1 | /* |
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2 | * process.c - process related functions definition. |
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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 (2016,2017,2018,2019) |
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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_kernel_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 <busylock.h> |
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46 | #include <queuelock.h> |
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47 | #include <remote_queuelock.h> |
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48 | #include <rwlock.h> |
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49 | #include <remote_rwlock.h> |
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50 | #include <dqdt.h> |
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51 | #include <cluster.h> |
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52 | #include <ppm.h> |
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53 | #include <boot_info.h> |
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54 | #include <process.h> |
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55 | #include <elf.h> |
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56 | #include <syscalls.h> |
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57 | #include <shared_syscalls.h> |
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58 | |
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59 | ////////////////////////////////////////////////////////////////////////////////////////// |
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60 | // Extern global variables |
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61 | ////////////////////////////////////////////////////////////////////////////////////////// |
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62 | |
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63 | extern process_t process_zero; // allocated in kernel_init.c |
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64 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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65 | |
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66 | ////////////////////////////////////////////////////////////////////////////////////////// |
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67 | // Process initialisation related functions |
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68 | ////////////////////////////////////////////////////////////////////////////////////////// |
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69 | |
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70 | ///////////////////////////////// |
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71 | process_t * process_alloc( void ) |
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72 | { |
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73 | kmem_req_t req; |
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74 | |
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75 | req.type = KMEM_PROCESS; |
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76 | req.size = sizeof(process_t); |
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77 | req.flags = AF_KERNEL; |
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78 | |
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79 | return (process_t *)kmem_alloc( &req ); |
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80 | } |
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81 | |
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82 | //////////////////////////////////////// |
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83 | void process_free( process_t * process ) |
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84 | { |
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85 | kmem_req_t req; |
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86 | |
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87 | req.type = KMEM_PROCESS; |
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88 | req.ptr = process; |
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89 | kmem_free( &req ); |
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90 | } |
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91 | |
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92 | ///////////////////////////////////////////////// |
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93 | void process_reference_init( process_t * process, |
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94 | pid_t pid, |
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95 | xptr_t parent_xp ) |
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96 | { |
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97 | xptr_t process_xp; |
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98 | cxy_t parent_cxy; |
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99 | process_t * parent_ptr; |
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100 | xptr_t stdin_xp; |
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101 | xptr_t stdout_xp; |
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102 | xptr_t stderr_xp; |
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103 | uint32_t stdin_id; |
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104 | uint32_t stdout_id; |
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105 | uint32_t stderr_id; |
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106 | error_t error; |
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107 | uint32_t txt_id; |
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108 | char rx_path[40]; |
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109 | char tx_path[40]; |
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110 | xptr_t file_xp; |
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111 | xptr_t chdev_xp; |
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112 | chdev_t * chdev_ptr; |
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113 | cxy_t chdev_cxy; |
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114 | pid_t parent_pid; |
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115 | |
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116 | // build extended pointer on this reference process |
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117 | process_xp = XPTR( local_cxy , process ); |
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118 | |
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119 | // get parent process cluster and local pointer |
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120 | parent_cxy = GET_CXY( parent_xp ); |
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121 | parent_ptr = GET_PTR( parent_xp ); |
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122 | |
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123 | // get parent_pid |
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124 | parent_pid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) ); |
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125 | |
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126 | #if DEBUG_PROCESS_REFERENCE_INIT |
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127 | thread_t * this = CURRENT_THREAD; |
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128 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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129 | if( DEBUG_PROCESS_REFERENCE_INIT < cycle ) |
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130 | printk("\n[%s] thread[%x,%x] enter to initalialize process %x / cycle %d\n", |
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131 | __FUNCTION__, parent_pid, this->trdid, pid, cycle ); |
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132 | #endif |
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133 | |
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134 | // initialize pid, ref_xp, parent_xp, owner_xp, term_state fields |
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135 | process->pid = pid; |
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136 | process->ref_xp = XPTR( local_cxy , process ); |
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137 | process->owner_xp = XPTR( local_cxy , process ); |
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138 | process->parent_xp = parent_xp; |
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139 | process->term_state = 0; |
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140 | |
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141 | // initialize VFS root inode and CWD inode |
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142 | process->vfs_root_xp = hal_remote_l64( XPTR( parent_cxy, &parent_ptr->vfs_root_xp ) ); |
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143 | process->cwd_xp = hal_remote_l64( XPTR( parent_cxy, &parent_ptr->cwd_xp ) ); |
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144 | |
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145 | // initialize vmm as empty |
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146 | error = vmm_init( process ); |
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147 | |
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148 | assert( (error == 0) , "cannot initialize VMM\n" ); |
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149 | |
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150 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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151 | cycle = (uint32_t)hal_get_cycles(); |
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152 | if( DEBUG_PROCESS_REFERENCE_INIT < cycle ) |
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153 | printk("\n[%s] thread[%x,%x] / vmm empty for process %x / cycle %d\n", |
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154 | __FUNCTION__, parent_pid, this->trdid, pid, cycle ); |
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155 | #endif |
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156 | |
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157 | // initialize fd_array as empty |
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158 | process_fd_init( process ); |
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159 | |
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160 | // define the stdin/stdout/stderr pseudo files <=> select a TXT terminal. |
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161 | if( (pid == 1) || (parent_pid == 1) ) // INIT or KSH process |
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162 | { |
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163 | // select a TXT channel |
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164 | if( pid == 1 ) txt_id = 0; // INIT |
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165 | else txt_id = process_txt_alloc(); // KSH |
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166 | |
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167 | // attach process to TXT |
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168 | process_txt_attach( process , txt_id ); |
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169 | |
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170 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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171 | cycle = (uint32_t)hal_get_cycles(); |
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172 | if( DEBUG_PROCESS_REFERENCE_INIT < cycle ) |
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173 | printk("\n[%s] thread[%x,%x] / process %x attached to TXT%d / cycle %d\n", |
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174 | __FUNCTION__, parent_pid, this->trdid, pid, txt_id, cycle ); |
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175 | #endif |
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176 | // build path to TXT_RX[i] and TXT_TX[i] chdevs |
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177 | snprintf( rx_path , 40 , "/dev/external/txt%d_rx", txt_id ); |
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178 | snprintf( tx_path , 40 , "/dev/external/txt%d_tx", txt_id ); |
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179 | |
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180 | // create stdin pseudo file |
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181 | error = vfs_open( process->vfs_root_xp, |
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182 | rx_path, |
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183 | process_xp, |
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184 | O_RDONLY, |
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185 | 0, // FIXME chmod |
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186 | &stdin_xp, |
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187 | &stdin_id ); |
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188 | |
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189 | assert( (error == 0) , "cannot open stdin pseudo file" ); |
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190 | assert( (stdin_id == 0) , "stdin index must be 0" ); |
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191 | |
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192 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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193 | cycle = (uint32_t)hal_get_cycles(); |
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194 | if( DEBUG_PROCESS_REFERENCE_INIT < cycle ) |
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195 | printk("\n[%s] thread[%x,%x] / stdin open for process %x / cycle %d\n", |
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196 | __FUNCTION__, parent_pid, this->trdid, pid, cycle ); |
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197 | #endif |
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198 | |
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199 | // create stdout pseudo file |
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200 | error = vfs_open( process->vfs_root_xp, |
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201 | tx_path, |
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202 | process_xp, |
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203 | O_WRONLY, |
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204 | 0, // FIXME chmod |
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205 | &stdout_xp, |
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206 | &stdout_id ); |
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207 | |
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208 | assert( (error == 0) , "cannot open stdout pseudo file" ); |
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209 | assert( (stdout_id == 1) , "stdout index must be 1" ); |
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210 | |
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211 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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212 | cycle = (uint32_t)hal_get_cycles(); |
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213 | if( DEBUG_PROCESS_REFERENCE_INIT < cycle ) |
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214 | printk("\n[%s] thread[%x,%x] / stdout open for process %x / cycle %d\n", |
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215 | __FUNCTION__, parent_pid, this->trdid, pid, cycle ); |
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216 | #endif |
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217 | |
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218 | // create stderr pseudo file |
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219 | error = vfs_open( process->vfs_root_xp, |
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220 | tx_path, |
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221 | process_xp, |
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222 | O_WRONLY, |
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223 | 0, // FIXME chmod |
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224 | &stderr_xp, |
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225 | &stderr_id ); |
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226 | |
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227 | assert( (error == 0) , "cannot open stderr pseudo file" ); |
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228 | assert( (stderr_id == 2) , "stderr index must be 2" ); |
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229 | |
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230 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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231 | cycle = (uint32_t)hal_get_cycles(); |
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232 | if( DEBUG_PROCESS_REFERENCE_INIT < cycle ) |
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233 | printk("\n[%s] thread[%x,%x] / stderr open for process %x / cycle %d\n", |
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234 | __FUNCTION__, parent_pid, this->trdid, pid, cycle ); |
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235 | #endif |
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236 | |
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237 | } |
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238 | else // normal user process |
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239 | { |
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240 | // get extended pointer on stdin pseudo file in parent process |
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241 | file_xp = (xptr_t)hal_remote_l64( XPTR( parent_cxy , &parent_ptr->fd_array.array[0] ) ); |
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242 | |
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243 | // get extended pointer on parent process TXT chdev |
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244 | chdev_xp = chdev_from_file( file_xp ); |
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245 | |
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246 | // get cluster and local pointer on chdev |
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247 | chdev_cxy = GET_CXY( chdev_xp ); |
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248 | chdev_ptr = GET_PTR( chdev_xp ); |
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249 | |
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250 | // get parent process TXT terminal index |
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251 | txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) ); |
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252 | |
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253 | // attach child process to parent process TXT terminal |
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254 | process_txt_attach( process , txt_id ); |
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255 | |
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256 | // copy all open files from parent process fd_array to this process |
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257 | process_fd_remote_copy( XPTR( local_cxy , &process->fd_array ), |
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258 | XPTR( parent_cxy , &parent_ptr->fd_array ) ); |
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259 | } |
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260 | |
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261 | // initialize lock protecting CWD changes |
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262 | remote_busylock_init( XPTR( local_cxy , &process->cwd_lock ), LOCK_PROCESS_CWD ); |
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263 | |
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264 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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265 | cycle = (uint32_t)hal_get_cycles(); |
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266 | if( DEBUG_PROCESS_REFERENCE_INIT < cycle ) |
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267 | printk("\n[%s] thread[%x,%x] / set fd_array for process %x / cycle %d\n", |
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268 | __FUNCTION__, parent_pid, this->trdid, pid , cycle ); |
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269 | #endif |
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270 | |
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271 | // reset children list root |
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272 | xlist_root_init( XPTR( local_cxy , &process->children_root ) ); |
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273 | process->children_nr = 0; |
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274 | remote_queuelock_init( XPTR( local_cxy , &process->children_lock ), LOCK_PROCESS_CHILDREN ); |
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275 | |
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276 | // reset semaphore / mutex / barrier / condvar list roots and lock |
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277 | xlist_root_init( XPTR( local_cxy , &process->sem_root ) ); |
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278 | xlist_root_init( XPTR( local_cxy , &process->mutex_root ) ); |
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279 | xlist_root_init( XPTR( local_cxy , &process->barrier_root ) ); |
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280 | xlist_root_init( XPTR( local_cxy , &process->condvar_root ) ); |
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281 | remote_queuelock_init( XPTR( local_cxy , &process->sync_lock ), LOCK_PROCESS_USERSYNC ); |
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282 | |
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283 | // reset open directories root and lock |
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284 | xlist_root_init( XPTR( local_cxy , &process->dir_root ) ); |
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285 | remote_queuelock_init( XPTR( local_cxy , &process->dir_lock ), LOCK_PROCESS_DIR ); |
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286 | |
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287 | // register new process in the local cluster manager pref_tbl[] |
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288 | lpid_t lpid = LPID_FROM_PID( pid ); |
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289 | LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process ); |
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290 | |
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291 | // register new process descriptor in local cluster manager local_list |
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292 | cluster_process_local_link( process ); |
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293 | |
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294 | // register new process descriptor in local cluster manager copies_list |
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295 | cluster_process_copies_link( process ); |
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296 | |
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297 | // initialize th_tbl[] array and associated threads |
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298 | uint32_t i; |
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299 | |
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300 | for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ ) |
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301 | { |
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302 | process->th_tbl[i] = NULL; |
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303 | } |
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304 | process->th_nr = 0; |
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305 | rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL ); |
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306 | |
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307 | hal_fence(); |
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308 | |
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309 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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310 | cycle = (uint32_t)hal_get_cycles(); |
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311 | if( DEBUG_PROCESS_REFERENCE_INIT < cycle ) |
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312 | printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n", |
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313 | __FUNCTION__, parent_pid, this->trdid, pid, cycle ); |
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314 | #endif |
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315 | |
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316 | } // process_reference_init() |
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317 | |
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318 | ///////////////////////////////////////////////////// |
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319 | error_t process_copy_init( process_t * local_process, |
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320 | xptr_t reference_process_xp ) |
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321 | { |
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322 | error_t error; |
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323 | |
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324 | // get reference process cluster and local pointer |
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325 | cxy_t ref_cxy = GET_CXY( reference_process_xp ); |
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326 | process_t * ref_ptr = GET_PTR( reference_process_xp ); |
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327 | |
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328 | // initialize PID, REF_XP, PARENT_XP, and STATE |
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329 | local_process->pid = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->pid ) ); |
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330 | local_process->parent_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->parent_xp ) ); |
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331 | local_process->ref_xp = reference_process_xp; |
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332 | local_process->owner_xp = reference_process_xp; |
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333 | local_process->term_state = 0; |
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334 | |
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335 | #if DEBUG_PROCESS_COPY_INIT |
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336 | thread_t * this = CURRENT_THREAD; |
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337 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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338 | if( DEBUG_PROCESS_COPY_INIT < cycle ) |
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339 | printk("\n[%s] thread[%x,%x] enter for process %x / cycle %d\n", |
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340 | __FUNCTION__, this->process->pid, this->trdid, local_process->pid, cycle ); |
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341 | #endif |
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342 | |
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343 | // check user process |
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344 | assert( (local_process->pid != 0), "PID cannot be 0" ); |
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345 | |
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346 | // reset local process vmm |
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347 | error = vmm_init( local_process ); |
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348 | assert( (error == 0) , "cannot initialize VMM\n"); |
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349 | |
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350 | // reset process file descriptors array |
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351 | process_fd_init( local_process ); |
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352 | |
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353 | // reset vfs_root_xp / vfs_bin_xp / cwd_xp fields |
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354 | local_process->vfs_root_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) ); |
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355 | local_process->vfs_bin_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) ); |
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356 | local_process->cwd_xp = XPTR_NULL; |
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357 | |
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358 | // reset children list root (not used in a process descriptor copy) |
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359 | xlist_root_init( XPTR( local_cxy , &local_process->children_root ) ); |
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360 | local_process->children_nr = 0; |
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361 | remote_queuelock_init( XPTR( local_cxy , &local_process->children_lock ), |
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362 | LOCK_PROCESS_CHILDREN ); |
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363 | |
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364 | // reset children_list (not used in a process descriptor copy) |
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365 | xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) ); |
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366 | |
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367 | // reset semaphores list root (not used in a process descriptor copy) |
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368 | xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) ); |
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369 | xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) ); |
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370 | xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) ); |
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371 | xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) ); |
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372 | |
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373 | // initialize th_tbl[] array and associated fields |
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374 | uint32_t i; |
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375 | for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ ) |
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376 | { |
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377 | local_process->th_tbl[i] = NULL; |
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378 | } |
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379 | local_process->th_nr = 0; |
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380 | rwlock_init( &local_process->th_lock , LOCK_PROCESS_THTBL ); |
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381 | |
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382 | |
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383 | // register new process descriptor in local cluster manager local_list |
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384 | cluster_process_local_link( local_process ); |
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385 | |
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386 | // register new process descriptor in owner cluster manager copies_list |
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387 | cluster_process_copies_link( local_process ); |
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388 | |
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389 | hal_fence(); |
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390 | |
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391 | #if DEBUG_PROCESS_COPY_INIT |
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392 | cycle = (uint32_t)hal_get_cycles(); |
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393 | if( DEBUG_PROCESS_COPY_INIT < cycle ) |
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394 | printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n", |
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395 | __FUNCTION__, this->process->pid, this->trdid, local_process->pid, cycle ); |
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396 | #endif |
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397 | |
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398 | return 0; |
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399 | |
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400 | } // end process_copy_init() |
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401 | |
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402 | /////////////////////////////////////////// |
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403 | void process_destroy( process_t * process ) |
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404 | { |
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405 | xptr_t parent_xp; |
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406 | process_t * parent_ptr; |
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407 | cxy_t parent_cxy; |
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408 | xptr_t children_lock_xp; |
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409 | xptr_t children_nr_xp; |
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410 | |
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411 | pid_t pid = process->pid; |
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412 | |
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413 | // check no more threads |
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414 | assert( (process->th_nr == 0), |
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415 | "process %x in cluster %x contains threads", pid , local_cxy ); |
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416 | |
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417 | #if DEBUG_PROCESS_DESTROY |
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418 | thread_t * this = CURRENT_THREAD; |
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419 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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420 | if( DEBUG_PROCESS_DESTROY < cycle ) |
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421 | printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n", |
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422 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle ); |
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423 | #endif |
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424 | |
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425 | // Destroy VMM |
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426 | vmm_destroy( process ); |
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427 | |
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428 | #if (DEBUG_PROCESS_DESTROY & 1) |
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429 | if( DEBUG_PROCESS_DESTROY < cycle ) |
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430 | printk("\n[%s] thread[%x,%x] destroyed VMM for process %x in cluster %x\n", |
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431 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy ); |
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432 | #endif |
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433 | |
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434 | // remove process from local_list in local cluster manager |
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435 | cluster_process_local_unlink( process ); |
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436 | |
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437 | #if (DEBUG_PROCESS_DESTROY & 1) |
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438 | if( DEBUG_PROCESS_DESTROY < cycle ) |
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439 | printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from local list\n", |
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440 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy ); |
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441 | #endif |
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442 | |
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443 | // remove process from copies_list in owner cluster manager |
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444 | cluster_process_copies_unlink( process ); |
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445 | |
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446 | #if (DEBUG_PROCESS_DESTROY & 1) |
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447 | if( DEBUG_PROCESS_DESTROY < cycle ) |
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448 | printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from copies list\n", |
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449 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy ); |
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450 | #endif |
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451 | |
---|
452 | // remove process from children_list |
---|
453 | // and release PID if owner cluster |
---|
454 | if( CXY_FROM_PID( pid ) == local_cxy ) |
---|
455 | { |
---|
456 | // get pointers on parent process |
---|
457 | parent_xp = process->parent_xp; |
---|
458 | parent_cxy = GET_CXY( parent_xp ); |
---|
459 | parent_ptr = GET_PTR( parent_xp ); |
---|
460 | |
---|
461 | // get extended pointer on children_lock in parent process |
---|
462 | children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock ); |
---|
463 | children_nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr ); |
---|
464 | |
---|
465 | // remove process from children_list |
---|
466 | remote_queuelock_acquire( children_lock_xp ); |
---|
467 | xlist_unlink( XPTR( local_cxy , &process->children_list ) ); |
---|
468 | hal_remote_atomic_add( children_nr_xp , -1 ); |
---|
469 | remote_queuelock_release( children_lock_xp ); |
---|
470 | |
---|
471 | #if (DEBUG_PROCESS_DESTROY & 1) |
---|
472 | if( DEBUG_PROCESS_DESTROY < cycle ) |
---|
473 | printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from children list\n", |
---|
474 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy ); |
---|
475 | #endif |
---|
476 | |
---|
477 | // release the process PID to cluster manager |
---|
478 | cluster_pid_release( pid ); |
---|
479 | |
---|
480 | #if (DEBUG_PROCESS_DESTROY & 1) |
---|
481 | if( DEBUG_PROCESS_DESTROY < cycle ) |
---|
482 | printk("\n[%s] thread[%x,%x] released process PID %x to pmgr in cluster %x\n", |
---|
483 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy ); |
---|
484 | #endif |
---|
485 | |
---|
486 | } |
---|
487 | |
---|
488 | // FIXME decrement the refcount on file pointer by vfs_bin_xp [AG] |
---|
489 | // FIXME close all open files [AG] |
---|
490 | // FIXME synchronize dirty files [AG] |
---|
491 | |
---|
492 | // release memory allocated to process descriptor |
---|
493 | process_free( process ); |
---|
494 | |
---|
495 | #if DEBUG_PROCESS_DESTROY |
---|
496 | cycle = (uint32_t)hal_get_cycles(); |
---|
497 | if( DEBUG_PROCESS_DESTROY < cycle ) |
---|
498 | printk("\n[%s] thread[%x,%x] exit / process %x in cluster %x / cycle %d\n", |
---|
499 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle ); |
---|
500 | #endif |
---|
501 | |
---|
502 | } // end process_destroy() |
---|
503 | |
---|
504 | /////////////////////////////////////////////////////////////////// |
---|
505 | const char * process_action_str( process_sigactions_t action_type ) |
---|
506 | { |
---|
507 | switch ( action_type ) |
---|
508 | { |
---|
509 | case BLOCK_ALL_THREADS: return "BLOCK"; |
---|
510 | case UNBLOCK_ALL_THREADS: return "UNBLOCK"; |
---|
511 | case DELETE_ALL_THREADS: return "DELETE"; |
---|
512 | default: return "undefined"; |
---|
513 | } |
---|
514 | } |
---|
515 | |
---|
516 | //////////////////////////////////////// |
---|
517 | void process_sigaction( pid_t pid, |
---|
518 | uint32_t type ) |
---|
519 | { |
---|
520 | cxy_t owner_cxy; // owner cluster identifier |
---|
521 | lpid_t lpid; // process index in owner cluster |
---|
522 | cluster_t * cluster; // pointer on cluster manager |
---|
523 | xptr_t root_xp; // extended pointer on root of copies |
---|
524 | xptr_t lock_xp; // extended pointer on lock protecting copies |
---|
525 | xptr_t iter_xp; // iterator on copies list |
---|
526 | xptr_t process_xp; // extended pointer on process copy |
---|
527 | cxy_t process_cxy; // process copy cluster identifier |
---|
528 | process_t * process_ptr; // local pointer on process copy |
---|
529 | reg_t save_sr; // for critical section |
---|
530 | thread_t * client; // pointer on client thread |
---|
531 | xptr_t client_xp; // extended pointer on client thread |
---|
532 | process_t * local; // pointer on process copy in local cluster |
---|
533 | uint32_t remote_nr; // number of remote process copies |
---|
534 | rpc_desc_t rpc; // shared RPC descriptor |
---|
535 | uint32_t responses; // shared RPC responses counter |
---|
536 | |
---|
537 | client = CURRENT_THREAD; |
---|
538 | client_xp = XPTR( local_cxy , client ); |
---|
539 | local = NULL; |
---|
540 | remote_nr = 0; |
---|
541 | |
---|
542 | // check calling thread can yield |
---|
543 | thread_assert_can_yield( client , __FUNCTION__ ); |
---|
544 | |
---|
545 | #if DEBUG_PROCESS_SIGACTION |
---|
546 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
547 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
548 | printk("\n[%s] thread[%x,%x] enter to %s process %x / cycle %d\n", |
---|
549 | __FUNCTION__ , client->process->pid, client->trdid, |
---|
550 | process_action_str( type ) , pid , cycle ); |
---|
551 | #endif |
---|
552 | |
---|
553 | // get pointer on local cluster manager |
---|
554 | cluster = LOCAL_CLUSTER; |
---|
555 | |
---|
556 | // get owner cluster identifier and process lpid |
---|
557 | owner_cxy = CXY_FROM_PID( pid ); |
---|
558 | lpid = LPID_FROM_PID( pid ); |
---|
559 | |
---|
560 | // get root of list of copies and lock from owner cluster |
---|
561 | root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] ); |
---|
562 | lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] ); |
---|
563 | |
---|
564 | // check action type |
---|
565 | assert( ((type == DELETE_ALL_THREADS ) || |
---|
566 | (type == BLOCK_ALL_THREADS ) || |
---|
567 | (type == UNBLOCK_ALL_THREADS )), "illegal action type" ); |
---|
568 | |
---|
569 | // This client thread send parallel RPCs to all remote clusters containing |
---|
570 | // target process copies, wait all responses, and then handles directly |
---|
571 | // the threads in local cluster, when required. |
---|
572 | // The client thread allocates a - shared - RPC descriptor in the stack, |
---|
573 | // because all parallel, non-blocking, server threads use the same input |
---|
574 | // arguments, and use the shared RPC response field |
---|
575 | |
---|
576 | // mask IRQs |
---|
577 | hal_disable_irq( &save_sr); |
---|
578 | |
---|
579 | // client thread blocks itself |
---|
580 | thread_block( client_xp , THREAD_BLOCKED_RPC ); |
---|
581 | |
---|
582 | // initialize RPC responses counter |
---|
583 | responses = 0; |
---|
584 | |
---|
585 | // initialize shared RPC descriptor |
---|
586 | // can be shared, because no out arguments |
---|
587 | rpc.rsp = &responses; |
---|
588 | rpc.blocking = false; |
---|
589 | rpc.index = RPC_PROCESS_SIGACTION; |
---|
590 | rpc.thread = client; |
---|
591 | rpc.lid = client->core->lid; |
---|
592 | rpc.args[0] = pid; |
---|
593 | rpc.args[1] = type; |
---|
594 | |
---|
595 | // take the lock protecting process copies |
---|
596 | remote_queuelock_acquire( lock_xp ); |
---|
597 | |
---|
598 | // scan list of process copies |
---|
599 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
600 | { |
---|
601 | // get extended pointers and cluster on process |
---|
602 | process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list ); |
---|
603 | process_cxy = GET_CXY( process_xp ); |
---|
604 | process_ptr = GET_PTR( process_xp ); |
---|
605 | |
---|
606 | if( process_cxy == local_cxy ) // process copy is local |
---|
607 | { |
---|
608 | local = process_ptr; |
---|
609 | } |
---|
610 | else // process copy is remote |
---|
611 | { |
---|
612 | // update number of remote process copies |
---|
613 | remote_nr++; |
---|
614 | |
---|
615 | // atomically increment RPC responses counter |
---|
616 | hal_atomic_add( &responses , 1 ); |
---|
617 | |
---|
618 | #if DEBUG_PROCESS_SIGACTION |
---|
619 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
620 | printk("\n[%s] thread[%x,%x] send RPC to cluster %x for process %x\n", |
---|
621 | __FUNCTION__, client->process->pid, client->trdid, process_cxy, pid ); |
---|
622 | #endif |
---|
623 | // call RPC in target cluster |
---|
624 | rpc_send( process_cxy , &rpc ); |
---|
625 | } |
---|
626 | } // end list of copies |
---|
627 | |
---|
628 | // release the lock protecting process copies |
---|
629 | remote_queuelock_release( lock_xp ); |
---|
630 | |
---|
631 | // restore IRQs |
---|
632 | hal_restore_irq( save_sr); |
---|
633 | |
---|
634 | // - if there is remote process copies, the client thread deschedules, |
---|
635 | // (it will be unblocked by the last RPC server thread). |
---|
636 | // - if there is no remote copies, the client thread unblock itself. |
---|
637 | if( remote_nr ) |
---|
638 | { |
---|
639 | sched_yield("blocked on rpc_process_sigaction"); |
---|
640 | } |
---|
641 | else |
---|
642 | { |
---|
643 | thread_unblock( client_xp , THREAD_BLOCKED_RPC ); |
---|
644 | } |
---|
645 | |
---|
646 | // handle the local process copy if required |
---|
647 | if( local != NULL ) |
---|
648 | { |
---|
649 | |
---|
650 | #if DEBUG_PROCESS_SIGACTION |
---|
651 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
652 | printk("\n[%s] thread[%x,%x] handles local process %x in cluster %x\n", |
---|
653 | __FUNCTION__, client->process->pid, client->trdid, pid , local_cxy ); |
---|
654 | #endif |
---|
655 | if (type == DELETE_ALL_THREADS ) process_delete_threads ( local , client_xp ); |
---|
656 | else if(type == BLOCK_ALL_THREADS ) process_block_threads ( local ); |
---|
657 | else if(type == UNBLOCK_ALL_THREADS ) process_unblock_threads( local ); |
---|
658 | } |
---|
659 | |
---|
660 | #if DEBUG_PROCESS_SIGACTION |
---|
661 | cycle = (uint32_t)hal_get_cycles(); |
---|
662 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
663 | printk("\n[%s] thread[%x,%x] exit after %s process %x / cycle %d\n", |
---|
664 | __FUNCTION__, client->process->pid, client->trdid, |
---|
665 | process_action_str( type ), pid, cycle ); |
---|
666 | #endif |
---|
667 | |
---|
668 | } // end process_sigaction() |
---|
669 | |
---|
670 | ///////////////////////////////////////////////// |
---|
671 | void process_block_threads( process_t * process ) |
---|
672 | { |
---|
673 | thread_t * target; // pointer on target thread |
---|
674 | thread_t * this; // pointer on calling thread |
---|
675 | uint32_t ltid; // index in process th_tbl[] |
---|
676 | cxy_t owner_cxy; // target process owner cluster |
---|
677 | uint32_t count; // requests counter |
---|
678 | volatile uint32_t ack_count; // acknowledges counter |
---|
679 | |
---|
680 | // get calling thread pointer |
---|
681 | this = CURRENT_THREAD; |
---|
682 | |
---|
683 | #if DEBUG_PROCESS_SIGACTION |
---|
684 | pid_t pid = process->pid; |
---|
685 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
686 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
687 | printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n", |
---|
688 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle ); |
---|
689 | #endif |
---|
690 | |
---|
691 | // check target process is an user process |
---|
692 | assert( (LPID_FROM_PID( process->pid ) != 0 ), |
---|
693 | "process %x is not an user process\n", process->pid ); |
---|
694 | |
---|
695 | // get target process owner cluster |
---|
696 | owner_cxy = CXY_FROM_PID( process->pid ); |
---|
697 | |
---|
698 | // get lock protecting process th_tbl[] |
---|
699 | rwlock_rd_acquire( &process->th_lock ); |
---|
700 | |
---|
701 | // loop on target process local threads |
---|
702 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
703 | // - if the calling thread and the target thread are not running on the same |
---|
704 | // core, we ask the target scheduler to acknowlege the blocking |
---|
705 | // to be sure that the target thread is not running. |
---|
706 | // - if the calling thread and the target thread are running on the same core, |
---|
707 | // we don't need confirmation from scheduler. |
---|
708 | |
---|
709 | for( ltid = 0 , count = 0 , ack_count = 0 ; count < process->th_nr ; ltid++ ) |
---|
710 | { |
---|
711 | target = process->th_tbl[ltid]; |
---|
712 | |
---|
713 | if( target != NULL ) // thread exist |
---|
714 | { |
---|
715 | count++; |
---|
716 | |
---|
717 | // set the global blocked bit in target thread descriptor. |
---|
718 | thread_block( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL ); |
---|
719 | |
---|
720 | if( this->core->lid != target->core->lid ) |
---|
721 | { |
---|
722 | // increment responses counter |
---|
723 | hal_atomic_add( (void*)&ack_count , 1 ); |
---|
724 | |
---|
725 | // set FLAG_REQ_ACK and &ack_rsp_count in target descriptor |
---|
726 | thread_set_req_ack( target , (uint32_t *)&ack_count ); |
---|
727 | |
---|
728 | // force scheduling on target thread |
---|
729 | dev_pic_send_ipi( local_cxy , target->core->lid ); |
---|
730 | } |
---|
731 | } |
---|
732 | } |
---|
733 | |
---|
734 | // release lock protecting process th_tbl[] |
---|
735 | rwlock_rd_release( &process->th_lock ); |
---|
736 | |
---|
737 | // wait other threads acknowledges TODO this could be improved... |
---|
738 | while( 1 ) |
---|
739 | { |
---|
740 | // exit when all scheduler acknowledges received |
---|
741 | if ( ack_count == 0 ) break; |
---|
742 | |
---|
743 | // wait 1000 cycles before retry |
---|
744 | hal_fixed_delay( 1000 ); |
---|
745 | } |
---|
746 | |
---|
747 | #if DEBUG_PROCESS_SIGACTION |
---|
748 | cycle = (uint32_t)hal_get_cycles(); |
---|
749 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
750 | printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n", |
---|
751 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle ); |
---|
752 | #endif |
---|
753 | |
---|
754 | } // end process_block_threads() |
---|
755 | |
---|
756 | ///////////////////////////////////////////////// |
---|
757 | void process_delete_threads( process_t * process, |
---|
758 | xptr_t client_xp ) |
---|
759 | { |
---|
760 | thread_t * this; // pointer on calling thread |
---|
761 | thread_t * target; // local pointer on target thread |
---|
762 | xptr_t target_xp; // extended pointer on target thread |
---|
763 | cxy_t owner_cxy; // owner process cluster |
---|
764 | uint32_t ltid; // index in process th_tbl |
---|
765 | uint32_t count; // threads counter |
---|
766 | |
---|
767 | // get calling thread pointer |
---|
768 | this = CURRENT_THREAD; |
---|
769 | |
---|
770 | // get target process owner cluster |
---|
771 | owner_cxy = CXY_FROM_PID( process->pid ); |
---|
772 | |
---|
773 | #if DEBUG_PROCESS_SIGACTION |
---|
774 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
775 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
776 | printk("\n[%s] thread[%x,%x] enter in cluster %x for process %x / cycle %d\n", |
---|
777 | __FUNCTION__, this->process->pid, this->trdid, local_cxy, process->pid, cycle ); |
---|
778 | #endif |
---|
779 | |
---|
780 | // check target process is an user process |
---|
781 | assert( (LPID_FROM_PID( process->pid ) != 0), |
---|
782 | "process %x is not an user process\n", process->pid ); |
---|
783 | |
---|
784 | // get lock protecting process th_tbl[] |
---|
785 | rwlock_wr_acquire( &process->th_lock ); |
---|
786 | |
---|
787 | // loop on target process local threads |
---|
788 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
789 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
790 | { |
---|
791 | target = process->th_tbl[ltid]; |
---|
792 | |
---|
793 | if( target != NULL ) // valid thread |
---|
794 | { |
---|
795 | count++; |
---|
796 | target_xp = XPTR( local_cxy , target ); |
---|
797 | |
---|
798 | // main thread and client thread should not be deleted |
---|
799 | if( ((ltid != 0) || (owner_cxy != local_cxy)) && // not main thread |
---|
800 | (client_xp) != target_xp ) // not client thread |
---|
801 | { |
---|
802 | // mark target thread for delete and block it |
---|
803 | thread_delete( target_xp , process->pid , false ); // not forced |
---|
804 | } |
---|
805 | } |
---|
806 | } |
---|
807 | |
---|
808 | // release lock protecting process th_tbl[] |
---|
809 | rwlock_wr_release( &process->th_lock ); |
---|
810 | |
---|
811 | #if DEBUG_PROCESS_SIGACTION |
---|
812 | cycle = (uint32_t)hal_get_cycles(); |
---|
813 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
814 | printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n", |
---|
815 | __FUNCTION__, this->process->pid, this->trdid, process->pid, local_cxy , cycle ); |
---|
816 | #endif |
---|
817 | |
---|
818 | } // end process_delete_threads() |
---|
819 | |
---|
820 | /////////////////////////////////////////////////// |
---|
821 | void process_unblock_threads( process_t * process ) |
---|
822 | { |
---|
823 | thread_t * target; // pointer on target thead |
---|
824 | thread_t * this; // pointer on calling thread |
---|
825 | uint32_t ltid; // index in process th_tbl |
---|
826 | uint32_t count; // requests counter |
---|
827 | |
---|
828 | // get calling thread pointer |
---|
829 | this = CURRENT_THREAD; |
---|
830 | |
---|
831 | #if DEBUG_PROCESS_SIGACTION |
---|
832 | pid_t pid = process->pid; |
---|
833 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
834 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
835 | printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n", |
---|
836 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle ); |
---|
837 | #endif |
---|
838 | |
---|
839 | // check target process is an user process |
---|
840 | assert( ( LPID_FROM_PID( process->pid ) != 0 ), |
---|
841 | "process %x is not an user process\n", process->pid ); |
---|
842 | |
---|
843 | // get lock protecting process th_tbl[] |
---|
844 | rwlock_rd_acquire( &process->th_lock ); |
---|
845 | |
---|
846 | // loop on process threads to unblock all threads |
---|
847 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
848 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
849 | { |
---|
850 | target = process->th_tbl[ltid]; |
---|
851 | |
---|
852 | if( target != NULL ) // thread found |
---|
853 | { |
---|
854 | count++; |
---|
855 | |
---|
856 | // reset the global blocked bit in target thread descriptor. |
---|
857 | thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL ); |
---|
858 | } |
---|
859 | } |
---|
860 | |
---|
861 | // release lock protecting process th_tbl[] |
---|
862 | rwlock_rd_release( &process->th_lock ); |
---|
863 | |
---|
864 | #if DEBUG_PROCESS_SIGACTION |
---|
865 | cycle = (uint32_t)hal_get_cycles(); |
---|
866 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
867 | printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n", |
---|
868 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle ); |
---|
869 | #endif |
---|
870 | |
---|
871 | } // end process_unblock_threads() |
---|
872 | |
---|
873 | /////////////////////////////////////////////// |
---|
874 | process_t * process_get_local_copy( pid_t pid ) |
---|
875 | { |
---|
876 | error_t error; |
---|
877 | process_t * process_ptr; // local pointer on process |
---|
878 | xptr_t process_xp; // extended pointer on process |
---|
879 | |
---|
880 | cluster_t * cluster = LOCAL_CLUSTER; |
---|
881 | |
---|
882 | #if DEBUG_PROCESS_GET_LOCAL_COPY |
---|
883 | thread_t * this = CURRENT_THREAD; |
---|
884 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
885 | if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle ) |
---|
886 | printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n", |
---|
887 | __FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle ); |
---|
888 | #endif |
---|
889 | |
---|
890 | // get lock protecting local list of processes |
---|
891 | remote_queuelock_acquire( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
---|
892 | |
---|
893 | // scan the local list of process descriptors to find the process |
---|
894 | xptr_t iter; |
---|
895 | bool_t found = false; |
---|
896 | XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter ) |
---|
897 | { |
---|
898 | process_xp = XLIST_ELEMENT( iter , process_t , local_list ); |
---|
899 | process_ptr = GET_PTR( process_xp ); |
---|
900 | if( process_ptr->pid == pid ) |
---|
901 | { |
---|
902 | found = true; |
---|
903 | break; |
---|
904 | } |
---|
905 | } |
---|
906 | |
---|
907 | // release lock protecting local list of processes |
---|
908 | remote_queuelock_release( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
---|
909 | |
---|
910 | // allocate memory for a new local process descriptor |
---|
911 | // and initialise it from reference cluster if not found |
---|
912 | if( !found ) |
---|
913 | { |
---|
914 | // get extended pointer on reference process descriptor |
---|
915 | xptr_t ref_xp = cluster_get_reference_process_from_pid( pid ); |
---|
916 | |
---|
917 | assert( (ref_xp != XPTR_NULL) , "illegal pid\n" ); |
---|
918 | |
---|
919 | // allocate memory for local process descriptor |
---|
920 | process_ptr = process_alloc(); |
---|
921 | |
---|
922 | if( process_ptr == NULL ) return NULL; |
---|
923 | |
---|
924 | // initialize local process descriptor copy |
---|
925 | error = process_copy_init( process_ptr , ref_xp ); |
---|
926 | |
---|
927 | if( error ) return NULL; |
---|
928 | } |
---|
929 | |
---|
930 | #if DEBUG_PROCESS_GET_LOCAL_COPY |
---|
931 | cycle = (uint32_t)hal_get_cycles(); |
---|
932 | if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle ) |
---|
933 | printk("\n[%s] thread[%x,%x] exit in cluster %x / process %x / cycle %d\n", |
---|
934 | __FUNCTION__, this->process->pid, this->trdid, local_cxy, process_ptr, cycle ); |
---|
935 | #endif |
---|
936 | |
---|
937 | return process_ptr; |
---|
938 | |
---|
939 | } // end process_get_local_copy() |
---|
940 | |
---|
941 | //////////////////////////////////////////// |
---|
942 | pid_t process_get_ppid( xptr_t process_xp ) |
---|
943 | { |
---|
944 | cxy_t process_cxy; |
---|
945 | process_t * process_ptr; |
---|
946 | xptr_t parent_xp; |
---|
947 | cxy_t parent_cxy; |
---|
948 | process_t * parent_ptr; |
---|
949 | |
---|
950 | // get process cluster and local pointer |
---|
951 | process_cxy = GET_CXY( process_xp ); |
---|
952 | process_ptr = GET_PTR( process_xp ); |
---|
953 | |
---|
954 | // get pointers on parent process |
---|
955 | parent_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) ); |
---|
956 | parent_cxy = GET_CXY( parent_xp ); |
---|
957 | parent_ptr = GET_PTR( parent_xp ); |
---|
958 | |
---|
959 | return hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
960 | } |
---|
961 | |
---|
962 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
963 | // File descriptor array related functions |
---|
964 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
965 | |
---|
966 | /////////////////////////////////////////// |
---|
967 | void process_fd_init( process_t * process ) |
---|
968 | { |
---|
969 | uint32_t fd; |
---|
970 | |
---|
971 | // initialize lock |
---|
972 | remote_queuelock_init( XPTR( local_cxy , &process->fd_array.lock ), LOCK_PROCESS_FDARRAY ); |
---|
973 | |
---|
974 | // initialize number of open files |
---|
975 | process->fd_array.current = 0; |
---|
976 | |
---|
977 | // initialize array |
---|
978 | for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ ) |
---|
979 | { |
---|
980 | process->fd_array.array[fd] = XPTR_NULL; |
---|
981 | } |
---|
982 | } |
---|
983 | //////////////////////////////////////////////////// |
---|
984 | error_t process_fd_register( xptr_t process_xp, |
---|
985 | xptr_t file_xp, |
---|
986 | uint32_t * fdid ) |
---|
987 | { |
---|
988 | bool_t found; |
---|
989 | uint32_t id; |
---|
990 | xptr_t xp; |
---|
991 | |
---|
992 | // get reference process cluster and local pointer |
---|
993 | process_t * process_ptr = GET_PTR( process_xp ); |
---|
994 | cxy_t process_cxy = GET_CXY( process_xp ); |
---|
995 | |
---|
996 | // check client process is reference process |
---|
997 | assert( (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->ref_xp ) ) ), |
---|
998 | "client process must be reference process\n" ); |
---|
999 | |
---|
1000 | #if DEBUG_PROCESS_FD_REGISTER |
---|
1001 | thread_t * this = CURRENT_THREAD; |
---|
1002 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1003 | pid_t pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid) ); |
---|
1004 | if( DEBUG_PROCESS_FD_REGISTER < cycle ) |
---|
1005 | printk("\n[%s] thread[%x,%x] enter for process %x / cycle %d\n", |
---|
1006 | __FUNCTION__, this->process->pid, this->trdid, pid, cycle ); |
---|
1007 | #endif |
---|
1008 | |
---|
1009 | // build extended pointer on lock protecting reference fd_array |
---|
1010 | xptr_t lock_xp = XPTR( process_cxy , &process_ptr->fd_array.lock ); |
---|
1011 | |
---|
1012 | // take lock protecting reference fd_array |
---|
1013 | remote_queuelock_acquire( lock_xp ); |
---|
1014 | |
---|
1015 | found = false; |
---|
1016 | |
---|
1017 | for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ ) |
---|
1018 | { |
---|
1019 | xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) ); |
---|
1020 | if ( xp == XPTR_NULL ) |
---|
1021 | { |
---|
1022 | // update reference fd_array |
---|
1023 | hal_remote_s64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) , file_xp ); |
---|
1024 | hal_remote_atomic_add( XPTR( process_cxy , &process_ptr->fd_array.current ) , 1 ); |
---|
1025 | |
---|
1026 | // exit |
---|
1027 | *fdid = id; |
---|
1028 | found = true; |
---|
1029 | break; |
---|
1030 | } |
---|
1031 | } |
---|
1032 | |
---|
1033 | // release lock protecting fd_array |
---|
1034 | remote_queuelock_release( lock_xp ); |
---|
1035 | |
---|
1036 | #if DEBUG_PROCESS_FD_REGISTER |
---|
1037 | cycle = (uint32_t)hal_get_cycles(); |
---|
1038 | if( DEBUG_PROCESS_FD_REGISTER < cycle ) |
---|
1039 | printk("\n[%s] thread[%x,%x] exit for process %x / fdid %d / cycle %d\n", |
---|
1040 | __FUNCTION__, this->process->pid, this->trdid, pid, id, cycle ); |
---|
1041 | #endif |
---|
1042 | |
---|
1043 | if ( !found ) return -1; |
---|
1044 | else return 0; |
---|
1045 | |
---|
1046 | } // end process_fd_register() |
---|
1047 | |
---|
1048 | //////////////////////////////////////////////// |
---|
1049 | xptr_t process_fd_get_xptr( process_t * process, |
---|
1050 | uint32_t fdid ) |
---|
1051 | { |
---|
1052 | xptr_t file_xp; |
---|
1053 | xptr_t lock_xp; |
---|
1054 | |
---|
1055 | // access local copy of process descriptor |
---|
1056 | file_xp = process->fd_array.array[fdid]; |
---|
1057 | |
---|
1058 | if( file_xp == XPTR_NULL ) |
---|
1059 | { |
---|
1060 | // get reference process cluster and local pointer |
---|
1061 | xptr_t ref_xp = process->ref_xp; |
---|
1062 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
1063 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
1064 | |
---|
1065 | // build extended pointer on lock protecting reference fd_array |
---|
1066 | lock_xp = XPTR( ref_cxy , &ref_ptr->fd_array.lock ); |
---|
1067 | |
---|
1068 | // take lock protecting reference fd_array |
---|
1069 | remote_queuelock_acquire( lock_xp ); |
---|
1070 | |
---|
1071 | // access reference process descriptor |
---|
1072 | file_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->fd_array.array[fdid] ) ); |
---|
1073 | |
---|
1074 | // update local fd_array if found |
---|
1075 | if( file_xp != XPTR_NULL ) process->fd_array.array[fdid] = file_xp; |
---|
1076 | |
---|
1077 | // release lock protecting reference fd_array |
---|
1078 | remote_queuelock_release( lock_xp ); |
---|
1079 | } |
---|
1080 | |
---|
1081 | return file_xp; |
---|
1082 | |
---|
1083 | } // end process_fd_get_xptr() |
---|
1084 | |
---|
1085 | /////////////////////////////////////////// |
---|
1086 | void process_fd_remote_copy( xptr_t dst_xp, |
---|
1087 | xptr_t src_xp ) |
---|
1088 | { |
---|
1089 | uint32_t fd; |
---|
1090 | xptr_t entry; |
---|
1091 | |
---|
1092 | // get cluster and local pointer for src fd_array |
---|
1093 | cxy_t src_cxy = GET_CXY( src_xp ); |
---|
1094 | fd_array_t * src_ptr = GET_PTR( src_xp ); |
---|
1095 | |
---|
1096 | // get cluster and local pointer for dst fd_array |
---|
1097 | cxy_t dst_cxy = GET_CXY( dst_xp ); |
---|
1098 | fd_array_t * dst_ptr = GET_PTR( dst_xp ); |
---|
1099 | |
---|
1100 | // get the remote lock protecting the src fd_array |
---|
1101 | remote_queuelock_acquire( XPTR( src_cxy , &src_ptr->lock ) ); |
---|
1102 | |
---|
1103 | // loop on all fd_array entries |
---|
1104 | for( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ ) |
---|
1105 | { |
---|
1106 | entry = (xptr_t)hal_remote_l64( XPTR( src_cxy , &src_ptr->array[fd] ) ); |
---|
1107 | |
---|
1108 | if( entry != XPTR_NULL ) |
---|
1109 | { |
---|
1110 | // increment file descriptor refcount |
---|
1111 | vfs_file_count_up( entry ); |
---|
1112 | |
---|
1113 | // copy entry in destination process fd_array |
---|
1114 | hal_remote_s64( XPTR( dst_cxy , &dst_ptr->array[fd] ) , entry ); |
---|
1115 | } |
---|
1116 | } |
---|
1117 | |
---|
1118 | // release lock on source process fd_array |
---|
1119 | remote_queuelock_release( XPTR( src_cxy , &src_ptr->lock ) ); |
---|
1120 | |
---|
1121 | } // end process_fd_remote_copy() |
---|
1122 | |
---|
1123 | |
---|
1124 | //////////////////////////////////// |
---|
1125 | bool_t process_fd_array_full( void ) |
---|
1126 | { |
---|
1127 | // get extended pointer on reference process |
---|
1128 | xptr_t ref_xp = CURRENT_THREAD->process->ref_xp; |
---|
1129 | |
---|
1130 | // get reference process cluster and local pointer |
---|
1131 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
1132 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
1133 | |
---|
1134 | // get number of open file descriptors from reference fd_array |
---|
1135 | uint32_t current = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->fd_array.current ) ); |
---|
1136 | |
---|
1137 | return ( current >= CONFIG_PROCESS_FILE_MAX_NR ); |
---|
1138 | } |
---|
1139 | |
---|
1140 | |
---|
1141 | //////////////////////////////////////////////////////////////////////////////////// |
---|
1142 | // Thread related functions |
---|
1143 | //////////////////////////////////////////////////////////////////////////////////// |
---|
1144 | |
---|
1145 | ///////////////////////////////////////////////////// |
---|
1146 | error_t process_register_thread( process_t * process, |
---|
1147 | thread_t * thread, |
---|
1148 | trdid_t * trdid ) |
---|
1149 | { |
---|
1150 | ltid_t ltid; |
---|
1151 | bool_t found = false; |
---|
1152 | |
---|
1153 | // check arguments |
---|
1154 | assert( (process != NULL) , "process argument is NULL" ); |
---|
1155 | assert( (thread != NULL) , "thread argument is NULL" ); |
---|
1156 | |
---|
1157 | // get the lock protecting th_tbl for all threads |
---|
1158 | // but the idle thread executing kernel_init (cannot yield) |
---|
1159 | if( thread->type != THREAD_IDLE ) rwlock_wr_acquire( &process->th_lock ); |
---|
1160 | |
---|
1161 | // scan th_tbl |
---|
1162 | for( ltid = 0 ; ltid < CONFIG_THREADS_MAX_PER_CLUSTER ; ltid++ ) |
---|
1163 | { |
---|
1164 | if( process->th_tbl[ltid] == NULL ) |
---|
1165 | { |
---|
1166 | found = true; |
---|
1167 | break; |
---|
1168 | } |
---|
1169 | } |
---|
1170 | |
---|
1171 | if( found ) |
---|
1172 | { |
---|
1173 | // register thread in th_tbl[] |
---|
1174 | process->th_tbl[ltid] = thread; |
---|
1175 | process->th_nr++; |
---|
1176 | |
---|
1177 | // returns trdid |
---|
1178 | *trdid = TRDID( local_cxy , ltid ); |
---|
1179 | } |
---|
1180 | |
---|
1181 | // release the lock protecting th_tbl |
---|
1182 | if( thread->type != THREAD_IDLE ) rwlock_wr_release( &process->th_lock ); |
---|
1183 | |
---|
1184 | return (found) ? 0 : 0xFFFFFFFF; |
---|
1185 | |
---|
1186 | } // end process_register_thread() |
---|
1187 | |
---|
1188 | ///////////////////////////////////////////////// |
---|
1189 | bool_t process_remove_thread( thread_t * thread ) |
---|
1190 | { |
---|
1191 | uint32_t count; // number of threads in local process descriptor |
---|
1192 | |
---|
1193 | process_t * process = thread->process; |
---|
1194 | |
---|
1195 | // get thread local index |
---|
1196 | ltid_t ltid = LTID_FROM_TRDID( thread->trdid ); |
---|
1197 | |
---|
1198 | // get the lock protecting th_tbl[] |
---|
1199 | rwlock_wr_acquire( &process->th_lock ); |
---|
1200 | |
---|
1201 | // get number of threads |
---|
1202 | count = process->th_nr; |
---|
1203 | |
---|
1204 | // check thread |
---|
1205 | assert( (thread != NULL) , "thread argument is NULL" ); |
---|
1206 | |
---|
1207 | // check th_nr value |
---|
1208 | assert( (count > 0) , "process th_nr cannot be 0\n" ); |
---|
1209 | |
---|
1210 | // remove thread from th_tbl[] |
---|
1211 | process->th_tbl[ltid] = NULL; |
---|
1212 | process->th_nr = count-1; |
---|
1213 | |
---|
1214 | // release lock protecting th_tbl |
---|
1215 | rwlock_wr_release( &process->th_lock ); |
---|
1216 | |
---|
1217 | return (count == 1); |
---|
1218 | |
---|
1219 | } // end process_remove_thread() |
---|
1220 | |
---|
1221 | ///////////////////////////////////////////////////////// |
---|
1222 | error_t process_make_fork( xptr_t parent_process_xp, |
---|
1223 | xptr_t parent_thread_xp, |
---|
1224 | pid_t * child_pid, |
---|
1225 | thread_t ** child_thread ) |
---|
1226 | { |
---|
1227 | process_t * process; // local pointer on child process descriptor |
---|
1228 | thread_t * thread; // local pointer on child thread descriptor |
---|
1229 | pid_t new_pid; // process identifier for child process |
---|
1230 | pid_t parent_pid; // process identifier for parent process |
---|
1231 | xptr_t ref_xp; // extended pointer on reference process |
---|
1232 | xptr_t vfs_bin_xp; // extended pointer on .elf file |
---|
1233 | error_t error; |
---|
1234 | |
---|
1235 | // get cluster and local pointer for parent process |
---|
1236 | cxy_t parent_process_cxy = GET_CXY( parent_process_xp ); |
---|
1237 | process_t * parent_process_ptr = GET_PTR( parent_process_xp ); |
---|
1238 | |
---|
1239 | // get parent process PID and extended pointer on .elf file |
---|
1240 | parent_pid = hal_remote_l32 (XPTR( parent_process_cxy , &parent_process_ptr->pid)); |
---|
1241 | vfs_bin_xp = hal_remote_l64(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp)); |
---|
1242 | |
---|
1243 | // get extended pointer on reference process |
---|
1244 | ref_xp = hal_remote_l64( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) ); |
---|
1245 | |
---|
1246 | // check parent process is the reference process |
---|
1247 | assert( (parent_process_xp == ref_xp ) , |
---|
1248 | "parent process must be the reference process\n" ); |
---|
1249 | |
---|
1250 | #if DEBUG_PROCESS_MAKE_FORK |
---|
1251 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1252 | thread_t * this = CURRENT_THREAD; |
---|
1253 | trdid_t trdid = this->trdid; |
---|
1254 | pid_t pid = this->process->pid; |
---|
1255 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1256 | printk("\n[%s] thread[%x,%x] enter / cluster %x / cycle %d\n", |
---|
1257 | __FUNCTION__, pid, trdid, local_cxy, cycle ); |
---|
1258 | #endif |
---|
1259 | |
---|
1260 | // allocate a process descriptor |
---|
1261 | process = process_alloc(); |
---|
1262 | if( process == NULL ) |
---|
1263 | { |
---|
1264 | printk("\n[ERROR] in %s : cannot get process in cluster %x\n", |
---|
1265 | __FUNCTION__, local_cxy ); |
---|
1266 | return -1; |
---|
1267 | } |
---|
1268 | |
---|
1269 | // allocate a child PID from local cluster |
---|
1270 | error = cluster_pid_alloc( process , &new_pid ); |
---|
1271 | if( error ) |
---|
1272 | { |
---|
1273 | printk("\n[ERROR] in %s : cannot get PID in cluster %x\n", |
---|
1274 | __FUNCTION__, local_cxy ); |
---|
1275 | process_free( process ); |
---|
1276 | return -1; |
---|
1277 | } |
---|
1278 | |
---|
1279 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
1280 | cycle = (uint32_t)hal_get_cycles(); |
---|
1281 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1282 | printk("\n[%s] thread[%x,%x] allocated process %x / cycle %d\n", |
---|
1283 | __FUNCTION__, pid, trdid, new_pid, cycle ); |
---|
1284 | #endif |
---|
1285 | |
---|
1286 | // initializes child process descriptor from parent process descriptor |
---|
1287 | process_reference_init( process, |
---|
1288 | new_pid, |
---|
1289 | parent_process_xp ); |
---|
1290 | |
---|
1291 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
1292 | cycle = (uint32_t)hal_get_cycles(); |
---|
1293 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1294 | printk("\n[%s] thread[%x,%x] initialized child_process %x / cycle %d\n", |
---|
1295 | __FUNCTION__, pid, trdid, new_pid, cycle ); |
---|
1296 | #endif |
---|
1297 | |
---|
1298 | |
---|
1299 | // copy VMM from parent descriptor to child descriptor |
---|
1300 | error = vmm_fork_copy( process, |
---|
1301 | parent_process_xp ); |
---|
1302 | if( error ) |
---|
1303 | { |
---|
1304 | printk("\n[ERROR] in %s : cannot copy VMM in cluster %x\n", |
---|
1305 | __FUNCTION__, local_cxy ); |
---|
1306 | process_free( process ); |
---|
1307 | cluster_pid_release( new_pid ); |
---|
1308 | return -1; |
---|
1309 | } |
---|
1310 | |
---|
1311 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
1312 | cycle = (uint32_t)hal_get_cycles(); |
---|
1313 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1314 | printk("\n[%s] thread[%x,%x] copied VMM from parent to child / cycle %d\n", |
---|
1315 | __FUNCTION__, pid, trdid, cycle ); |
---|
1316 | #endif |
---|
1317 | |
---|
1318 | // if parent_process is INIT, or if parent_process is the TXT owner, |
---|
1319 | // the child_process becomes the owner of its TXT terminal |
---|
1320 | if( (parent_pid == 1) || process_txt_is_owner( parent_process_xp ) ) |
---|
1321 | { |
---|
1322 | process_txt_set_ownership( XPTR( local_cxy , process ) ); |
---|
1323 | |
---|
1324 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
1325 | cycle = (uint32_t)hal_get_cycles(); |
---|
1326 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1327 | printk("\n[%s] thread[%x,%x] / child takes TXT ownership / cycle %d\n", |
---|
1328 | __FUNCTION__ , pid, trdid, cycle ); |
---|
1329 | #endif |
---|
1330 | |
---|
1331 | } |
---|
1332 | |
---|
1333 | // update extended pointer on .elf file |
---|
1334 | process->vfs_bin_xp = vfs_bin_xp; |
---|
1335 | |
---|
1336 | // create child thread descriptor from parent thread descriptor |
---|
1337 | error = thread_user_fork( parent_thread_xp, |
---|
1338 | process, |
---|
1339 | &thread ); |
---|
1340 | if( error ) |
---|
1341 | { |
---|
1342 | printk("\n[ERROR] in %s : cannot create thread in cluster %x\n", |
---|
1343 | __FUNCTION__, local_cxy ); |
---|
1344 | process_free( process ); |
---|
1345 | cluster_pid_release( new_pid ); |
---|
1346 | return -1; |
---|
1347 | } |
---|
1348 | |
---|
1349 | // check main thread LTID |
---|
1350 | assert( (LTID_FROM_TRDID(thread->trdid) == 0) , |
---|
1351 | "main thread must have LTID == 0\n" ); |
---|
1352 | |
---|
1353 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
1354 | cycle = (uint32_t)hal_get_cycles(); |
---|
1355 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1356 | printk("\n[%s] thread[%x,%x] created main thread %x / cycle %d\n", |
---|
1357 | __FUNCTION__, pid, trdid, thread, cycle ); |
---|
1358 | #endif |
---|
1359 | |
---|
1360 | // set Copy_On_Write flag in parent process GPT |
---|
1361 | // this includes all replicated GPT copies |
---|
1362 | if( parent_process_cxy == local_cxy ) // reference is local |
---|
1363 | { |
---|
1364 | vmm_set_cow( parent_process_ptr ); |
---|
1365 | } |
---|
1366 | else // reference is remote |
---|
1367 | { |
---|
1368 | rpc_vmm_set_cow_client( parent_process_cxy, |
---|
1369 | parent_process_ptr ); |
---|
1370 | } |
---|
1371 | |
---|
1372 | // set Copy_On_Write flag in child process GPT |
---|
1373 | vmm_set_cow( process ); |
---|
1374 | |
---|
1375 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
1376 | cycle = (uint32_t)hal_get_cycles(); |
---|
1377 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1378 | printk("\n[%s] thread[%x,%x] set COW in parent and child / cycle %d\n", |
---|
1379 | __FUNCTION__, pid, trdid, cycle ); |
---|
1380 | #endif |
---|
1381 | |
---|
1382 | // get extended pointers on parent children_root, children_lock and children_nr |
---|
1383 | xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root ); |
---|
1384 | xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock ); |
---|
1385 | xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr ); |
---|
1386 | |
---|
1387 | // register process in parent children list |
---|
1388 | remote_queuelock_acquire( children_lock_xp ); |
---|
1389 | xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) ); |
---|
1390 | hal_remote_atomic_add( children_nr_xp , 1 ); |
---|
1391 | remote_queuelock_release( children_lock_xp ); |
---|
1392 | |
---|
1393 | // return success |
---|
1394 | *child_thread = thread; |
---|
1395 | *child_pid = new_pid; |
---|
1396 | |
---|
1397 | #if DEBUG_PROCESS_MAKE_FORK |
---|
1398 | cycle = (uint32_t)hal_get_cycles(); |
---|
1399 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1400 | printk("\n[%s] thread[%x,%x] exit / created process %x / cycle %d\n", |
---|
1401 | __FUNCTION__, pid, trdid, new_pid, cycle ); |
---|
1402 | #endif |
---|
1403 | |
---|
1404 | return 0; |
---|
1405 | |
---|
1406 | } // end process_make_fork() |
---|
1407 | |
---|
1408 | ///////////////////////////////////////////////////// |
---|
1409 | error_t process_make_exec( exec_info_t * exec_info ) |
---|
1410 | { |
---|
1411 | thread_t * thread; // local pointer on this thread |
---|
1412 | process_t * process; // local pointer on this process |
---|
1413 | pid_t pid; // this process identifier |
---|
1414 | xptr_t ref_xp; // reference process for this process |
---|
1415 | error_t error; // value returned by called functions |
---|
1416 | char * path; // path to .elf file |
---|
1417 | xptr_t file_xp; // extended pointer on .elf file descriptor |
---|
1418 | uint32_t file_id; // file index in fd_array |
---|
1419 | uint32_t args_nr; // number of main thread arguments |
---|
1420 | char ** args_pointers; // array of pointers on main thread arguments |
---|
1421 | |
---|
1422 | // get thread, process, pid and ref_xp |
---|
1423 | thread = CURRENT_THREAD; |
---|
1424 | process = thread->process; |
---|
1425 | pid = process->pid; |
---|
1426 | ref_xp = process->ref_xp; |
---|
1427 | |
---|
1428 | // get relevant infos from exec_info |
---|
1429 | path = exec_info->path; |
---|
1430 | args_nr = exec_info->args_nr; |
---|
1431 | args_pointers = exec_info->args_pointers; |
---|
1432 | |
---|
1433 | #if DEBUG_PROCESS_MAKE_EXEC |
---|
1434 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1435 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1436 | printk("\n[%s] thread[%x,%x] enters for %s / cycle %d\n", |
---|
1437 | __FUNCTION__, pid, thread->trdid, path, cycle ); |
---|
1438 | #endif |
---|
1439 | |
---|
1440 | // open the file identified by <path> |
---|
1441 | file_xp = XPTR_NULL; |
---|
1442 | file_id = 0xFFFFFFFF; |
---|
1443 | error = vfs_open( process->vfs_root_xp, |
---|
1444 | path, |
---|
1445 | ref_xp, |
---|
1446 | O_RDONLY, |
---|
1447 | 0, |
---|
1448 | &file_xp, |
---|
1449 | &file_id ); |
---|
1450 | if( error ) |
---|
1451 | { |
---|
1452 | printk("\n[ERROR] in %s : failed to open file <%s>\n", __FUNCTION__ , path ); |
---|
1453 | return -1; |
---|
1454 | } |
---|
1455 | |
---|
1456 | #if (DEBUG_PROCESS_MAKE_EXEC & 1) |
---|
1457 | cycle = (uint32_t)hal_get_cycles(); |
---|
1458 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1459 | printk("\n[%s] thread[%x,%x] opened file <%s> / cycle %d\n", |
---|
1460 | __FUNCTION__, pid, thread->trdid, path, cycle ); |
---|
1461 | #endif |
---|
1462 | |
---|
1463 | // delete all threads other than this main thread in all clusters |
---|
1464 | process_sigaction( pid , DELETE_ALL_THREADS ); |
---|
1465 | |
---|
1466 | #if (DEBUG_PROCESS_MAKE_EXEC & 1) |
---|
1467 | cycle = (uint32_t)hal_get_cycles(); |
---|
1468 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1469 | printk("\n[%s] thread[%x,%x] deleted all threads / cycle %d\n", |
---|
1470 | __FUNCTION__, pid, thread->trdid, cycle ); |
---|
1471 | #endif |
---|
1472 | |
---|
1473 | // reset local process VMM |
---|
1474 | vmm_destroy( process ); |
---|
1475 | |
---|
1476 | #if( DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
1477 | cycle = (uint32_t)hal_get_cycles(); |
---|
1478 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1479 | printk("\n[%s] thread[%x,%x] reset VMM / cycle %d\n", |
---|
1480 | __FUNCTION__, pid, thread->trdid, cycle ); |
---|
1481 | #endif |
---|
1482 | |
---|
1483 | // re-initialize the VMM (kentry/args/envs vsegs registration) |
---|
1484 | error = vmm_init( process ); |
---|
1485 | if( error ) |
---|
1486 | { |
---|
1487 | printk("\n[ERROR] in %s : cannot initialise VMM for %s\n", __FUNCTION__ , path ); |
---|
1488 | vfs_close( file_xp , file_id ); |
---|
1489 | // FIXME restore old process VMM |
---|
1490 | return -1; |
---|
1491 | } |
---|
1492 | |
---|
1493 | #if( DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
1494 | cycle = (uint32_t)hal_get_cycles(); |
---|
1495 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1496 | printk("\n[%s] thread[%x,%x] / kentry/args/envs vsegs registered / cycle %d\n", |
---|
1497 | __FUNCTION__, pid, thread->trdid, cycle ); |
---|
1498 | #endif |
---|
1499 | |
---|
1500 | // register code & data vsegs as well as entry-point in process VMM, |
---|
1501 | // and register extended pointer on .elf file in process descriptor |
---|
1502 | error = elf_load_process( file_xp , process ); |
---|
1503 | if( error ) |
---|
1504 | { |
---|
1505 | printk("\n[ERROR] in %s : failed to access <%s>\n", __FUNCTION__ , path ); |
---|
1506 | vfs_close( file_xp , file_id ); |
---|
1507 | // FIXME restore old process VMM |
---|
1508 | return -1; |
---|
1509 | } |
---|
1510 | |
---|
1511 | #if( DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
1512 | cycle = (uint32_t)hal_get_cycles(); |
---|
1513 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1514 | printk("\n[%s] thread[%x,%x] / code/data vsegs registered / cycle %d\n", |
---|
1515 | __FUNCTION__, pid, thread->trdid, cycle ); |
---|
1516 | #endif |
---|
1517 | |
---|
1518 | // update the existing main thread descriptor... and jump to user code |
---|
1519 | error = thread_user_exec( (void *)process->vmm.entry_point, |
---|
1520 | args_nr, |
---|
1521 | args_pointers ); |
---|
1522 | if( error ) |
---|
1523 | { |
---|
1524 | printk("\n[ERROR] in %s : cannot update main thread for %s\n", __FUNCTION__ , path ); |
---|
1525 | vfs_close( file_xp , file_id ); |
---|
1526 | // FIXME restore old process VMM |
---|
1527 | return -1; |
---|
1528 | } |
---|
1529 | |
---|
1530 | assert( false, "we should not execute this code"); |
---|
1531 | |
---|
1532 | return 0; |
---|
1533 | |
---|
1534 | } // end process_make_exec() |
---|
1535 | |
---|
1536 | |
---|
1537 | /////////////////////////////////////////////// |
---|
1538 | void process_zero_create( process_t * process ) |
---|
1539 | { |
---|
1540 | error_t error; |
---|
1541 | pid_t pid; |
---|
1542 | |
---|
1543 | #if DEBUG_PROCESS_ZERO_CREATE |
---|
1544 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1545 | if( DEBUG_PROCESS_ZERO_CREATE < cycle ) |
---|
1546 | printk("\n[%s] enter / cluster %x / cycle %d\n", |
---|
1547 | __FUNCTION__, local_cxy, cycle ); |
---|
1548 | #endif |
---|
1549 | |
---|
1550 | // get PID from local cluster manager for this kernel process |
---|
1551 | error = cluster_pid_alloc( process , &pid ); |
---|
1552 | |
---|
1553 | if( error || (LPID_FROM_PID( pid ) != 0) ) |
---|
1554 | { |
---|
1555 | printk("\n[PANIC] in %s : cannot get valid PID in cluster %x / PID = %x\n", |
---|
1556 | __FUNCTION__ , local_cxy, pid ); |
---|
1557 | hal_core_sleep(); |
---|
1558 | } |
---|
1559 | |
---|
1560 | // initialize PID, REF_XP, PARENT_XP, and STATE |
---|
1561 | // the kernel process_zero is its own parent_process, |
---|
1562 | // reference_process, and owner_process, and cannot be killed... |
---|
1563 | process->pid = pid; |
---|
1564 | process->ref_xp = XPTR( local_cxy , process ); |
---|
1565 | process->owner_xp = XPTR( local_cxy , process ); |
---|
1566 | process->parent_xp = XPTR( local_cxy , process ); |
---|
1567 | process->term_state = 0; |
---|
1568 | |
---|
1569 | // reset th_tbl[] array and associated fields |
---|
1570 | uint32_t i; |
---|
1571 | for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ ) |
---|
1572 | { |
---|
1573 | process->th_tbl[i] = NULL; |
---|
1574 | } |
---|
1575 | process->th_nr = 0; |
---|
1576 | rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL ); |
---|
1577 | |
---|
1578 | |
---|
1579 | // reset children list as empty |
---|
1580 | xlist_root_init( XPTR( local_cxy , &process->children_root ) ); |
---|
1581 | process->children_nr = 0; |
---|
1582 | remote_queuelock_init( XPTR( local_cxy , &process->children_lock ), |
---|
1583 | LOCK_PROCESS_CHILDREN ); |
---|
1584 | |
---|
1585 | // register kernel process in cluster manager local_list |
---|
1586 | cluster_process_local_link( process ); |
---|
1587 | |
---|
1588 | hal_fence(); |
---|
1589 | |
---|
1590 | #if DEBUG_PROCESS_ZERO_CREATE |
---|
1591 | cycle = (uint32_t)hal_get_cycles(); |
---|
1592 | if( DEBUG_PROCESS_ZERO_CREATE < cycle ) |
---|
1593 | printk("\n[%s] exit / cluster %x / cycle %d\n", |
---|
1594 | __FUNCTION__, local_cxy, cycle ); |
---|
1595 | #endif |
---|
1596 | |
---|
1597 | } // end process_zero_create() |
---|
1598 | |
---|
1599 | //////////////////////////////// |
---|
1600 | void process_init_create( void ) |
---|
1601 | { |
---|
1602 | process_t * process; // local pointer on process descriptor |
---|
1603 | pid_t pid; // process_init identifier |
---|
1604 | thread_t * thread; // local pointer on main thread |
---|
1605 | pthread_attr_t attr; // main thread attributes |
---|
1606 | lid_t lid; // selected core local index for main thread |
---|
1607 | xptr_t file_xp; // extended pointer on .elf file descriptor |
---|
1608 | uint32_t file_id; // file index in fd_array |
---|
1609 | error_t error; |
---|
1610 | |
---|
1611 | #if DEBUG_PROCESS_INIT_CREATE |
---|
1612 | thread_t * this = CURRENT_THREAD; |
---|
1613 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1614 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
1615 | printk("\n[%s] thread[%x,%x] enter / cycle %d\n", |
---|
1616 | __FUNCTION__, this->process->pid, this->trdid, cycle ); |
---|
1617 | #endif |
---|
1618 | |
---|
1619 | // allocates memory for process descriptor from local cluster |
---|
1620 | process = process_alloc(); |
---|
1621 | |
---|
1622 | // check memory allocator |
---|
1623 | assert( (process != NULL), |
---|
1624 | "no memory for process descriptor in cluster %x\n", local_cxy ); |
---|
1625 | |
---|
1626 | // set the CWD and VFS_ROOT fields in process descriptor |
---|
1627 | process->cwd_xp = process_zero.vfs_root_xp; |
---|
1628 | process->vfs_root_xp = process_zero.vfs_root_xp; |
---|
1629 | |
---|
1630 | // get PID from local cluster |
---|
1631 | error = cluster_pid_alloc( process , &pid ); |
---|
1632 | |
---|
1633 | // check PID allocator |
---|
1634 | assert( (error == 0), |
---|
1635 | "cannot allocate PID in cluster %x\n", local_cxy ); |
---|
1636 | |
---|
1637 | // check PID value |
---|
1638 | assert( (pid == 1) , |
---|
1639 | "process INIT must be first process in cluster 0\n" ); |
---|
1640 | |
---|
1641 | // initialize process descriptor / parent is local process_zero |
---|
1642 | process_reference_init( process, |
---|
1643 | pid, |
---|
1644 | XPTR( local_cxy , &process_zero ) ); |
---|
1645 | |
---|
1646 | #if(DEBUG_PROCESS_INIT_CREATE & 1) |
---|
1647 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
1648 | printk("\n[%s] thread[%x,%x] initialized process descriptor\n", |
---|
1649 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
1650 | #endif |
---|
1651 | |
---|
1652 | // open the file identified by CONFIG_PROCESS_INIT_PATH |
---|
1653 | file_xp = XPTR_NULL; |
---|
1654 | file_id = -1; |
---|
1655 | error = vfs_open( process->vfs_root_xp, |
---|
1656 | CONFIG_PROCESS_INIT_PATH, |
---|
1657 | XPTR( local_cxy , process ), |
---|
1658 | O_RDONLY, |
---|
1659 | 0, |
---|
1660 | &file_xp, |
---|
1661 | &file_id ); |
---|
1662 | |
---|
1663 | assert( (error == 0), |
---|
1664 | "failed to open file <%s>\n", CONFIG_PROCESS_INIT_PATH ); |
---|
1665 | |
---|
1666 | #if(DEBUG_PROCESS_INIT_CREATE & 1) |
---|
1667 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
1668 | printk("\n[%s] thread[%x,%x] open .elf file decriptor\n", |
---|
1669 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
1670 | #endif |
---|
1671 | |
---|
1672 | // register "code" and "data" vsegs as well as entry-point |
---|
1673 | // in process VMM, using information contained in the elf file. |
---|
1674 | error = elf_load_process( file_xp , process ); |
---|
1675 | |
---|
1676 | assert( (error == 0), |
---|
1677 | "cannot access .elf file <%s>\n", CONFIG_PROCESS_INIT_PATH ); |
---|
1678 | |
---|
1679 | #if(DEBUG_PROCESS_INIT_CREATE & 1) |
---|
1680 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
1681 | printk("\n[%s] thread[%x,%x] registered code/data vsegs in VMM\n", |
---|
1682 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
1683 | #endif |
---|
1684 | |
---|
1685 | // get extended pointers on process_zero children_root, children_lock |
---|
1686 | xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root ); |
---|
1687 | xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock ); |
---|
1688 | |
---|
1689 | // take lock protecting kernel process children list |
---|
1690 | remote_queuelock_acquire( children_lock_xp ); |
---|
1691 | |
---|
1692 | // register process INIT in parent local process_zero |
---|
1693 | xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) ); |
---|
1694 | hal_atomic_add( &process_zero.children_nr , 1 ); |
---|
1695 | |
---|
1696 | // release lock protecting kernel process children list |
---|
1697 | remote_queuelock_release( children_lock_xp ); |
---|
1698 | |
---|
1699 | #if(DEBUG_PROCESS_INIT_CREATE & 1) |
---|
1700 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
1701 | printk("\n[%s] thread[%x,%x] registered init process in parent\n", |
---|
1702 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
1703 | #endif |
---|
1704 | |
---|
1705 | // select a core in local cluster to execute the main thread |
---|
1706 | lid = cluster_select_local_core(); |
---|
1707 | |
---|
1708 | // initialize pthread attributes for main thread |
---|
1709 | attr.attributes = PT_ATTR_DETACH | PT_ATTR_CLUSTER_DEFINED | PT_ATTR_CORE_DEFINED; |
---|
1710 | attr.cxy = local_cxy; |
---|
1711 | attr.lid = lid; |
---|
1712 | |
---|
1713 | // create and initialize thread descriptor |
---|
1714 | error = thread_user_create( pid, |
---|
1715 | (void *)process->vmm.entry_point, |
---|
1716 | NULL, |
---|
1717 | &attr, |
---|
1718 | &thread ); |
---|
1719 | |
---|
1720 | assert( (error == 0), |
---|
1721 | "cannot create main thread for <%s>\n", CONFIG_PROCESS_INIT_PATH ); |
---|
1722 | |
---|
1723 | assert( (thread->trdid == 0), |
---|
1724 | "main thread must have index 0 for <%s>\n", CONFIG_PROCESS_INIT_PATH ); |
---|
1725 | |
---|
1726 | #if(DEBUG_PROCESS_INIT_CREATE & 1) |
---|
1727 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
1728 | printk("\n[%s] thread[%x,%x] created main thread\n", |
---|
1729 | __FUNCTION__, this->process->pid, this->trdid ); |
---|
1730 | #endif |
---|
1731 | |
---|
1732 | // activate thread |
---|
1733 | thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL ); |
---|
1734 | |
---|
1735 | hal_fence(); |
---|
1736 | |
---|
1737 | #if DEBUG_PROCESS_INIT_CREATE |
---|
1738 | cycle = (uint32_t)hal_get_cycles(); |
---|
1739 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
1740 | printk("\n[%s] thread[%x,%x] exit / cycle %d\n", |
---|
1741 | __FUNCTION__, this->process->pid, this->trdid, cycle ); |
---|
1742 | #endif |
---|
1743 | |
---|
1744 | } // end process_init_create() |
---|
1745 | |
---|
1746 | ///////////////////////////////////////// |
---|
1747 | void process_display( xptr_t process_xp ) |
---|
1748 | { |
---|
1749 | process_t * process_ptr; |
---|
1750 | cxy_t process_cxy; |
---|
1751 | |
---|
1752 | xptr_t parent_xp; // extended pointer on parent process |
---|
1753 | process_t * parent_ptr; |
---|
1754 | cxy_t parent_cxy; |
---|
1755 | |
---|
1756 | xptr_t owner_xp; // extended pointer on owner process |
---|
1757 | process_t * owner_ptr; |
---|
1758 | cxy_t owner_cxy; |
---|
1759 | |
---|
1760 | pid_t pid; |
---|
1761 | pid_t ppid; |
---|
1762 | lpid_t lpid; |
---|
1763 | uint32_t state; |
---|
1764 | uint32_t th_nr; |
---|
1765 | |
---|
1766 | xptr_t txt_file_xp; // extended pointer on TXT_RX file descriptor |
---|
1767 | xptr_t txt_chdev_xp; // extended pointer on TXT_RX chdev |
---|
1768 | chdev_t * txt_chdev_ptr; |
---|
1769 | cxy_t txt_chdev_cxy; |
---|
1770 | xptr_t txt_owner_xp; // extended pointer on TXT owner process |
---|
1771 | |
---|
1772 | xptr_t elf_file_xp; // extended pointer on .elf file |
---|
1773 | cxy_t elf_file_cxy; |
---|
1774 | vfs_file_t * elf_file_ptr; |
---|
1775 | vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode |
---|
1776 | |
---|
1777 | char txt_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1778 | char elf_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1779 | |
---|
1780 | // get cluster and local pointer on process |
---|
1781 | process_ptr = GET_PTR( process_xp ); |
---|
1782 | process_cxy = GET_CXY( process_xp ); |
---|
1783 | |
---|
1784 | // get process PID, LPID, and state |
---|
1785 | pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
1786 | lpid = LPID_FROM_PID( pid ); |
---|
1787 | state = hal_remote_l32( XPTR( process_cxy , &process_ptr->term_state ) ); |
---|
1788 | |
---|
1789 | // get process PPID |
---|
1790 | parent_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) ); |
---|
1791 | parent_cxy = GET_CXY( parent_xp ); |
---|
1792 | parent_ptr = GET_PTR( parent_xp ); |
---|
1793 | ppid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
1794 | |
---|
1795 | // get number of threads |
---|
1796 | th_nr = hal_remote_l32( XPTR( process_cxy , &process_ptr->th_nr ) ); |
---|
1797 | |
---|
1798 | // get pointers on owner process descriptor |
---|
1799 | owner_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ) ); |
---|
1800 | owner_cxy = GET_CXY( owner_xp ); |
---|
1801 | owner_ptr = GET_PTR( owner_xp ); |
---|
1802 | |
---|
1803 | // get process TXT name and .elf name |
---|
1804 | if( lpid ) // user process |
---|
1805 | { |
---|
1806 | |
---|
1807 | // get extended pointer on file descriptor associated to TXT_RX |
---|
1808 | txt_file_xp = hal_remote_l64( XPTR( owner_cxy , &owner_ptr->fd_array.array[0] ) ); |
---|
1809 | |
---|
1810 | assert( (txt_file_xp != XPTR_NULL) , |
---|
1811 | "process must be attached to one TXT terminal\n" ); |
---|
1812 | |
---|
1813 | // get TXT_RX chdev pointers |
---|
1814 | txt_chdev_xp = chdev_from_file( txt_file_xp ); |
---|
1815 | txt_chdev_cxy = GET_CXY( txt_chdev_xp ); |
---|
1816 | txt_chdev_ptr = GET_PTR( txt_chdev_xp ); |
---|
1817 | |
---|
1818 | // get TXT_RX name and ownership |
---|
1819 | hal_remote_strcpy( XPTR( local_cxy , txt_name ) , |
---|
1820 | XPTR( txt_chdev_cxy , txt_chdev_ptr->name ) ); |
---|
1821 | |
---|
1822 | txt_owner_xp = (xptr_t)hal_remote_l64( XPTR( txt_chdev_cxy, |
---|
1823 | &txt_chdev_ptr->ext.txt.owner_xp ) ); |
---|
1824 | |
---|
1825 | // get process .elf name |
---|
1826 | elf_file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) ); |
---|
1827 | elf_file_cxy = GET_CXY( elf_file_xp ); |
---|
1828 | elf_file_ptr = GET_PTR( elf_file_xp ); |
---|
1829 | elf_inode_ptr = hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) ); |
---|
1830 | vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name ); |
---|
1831 | } |
---|
1832 | else // kernel process_zero |
---|
1833 | { |
---|
1834 | // TXT name and .elf name are not registered in kernel process_zero |
---|
1835 | strcpy( txt_name , "txt0_rx" ); |
---|
1836 | txt_owner_xp = process_xp; |
---|
1837 | strcpy( elf_name , "kernel.elf" ); |
---|
1838 | } |
---|
1839 | |
---|
1840 | // display process info |
---|
1841 | if( txt_owner_xp == process_xp ) |
---|
1842 | { |
---|
1843 | nolock_printk("PID %X | %s (FG) | %X | PPID %X | TS %X | %d | %s\n", |
---|
1844 | pid, txt_name, process_ptr, ppid, state, th_nr, elf_name ); |
---|
1845 | } |
---|
1846 | else |
---|
1847 | { |
---|
1848 | nolock_printk("PID %X | %s (BG) | %X | PPID %X | TS %X | %d | %s\n", |
---|
1849 | pid, txt_name, process_ptr, ppid, state, th_nr, elf_name ); |
---|
1850 | } |
---|
1851 | } // end process_display() |
---|
1852 | |
---|
1853 | |
---|
1854 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
1855 | // Terminals related functions |
---|
1856 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
1857 | |
---|
1858 | ////////////////////////////////// |
---|
1859 | uint32_t process_txt_alloc( void ) |
---|
1860 | { |
---|
1861 | uint32_t index; // TXT terminal index |
---|
1862 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1863 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
1864 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
1865 | xptr_t root_xp; // extended pointer on owner field in chdev |
---|
1866 | |
---|
1867 | // scan the user TXT_RX chdevs (TXT0 is reserved for kernel) |
---|
1868 | for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ ) |
---|
1869 | { |
---|
1870 | // get pointers on TXT_RX[index] |
---|
1871 | chdev_xp = chdev_dir.txt_rx[index]; |
---|
1872 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1873 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
1874 | |
---|
1875 | // get extended pointer on root of attached process |
---|
1876 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
1877 | |
---|
1878 | // return free TXT index if found |
---|
1879 | if( xlist_is_empty( root_xp ) ) return index; |
---|
1880 | } |
---|
1881 | |
---|
1882 | assert( false , "no free TXT terminal found" ); |
---|
1883 | |
---|
1884 | return -1; |
---|
1885 | |
---|
1886 | } // end process_txt_alloc() |
---|
1887 | |
---|
1888 | ///////////////////////////////////////////// |
---|
1889 | void process_txt_attach( process_t * process, |
---|
1890 | uint32_t txt_id ) |
---|
1891 | { |
---|
1892 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1893 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
1894 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
1895 | xptr_t root_xp; // extended pointer on list root in chdev |
---|
1896 | xptr_t lock_xp; // extended pointer on list lock in chdev |
---|
1897 | |
---|
1898 | // check process is in owner cluster |
---|
1899 | assert( (CXY_FROM_PID( process->pid ) == local_cxy) , |
---|
1900 | "process descriptor not in owner cluster" ); |
---|
1901 | |
---|
1902 | // check terminal index |
---|
1903 | assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) , |
---|
1904 | "illegal TXT terminal index" ); |
---|
1905 | |
---|
1906 | // get pointers on TXT_RX[txt_id] chdev |
---|
1907 | chdev_xp = chdev_dir.txt_rx[txt_id]; |
---|
1908 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1909 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
1910 | |
---|
1911 | // get extended pointer on root & lock of attached process list |
---|
1912 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
1913 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
1914 | |
---|
1915 | // get lock protecting list of processes attached to TXT |
---|
1916 | remote_busylock_acquire( lock_xp ); |
---|
1917 | |
---|
1918 | // insert process in attached process list |
---|
1919 | xlist_add_last( root_xp , XPTR( local_cxy , &process->txt_list ) ); |
---|
1920 | |
---|
1921 | // release lock protecting list of processes attached to TXT |
---|
1922 | remote_busylock_release( lock_xp ); |
---|
1923 | |
---|
1924 | #if DEBUG_PROCESS_TXT |
---|
1925 | thread_t * this = CURRENT_THREAD; |
---|
1926 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1927 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
1928 | printk("\n[%s] thread[%x,%x] attached process %x to TXT %d / cycle %d\n", |
---|
1929 | __FUNCTION__, this->process->pid, this->trdid, process->pid, txt_id , cycle ); |
---|
1930 | #endif |
---|
1931 | |
---|
1932 | } // end process_txt_attach() |
---|
1933 | |
---|
1934 | ///////////////////////////////////////////// |
---|
1935 | void process_txt_detach( xptr_t process_xp ) |
---|
1936 | { |
---|
1937 | process_t * process_ptr; // local pointer on process in owner cluster |
---|
1938 | cxy_t process_cxy; // process owner cluster |
---|
1939 | pid_t process_pid; // process identifier |
---|
1940 | xptr_t file_xp; // extended pointer on stdin file |
---|
1941 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1942 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
1943 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
1944 | xptr_t lock_xp; // extended pointer on list lock in chdev |
---|
1945 | |
---|
1946 | // get process cluster, local pointer, and PID |
---|
1947 | process_cxy = GET_CXY( process_xp ); |
---|
1948 | process_ptr = GET_PTR( process_xp ); |
---|
1949 | process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
1950 | |
---|
1951 | // check process descriptor in owner cluster |
---|
1952 | assert( (CXY_FROM_PID( process_pid ) == process_cxy ) , |
---|
1953 | "process descriptor not in owner cluster" ); |
---|
1954 | |
---|
1955 | // release TXT ownership (does nothing if not TXT owner) |
---|
1956 | process_txt_transfer_ownership( process_xp ); |
---|
1957 | |
---|
1958 | // get extended pointer on process stdin file |
---|
1959 | file_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
1960 | |
---|
1961 | // get pointers on TXT_RX chdev |
---|
1962 | chdev_xp = chdev_from_file( file_xp ); |
---|
1963 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1964 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
1965 | |
---|
1966 | // get extended pointer on lock protecting attached process list |
---|
1967 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
1968 | |
---|
1969 | // get lock protecting list of processes attached to TXT |
---|
1970 | remote_busylock_acquire( lock_xp ); |
---|
1971 | |
---|
1972 | // unlink process from attached process list |
---|
1973 | xlist_unlink( XPTR( process_cxy , &process_ptr->txt_list ) ); |
---|
1974 | |
---|
1975 | // release lock protecting list of processes attached to TXT |
---|
1976 | remote_busylock_release( lock_xp ); |
---|
1977 | |
---|
1978 | #if DEBUG_PROCESS_TXT |
---|
1979 | thread_t * this = CURRENT_THREAD; |
---|
1980 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1981 | uint32_t txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) ); |
---|
1982 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
1983 | printk("\n[%s] thread[%x,%x] detached process %x from TXT %d / cycle %d\n", |
---|
1984 | __FUNCTION__, this->process->pid, this->trdid, process_pid, txt_id, cycle ); |
---|
1985 | #endif |
---|
1986 | |
---|
1987 | } // end process_txt_detach() |
---|
1988 | |
---|
1989 | /////////////////////////////////////////////////// |
---|
1990 | void process_txt_set_ownership( xptr_t process_xp ) |
---|
1991 | { |
---|
1992 | process_t * process_ptr; |
---|
1993 | cxy_t process_cxy; |
---|
1994 | pid_t process_pid; |
---|
1995 | xptr_t file_xp; |
---|
1996 | xptr_t txt_xp; |
---|
1997 | chdev_t * txt_ptr; |
---|
1998 | cxy_t txt_cxy; |
---|
1999 | |
---|
2000 | // get pointers on process in owner cluster |
---|
2001 | process_cxy = GET_CXY( process_xp ); |
---|
2002 | process_ptr = GET_PTR( process_xp ); |
---|
2003 | process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
2004 | |
---|
2005 | // check owner cluster |
---|
2006 | assert( (process_cxy == CXY_FROM_PID( process_pid )) , |
---|
2007 | "process descriptor not in owner cluster\n" ); |
---|
2008 | |
---|
2009 | // get extended pointer on stdin pseudo file |
---|
2010 | file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
2011 | |
---|
2012 | // get pointers on TXT chdev |
---|
2013 | txt_xp = chdev_from_file( file_xp ); |
---|
2014 | txt_cxy = GET_CXY( txt_xp ); |
---|
2015 | txt_ptr = GET_PTR( txt_xp ); |
---|
2016 | |
---|
2017 | // set owner field in TXT chdev |
---|
2018 | hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp ); |
---|
2019 | |
---|
2020 | #if DEBUG_PROCESS_TXT |
---|
2021 | thread_t * this = CURRENT_THREAD; |
---|
2022 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
2023 | uint32_t txt_id = hal_remote_l32( XPTR( txt_cxy , &txt_ptr->channel ) ); |
---|
2024 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
2025 | printk("\n[%s] thread[%x,%x] give TXT %d to process %x / cycle %d\n", |
---|
2026 | __FUNCTION__, this->process->pid, this->trdid, txt_id, process_pid, cycle ); |
---|
2027 | #endif |
---|
2028 | |
---|
2029 | } // end process_txt_set ownership() |
---|
2030 | |
---|
2031 | //////////////////////////////////////////////////////// |
---|
2032 | void process_txt_transfer_ownership( xptr_t process_xp ) |
---|
2033 | { |
---|
2034 | process_t * process_ptr; // local pointer on process releasing ownership |
---|
2035 | cxy_t process_cxy; // process cluster |
---|
2036 | pid_t process_pid; // process identifier |
---|
2037 | xptr_t file_xp; // extended pointer on TXT_RX pseudo file |
---|
2038 | xptr_t txt_xp; // extended pointer on TXT_RX chdev |
---|
2039 | chdev_t * txt_ptr; // local pointer on TXT_RX chdev |
---|
2040 | cxy_t txt_cxy; // cluster of TXT_RX chdev |
---|
2041 | uint32_t txt_id; // TXT_RX channel |
---|
2042 | xptr_t owner_xp; // extended pointer on current TXT_RX owner |
---|
2043 | xptr_t root_xp; // extended pointer on root of attached process list |
---|
2044 | xptr_t lock_xp; // extended pointer on lock protecting attached process list |
---|
2045 | xptr_t iter_xp; // iterator for xlist |
---|
2046 | xptr_t current_xp; // extended pointer on current process |
---|
2047 | process_t * current_ptr; // local pointer on current process |
---|
2048 | cxy_t current_cxy; // cluster for current process |
---|
2049 | |
---|
2050 | #if DEBUG_PROCESS_TXT |
---|
2051 | thread_t * this = CURRENT_THREAD; |
---|
2052 | uint32_t cycle; |
---|
2053 | #endif |
---|
2054 | |
---|
2055 | // get pointers on process in owner cluster |
---|
2056 | process_cxy = GET_CXY( process_xp ); |
---|
2057 | process_ptr = GET_PTR( process_xp ); |
---|
2058 | process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
2059 | |
---|
2060 | // check owner cluster |
---|
2061 | assert( (process_cxy == CXY_FROM_PID( process_pid )) , |
---|
2062 | "process descriptor not in owner cluster\n" ); |
---|
2063 | |
---|
2064 | // get extended pointer on stdin pseudo file |
---|
2065 | file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
2066 | |
---|
2067 | // get pointers on TXT chdev |
---|
2068 | txt_xp = chdev_from_file( file_xp ); |
---|
2069 | txt_cxy = GET_CXY( txt_xp ); |
---|
2070 | txt_ptr = GET_PTR( txt_xp ); |
---|
2071 | |
---|
2072 | // get extended pointer on TXT_RX owner and TXT channel |
---|
2073 | owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) ); |
---|
2074 | txt_id = hal_remote_l32 ( XPTR( txt_cxy , &txt_ptr->channel ) ); |
---|
2075 | |
---|
2076 | // transfer ownership only if process is the TXT owner |
---|
2077 | if( (owner_xp == process_xp) && (txt_id > 0) ) |
---|
2078 | { |
---|
2079 | // get extended pointers on root and lock of attached processes list |
---|
2080 | root_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.root ); |
---|
2081 | lock_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.lock ); |
---|
2082 | |
---|
2083 | // get lock |
---|
2084 | remote_busylock_acquire( lock_xp ); |
---|
2085 | |
---|
2086 | if( process_get_ppid( process_xp ) != 1 ) // process is not KSH |
---|
2087 | { |
---|
2088 | // scan attached process list to find KSH process |
---|
2089 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
2090 | { |
---|
2091 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
2092 | current_cxy = GET_CXY( current_xp ); |
---|
2093 | current_ptr = GET_PTR( current_xp ); |
---|
2094 | |
---|
2095 | if( process_get_ppid( current_xp ) == 1 ) // current is KSH |
---|
2096 | { |
---|
2097 | // release lock |
---|
2098 | remote_busylock_release( lock_xp ); |
---|
2099 | |
---|
2100 | // set owner field in TXT chdev |
---|
2101 | hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp ); |
---|
2102 | |
---|
2103 | #if DEBUG_PROCESS_TXT |
---|
2104 | cycle = (uint32_t)hal_get_cycles(); |
---|
2105 | uint32_t ksh_pid = hal_remote_l32( XPTR( current_cxy , ¤t_ptr->pid ) ); |
---|
2106 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
2107 | printk("\n[%s] thread[%x,%x] release TXT %d to KSH %x / cycle %d\n", |
---|
2108 | __FUNCTION__, this->process->pid, this->trdid, txt_id, ksh_pid, cycle ); |
---|
2109 | process_txt_display( txt_id ); |
---|
2110 | #endif |
---|
2111 | return; |
---|
2112 | } |
---|
2113 | } |
---|
2114 | |
---|
2115 | // release lock |
---|
2116 | remote_busylock_release( lock_xp ); |
---|
2117 | |
---|
2118 | // PANIC if KSH not found |
---|
2119 | assert( false , "KSH process not found for TXT %d" ); |
---|
2120 | |
---|
2121 | return; |
---|
2122 | } |
---|
2123 | else // process is KSH |
---|
2124 | { |
---|
2125 | // scan attached process list to find another process |
---|
2126 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
2127 | { |
---|
2128 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
2129 | current_cxy = GET_CXY( current_xp ); |
---|
2130 | current_ptr = GET_PTR( current_xp ); |
---|
2131 | |
---|
2132 | if( current_xp != process_xp ) // current is not KSH |
---|
2133 | { |
---|
2134 | // release lock |
---|
2135 | remote_busylock_release( lock_xp ); |
---|
2136 | |
---|
2137 | // set owner field in TXT chdev |
---|
2138 | hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp ); |
---|
2139 | |
---|
2140 | #if DEBUG_PROCESS_TXT |
---|
2141 | cycle = (uint32_t)hal_get_cycles(); |
---|
2142 | uint32_t new_pid = hal_remote_l32( XPTR( current_cxy , ¤t_ptr->pid ) ); |
---|
2143 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
2144 | printk("\n[%s] thread[%x,%x] release TXT %d to process %x / cycle %d\n", |
---|
2145 | __FUNCTION__,this->process->pid, this->trdid, txt_id, new_pid, cycle ); |
---|
2146 | process_txt_display( txt_id ); |
---|
2147 | #endif |
---|
2148 | return; |
---|
2149 | } |
---|
2150 | } |
---|
2151 | |
---|
2152 | // release lock |
---|
2153 | remote_busylock_release( lock_xp ); |
---|
2154 | |
---|
2155 | // no more owner for TXT if no other process found |
---|
2156 | hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , XPTR_NULL ); |
---|
2157 | |
---|
2158 | #if DEBUG_PROCESS_TXT |
---|
2159 | cycle = (uint32_t)hal_get_cycles(); |
---|
2160 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
2161 | printk("\n[%s] thread[%x,%x] release TXT %d to nobody / cycle %d\n", |
---|
2162 | __FUNCTION__, this->process->pid, this->trdid, txt_id, cycle ); |
---|
2163 | process_txt_display( txt_id ); |
---|
2164 | #endif |
---|
2165 | return; |
---|
2166 | } |
---|
2167 | } |
---|
2168 | else |
---|
2169 | { |
---|
2170 | |
---|
2171 | #if DEBUG_PROCESS_TXT |
---|
2172 | cycle = (uint32_t)hal_get_cycles(); |
---|
2173 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
2174 | printk("\n[%s] thread %x in process %d does nothing (not TXT owner) / cycle %d\n", |
---|
2175 | __FUNCTION__, this->trdid, process_pid, cycle ); |
---|
2176 | process_txt_display( txt_id ); |
---|
2177 | #endif |
---|
2178 | |
---|
2179 | } |
---|
2180 | } // end process_txt_transfer_ownership() |
---|
2181 | |
---|
2182 | |
---|
2183 | //////////////////////////////////////////////// |
---|
2184 | bool_t process_txt_is_owner( xptr_t process_xp ) |
---|
2185 | { |
---|
2186 | // get local pointer and cluster of process in owner cluster |
---|
2187 | cxy_t process_cxy = GET_CXY( process_xp ); |
---|
2188 | process_t * process_ptr = GET_PTR( process_xp ); |
---|
2189 | |
---|
2190 | // check calling thread execute in target process owner cluster |
---|
2191 | pid_t process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
2192 | assert( (process_cxy == CXY_FROM_PID( process_pid )) , |
---|
2193 | "process descriptor not in owner cluster\n" ); |
---|
2194 | |
---|
2195 | // get extended pointer on stdin pseudo file |
---|
2196 | xptr_t file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
2197 | |
---|
2198 | // get pointers on TXT chdev |
---|
2199 | xptr_t txt_xp = chdev_from_file( file_xp ); |
---|
2200 | cxy_t txt_cxy = GET_CXY( txt_xp ); |
---|
2201 | chdev_t * txt_ptr = GET_PTR( txt_xp ); |
---|
2202 | |
---|
2203 | // get extended pointer on TXT_RX owner process |
---|
2204 | xptr_t owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) ); |
---|
2205 | |
---|
2206 | return (process_xp == owner_xp); |
---|
2207 | |
---|
2208 | } // end process_txt_is_owner() |
---|
2209 | |
---|
2210 | //////////////////////////////////////////////// |
---|
2211 | xptr_t process_txt_get_owner( uint32_t channel ) |
---|
2212 | { |
---|
2213 | xptr_t txt_rx_xp = chdev_dir.txt_rx[channel]; |
---|
2214 | cxy_t txt_rx_cxy = GET_CXY( txt_rx_xp ); |
---|
2215 | chdev_t * txt_rx_ptr = GET_PTR( txt_rx_xp ); |
---|
2216 | |
---|
2217 | return (xptr_t)hal_remote_l64( XPTR( txt_rx_cxy , &txt_rx_ptr->ext.txt.owner_xp ) ); |
---|
2218 | |
---|
2219 | } // end process_txt_get_owner() |
---|
2220 | |
---|
2221 | /////////////////////////////////////////// |
---|
2222 | void process_txt_display( uint32_t txt_id ) |
---|
2223 | { |
---|
2224 | xptr_t chdev_xp; |
---|
2225 | cxy_t chdev_cxy; |
---|
2226 | chdev_t * chdev_ptr; |
---|
2227 | xptr_t root_xp; |
---|
2228 | xptr_t lock_xp; |
---|
2229 | xptr_t current_xp; |
---|
2230 | xptr_t iter_xp; |
---|
2231 | cxy_t txt0_cxy; |
---|
2232 | chdev_t * txt0_ptr; |
---|
2233 | xptr_t txt0_xp; |
---|
2234 | xptr_t txt0_lock_xp; |
---|
2235 | |
---|
2236 | assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) , |
---|
2237 | "illegal TXT terminal index" ); |
---|
2238 | |
---|
2239 | // get pointers on TXT0 chdev |
---|
2240 | txt0_xp = chdev_dir.txt_tx[0]; |
---|
2241 | txt0_cxy = GET_CXY( txt0_xp ); |
---|
2242 | txt0_ptr = GET_PTR( txt0_xp ); |
---|
2243 | |
---|
2244 | // get extended pointer on TXT0 lock |
---|
2245 | txt0_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
---|
2246 | |
---|
2247 | // get pointers on TXT_RX[txt_id] chdev |
---|
2248 | chdev_xp = chdev_dir.txt_rx[txt_id]; |
---|
2249 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
2250 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
2251 | |
---|
2252 | // get extended pointer on root & lock of attached process list |
---|
2253 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
2254 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
2255 | |
---|
2256 | // get lock on attached process list |
---|
2257 | remote_busylock_acquire( lock_xp ); |
---|
2258 | |
---|
2259 | // get TXT0 lock in busy waiting mode |
---|
2260 | remote_busylock_acquire( txt0_lock_xp ); |
---|
2261 | |
---|
2262 | // display header |
---|
2263 | nolock_printk("\n***** processes attached to TXT_%d / cycle %d\n", |
---|
2264 | txt_id , (uint32_t)hal_get_cycles() ); |
---|
2265 | |
---|
2266 | // scan attached process list |
---|
2267 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
2268 | { |
---|
2269 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
2270 | process_display( current_xp ); |
---|
2271 | } |
---|
2272 | |
---|
2273 | // release TXT0 lock in busy waiting mode |
---|
2274 | remote_busylock_release( txt0_lock_xp ); |
---|
2275 | |
---|
2276 | // release lock on attached process list |
---|
2277 | remote_busylock_release( lock_xp ); |
---|
2278 | |
---|
2279 | } // end process_txt_display |
---|