source: trunk/kernel/syscalls/sys_exit.c @ 433

Last change on this file since 433 was 433, checked in by alain, 4 years ago

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1/*
2 * sys_exit.c - Kernel function implementing the "exit" system call.
3 *
4 * Author    Alain Greiner (2016,2017)
5 *
6 * Copyright (c)  UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-MKH is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include <kernel_config.h>
25#include <hal_types.h>
26#include <hal_irqmask.h>
27#include <errno.h>
28#include <thread.h>
29#include <printk.h>
30#include <process.h>
31#include <signal.h>
32#include <cluster.h>
33#include <rpc.h>
34
35///////////////////////////////
36int sys_exit( uint32_t status )
37{
38    reg_t       save_sr;       // required to enable IRQs
39
40    thread_t  * this    = CURRENT_THREAD;
41    process_t * process = this->process;
42    pid_t       pid     = process->pid;
43
44#if CONFIG_DEBUG_SYS_EXIT
45uint64_t    tm_start;
46uint64_t    tm_end;
47tm_start = hal_get_cycles();
48if( CONFIG_DEBUG_SYS_EXIT < tm_start )
49printk("\n[DBG] %s : thread %x enter / process %x / status %x / cycle %d\n",
50__FUNCTION__ , this, pid , status , (uint32_t)tm_start );
51#endif
52
53    // get cluster and pointers on process in owner cluster
54    xptr_t      owner_xp  = cluster_get_owner_process_from_pid( pid );
55    cxy_t       owner_cxy = GET_CXY( owner_xp );
56    process_t * owner_ptr = GET_PTR( owner_xp );
57
58    assert( (owner_xp != XPTR_NULL) , __FUNCTION__ , "owner_xp cannot be NULL\n" );
59
60    // enable IRQs
61    hal_enable_irq( &save_sr );
62
63    // the process_make_kill() function must be executed
64    // by an RPC thread in reference cluster
65    rpc_process_make_kill_client( owner_cxy, owner_ptr, true , status );
66
67    // restore IRQs
68    hal_restore_irq( save_sr );
69
70    hal_fence();
71
72#if CONFIG_DEBUG_SYS_EXIT
73tm_end = hal_get_cycles();
74if( CONFIG_DEBUG_SYS_EXIT < tm_end )
75printk("\n[DBG] %s : thread %x exit / process %x / status %x / cost = %d / cycle %d\n",
76__FUNCTION__, this, pid, status, (uint32_t)(tm_end - tm_start), (uint32_t)tm_end );
77#endif
78
79        return 0;
80
81}  // end sys_exit()
82
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