Ignore:
Timestamp:
Mar 7, 2018, 9:02:03 AM (4 years ago)
Author:
alain
Message:

1) improve the threads and process destruction mechanism.
2) introduce FIFOs in the soclib_tty driver.

File:
1 edited

Legend:

Unmodified
Added
Removed
  • trunk/kernel/syscalls/sys_exit.c

    r435 r436  
    4141    process_t * process = this->process;
    4242    pid_t       pid     = process->pid;
     43    trdid_t     trdid   = this->trdid;
    4344
    4445#if CONFIG_DEBUG_SYS_EXIT
     
    5556
    5657    // exit must be called by the main thread
    57     if( (owner_cxy != local_cxy) || (LTID_FROM_TRDID( this->trdid ) != 0) )
     58    if( (owner_cxy != local_cxy) || (LTID_FROM_TRDID( trdid ) != 0) )
    5859    {
    5960
    6061#if CONFIG_DEBUG_SYSCALLS_ERROR
    61 printk("\n[ERROR] %s must be called by thread 0 in process owner cluster\n"
    62        "         trdid = %x / pid = %x / local_cxy = %x\n",
    63 __FUNCTION__, this->trdid, pid, local_cxy );
     62printk("\n[ERROR] in %s : calling thread %x is not thread 0 in owner cluster %x\n",
     63__FUNCTION__, trdid, owner_cxy );
    6464#endif
    6565         this->errno = EINVAL;
     
    7373    process->term_state = status;
    7474
    75     // remove TXT ownership from owner process descriptor
    76     process_txt_reset_ownership( XPTR( local_cxy , process ) );
     75#if( CONFIG_DEBUG_SYS_EXIT & 1)
     76printk("\n[DBG] %s : set exit status in process term_state\n", __FUNCTION__);
     77#endif
    7778
    78     // block all process threads in all clusters
    79     process_sigaction( pid , BLOCK_ALL_THREADS );
     79    // remove process from TXT list
     80    process_txt_detach( XPTR( local_cxy , process ) );
    8081
    81     // mark all process threads in all clusters for delete
     82#if( CONFIG_DEBUG_SYS_EXIT & 1)
     83printk("\n[DBG] %s : removed from TXT list\n", __FUNCTION__);
     84#endif
     85
     86    // mark for delete all process threads in all clusters (but the main)
    8287    process_sigaction( pid , DELETE_ALL_THREADS );
     88
     89#if( CONFIG_DEBUG_SYS_EXIT & 1)
     90printk("\n[DBG] %s : deleted all other threads than main\n", __FUNCTION__);
     91#endif
    8392
    8493    // restore IRQs
    8594    hal_restore_irq( save_sr );
    8695
    87     // atomically update owner process descriptor term_state
     96    // block the main thread itself
     97    thread_block( XPTR( local_cxy , this ) , THREAD_BLOCKED_GLOBAL );
     98
     99#if( CONFIG_DEBUG_SYS_EXIT & 1)
     100printk("\n[DBG] %s : blocked the main thread\n", __FUNCTION__);
     101#endif
     102
     103    // atomically update owner process descriptor term_state to ask
     104    // the parent process sys_wait() function to delete this main thread
    88105    hal_remote_atomic_or( XPTR( local_cxy , &process->term_state ) ,
    89106                          PROCESS_TERM_EXIT );
     107
     108#if( CONFIG_DEBUG_SYS_EXIT & 1)
     109printk("\n[DBG] %s : set EXIT flag in process term_state\n", __FUNCTION__);
     110#endif
     111
    90112    hal_fence();
    91113
     
    97119#endif
    98120
     121    // main thread deschedule
     122    sched_yield( "process exit" );
     123
     124    // this code should never be executed
     125    assert( false , __FUNCTION__ , "this code should not be executed...\n" );
    99126        return 0;
    100127
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