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