[1] | 1 | /* |
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| 2 | * process.c - process related management |
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[172] | 3 | * |
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[1] | 4 | * Authors Ghassan Almaless (2008,2009,2010,2011,2012) |
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| 5 | * Mohamed Lamine Karaoui (2015) |
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[433] | 6 | * Alain Greiner (2016,2017,2018) |
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[1] | 7 | * |
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| 8 | * Copyright (c) UPMC Sorbonne Universites |
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| 9 | * |
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[409] | 10 | * This file is part of ALMOS-MKH. |
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[1] | 11 | * |
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[172] | 12 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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[1] | 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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[172] | 16 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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[1] | 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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[172] | 22 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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[1] | 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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[14] | 26 | #include <kernel_config.h> |
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[1] | 27 | #include <hal_types.h> |
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| 28 | #include <hal_remote.h> |
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| 29 | #include <hal_uspace.h> |
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[409] | 30 | #include <hal_irqmask.h> |
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[1] | 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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[428] | 41 | #include <chdev.h> |
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[1] | 42 | #include <list.h> |
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[407] | 43 | #include <string.h> |
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[1] | 44 | #include <scheduler.h> |
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| 45 | #include <remote_spinlock.h> |
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| 46 | #include <dqdt.h> |
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| 47 | #include <cluster.h> |
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| 48 | #include <ppm.h> |
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| 49 | #include <boot_info.h> |
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| 50 | #include <process.h> |
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| 51 | #include <elf.h> |
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[23] | 52 | #include <syscalls.h> |
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[435] | 53 | #include <shared_syscalls.h> |
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[1] | 54 | |
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| 55 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 56 | // Extern global variables |
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| 57 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 58 | |
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[428] | 59 | extern process_t process_zero; // allocated in kernel_init.c |
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| 60 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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[1] | 61 | |
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| 62 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 63 | // Process initialisation related functions |
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| 64 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 65 | |
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| 66 | /////////////////////////// |
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| 67 | process_t * process_alloc() |
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| 68 | { |
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| 69 | kmem_req_t req; |
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| 70 | |
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| 71 | req.type = KMEM_PROCESS; |
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| 72 | req.size = sizeof(process_t); |
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| 73 | req.flags = AF_KERNEL; |
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| 74 | |
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| 75 | return (process_t *)kmem_alloc( &req ); |
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| 76 | } |
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| 77 | |
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| 78 | //////////////////////////////////////// |
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| 79 | void process_free( process_t * process ) |
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| 80 | { |
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| 81 | kmem_req_t req; |
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| 82 | |
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| 83 | req.type = KMEM_PROCESS; |
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| 84 | req.ptr = process; |
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| 85 | kmem_free( &req ); |
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| 86 | } |
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| 87 | |
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[101] | 88 | ///////////////////////////////////////////////// |
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| 89 | void process_reference_init( process_t * process, |
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| 90 | pid_t pid, |
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[428] | 91 | xptr_t parent_xp, |
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[408] | 92 | xptr_t model_xp ) |
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[1] | 93 | { |
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[428] | 94 | cxy_t parent_cxy; |
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| 95 | process_t * parent_ptr; |
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[408] | 96 | cxy_t model_cxy; |
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| 97 | process_t * model_ptr; |
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[407] | 98 | xptr_t stdin_xp; |
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| 99 | xptr_t stdout_xp; |
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| 100 | xptr_t stderr_xp; |
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| 101 | uint32_t stdin_id; |
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| 102 | uint32_t stdout_id; |
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| 103 | uint32_t stderr_id; |
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[415] | 104 | error_t error; |
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[428] | 105 | uint32_t txt_id; |
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| 106 | char rx_path[40]; |
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| 107 | char tx_path[40]; |
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[440] | 108 | xptr_t file_xp; |
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[428] | 109 | xptr_t chdev_xp; |
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| 110 | chdev_t * chdev_ptr; |
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| 111 | cxy_t chdev_cxy; |
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| 112 | pid_t model_pid; |
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| 113 | pid_t parent_pid; |
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[1] | 114 | |
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[408] | 115 | // get model process cluster and local pointer |
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| 116 | model_cxy = GET_CXY( model_xp ); |
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[435] | 117 | model_ptr = GET_PTR( model_xp ); |
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[1] | 118 | |
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[428] | 119 | // get parent process cluster and local pointer |
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| 120 | parent_cxy = GET_CXY( parent_xp ); |
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[435] | 121 | parent_ptr = GET_PTR( parent_xp ); |
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[204] | 122 | |
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[428] | 123 | // get model_pid and parent_pid |
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| 124 | parent_pid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
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| 125 | model_pid = hal_remote_lw( XPTR( model_cxy , &model_ptr->pid ) ); |
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| 126 | |
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[438] | 127 | #if DEBUG_PROCESS_REFERENCE_INIT |
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[433] | 128 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 129 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[433] | 130 | printk("\n[DBG] %s : thread %x enter / pid = %x / ppid = %x / model_pid = %x / cycle %d\n", |
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| 131 | __FUNCTION__ , CURRENT_THREAD , pid , parent_pid , model_pid , cycle ); |
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| 132 | #endif |
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[428] | 133 | |
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| 134 | // initialize PID, REF_XP, PARENT_XP, and STATE |
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[433] | 135 | process->pid = pid; |
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| 136 | process->ref_xp = XPTR( local_cxy , process ); |
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| 137 | process->parent_xp = parent_xp; |
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| 138 | process->term_state = 0; |
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[428] | 139 | |
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[409] | 140 | // initialize vmm as empty |
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[415] | 141 | error = vmm_init( process ); |
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| 142 | assert( (error == 0) , __FUNCTION__ , "cannot initialize VMM\n" ); |
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| 143 | |
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[438] | 144 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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[433] | 145 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 146 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[433] | 147 | printk("\n[DBG] %s : thread %x / vmm empty for process %x / cycle %d\n", |
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| 148 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
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| 149 | #endif |
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[1] | 150 | |
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[409] | 151 | // initialize fd_array as empty |
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[408] | 152 | process_fd_init( process ); |
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[1] | 153 | |
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[428] | 154 | // define the stdin/stdout/stderr pseudo files <=> select a TXT terminal. |
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| 155 | // - if INIT (pid == 1) => link to kernel TXT[0] |
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| 156 | // - if KSH[i] (model_pid == 1) => allocate a free TXT[i] |
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| 157 | // - if USER process => same terminal as model |
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| 158 | |
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| 159 | if( (pid == 1) || (model_pid == 1)) // INIT or KSH process |
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[408] | 160 | { |
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[428] | 161 | if (pid == 1 ) txt_id = 0; // INIT |
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| 162 | else txt_id = process_txt_alloc(); // KSH[i] |
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| 163 | |
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| 164 | // attach process to TXT[txt_id] |
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| 165 | process_txt_attach( process , txt_id ); |
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| 166 | |
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| 167 | // build path to TXT_RX[i] and TXT_TX[i] chdevs |
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| 168 | snprintf( rx_path , 40 , "/dev/external/txt%d_rx", txt_id ); |
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| 169 | snprintf( tx_path , 40 , "/dev/external/txt%d_tx", txt_id ); |
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| 170 | |
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| 171 | // create stdin pseudo file |
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| 172 | error = vfs_open( process, |
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| 173 | rx_path, |
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[408] | 174 | O_RDONLY, |
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| 175 | 0, // FIXME chmod |
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| 176 | &stdin_xp, |
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| 177 | &stdin_id ); |
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[1] | 178 | |
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[428] | 179 | assert( (error == 0) , __FUNCTION__ , "cannot open stdin pseudo file" ); |
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| 180 | assert( (stdin_id == 0) , __FUNCTION__ , "stdin index must be 0" ); |
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| 181 | |
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[440] | 182 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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| 183 | cycle = (uint32_t)hal_get_cycles(); |
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| 184 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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| 185 | printk("\n[DBG] %s : thread %x / stdin open for process %x / cycle %d\n", |
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| 186 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
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| 187 | #endif |
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| 188 | |
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[428] | 189 | // create stdout pseudo file |
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| 190 | error = vfs_open( process, |
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| 191 | tx_path, |
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[408] | 192 | O_WRONLY, |
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| 193 | 0, // FIXME chmod |
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| 194 | &stdout_xp, |
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| 195 | &stdout_id ); |
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[1] | 196 | |
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[428] | 197 | assert( (error == 0) , __FUNCTION__ , "cannot open stdout pseudo file" ); |
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| 198 | assert( (stdout_id == 1) , __FUNCTION__ , "stdout index must be 1" ); |
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| 199 | |
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[440] | 200 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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| 201 | cycle = (uint32_t)hal_get_cycles(); |
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| 202 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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| 203 | printk("\n[DBG] %s : thread %x / stdout open for process %x / cycle %d\n", |
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| 204 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
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| 205 | #endif |
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| 206 | |
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[428] | 207 | // create stderr pseudo file |
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| 208 | error = vfs_open( process, |
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| 209 | tx_path, |
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[408] | 210 | O_WRONLY, |
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| 211 | 0, // FIXME chmod |
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| 212 | &stderr_xp, |
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| 213 | &stderr_id ); |
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[428] | 214 | |
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| 215 | assert( (error == 0) , __FUNCTION__ , "cannot open stderr pseudo file" ); |
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| 216 | assert( (stderr_id == 2) , __FUNCTION__ , "stderr index must be 2" ); |
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| 217 | |
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[440] | 218 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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| 219 | cycle = (uint32_t)hal_get_cycles(); |
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| 220 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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| 221 | printk("\n[DBG] %s : thread %x / stderr open for process %x / cycle %d\n", |
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| 222 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
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| 223 | #endif |
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| 224 | |
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[408] | 225 | } |
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[428] | 226 | else // normal user process |
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[408] | 227 | { |
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[440] | 228 | // get extended pointer on stdin pseudo file in model process |
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| 229 | file_xp = (xptr_t)hal_remote_lwd( XPTR( model_cxy , &model_ptr->fd_array.array[0] ) ); |
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| 230 | |
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[428] | 231 | // get extended pointer on model process TXT chdev |
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[440] | 232 | chdev_xp = chdev_from_file( file_xp ); |
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[428] | 233 | |
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| 234 | // get cluster and local pointer on chdev |
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| 235 | chdev_cxy = GET_CXY( chdev_xp ); |
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[435] | 236 | chdev_ptr = GET_PTR( chdev_xp ); |
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[428] | 237 | |
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| 238 | // get TXT terminal index |
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| 239 | txt_id = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->channel ) ); |
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[407] | 240 | |
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[428] | 241 | // attach process to TXT[txt_id] |
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| 242 | process_txt_attach( process , txt_id ); |
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[407] | 243 | |
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[428] | 244 | // copy all open files from model process fd_array to this process |
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| 245 | process_fd_remote_copy( XPTR( local_cxy , &process->fd_array ), |
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| 246 | XPTR( model_cxy , &model_ptr->fd_array ) ); |
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[408] | 247 | } |
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[407] | 248 | |
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[409] | 249 | // initialize specific inodes root and cwd |
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[408] | 250 | process->vfs_root_xp = (xptr_t)hal_remote_lwd( XPTR( model_cxy, |
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| 251 | &model_ptr->vfs_root_xp ) ); |
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| 252 | process->vfs_cwd_xp = (xptr_t)hal_remote_lwd( XPTR( model_cxy, |
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| 253 | &model_ptr->vfs_cwd_xp ) ); |
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[409] | 254 | vfs_inode_remote_up( process->vfs_root_xp ); |
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| 255 | vfs_inode_remote_up( process->vfs_cwd_xp ); |
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[408] | 256 | |
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[409] | 257 | remote_rwlock_init( XPTR( local_cxy , &process->cwd_lock ) ); |
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| 258 | |
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[438] | 259 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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[433] | 260 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 261 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[433] | 262 | printk("\n[DBG] %s : thread %x / fd_array for process %x / cycle %d\n", |
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| 263 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
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| 264 | #endif |
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[407] | 265 | |
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[408] | 266 | // reset children list root |
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| 267 | xlist_root_init( XPTR( local_cxy , &process->children_root ) ); |
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| 268 | process->children_nr = 0; |
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[428] | 269 | remote_spinlock_init( XPTR( local_cxy , &process->children_lock ) ); |
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[407] | 270 | |
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[408] | 271 | // reset semaphore / mutex / barrier / condvar list roots |
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| 272 | xlist_root_init( XPTR( local_cxy , &process->sem_root ) ); |
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| 273 | xlist_root_init( XPTR( local_cxy , &process->mutex_root ) ); |
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| 274 | xlist_root_init( XPTR( local_cxy , &process->barrier_root ) ); |
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| 275 | xlist_root_init( XPTR( local_cxy , &process->condvar_root ) ); |
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| 276 | remote_spinlock_init( XPTR( local_cxy , &process->sync_lock ) ); |
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[407] | 277 | |
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[408] | 278 | // register new process in the local cluster manager pref_tbl[] |
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| 279 | lpid_t lpid = LPID_FROM_PID( pid ); |
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| 280 | LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process ); |
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[407] | 281 | |
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[408] | 282 | // register new process descriptor in local cluster manager local_list |
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| 283 | cluster_process_local_link( process ); |
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[407] | 284 | |
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[408] | 285 | // register new process descriptor in local cluster manager copies_list |
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| 286 | cluster_process_copies_link( process ); |
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[172] | 287 | |
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[408] | 288 | // reset th_tbl[] array as empty in process descriptor |
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[1] | 289 | uint32_t i; |
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| 290 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
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| 291 | { |
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| 292 | process->th_tbl[i] = NULL; |
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| 293 | } |
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| 294 | process->th_nr = 0; |
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| 295 | spinlock_init( &process->th_lock ); |
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| 296 | |
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[124] | 297 | hal_fence(); |
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[1] | 298 | |
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[438] | 299 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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[433] | 300 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 301 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[433] | 302 | printk("\n[DBG] %s : thread %x exit / process %x / cycle %d\n", |
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| 303 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
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| 304 | #endif |
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[101] | 305 | |
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[428] | 306 | } // process_reference_init() |
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[204] | 307 | |
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[1] | 308 | ///////////////////////////////////////////////////// |
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| 309 | error_t process_copy_init( process_t * local_process, |
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| 310 | xptr_t reference_process_xp ) |
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| 311 | { |
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[415] | 312 | error_t error; |
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| 313 | |
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[23] | 314 | // get reference process cluster and local pointer |
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| 315 | cxy_t ref_cxy = GET_CXY( reference_process_xp ); |
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[435] | 316 | process_t * ref_ptr = GET_PTR( reference_process_xp ); |
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[1] | 317 | |
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[428] | 318 | // initialize PID, REF_XP, PARENT_XP, and STATE |
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[433] | 319 | local_process->pid = hal_remote_lw( XPTR( ref_cxy , &ref_ptr->pid ) ); |
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| 320 | local_process->parent_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->parent_xp ) ); |
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| 321 | local_process->ref_xp = reference_process_xp; |
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| 322 | local_process->term_state = 0; |
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[407] | 323 | |
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[438] | 324 | #if DEBUG_PROCESS_COPY_INIT |
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[433] | 325 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 326 | if( DEBUG_PROCESS_COPY_INIT ) |
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[433] | 327 | printk("\n[DBG] %s : thread %x enter for process %x\n", |
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| 328 | __FUNCTION__ , CURRENT_THREAD , local_process->pid ); |
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| 329 | #endif |
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[407] | 330 | |
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[172] | 331 | // reset local process vmm |
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[415] | 332 | error = vmm_init( local_process ); |
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| 333 | assert( (error == 0) , __FUNCTION__ , "cannot initialize VMM\n"); |
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[1] | 334 | |
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[172] | 335 | // reset process file descriptors array |
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[23] | 336 | process_fd_init( local_process ); |
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[1] | 337 | |
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[23] | 338 | // reset vfs_root_xp / vfs_bin_xp / vfs_cwd_xp fields |
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| 339 | local_process->vfs_root_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) ); |
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| 340 | local_process->vfs_bin_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) ); |
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| 341 | local_process->vfs_cwd_xp = XPTR_NULL; |
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[1] | 342 | |
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| 343 | // reset children list root (not used in a process descriptor copy) |
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| 344 | xlist_root_init( XPTR( local_cxy , &local_process->children_root ) ); |
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[172] | 345 | local_process->children_nr = 0; |
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[428] | 346 | remote_spinlock_init( XPTR( local_cxy , &local_process->children_lock ) ); |
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[1] | 347 | |
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[428] | 348 | // reset children_list (not used in a process descriptor copy) |
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| 349 | xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) ); |
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[1] | 350 | |
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| 351 | // reset semaphores list root (not used in a process descriptor copy) |
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| 352 | xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) ); |
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[23] | 353 | xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) ); |
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| 354 | xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) ); |
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| 355 | xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) ); |
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[1] | 356 | |
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[23] | 357 | // reset th_tbl[] array as empty |
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[1] | 358 | uint32_t i; |
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| 359 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
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| 360 | { |
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| 361 | local_process->th_tbl[i] = NULL; |
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| 362 | } |
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| 363 | local_process->th_nr = 0; |
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| 364 | spinlock_init( &local_process->th_lock ); |
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| 365 | |
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| 366 | // register new process descriptor in local cluster manager local_list |
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| 367 | cluster_process_local_link( local_process ); |
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| 368 | |
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| 369 | // register new process descriptor in owner cluster manager copies_list |
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| 370 | cluster_process_copies_link( local_process ); |
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| 371 | |
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[124] | 372 | hal_fence(); |
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[1] | 373 | |
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[438] | 374 | #if DEBUG_PROCESS_COPY_INIT |
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[433] | 375 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 376 | if( DEBUG_PROCESS_COPY_INIT ) |
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[433] | 377 | printk("\n[DBG] %s : thread %x exit for process %x\n", |
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| 378 | __FUNCTION__ , CURRENT_THREAD , local_process->pid ); |
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| 379 | #endif |
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[279] | 380 | |
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[1] | 381 | return 0; |
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| 382 | |
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[204] | 383 | } // end process_copy_init() |
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| 384 | |
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[1] | 385 | /////////////////////////////////////////// |
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| 386 | void process_destroy( process_t * process ) |
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| 387 | { |
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[428] | 388 | xptr_t parent_xp; |
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| 389 | process_t * parent_ptr; |
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| 390 | cxy_t parent_cxy; |
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| 391 | xptr_t children_lock_xp; |
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[1] | 392 | |
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[437] | 393 | pid_t pid = process->pid; |
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| 394 | |
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[428] | 395 | assert( (process->th_nr == 0) , __FUNCTION__ , |
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[437] | 396 | "process %x in cluster %x has still active threads", pid , local_cxy ); |
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[428] | 397 | |
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[438] | 398 | #if DEBUG_PROCESS_DESTROY |
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[433] | 399 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 400 | if( DEBUG_PROCESS_DESTROY ) |
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[440] | 401 | printk("\n[DBG] %s : thread %x enter in cluster %x / pid %x / process %x / cycle %d\n", |
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| 402 | __FUNCTION__ , CURRENT_THREAD , pid , process , cycle ); |
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[433] | 403 | #endif |
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[428] | 404 | |
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[436] | 405 | // remove process from local_list in local cluster manager |
---|
| 406 | cluster_process_local_unlink( process ); |
---|
[1] | 407 | |
---|
[436] | 408 | // remove process from copies_list in owner cluster manager |
---|
| 409 | cluster_process_copies_unlink( process ); |
---|
[23] | 410 | |
---|
[436] | 411 | // remove process from children_list if process is in owner cluster |
---|
[437] | 412 | if( CXY_FROM_PID( pid ) == local_cxy ) |
---|
[428] | 413 | { |
---|
| 414 | // get pointers on parent process |
---|
| 415 | parent_xp = process->parent_xp; |
---|
| 416 | parent_cxy = GET_CXY( parent_xp ); |
---|
| 417 | parent_ptr = GET_PTR( parent_xp ); |
---|
| 418 | |
---|
| 419 | // get extended pointer on children_lock in parent process |
---|
| 420 | children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock ); |
---|
| 421 | |
---|
| 422 | // remove process from children_list |
---|
| 423 | remote_spinlock_lock( children_lock_xp ); |
---|
| 424 | xlist_unlink( XPTR( local_cxy , &process->children_list ) ); |
---|
| 425 | remote_spinlock_unlock( children_lock_xp ); |
---|
| 426 | } |
---|
| 427 | |
---|
[440] | 428 | // release the process PID to cluster manager if owner cluster |
---|
| 429 | if( CXY_FROM_PID( pid ) == local_cxy ) cluster_pid_release( pid ); |
---|
[416] | 430 | |
---|
[409] | 431 | // FIXME close all open files and update dirty [AG] |
---|
[23] | 432 | |
---|
[428] | 433 | // decrease refcount for bin file, root file and cwd file |
---|
[337] | 434 | if( process->vfs_bin_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_bin_xp ); |
---|
| 435 | if( process->vfs_root_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_root_xp ); |
---|
| 436 | if( process->vfs_cwd_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_cwd_xp ); |
---|
[1] | 437 | |
---|
| 438 | // Destroy VMM |
---|
| 439 | vmm_destroy( process ); |
---|
| 440 | |
---|
[416] | 441 | // release memory allocated to process descriptor |
---|
| 442 | process_free( process ); |
---|
[1] | 443 | |
---|
[438] | 444 | #if DEBUG_PROCESS_DESTROY |
---|
[433] | 445 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 446 | if( DEBUG_PROCESS_DESTROY ) |
---|
[433] | 447 | printk("\n[DBG] %s : thread %x exit / destroyed process %x (pid = %x) / cycle %d\n", |
---|
[437] | 448 | __FUNCTION__ , CURRENT_THREAD , process, pid, cycle ); |
---|
[433] | 449 | #endif |
---|
[428] | 450 | |
---|
[407] | 451 | } // end process_destroy() |
---|
| 452 | |
---|
[409] | 453 | ///////////////////////////////////////////////// |
---|
| 454 | char * process_action_str( uint32_t action_type ) |
---|
| 455 | { |
---|
| 456 | if ( action_type == BLOCK_ALL_THREADS ) return "BLOCK"; |
---|
| 457 | else if( action_type == UNBLOCK_ALL_THREADS ) return "UNBLOCK"; |
---|
| 458 | else if( action_type == DELETE_ALL_THREADS ) return "DELETE"; |
---|
| 459 | else return "undefined"; |
---|
| 460 | } |
---|
| 461 | |
---|
[435] | 462 | //////////////////////////////////////// |
---|
| 463 | void process_sigaction( pid_t pid, |
---|
[409] | 464 | uint32_t action_type ) |
---|
| 465 | { |
---|
| 466 | cxy_t owner_cxy; // owner cluster identifier |
---|
| 467 | lpid_t lpid; // process index in owner cluster |
---|
| 468 | cluster_t * cluster; // pointer on cluster manager |
---|
| 469 | xptr_t root_xp; // extended pointer on root of copies |
---|
| 470 | xptr_t lock_xp; // extended pointer on lock protecting copies |
---|
| 471 | xptr_t iter_xp; // iterator on copies list |
---|
| 472 | xptr_t process_xp; // extended pointer on process copy |
---|
| 473 | cxy_t process_cxy; // process copy cluster identifier |
---|
[436] | 474 | reg_t save_sr; // for critical section |
---|
| 475 | rpc_desc_t rpc; // shared RPC descriptor |
---|
[409] | 476 | |
---|
[435] | 477 | thread_t * client = CURRENT_THREAD; |
---|
| 478 | |
---|
[438] | 479 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 480 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 481 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[435] | 482 | printk("\n[DBG] %s : thread %x enter to %s process %x / cycle %d\n", |
---|
| 483 | __FUNCTION__ , client, process_action_str( action_type ) , pid , cycle ); |
---|
[433] | 484 | #endif |
---|
[409] | 485 | |
---|
[436] | 486 | // get pointer on local cluster manager |
---|
[416] | 487 | cluster = LOCAL_CLUSTER; |
---|
| 488 | |
---|
[409] | 489 | // get owner cluster identifier and process lpid |
---|
[435] | 490 | owner_cxy = CXY_FROM_PID( pid ); |
---|
| 491 | lpid = LPID_FROM_PID( pid ); |
---|
[409] | 492 | |
---|
[435] | 493 | // get root of list of copies, lock, and number of copies from owner cluster |
---|
[436] | 494 | root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] ); |
---|
| 495 | lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] ); |
---|
[435] | 496 | |
---|
[416] | 497 | // check action type |
---|
| 498 | assert( ((action_type == DELETE_ALL_THREADS ) || |
---|
| 499 | (action_type == BLOCK_ALL_THREADS ) || |
---|
[428] | 500 | (action_type == UNBLOCK_ALL_THREADS )), __FUNCTION__ , "illegal action type" ); |
---|
[416] | 501 | |
---|
[436] | 502 | // allocate a - shared - RPC descriptor in client thread stack |
---|
| 503 | // it can be shared because all parallel, non-blocking, server threads |
---|
| 504 | // use the same input arguments, and use the shared RPC response field |
---|
[416] | 505 | |
---|
[436] | 506 | // the client thread makes the following sequence: |
---|
| 507 | // 1. mask interrupts |
---|
| 508 | // 2. block itself |
---|
| 509 | // 3. send RPC requests to all copies |
---|
| 510 | // 4. unmask interrupts |
---|
| 511 | // 5. deschedule |
---|
| 512 | |
---|
| 513 | // mask IRQs |
---|
| 514 | hal_disable_irq( &save_sr); |
---|
| 515 | |
---|
| 516 | // client register blocking condition for itself |
---|
| 517 | thread_block( XPTR( local_cxy , client ) , THREAD_BLOCKED_RPC ); |
---|
| 518 | |
---|
[409] | 519 | // take the lock protecting the copies |
---|
| 520 | remote_spinlock_lock( lock_xp ); |
---|
| 521 | |
---|
[436] | 522 | // initialize shared RPC descriptor |
---|
[438] | 523 | rpc.responses = 0; |
---|
| 524 | rpc.blocking = false; |
---|
| 525 | rpc.index = RPC_PROCESS_SIGACTION; |
---|
| 526 | rpc.thread = client; |
---|
| 527 | rpc.lid = client->core->lid; |
---|
| 528 | rpc.args[0] = action_type; |
---|
| 529 | rpc.args[1] = pid; |
---|
[436] | 530 | |
---|
| 531 | // send RPCs to all clusters containing process copiess |
---|
[409] | 532 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
| 533 | { |
---|
[440] | 534 | // atomically increment responses counter |
---|
| 535 | hal_atomic_add( (void *)&rpc.responses , 1 ); |
---|
[409] | 536 | |
---|
[440] | 537 | process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list ); |
---|
| 538 | process_cxy = GET_CXY( process_xp ); |
---|
| 539 | |
---|
[438] | 540 | #if DEBUG_PROCESS_SIGACTION |
---|
| 541 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[436] | 542 | printk("\n[DBG] %s : send RPC to %s process %x in cluster %x\n", |
---|
| 543 | __FUNCTION__ , process_action_str( action_type ) , pid , process_cxy ); |
---|
[433] | 544 | #endif |
---|
[436] | 545 | // call RPC in target cluster |
---|
[435] | 546 | rpc_process_sigaction_client( process_cxy , &rpc ); |
---|
[409] | 547 | } |
---|
| 548 | |
---|
| 549 | // release the lock protecting process copies |
---|
| 550 | remote_spinlock_unlock( lock_xp ); |
---|
| 551 | |
---|
[436] | 552 | // restore IRQs |
---|
| 553 | hal_restore_irq( save_sr); |
---|
[409] | 554 | |
---|
[440] | 555 | // client thread deschedule : will be unblocked by the last RPC server thread |
---|
[436] | 556 | sched_yield("blocked on rpc_process_sigaction"); |
---|
[409] | 557 | |
---|
[438] | 558 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 559 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 560 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 561 | printk("\n[DBG] %s : thread %x exit after %s process %x in cluster %x / cycle %d\n", |
---|
[436] | 562 | __FUNCTION__ , client, process_action_str( action_type ) , pid , local_cxy , cycle ); |
---|
[433] | 563 | #endif |
---|
[416] | 564 | |
---|
[409] | 565 | } // end process_sigaction() |
---|
| 566 | |
---|
[433] | 567 | ///////////////////////////////////////////////// |
---|
[440] | 568 | void process_block_threads( process_t * process, |
---|
| 569 | xptr_t client_xp ) |
---|
[1] | 570 | { |
---|
[409] | 571 | thread_t * target; // pointer on target thread |
---|
[433] | 572 | thread_t * this; // pointer on calling thread |
---|
[409] | 573 | uint32_t ltid; // index in process th_tbl |
---|
[436] | 574 | cxy_t owner_cxy; // target process owner cluster |
---|
[409] | 575 | uint32_t count; // requests counter |
---|
[436] | 576 | volatile uint32_t ack_count; // scheduler acknowledge counter |
---|
[1] | 577 | |
---|
[416] | 578 | // get calling thread pointer |
---|
[433] | 579 | this = CURRENT_THREAD; |
---|
[407] | 580 | |
---|
[436] | 581 | // get target process owner cluster |
---|
| 582 | owner_cxy = CXY_FROM_PID( process->pid ); |
---|
| 583 | |
---|
[438] | 584 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 585 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 586 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 587 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
| 588 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
| 589 | #endif |
---|
[409] | 590 | |
---|
| 591 | // get lock protecting process th_tbl[] |
---|
[1] | 592 | spinlock_lock( &process->th_lock ); |
---|
| 593 | |
---|
[440] | 594 | // loop on target process local threads |
---|
[409] | 595 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
[436] | 596 | for( ltid = 0 , count = 0 , ack_count = 0 ; count < process->th_nr ; ltid++ ) |
---|
[1] | 597 | { |
---|
[409] | 598 | target = process->th_tbl[ltid]; |
---|
[1] | 599 | |
---|
[436] | 600 | if( target != NULL ) // thread exist |
---|
[1] | 601 | { |
---|
| 602 | count++; |
---|
[409] | 603 | |
---|
[440] | 604 | // main thread and client thread should not be blocked |
---|
| 605 | if( ((ltid != 0) || (owner_cxy != local_cxy)) && // not main thread |
---|
| 606 | (client_xp) != XPTR( local_cxy , target ) ) // not client thread |
---|
[416] | 607 | { |
---|
| 608 | // set the global blocked bit in target thread descriptor. |
---|
[436] | 609 | thread_block( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL ); |
---|
| 610 | |
---|
| 611 | // - if the calling thread and the target thread are on the same core, |
---|
| 612 | // we don't need confirmation from scheduler, |
---|
| 613 | // - if the calling thread and the target thread are not running on the same |
---|
| 614 | // core, we ask the target scheduler to acknowlege the blocking |
---|
| 615 | // to be sure that the target thread is not running. |
---|
| 616 | |
---|
| 617 | if( this->core->lid != target->core->lid ) |
---|
| 618 | { |
---|
| 619 | // increment responses counter |
---|
| 620 | hal_atomic_add( (void*)&ack_count , 1 ); |
---|
[409] | 621 | |
---|
[436] | 622 | // set FLAG_REQ_ACK and &ack_rsp_count in target descriptor |
---|
| 623 | thread_set_req_ack( target , (uint32_t *)&ack_count ); |
---|
[409] | 624 | |
---|
[436] | 625 | // force scheduling on target thread |
---|
| 626 | dev_pic_send_ipi( local_cxy , target->core->lid ); |
---|
| 627 | } |
---|
[409] | 628 | } |
---|
[1] | 629 | } |
---|
[172] | 630 | } |
---|
| 631 | |
---|
[428] | 632 | // release lock protecting process th_tbl[] |
---|
[416] | 633 | spinlock_unlock( &process->th_lock ); |
---|
| 634 | |
---|
[436] | 635 | // wait acknowledges |
---|
[409] | 636 | while( 1 ) |
---|
| 637 | { |
---|
[436] | 638 | // exit when all scheduler acknoledges received |
---|
| 639 | if ( ack_count == 0 ) break; |
---|
[409] | 640 | |
---|
| 641 | // wait 1000 cycles before retry |
---|
| 642 | hal_fixed_delay( 1000 ); |
---|
| 643 | } |
---|
[1] | 644 | |
---|
[438] | 645 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 646 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 647 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 648 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
| 649 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
| 650 | #endif |
---|
[409] | 651 | |
---|
[428] | 652 | } // end process_block_threads() |
---|
[409] | 653 | |
---|
[440] | 654 | ///////////////////////////////////////////////// |
---|
| 655 | void process_delete_threads( process_t * process, |
---|
| 656 | xptr_t client_xp ) |
---|
[409] | 657 | { |
---|
[433] | 658 | thread_t * this; // pointer on calling thread |
---|
[440] | 659 | thread_t * target; // local pointer on target thread |
---|
| 660 | xptr_t target_xp; // extended pointer on target thread |
---|
| 661 | cxy_t owner_cxy; // owner process cluster |
---|
[409] | 662 | uint32_t ltid; // index in process th_tbl |
---|
[440] | 663 | uint32_t count; // threads counter |
---|
[409] | 664 | |
---|
[433] | 665 | // get calling thread pointer |
---|
| 666 | this = CURRENT_THREAD; |
---|
[409] | 667 | |
---|
[440] | 668 | // get target process owner cluster |
---|
| 669 | owner_cxy = CXY_FROM_PID( process->pid ); |
---|
| 670 | |
---|
[438] | 671 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 672 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 673 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 674 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
| 675 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
| 676 | #endif |
---|
| 677 | |
---|
[409] | 678 | // get lock protecting process th_tbl[] |
---|
| 679 | spinlock_lock( &process->th_lock ); |
---|
| 680 | |
---|
[440] | 681 | // loop on target process local threads |
---|
[416] | 682 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
[440] | 683 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
[1] | 684 | { |
---|
[409] | 685 | target = process->th_tbl[ltid]; |
---|
[1] | 686 | |
---|
[440] | 687 | if( target != NULL ) // valid thread |
---|
[1] | 688 | { |
---|
[416] | 689 | count++; |
---|
[440] | 690 | target_xp = XPTR( local_cxy , target ); |
---|
[1] | 691 | |
---|
[440] | 692 | // main thread and client thread should not be blocked |
---|
| 693 | if( ((ltid != 0) || (owner_cxy != local_cxy)) && // not main thread |
---|
| 694 | (client_xp) != target_xp ) // not client thread |
---|
| 695 | { |
---|
| 696 | // mark target thread for delete and block it |
---|
| 697 | thread_delete( target_xp , process->pid , false ); // not forced |
---|
| 698 | } |
---|
[409] | 699 | } |
---|
| 700 | } |
---|
[1] | 701 | |
---|
[428] | 702 | // release lock protecting process th_tbl[] |
---|
[416] | 703 | spinlock_unlock( &process->th_lock ); |
---|
[407] | 704 | |
---|
[438] | 705 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 706 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 707 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 708 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
| 709 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
| 710 | #endif |
---|
[407] | 711 | |
---|
[440] | 712 | } // end process_delete_threads() |
---|
[409] | 713 | |
---|
[440] | 714 | /////////////////////////////////////////////////// |
---|
| 715 | void process_unblock_threads( process_t * process ) |
---|
[409] | 716 | { |
---|
[440] | 717 | thread_t * target; // pointer on target thead |
---|
| 718 | thread_t * this; // pointer on calling thread |
---|
[409] | 719 | uint32_t ltid; // index in process th_tbl |
---|
[440] | 720 | uint32_t count; // requests counter |
---|
[409] | 721 | |
---|
[440] | 722 | // get calling thread pointer |
---|
| 723 | this = CURRENT_THREAD; |
---|
| 724 | |
---|
[438] | 725 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 726 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 727 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 728 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
[440] | 729 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
[433] | 730 | #endif |
---|
| 731 | |
---|
[416] | 732 | // get lock protecting process th_tbl[] |
---|
| 733 | spinlock_lock( &process->th_lock ); |
---|
| 734 | |
---|
[440] | 735 | // loop on process threads to unblock all threads |
---|
[416] | 736 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
[440] | 737 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
[409] | 738 | { |
---|
[416] | 739 | target = process->th_tbl[ltid]; |
---|
[409] | 740 | |
---|
[440] | 741 | if( target != NULL ) // thread found |
---|
[409] | 742 | { |
---|
| 743 | count++; |
---|
[440] | 744 | |
---|
| 745 | // reset the global blocked bit in target thread descriptor. |
---|
| 746 | thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL ); |
---|
[1] | 747 | } |
---|
| 748 | } |
---|
| 749 | |
---|
[428] | 750 | // release lock protecting process th_tbl[] |
---|
[416] | 751 | spinlock_unlock( &process->th_lock ); |
---|
[407] | 752 | |
---|
[438] | 753 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 754 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 755 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 756 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
[440] | 757 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
[433] | 758 | #endif |
---|
[1] | 759 | |
---|
[440] | 760 | } // end process_unblock_threads() |
---|
[407] | 761 | |
---|
[1] | 762 | /////////////////////////////////////////////// |
---|
| 763 | process_t * process_get_local_copy( pid_t pid ) |
---|
| 764 | { |
---|
| 765 | error_t error; |
---|
[172] | 766 | process_t * process_ptr; // local pointer on process |
---|
[23] | 767 | xptr_t process_xp; // extended pointer on process |
---|
[1] | 768 | |
---|
| 769 | cluster_t * cluster = LOCAL_CLUSTER; |
---|
| 770 | |
---|
| 771 | // get lock protecting local list of processes |
---|
[23] | 772 | remote_spinlock_lock( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
---|
[1] | 773 | |
---|
| 774 | // scan the local list of process descriptors to find the process |
---|
[23] | 775 | xptr_t iter; |
---|
| 776 | bool_t found = false; |
---|
| 777 | XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter ) |
---|
[1] | 778 | { |
---|
[23] | 779 | process_xp = XLIST_ELEMENT( iter , process_t , local_list ); |
---|
[435] | 780 | process_ptr = GET_PTR( process_xp ); |
---|
[23] | 781 | if( process_ptr->pid == pid ) |
---|
[1] | 782 | { |
---|
| 783 | found = true; |
---|
| 784 | break; |
---|
| 785 | } |
---|
| 786 | } |
---|
| 787 | |
---|
| 788 | // release lock protecting local list of processes |
---|
[23] | 789 | remote_spinlock_unlock( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
---|
[1] | 790 | |
---|
[172] | 791 | // allocate memory for a new local process descriptor |
---|
[440] | 792 | // and initialise it from reference cluster if not found |
---|
[1] | 793 | if( !found ) |
---|
| 794 | { |
---|
| 795 | // get extended pointer on reference process descriptor |
---|
[23] | 796 | xptr_t ref_xp = cluster_get_reference_process_from_pid( pid ); |
---|
[1] | 797 | |
---|
[23] | 798 | assert( (ref_xp != XPTR_NULL) , __FUNCTION__ , "illegal pid\n" ); |
---|
| 799 | |
---|
[1] | 800 | // allocate memory for local process descriptor |
---|
[23] | 801 | process_ptr = process_alloc(); |
---|
| 802 | if( process_ptr == NULL ) return NULL; |
---|
[1] | 803 | |
---|
| 804 | // initialize local process descriptor copy |
---|
[23] | 805 | error = process_copy_init( process_ptr , ref_xp ); |
---|
[1] | 806 | if( error ) return NULL; |
---|
| 807 | } |
---|
| 808 | |
---|
[440] | 809 | #if DEBUG_PROCESS_GET_LOCAL_COPY |
---|
| 810 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 811 | if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle ) |
---|
| 812 | printk("\n[DBG] %s : enter in cluster %x / pid %x / process %x / cycle %d\n", |
---|
| 813 | __FUNCTION__ , local_cxy , pid , process_ptr , cycle ); |
---|
| 814 | #endif |
---|
| 815 | |
---|
[23] | 816 | return process_ptr; |
---|
[1] | 817 | |
---|
[409] | 818 | } // end process_get_local_copy() |
---|
| 819 | |
---|
[436] | 820 | //////////////////////////////////////////// |
---|
| 821 | pid_t process_get_ppid( xptr_t process_xp ) |
---|
| 822 | { |
---|
| 823 | cxy_t process_cxy; |
---|
| 824 | process_t * process_ptr; |
---|
| 825 | xptr_t parent_xp; |
---|
| 826 | cxy_t parent_cxy; |
---|
| 827 | process_t * parent_ptr; |
---|
| 828 | |
---|
| 829 | // get process cluster and local pointer |
---|
| 830 | process_cxy = GET_CXY( process_xp ); |
---|
| 831 | process_ptr = GET_PTR( process_xp ); |
---|
| 832 | |
---|
| 833 | // get pointers on parent process |
---|
| 834 | parent_xp = (xptr_t)hal_remote_lwd( XPTR( process_cxy , &process_ptr->parent_xp ) ); |
---|
| 835 | parent_cxy = GET_CXY( parent_xp ); |
---|
| 836 | parent_ptr = GET_PTR( parent_xp ); |
---|
| 837 | |
---|
| 838 | return hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
| 839 | } |
---|
| 840 | |
---|
[1] | 841 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 842 | // File descriptor array related functions |
---|
| 843 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 844 | |
---|
| 845 | /////////////////////////////////////////// |
---|
| 846 | void process_fd_init( process_t * process ) |
---|
| 847 | { |
---|
| 848 | uint32_t fd; |
---|
| 849 | |
---|
| 850 | remote_spinlock_init( XPTR( local_cxy , &process->fd_array.lock ) ); |
---|
| 851 | |
---|
[23] | 852 | process->fd_array.current = 0; |
---|
| 853 | |
---|
[1] | 854 | // initialize array |
---|
[23] | 855 | for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ ) |
---|
[1] | 856 | { |
---|
| 857 | process->fd_array.array[fd] = XPTR_NULL; |
---|
| 858 | } |
---|
| 859 | } |
---|
| 860 | |
---|
[23] | 861 | ////////////////////////////// |
---|
| 862 | bool_t process_fd_array_full() |
---|
[1] | 863 | { |
---|
[172] | 864 | // get extended pointer on reference process |
---|
[23] | 865 | xptr_t ref_xp = CURRENT_THREAD->process->ref_xp; |
---|
[1] | 866 | |
---|
[23] | 867 | // get reference process cluster and local pointer |
---|
[435] | 868 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
[23] | 869 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
[1] | 870 | |
---|
[23] | 871 | // get number of open file descriptors from reference fd_array |
---|
| 872 | uint32_t current = hal_remote_lw( XPTR( ref_cxy , &ref_ptr->fd_array.current ) ); |
---|
| 873 | |
---|
[172] | 874 | return ( current >= CONFIG_PROCESS_FILE_MAX_NR ); |
---|
[1] | 875 | } |
---|
| 876 | |
---|
| 877 | ///////////////////////////////////////////////// |
---|
[407] | 878 | error_t process_fd_register( process_t * process, |
---|
| 879 | xptr_t file_xp, |
---|
| 880 | uint32_t * fdid ) |
---|
[1] | 881 | { |
---|
| 882 | bool_t found; |
---|
[23] | 883 | uint32_t id; |
---|
| 884 | xptr_t xp; |
---|
[1] | 885 | |
---|
[23] | 886 | // get reference process cluster and local pointer |
---|
[407] | 887 | xptr_t ref_xp = process->ref_xp; |
---|
[435] | 888 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
[23] | 889 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
| 890 | |
---|
| 891 | // take lock protecting reference fd_array |
---|
| 892 | remote_spinlock_lock( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) ); |
---|
| 893 | |
---|
[1] | 894 | found = false; |
---|
| 895 | |
---|
[23] | 896 | for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ ) |
---|
[1] | 897 | { |
---|
[23] | 898 | xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) ); |
---|
| 899 | if ( xp == XPTR_NULL ) |
---|
[1] | 900 | { |
---|
| 901 | found = true; |
---|
[23] | 902 | hal_remote_swd( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) , file_xp ); |
---|
| 903 | hal_remote_atomic_add( XPTR( ref_cxy , &ref_ptr->fd_array.current ) , 1 ); |
---|
[407] | 904 | *fdid = id; |
---|
[1] | 905 | break; |
---|
| 906 | } |
---|
| 907 | } |
---|
| 908 | |
---|
[23] | 909 | // release lock protecting reference fd_array |
---|
| 910 | remote_spinlock_unlock( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) ); |
---|
[1] | 911 | |
---|
[428] | 912 | if ( !found ) return -1; |
---|
[1] | 913 | else return 0; |
---|
[172] | 914 | } |
---|
[1] | 915 | |
---|
[172] | 916 | //////////////////////////////////////////////// |
---|
[23] | 917 | xptr_t process_fd_get_xptr( process_t * process, |
---|
[407] | 918 | uint32_t fdid ) |
---|
[1] | 919 | { |
---|
[23] | 920 | xptr_t file_xp; |
---|
[1] | 921 | |
---|
[23] | 922 | // access local copy of process descriptor |
---|
[407] | 923 | file_xp = process->fd_array.array[fdid]; |
---|
[1] | 924 | |
---|
[23] | 925 | if( file_xp == XPTR_NULL ) |
---|
| 926 | { |
---|
| 927 | // get reference process cluster and local pointer |
---|
| 928 | xptr_t ref_xp = process->ref_xp; |
---|
| 929 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
[435] | 930 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
[1] | 931 | |
---|
[23] | 932 | // access reference process descriptor |
---|
[407] | 933 | file_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->fd_array.array[fdid] ) ); |
---|
[1] | 934 | |
---|
[23] | 935 | // update local fd_array if found |
---|
| 936 | if( file_xp != XPTR_NULL ) |
---|
| 937 | { |
---|
[407] | 938 | process->fd_array.array[fdid] = file_xp; |
---|
[23] | 939 | } |
---|
| 940 | } |
---|
[1] | 941 | |
---|
[23] | 942 | return file_xp; |
---|
[1] | 943 | |
---|
[407] | 944 | } // end process_fd_get_xptr() |
---|
| 945 | |
---|
[1] | 946 | /////////////////////////////////////////// |
---|
| 947 | void process_fd_remote_copy( xptr_t dst_xp, |
---|
| 948 | xptr_t src_xp ) |
---|
| 949 | { |
---|
| 950 | uint32_t fd; |
---|
| 951 | xptr_t entry; |
---|
| 952 | |
---|
| 953 | // get cluster and local pointer for src fd_array |
---|
| 954 | cxy_t src_cxy = GET_CXY( src_xp ); |
---|
[435] | 955 | fd_array_t * src_ptr = GET_PTR( src_xp ); |
---|
[1] | 956 | |
---|
| 957 | // get cluster and local pointer for dst fd_array |
---|
| 958 | cxy_t dst_cxy = GET_CXY( dst_xp ); |
---|
[435] | 959 | fd_array_t * dst_ptr = GET_PTR( dst_xp ); |
---|
[1] | 960 | |
---|
| 961 | // get the remote lock protecting the src fd_array |
---|
| 962 | remote_spinlock_lock( XPTR( src_cxy , &src_ptr->lock ) ); |
---|
| 963 | |
---|
[428] | 964 | // loop on all fd_array entries |
---|
| 965 | for( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ ) |
---|
[1] | 966 | { |
---|
| 967 | entry = (xptr_t)hal_remote_lwd( XPTR( src_cxy , &src_ptr->array[fd] ) ); |
---|
| 968 | |
---|
| 969 | if( entry != XPTR_NULL ) |
---|
| 970 | { |
---|
| 971 | // increment file descriptor ref count |
---|
| 972 | vfs_file_count_up( entry ); |
---|
| 973 | |
---|
| 974 | // copy entry in destination process fd_array |
---|
| 975 | hal_remote_swd( XPTR( dst_cxy , &dst_ptr->array[fd] ) , entry ); |
---|
| 976 | } |
---|
| 977 | } |
---|
| 978 | |
---|
| 979 | // release lock on source process fd_array |
---|
| 980 | remote_spinlock_unlock( XPTR( src_cxy , &src_ptr->lock ) ); |
---|
| 981 | |
---|
[407] | 982 | } // end process_fd_remote_copy() |
---|
| 983 | |
---|
[1] | 984 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 985 | // Thread related functions |
---|
| 986 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 987 | |
---|
| 988 | ///////////////////////////////////////////////////// |
---|
| 989 | error_t process_register_thread( process_t * process, |
---|
| 990 | thread_t * thread, |
---|
| 991 | trdid_t * trdid ) |
---|
| 992 | { |
---|
| 993 | ltid_t ltid; |
---|
[428] | 994 | bool_t found = false; |
---|
[1] | 995 | |
---|
[14] | 996 | assert( (process != NULL) , __FUNCTION__ , "process argument is NULL" ); |
---|
[1] | 997 | |
---|
[14] | 998 | assert( (thread != NULL) , __FUNCTION__ , "thread argument is NULL" ); |
---|
| 999 | |
---|
[428] | 1000 | // take lock protecting th_tbl |
---|
| 1001 | spinlock_lock( &process->th_lock ); |
---|
| 1002 | |
---|
[407] | 1003 | // search a free slot in th_tbl[] |
---|
[428] | 1004 | for( ltid = 0 ; ltid < CONFIG_THREAD_MAX_PER_CLUSTER ; ltid++ ) |
---|
[1] | 1005 | { |
---|
| 1006 | if( process->th_tbl[ltid] == NULL ) |
---|
| 1007 | { |
---|
| 1008 | found = true; |
---|
| 1009 | break; |
---|
| 1010 | } |
---|
| 1011 | } |
---|
| 1012 | |
---|
| 1013 | if( found ) |
---|
| 1014 | { |
---|
| 1015 | // register thread in th_tbl[] |
---|
| 1016 | process->th_tbl[ltid] = thread; |
---|
| 1017 | process->th_nr++; |
---|
| 1018 | |
---|
| 1019 | // returns trdid |
---|
| 1020 | *trdid = TRDID( local_cxy , ltid ); |
---|
| 1021 | } |
---|
| 1022 | |
---|
[428] | 1023 | |
---|
| 1024 | // release lock protecting th_tbl |
---|
| 1025 | hal_fence(); |
---|
| 1026 | spinlock_unlock( &process->th_lock ); |
---|
| 1027 | |
---|
[1] | 1028 | return (found) ? 0 : ENOMEM; |
---|
[204] | 1029 | |
---|
| 1030 | } // end process_register_thread() |
---|
| 1031 | |
---|
[1] | 1032 | /////////////////////////////////////////////// |
---|
| 1033 | void process_remove_thread( thread_t * thread ) |
---|
| 1034 | { |
---|
[373] | 1035 | assert( (thread != NULL) , __FUNCTION__ , "thread argument is NULL" ); |
---|
[172] | 1036 | |
---|
[1] | 1037 | process_t * process = thread->process; |
---|
| 1038 | |
---|
| 1039 | // get thread local index |
---|
| 1040 | ltid_t ltid = LTID_FROM_TRDID( thread->trdid ); |
---|
| 1041 | |
---|
[428] | 1042 | // take lock protecting th_tbl |
---|
| 1043 | spinlock_lock( &process->th_lock ); |
---|
| 1044 | |
---|
| 1045 | assert( (process->th_nr) , __FUNCTION__ , "process th_nr cannot be 0\n" ); |
---|
| 1046 | |
---|
[1] | 1047 | // remove thread from th_tbl[] |
---|
| 1048 | process->th_tbl[ltid] = NULL; |
---|
| 1049 | process->th_nr--; |
---|
| 1050 | |
---|
[428] | 1051 | hal_fence(); |
---|
| 1052 | |
---|
| 1053 | // release lock protecting th_tbl |
---|
| 1054 | spinlock_unlock( &process->th_lock ); |
---|
| 1055 | |
---|
[204] | 1056 | } // process_remove_thread() |
---|
| 1057 | |
---|
[408] | 1058 | ///////////////////////////////////////////////////////// |
---|
| 1059 | error_t process_make_fork( xptr_t parent_process_xp, |
---|
| 1060 | xptr_t parent_thread_xp, |
---|
| 1061 | pid_t * child_pid, |
---|
| 1062 | thread_t ** child_thread ) |
---|
[1] | 1063 | { |
---|
[408] | 1064 | process_t * process; // local pointer on child process descriptor |
---|
| 1065 | thread_t * thread; // local pointer on child thread descriptor |
---|
| 1066 | pid_t new_pid; // process identifier for child process |
---|
| 1067 | pid_t parent_pid; // process identifier for parent process |
---|
| 1068 | xptr_t ref_xp; // extended pointer on reference process |
---|
[428] | 1069 | xptr_t vfs_bin_xp; // extended pointer on .elf file |
---|
[408] | 1070 | error_t error; |
---|
[1] | 1071 | |
---|
[408] | 1072 | // get cluster and local pointer for parent process |
---|
| 1073 | cxy_t parent_process_cxy = GET_CXY( parent_process_xp ); |
---|
[435] | 1074 | process_t * parent_process_ptr = GET_PTR( parent_process_xp ); |
---|
[101] | 1075 | |
---|
[428] | 1076 | // get parent process PID and extended pointer on .elf file |
---|
| 1077 | parent_pid = hal_remote_lw (XPTR( parent_process_cxy , &parent_process_ptr->pid)); |
---|
| 1078 | vfs_bin_xp = hal_remote_lwd(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp)); |
---|
| 1079 | |
---|
[438] | 1080 | // check parent process is the reference process |
---|
[408] | 1081 | ref_xp = hal_remote_lwd( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) ); |
---|
[438] | 1082 | |
---|
[408] | 1083 | assert( (parent_process_xp == ref_xp ) , __FUNCTION__ , |
---|
| 1084 | "parent process must be the reference process\n" ); |
---|
[407] | 1085 | |
---|
[438] | 1086 | #if DEBUG_PROCESS_MAKE_FORK |
---|
[433] | 1087 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1088 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
| 1089 | printk("\n[DBG] %s : thread %x enter for process %x / cluster %x / cycle %d\n", |
---|
| 1090 | __FUNCTION__, CURRENT_THREAD, parent_pid, local_cxy, cycle ); |
---|
[433] | 1091 | #endif |
---|
[172] | 1092 | |
---|
[408] | 1093 | // allocate a process descriptor |
---|
| 1094 | process = process_alloc(); |
---|
| 1095 | if( process == NULL ) |
---|
| 1096 | { |
---|
| 1097 | printk("\n[ERROR] in %s : cannot get process in cluster %x\n", |
---|
| 1098 | __FUNCTION__, local_cxy ); |
---|
| 1099 | return -1; |
---|
| 1100 | } |
---|
[1] | 1101 | |
---|
[408] | 1102 | // allocate a child PID from local cluster |
---|
[416] | 1103 | error = cluster_pid_alloc( process , &new_pid ); |
---|
[428] | 1104 | if( error ) |
---|
[1] | 1105 | { |
---|
[408] | 1106 | printk("\n[ERROR] in %s : cannot get PID in cluster %x\n", |
---|
| 1107 | __FUNCTION__, local_cxy ); |
---|
| 1108 | process_free( process ); |
---|
| 1109 | return -1; |
---|
[1] | 1110 | } |
---|
[408] | 1111 | |
---|
| 1112 | // initializes child process descriptor from parent process descriptor |
---|
| 1113 | process_reference_init( process, |
---|
| 1114 | new_pid, |
---|
[428] | 1115 | parent_process_xp, |
---|
[408] | 1116 | parent_process_xp ); |
---|
| 1117 | |
---|
[438] | 1118 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
[433] | 1119 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1120 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[433] | 1121 | printk("\n[DBG] %s : thread %x created child_process %x / child_pid %x / cycle %d\n", |
---|
| 1122 | __FUNCTION__, CURRENT_THREAD, process, new_pid, cycle ); |
---|
| 1123 | #endif |
---|
[408] | 1124 | |
---|
| 1125 | // copy VMM from parent descriptor to child descriptor |
---|
| 1126 | error = vmm_fork_copy( process, |
---|
| 1127 | parent_process_xp ); |
---|
| 1128 | if( error ) |
---|
[101] | 1129 | { |
---|
[408] | 1130 | printk("\n[ERROR] in %s : cannot copy VMM in cluster %x\n", |
---|
| 1131 | __FUNCTION__, local_cxy ); |
---|
| 1132 | process_free( process ); |
---|
| 1133 | cluster_pid_release( new_pid ); |
---|
| 1134 | return -1; |
---|
[101] | 1135 | } |
---|
[172] | 1136 | |
---|
[438] | 1137 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
[433] | 1138 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1139 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[433] | 1140 | printk("\n[DBG] %s : thread %x copied VMM from parent %x to child %x / cycle %d\n", |
---|
| 1141 | __FUNCTION__ , CURRENT_THREAD , parent_pid, new_pid, cycle ); |
---|
| 1142 | #endif |
---|
[407] | 1143 | |
---|
[428] | 1144 | // update extended pointer on .elf file |
---|
| 1145 | process->vfs_bin_xp = vfs_bin_xp; |
---|
| 1146 | |
---|
[408] | 1147 | // create child thread descriptor from parent thread descriptor |
---|
| 1148 | error = thread_user_fork( parent_thread_xp, |
---|
| 1149 | process, |
---|
| 1150 | &thread ); |
---|
| 1151 | if( error ) |
---|
| 1152 | { |
---|
| 1153 | printk("\n[ERROR] in %s : cannot create thread in cluster %x\n", |
---|
| 1154 | __FUNCTION__, local_cxy ); |
---|
| 1155 | process_free( process ); |
---|
| 1156 | cluster_pid_release( new_pid ); |
---|
| 1157 | return -1; |
---|
| 1158 | } |
---|
[172] | 1159 | |
---|
[438] | 1160 | // check main thread LTID |
---|
| 1161 | assert( (LTID_FROM_TRDID(thread->trdid) == 0) , __FUNCTION__ , |
---|
| 1162 | "main thread must have LTID == 0\n" ); |
---|
[428] | 1163 | |
---|
[438] | 1164 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
[433] | 1165 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1166 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[433] | 1167 | printk("\n[DBG] %s : thread %x created child thread %x / cycle %d\n", |
---|
| 1168 | __FUNCTION__ , CURRENT_THREAD, thread, cycle ); |
---|
| 1169 | #endif |
---|
[1] | 1170 | |
---|
[433] | 1171 | // set Copy_On_Write flag in parent process GPT |
---|
[408] | 1172 | // this includes all replicated GPT copies |
---|
| 1173 | if( parent_process_cxy == local_cxy ) // reference is local |
---|
| 1174 | { |
---|
| 1175 | vmm_set_cow( parent_process_ptr ); |
---|
| 1176 | } |
---|
| 1177 | else // reference is remote |
---|
| 1178 | { |
---|
| 1179 | rpc_vmm_set_cow_client( parent_process_cxy, |
---|
| 1180 | parent_process_ptr ); |
---|
| 1181 | } |
---|
[1] | 1182 | |
---|
[433] | 1183 | // set Copy_On_Write flag in child process GPT |
---|
| 1184 | vmm_set_cow( process ); |
---|
| 1185 | |
---|
[438] | 1186 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
[433] | 1187 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1188 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[433] | 1189 | printk("\n[DBG] %s : thread %x set COW in parent and child / cycle %d\n", |
---|
| 1190 | __FUNCTION__ , CURRENT_THREAD, cycle ); |
---|
| 1191 | #endif |
---|
[101] | 1192 | |
---|
[428] | 1193 | // get extended pointers on parent children_root, children_lock and children_nr |
---|
| 1194 | xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root ); |
---|
| 1195 | xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock ); |
---|
| 1196 | xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr ); |
---|
[101] | 1197 | |
---|
[428] | 1198 | // register process in parent children list |
---|
| 1199 | remote_spinlock_lock( children_lock_xp ); |
---|
| 1200 | xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) ); |
---|
| 1201 | hal_remote_atomic_add( children_nr_xp , 1 ); |
---|
| 1202 | remote_spinlock_unlock( children_lock_xp ); |
---|
[204] | 1203 | |
---|
[408] | 1204 | // return success |
---|
| 1205 | *child_thread = thread; |
---|
| 1206 | *child_pid = new_pid; |
---|
[1] | 1207 | |
---|
[438] | 1208 | #if DEBUG_PROCESS_MAKE_FORK |
---|
[433] | 1209 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1210 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[433] | 1211 | printk("\n[DBG] %s : thread %x exit / cycle %d\n", |
---|
| 1212 | __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
| 1213 | #endif |
---|
[428] | 1214 | |
---|
[408] | 1215 | return 0; |
---|
| 1216 | |
---|
[416] | 1217 | } // end process_make_fork() |
---|
[408] | 1218 | |
---|
[409] | 1219 | |
---|
[408] | 1220 | ///////////////////////////////////////////////////// |
---|
| 1221 | error_t process_make_exec( exec_info_t * exec_info ) |
---|
| 1222 | { |
---|
| 1223 | char * path; // pathname to .elf file |
---|
[433] | 1224 | pid_t pid; // old_process PID / given to new_process |
---|
| 1225 | pid_t temp_pid; // temporary PID / given to old_process |
---|
[416] | 1226 | process_t * old_process; // local pointer on old process |
---|
[433] | 1227 | thread_t * old_thread; // local pointer on old thread |
---|
[416] | 1228 | process_t * new_process; // local pointer on new process |
---|
[433] | 1229 | thread_t * new_thread; // local pointer on new thread |
---|
| 1230 | xptr_t parent_xp; // extended pointer on parent process |
---|
| 1231 | pthread_attr_t attr; // new thread attributes |
---|
[408] | 1232 | lid_t lid; // selected core local index |
---|
| 1233 | error_t error; |
---|
| 1234 | |
---|
[433] | 1235 | // get old_thread / old_process / PID / parent_xp |
---|
| 1236 | old_thread = CURRENT_THREAD; |
---|
| 1237 | old_process = old_thread->process; |
---|
| 1238 | pid = old_process->pid; |
---|
| 1239 | parent_xp = old_process->parent_xp; |
---|
| 1240 | |
---|
| 1241 | // get .elf pathname from exec_info |
---|
[416] | 1242 | path = exec_info->path; |
---|
[408] | 1243 | |
---|
[416] | 1244 | // this function must be executed by a thread running in owner cluster |
---|
[428] | 1245 | assert( (CXY_FROM_PID( pid ) == local_cxy), __FUNCTION__, |
---|
[433] | 1246 | "local_cluster must be owner_cluster\n" ); |
---|
[408] | 1247 | |
---|
[433] | 1248 | assert( (LTID_FROM_TRDID( old_thread->trdid ) == 0) , __FUNCTION__, |
---|
| 1249 | "must be called by the main thread\n" ); |
---|
| 1250 | |
---|
[438] | 1251 | #if DEBUG_PROCESS_MAKE_EXEC |
---|
[433] | 1252 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1253 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
[433] | 1254 | printk("\n[DBG] %s : thread %x enters for process %x / %s / cycle %d\n", |
---|
| 1255 | __FUNCTION__, old_thread, pid, path, cycle ); |
---|
| 1256 | #endif |
---|
[408] | 1257 | |
---|
[428] | 1258 | // allocate memory for new_process descriptor |
---|
[416] | 1259 | new_process = process_alloc(); |
---|
[408] | 1260 | |
---|
[416] | 1261 | if( new_process == NULL ) |
---|
| 1262 | { |
---|
[428] | 1263 | printk("\n[ERROR] in %s : cannot allocate process descriptor in cluster %x\n", |
---|
| 1264 | __FUNCTION__ , local_cxy ); |
---|
[416] | 1265 | return -1; |
---|
| 1266 | } |
---|
| 1267 | |
---|
[433] | 1268 | // get a temporary PID for old_process |
---|
[428] | 1269 | error = cluster_pid_alloc( old_process , &temp_pid ); |
---|
| 1270 | if( error ) |
---|
[416] | 1271 | { |
---|
[428] | 1272 | printk("\n[ERROR] in %s : cannot get PID in cluster %x\n", |
---|
| 1273 | __FUNCTION__ , local_cxy ); |
---|
| 1274 | process_free( new_process ); |
---|
[416] | 1275 | return -1; |
---|
| 1276 | } |
---|
| 1277 | |
---|
[433] | 1278 | // set temporary PID to old_process |
---|
[428] | 1279 | old_process->pid = temp_pid; |
---|
| 1280 | |
---|
[408] | 1281 | // initialize new process descriptor |
---|
[416] | 1282 | process_reference_init( new_process, |
---|
[428] | 1283 | pid, |
---|
[433] | 1284 | parent_xp, // parent_process_xp |
---|
| 1285 | XPTR(local_cxy , old_process) ); // model_process |
---|
[408] | 1286 | |
---|
[428] | 1287 | // give TXT ownership to new_process |
---|
[436] | 1288 | process_txt_set_ownership( XPTR( local_cxy , new_process) ); |
---|
[408] | 1289 | |
---|
[438] | 1290 | #if( DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
[433] | 1291 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1292 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
[433] | 1293 | printk("\n[DBG] %s : thread %x created new process %x / cycle %d \n", |
---|
| 1294 | __FUNCTION__ , old_thread , new_process , cycle ); |
---|
| 1295 | #endif |
---|
[428] | 1296 | |
---|
| 1297 | // register code & data vsegs as well as entry-point in new process VMM, |
---|
| 1298 | // and register extended pointer on .elf file in process descriptor |
---|
[416] | 1299 | if( elf_load_process( path , new_process ) ) |
---|
[1] | 1300 | { |
---|
[428] | 1301 | printk("\n[ERROR] in %s : failed to access .elf file for path %s\n", |
---|
| 1302 | __FUNCTION__ , path ); |
---|
[416] | 1303 | process_destroy( new_process ); |
---|
[408] | 1304 | return -1; |
---|
[1] | 1305 | } |
---|
| 1306 | |
---|
[438] | 1307 | #if( DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
[433] | 1308 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1309 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
[433] | 1310 | printk("\n[DBG] %s : thread %x registered code/data vsegs in new process %x / cycle %d\n", |
---|
| 1311 | __FUNCTION__, old_thread , new_process->pid , cycle ); |
---|
| 1312 | #endif |
---|
[1] | 1313 | |
---|
[408] | 1314 | // select a core in local cluster to execute the main thread |
---|
[1] | 1315 | lid = cluster_select_local_core(); |
---|
| 1316 | |
---|
| 1317 | // initialize pthread attributes for main thread |
---|
[23] | 1318 | attr.attributes = PT_ATTR_DETACH | PT_ATTR_CLUSTER_DEFINED | PT_ATTR_CORE_DEFINED; |
---|
| 1319 | attr.cxy = local_cxy; |
---|
| 1320 | attr.lid = lid; |
---|
[1] | 1321 | |
---|
[428] | 1322 | // create and initialize main thread in local cluster |
---|
| 1323 | error = thread_user_create( pid, |
---|
[416] | 1324 | (void *)new_process->vmm.entry_point, |
---|
[23] | 1325 | exec_info->args_pointers, |
---|
[1] | 1326 | &attr, |
---|
[416] | 1327 | &new_thread ); |
---|
[1] | 1328 | if( error ) |
---|
| 1329 | { |
---|
[428] | 1330 | printk("\n[ERROR] in %s : cannot create thread for process %x\n", |
---|
| 1331 | __FUNCTION__ , new_process ); |
---|
[416] | 1332 | process_destroy( new_process ); |
---|
[408] | 1333 | return -1; |
---|
[1] | 1334 | } |
---|
| 1335 | |
---|
[438] | 1336 | // check main thread LTID |
---|
| 1337 | assert( (LTID_FROM_TRDID(new_thread->trdid) == 0) , __FUNCTION__ , |
---|
| 1338 | "main thread must have LTID == 0\n" ); |
---|
[204] | 1339 | |
---|
[438] | 1340 | #if( DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
[433] | 1341 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1342 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
[433] | 1343 | printk("\n[DBG] %s : thread %x created new_process main thread %x / cycle %d\n", |
---|
| 1344 | __FUNCTION__ , old_thread , new_thread , cycle ); |
---|
| 1345 | #endif |
---|
[101] | 1346 | |
---|
[433] | 1347 | // get cluster and local pointer on parent process |
---|
[428] | 1348 | process_t * parent_ptr = GET_PTR( parent_xp ); |
---|
| 1349 | cxy_t parent_cxy = GET_CXY( parent_xp ); |
---|
[408] | 1350 | |
---|
[428] | 1351 | // get extended pointers on parent children_root, children_lock and children_nr |
---|
| 1352 | xptr_t root_xp = XPTR( parent_cxy , &parent_ptr->children_root ); |
---|
| 1353 | xptr_t lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock ); |
---|
| 1354 | xptr_t nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr ); |
---|
[416] | 1355 | |
---|
[428] | 1356 | // register new_process in parent children list |
---|
| 1357 | remote_spinlock_lock( lock_xp ); |
---|
| 1358 | xlist_add_last( root_xp , XPTR( local_cxy , &new_process->children_list ) ); |
---|
| 1359 | hal_remote_atomic_add( nr_xp , 1 ); |
---|
| 1360 | remote_spinlock_unlock( lock_xp ); |
---|
[416] | 1361 | |
---|
[172] | 1362 | // activate new thread |
---|
[416] | 1363 | thread_unblock( XPTR( local_cxy , new_thread ) , THREAD_BLOCKED_GLOBAL ); |
---|
[1] | 1364 | |
---|
[436] | 1365 | // detach old_process from TXT |
---|
| 1366 | process_txt_detach( XPTR( local_cxy , old_process ) ); |
---|
| 1367 | |
---|
[433] | 1368 | // request old_thread destruction => old_process destruction |
---|
[436] | 1369 | thread_block( XPTR( local_cxy , old_thread ) , THREAD_BLOCKED_GLOBAL ); |
---|
[433] | 1370 | hal_atomic_or( &old_thread->flags , THREAD_FLAG_REQ_DELETE ); |
---|
| 1371 | |
---|
[428] | 1372 | hal_fence(); |
---|
[204] | 1373 | |
---|
[438] | 1374 | #if DEBUG_PROCESS_MAKE_EXEC |
---|
[433] | 1375 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1376 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
[433] | 1377 | printk("\n[DBG] %s : old_thread %x blocked / new_thread %x activated / cycle %d\n", |
---|
| 1378 | __FUNCTION__ , old_thread , new_thread , cycle ); |
---|
| 1379 | #endif |
---|
| 1380 | |
---|
[409] | 1381 | return 0; |
---|
| 1382 | |
---|
| 1383 | } // end process_make_exec() |
---|
| 1384 | |
---|
[428] | 1385 | /////////////////////////////////////////////// |
---|
| 1386 | void process_zero_create( process_t * process ) |
---|
| 1387 | { |
---|
| 1388 | |
---|
[438] | 1389 | #if DEBUG_PROCESS_ZERO_CREATE |
---|
[433] | 1390 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1391 | if( DEBUG_PROCESS_ZERO_CREATE < cycle ) |
---|
[433] | 1392 | printk("\n[DBG] %s : thread %x enter / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
| 1393 | #endif |
---|
[428] | 1394 | |
---|
| 1395 | // initialize PID, REF_XP, PARENT_XP, and STATE |
---|
[433] | 1396 | process->pid = 0; |
---|
| 1397 | process->ref_xp = XPTR( local_cxy , process ); |
---|
| 1398 | process->parent_xp = XPTR_NULL; |
---|
| 1399 | process->term_state = 0; |
---|
[428] | 1400 | |
---|
| 1401 | // reset th_tbl[] array as empty |
---|
| 1402 | uint32_t i; |
---|
| 1403 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
---|
| 1404 | { |
---|
| 1405 | process->th_tbl[i] = NULL; |
---|
| 1406 | } |
---|
| 1407 | process->th_nr = 0; |
---|
| 1408 | spinlock_init( &process->th_lock ); |
---|
| 1409 | |
---|
| 1410 | // reset children list as empty |
---|
| 1411 | xlist_root_init( XPTR( local_cxy , &process->children_root ) ); |
---|
| 1412 | remote_spinlock_init( XPTR( local_cxy , &process->children_lock ) ); |
---|
| 1413 | process->children_nr = 0; |
---|
| 1414 | |
---|
| 1415 | hal_fence(); |
---|
| 1416 | |
---|
[438] | 1417 | #if DEBUG_PROCESS_ZERO_CREATE |
---|
[433] | 1418 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1419 | if( DEBUG_PROCESS_ZERO_CREATE < cycle ) |
---|
[433] | 1420 | printk("\n[DBG] %s : thread %x exit / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
| 1421 | #endif |
---|
[428] | 1422 | |
---|
| 1423 | } // end process_zero_init() |
---|
| 1424 | |
---|
[1] | 1425 | ////////////////////////// |
---|
| 1426 | void process_init_create() |
---|
| 1427 | { |
---|
[428] | 1428 | process_t * process; // local pointer on process descriptor |
---|
[409] | 1429 | pid_t pid; // process_init identifier |
---|
| 1430 | thread_t * thread; // local pointer on main thread |
---|
| 1431 | pthread_attr_t attr; // main thread attributes |
---|
| 1432 | lid_t lid; // selected core local index for main thread |
---|
| 1433 | error_t error; |
---|
[1] | 1434 | |
---|
[438] | 1435 | #if DEBUG_PROCESS_INIT_CREATE |
---|
[433] | 1436 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1437 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
[433] | 1438 | printk("\n[DBG] %s : thread %x enter / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
| 1439 | #endif |
---|
[1] | 1440 | |
---|
[408] | 1441 | // allocates memory for process descriptor from local cluster |
---|
| 1442 | process = process_alloc(); |
---|
| 1443 | if( process == NULL ) |
---|
| 1444 | { |
---|
| 1445 | printk("\n[PANIC] in %s : no memory for process descriptor in cluster %x\n", |
---|
[409] | 1446 | __FUNCTION__, local_cxy ); |
---|
[408] | 1447 | } |
---|
[101] | 1448 | |
---|
[409] | 1449 | // get PID from local cluster |
---|
[416] | 1450 | error = cluster_pid_alloc( process , &pid ); |
---|
[408] | 1451 | if( error ) |
---|
| 1452 | { |
---|
| 1453 | printk("\n[PANIC] in %s : cannot allocate PID in cluster %x\n", |
---|
| 1454 | __FUNCTION__, local_cxy ); |
---|
[428] | 1455 | process_free( process ); |
---|
[408] | 1456 | } |
---|
| 1457 | |
---|
[428] | 1458 | // check allocated PID |
---|
| 1459 | assert( (pid == 1) , __FUNCTION__ , "process INIT must be first process in cluster 0\n" ); |
---|
[409] | 1460 | |
---|
| 1461 | // initialize process descriptor / parent is local process_zero |
---|
| 1462 | process_reference_init( process, |
---|
[408] | 1463 | pid, |
---|
[428] | 1464 | XPTR( local_cxy , &process_zero ), // parent |
---|
| 1465 | XPTR( local_cxy , &process_zero ) ); // model |
---|
[408] | 1466 | |
---|
[409] | 1467 | // register "code" and "data" vsegs as well as entry-point |
---|
| 1468 | // in process VMM, using information contained in the elf file. |
---|
| 1469 | if( elf_load_process( CONFIG_PROCESS_INIT_PATH , process ) ) |
---|
| 1470 | { |
---|
| 1471 | printk("\n[PANIC] in %s : cannot access .elf file / path = %s\n", |
---|
| 1472 | __FUNCTION__, CONFIG_PROCESS_INIT_PATH ); |
---|
| 1473 | process_destroy( process ); |
---|
| 1474 | } |
---|
[101] | 1475 | |
---|
[428] | 1476 | // get extended pointers on process_zero children_root, children_lock |
---|
| 1477 | xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root ); |
---|
| 1478 | xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock ); |
---|
| 1479 | |
---|
| 1480 | // register process INIT in parent local process_zero |
---|
| 1481 | remote_spinlock_lock( children_lock_xp ); |
---|
| 1482 | xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) ); |
---|
| 1483 | hal_atomic_add( &process_zero.children_nr , 1 ); |
---|
| 1484 | remote_spinlock_unlock( children_lock_xp ); |
---|
| 1485 | |
---|
[409] | 1486 | // select a core in local cluster to execute the main thread |
---|
| 1487 | lid = cluster_select_local_core(); |
---|
| 1488 | |
---|
| 1489 | // initialize pthread attributes for main thread |
---|
| 1490 | attr.attributes = PT_ATTR_DETACH | PT_ATTR_CLUSTER_DEFINED | PT_ATTR_CORE_DEFINED; |
---|
| 1491 | attr.cxy = local_cxy; |
---|
| 1492 | attr.lid = lid; |
---|
| 1493 | |
---|
| 1494 | // create and initialize thread descriptor |
---|
| 1495 | error = thread_user_create( pid, |
---|
| 1496 | (void *)process->vmm.entry_point, |
---|
| 1497 | NULL, |
---|
| 1498 | &attr, |
---|
| 1499 | &thread ); |
---|
[408] | 1500 | if( error ) |
---|
[409] | 1501 | { |
---|
| 1502 | printk("\n[PANIC] in %s : cannot create main thread / path = %s\n", |
---|
| 1503 | __FUNCTION__, CONFIG_PROCESS_INIT_PATH ); |
---|
| 1504 | process_destroy( process ); |
---|
| 1505 | } |
---|
[1] | 1506 | |
---|
[428] | 1507 | // check main thread index |
---|
| 1508 | assert( (thread->trdid == 0) , __FUNCTION__ , "main thread must have index 0\n" ); |
---|
| 1509 | |
---|
[409] | 1510 | // activate thread |
---|
| 1511 | thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL ); |
---|
| 1512 | |
---|
[124] | 1513 | hal_fence(); |
---|
[1] | 1514 | |
---|
[438] | 1515 | #if DEBUG_PROCESS_INIT_CREATE |
---|
[433] | 1516 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1517 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
[433] | 1518 | printk("\n[DBG] %s : thread %x exit / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
| 1519 | #endif |
---|
[409] | 1520 | |
---|
[204] | 1521 | } // end process_init_create() |
---|
| 1522 | |
---|
[428] | 1523 | ///////////////////////////////////////// |
---|
| 1524 | void process_display( xptr_t process_xp ) |
---|
| 1525 | { |
---|
| 1526 | process_t * process_ptr; |
---|
| 1527 | cxy_t process_cxy; |
---|
| 1528 | xptr_t parent_xp; // extended pointer on parent process |
---|
| 1529 | process_t * parent_ptr; |
---|
| 1530 | cxy_t parent_cxy; |
---|
| 1531 | |
---|
| 1532 | pid_t pid; |
---|
| 1533 | pid_t ppid; |
---|
| 1534 | uint32_t state; |
---|
| 1535 | xptr_t ref_xp; |
---|
| 1536 | uint32_t th_nr; |
---|
| 1537 | |
---|
| 1538 | xptr_t txt_file_xp; // extended pointer on TXT_RX pseudo file |
---|
| 1539 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
| 1540 | chdev_t * chdev_ptr; |
---|
| 1541 | cxy_t chdev_cxy; |
---|
| 1542 | xptr_t owner_xp; // extended pointer on TXT owner process |
---|
| 1543 | |
---|
| 1544 | xptr_t elf_file_xp; // extended pointer on .elf file |
---|
| 1545 | cxy_t elf_file_cxy; |
---|
| 1546 | vfs_file_t * elf_file_ptr; |
---|
| 1547 | vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode |
---|
| 1548 | |
---|
| 1549 | char txt_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1550 | char elf_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1551 | |
---|
| 1552 | // get cluster and local pointer on process |
---|
| 1553 | process_ptr = GET_PTR( process_xp ); |
---|
| 1554 | process_cxy = GET_CXY( process_xp ); |
---|
| 1555 | |
---|
| 1556 | // check reference process |
---|
| 1557 | ref_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->ref_xp ) ); |
---|
| 1558 | assert( (process_xp == ref_xp) , __FUNCTION__ , "process is not the reference\n"); |
---|
| 1559 | |
---|
| 1560 | // get PID and state |
---|
| 1561 | pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
[433] | 1562 | state = hal_remote_lw( XPTR( process_cxy , &process_ptr->term_state ) ); |
---|
[428] | 1563 | |
---|
| 1564 | // get PPID |
---|
| 1565 | parent_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->parent_xp ) ); |
---|
| 1566 | parent_cxy = GET_CXY( parent_xp ); |
---|
| 1567 | parent_ptr = GET_PTR( parent_xp ); |
---|
| 1568 | ppid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
| 1569 | |
---|
| 1570 | // get number of threads |
---|
| 1571 | th_nr = hal_remote_lw( XPTR( process_cxy , &process_ptr->th_nr ) ); |
---|
| 1572 | |
---|
| 1573 | // get TXT name and process owner |
---|
| 1574 | txt_file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
| 1575 | |
---|
| 1576 | assert( (txt_file_xp != XPTR_NULL) , __FUNCTION__ , |
---|
| 1577 | "process must be attached to one TXT terminal\n" ); |
---|
| 1578 | |
---|
| 1579 | chdev_xp = chdev_from_file( txt_file_xp ); |
---|
| 1580 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
| 1581 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
| 1582 | hal_remote_strcpy( XPTR( local_cxy , txt_name ) , |
---|
| 1583 | XPTR( chdev_cxy , chdev_ptr->name ) ); |
---|
| 1584 | owner_xp = (xptr_t)hal_remote_lwd( XPTR( chdev_cxy , &chdev_ptr->ext.txt.owner_xp ) ); |
---|
| 1585 | |
---|
| 1586 | // get process .elf name |
---|
| 1587 | elf_file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) ); |
---|
| 1588 | |
---|
| 1589 | elf_file_cxy = GET_CXY( elf_file_xp ); |
---|
| 1590 | elf_file_ptr = (vfs_file_t *)GET_PTR( elf_file_xp ); |
---|
| 1591 | elf_inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) ); |
---|
| 1592 | vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name ); |
---|
| 1593 | |
---|
| 1594 | // display process info |
---|
| 1595 | if( owner_xp == process_xp ) |
---|
| 1596 | { |
---|
[433] | 1597 | printk("PID %X | PPID %X | STS %X | %s (FG) | %X | %d | %s\n", |
---|
| 1598 | pid, ppid, state, txt_name, process_ptr, th_nr, elf_name ); |
---|
[428] | 1599 | } |
---|
| 1600 | else |
---|
| 1601 | { |
---|
[433] | 1602 | printk("PID %X | PPID %X | STS %X | %s (BG) | %X | %d | %s\n", |
---|
| 1603 | pid, ppid, state, txt_name, process_ptr, th_nr, elf_name ); |
---|
[428] | 1604 | } |
---|
| 1605 | } // end process_display() |
---|
| 1606 | |
---|
| 1607 | |
---|
| 1608 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
| 1609 | // Terminals related functions |
---|
| 1610 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
| 1611 | |
---|
| 1612 | //////////////////////////// |
---|
| 1613 | uint32_t process_txt_alloc() |
---|
| 1614 | { |
---|
| 1615 | uint32_t index; // TXT terminal index |
---|
| 1616 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
| 1617 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
| 1618 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
| 1619 | xptr_t root_xp; // extended pointer on owner field in chdev |
---|
| 1620 | |
---|
| 1621 | // scan the user TXT_RX chdevs (TXT0 is reserved for kernel) |
---|
| 1622 | for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ ) |
---|
| 1623 | { |
---|
| 1624 | // get pointers on TXT_RX[index] |
---|
| 1625 | chdev_xp = chdev_dir.txt_rx[index]; |
---|
| 1626 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
| 1627 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
| 1628 | |
---|
| 1629 | // get extended pointer on root of attached process |
---|
| 1630 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
| 1631 | |
---|
| 1632 | // return free TXT index if found |
---|
| 1633 | if( xlist_is_empty( root_xp ) ) return index; |
---|
| 1634 | } |
---|
| 1635 | |
---|
| 1636 | assert( false , __FUNCTION__ , "no free TXT terminal found" ); |
---|
| 1637 | |
---|
| 1638 | return -1; |
---|
| 1639 | |
---|
| 1640 | } // end process_txt_alloc() |
---|
| 1641 | |
---|
| 1642 | ///////////////////////////////////////////// |
---|
| 1643 | void process_txt_attach( process_t * process, |
---|
| 1644 | uint32_t txt_id ) |
---|
| 1645 | { |
---|
| 1646 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
| 1647 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
| 1648 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
| 1649 | xptr_t root_xp; // extended pointer on list root in chdev |
---|
| 1650 | xptr_t lock_xp; // extended pointer on list lock in chdev |
---|
| 1651 | |
---|
[438] | 1652 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[433] | 1653 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1654 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[433] | 1655 | printk("\n[DBG] %s : thread %x enter for process %x / txt_id = %d / cycle %d\n", |
---|
[436] | 1656 | __FUNCTION__, CURRENT_THREAD, process->pid, txt_id, cycle ); |
---|
[433] | 1657 | #endif |
---|
[428] | 1658 | |
---|
[436] | 1659 | // check process is in owner cluster |
---|
| 1660 | assert( (CXY_FROM_PID( process->pid ) == local_cxy) , __FUNCTION__ , |
---|
| 1661 | "process descriptor not in owner cluster" ); |
---|
[428] | 1662 | |
---|
| 1663 | // check terminal index |
---|
| 1664 | assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) , |
---|
| 1665 | __FUNCTION__ , "illegal TXT terminal index" ); |
---|
| 1666 | |
---|
| 1667 | // get pointers on TXT_RX[txt_id] chdev |
---|
| 1668 | chdev_xp = chdev_dir.txt_rx[txt_id]; |
---|
| 1669 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
| 1670 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
| 1671 | |
---|
| 1672 | // get extended pointer on root & lock of attached process list |
---|
| 1673 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
| 1674 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
| 1675 | |
---|
| 1676 | // insert process in attached process list |
---|
| 1677 | remote_spinlock_lock( lock_xp ); |
---|
| 1678 | xlist_add_last( root_xp , XPTR( local_cxy , &process->txt_list ) ); |
---|
| 1679 | remote_spinlock_unlock( lock_xp ); |
---|
| 1680 | |
---|
[438] | 1681 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[433] | 1682 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1683 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[433] | 1684 | printk("\n[DBG] %s : thread %x exit for process %x / txt_id = %d / cycle %d\n", |
---|
[436] | 1685 | __FUNCTION__, CURRENT_THREAD, process->pid, txt_id , cycle ); |
---|
[433] | 1686 | #endif |
---|
[428] | 1687 | |
---|
| 1688 | } // end process_txt_attach() |
---|
| 1689 | |
---|
[436] | 1690 | ///////////////////////////////////////////// |
---|
| 1691 | void process_txt_detach( xptr_t process_xp ) |
---|
[428] | 1692 | { |
---|
[436] | 1693 | process_t * process_ptr; // local pointer on process in owner cluster |
---|
| 1694 | cxy_t process_cxy; // process owner cluster |
---|
| 1695 | pid_t process_pid; // process identifier |
---|
| 1696 | xptr_t file_xp; // extended pointer on stdin file |
---|
[428] | 1697 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
| 1698 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
| 1699 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
| 1700 | xptr_t lock_xp; // extended pointer on list lock in chdev |
---|
| 1701 | |
---|
[436] | 1702 | // get process cluster, local pointer, and PID |
---|
| 1703 | process_cxy = GET_CXY( process_xp ); |
---|
| 1704 | process_ptr = GET_PTR( process_xp ); |
---|
| 1705 | process_pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
| 1706 | |
---|
| 1707 | // check process descriptor in owner cluster |
---|
| 1708 | assert( (CXY_FROM_PID( process_pid ) == process_cxy ) , __FUNCTION__ , |
---|
| 1709 | "process descriptor not in owner cluster" ); |
---|
| 1710 | |
---|
[438] | 1711 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[433] | 1712 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1713 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[433] | 1714 | printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n", |
---|
[436] | 1715 | __FUNCTION__, CURRENT_THREAD, process_pid, cycle ); |
---|
[433] | 1716 | #endif |
---|
[428] | 1717 | |
---|
[436] | 1718 | // release TXT ownership (does nothing if not TXT owner) |
---|
| 1719 | process_txt_transfer_ownership( process_xp ); |
---|
[428] | 1720 | |
---|
[436] | 1721 | // get extended pointer on process stdin file |
---|
| 1722 | file_xp = (xptr_t)hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
| 1723 | |
---|
| 1724 | // get pointers on TXT_RX chdev |
---|
| 1725 | chdev_xp = chdev_from_file( file_xp ); |
---|
[428] | 1726 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
| 1727 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
| 1728 | |
---|
[436] | 1729 | // get extended pointer on lock protecting attached process list |
---|
[428] | 1730 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
| 1731 | |
---|
| 1732 | // unlink process from attached process list |
---|
| 1733 | remote_spinlock_lock( lock_xp ); |
---|
[436] | 1734 | xlist_unlink( XPTR( process_cxy , &process_ptr->txt_list ) ); |
---|
[428] | 1735 | remote_spinlock_unlock( lock_xp ); |
---|
[436] | 1736 | |
---|
[438] | 1737 | #if( DEBUG_PROCESS_TXT_ATTACH & 1 ) |
---|
| 1738 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1739 | { |
---|
| 1740 | xptr_t root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
| 1741 | xptr_t iter_xp; |
---|
| 1742 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
| 1743 | { |
---|
| 1744 | xptr_t current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
| 1745 | process_t * current_ptr = GET_PTR( current_xp ); |
---|
| 1746 | |
---|
| 1747 | printk("\n[DBG] %s : attached_process %x (pid = %x)\n", |
---|
| 1748 | __FUNCTION__, current_ptr, current_ptr->pid ); |
---|
| 1749 | } |
---|
| 1750 | } |
---|
| 1751 | #endif |
---|
| 1752 | |
---|
[438] | 1753 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[433] | 1754 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1755 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1756 | printk("\n[DBG] %s : thread %x exit / process %x detached from TXT / cycle %d\n", |
---|
| 1757 | __FUNCTION__, CURRENT_THREAD, process->pid, cycle ); |
---|
[433] | 1758 | #endif |
---|
[428] | 1759 | |
---|
| 1760 | } // end process_txt_detach() |
---|
| 1761 | |
---|
| 1762 | /////////////////////////////////////////////////// |
---|
| 1763 | void process_txt_set_ownership( xptr_t process_xp ) |
---|
| 1764 | { |
---|
| 1765 | process_t * process_ptr; |
---|
| 1766 | cxy_t process_cxy; |
---|
[436] | 1767 | pid_t process_pid; |
---|
[428] | 1768 | xptr_t file_xp; |
---|
| 1769 | xptr_t txt_xp; |
---|
| 1770 | chdev_t * txt_ptr; |
---|
| 1771 | cxy_t txt_cxy; |
---|
| 1772 | |
---|
[436] | 1773 | // get pointers on process in owner cluster |
---|
[428] | 1774 | process_cxy = GET_CXY( process_xp ); |
---|
[435] | 1775 | process_ptr = GET_PTR( process_xp ); |
---|
[428] | 1776 | |
---|
[436] | 1777 | // get process PID |
---|
| 1778 | process_pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
| 1779 | |
---|
| 1780 | // check owner cluster |
---|
| 1781 | assert( (process_cxy == CXY_FROM_PID( process_pid )) , __FUNCTION__, |
---|
| 1782 | "process descriptor not in owner cluster\n" ); |
---|
| 1783 | |
---|
[438] | 1784 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[436] | 1785 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1786 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1787 | printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n", |
---|
| 1788 | __FUNCTION__, CURRENT_THREAD, process_pid, cycle ); |
---|
| 1789 | #endif |
---|
| 1790 | |
---|
[428] | 1791 | // get extended pointer on stdin pseudo file |
---|
| 1792 | file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
| 1793 | |
---|
| 1794 | // get pointers on TXT chdev |
---|
| 1795 | txt_xp = chdev_from_file( file_xp ); |
---|
| 1796 | txt_cxy = GET_CXY( txt_xp ); |
---|
[435] | 1797 | txt_ptr = GET_PTR( txt_xp ); |
---|
[428] | 1798 | |
---|
| 1799 | // set owner field in TXT chdev |
---|
| 1800 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp ); |
---|
| 1801 | |
---|
[438] | 1802 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[436] | 1803 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1804 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1805 | printk("\n[DBG] %s : thread %x exit for process %x / cycle %d\n", |
---|
| 1806 | __FUNCTION__, CURRENT_THREAD, process_pid, cycle ); |
---|
| 1807 | #endif |
---|
| 1808 | |
---|
[428] | 1809 | } // end process_txt_set ownership() |
---|
| 1810 | |
---|
[436] | 1811 | //////////////////////////////////////////////////////// |
---|
| 1812 | void process_txt_transfer_ownership( xptr_t process_xp ) |
---|
[428] | 1813 | { |
---|
[436] | 1814 | process_t * process_ptr; // local pointer on process releasing ownership |
---|
| 1815 | cxy_t process_cxy; // process cluster |
---|
| 1816 | pid_t process_pid; // process identifier |
---|
[428] | 1817 | xptr_t file_xp; // extended pointer on TXT_RX pseudo file |
---|
| 1818 | xptr_t txt_xp; // extended pointer on TXT_RX chdev |
---|
[433] | 1819 | chdev_t * txt_ptr; // local pointer on TXT_RX chdev |
---|
| 1820 | cxy_t txt_cxy; // cluster of TXT_RX chdev |
---|
| 1821 | uint32_t txt_id; // TXT_RX channel |
---|
[428] | 1822 | xptr_t owner_xp; // extended pointer on current TXT_RX owner |
---|
| 1823 | xptr_t root_xp; // extended pointer on root of attached process list |
---|
[436] | 1824 | xptr_t lock_xp; // extended pointer on lock protecting attached process list |
---|
[428] | 1825 | xptr_t iter_xp; // iterator for xlist |
---|
| 1826 | xptr_t current_xp; // extended pointer on current process |
---|
[433] | 1827 | process_t * current_ptr; // local pointer on current process |
---|
| 1828 | cxy_t current_cxy; // cluster for current process |
---|
[428] | 1829 | |
---|
[436] | 1830 | // get pointers on process in owner cluster |
---|
[428] | 1831 | process_cxy = GET_CXY( process_xp ); |
---|
[435] | 1832 | process_ptr = GET_PTR( process_xp ); |
---|
[428] | 1833 | |
---|
[436] | 1834 | // get process PID |
---|
| 1835 | process_pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
| 1836 | |
---|
| 1837 | // check owner cluster |
---|
| 1838 | assert( (process_cxy == CXY_FROM_PID( process_pid )) , __FUNCTION__, |
---|
| 1839 | "process descriptor not in owner cluster\n" ); |
---|
| 1840 | |
---|
[438] | 1841 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[436] | 1842 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1843 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1844 | printk("\n[DBG] %s : thread %x enter / process %x / pid %x / cycle %d\n", |
---|
| 1845 | __FUNCTION__, CURRENT_THREAD, process_ptr, process_pid, cycle ); |
---|
| 1846 | #endif |
---|
| 1847 | |
---|
[428] | 1848 | // get extended pointer on stdin pseudo file |
---|
| 1849 | file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
| 1850 | |
---|
| 1851 | // get pointers on TXT chdev |
---|
| 1852 | txt_xp = chdev_from_file( file_xp ); |
---|
| 1853 | txt_cxy = GET_CXY( txt_xp ); |
---|
[433] | 1854 | txt_ptr = GET_PTR( txt_xp ); |
---|
[428] | 1855 | |
---|
[433] | 1856 | // get extended pointer on TXT_RX owner and TXT channel |
---|
[428] | 1857 | owner_xp = hal_remote_lwd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) ); |
---|
[433] | 1858 | txt_id = hal_remote_lw ( XPTR( txt_cxy , &txt_ptr->channel ) ); |
---|
[428] | 1859 | |
---|
[438] | 1860 | #if( DEBUG_PROCESS_TXT_ATTACH & 1 ) |
---|
| 1861 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1862 | printk("\n[DBG] %s : file_ptr %x / txt_ptr %x / txt_id %d / owner_ptr = %x\n", |
---|
| 1863 | __FUNCTION__, GET_PTR(file_xp), txt_ptr, txt_id, GET_PTR(owner_xp) ); |
---|
| 1864 | #endif |
---|
| 1865 | |
---|
| 1866 | // transfer ownership only if process is the TXT owner |
---|
| 1867 | if( (owner_xp == process_xp) && (txt_id > 0) ) |
---|
[428] | 1868 | { |
---|
[436] | 1869 | // get extended pointers on root and lock of attached processes list |
---|
| 1870 | root_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.root ); |
---|
| 1871 | lock_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.lock ); |
---|
[428] | 1872 | |
---|
[436] | 1873 | // get lock |
---|
| 1874 | remote_spinlock_lock( lock_xp ); |
---|
| 1875 | |
---|
| 1876 | if( process_get_ppid( process_xp ) != 1 ) // process is not KSH |
---|
[428] | 1877 | { |
---|
| 1878 | |
---|
[438] | 1879 | #if( DEBUG_PROCESS_TXT_ATTACH & 1 ) |
---|
| 1880 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1881 | printk("\n[DBG] %s : process is not the KSH process => search the KSH\n", __FUNCTION__ ); |
---|
| 1882 | #endif |
---|
| 1883 | // scan attached process list to find KSH process |
---|
| 1884 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
| 1885 | { |
---|
| 1886 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
| 1887 | current_cxy = GET_CXY( current_xp ); |
---|
| 1888 | current_ptr = GET_PTR( current_xp ); |
---|
[435] | 1889 | |
---|
[436] | 1890 | if( process_get_ppid( current_xp ) == 1 ) // current is KSH |
---|
| 1891 | { |
---|
| 1892 | // release lock |
---|
| 1893 | remote_spinlock_unlock( lock_xp ); |
---|
| 1894 | |
---|
| 1895 | // set owner field in TXT chdev |
---|
| 1896 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp ); |
---|
| 1897 | |
---|
[438] | 1898 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[436] | 1899 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1900 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1901 | printk("\n[DBG] %s : thread %x exit / process %x to KSH process %x / cycle %d\n", |
---|
| 1902 | __FUNCTION__, CURRENT_THREAD, process_pid, |
---|
| 1903 | hal_remote_lw( XPTR( current_cxy , ¤t_ptr->pid ) ), cycle ); |
---|
| 1904 | #endif |
---|
| 1905 | return; |
---|
| 1906 | } |
---|
| 1907 | } |
---|
| 1908 | |
---|
| 1909 | // release lock |
---|
| 1910 | remote_spinlock_unlock( lock_xp ); |
---|
| 1911 | |
---|
| 1912 | // PANIC if KSH not found |
---|
| 1913 | assert( false , __FUNCTION__ , "KSH process not found for TXT %d" ); |
---|
| 1914 | |
---|
| 1915 | return; |
---|
| 1916 | } |
---|
| 1917 | else // process is KSH |
---|
| 1918 | { |
---|
| 1919 | |
---|
[438] | 1920 | #if( DEBUG_PROCESS_TXT_ATTACH & 1 ) |
---|
| 1921 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1922 | printk("\n[DBG] %s : process is the KSH process => search another\n", __FUNCTION__ ); |
---|
| 1923 | #endif |
---|
| 1924 | |
---|
| 1925 | // scan attached process list to find another process |
---|
| 1926 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
[428] | 1927 | { |
---|
[436] | 1928 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
| 1929 | current_cxy = GET_CXY( current_xp ); |
---|
| 1930 | current_ptr = GET_PTR( current_xp ); |
---|
| 1931 | |
---|
| 1932 | if( current_xp != process_xp ) // current is not KSH |
---|
| 1933 | { |
---|
| 1934 | // release lock |
---|
| 1935 | remote_spinlock_unlock( lock_xp ); |
---|
| 1936 | |
---|
| 1937 | // set owner field in TXT chdev |
---|
| 1938 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp ); |
---|
| 1939 | |
---|
[438] | 1940 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[436] | 1941 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1942 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1943 | printk("\n[DBG] %s : thread %x exit / KSH process %x to process %x / cycle %d\n", |
---|
| 1944 | __FUNCTION__, CURRENT_THREAD, process_pid, |
---|
| 1945 | hal_remote_lw( XPTR( current_cxy , ¤t_ptr->pid ) ), cycle ); |
---|
| 1946 | #endif |
---|
| 1947 | return; |
---|
| 1948 | } |
---|
[428] | 1949 | } |
---|
[436] | 1950 | |
---|
| 1951 | // release lock |
---|
| 1952 | remote_spinlock_unlock( lock_xp ); |
---|
| 1953 | |
---|
| 1954 | // no more owner for TXT if no other process found |
---|
| 1955 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , XPTR_NULL ); |
---|
| 1956 | |
---|
[438] | 1957 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[436] | 1958 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1959 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1960 | printk("\n[DBG] %s : thread %x exit / KSH process %x to nobody / cycle %d\n", |
---|
| 1961 | __FUNCTION__, CURRENT_THREAD, process_pid, cycle ); |
---|
| 1962 | #endif |
---|
| 1963 | return; |
---|
[428] | 1964 | } |
---|
[436] | 1965 | } |
---|
| 1966 | else |
---|
| 1967 | { |
---|
[433] | 1968 | |
---|
[438] | 1969 | #if DEBUG_PROCESS_TXT_ATTACH |
---|
[436] | 1970 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1971 | if( DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
[436] | 1972 | printk("\n[DBG] %s : thread %x exit / process %x is not TXT owner / cycle %d\n", |
---|
| 1973 | __FUNCTION__, CURRENT_THREAD, process_pid, cycle ); |
---|
| 1974 | #endif |
---|
| 1975 | |
---|
[428] | 1976 | } |
---|
[436] | 1977 | } // end process_txt_transfer_ownership() |
---|
[428] | 1978 | |
---|
| 1979 | |
---|
[436] | 1980 | //////////////////////////////////////////////// |
---|
| 1981 | xptr_t process_txt_get_owner( uint32_t channel ) |
---|
[435] | 1982 | { |
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| 1983 | xptr_t txt_rx_xp = chdev_dir.txt_rx[channel]; |
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| 1984 | cxy_t txt_rx_cxy = GET_CXY( txt_rx_xp ); |
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| 1985 | chdev_t * txt_rx_ptr = GET_PTR( txt_rx_xp ); |
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| 1986 | |
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[436] | 1987 | return (xptr_t)hal_remote_lwd( XPTR( txt_rx_cxy , &txt_rx_ptr->ext.txt.owner_xp ) ); |
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[435] | 1988 | } |
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| 1989 | |
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| 1990 | /////////////////////////////////////////// |
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| 1991 | void process_txt_display( uint32_t txt_id ) |
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| 1992 | { |
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| 1993 | xptr_t chdev_xp; |
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| 1994 | cxy_t chdev_cxy; |
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| 1995 | chdev_t * chdev_ptr; |
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| 1996 | xptr_t root_xp; |
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| 1997 | xptr_t lock_xp; |
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| 1998 | xptr_t current_xp; |
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| 1999 | xptr_t iter_xp; |
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| 2000 | |
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| 2001 | // check terminal index |
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| 2002 | assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) , |
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| 2003 | __FUNCTION__ , "illegal TXT terminal index" ); |
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| 2004 | |
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| 2005 | // get pointers on TXT_RX[txt_id] chdev |
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| 2006 | chdev_xp = chdev_dir.txt_rx[txt_id]; |
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| 2007 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 2008 | chdev_ptr = GET_PTR( chdev_xp ); |
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| 2009 | |
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| 2010 | // get extended pointer on root & lock of attached process list |
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| 2011 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
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| 2012 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
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| 2013 | |
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| 2014 | // display header |
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| 2015 | printk("\n***** processes attached to TXT_%d\n", txt_id ); |
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| 2016 | |
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| 2017 | // get lock |
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| 2018 | remote_spinlock_lock( lock_xp ); |
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| 2019 | |
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[436] | 2020 | // scan attached process list |
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[435] | 2021 | XLIST_FOREACH( root_xp , iter_xp ) |
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| 2022 | { |
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| 2023 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
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| 2024 | process_display( current_xp ); |
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| 2025 | } |
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| 2026 | |
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| 2027 | // release lock |
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| 2028 | remote_spinlock_unlock( lock_xp ); |
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| 2029 | |
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| 2030 | } // end process_txt_display |
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