source: rtems/cpukit/posix/src/psignal.c @ f5d6c8b

4.115
Last change on this file since f5d6c8b was f5d6c8b, checked in by Sebastian Huber <sebastian.huber@…>, on 04/27/15 at 14:25:52

score: Delete Thread_queue_Control::timeout_status

Use a parameter for _Thread_queue_Enqueue() instead to reduce memory
usage.

  • Property mode set to 100644
File size: 6.0 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief POSIX Signals Manager Initialization
5 *  @ingroup POSIX_SIGNALS
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-2008.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <errno.h>
22#include <signal.h>
23#include <string.h>
24#include <stdlib.h>
25
26#include <rtems/score/isrlevel.h>
27#include <rtems/score/threadimpl.h>
28#include <rtems/score/threadqimpl.h>
29#include <rtems/score/watchdogimpl.h>
30#include <rtems/score/wkspace.h>
31#include <rtems/posix/threadsup.h>
32#include <rtems/posix/psignalimpl.h>
33#include <rtems/posix/pthreadimpl.h>
34#include <rtems/posix/time.h>
35#include <rtems/config.h>
36#include <rtems/seterr.h>
37
38/*
39 *  Ensure we have the same number of vectors and default vector entries
40 */
41RTEMS_STATIC_ASSERT(
42  sizeof( _POSIX_signals_Vectors ) == sizeof( _POSIX_signals_Default_vectors ),
43  posix_signals_vectors
44);
45
46/*** PROCESS WIDE STUFF ****/
47
48sigset_t  _POSIX_signals_Pending;
49
50void _POSIX_signals_Abnormal_termination_handler(
51  int signo __attribute__((unused)) )
52{
53  exit( 1 );
54}
55
56#define SIG_ARRAY_MAX  (SIGRTMAX + 1)
57const struct sigaction _POSIX_signals_Default_vectors[ SIG_ARRAY_MAX ] = {
58  /* NO SIGNAL 0 */  SIGACTION_IGNORE,
59  /* SIGHUP    1 */  SIGACTION_TERMINATE,
60  /* SIGINT    2 */  SIGACTION_TERMINATE,
61  /* SIGQUIT   3 */  SIGACTION_TERMINATE,
62  /* SIGILL    4 */  SIGACTION_TERMINATE,
63  /* SIGTRAP   5 */  SIGACTION_TERMINATE,
64  /* SIGIOT    6 */  SIGACTION_TERMINATE,
65  /* SIGABRT   6     SIGACTION_TERMINATE, -- alias for SIGIOT */
66  /* SIGEMT    7 */  SIGACTION_TERMINATE,
67  /* SIGFPE    8 */  SIGACTION_TERMINATE,
68  /* SIGKILL   9 */  SIGACTION_TERMINATE,
69  /* SIGBUS   10 */  SIGACTION_TERMINATE,
70  /* SIGSEGV  11 */  SIGACTION_TERMINATE,
71  /* SIGSYS   12 */  SIGACTION_TERMINATE,
72  /* SIGPIPE  13 */  SIGACTION_TERMINATE,
73  /* SIGALRM  14 */  SIGACTION_TERMINATE,
74  /* SIGTERM  15 */  SIGACTION_TERMINATE,
75  /* SIGURG   16 */  SIGACTION_TERMINATE,
76  /* SIGSTOP  17 */  SIGACTION_TERMINATE,
77  /* SIGTSTP  18 */  SIGACTION_TERMINATE,
78  /* SIGCONT  19 */  SIGACTION_TERMINATE,
79  /* SIGCHLD  20 */  SIGACTION_TERMINATE,
80  /* SIGTTIN  21 */  SIGACTION_TERMINATE,
81  /* SIGTTOU  22 */  SIGACTION_TERMINATE,
82  /* SIGIO    23 */  SIGACTION_TERMINATE,
83  /* SIGWINCH 24 */  SIGACTION_TERMINATE,
84  /* SIGUSR1  25 */  SIGACTION_TERMINATE,
85  /* SIGUSR2  26 */  SIGACTION_TERMINATE,
86  /* SIGRT    27 */  SIGACTION_TERMINATE,
87  /* SIGRT    28 */  SIGACTION_TERMINATE,
88  /* SIGRT    29 */  SIGACTION_TERMINATE,
89  /* SIGRT    30 */  SIGACTION_TERMINATE,
90  /* SIGRTMAX 31 */  SIGACTION_TERMINATE
91};
92
93struct sigaction _POSIX_signals_Vectors[ SIG_ARRAY_MAX ];
94
95Thread_queue_Control _POSIX_signals_Wait_queue;
96
97Chain_Control _POSIX_signals_Inactive_siginfo;
98Chain_Control _POSIX_signals_Siginfo[ SIG_ARRAY_MAX ];
99
100/*
101 *  XXX - move these
102 */
103
104#define _States_Is_interruptible_signal( _states ) \
105  ( ((_states) & \
106    (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL)) == \
107      (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL))
108
109void _POSIX_signals_Action_handler(
110  Thread_Control  *executing,
111  Thread_Action   *action,
112  Per_CPU_Control *cpu,
113  ISR_Level        level
114)
115{
116  POSIX_API_Control  *api;
117  int                 signo;
118  ISR_lock_Context    lock_context;
119  int                 hold_errno;
120
121  (void) action;
122  _Thread_Action_release_and_ISR_enable( cpu, level );
123
124  api = executing->API_Extensions[ THREAD_API_POSIX ];
125
126  /*
127   *  We need to ensure that if the signal handler executes a call
128   *  which overwrites the unblocking status, we restore it.
129   */
130  hold_errno = executing->Wait.return_code;
131
132  /*
133   * api may be NULL in case of a thread close in progress
134   */
135  if ( !api )
136    return;
137
138  /*
139   *  If we invoke any user code, there is the possibility that
140   *  a new signal has been posted that we should process so we
141   *  restart the loop if a signal handler was invoked.
142   *
143   *  The first thing done is to check there are any signals to be
144   *  processed at all.  No point in doing this loop otherwise.
145   */
146  while (1) {
147    _POSIX_signals_Acquire( &lock_context );
148      if ( !(~api->signals_blocked &
149            (api->signals_pending | _POSIX_signals_Pending)) ) {
150       _POSIX_signals_Release( &lock_context );
151       break;
152     }
153    _POSIX_signals_Release( &lock_context );
154
155    for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) {
156      _POSIX_signals_Check_signal( api, signo, false );
157      _POSIX_signals_Check_signal( api, signo, true );
158    }
159    /* Unfortunately - nothing like __SIGFIRSTNOTRT in newlib signal .h */
160
161    for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) {
162      _POSIX_signals_Check_signal( api, signo, false );
163      _POSIX_signals_Check_signal( api, signo, true );
164    }
165  }
166
167  executing->Wait.return_code = hold_errno;
168}
169
170void _POSIX_signals_Manager_Initialization(void)
171{
172  uint32_t   signo;
173  uint32_t   maximum_queued_signals;
174
175  maximum_queued_signals = Configuration_POSIX_API.maximum_queued_signals;
176
177  memcpy(
178    _POSIX_signals_Vectors,
179    _POSIX_signals_Default_vectors,
180    sizeof( _POSIX_signals_Vectors )
181  );
182
183  /*
184   *  Initialize the set of pending signals for the entire process
185   */
186  sigemptyset( &_POSIX_signals_Pending );
187
188  /*
189   *  Initialize the queue we use to block for signals
190   */
191  _Thread_queue_Initialize(
192    &_POSIX_signals_Wait_queue,
193    THREAD_QUEUE_DISCIPLINE_FIFO
194  );
195
196  /* XXX status codes */
197
198  /*
199   *  Allocate the siginfo pools.
200   */
201  for ( signo=1 ; signo<= SIGRTMAX ; signo++ )
202    _Chain_Initialize_empty( &_POSIX_signals_Siginfo[ signo ] );
203
204  if ( maximum_queued_signals ) {
205    _Chain_Initialize(
206      &_POSIX_signals_Inactive_siginfo,
207      _Workspace_Allocate_or_fatal_error(
208        maximum_queued_signals * sizeof( POSIX_signals_Siginfo_node )
209      ),
210      maximum_queued_signals,
211      sizeof( POSIX_signals_Siginfo_node )
212    );
213  } else {
214    _Chain_Initialize_empty( &_POSIX_signals_Inactive_siginfo );
215  }
216}
Note: See TracBrowser for help on using the repository browser.