[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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[457] | 27 | #include <hal_kernel_types.h> |
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[1] | 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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[457] | 91 | xptr_t parent_xp ) |
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[1] | 92 | { |
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[428] | 93 | cxy_t parent_cxy; |
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| 94 | process_t * parent_ptr; |
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[407] | 95 | xptr_t stdin_xp; |
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| 96 | xptr_t stdout_xp; |
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| 97 | xptr_t stderr_xp; |
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| 98 | uint32_t stdin_id; |
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| 99 | uint32_t stdout_id; |
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| 100 | uint32_t stderr_id; |
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[415] | 101 | error_t error; |
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[428] | 102 | uint32_t txt_id; |
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| 103 | char rx_path[40]; |
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| 104 | char tx_path[40]; |
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[440] | 105 | xptr_t file_xp; |
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[428] | 106 | xptr_t chdev_xp; |
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| 107 | chdev_t * chdev_ptr; |
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| 108 | cxy_t chdev_cxy; |
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| 109 | pid_t parent_pid; |
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[1] | 110 | |
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[428] | 111 | // get parent process cluster and local pointer |
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| 112 | parent_cxy = GET_CXY( parent_xp ); |
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[435] | 113 | parent_ptr = GET_PTR( parent_xp ); |
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[204] | 114 | |
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[457] | 115 | // get parent_pid |
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[428] | 116 | parent_pid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
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| 117 | |
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[438] | 118 | #if DEBUG_PROCESS_REFERENCE_INIT |
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[433] | 119 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 120 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[457] | 121 | printk("\n[DBG] %s : thread %x in process %x enter to initalialize process %x / cycle %d\n", |
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| 122 | __FUNCTION__, CURRENT_THREAD->trdid, parent_pid , pid , cycle ); |
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[433] | 123 | #endif |
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[428] | 124 | |
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| 125 | // initialize PID, REF_XP, PARENT_XP, and STATE |
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[433] | 126 | process->pid = pid; |
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| 127 | process->ref_xp = XPTR( local_cxy , process ); |
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[443] | 128 | process->owner_xp = XPTR( local_cxy , process ); |
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[433] | 129 | process->parent_xp = parent_xp; |
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| 130 | process->term_state = 0; |
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[428] | 131 | |
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[409] | 132 | // initialize vmm as empty |
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[415] | 133 | error = vmm_init( process ); |
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[492] | 134 | assert( (error == 0) , "cannot initialize VMM\n" ); |
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[415] | 135 | |
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[438] | 136 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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[433] | 137 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 138 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[457] | 139 | printk("\n[DBG] %s : thread %x in process %x / vmm empty for process %x / cycle %d\n", |
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| 140 | __FUNCTION__, CURRENT_THREAD->trdid, parent_pid , cycle ); |
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[433] | 141 | #endif |
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[1] | 142 | |
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[409] | 143 | // initialize fd_array as empty |
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[408] | 144 | process_fd_init( process ); |
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[1] | 145 | |
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[428] | 146 | // define the stdin/stdout/stderr pseudo files <=> select a TXT terminal. |
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[457] | 147 | if( (pid == 1) || (parent_pid == 1)) // INIT or KSH process |
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[408] | 148 | { |
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[457] | 149 | // allocate a TXT channel |
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| 150 | if( pid == 1 ) txt_id = 0; // INIT |
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| 151 | else txt_id = process_txt_alloc(); // KSH |
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[428] | 152 | |
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[457] | 153 | // attach process to TXT |
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[428] | 154 | process_txt_attach( process , txt_id ); |
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| 155 | |
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[457] | 156 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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| 157 | cycle = (uint32_t)hal_get_cycles(); |
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| 158 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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| 159 | printk("\n[DBG] %s : thread %x in process %x / process %x attached to TXT%d / cycle %d\n", |
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| 160 | __FUNCTION__, CURRENT_THREAD->trdid, parent_pid, pid, txt_id, cycle ); |
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| 161 | #endif |
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| 162 | |
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| 163 | |
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| 164 | |
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[428] | 165 | // build path to TXT_RX[i] and TXT_TX[i] chdevs |
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| 166 | snprintf( rx_path , 40 , "/dev/external/txt%d_rx", txt_id ); |
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| 167 | snprintf( tx_path , 40 , "/dev/external/txt%d_tx", txt_id ); |
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| 168 | |
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| 169 | // create stdin pseudo file |
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| 170 | error = vfs_open( process, |
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| 171 | rx_path, |
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[408] | 172 | O_RDONLY, |
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| 173 | 0, // FIXME chmod |
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| 174 | &stdin_xp, |
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| 175 | &stdin_id ); |
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[1] | 176 | |
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[492] | 177 | assert( (error == 0) , "cannot open stdin pseudo file" ); |
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| 178 | assert( (stdin_id == 0) , "stdin index must be 0" ); |
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[428] | 179 | |
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[440] | 180 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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| 181 | cycle = (uint32_t)hal_get_cycles(); |
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| 182 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[457] | 183 | printk("\n[DBG] %s : thread %x in process %x / stdin open for process %x / cycle %d\n", |
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| 184 | __FUNCTION__, CURRENT_THREAD->trdid, parent_pid, pid, cycle ); |
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[440] | 185 | #endif |
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| 186 | |
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[428] | 187 | // create stdout pseudo file |
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| 188 | error = vfs_open( process, |
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| 189 | tx_path, |
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[408] | 190 | O_WRONLY, |
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| 191 | 0, // FIXME chmod |
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| 192 | &stdout_xp, |
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| 193 | &stdout_id ); |
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[1] | 194 | |
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[492] | 195 | assert( (error == 0) , "cannot open stdout pseudo file" ); |
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| 196 | assert( (stdout_id == 1) , "stdout index must be 1" ); |
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[428] | 197 | |
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[440] | 198 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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| 199 | cycle = (uint32_t)hal_get_cycles(); |
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| 200 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[457] | 201 | printk("\n[DBG] %s : thread %x in process %x / stdout open for process %x / cycle %d\n", |
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| 202 | __FUNCTION__, CURRENT_THREAD->trdid, parent_pid, pid, cycle ); |
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[440] | 203 | #endif |
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| 204 | |
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[428] | 205 | // create stderr pseudo file |
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| 206 | error = vfs_open( process, |
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| 207 | tx_path, |
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[408] | 208 | O_WRONLY, |
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| 209 | 0, // FIXME chmod |
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| 210 | &stderr_xp, |
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| 211 | &stderr_id ); |
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[428] | 212 | |
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[492] | 213 | assert( (error == 0) , "cannot open stderr pseudo file" ); |
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| 214 | assert( (stderr_id == 2) , "stderr index must be 2" ); |
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[428] | 215 | |
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[440] | 216 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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| 217 | cycle = (uint32_t)hal_get_cycles(); |
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| 218 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[457] | 219 | printk("\n[DBG] %s : thread %x in process %x / stderr open for process %x / cycle %d\n", |
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| 220 | __FUNCTION__, CURRENT_THREAD->trdid, parent_pid, pid, cycle ); |
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[440] | 221 | #endif |
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| 222 | |
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[408] | 223 | } |
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[428] | 224 | else // normal user process |
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[408] | 225 | { |
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[457] | 226 | // get extended pointer on stdin pseudo file in parent process |
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| 227 | file_xp = (xptr_t)hal_remote_lwd( XPTR( parent_cxy , &parent_ptr->fd_array.array[0] ) ); |
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[440] | 228 | |
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[457] | 229 | // get extended pointer on parent process TXT chdev |
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[440] | 230 | chdev_xp = chdev_from_file( file_xp ); |
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[428] | 231 | |
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| 232 | // get cluster and local pointer on chdev |
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| 233 | chdev_cxy = GET_CXY( chdev_xp ); |
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[435] | 234 | chdev_ptr = GET_PTR( chdev_xp ); |
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[428] | 235 | |
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| 236 | // get TXT terminal index |
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| 237 | txt_id = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->channel ) ); |
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[407] | 238 | |
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[428] | 239 | // attach process to TXT[txt_id] |
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| 240 | process_txt_attach( process , txt_id ); |
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[407] | 241 | |
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[457] | 242 | // copy all open files from parent process fd_array to this process |
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[428] | 243 | process_fd_remote_copy( XPTR( local_cxy , &process->fd_array ), |
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[457] | 244 | XPTR( parent_cxy , &parent_ptr->fd_array ) ); |
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[408] | 245 | } |
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[407] | 246 | |
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[409] | 247 | // initialize specific inodes root and cwd |
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[457] | 248 | process->vfs_root_xp = (xptr_t)hal_remote_lwd( XPTR( parent_cxy, |
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| 249 | &parent_ptr->vfs_root_xp ) ); |
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| 250 | process->vfs_cwd_xp = (xptr_t)hal_remote_lwd( XPTR( parent_cxy, |
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| 251 | &parent_ptr->vfs_cwd_xp ) ); |
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[409] | 252 | vfs_inode_remote_up( process->vfs_root_xp ); |
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| 253 | vfs_inode_remote_up( process->vfs_cwd_xp ); |
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[408] | 254 | |
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[409] | 255 | remote_rwlock_init( XPTR( local_cxy , &process->cwd_lock ) ); |
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| 256 | |
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[438] | 257 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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[433] | 258 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 259 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[433] | 260 | printk("\n[DBG] %s : thread %x / fd_array for process %x / cycle %d\n", |
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| 261 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
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| 262 | #endif |
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[407] | 263 | |
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[408] | 264 | // reset children list root |
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| 265 | xlist_root_init( XPTR( local_cxy , &process->children_root ) ); |
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| 266 | process->children_nr = 0; |
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[428] | 267 | remote_spinlock_init( XPTR( local_cxy , &process->children_lock ) ); |
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[407] | 268 | |
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[408] | 269 | // reset semaphore / mutex / barrier / condvar list roots |
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| 270 | xlist_root_init( XPTR( local_cxy , &process->sem_root ) ); |
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| 271 | xlist_root_init( XPTR( local_cxy , &process->mutex_root ) ); |
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| 272 | xlist_root_init( XPTR( local_cxy , &process->barrier_root ) ); |
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| 273 | xlist_root_init( XPTR( local_cxy , &process->condvar_root ) ); |
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| 274 | remote_spinlock_init( XPTR( local_cxy , &process->sync_lock ) ); |
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[407] | 275 | |
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[408] | 276 | // register new process in the local cluster manager pref_tbl[] |
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| 277 | lpid_t lpid = LPID_FROM_PID( pid ); |
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| 278 | LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process ); |
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[407] | 279 | |
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[408] | 280 | // register new process descriptor in local cluster manager local_list |
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| 281 | cluster_process_local_link( process ); |
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[407] | 282 | |
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[408] | 283 | // register new process descriptor in local cluster manager copies_list |
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| 284 | cluster_process_copies_link( process ); |
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[172] | 285 | |
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[408] | 286 | // reset th_tbl[] array as empty in process descriptor |
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[1] | 287 | uint32_t i; |
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| 288 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
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| 289 | { |
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| 290 | process->th_tbl[i] = NULL; |
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| 291 | } |
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| 292 | process->th_nr = 0; |
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| 293 | spinlock_init( &process->th_lock ); |
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| 294 | |
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[124] | 295 | hal_fence(); |
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[1] | 296 | |
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[438] | 297 | #if (DEBUG_PROCESS_REFERENCE_INIT & 1) |
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[433] | 298 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 299 | if( DEBUG_PROCESS_REFERENCE_INIT ) |
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[433] | 300 | printk("\n[DBG] %s : thread %x exit / process %x / cycle %d\n", |
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| 301 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
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| 302 | #endif |
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[101] | 303 | |
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[428] | 304 | } // process_reference_init() |
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[204] | 305 | |
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[1] | 306 | ///////////////////////////////////////////////////// |
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| 307 | error_t process_copy_init( process_t * local_process, |
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| 308 | xptr_t reference_process_xp ) |
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| 309 | { |
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[415] | 310 | error_t error; |
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| 311 | |
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[23] | 312 | // get reference process cluster and local pointer |
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| 313 | cxy_t ref_cxy = GET_CXY( reference_process_xp ); |
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[435] | 314 | process_t * ref_ptr = GET_PTR( reference_process_xp ); |
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[1] | 315 | |
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[428] | 316 | // initialize PID, REF_XP, PARENT_XP, and STATE |
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[433] | 317 | local_process->pid = hal_remote_lw( XPTR( ref_cxy , &ref_ptr->pid ) ); |
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| 318 | local_process->parent_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->parent_xp ) ); |
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| 319 | local_process->ref_xp = reference_process_xp; |
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[443] | 320 | local_process->owner_xp = reference_process_xp; |
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[433] | 321 | local_process->term_state = 0; |
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[407] | 322 | |
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[438] | 323 | #if DEBUG_PROCESS_COPY_INIT |
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[433] | 324 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 325 | if( DEBUG_PROCESS_COPY_INIT ) |
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[433] | 326 | printk("\n[DBG] %s : thread %x enter for process %x\n", |
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| 327 | __FUNCTION__ , CURRENT_THREAD , local_process->pid ); |
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| 328 | #endif |
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[407] | 329 | |
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[172] | 330 | // reset local process vmm |
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[415] | 331 | error = vmm_init( local_process ); |
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[492] | 332 | assert( (error == 0) , "cannot initialize VMM\n"); |
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[1] | 333 | |
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[172] | 334 | // reset process file descriptors array |
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[23] | 335 | process_fd_init( local_process ); |
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[1] | 336 | |
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[23] | 337 | // reset vfs_root_xp / vfs_bin_xp / vfs_cwd_xp fields |
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| 338 | local_process->vfs_root_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) ); |
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| 339 | local_process->vfs_bin_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) ); |
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| 340 | local_process->vfs_cwd_xp = XPTR_NULL; |
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[1] | 341 | |
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| 342 | // reset children list root (not used in a process descriptor copy) |
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| 343 | xlist_root_init( XPTR( local_cxy , &local_process->children_root ) ); |
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[172] | 344 | local_process->children_nr = 0; |
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[428] | 345 | remote_spinlock_init( XPTR( local_cxy , &local_process->children_lock ) ); |
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[1] | 346 | |
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[428] | 347 | // reset children_list (not used in a process descriptor copy) |
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| 348 | xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) ); |
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[1] | 349 | |
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| 350 | // reset semaphores list root (not used in a process descriptor copy) |
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| 351 | xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) ); |
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[23] | 352 | xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) ); |
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| 353 | xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) ); |
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| 354 | xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) ); |
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[1] | 355 | |
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[23] | 356 | // reset th_tbl[] array as empty |
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[1] | 357 | uint32_t i; |
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| 358 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
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| 359 | { |
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| 360 | local_process->th_tbl[i] = NULL; |
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| 361 | } |
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| 362 | local_process->th_nr = 0; |
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| 363 | spinlock_init( &local_process->th_lock ); |
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| 364 | |
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| 365 | // register new process descriptor in local cluster manager local_list |
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| 366 | cluster_process_local_link( local_process ); |
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| 367 | |
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| 368 | // register new process descriptor in owner cluster manager copies_list |
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| 369 | cluster_process_copies_link( local_process ); |
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| 370 | |
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[124] | 371 | hal_fence(); |
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[1] | 372 | |
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[438] | 373 | #if DEBUG_PROCESS_COPY_INIT |
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[433] | 374 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 375 | if( DEBUG_PROCESS_COPY_INIT ) |
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[433] | 376 | printk("\n[DBG] %s : thread %x exit for process %x\n", |
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| 377 | __FUNCTION__ , CURRENT_THREAD , local_process->pid ); |
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| 378 | #endif |
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[279] | 379 | |
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[1] | 380 | return 0; |
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| 381 | |
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[204] | 382 | } // end process_copy_init() |
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| 383 | |
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[1] | 384 | /////////////////////////////////////////// |
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| 385 | void process_destroy( process_t * process ) |
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| 386 | { |
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[428] | 387 | xptr_t parent_xp; |
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| 388 | process_t * parent_ptr; |
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| 389 | cxy_t parent_cxy; |
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| 390 | xptr_t children_lock_xp; |
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[446] | 391 | xptr_t children_nr_xp; |
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[1] | 392 | |
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[437] | 393 | pid_t pid = process->pid; |
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| 394 | |
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[492] | 395 | assert( (process->th_nr == 0) , |
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[437] | 396 | "process %x in cluster %x has still active threads", pid , local_cxy ); |
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[428] | 397 | |
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[438] | 398 | #if DEBUG_PROCESS_DESTROY |
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[433] | 399 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 400 | if( DEBUG_PROCESS_DESTROY ) |
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[445] | 401 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
| 402 | __FUNCTION__ , CURRENT_THREAD , pid , local_cxy , cycle ); |
---|
[433] | 403 | #endif |
---|
[428] | 404 | |
---|
[436] | 405 | // remove process from local_list in local cluster manager |
---|
| 406 | cluster_process_local_unlink( process ); |
---|
[1] | 407 | |
---|
[436] | 408 | // remove process from copies_list in owner cluster manager |
---|
| 409 | cluster_process_copies_unlink( process ); |
---|
[23] | 410 | |
---|
[450] | 411 | // remove process from children_list |
---|
| 412 | // and release PID if owner cluster |
---|
[437] | 413 | if( CXY_FROM_PID( pid ) == local_cxy ) |
---|
[428] | 414 | { |
---|
| 415 | // get pointers on parent process |
---|
| 416 | parent_xp = process->parent_xp; |
---|
| 417 | parent_cxy = GET_CXY( parent_xp ); |
---|
| 418 | parent_ptr = GET_PTR( parent_xp ); |
---|
| 419 | |
---|
| 420 | // get extended pointer on children_lock in parent process |
---|
| 421 | children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock ); |
---|
[446] | 422 | children_nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr ); |
---|
[428] | 423 | |
---|
| 424 | // remove process from children_list |
---|
| 425 | remote_spinlock_lock( children_lock_xp ); |
---|
| 426 | xlist_unlink( XPTR( local_cxy , &process->children_list ) ); |
---|
[446] | 427 | hal_remote_atomic_add( children_nr_xp , -1 ); |
---|
[428] | 428 | remote_spinlock_unlock( children_lock_xp ); |
---|
[450] | 429 | |
---|
| 430 | // release the process PID to cluster manager |
---|
| 431 | cluster_pid_release( pid ); |
---|
| 432 | |
---|
[428] | 433 | } |
---|
| 434 | |
---|
[409] | 435 | // FIXME close all open files and update dirty [AG] |
---|
[23] | 436 | |
---|
[428] | 437 | // decrease refcount for bin file, root file and cwd file |
---|
[337] | 438 | if( process->vfs_bin_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_bin_xp ); |
---|
| 439 | if( process->vfs_root_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_root_xp ); |
---|
| 440 | if( process->vfs_cwd_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_cwd_xp ); |
---|
[1] | 441 | |
---|
| 442 | // Destroy VMM |
---|
| 443 | vmm_destroy( process ); |
---|
| 444 | |
---|
[416] | 445 | // release memory allocated to process descriptor |
---|
| 446 | process_free( process ); |
---|
[1] | 447 | |
---|
[438] | 448 | #if DEBUG_PROCESS_DESTROY |
---|
[433] | 449 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 450 | if( DEBUG_PROCESS_DESTROY ) |
---|
[445] | 451 | printk("\n[DBG] %s : thread %x exit / destroyed process %x in cluster %x / cycle %d\n", |
---|
| 452 | __FUNCTION__ , CURRENT_THREAD , pid, local_cxy, cycle ); |
---|
[433] | 453 | #endif |
---|
[428] | 454 | |
---|
[407] | 455 | } // end process_destroy() |
---|
| 456 | |
---|
[409] | 457 | ///////////////////////////////////////////////// |
---|
| 458 | char * process_action_str( uint32_t action_type ) |
---|
| 459 | { |
---|
| 460 | if ( action_type == BLOCK_ALL_THREADS ) return "BLOCK"; |
---|
| 461 | else if( action_type == UNBLOCK_ALL_THREADS ) return "UNBLOCK"; |
---|
| 462 | else if( action_type == DELETE_ALL_THREADS ) return "DELETE"; |
---|
| 463 | else return "undefined"; |
---|
| 464 | } |
---|
| 465 | |
---|
[435] | 466 | //////////////////////////////////////// |
---|
| 467 | void process_sigaction( pid_t pid, |
---|
[457] | 468 | uint32_t type ) |
---|
[409] | 469 | { |
---|
| 470 | cxy_t owner_cxy; // owner cluster identifier |
---|
| 471 | lpid_t lpid; // process index in owner cluster |
---|
| 472 | cluster_t * cluster; // pointer on cluster manager |
---|
| 473 | xptr_t root_xp; // extended pointer on root of copies |
---|
| 474 | xptr_t lock_xp; // extended pointer on lock protecting copies |
---|
| 475 | xptr_t iter_xp; // iterator on copies list |
---|
| 476 | xptr_t process_xp; // extended pointer on process copy |
---|
| 477 | cxy_t process_cxy; // process copy cluster identifier |
---|
[457] | 478 | process_t * process_ptr; // local pointer on process copy |
---|
[436] | 479 | reg_t save_sr; // for critical section |
---|
| 480 | rpc_desc_t rpc; // shared RPC descriptor |
---|
[457] | 481 | thread_t * client; // pointer on client thread |
---|
| 482 | xptr_t client_xp; // extended pointer on client thread |
---|
| 483 | process_t * local; // pointer on process copy in local cluster |
---|
| 484 | uint32_t remote_nr; // number of remote process copies |
---|
[409] | 485 | |
---|
[457] | 486 | client = CURRENT_THREAD; |
---|
| 487 | client_xp = XPTR( local_cxy , client ); |
---|
| 488 | local = NULL; |
---|
| 489 | remote_nr = 0; |
---|
[435] | 490 | |
---|
[438] | 491 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 492 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 493 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[457] | 494 | printk("\n[DBG] %s : thread %x in process %x enter to %s process %x / cycle %d\n", |
---|
| 495 | __FUNCTION__ , client->trdid, client->process->pid, |
---|
| 496 | process_action_str( type ) , pid , cycle ); |
---|
[433] | 497 | #endif |
---|
[409] | 498 | |
---|
[436] | 499 | // get pointer on local cluster manager |
---|
[416] | 500 | cluster = LOCAL_CLUSTER; |
---|
| 501 | |
---|
[409] | 502 | // get owner cluster identifier and process lpid |
---|
[435] | 503 | owner_cxy = CXY_FROM_PID( pid ); |
---|
| 504 | lpid = LPID_FROM_PID( pid ); |
---|
[409] | 505 | |
---|
[435] | 506 | // get root of list of copies, lock, and number of copies from owner cluster |
---|
[436] | 507 | root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] ); |
---|
| 508 | lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] ); |
---|
[435] | 509 | |
---|
[416] | 510 | // check action type |
---|
[457] | 511 | assert( ((type == DELETE_ALL_THREADS ) || |
---|
| 512 | (type == BLOCK_ALL_THREADS ) || |
---|
[492] | 513 | (type == UNBLOCK_ALL_THREADS )), "illegal action type" ); |
---|
[416] | 514 | |
---|
| 515 | |
---|
[457] | 516 | // The client thread send parallel RPCs to all remote clusters containing |
---|
| 517 | // target process copies, wait all responses, and then handles directly the |
---|
| 518 | // threads in local cluster, when required. |
---|
| 519 | // The client thread allocates a - shared - RPC descriptor in the stack, |
---|
| 520 | // because all parallel, non-blocking, server threads use the same input |
---|
| 521 | // arguments, and use the shared RPC response field |
---|
[436] | 522 | |
---|
| 523 | // mask IRQs |
---|
| 524 | hal_disable_irq( &save_sr); |
---|
| 525 | |
---|
[457] | 526 | // client thread blocks itself |
---|
| 527 | thread_block( client_xp , THREAD_BLOCKED_RPC ); |
---|
[436] | 528 | |
---|
[409] | 529 | // take the lock protecting the copies |
---|
| 530 | remote_spinlock_lock( lock_xp ); |
---|
| 531 | |
---|
[436] | 532 | // initialize shared RPC descriptor |
---|
[438] | 533 | rpc.responses = 0; |
---|
| 534 | rpc.blocking = false; |
---|
| 535 | rpc.index = RPC_PROCESS_SIGACTION; |
---|
| 536 | rpc.thread = client; |
---|
| 537 | rpc.lid = client->core->lid; |
---|
[457] | 538 | rpc.args[0] = type; |
---|
[438] | 539 | rpc.args[1] = pid; |
---|
[436] | 540 | |
---|
[457] | 541 | // scan list of process copies |
---|
| 542 | // to send RPCs to remote copies |
---|
[409] | 543 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
| 544 | { |
---|
[457] | 545 | // get extended pointers and cluster on process |
---|
[440] | 546 | process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list ); |
---|
| 547 | process_cxy = GET_CXY( process_xp ); |
---|
[457] | 548 | process_ptr = GET_PTR( process_xp ); |
---|
[440] | 549 | |
---|
[457] | 550 | if( process_cxy == local_cxy ) // process is local |
---|
| 551 | { |
---|
| 552 | local = process_ptr; |
---|
| 553 | } |
---|
| 554 | else // process is remote |
---|
| 555 | { |
---|
| 556 | // update number of remote process copies |
---|
| 557 | remote_nr++; |
---|
| 558 | |
---|
| 559 | // atomically increment responses counter |
---|
| 560 | hal_atomic_add( (void *)&rpc.responses , 1 ); |
---|
| 561 | |
---|
[438] | 562 | #if DEBUG_PROCESS_SIGACTION |
---|
| 563 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[457] | 564 | printk("\n[DBG] %s : thread %x in process %x handles remote process %x in cluster %x\n", |
---|
| 565 | __FUNCTION__, client->trdid, client->process->pid, pid , process_cxy ); |
---|
[433] | 566 | #endif |
---|
[457] | 567 | // call RPC in target cluster |
---|
| 568 | rpc_process_sigaction_client( process_cxy , &rpc ); |
---|
| 569 | } |
---|
| 570 | } // end list of copies |
---|
| 571 | |
---|
[409] | 572 | // release the lock protecting process copies |
---|
| 573 | remote_spinlock_unlock( lock_xp ); |
---|
| 574 | |
---|
[436] | 575 | // restore IRQs |
---|
| 576 | hal_restore_irq( save_sr); |
---|
[409] | 577 | |
---|
[457] | 578 | // - if there is remote process copies, the client thread deschedules, |
---|
| 579 | // (it will be unblocked by the last RPC server thread). |
---|
| 580 | // - if there is no remote copies, the client thread unblock itself. |
---|
| 581 | if( remote_nr ) |
---|
| 582 | { |
---|
| 583 | sched_yield("blocked on rpc_process_sigaction"); |
---|
| 584 | } |
---|
| 585 | else |
---|
| 586 | { |
---|
| 587 | thread_unblock( client_xp , THREAD_BLOCKED_RPC ); |
---|
| 588 | } |
---|
[409] | 589 | |
---|
[457] | 590 | // handle the local process copy if required |
---|
| 591 | if( local != NULL ) |
---|
| 592 | { |
---|
| 593 | |
---|
| 594 | #if DEBUG_PROCESS_SIGACTION |
---|
| 595 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
| 596 | printk("\n[DBG] %s : thread %x in process %x handles local process %x in cluster %x\n", |
---|
| 597 | __FUNCTION__, client->trdid, client->process->pid, pid , local_cxy ); |
---|
| 598 | #endif |
---|
| 599 | if (type == DELETE_ALL_THREADS ) process_delete_threads ( local , client_xp ); |
---|
| 600 | else if(type == BLOCK_ALL_THREADS ) process_block_threads ( local , client_xp ); |
---|
| 601 | else if(type == UNBLOCK_ALL_THREADS ) process_unblock_threads( local ); |
---|
| 602 | } |
---|
| 603 | |
---|
[438] | 604 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 605 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 606 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[457] | 607 | printk("\n[DBG] %s : thread %x in process %x exit after %s process %x / cycle %d\n", |
---|
| 608 | __FUNCTION__, client->trdid, client->process->pid, |
---|
| 609 | process_action_str( type ), pid, cycle ); |
---|
[433] | 610 | #endif |
---|
[416] | 611 | |
---|
[409] | 612 | } // end process_sigaction() |
---|
| 613 | |
---|
[433] | 614 | ///////////////////////////////////////////////// |
---|
[440] | 615 | void process_block_threads( process_t * process, |
---|
| 616 | xptr_t client_xp ) |
---|
[1] | 617 | { |
---|
[409] | 618 | thread_t * target; // pointer on target thread |
---|
[433] | 619 | thread_t * this; // pointer on calling thread |
---|
[409] | 620 | uint32_t ltid; // index in process th_tbl |
---|
[436] | 621 | cxy_t owner_cxy; // target process owner cluster |
---|
[409] | 622 | uint32_t count; // requests counter |
---|
[436] | 623 | volatile uint32_t ack_count; // scheduler acknowledge counter |
---|
[1] | 624 | |
---|
[416] | 625 | // get calling thread pointer |
---|
[433] | 626 | this = CURRENT_THREAD; |
---|
[407] | 627 | |
---|
[436] | 628 | // get target process owner cluster |
---|
| 629 | owner_cxy = CXY_FROM_PID( process->pid ); |
---|
| 630 | |
---|
[438] | 631 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 632 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 633 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 634 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
| 635 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
| 636 | #endif |
---|
[409] | 637 | |
---|
| 638 | // get lock protecting process th_tbl[] |
---|
[1] | 639 | spinlock_lock( &process->th_lock ); |
---|
| 640 | |
---|
[440] | 641 | // loop on target process local threads |
---|
[409] | 642 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
[436] | 643 | for( ltid = 0 , count = 0 , ack_count = 0 ; count < process->th_nr ; ltid++ ) |
---|
[1] | 644 | { |
---|
[409] | 645 | target = process->th_tbl[ltid]; |
---|
[1] | 646 | |
---|
[436] | 647 | if( target != NULL ) // thread exist |
---|
[1] | 648 | { |
---|
| 649 | count++; |
---|
[409] | 650 | |
---|
[440] | 651 | // main thread and client thread should not be blocked |
---|
| 652 | if( ((ltid != 0) || (owner_cxy != local_cxy)) && // not main thread |
---|
| 653 | (client_xp) != XPTR( local_cxy , target ) ) // not client thread |
---|
[416] | 654 | { |
---|
| 655 | // set the global blocked bit in target thread descriptor. |
---|
[436] | 656 | thread_block( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL ); |
---|
| 657 | |
---|
| 658 | // - if the calling thread and the target thread are on the same core, |
---|
| 659 | // we don't need confirmation from scheduler, |
---|
| 660 | // - if the calling thread and the target thread are not running on the same |
---|
| 661 | // core, we ask the target scheduler to acknowlege the blocking |
---|
| 662 | // to be sure that the target thread is not running. |
---|
| 663 | |
---|
| 664 | if( this->core->lid != target->core->lid ) |
---|
| 665 | { |
---|
| 666 | // increment responses counter |
---|
| 667 | hal_atomic_add( (void*)&ack_count , 1 ); |
---|
[409] | 668 | |
---|
[436] | 669 | // set FLAG_REQ_ACK and &ack_rsp_count in target descriptor |
---|
| 670 | thread_set_req_ack( target , (uint32_t *)&ack_count ); |
---|
[409] | 671 | |
---|
[436] | 672 | // force scheduling on target thread |
---|
| 673 | dev_pic_send_ipi( local_cxy , target->core->lid ); |
---|
| 674 | } |
---|
[409] | 675 | } |
---|
[1] | 676 | } |
---|
[172] | 677 | } |
---|
| 678 | |
---|
[428] | 679 | // release lock protecting process th_tbl[] |
---|
[416] | 680 | spinlock_unlock( &process->th_lock ); |
---|
| 681 | |
---|
[436] | 682 | // wait acknowledges |
---|
[409] | 683 | while( 1 ) |
---|
| 684 | { |
---|
[436] | 685 | // exit when all scheduler acknoledges received |
---|
| 686 | if ( ack_count == 0 ) break; |
---|
[409] | 687 | |
---|
| 688 | // wait 1000 cycles before retry |
---|
| 689 | hal_fixed_delay( 1000 ); |
---|
| 690 | } |
---|
[1] | 691 | |
---|
[438] | 692 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 693 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 694 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 695 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
| 696 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
| 697 | #endif |
---|
[409] | 698 | |
---|
[428] | 699 | } // end process_block_threads() |
---|
[409] | 700 | |
---|
[440] | 701 | ///////////////////////////////////////////////// |
---|
| 702 | void process_delete_threads( process_t * process, |
---|
| 703 | xptr_t client_xp ) |
---|
[409] | 704 | { |
---|
[433] | 705 | thread_t * this; // pointer on calling thread |
---|
[440] | 706 | thread_t * target; // local pointer on target thread |
---|
| 707 | xptr_t target_xp; // extended pointer on target thread |
---|
| 708 | cxy_t owner_cxy; // owner process cluster |
---|
[409] | 709 | uint32_t ltid; // index in process th_tbl |
---|
[440] | 710 | uint32_t count; // threads counter |
---|
[409] | 711 | |
---|
[433] | 712 | // get calling thread pointer |
---|
| 713 | this = CURRENT_THREAD; |
---|
[409] | 714 | |
---|
[440] | 715 | // get target process owner cluster |
---|
| 716 | owner_cxy = CXY_FROM_PID( process->pid ); |
---|
| 717 | |
---|
[438] | 718 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 719 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 720 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 721 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
| 722 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
| 723 | #endif |
---|
| 724 | |
---|
[409] | 725 | // get lock protecting process th_tbl[] |
---|
| 726 | spinlock_lock( &process->th_lock ); |
---|
| 727 | |
---|
[440] | 728 | // loop on target process local threads |
---|
[416] | 729 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
[440] | 730 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
[1] | 731 | { |
---|
[409] | 732 | target = process->th_tbl[ltid]; |
---|
[1] | 733 | |
---|
[440] | 734 | if( target != NULL ) // valid thread |
---|
[1] | 735 | { |
---|
[416] | 736 | count++; |
---|
[440] | 737 | target_xp = XPTR( local_cxy , target ); |
---|
[1] | 738 | |
---|
[440] | 739 | // main thread and client thread should not be blocked |
---|
| 740 | if( ((ltid != 0) || (owner_cxy != local_cxy)) && // not main thread |
---|
| 741 | (client_xp) != target_xp ) // not client thread |
---|
| 742 | { |
---|
| 743 | // mark target thread for delete and block it |
---|
| 744 | thread_delete( target_xp , process->pid , false ); // not forced |
---|
| 745 | } |
---|
[409] | 746 | } |
---|
| 747 | } |
---|
[1] | 748 | |
---|
[428] | 749 | // release lock protecting process th_tbl[] |
---|
[416] | 750 | spinlock_unlock( &process->th_lock ); |
---|
[407] | 751 | |
---|
[438] | 752 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 753 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 754 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 755 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
| 756 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
| 757 | #endif |
---|
[407] | 758 | |
---|
[440] | 759 | } // end process_delete_threads() |
---|
[409] | 760 | |
---|
[440] | 761 | /////////////////////////////////////////////////// |
---|
| 762 | void process_unblock_threads( process_t * process ) |
---|
[409] | 763 | { |
---|
[440] | 764 | thread_t * target; // pointer on target thead |
---|
| 765 | thread_t * this; // pointer on calling thread |
---|
[409] | 766 | uint32_t ltid; // index in process th_tbl |
---|
[440] | 767 | uint32_t count; // requests counter |
---|
[409] | 768 | |
---|
[440] | 769 | // get calling thread pointer |
---|
| 770 | this = CURRENT_THREAD; |
---|
| 771 | |
---|
[438] | 772 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 773 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 774 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 775 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
[440] | 776 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
[433] | 777 | #endif |
---|
| 778 | |
---|
[416] | 779 | // get lock protecting process th_tbl[] |
---|
| 780 | spinlock_lock( &process->th_lock ); |
---|
| 781 | |
---|
[440] | 782 | // loop on process threads to unblock all threads |
---|
[416] | 783 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
[440] | 784 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
[409] | 785 | { |
---|
[416] | 786 | target = process->th_tbl[ltid]; |
---|
[409] | 787 | |
---|
[440] | 788 | if( target != NULL ) // thread found |
---|
[409] | 789 | { |
---|
| 790 | count++; |
---|
[440] | 791 | |
---|
| 792 | // reset the global blocked bit in target thread descriptor. |
---|
| 793 | thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL ); |
---|
[1] | 794 | } |
---|
| 795 | } |
---|
| 796 | |
---|
[428] | 797 | // release lock protecting process th_tbl[] |
---|
[416] | 798 | spinlock_unlock( &process->th_lock ); |
---|
[407] | 799 | |
---|
[438] | 800 | #if DEBUG_PROCESS_SIGACTION |
---|
[433] | 801 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 802 | if( DEBUG_PROCESS_SIGACTION < cycle ) |
---|
[433] | 803 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
[440] | 804 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
[433] | 805 | #endif |
---|
[1] | 806 | |
---|
[440] | 807 | } // end process_unblock_threads() |
---|
[407] | 808 | |
---|
[1] | 809 | /////////////////////////////////////////////// |
---|
| 810 | process_t * process_get_local_copy( pid_t pid ) |
---|
| 811 | { |
---|
| 812 | error_t error; |
---|
[172] | 813 | process_t * process_ptr; // local pointer on process |
---|
[23] | 814 | xptr_t process_xp; // extended pointer on process |
---|
[1] | 815 | |
---|
| 816 | cluster_t * cluster = LOCAL_CLUSTER; |
---|
| 817 | |
---|
| 818 | // get lock protecting local list of processes |
---|
[23] | 819 | remote_spinlock_lock( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
---|
[1] | 820 | |
---|
| 821 | // scan the local list of process descriptors to find the process |
---|
[23] | 822 | xptr_t iter; |
---|
| 823 | bool_t found = false; |
---|
| 824 | XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter ) |
---|
[1] | 825 | { |
---|
[23] | 826 | process_xp = XLIST_ELEMENT( iter , process_t , local_list ); |
---|
[435] | 827 | process_ptr = GET_PTR( process_xp ); |
---|
[23] | 828 | if( process_ptr->pid == pid ) |
---|
[1] | 829 | { |
---|
| 830 | found = true; |
---|
| 831 | break; |
---|
| 832 | } |
---|
| 833 | } |
---|
| 834 | |
---|
| 835 | // release lock protecting local list of processes |
---|
[23] | 836 | remote_spinlock_unlock( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
---|
[1] | 837 | |
---|
[172] | 838 | // allocate memory for a new local process descriptor |
---|
[440] | 839 | // and initialise it from reference cluster if not found |
---|
[1] | 840 | if( !found ) |
---|
| 841 | { |
---|
| 842 | // get extended pointer on reference process descriptor |
---|
[23] | 843 | xptr_t ref_xp = cluster_get_reference_process_from_pid( pid ); |
---|
[1] | 844 | |
---|
[492] | 845 | assert( (ref_xp != XPTR_NULL) , "illegal pid\n" ); |
---|
[23] | 846 | |
---|
[1] | 847 | // allocate memory for local process descriptor |
---|
[23] | 848 | process_ptr = process_alloc(); |
---|
[443] | 849 | |
---|
[23] | 850 | if( process_ptr == NULL ) return NULL; |
---|
[1] | 851 | |
---|
| 852 | // initialize local process descriptor copy |
---|
[23] | 853 | error = process_copy_init( process_ptr , ref_xp ); |
---|
[443] | 854 | |
---|
[1] | 855 | if( error ) return NULL; |
---|
| 856 | } |
---|
| 857 | |
---|
[440] | 858 | #if DEBUG_PROCESS_GET_LOCAL_COPY |
---|
| 859 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 860 | if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle ) |
---|
| 861 | printk("\n[DBG] %s : enter in cluster %x / pid %x / process %x / cycle %d\n", |
---|
| 862 | __FUNCTION__ , local_cxy , pid , process_ptr , cycle ); |
---|
| 863 | #endif |
---|
| 864 | |
---|
[23] | 865 | return process_ptr; |
---|
[1] | 866 | |
---|
[409] | 867 | } // end process_get_local_copy() |
---|
| 868 | |
---|
[436] | 869 | //////////////////////////////////////////// |
---|
| 870 | pid_t process_get_ppid( xptr_t process_xp ) |
---|
| 871 | { |
---|
| 872 | cxy_t process_cxy; |
---|
| 873 | process_t * process_ptr; |
---|
| 874 | xptr_t parent_xp; |
---|
| 875 | cxy_t parent_cxy; |
---|
| 876 | process_t * parent_ptr; |
---|
| 877 | |
---|
| 878 | // get process cluster and local pointer |
---|
| 879 | process_cxy = GET_CXY( process_xp ); |
---|
| 880 | process_ptr = GET_PTR( process_xp ); |
---|
| 881 | |
---|
| 882 | // get pointers on parent process |
---|
| 883 | parent_xp = (xptr_t)hal_remote_lwd( XPTR( process_cxy , &process_ptr->parent_xp ) ); |
---|
| 884 | parent_cxy = GET_CXY( parent_xp ); |
---|
| 885 | parent_ptr = GET_PTR( parent_xp ); |
---|
| 886 | |
---|
| 887 | return hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
| 888 | } |
---|
| 889 | |
---|
[1] | 890 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 891 | // File descriptor array related functions |
---|
| 892 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
| 893 | |
---|
| 894 | /////////////////////////////////////////// |
---|
| 895 | void process_fd_init( process_t * process ) |
---|
| 896 | { |
---|
| 897 | uint32_t fd; |
---|
| 898 | |
---|
| 899 | remote_spinlock_init( XPTR( local_cxy , &process->fd_array.lock ) ); |
---|
| 900 | |
---|
[23] | 901 | process->fd_array.current = 0; |
---|
| 902 | |
---|
[1] | 903 | // initialize array |
---|
[23] | 904 | for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ ) |
---|
[1] | 905 | { |
---|
| 906 | process->fd_array.array[fd] = XPTR_NULL; |
---|
| 907 | } |
---|
| 908 | } |
---|
| 909 | |
---|
[23] | 910 | ////////////////////////////// |
---|
[485] | 911 | bool_t process_fd_array_full( void ) |
---|
[1] | 912 | { |
---|
[172] | 913 | // get extended pointer on reference process |
---|
[23] | 914 | xptr_t ref_xp = CURRENT_THREAD->process->ref_xp; |
---|
[1] | 915 | |
---|
[23] | 916 | // get reference process cluster and local pointer |
---|
[435] | 917 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
[23] | 918 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
[1] | 919 | |
---|
[23] | 920 | // get number of open file descriptors from reference fd_array |
---|
| 921 | uint32_t current = hal_remote_lw( XPTR( ref_cxy , &ref_ptr->fd_array.current ) ); |
---|
| 922 | |
---|
[172] | 923 | return ( current >= CONFIG_PROCESS_FILE_MAX_NR ); |
---|
[1] | 924 | } |
---|
| 925 | |
---|
| 926 | ///////////////////////////////////////////////// |
---|
[407] | 927 | error_t process_fd_register( process_t * process, |
---|
| 928 | xptr_t file_xp, |
---|
| 929 | uint32_t * fdid ) |
---|
[1] | 930 | { |
---|
| 931 | bool_t found; |
---|
[23] | 932 | uint32_t id; |
---|
| 933 | xptr_t xp; |
---|
[1] | 934 | |
---|
[23] | 935 | // get reference process cluster and local pointer |
---|
[407] | 936 | xptr_t ref_xp = process->ref_xp; |
---|
[435] | 937 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
[23] | 938 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
| 939 | |
---|
| 940 | // take lock protecting reference fd_array |
---|
| 941 | remote_spinlock_lock( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) ); |
---|
| 942 | |
---|
[1] | 943 | found = false; |
---|
| 944 | |
---|
[23] | 945 | for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ ) |
---|
[1] | 946 | { |
---|
[23] | 947 | xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) ); |
---|
| 948 | if ( xp == XPTR_NULL ) |
---|
[1] | 949 | { |
---|
| 950 | found = true; |
---|
[23] | 951 | hal_remote_swd( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) , file_xp ); |
---|
| 952 | hal_remote_atomic_add( XPTR( ref_cxy , &ref_ptr->fd_array.current ) , 1 ); |
---|
[407] | 953 | *fdid = id; |
---|
[1] | 954 | break; |
---|
| 955 | } |
---|
| 956 | } |
---|
| 957 | |
---|
[23] | 958 | // release lock protecting reference fd_array |
---|
| 959 | remote_spinlock_unlock( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) ); |
---|
[1] | 960 | |
---|
[428] | 961 | if ( !found ) return -1; |
---|
[1] | 962 | else return 0; |
---|
[172] | 963 | } |
---|
[1] | 964 | |
---|
[172] | 965 | //////////////////////////////////////////////// |
---|
[23] | 966 | xptr_t process_fd_get_xptr( process_t * process, |
---|
[407] | 967 | uint32_t fdid ) |
---|
[1] | 968 | { |
---|
[23] | 969 | xptr_t file_xp; |
---|
[1] | 970 | |
---|
[23] | 971 | // access local copy of process descriptor |
---|
[407] | 972 | file_xp = process->fd_array.array[fdid]; |
---|
[1] | 973 | |
---|
[23] | 974 | if( file_xp == XPTR_NULL ) |
---|
| 975 | { |
---|
| 976 | // get reference process cluster and local pointer |
---|
| 977 | xptr_t ref_xp = process->ref_xp; |
---|
| 978 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
[435] | 979 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
[1] | 980 | |
---|
[23] | 981 | // access reference process descriptor |
---|
[407] | 982 | file_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->fd_array.array[fdid] ) ); |
---|
[1] | 983 | |
---|
[23] | 984 | // update local fd_array if found |
---|
| 985 | if( file_xp != XPTR_NULL ) |
---|
| 986 | { |
---|
[407] | 987 | process->fd_array.array[fdid] = file_xp; |
---|
[23] | 988 | } |
---|
| 989 | } |
---|
[1] | 990 | |
---|
[23] | 991 | return file_xp; |
---|
[1] | 992 | |
---|
[407] | 993 | } // end process_fd_get_xptr() |
---|
| 994 | |
---|
[1] | 995 | /////////////////////////////////////////// |
---|
| 996 | void process_fd_remote_copy( xptr_t dst_xp, |
---|
| 997 | xptr_t src_xp ) |
---|
| 998 | { |
---|
| 999 | uint32_t fd; |
---|
| 1000 | xptr_t entry; |
---|
| 1001 | |
---|
| 1002 | // get cluster and local pointer for src fd_array |
---|
| 1003 | cxy_t src_cxy = GET_CXY( src_xp ); |
---|
[435] | 1004 | fd_array_t * src_ptr = GET_PTR( src_xp ); |
---|
[1] | 1005 | |
---|
| 1006 | // get cluster and local pointer for dst fd_array |
---|
| 1007 | cxy_t dst_cxy = GET_CXY( dst_xp ); |
---|
[435] | 1008 | fd_array_t * dst_ptr = GET_PTR( dst_xp ); |
---|
[1] | 1009 | |
---|
| 1010 | // get the remote lock protecting the src fd_array |
---|
| 1011 | remote_spinlock_lock( XPTR( src_cxy , &src_ptr->lock ) ); |
---|
| 1012 | |
---|
[428] | 1013 | // loop on all fd_array entries |
---|
| 1014 | for( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ ) |
---|
[1] | 1015 | { |
---|
| 1016 | entry = (xptr_t)hal_remote_lwd( XPTR( src_cxy , &src_ptr->array[fd] ) ); |
---|
| 1017 | |
---|
| 1018 | if( entry != XPTR_NULL ) |
---|
| 1019 | { |
---|
[459] | 1020 | // increment file descriptor refcount |
---|
[1] | 1021 | vfs_file_count_up( entry ); |
---|
| 1022 | |
---|
| 1023 | // copy entry in destination process fd_array |
---|
| 1024 | hal_remote_swd( XPTR( dst_cxy , &dst_ptr->array[fd] ) , entry ); |
---|
| 1025 | } |
---|
| 1026 | } |
---|
| 1027 | |
---|
| 1028 | // release lock on source process fd_array |
---|
| 1029 | remote_spinlock_unlock( XPTR( src_cxy , &src_ptr->lock ) ); |
---|
| 1030 | |
---|
[407] | 1031 | } // end process_fd_remote_copy() |
---|
| 1032 | |
---|
[1] | 1033 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 1034 | // Thread related functions |
---|
| 1035 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 1036 | |
---|
| 1037 | ///////////////////////////////////////////////////// |
---|
| 1038 | error_t process_register_thread( process_t * process, |
---|
| 1039 | thread_t * thread, |
---|
| 1040 | trdid_t * trdid ) |
---|
| 1041 | { |
---|
[472] | 1042 | ltid_t ltid; |
---|
| 1043 | thread_type_t type; |
---|
| 1044 | reg_t save_sr; |
---|
| 1045 | bool_t found = false; |
---|
| 1046 | |
---|
[1] | 1047 | |
---|
[492] | 1048 | assert( (process != NULL) , "process argument is NULL" ); |
---|
[1] | 1049 | |
---|
[492] | 1050 | assert( (thread != NULL) , "thread argument is NULL" ); |
---|
[14] | 1051 | |
---|
[472] | 1052 | // take lock protecting th_tbl, depending on thread type: |
---|
| 1053 | // we don't want to use a descheduling policy for idle thread initialisation |
---|
| 1054 | if( type == THREAD_IDLE ) spinlock_lock_busy( &process->th_lock , &save_sr ); |
---|
| 1055 | else spinlock_lock( &process->th_lock ); |
---|
[428] | 1056 | |
---|
[407] | 1057 | // search a free slot in th_tbl[] |
---|
[428] | 1058 | for( ltid = 0 ; ltid < CONFIG_THREAD_MAX_PER_CLUSTER ; ltid++ ) |
---|
[1] | 1059 | { |
---|
| 1060 | if( process->th_tbl[ltid] == NULL ) |
---|
| 1061 | { |
---|
| 1062 | found = true; |
---|
| 1063 | break; |
---|
| 1064 | } |
---|
| 1065 | } |
---|
| 1066 | |
---|
| 1067 | if( found ) |
---|
| 1068 | { |
---|
| 1069 | // register thread in th_tbl[] |
---|
| 1070 | process->th_tbl[ltid] = thread; |
---|
| 1071 | process->th_nr++; |
---|
| 1072 | |
---|
| 1073 | // returns trdid |
---|
| 1074 | *trdid = TRDID( local_cxy , ltid ); |
---|
| 1075 | } |
---|
| 1076 | |
---|
[428] | 1077 | // release lock protecting th_tbl |
---|
| 1078 | hal_fence(); |
---|
[472] | 1079 | if( type == THREAD_IDLE ) spinlock_unlock_busy( &process->th_lock , save_sr ); |
---|
| 1080 | else spinlock_unlock( &process->th_lock ); |
---|
[428] | 1081 | |
---|
[1] | 1082 | return (found) ? 0 : ENOMEM; |
---|
[204] | 1083 | |
---|
| 1084 | } // end process_register_thread() |
---|
| 1085 | |
---|
[443] | 1086 | ///////////////////////////////////////////////// |
---|
| 1087 | bool_t process_remove_thread( thread_t * thread ) |
---|
[1] | 1088 | { |
---|
[443] | 1089 | uint32_t count; // number of threads in local process descriptor |
---|
| 1090 | |
---|
[492] | 1091 | assert( (thread != NULL) , "thread argument is NULL" ); |
---|
[172] | 1092 | |
---|
[1] | 1093 | process_t * process = thread->process; |
---|
| 1094 | |
---|
| 1095 | // get thread local index |
---|
| 1096 | ltid_t ltid = LTID_FROM_TRDID( thread->trdid ); |
---|
| 1097 | |
---|
[428] | 1098 | // take lock protecting th_tbl |
---|
| 1099 | spinlock_lock( &process->th_lock ); |
---|
| 1100 | |
---|
[443] | 1101 | count = process->th_nr; |
---|
[428] | 1102 | |
---|
[492] | 1103 | assert( (count > 0) , "process th_nr cannot be 0\n" ); |
---|
[443] | 1104 | |
---|
[1] | 1105 | // remove thread from th_tbl[] |
---|
| 1106 | process->th_tbl[ltid] = NULL; |
---|
[450] | 1107 | process->th_nr = count-1; |
---|
[1] | 1108 | |
---|
[443] | 1109 | // release lock protecting th_tbl |
---|
[428] | 1110 | hal_fence(); |
---|
| 1111 | spinlock_unlock( &process->th_lock ); |
---|
| 1112 | |
---|
[443] | 1113 | return (count == 1); |
---|
| 1114 | |
---|
[450] | 1115 | } // end process_remove_thread() |
---|
[204] | 1116 | |
---|
[408] | 1117 | ///////////////////////////////////////////////////////// |
---|
| 1118 | error_t process_make_fork( xptr_t parent_process_xp, |
---|
| 1119 | xptr_t parent_thread_xp, |
---|
| 1120 | pid_t * child_pid, |
---|
| 1121 | thread_t ** child_thread ) |
---|
[1] | 1122 | { |
---|
[408] | 1123 | process_t * process; // local pointer on child process descriptor |
---|
| 1124 | thread_t * thread; // local pointer on child thread descriptor |
---|
| 1125 | pid_t new_pid; // process identifier for child process |
---|
| 1126 | pid_t parent_pid; // process identifier for parent process |
---|
| 1127 | xptr_t ref_xp; // extended pointer on reference process |
---|
[428] | 1128 | xptr_t vfs_bin_xp; // extended pointer on .elf file |
---|
[408] | 1129 | error_t error; |
---|
[1] | 1130 | |
---|
[408] | 1131 | // get cluster and local pointer for parent process |
---|
| 1132 | cxy_t parent_process_cxy = GET_CXY( parent_process_xp ); |
---|
[435] | 1133 | process_t * parent_process_ptr = GET_PTR( parent_process_xp ); |
---|
[101] | 1134 | |
---|
[428] | 1135 | // get parent process PID and extended pointer on .elf file |
---|
| 1136 | parent_pid = hal_remote_lw (XPTR( parent_process_cxy , &parent_process_ptr->pid)); |
---|
| 1137 | vfs_bin_xp = hal_remote_lwd(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp)); |
---|
| 1138 | |
---|
[438] | 1139 | // check parent process is the reference process |
---|
[408] | 1140 | ref_xp = hal_remote_lwd( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) ); |
---|
[438] | 1141 | |
---|
[492] | 1142 | assert( (parent_process_xp == ref_xp ) , |
---|
[408] | 1143 | "parent process must be the reference process\n" ); |
---|
[407] | 1144 | |
---|
[438] | 1145 | #if DEBUG_PROCESS_MAKE_FORK |
---|
[433] | 1146 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1147 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[457] | 1148 | printk("\n[DBG] %s : thread %x in process %x enter / cluster %x / cycle %d\n", |
---|
| 1149 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, local_cxy, cycle ); |
---|
[433] | 1150 | #endif |
---|
[172] | 1151 | |
---|
[408] | 1152 | // allocate a process descriptor |
---|
| 1153 | process = process_alloc(); |
---|
| 1154 | if( process == NULL ) |
---|
| 1155 | { |
---|
| 1156 | printk("\n[ERROR] in %s : cannot get process in cluster %x\n", |
---|
| 1157 | __FUNCTION__, local_cxy ); |
---|
| 1158 | return -1; |
---|
| 1159 | } |
---|
[1] | 1160 | |
---|
[408] | 1161 | // allocate a child PID from local cluster |
---|
[416] | 1162 | error = cluster_pid_alloc( process , &new_pid ); |
---|
[428] | 1163 | if( error ) |
---|
[1] | 1164 | { |
---|
[408] | 1165 | printk("\n[ERROR] in %s : cannot get PID in cluster %x\n", |
---|
| 1166 | __FUNCTION__, local_cxy ); |
---|
| 1167 | process_free( process ); |
---|
| 1168 | return -1; |
---|
[1] | 1169 | } |
---|
[408] | 1170 | |
---|
[469] | 1171 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
[457] | 1172 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 1173 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
| 1174 | printk("\n[DBG] %s : thread %x in process %x allocated process %x / cycle %d\n", |
---|
| 1175 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, new_pid, cycle ); |
---|
| 1176 | #endif |
---|
| 1177 | |
---|
[408] | 1178 | // initializes child process descriptor from parent process descriptor |
---|
| 1179 | process_reference_init( process, |
---|
| 1180 | new_pid, |
---|
| 1181 | parent_process_xp ); |
---|
| 1182 | |
---|
[438] | 1183 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
[433] | 1184 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1185 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[457] | 1186 | printk("\n[DBG] %s : thread %x in process %x initialized child_process %x / cycle %d\n", |
---|
| 1187 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, new_pid, cycle ); |
---|
[433] | 1188 | #endif |
---|
[408] | 1189 | |
---|
[457] | 1190 | // give TXT ownership to child process |
---|
| 1191 | process_txt_set_ownership( XPTR( local_cxy , process ) ); |
---|
| 1192 | |
---|
[408] | 1193 | // copy VMM from parent descriptor to child descriptor |
---|
| 1194 | error = vmm_fork_copy( process, |
---|
| 1195 | parent_process_xp ); |
---|
| 1196 | if( error ) |
---|
[101] | 1197 | { |
---|
[408] | 1198 | printk("\n[ERROR] in %s : cannot copy VMM in cluster %x\n", |
---|
| 1199 | __FUNCTION__, local_cxy ); |
---|
| 1200 | process_free( process ); |
---|
| 1201 | cluster_pid_release( new_pid ); |
---|
| 1202 | return -1; |
---|
[101] | 1203 | } |
---|
[172] | 1204 | |
---|
[438] | 1205 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
[433] | 1206 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1207 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[457] | 1208 | printk("\n[DBG] %s : thread %x in process %x copied VMM from parent %x to child %x / cycle %d\n", |
---|
| 1209 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, |
---|
| 1210 | parent_pid, new_pid, cycle ); |
---|
[433] | 1211 | #endif |
---|
[407] | 1212 | |
---|
[457] | 1213 | // parent process gives TXT ownership to child process if required |
---|
| 1214 | if( process_txt_is_owner(parent_process_xp) ) |
---|
| 1215 | { |
---|
| 1216 | process_txt_set_ownership( XPTR( local_cxy , process ) ); |
---|
| 1217 | |
---|
| 1218 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
| 1219 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 1220 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
| 1221 | printk("\n[DBG] %s : thread %x in process %x gives TXT from parent %x to child %x / cycle %d\n", |
---|
| 1222 | __FUNCTION__ , CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, |
---|
| 1223 | parent_pid, new_pid, cycle ); |
---|
| 1224 | #endif |
---|
| 1225 | |
---|
| 1226 | } |
---|
| 1227 | |
---|
[428] | 1228 | // update extended pointer on .elf file |
---|
| 1229 | process->vfs_bin_xp = vfs_bin_xp; |
---|
| 1230 | |
---|
[408] | 1231 | // create child thread descriptor from parent thread descriptor |
---|
| 1232 | error = thread_user_fork( parent_thread_xp, |
---|
| 1233 | process, |
---|
| 1234 | &thread ); |
---|
| 1235 | if( error ) |
---|
| 1236 | { |
---|
| 1237 | printk("\n[ERROR] in %s : cannot create thread in cluster %x\n", |
---|
| 1238 | __FUNCTION__, local_cxy ); |
---|
| 1239 | process_free( process ); |
---|
| 1240 | cluster_pid_release( new_pid ); |
---|
| 1241 | return -1; |
---|
| 1242 | } |
---|
[172] | 1243 | |
---|
[438] | 1244 | // check main thread LTID |
---|
[492] | 1245 | assert( (LTID_FROM_TRDID(thread->trdid) == 0) , |
---|
[438] | 1246 | "main thread must have LTID == 0\n" ); |
---|
[428] | 1247 | |
---|
[469] | 1248 | //#if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
| 1249 | #if DEBUG_PROCESS_MAKE_FORK |
---|
[433] | 1250 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1251 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[469] | 1252 | printk("\n[DBG] %s : thread %x in process %x created main thread %x / cycle %d\n", |
---|
| 1253 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, thread, cycle ); |
---|
[433] | 1254 | #endif |
---|
[1] | 1255 | |
---|
[433] | 1256 | // set Copy_On_Write flag in parent process GPT |
---|
[408] | 1257 | // this includes all replicated GPT copies |
---|
| 1258 | if( parent_process_cxy == local_cxy ) // reference is local |
---|
| 1259 | { |
---|
| 1260 | vmm_set_cow( parent_process_ptr ); |
---|
| 1261 | } |
---|
| 1262 | else // reference is remote |
---|
| 1263 | { |
---|
| 1264 | rpc_vmm_set_cow_client( parent_process_cxy, |
---|
| 1265 | parent_process_ptr ); |
---|
| 1266 | } |
---|
[1] | 1267 | |
---|
[433] | 1268 | // set Copy_On_Write flag in child process GPT |
---|
| 1269 | vmm_set_cow( process ); |
---|
| 1270 | |
---|
[438] | 1271 | #if( DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
[433] | 1272 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1273 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[457] | 1274 | printk("\n[DBG] %s : thread %x in process %x set COW in parent and child / cycle %d\n", |
---|
| 1275 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, cycle ); |
---|
[433] | 1276 | #endif |
---|
[101] | 1277 | |
---|
[428] | 1278 | // get extended pointers on parent children_root, children_lock and children_nr |
---|
| 1279 | xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root ); |
---|
| 1280 | xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock ); |
---|
| 1281 | xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr ); |
---|
[101] | 1282 | |
---|
[428] | 1283 | // register process in parent children list |
---|
| 1284 | remote_spinlock_lock( children_lock_xp ); |
---|
| 1285 | xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) ); |
---|
| 1286 | hal_remote_atomic_add( children_nr_xp , 1 ); |
---|
| 1287 | remote_spinlock_unlock( children_lock_xp ); |
---|
[204] | 1288 | |
---|
[408] | 1289 | // return success |
---|
| 1290 | *child_thread = thread; |
---|
| 1291 | *child_pid = new_pid; |
---|
[1] | 1292 | |
---|
[438] | 1293 | #if DEBUG_PROCESS_MAKE_FORK |
---|
[433] | 1294 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1295 | if( DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
[457] | 1296 | printk("\n[DBG] %s : thread %x in process %x exit / created process %x / cycle %d\n", |
---|
| 1297 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, new_pid, cycle ); |
---|
[433] | 1298 | #endif |
---|
[428] | 1299 | |
---|
[408] | 1300 | return 0; |
---|
| 1301 | |
---|
[416] | 1302 | } // end process_make_fork() |
---|
[408] | 1303 | |
---|
| 1304 | ///////////////////////////////////////////////////// |
---|
| 1305 | error_t process_make_exec( exec_info_t * exec_info ) |
---|
| 1306 | { |
---|
[457] | 1307 | thread_t * thread; // local pointer on this thread |
---|
| 1308 | process_t * process; // local pointer on this process |
---|
| 1309 | pid_t pid; // this process identifier |
---|
[441] | 1310 | error_t error; // value returned by called functions |
---|
[457] | 1311 | char * path; // path to .elf file |
---|
| 1312 | xptr_t file_xp; // extended pointer on .elf file descriptor |
---|
| 1313 | uint32_t file_id; // file index in fd_array |
---|
| 1314 | uint32_t args_nr; // number of main thread arguments |
---|
| 1315 | char ** args_pointers; // array of pointers on main thread arguments |
---|
[446] | 1316 | |
---|
[457] | 1317 | // get thread, process & PID |
---|
| 1318 | thread = CURRENT_THREAD; |
---|
| 1319 | process = thread->process; |
---|
| 1320 | pid = process->pid; |
---|
[408] | 1321 | |
---|
[457] | 1322 | // get relevant infos from exec_info |
---|
| 1323 | path = exec_info->path; |
---|
| 1324 | args_nr = exec_info->args_nr; |
---|
| 1325 | args_pointers = exec_info->args_pointers; |
---|
[408] | 1326 | |
---|
[438] | 1327 | #if DEBUG_PROCESS_MAKE_EXEC |
---|
[433] | 1328 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1329 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
[446] | 1330 | printk("\n[DBG] %s : thread %x in process %x enters / path %s / cycle %d\n", |
---|
[457] | 1331 | __FUNCTION__, thread->trdid, pid, path, cycle ); |
---|
[433] | 1332 | #endif |
---|
[408] | 1333 | |
---|
[457] | 1334 | // open the file identified by <path> |
---|
| 1335 | file_xp = XPTR_NULL; |
---|
| 1336 | file_id = -1; |
---|
| 1337 | error = vfs_open( process, |
---|
| 1338 | path, |
---|
| 1339 | O_RDONLY, |
---|
| 1340 | 0, |
---|
| 1341 | &file_xp, |
---|
| 1342 | &file_id ); |
---|
| 1343 | if( error ) |
---|
| 1344 | { |
---|
| 1345 | printk("\n[ERROR] in %s : failed to open file <%s>\n", __FUNCTION__ , path ); |
---|
| 1346 | return -1; |
---|
| 1347 | } |
---|
| 1348 | |
---|
[446] | 1349 | #if (DEBUG_PROCESS_MAKE_EXEC & 1) |
---|
[469] | 1350 | cycle = (uint32_t)hal_get_cycles(); |
---|
[446] | 1351 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
[469] | 1352 | printk("\n[DBG] %s : thread %x in process %x opened file <%s> / cycle %d\n", |
---|
| 1353 | __FUNCTION__, thread->trdid, pid, path, cycle ); |
---|
[446] | 1354 | #endif |
---|
| 1355 | |
---|
[457] | 1356 | // delete all threads other than this main thread in all clusters |
---|
| 1357 | process_sigaction( pid , DELETE_ALL_THREADS ); |
---|
[446] | 1358 | |
---|
[469] | 1359 | #if (DEBUG_PROCESS_MAKE_EXEC & 1) |
---|
| 1360 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 1361 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
| 1362 | printk("\n[DBG] %s : thread %x in process %x deleted all threads / cycle %d\n", |
---|
| 1363 | __FUNCTION__, thread->trdid, pid, cycle ); |
---|
| 1364 | #endif |
---|
| 1365 | |
---|
[457] | 1366 | // reset local process VMM |
---|
| 1367 | vmm_destroy( process ); |
---|
[446] | 1368 | |
---|
[457] | 1369 | #if( DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
| 1370 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 1371 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
[469] | 1372 | printk("\n[DBG] %s : thread %x in process %x reset VMM / cycle %d\n", |
---|
[457] | 1373 | __FUNCTION__, thread->trdid, pid, cycle ); |
---|
| 1374 | #endif |
---|
[408] | 1375 | |
---|
[457] | 1376 | // re-initialize the VMM (kentry/args/envs vsegs registration) |
---|
| 1377 | error = vmm_init( process ); |
---|
| 1378 | if( error ) |
---|
[416] | 1379 | { |
---|
[457] | 1380 | printk("\n[ERROR] in %s : cannot initialise VMM for %s\n", __FUNCTION__ , path ); |
---|
| 1381 | vfs_close( file_xp , file_id ); |
---|
| 1382 | // FIXME restore old process VMM |
---|
[416] | 1383 | return -1; |
---|
| 1384 | } |
---|
[457] | 1385 | |
---|
[438] | 1386 | #if( DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
[433] | 1387 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1388 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
[457] | 1389 | printk("\n[DBG] %s : thread %x in process %x / kentry/args/envs vsegs registered / cycle %d\n", |
---|
| 1390 | __FUNCTION__, thread->trdid, pid, cycle ); |
---|
[433] | 1391 | #endif |
---|
[428] | 1392 | |
---|
[457] | 1393 | // register code & data vsegs as well as entry-point in process VMM, |
---|
[428] | 1394 | // and register extended pointer on .elf file in process descriptor |
---|
[457] | 1395 | error = elf_load_process( file_xp , process ); |
---|
[441] | 1396 | if( error ) |
---|
[1] | 1397 | { |
---|
[441] | 1398 | printk("\n[ERROR] in %s : failed to access <%s>\n", __FUNCTION__ , path ); |
---|
[457] | 1399 | vfs_close( file_xp , file_id ); |
---|
| 1400 | // FIXME restore old process VMM |
---|
[408] | 1401 | return -1; |
---|
[1] | 1402 | } |
---|
| 1403 | |
---|
[438] | 1404 | #if( DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
[433] | 1405 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1406 | if( DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
[457] | 1407 | printk("\n[DBG] %s : thread %x in process %x / code/data vsegs registered / cycle %d\n", |
---|
| 1408 | __FUNCTION__, thread->trdid, pid, cycle ); |
---|
[433] | 1409 | #endif |
---|
[1] | 1410 | |
---|
[457] | 1411 | // update the existing main thread descriptor... and jump to user code |
---|
| 1412 | error = thread_user_exec( (void *)process->vmm.entry_point, |
---|
| 1413 | args_nr, |
---|
| 1414 | args_pointers ); |
---|
| 1415 | if( error ) |
---|
| 1416 | { |
---|
[469] | 1417 | printk("\n[ERROR] in %s : cannot update main thread for %s\n", __FUNCTION__ , path ); |
---|
[457] | 1418 | vfs_close( file_xp , file_id ); |
---|
| 1419 | // FIXME restore old process VMM |
---|
[408] | 1420 | return -1; |
---|
[457] | 1421 | } |
---|
[1] | 1422 | |
---|
[492] | 1423 | assert( false, "we should not execute this code"); |
---|
[457] | 1424 | |
---|
[409] | 1425 | return 0; |
---|
| 1426 | |
---|
| 1427 | } // end process_make_exec() |
---|
| 1428 | |
---|
[457] | 1429 | |
---|
[428] | 1430 | /////////////////////////////////////////////// |
---|
| 1431 | void process_zero_create( process_t * process ) |
---|
| 1432 | { |
---|
| 1433 | |
---|
[438] | 1434 | #if DEBUG_PROCESS_ZERO_CREATE |
---|
[433] | 1435 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1436 | if( DEBUG_PROCESS_ZERO_CREATE < cycle ) |
---|
[433] | 1437 | printk("\n[DBG] %s : thread %x enter / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
| 1438 | #endif |
---|
[428] | 1439 | |
---|
| 1440 | // initialize PID, REF_XP, PARENT_XP, and STATE |
---|
[433] | 1441 | process->pid = 0; |
---|
| 1442 | process->ref_xp = XPTR( local_cxy , process ); |
---|
[443] | 1443 | process->owner_xp = XPTR( local_cxy , process ); |
---|
[433] | 1444 | process->parent_xp = XPTR_NULL; |
---|
| 1445 | process->term_state = 0; |
---|
[428] | 1446 | |
---|
| 1447 | // reset th_tbl[] array as empty |
---|
| 1448 | uint32_t i; |
---|
| 1449 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
---|
| 1450 | { |
---|
| 1451 | process->th_tbl[i] = NULL; |
---|
| 1452 | } |
---|
| 1453 | process->th_nr = 0; |
---|
| 1454 | spinlock_init( &process->th_lock ); |
---|
| 1455 | |
---|
| 1456 | // reset children list as empty |
---|
| 1457 | xlist_root_init( XPTR( local_cxy , &process->children_root ) ); |
---|
| 1458 | remote_spinlock_init( XPTR( local_cxy , &process->children_lock ) ); |
---|
| 1459 | process->children_nr = 0; |
---|
| 1460 | |
---|
| 1461 | hal_fence(); |
---|
| 1462 | |
---|
[438] | 1463 | #if DEBUG_PROCESS_ZERO_CREATE |
---|
[433] | 1464 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1465 | if( DEBUG_PROCESS_ZERO_CREATE < cycle ) |
---|
[433] | 1466 | printk("\n[DBG] %s : thread %x exit / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
| 1467 | #endif |
---|
[428] | 1468 | |
---|
| 1469 | } // end process_zero_init() |
---|
| 1470 | |
---|
[1] | 1471 | ////////////////////////// |
---|
[485] | 1472 | void process_init_create( void ) |
---|
[1] | 1473 | { |
---|
[428] | 1474 | process_t * process; // local pointer on process descriptor |
---|
[409] | 1475 | pid_t pid; // process_init identifier |
---|
| 1476 | thread_t * thread; // local pointer on main thread |
---|
| 1477 | pthread_attr_t attr; // main thread attributes |
---|
| 1478 | lid_t lid; // selected core local index for main thread |
---|
[457] | 1479 | xptr_t file_xp; // extended pointer on .elf file descriptor |
---|
| 1480 | uint32_t file_id; // file index in fd_array |
---|
[409] | 1481 | error_t error; |
---|
[1] | 1482 | |
---|
[438] | 1483 | #if DEBUG_PROCESS_INIT_CREATE |
---|
[433] | 1484 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1485 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
[457] | 1486 | printk("\n[DBG] %s : thread %x in process %x enter / cycle %d\n", |
---|
| 1487 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, cycle ); |
---|
[433] | 1488 | #endif |
---|
[1] | 1489 | |
---|
[408] | 1490 | // allocates memory for process descriptor from local cluster |
---|
| 1491 | process = process_alloc(); |
---|
[457] | 1492 | |
---|
[492] | 1493 | assert( (process != NULL), |
---|
[457] | 1494 | "no memory for process descriptor in cluster %x\n", local_cxy ); |
---|
[101] | 1495 | |
---|
[409] | 1496 | // get PID from local cluster |
---|
[416] | 1497 | error = cluster_pid_alloc( process , &pid ); |
---|
[408] | 1498 | |
---|
[492] | 1499 | assert( (error == 0), |
---|
[457] | 1500 | "cannot allocate PID in cluster %x\n", local_cxy ); |
---|
[409] | 1501 | |
---|
[492] | 1502 | assert( (pid == 1) , |
---|
[457] | 1503 | "process INIT must be first process in cluster 0\n" ); |
---|
| 1504 | |
---|
[409] | 1505 | // initialize process descriptor / parent is local process_zero |
---|
| 1506 | process_reference_init( process, |
---|
[408] | 1507 | pid, |
---|
[457] | 1508 | XPTR( local_cxy , &process_zero ) ); |
---|
[408] | 1509 | |
---|
[457] | 1510 | // open the file identified by CONFIG_PROCESS_INIT_PATH |
---|
| 1511 | file_xp = XPTR_NULL; |
---|
| 1512 | file_id = -1; |
---|
| 1513 | error = vfs_open( process, |
---|
| 1514 | CONFIG_PROCESS_INIT_PATH, |
---|
| 1515 | O_RDONLY, |
---|
| 1516 | 0, |
---|
| 1517 | &file_xp, |
---|
| 1518 | &file_id ); |
---|
| 1519 | |
---|
[492] | 1520 | assert( (error == 0), |
---|
[457] | 1521 | "failed to open file <%s>\n", CONFIG_PROCESS_INIT_PATH ); |
---|
| 1522 | |
---|
[409] | 1523 | // register "code" and "data" vsegs as well as entry-point |
---|
| 1524 | // in process VMM, using information contained in the elf file. |
---|
[457] | 1525 | error = elf_load_process( file_xp , process ); |
---|
[101] | 1526 | |
---|
[492] | 1527 | assert( (error == 0), |
---|
[457] | 1528 | "cannot access .elf file <%s>\n", CONFIG_PROCESS_INIT_PATH ); |
---|
| 1529 | |
---|
[428] | 1530 | // get extended pointers on process_zero children_root, children_lock |
---|
| 1531 | xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root ); |
---|
| 1532 | xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock ); |
---|
| 1533 | |
---|
| 1534 | // register process INIT in parent local process_zero |
---|
| 1535 | remote_spinlock_lock( children_lock_xp ); |
---|
| 1536 | xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) ); |
---|
| 1537 | hal_atomic_add( &process_zero.children_nr , 1 ); |
---|
| 1538 | remote_spinlock_unlock( children_lock_xp ); |
---|
| 1539 | |
---|
[409] | 1540 | // select a core in local cluster to execute the main thread |
---|
| 1541 | lid = cluster_select_local_core(); |
---|
| 1542 | |
---|
| 1543 | // initialize pthread attributes for main thread |
---|
| 1544 | attr.attributes = PT_ATTR_DETACH | PT_ATTR_CLUSTER_DEFINED | PT_ATTR_CORE_DEFINED; |
---|
| 1545 | attr.cxy = local_cxy; |
---|
| 1546 | attr.lid = lid; |
---|
| 1547 | |
---|
| 1548 | // create and initialize thread descriptor |
---|
| 1549 | error = thread_user_create( pid, |
---|
| 1550 | (void *)process->vmm.entry_point, |
---|
| 1551 | NULL, |
---|
| 1552 | &attr, |
---|
| 1553 | &thread ); |
---|
[1] | 1554 | |
---|
[492] | 1555 | assert( (error == 0), |
---|
[457] | 1556 | "cannot create main thread for <%s>\n", CONFIG_PROCESS_INIT_PATH ); |
---|
[428] | 1557 | |
---|
[492] | 1558 | assert( (thread->trdid == 0), |
---|
[457] | 1559 | "main thread must have index 0 for <%s>\n", CONFIG_PROCESS_INIT_PATH ); |
---|
| 1560 | |
---|
[409] | 1561 | // activate thread |
---|
| 1562 | thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL ); |
---|
| 1563 | |
---|
[124] | 1564 | hal_fence(); |
---|
[1] | 1565 | |
---|
[438] | 1566 | #if DEBUG_PROCESS_INIT_CREATE |
---|
[433] | 1567 | cycle = (uint32_t)hal_get_cycles(); |
---|
[438] | 1568 | if( DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
[457] | 1569 | printk("\n[DBG] %s : thread %x in process %x exit / cycle %d\n", |
---|
| 1570 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, cycle ); |
---|
[433] | 1571 | #endif |
---|
[409] | 1572 | |
---|
[204] | 1573 | } // end process_init_create() |
---|
| 1574 | |
---|
[428] | 1575 | ///////////////////////////////////////// |
---|
| 1576 | void process_display( xptr_t process_xp ) |
---|
| 1577 | { |
---|
| 1578 | process_t * process_ptr; |
---|
| 1579 | cxy_t process_cxy; |
---|
[443] | 1580 | |
---|
[428] | 1581 | xptr_t parent_xp; // extended pointer on parent process |
---|
| 1582 | process_t * parent_ptr; |
---|
| 1583 | cxy_t parent_cxy; |
---|
| 1584 | |
---|
[443] | 1585 | xptr_t owner_xp; // extended pointer on owner process |
---|
| 1586 | process_t * owner_ptr; |
---|
| 1587 | cxy_t owner_cxy; |
---|
| 1588 | |
---|
[428] | 1589 | pid_t pid; |
---|
| 1590 | pid_t ppid; |
---|
| 1591 | uint32_t state; |
---|
| 1592 | uint32_t th_nr; |
---|
| 1593 | |
---|
[443] | 1594 | xptr_t txt_file_xp; // extended pointer on TXT_RX file descriptor |
---|
| 1595 | xptr_t txt_chdev_xp; // extended pointer on TXT_RX chdev |
---|
| 1596 | chdev_t * txt_chdev_ptr; |
---|
| 1597 | cxy_t txt_chdev_cxy; |
---|
| 1598 | xptr_t txt_owner_xp; // extended pointer on TXT owner process |
---|
[428] | 1599 | |
---|
| 1600 | xptr_t elf_file_xp; // extended pointer on .elf file |
---|
| 1601 | cxy_t elf_file_cxy; |
---|
| 1602 | vfs_file_t * elf_file_ptr; |
---|
| 1603 | vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode |
---|
| 1604 | |
---|
| 1605 | char txt_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1606 | char elf_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
| 1607 | |
---|
| 1608 | // get cluster and local pointer on process |
---|
| 1609 | process_ptr = GET_PTR( process_xp ); |
---|
| 1610 | process_cxy = GET_CXY( process_xp ); |
---|
| 1611 | |
---|
| 1612 | // get PID and state |
---|
| 1613 | pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
[433] | 1614 | state = hal_remote_lw( XPTR( process_cxy , &process_ptr->term_state ) ); |
---|
[428] | 1615 | |
---|
| 1616 | // get PPID |
---|
| 1617 | parent_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->parent_xp ) ); |
---|
| 1618 | parent_cxy = GET_CXY( parent_xp ); |
---|
| 1619 | parent_ptr = GET_PTR( parent_xp ); |
---|
| 1620 | ppid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
| 1621 | |
---|
| 1622 | // get number of threads |
---|
| 1623 | th_nr = hal_remote_lw( XPTR( process_cxy , &process_ptr->th_nr ) ); |
---|
| 1624 | |
---|
[443] | 1625 | // get pointers on owner process descriptor |
---|
| 1626 | owner_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->owner_xp ) ); |
---|
| 1627 | owner_cxy = GET_CXY( owner_xp ); |
---|
| 1628 | owner_ptr = GET_PTR( owner_xp ); |
---|
[428] | 1629 | |
---|
[443] | 1630 | // get extended pointer on TXT_RX file descriptor attached to process |
---|
| 1631 | txt_file_xp = hal_remote_lwd( XPTR( owner_cxy , &owner_ptr->fd_array.array[0] ) ); |
---|
| 1632 | |
---|
[492] | 1633 | assert( (txt_file_xp != XPTR_NULL) , |
---|
[428] | 1634 | "process must be attached to one TXT terminal\n" ); |
---|
| 1635 | |
---|
[443] | 1636 | // get TXT_RX chdev pointers |
---|
| 1637 | txt_chdev_xp = chdev_from_file( txt_file_xp ); |
---|
| 1638 | txt_chdev_cxy = GET_CXY( txt_chdev_xp ); |
---|
| 1639 | txt_chdev_ptr = GET_PTR( txt_chdev_xp ); |
---|
| 1640 | |
---|
| 1641 | // get TXT_RX name and ownership |
---|
[428] | 1642 | hal_remote_strcpy( XPTR( local_cxy , txt_name ) , |
---|
[443] | 1643 | XPTR( txt_chdev_cxy , txt_chdev_ptr->name ) ); |
---|
[428] | 1644 | |
---|
[443] | 1645 | txt_owner_xp = (xptr_t)hal_remote_lwd( XPTR( txt_chdev_cxy, |
---|
| 1646 | &txt_chdev_ptr->ext.txt.owner_xp ) ); |
---|
| 1647 | |
---|
[428] | 1648 | // get process .elf name |
---|
| 1649 | elf_file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) ); |
---|
| 1650 | elf_file_cxy = GET_CXY( elf_file_xp ); |
---|
| 1651 | elf_file_ptr = (vfs_file_t *)GET_PTR( elf_file_xp ); |
---|
| 1652 | elf_inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) ); |
---|
| 1653 | vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name ); |
---|
| 1654 | |
---|
| 1655 | // display process info |
---|
[443] | 1656 | if( txt_owner_xp == process_xp ) |
---|
[428] | 1657 | { |
---|
[446] | 1658 | nolock_printk("PID %X | PPID %X | TS %X | %s (FG) | %X | %d | %s\n", |
---|
[433] | 1659 | pid, ppid, state, txt_name, process_ptr, th_nr, elf_name ); |
---|
[428] | 1660 | } |
---|
| 1661 | else |
---|
| 1662 | { |
---|
[446] | 1663 | nolock_printk("PID %X | PPID %X | TS %X | %s (BG) | %X | %d | %s\n", |
---|
[433] | 1664 | pid, ppid, state, txt_name, process_ptr, th_nr, elf_name ); |
---|
[428] | 1665 | } |
---|
| 1666 | } // end process_display() |
---|
| 1667 | |
---|
| 1668 | |
---|
| 1669 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
| 1670 | // Terminals related functions |
---|
| 1671 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
| 1672 | |
---|
| 1673 | //////////////////////////// |
---|
[485] | 1674 | uint32_t process_txt_alloc( void ) |
---|
[428] | 1675 | { |
---|
| 1676 | uint32_t index; // TXT terminal index |
---|
| 1677 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
| 1678 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
| 1679 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
| 1680 | xptr_t root_xp; // extended pointer on owner field in chdev |
---|
| 1681 | |
---|
| 1682 | // scan the user TXT_RX chdevs (TXT0 is reserved for kernel) |
---|
| 1683 | for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ ) |
---|
| 1684 | { |
---|
| 1685 | // get pointers on TXT_RX[index] |
---|
| 1686 | chdev_xp = chdev_dir.txt_rx[index]; |
---|
| 1687 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
| 1688 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
| 1689 | |
---|
| 1690 | // get extended pointer on root of attached process |
---|
| 1691 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
| 1692 | |
---|
| 1693 | // return free TXT index if found |
---|
| 1694 | if( xlist_is_empty( root_xp ) ) return index; |
---|
| 1695 | } |
---|
| 1696 | |
---|
[492] | 1697 | assert( false , "no free TXT terminal found" ); |
---|
[428] | 1698 | |
---|
| 1699 | return -1; |
---|
| 1700 | |
---|
| 1701 | } // end process_txt_alloc() |
---|
| 1702 | |
---|
| 1703 | ///////////////////////////////////////////// |
---|
| 1704 | void process_txt_attach( process_t * process, |
---|
| 1705 | uint32_t txt_id ) |
---|
| 1706 | { |
---|
| 1707 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
| 1708 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
| 1709 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
| 1710 | xptr_t root_xp; // extended pointer on list root in chdev |
---|
| 1711 | xptr_t lock_xp; // extended pointer on list lock in chdev |
---|
| 1712 | |
---|
[436] | 1713 | // check process is in owner cluster |
---|
[492] | 1714 | assert( (CXY_FROM_PID( process->pid ) == local_cxy) , |
---|
[436] | 1715 | "process descriptor not in owner cluster" ); |
---|
[428] | 1716 | |
---|
| 1717 | // check terminal index |
---|
| 1718 | assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) , |
---|
[492] | 1719 | "illegal TXT terminal index" ); |
---|
[428] | 1720 | |
---|
| 1721 | // get pointers on TXT_RX[txt_id] chdev |
---|
| 1722 | chdev_xp = chdev_dir.txt_rx[txt_id]; |
---|
| 1723 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
| 1724 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
| 1725 | |
---|
| 1726 | // get extended pointer on root & lock of attached process list |
---|
| 1727 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
| 1728 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
| 1729 | |
---|
| 1730 | // insert process in attached process list |
---|
| 1731 | remote_spinlock_lock( lock_xp ); |
---|
| 1732 | xlist_add_last( root_xp , XPTR( local_cxy , &process->txt_list ) ); |
---|
| 1733 | remote_spinlock_unlock( lock_xp ); |
---|
| 1734 | |
---|
[446] | 1735 | #if DEBUG_PROCESS_TXT |
---|
[457] | 1736 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[446] | 1737 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
[457] | 1738 | printk("\n[DBG] %s : thread %x in process %x attached process %x to TXT %d / cycle %d\n", |
---|
| 1739 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, |
---|
| 1740 | process->pid, txt_id , cycle ); |
---|
[433] | 1741 | #endif |
---|
[428] | 1742 | |
---|
| 1743 | } // end process_txt_attach() |
---|
| 1744 | |
---|
[436] | 1745 | ///////////////////////////////////////////// |
---|
| 1746 | void process_txt_detach( xptr_t process_xp ) |
---|
[428] | 1747 | { |
---|
[436] | 1748 | process_t * process_ptr; // local pointer on process in owner cluster |
---|
| 1749 | cxy_t process_cxy; // process owner cluster |
---|
| 1750 | pid_t process_pid; // process identifier |
---|
| 1751 | xptr_t file_xp; // extended pointer on stdin file |
---|
[428] | 1752 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
| 1753 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
| 1754 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
| 1755 | xptr_t lock_xp; // extended pointer on list lock in chdev |
---|
| 1756 | |
---|
[436] | 1757 | // get process cluster, local pointer, and PID |
---|
| 1758 | process_cxy = GET_CXY( process_xp ); |
---|
| 1759 | process_ptr = GET_PTR( process_xp ); |
---|
| 1760 | |
---|
| 1761 | // check process descriptor in owner cluster |
---|
[457] | 1762 | process_pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
[492] | 1763 | assert( (CXY_FROM_PID( process_pid ) == process_cxy ) , |
---|
[436] | 1764 | "process descriptor not in owner cluster" ); |
---|
| 1765 | |
---|
| 1766 | // release TXT ownership (does nothing if not TXT owner) |
---|
| 1767 | process_txt_transfer_ownership( process_xp ); |
---|
[428] | 1768 | |
---|
[436] | 1769 | // get extended pointer on process stdin file |
---|
| 1770 | file_xp = (xptr_t)hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
| 1771 | |
---|
| 1772 | // get pointers on TXT_RX chdev |
---|
| 1773 | chdev_xp = chdev_from_file( file_xp ); |
---|
[428] | 1774 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
| 1775 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
| 1776 | |
---|
[436] | 1777 | // get extended pointer on lock protecting attached process list |
---|
[428] | 1778 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
| 1779 | |
---|
| 1780 | // unlink process from attached process list |
---|
| 1781 | remote_spinlock_lock( lock_xp ); |
---|
[436] | 1782 | xlist_unlink( XPTR( process_cxy , &process_ptr->txt_list ) ); |
---|
[428] | 1783 | remote_spinlock_unlock( lock_xp ); |
---|
[436] | 1784 | |
---|
[446] | 1785 | #if DEBUG_PROCESS_TXT |
---|
[457] | 1786 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[441] | 1787 | uint32_t txt_id = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->channel ) ); |
---|
[446] | 1788 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
[457] | 1789 | printk("\n[DBG] %s : thread %x in process %x detached process %x from TXT %d / cycle %d\n", |
---|
| 1790 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, |
---|
| 1791 | process_pid, txt_id, cycle ); |
---|
[433] | 1792 | #endif |
---|
[428] | 1793 | |
---|
| 1794 | } // end process_txt_detach() |
---|
| 1795 | |
---|
| 1796 | /////////////////////////////////////////////////// |
---|
| 1797 | void process_txt_set_ownership( xptr_t process_xp ) |
---|
| 1798 | { |
---|
| 1799 | process_t * process_ptr; |
---|
| 1800 | cxy_t process_cxy; |
---|
[436] | 1801 | pid_t process_pid; |
---|
[428] | 1802 | xptr_t file_xp; |
---|
| 1803 | xptr_t txt_xp; |
---|
| 1804 | chdev_t * txt_ptr; |
---|
| 1805 | cxy_t txt_cxy; |
---|
| 1806 | |
---|
[436] | 1807 | // get pointers on process in owner cluster |
---|
[428] | 1808 | process_cxy = GET_CXY( process_xp ); |
---|
[435] | 1809 | process_ptr = GET_PTR( process_xp ); |
---|
[436] | 1810 | process_pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
| 1811 | |
---|
| 1812 | // check owner cluster |
---|
[492] | 1813 | assert( (process_cxy == CXY_FROM_PID( process_pid )) , |
---|
[436] | 1814 | "process descriptor not in owner cluster\n" ); |
---|
| 1815 | |
---|
[428] | 1816 | // get extended pointer on stdin pseudo file |
---|
| 1817 | file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
| 1818 | |
---|
| 1819 | // get pointers on TXT chdev |
---|
| 1820 | txt_xp = chdev_from_file( file_xp ); |
---|
| 1821 | txt_cxy = GET_CXY( txt_xp ); |
---|
[435] | 1822 | txt_ptr = GET_PTR( txt_xp ); |
---|
[428] | 1823 | |
---|
| 1824 | // set owner field in TXT chdev |
---|
| 1825 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp ); |
---|
| 1826 | |
---|
[446] | 1827 | #if DEBUG_PROCESS_TXT |
---|
[457] | 1828 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
| 1829 | uint32_t txt_id = hal_remote_lw( XPTR( txt_cxy , &txt_ptr->channel ) ); |
---|
[446] | 1830 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
[457] | 1831 | printk("\n[DBG] %s : thread %x in process %x give TXT %d to process %x / cycle %d\n", |
---|
| 1832 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, txt_id, process_pid, cycle ); |
---|
[436] | 1833 | #endif |
---|
| 1834 | |
---|
[428] | 1835 | } // end process_txt_set ownership() |
---|
| 1836 | |
---|
[436] | 1837 | //////////////////////////////////////////////////////// |
---|
| 1838 | void process_txt_transfer_ownership( xptr_t process_xp ) |
---|
[428] | 1839 | { |
---|
[436] | 1840 | process_t * process_ptr; // local pointer on process releasing ownership |
---|
| 1841 | cxy_t process_cxy; // process cluster |
---|
| 1842 | pid_t process_pid; // process identifier |
---|
[428] | 1843 | xptr_t file_xp; // extended pointer on TXT_RX pseudo file |
---|
| 1844 | xptr_t txt_xp; // extended pointer on TXT_RX chdev |
---|
[433] | 1845 | chdev_t * txt_ptr; // local pointer on TXT_RX chdev |
---|
| 1846 | cxy_t txt_cxy; // cluster of TXT_RX chdev |
---|
| 1847 | uint32_t txt_id; // TXT_RX channel |
---|
[428] | 1848 | xptr_t owner_xp; // extended pointer on current TXT_RX owner |
---|
| 1849 | xptr_t root_xp; // extended pointer on root of attached process list |
---|
[436] | 1850 | xptr_t lock_xp; // extended pointer on lock protecting attached process list |
---|
[428] | 1851 | xptr_t iter_xp; // iterator for xlist |
---|
| 1852 | xptr_t current_xp; // extended pointer on current process |
---|
[433] | 1853 | process_t * current_ptr; // local pointer on current process |
---|
| 1854 | cxy_t current_cxy; // cluster for current process |
---|
[428] | 1855 | |
---|
[457] | 1856 | #if DEBUG_PROCESS_TXT |
---|
| 1857 | uint32_t cycle; |
---|
| 1858 | #endif |
---|
| 1859 | |
---|
[436] | 1860 | // get pointers on process in owner cluster |
---|
[428] | 1861 | process_cxy = GET_CXY( process_xp ); |
---|
[435] | 1862 | process_ptr = GET_PTR( process_xp ); |
---|
[436] | 1863 | process_pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
| 1864 | |
---|
| 1865 | // check owner cluster |
---|
[492] | 1866 | assert( (process_cxy == CXY_FROM_PID( process_pid )) , |
---|
[436] | 1867 | "process descriptor not in owner cluster\n" ); |
---|
| 1868 | |
---|
[428] | 1869 | // get extended pointer on stdin pseudo file |
---|
| 1870 | file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
| 1871 | |
---|
| 1872 | // get pointers on TXT chdev |
---|
| 1873 | txt_xp = chdev_from_file( file_xp ); |
---|
| 1874 | txt_cxy = GET_CXY( txt_xp ); |
---|
[433] | 1875 | txt_ptr = GET_PTR( txt_xp ); |
---|
[428] | 1876 | |
---|
[433] | 1877 | // get extended pointer on TXT_RX owner and TXT channel |
---|
[428] | 1878 | owner_xp = hal_remote_lwd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) ); |
---|
[433] | 1879 | txt_id = hal_remote_lw ( XPTR( txt_cxy , &txt_ptr->channel ) ); |
---|
[428] | 1880 | |
---|
[436] | 1881 | // transfer ownership only if process is the TXT owner |
---|
| 1882 | if( (owner_xp == process_xp) && (txt_id > 0) ) |
---|
[428] | 1883 | { |
---|
[436] | 1884 | // get extended pointers on root and lock of attached processes list |
---|
| 1885 | root_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.root ); |
---|
| 1886 | lock_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.lock ); |
---|
[428] | 1887 | |
---|
[436] | 1888 | // get lock |
---|
| 1889 | remote_spinlock_lock( lock_xp ); |
---|
| 1890 | |
---|
| 1891 | if( process_get_ppid( process_xp ) != 1 ) // process is not KSH |
---|
[428] | 1892 | { |
---|
[436] | 1893 | // scan attached process list to find KSH process |
---|
| 1894 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
| 1895 | { |
---|
| 1896 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
| 1897 | current_cxy = GET_CXY( current_xp ); |
---|
| 1898 | current_ptr = GET_PTR( current_xp ); |
---|
[435] | 1899 | |
---|
[436] | 1900 | if( process_get_ppid( current_xp ) == 1 ) // current is KSH |
---|
| 1901 | { |
---|
| 1902 | // release lock |
---|
| 1903 | remote_spinlock_unlock( lock_xp ); |
---|
| 1904 | |
---|
| 1905 | // set owner field in TXT chdev |
---|
| 1906 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp ); |
---|
| 1907 | |
---|
[446] | 1908 | #if DEBUG_PROCESS_TXT |
---|
[457] | 1909 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 1910 | uint32_t ksh_pid = hal_remote_lw( XPTR( current_cxy , ¤t_ptr->pid ) ); |
---|
[446] | 1911 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
[457] | 1912 | printk("\n[DBG] %s : thread %x in process %x release TXT %d to KSH %x / cycle %d\n", |
---|
| 1913 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, txt_id, ksh_pid, cycle ); |
---|
| 1914 | process_txt_display( txt_id ); |
---|
[436] | 1915 | #endif |
---|
| 1916 | return; |
---|
| 1917 | } |
---|
| 1918 | } |
---|
| 1919 | |
---|
| 1920 | // release lock |
---|
| 1921 | remote_spinlock_unlock( lock_xp ); |
---|
| 1922 | |
---|
| 1923 | // PANIC if KSH not found |
---|
[492] | 1924 | assert( false , "KSH process not found for TXT %d" ); |
---|
[436] | 1925 | |
---|
| 1926 | return; |
---|
| 1927 | } |
---|
| 1928 | else // process is KSH |
---|
| 1929 | { |
---|
| 1930 | // scan attached process list to find another process |
---|
| 1931 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
[428] | 1932 | { |
---|
[436] | 1933 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
| 1934 | current_cxy = GET_CXY( current_xp ); |
---|
| 1935 | current_ptr = GET_PTR( current_xp ); |
---|
| 1936 | |
---|
| 1937 | if( current_xp != process_xp ) // current is not KSH |
---|
| 1938 | { |
---|
| 1939 | // release lock |
---|
| 1940 | remote_spinlock_unlock( lock_xp ); |
---|
| 1941 | |
---|
| 1942 | // set owner field in TXT chdev |
---|
| 1943 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp ); |
---|
| 1944 | |
---|
[446] | 1945 | #if DEBUG_PROCESS_TXT |
---|
[457] | 1946 | cycle = (uint32_t)hal_get_cycles(); |
---|
| 1947 | uint32_t new_pid = hal_remote_lw( XPTR( current_cxy , ¤t_ptr->pid ) ); |
---|
[446] | 1948 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
[457] | 1949 | printk("\n[DBG] %s : thread %x in process %x release TXT %d to process %x / cycle %d\n", |
---|
| 1950 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, txt_id, new_pid, cycle ); |
---|
| 1951 | process_txt_display( txt_id ); |
---|
[436] | 1952 | #endif |
---|
| 1953 | return; |
---|
| 1954 | } |
---|
[428] | 1955 | } |
---|
[436] | 1956 | |
---|
| 1957 | // release lock |
---|
| 1958 | remote_spinlock_unlock( lock_xp ); |
---|
| 1959 | |
---|
| 1960 | // no more owner for TXT if no other process found |
---|
| 1961 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , XPTR_NULL ); |
---|
| 1962 | |
---|
[446] | 1963 | #if DEBUG_PROCESS_TXT |
---|
[436] | 1964 | cycle = (uint32_t)hal_get_cycles(); |
---|
[446] | 1965 | if( DEBUG_PROCESS_TXT < cycle ) |
---|
[457] | 1966 | printk("\n[DBG] %s : thread %x in process %x release TXT %d to nobody / cycle %d\n", |
---|
| 1967 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, txt_id, cycle ); |
---|
| 1968 | process_txt_display( txt_id ); |
---|
[436] | 1969 | #endif |
---|
| 1970 | return; |
---|
[428] | 1971 | } |
---|
[436] | 1972 | } |
---|
| 1973 | else |
---|
| 1974 | { |
---|
[433] | 1975 | |
---|
[446] | 1976 | #if DEBUG_PROCESS_TXT |
---|
[436] | 1977 | cycle = (uint32_t)hal_get_cycles(); |
---|
[446] | 1978 | if( DEBUG_PROCESS_TXT < cycle ) |
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[457] | 1979 | printk("\n[DBG] %s : thread %x in process %d does nothing (not TXT owner) / cycle %d\n", |
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| 1980 | __FUNCTION__, CURRENT_THREAD->trdid, process_pid, cycle ); |
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| 1981 | process_txt_display( txt_id ); |
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[436] | 1982 | #endif |
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| 1983 | |
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[428] | 1984 | } |
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[436] | 1985 | } // end process_txt_transfer_ownership() |
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[428] | 1986 | |
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| 1987 | |
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[457] | 1988 | ////////////////////////////////////////////////// |
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| 1989 | uint32_t process_txt_is_owner( xptr_t process_xp ) |
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| 1990 | { |
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| 1991 | // get local pointer and cluster of process in owner cluster |
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| 1992 | cxy_t process_cxy = GET_CXY( process_xp ); |
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| 1993 | process_t * process_ptr = GET_PTR( process_xp ); |
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| 1994 | |
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| 1995 | // check owner cluster |
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| 1996 | pid_t process_pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
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[492] | 1997 | assert( (process_cxy == CXY_FROM_PID( process_pid )) , |
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[457] | 1998 | "process descriptor not in owner cluster\n" ); |
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| 1999 | |
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| 2000 | // get extended pointer on stdin pseudo file |
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| 2001 | xptr_t file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
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| 2002 | |
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| 2003 | // get pointers on TXT chdev |
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| 2004 | xptr_t txt_xp = chdev_from_file( file_xp ); |
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| 2005 | cxy_t txt_cxy = GET_CXY( txt_xp ); |
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| 2006 | chdev_t * txt_ptr = GET_PTR( txt_xp ); |
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| 2007 | |
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| 2008 | // get extended pointer on TXT_RX owner process |
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| 2009 | xptr_t owner_xp = hal_remote_lwd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) ); |
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| 2010 | |
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| 2011 | return (process_xp == owner_xp); |
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| 2012 | |
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| 2013 | } // end process_txt_is_owner() |
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| 2014 | |
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[436] | 2015 | //////////////////////////////////////////////// |
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| 2016 | xptr_t process_txt_get_owner( uint32_t channel ) |
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[435] | 2017 | { |
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| 2018 | xptr_t txt_rx_xp = chdev_dir.txt_rx[channel]; |
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| 2019 | cxy_t txt_rx_cxy = GET_CXY( txt_rx_xp ); |
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| 2020 | chdev_t * txt_rx_ptr = GET_PTR( txt_rx_xp ); |
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| 2021 | |
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[436] | 2022 | return (xptr_t)hal_remote_lwd( XPTR( txt_rx_cxy , &txt_rx_ptr->ext.txt.owner_xp ) ); |
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[435] | 2023 | |
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[457] | 2024 | } // end process_txt_get_owner() |
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| 2025 | |
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[435] | 2026 | /////////////////////////////////////////// |
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| 2027 | void process_txt_display( uint32_t txt_id ) |
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| 2028 | { |
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| 2029 | xptr_t chdev_xp; |
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| 2030 | cxy_t chdev_cxy; |
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| 2031 | chdev_t * chdev_ptr; |
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| 2032 | xptr_t root_xp; |
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| 2033 | xptr_t lock_xp; |
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| 2034 | xptr_t current_xp; |
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| 2035 | xptr_t iter_xp; |
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[443] | 2036 | cxy_t txt0_cxy; |
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| 2037 | chdev_t * txt0_ptr; |
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| 2038 | xptr_t txt0_xp; |
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| 2039 | xptr_t txt0_lock_xp; |
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| 2040 | reg_t txt0_save_sr; // save SR to take TXT0 lock in busy mode |
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| 2041 | |
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[435] | 2042 | assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) , |
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[492] | 2043 | "illegal TXT terminal index" ); |
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[435] | 2044 | |
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[443] | 2045 | // get pointers on TXT0 chdev |
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| 2046 | txt0_xp = chdev_dir.txt_tx[0]; |
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| 2047 | txt0_cxy = GET_CXY( txt0_xp ); |
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| 2048 | txt0_ptr = GET_PTR( txt0_xp ); |
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| 2049 | |
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| 2050 | // get extended pointer on TXT0 lock |
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| 2051 | txt0_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
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| 2052 | |
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[435] | 2053 | // get pointers on TXT_RX[txt_id] chdev |
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| 2054 | chdev_xp = chdev_dir.txt_rx[txt_id]; |
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| 2055 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 2056 | chdev_ptr = GET_PTR( chdev_xp ); |
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| 2057 | |
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| 2058 | // get extended pointer on root & lock of attached process list |
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| 2059 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
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| 2060 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
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| 2061 | |
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[443] | 2062 | // get lock on attached process list |
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| 2063 | remote_spinlock_lock( lock_xp ); |
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| 2064 | |
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| 2065 | // get TXT0 lock in busy waiting mode |
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| 2066 | remote_spinlock_lock_busy( txt0_lock_xp , &txt0_save_sr ); |
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| 2067 | |
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[435] | 2068 | // display header |
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[443] | 2069 | nolock_printk("\n***** processes attached to TXT_%d / cycle %d\n", |
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| 2070 | txt_id , (uint32_t)hal_get_cycles() ); |
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[435] | 2071 | |
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[436] | 2072 | // scan attached process list |
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[435] | 2073 | XLIST_FOREACH( root_xp , iter_xp ) |
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| 2074 | { |
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| 2075 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
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| 2076 | process_display( current_xp ); |
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| 2077 | } |
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| 2078 | |
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[443] | 2079 | // release TXT0 lock in busy waiting mode |
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| 2080 | remote_spinlock_unlock_busy( txt0_lock_xp , txt0_save_sr ); |
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| 2081 | |
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| 2082 | // release lock on attached process list |
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[435] | 2083 | remote_spinlock_unlock( lock_xp ); |
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| 2084 | |
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| 2085 | } // end process_txt_display |
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