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Timestamp:
Feb 14, 2018, 3:40:19 PM (6 years ago)
Author:
alain
Message:

blip

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  • trunk/kernel/kern/process.h

    r428 r433  
    44 * Authors  Ghassan Almaless (2008,2009,2010,2011,2012)
    55 *          Mohamed Lamine Karaoui (2015)
    6  *          Alain Greiner (2016,2017)
     6 *          Alain Greiner (2016,2017,2018)
    77 *
    88 * Copyright (c) UPMC Sorbonne Universites
    … …  
    6565
    6666/*********************************************************************************************
    67  * This enum defines the process states for ALMOS_MKH.
    68  ********************************************************************************************/
    69 
    70 enum process_states
    71 {
    72     PROCESS_STATE_RUNNING = 0,           /*! process is executing                           */
    73     PROCESS_STATE_STOPPED = 1,           /*! process has been stopped by a signal           */
    74     PROCESS_STATE_KILLED  = 2,           /*! process has been killed by a signal            */
    75     PROCESS_STATE_EXITED  = 3,           /*! process terminated with an exit                */
    76 };
     67 * The termination state is a 32 bits word:
     68 * - the 8 LSB bits contain the user defined exit status
     69 * - the 24 other bits contain the flags defined below
     70 ********************************************************************************************/
     71
     72#define PROCESS_FLAG_BLOCK 0x100  /*! process received as SIGSTOP signal                    */
     73#define PROCESS_FLAG_KILL  0x200  /*! process terminated by a sys_kill()                    */
     74#define PROCESS_FLAG_EXIT  0x400  /*! process terminated by a sys_exit()                    */
     75#define PROCESS_FLAG_WAIT  0x800  /*! parent process executed successfully a sys_wait()     */
    7776
    7877/*********************************************************************************************
    … …  
    118117 * 6) The <local_list>, <copies_list>, <th_tbl>, <th_nr>, <th_lock> fields
    119118 *    are defined in all process descriptors copies.
     119 * 7) The termination <flags> and <exit_status> are only defined in the reference cluster.
    120120 ********************************************************************************************/
    121121
    … …  
    155155    remote_spinlock_t sync_lock;        /*! lock protecting sem,mutex,barrier,condvar lists */
    156156
    157     uint32_t          state;            /*! RUNNING / STOPPED / KILLED / EXITED             */
     157    uint32_t          term_state;       /*! termination status (flags & exit status)        */
    158158
    159159    bool_t            txt_owner;        /*! current TXT owner                               */
    … …  
    168168typedef struct exec_info_s
    169169{
    170     pid_t              pid;            /*! process identifier (both parent and child)       */
    171 
    172170    char               path[CONFIG_VFS_MAX_PATH_LENGTH];   /*!  .elf file path              */
    173171
    … …  
    276274
    277275/*********************************************************************************************
    278  * This function returns a printable string defining the process state.
    279  *********************************************************************************************
    280  * @ state   : RUNNING / BLOCKED / EXITED / KILLED
    281  * @ return a string pointer.
    282  ********************************************************************************************/
    283 char * process_state_str( uint32_t state );
    284 
    285 /*********************************************************************************************
    286276 * This debug function diplays on the kernel terminal TXT0 detailed informations on a
    287277 * reference process identified by the <process_xp> argument.
    … …  
    324314
    325315/*********************************************************************************************
    326  * This function blocks all threads (but the client thread defined by the <client_xp>
    327  * argument) for a given <process> in a given cluster.
     316 * This function blocks all threads for a given <process> in a given cluster.
     317 * The calling thread cannot be a target thread.
    328318 * It loops on all local threads of the process, set the THREAD_BLOCKED_GLOBAL bit,
    329319 * and request the relevant schedulers to acknowledge the blocking, using IPI if required.
    … …  
    332322 *********************************************************************************************
    333323 * @ process     : pointer on the target process descriptor.
    334  * @ client_xp   : extended pointer on the client thread, that should not be blocked.
    335  ********************************************************************************************/
    336 void process_block_threads( process_t * process,
    337                             xptr_t      client_xp );
     324 ********************************************************************************************/
     325void process_block_threads( process_t * process );
    338326
    339327/*********************************************************************************************
    … …  
    345333
    346334/*********************************************************************************************
    347  * This function delete all threads, (but the client thread defined by the <client_xp>
    348  * argument) for a given <process> in a given cluster.
     335 * This function marks for deletion all threads - but one _ for a given <process>
     336 * in a given cluster. The main thread in owner cluster is NOT marked.
     337 * It will be marked for deletion by the parent process sys_wait().
     338 * The calling thread cannot be a target thread.
    349339 * It loops on all local threads of the process, and set the THREAD_FLAG_REQ_DELETE bit.
    350340 * For each marked thread, the following actions will be done by the scheduler at the next
    … …  
    357347 *********************************************************************************************
    358348 * @ process     : pointer on the process descriptor.
    359  * @ client_xp   : extended pointer on the client thread, that should not be deleted.
    360  ********************************************************************************************/
    361 void process_delete_threads( process_t * process,
    362                              xptr_t      client_xp );
     349 ********************************************************************************************/
     350void process_delete_threads( process_t * process );
    363351
    364352/*********************************************************************************************
    … …  
    396384 * associated "child" thread descriptor in the local cluster. This function can involve
    397385 * up to three different clusters :
    398  * - the local (child) cluster can be any cluster defined by the sys_fork function.
     386 * - the child (local) cluster can be any cluster defined by the sys_fork function.
    399387 * - the parent cluster must be the reference cluster for the parent process.
    400388 * - the client cluster containing the thread requesting the fork can be any cluster.
    … …  
    416404
    417405/*********************************************************************************************
    418  * This function implement the "exit" system call, and is called by the sys_exit() function.
    419  * It must be executed by a thread running in the calling process owner cluster.
    420  * It uses twice the multicast RPC_PROCESS_SIGNAL to first block all process threads
    421  * in all clusters, and then delete all threads and process descriptors.
    422  *********************************************************************************************
    423  * @ pid      : process identifier.
    424  * @ status   : exit return value.
    425  ********************************************************************************************/
    426 void process_make_exit( pid_t       pid,
    427                         uint32_t    status );
    428 
    429 /*********************************************************************************************
    430  * This function implement the "kill" system call, and is called by the sys_kill() function.
    431  * It must be executed by a thread running in the target process owner cluster.
    432  * Only the SIGKILL, SIGSTOP, and SIGCONT signals are supported.
    433  * User defined handlers are not supported.
    434  * It uses once or twice the multicast RPC_PROCESS_SIGNAL to block, unblock or delete
    435  * all process threads in all clusters, and then delete process descriptors.
    436  *********************************************************************************************
    437  * @ pid     : process identifier.
    438  * @ sig_id  : signal type.
    439  ********************************************************************************************/
    440 void process_make_kill( pid_t     pid,
    441                         uint32_t  sig_id );
     406 * This function is called by both the sys_kill() and sys_exit() system calls.
     407 * It must be executed by an RPC thread running in the target process owner cluster.
     408 * It uses twice the process_sigaction() function:
     409 * - first, to block all target process threads, in all clusters.
     410 * - second, to delete all target process threads in all clusters.
     411 * Finally, it synchronizes with the parent process sys_wait() function that MUST be called
     412 * by the parent process main thread.
     413 *********************************************************************************************
     414 * @ process      : pointer on process descriptor in owner cluster.
     415 * @ is_exit      : true when called by sys_exit() / false when called by sys_kill().
     416 * @ exit_status  : exit status, when called by sys_exit().
     417 ********************************************************************************************/
     418void process_make_kill( process_t * process,
     419                        bool_t      is_exit,
     420                        uint32_t    exit_status );
    442421
    443422
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