,%d] enters at cycle %d\n", |
---|
1409 | __FUNCTION__ , local_cxy, CURRENT_THREAD->core->lid ); |
---|
1410 | |
---|
1411 | // allocates memory for process descriptor from local cluster |
---|
1412 | process = process_alloc(); |
---|
1413 | if( process == NULL ) |
---|
1414 | { |
---|
1415 | printk("\n[PANIC] in %s : no memory for process descriptor in cluster %x\n", |
---|
1416 | __FUNCTION__, local_cxy ); |
---|
1417 | } |
---|
1418 | |
---|
1419 | // get PID from local cluster |
---|
1420 | error = cluster_pid_alloc( process , &pid ); |
---|
1421 | if( error ) |
---|
1422 | { |
---|
1423 | printk("\n[PANIC] in %s : cannot allocate PID in cluster %x\n", |
---|
1424 | __FUNCTION__, local_cxy ); |
---|
1425 | process_free( process ); |
---|
1426 | } |
---|
1427 | |
---|
1428 | // check allocated PID |
---|
1429 | assert( (pid == 1) , __FUNCTION__ , "process INIT must be first process in cluster 0\n" ); |
---|
1430 | |
---|
1431 | // initialize process descriptor / parent is local process_zero |
---|
1432 | process_reference_init( process, |
---|
1433 | pid, |
---|
1434 | XPTR( local_cxy , &process_zero ), // parent |
---|
1435 | XPTR( local_cxy , &process_zero ) ); // model |
---|
1436 | |
---|
1437 | process_dmsg("\n[DBG] %s : core[%x,%d] / initialisation done\n", |
---|
1438 | __FUNCTION__ , local_cxy, CURRENT_THREAD->core->lid ); |
---|
1439 | |
---|
1440 | // register "code" and "data" vsegs as well as entry-point |
---|
1441 | // in process VMM, using information contained in the elf file. |
---|
1442 | if( elf_load_process( CONFIG_PROCESS_INIT_PATH , process ) ) |
---|
1443 | { |
---|
1444 | printk("\n[PANIC] in %s : cannot access .elf file / path = %s\n", |
---|
1445 | __FUNCTION__, CONFIG_PROCESS_INIT_PATH ); |
---|
1446 | process_destroy( process ); |
---|
1447 | } |
---|
1448 | |
---|
1449 | process_dmsg("\n[DBG] %s : core[%x,%d] vsegs registered / path = %s\n", |
---|
1450 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, CONFIG_PROCESS_INIT_PATH ); |
---|
1451 | |
---|
1452 | // get extended pointers on process_zero children_root, children_lock |
---|
1453 | xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root ); |
---|
1454 | xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock ); |
---|
1455 | |
---|
1456 | // register process INIT in parent local process_zero |
---|
1457 | remote_spinlock_lock( children_lock_xp ); |
---|
1458 | xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) ); |
---|
1459 | hal_atomic_add( &process_zero.children_nr , 1 ); |
---|
1460 | remote_spinlock_unlock( children_lock_xp ); |
---|
1461 | |
---|
1462 | // select a core in local cluster to execute the main thread |
---|
1463 | lid = cluster_select_local_core(); |
---|
1464 | |
---|
1465 | // initialize pthread attributes for main thread |
---|
1466 | attr.attributes = PT_ATTR_DETACH | PT_ATTR_CLUSTER_DEFINED | PT_ATTR_CORE_DEFINED; |
---|
1467 | attr.cxy = local_cxy; |
---|
1468 | attr.lid = lid; |
---|
1469 | |
---|
1470 | // create and initialize thread descriptor |
---|
1471 | error = thread_user_create( pid, |
---|
1472 | (void *)process->vmm.entry_point, |
---|
1473 | NULL, |
---|
1474 | &attr, |
---|
1475 | &thread ); |
---|
1476 | if( error ) |
---|
1477 | { |
---|
1478 | printk("\n[PANIC] in %s : cannot create main thread / path = %s\n", |
---|
1479 | __FUNCTION__, CONFIG_PROCESS_INIT_PATH ); |
---|
1480 | process_destroy( process ); |
---|
1481 | } |
---|
1482 | |
---|
1483 | // check main thread index |
---|
1484 | assert( (thread->trdid == 0) , __FUNCTION__ , "main thread must have index 0\n" ); |
---|
1485 | |
---|
1486 | // activate thread |
---|
1487 | thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL ); |
---|
1488 | |
---|
1489 | hal_fence(); |
---|
1490 | |
---|
1491 | process_dmsg("\n[DBG] %s : core[%x,%d] exit / main thread = %x\n", |
---|
1492 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, thread ); |
---|
1493 | |
---|
1494 | } // end process_init_create() |
---|
1495 | |
---|
1496 | ////////////////////////////////////////// |
---|
1497 | char * process_state_str( uint32_t state ) |
---|
1498 | { |
---|
1499 | if ( state == PROCESS_STATE_RUNNING ) return "RUNNING"; |
---|
1500 | else if( state == PROCESS_STATE_KILLED ) return "KILLED"; |
---|
1501 | else if( state == PROCESS_STATE_EXITED ) return "EXITED"; |
---|
1502 | else return "undefined"; |
---|
1503 | } |
---|
1504 | |
---|
1505 | ///////////////////////////////////////// |
---|
1506 | void process_display( xptr_t process_xp ) |
---|
1507 | { |
---|
1508 | process_t * process_ptr; |
---|
1509 | cxy_t process_cxy; |
---|
1510 | xptr_t parent_xp; // extended pointer on parent process |
---|
1511 | process_t * parent_ptr; |
---|
1512 | cxy_t parent_cxy; |
---|
1513 | |
---|
1514 | pid_t pid; |
---|
1515 | pid_t ppid; |
---|
1516 | uint32_t state; |
---|
1517 | xptr_t ref_xp; |
---|
1518 | uint32_t th_nr; |
---|
1519 | |
---|
1520 | xptr_t txt_file_xp; // extended pointer on TXT_RX pseudo file |
---|
1521 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1522 | chdev_t * chdev_ptr; |
---|
1523 | cxy_t chdev_cxy; |
---|
1524 | xptr_t owner_xp; // extended pointer on TXT owner process |
---|
1525 | |
---|
1526 | xptr_t elf_file_xp; // extended pointer on .elf file |
---|
1527 | cxy_t elf_file_cxy; |
---|
1528 | vfs_file_t * elf_file_ptr; |
---|
1529 | vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode |
---|
1530 | |
---|
1531 | char txt_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1532 | char elf_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1533 | |
---|
1534 | // get cluster and local pointer on process |
---|
1535 | process_ptr = GET_PTR( process_xp ); |
---|
1536 | process_cxy = GET_CXY( process_xp ); |
---|
1537 | |
---|
1538 | // check reference process |
---|
1539 | ref_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->ref_xp ) ); |
---|
1540 | assert( (process_xp == ref_xp) , __FUNCTION__ , "process is not the reference\n"); |
---|
1541 | |
---|
1542 | // get PID and state |
---|
1543 | pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
1544 | state = hal_remote_lw( XPTR( process_cxy , &process_ptr->state ) ); |
---|
1545 | |
---|
1546 | // get PPID |
---|
1547 | parent_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->parent_xp ) ); |
---|
1548 | parent_cxy = GET_CXY( parent_xp ); |
---|
1549 | parent_ptr = GET_PTR( parent_xp ); |
---|
1550 | ppid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
1551 | |
---|
1552 | // get number of threads |
---|
1553 | th_nr = hal_remote_lw( XPTR( process_cxy , &process_ptr->th_nr ) ); |
---|
1554 | |
---|
1555 | // get TXT name and process owner |
---|
1556 | txt_file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
1557 | |
---|
1558 | assert( (txt_file_xp != XPTR_NULL) , __FUNCTION__ , |
---|
1559 | "process must be attached to one TXT terminal\n" ); |
---|
1560 | |
---|
1561 | chdev_xp = chdev_from_file( txt_file_xp ); |
---|
1562 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1563 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
1564 | hal_remote_strcpy( XPTR( local_cxy , txt_name ) , |
---|
1565 | XPTR( chdev_cxy , chdev_ptr->name ) ); |
---|
1566 | owner_xp = (xptr_t)hal_remote_lwd( XPTR( chdev_cxy , &chdev_ptr->ext.txt.owner_xp ) ); |
---|
1567 | |
---|
1568 | // get process .elf name |
---|
1569 | elf_file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) ); |
---|
1570 | |
---|
1571 | elf_file_cxy = GET_CXY( elf_file_xp ); |
---|
1572 | elf_file_ptr = (vfs_file_t *)GET_PTR( elf_file_xp ); |
---|
1573 | elf_inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) ); |
---|
1574 | vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name ); |
---|
1575 | |
---|
1576 | // display process info |
---|
1577 | if( owner_xp == process_xp ) |
---|
1578 | { |
---|
1579 | printk("PID %X | PPID %X | %s\t| %s (FG) | %X | %d | %s\n", |
---|
1580 | pid, ppid, process_state_str(state), txt_name, process_ptr, th_nr, elf_name ); |
---|
1581 | } |
---|
1582 | else |
---|
1583 | { |
---|
1584 | printk("PID %X | PPID %X | %s\t| %s (BG) | %X | %d | %s\n", |
---|
1585 | pid, ppid, process_state_str(state), txt_name, process_ptr, th_nr, elf_name ); |
---|
1586 | } |
---|
1587 | } // end process_display() |
---|
1588 | |
---|
1589 | |
---|
1590 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
1591 | // Terminals related functions |
---|
1592 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
1593 | |
---|
1594 | //////////////////////////// |
---|
1595 | uint32_t process_txt_alloc() |
---|
1596 | { |
---|
1597 | uint32_t index; // TXT terminal index |
---|
1598 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1599 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
1600 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
1601 | xptr_t root_xp; // extended pointer on owner field in chdev |
---|
1602 | |
---|
1603 | // scan the user TXT_RX chdevs (TXT0 is reserved for kernel) |
---|
1604 | for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ ) |
---|
1605 | { |
---|
1606 | // get pointers on TXT_RX[index] |
---|
1607 | chdev_xp = chdev_dir.txt_rx[index]; |
---|
1608 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1609 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
1610 | |
---|
1611 | // get extended pointer on root of attached process |
---|
1612 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
1613 | |
---|
1614 | // return free TXT index if found |
---|
1615 | if( xlist_is_empty( root_xp ) ) return index; |
---|
1616 | } |
---|
1617 | |
---|
1618 | assert( false , __FUNCTION__ , "no free TXT terminal found" ); |
---|
1619 | |
---|
1620 | return -1; |
---|
1621 | |
---|
1622 | } // end process_txt_alloc() |
---|
1623 | |
---|
1624 | ///////////////////////////////////////////// |
---|
1625 | void process_txt_attach( process_t * process, |
---|
1626 | uint32_t txt_id ) |
---|
1627 | { |
---|
1628 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1629 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
1630 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
1631 | xptr_t root_xp; // extended pointer on list root in chdev |
---|
1632 | xptr_t lock_xp; // extended pointer on list lock in chdev |
---|
1633 | |
---|
1634 | process_dmsg("\n[DBG] %s : core[%x,%d] enter for process %x at cycle\n", |
---|
1635 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, process->pid, (uint32_t)hal_get_cycles() ); |
---|
1636 | |
---|
1637 | // check process is reference |
---|
1638 | assert( (process->ref_xp == XPTR( local_cxy , process )) , __FUNCTION__ , |
---|
1639 | "process is not the reference descriptor" ); |
---|
1640 | |
---|
1641 | // check terminal index |
---|
1642 | assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) , |
---|
1643 | __FUNCTION__ , "illegal TXT terminal index" ); |
---|
1644 | |
---|
1645 | // get pointers on TXT_RX[txt_id] chdev |
---|
1646 | chdev_xp = chdev_dir.txt_rx[txt_id]; |
---|
1647 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1648 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
1649 | |
---|
1650 | // get extended pointer on root & lock of attached process list |
---|
1651 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
1652 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
1653 | |
---|
1654 | // insert process in attached process list |
---|
1655 | remote_spinlock_lock( lock_xp ); |
---|
1656 | xlist_add_last( root_xp , XPTR( local_cxy , &process->txt_list ) ); |
---|
1657 | remote_spinlock_unlock( lock_xp ); |
---|
1658 | |
---|
1659 | process_dmsg("\n[DBG] %s : core[%x,%d] exit for process %x at cycle\n", |
---|
1660 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, process->pid, (uint32_t)hal_get_cycles() ); |
---|
1661 | |
---|
1662 | } // end process_txt_attach() |
---|
1663 | |
---|
1664 | ////////////////////////////////////////////// |
---|
1665 | void process_txt_detach( process_t * process ) |
---|
1666 | { |
---|
1667 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1668 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
1669 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
1670 | xptr_t lock_xp; // extended pointer on list lock in chdev |
---|
1671 | |
---|
1672 | process_dmsg("\n[DBG] %s : core[%x,%d] enter for process %x at cycle\n", |
---|
1673 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, process->pid, (uint32_t)hal_get_cycles() ); |
---|
1674 | |
---|
1675 | // check process is reference |
---|
1676 | assert( (process->ref_xp == XPTR( local_cxy , process )) , __FUNCTION__ , |
---|
1677 | "process is not the reference descriptor" ); |
---|
1678 | |
---|
1679 | // get extended pointer on TXT_RX chdev |
---|
1680 | chdev_xp = chdev_from_file( process->fd_array.array[0] ); |
---|
1681 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1682 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
1683 | |
---|
1684 | // get extended pointer on lock of attached process list |
---|
1685 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
1686 | |
---|
1687 | // unlink process from attached process list |
---|
1688 | remote_spinlock_lock( lock_xp ); |
---|
1689 | xlist_unlink( XPTR( local_cxy , &process->txt_list ) ); |
---|
1690 | remote_spinlock_unlock( lock_xp ); |
---|
1691 | |
---|
1692 | process_dmsg("\n[DBG] %s : core[%x,%d] exit for process %x at cycle %d\n", |
---|
1693 | __FUNCTION__, local_cxy, CURRENT_THREAD->core->lid, process->pid, (uint32_t)hal_get_cycles() ); |
---|
1694 | |
---|
1695 | } // end process_txt_detach() |
---|
1696 | |
---|
1697 | /////////////////////////////////////////////////// |
---|
1698 | void process_txt_set_ownership( xptr_t process_xp ) |
---|
1699 | { |
---|
1700 | process_t * process_ptr; |
---|
1701 | cxy_t process_cxy; |
---|
1702 | xptr_t file_xp; |
---|
1703 | xptr_t txt_xp; |
---|
1704 | chdev_t * txt_ptr; |
---|
1705 | cxy_t txt_cxy; |
---|
1706 | |
---|
1707 | // get cluster and local pointer on process |
---|
1708 | process_cxy = GET_CXY( process_xp ); |
---|
1709 | process_ptr = (process_t *)GET_PTR( process_xp ); |
---|
1710 | |
---|
1711 | // get extended pointer on stdin pseudo file |
---|
1712 | file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
1713 | |
---|
1714 | // get pointers on TXT chdev |
---|
1715 | txt_xp = chdev_from_file( file_xp ); |
---|
1716 | txt_cxy = GET_CXY( txt_xp ); |
---|
1717 | txt_ptr = (chdev_t *)GET_PTR( txt_xp ); |
---|
1718 | |
---|
1719 | // set owner field in TXT chdev |
---|
1720 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp ); |
---|
1721 | |
---|
1722 | } // end process_txt_set ownership() |
---|
1723 | |
---|
1724 | ///////////////////////////////////////////////////// |
---|
1725 | void process_txt_reset_ownership( xptr_t process_xp ) |
---|
1726 | { |
---|
1727 | process_t * process_ptr; |
---|
1728 | cxy_t process_cxy; |
---|
1729 | xptr_t parent_xp; // extended pointer on parent process |
---|
1730 | process_t * parent_ptr; |
---|
1731 | cxy_t parent_cxy; |
---|
1732 | xptr_t file_xp; // extended pointer on TXT_RX pseudo file |
---|
1733 | xptr_t txt_xp; // extended pointer on TXT_RX chdev |
---|
1734 | chdev_t * txt_ptr; |
---|
1735 | cxy_t txt_cxy; |
---|
1736 | xptr_t owner_xp; // extended pointer on current TXT_RX owner |
---|
1737 | xptr_t root_xp; // extended pointer on root of attached process list |
---|
1738 | xptr_t iter_xp; // iterator for xlist |
---|
1739 | xptr_t current_xp; // extended pointer on current process |
---|
1740 | process_t * current_ptr; |
---|
1741 | cxy_t current_cxy; |
---|
1742 | pid_t ppid; |
---|
1743 | |
---|
1744 | // get cluster and local pointer on process |
---|
1745 | process_cxy = GET_CXY( process_xp ); |
---|
1746 | process_ptr = (process_t *)GET_PTR( process_xp ); |
---|
1747 | |
---|
1748 | // get extended pointer on stdin pseudo file |
---|
1749 | file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
1750 | |
---|
1751 | // get pointers on TXT chdev |
---|
1752 | txt_xp = chdev_from_file( file_xp ); |
---|
1753 | txt_cxy = GET_CXY( txt_xp ); |
---|
1754 | txt_ptr = (chdev_t *)GET_PTR( txt_xp ); |
---|
1755 | |
---|
1756 | // get extended pointer on TXT_RX owner |
---|
1757 | owner_xp = hal_remote_lwd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) ); |
---|
1758 | |
---|
1759 | // transfer ownership to KSH if required |
---|
1760 | if( owner_xp == process_xp ) |
---|
1761 | { |
---|
1762 | // get extended pointer on root of list of attached processes |
---|
1763 | root_xp = hal_remote_lwd( XPTR( txt_cxy , &txt_ptr->ext.txt.root ) ); |
---|
1764 | |
---|
1765 | // scan attached process list to find KSH process |
---|
1766 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
1767 | { |
---|
1768 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
1769 | current_cxy = GET_CXY( current_xp ); |
---|
1770 | current_ptr = GET_PTR( current_xp ); |
---|
1771 | parent_xp = hal_remote_lwd( XPTR( current_cxy , ¤t_ptr->parent_xp ) ); |
---|
1772 | |
---|
1773 | parent_cxy = GET_CXY( parent_xp ); |
---|
1774 | parent_ptr = GET_PTR( parent_xp ); |
---|
1775 | ppid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
1776 | |
---|
1777 | if( ppid == 1 ) // current is KSH |
---|
1778 | { |
---|
1779 | // set owner field in TXT chdev |
---|
1780 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp ); |
---|
1781 | return; |
---|
1782 | } |
---|
1783 | } |
---|
1784 | } |
---|
1785 | |
---|
1786 | assert( false , __FUNCTION__ , "KSH process not found" ); |
---|
1787 | |
---|
1788 | } // end process_txt_reset_ownership() |
---|
1789 | |
---|
1790 | |
---|
1791 | |
---|