source: rtems/c/src/exec/posix/src/psignal.c @ 72d42737

4.104.114.84.95
Last change on this file since 72d42737 was 72d42737, checked in by Joel Sherrill <joel.sherrill@…>, on 04/08/02 at 18:27:37

2002-04-06 Ralf Corsepius <corsepiu@…>

  • src/psignal.c: Include <stdlib.h>.
  • Property mode set to 100644
File size: 5.9 KB
Line 
1/*
2 *  $Id$
3 */
4
5#if HAVE_CONFIG_H
6#include "config.h"
7#endif
8
9#include <assert.h>
10#include <errno.h>
11#include <pthread.h>
12#include <signal.h>
13#include <string.h>     /* memcpy */
14#include <stdlib.h>     /* exit */
15
16#include <rtems/system.h>
17#include <rtems/score/isr.h>
18#include <rtems/score/thread.h>
19#include <rtems/score/tqdata.h>
20#include <rtems/score/wkspace.h>
21#include <rtems/seterr.h>
22#include <rtems/posix/threadsup.h>
23#include <rtems/posix/psignal.h>
24#include <rtems/posix/pthread.h>
25#include <rtems/posix/time.h>
26#include <stdio.h>
27
28
29/*
30 *  Currently 32 signals numbered 1-32 are defined
31 */
32
33#define SIGNAL_EMPTY_MASK  0x00000000
34#define SIGNAL_ALL_MASK    0xffffffff
35
36#define signo_to_mask( _sig ) (1 << ((_sig) - 1))
37
38#define is_valid_signo( _sig ) \
39  ((_sig) >= 1 && (_sig) <= 32 )
40
41/*** PROCESS WIDE STUFF ****/
42
43sigset_t  _POSIX_signals_Pending;
44
45void _POSIX_signals_Abnormal_termination_handler( int signo )
46{
47  exit( 1 );
48}
49
50#define SIG_ARRAY_MAX  (SIGRTMAX + 1)
51struct sigaction _POSIX_signals_Default_vectors[ SIG_ARRAY_MAX ] = {
52  /* NO SIGNAL 0 */  SIGACTION_IGNORE,
53  /* SIGHUP    1 */  SIGACTION_TERMINATE,
54  /* SIGINT    2 */  SIGACTION_TERMINATE,
55  /* SIGQUIT   3 */  SIGACTION_TERMINATE,
56  /* SIGILL    4 */  SIGACTION_TERMINATE,
57  /* SIGTRAP   5 */  SIGACTION_TERMINATE,
58  /* SIGIOT    6 */  SIGACTION_TERMINATE,
59  /* SIGABRT   6     SIGACTION_TERMINATE, -- alias for SIGIOT */
60  /* SIGEMT    7 */  SIGACTION_TERMINATE,
61  /* SIGFPE    8 */  SIGACTION_TERMINATE,
62  /* SIGKILL   9 */  SIGACTION_TERMINATE,
63  /* SIGBUS   10 */  SIGACTION_TERMINATE,
64  /* SIGSEGV  11 */  SIGACTION_TERMINATE,
65  /* SIGSYS   12 */  SIGACTION_TERMINATE,
66  /* SIGPIPE  13 */  SIGACTION_TERMINATE,
67  /* SIGALRM  14 */  SIGACTION_TERMINATE,
68  /* SIGTERM  15 */  SIGACTION_TERMINATE,
69  /* SIGUSR1  16 */  SIGACTION_TERMINATE,
70  /* SIGUSR2  17 */  SIGACTION_TERMINATE,
71  /* SIGRTMIN 18 */  SIGACTION_TERMINATE,
72  /* SIGRT    19 */  SIGACTION_TERMINATE,
73  /* SIGRT    20 */  SIGACTION_TERMINATE,
74  /* SIGRT    21 */  SIGACTION_TERMINATE,
75  /* SIGRT    22 */  SIGACTION_TERMINATE,
76  /* SIGRT    23 */  SIGACTION_TERMINATE,
77  /* SIGRT    24 */  SIGACTION_TERMINATE,
78  /* SIGRT    25 */  SIGACTION_TERMINATE,
79  /* SIGRT    26 */  SIGACTION_TERMINATE,
80  /* SIGRT    27 */  SIGACTION_TERMINATE,
81  /* SIGRT    28 */  SIGACTION_TERMINATE,
82  /* SIGRT    29 */  SIGACTION_TERMINATE,
83  /* SIGRT    30 */  SIGACTION_TERMINATE,
84  /* SIGRT    31 */  SIGACTION_TERMINATE,
85  /* SIGRTMAX 32 */  SIGACTION_TERMINATE
86};
87
88struct sigaction _POSIX_signals_Vectors[ SIG_ARRAY_MAX ];
89
90Watchdog_Control _POSIX_signals_Alarm_timer;
91
92Thread_queue_Control _POSIX_signals_Wait_queue;
93
94Chain_Control _POSIX_signals_Inactive_siginfo;
95Chain_Control _POSIX_signals_Siginfo[ SIG_ARRAY_MAX ];
96
97/*PAGE
98 *
99 *  XXX - move these
100 */
101
102#define _States_Is_interruptible_signal( _states ) \
103  ( ((_states) & \
104    (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL)) == \
105      (STATES_WAITING_FOR_SIGNAL|STATES_INTERRUPTIBLE_BY_SIGNAL))
106
107/*
108 *  _POSIX_signals_Post_switch_extension
109 */
110
111void _POSIX_signals_Post_switch_extension(
112  Thread_Control  *the_thread
113)
114{
115  POSIX_API_Control  *api;
116  int                 signo;
117  ISR_Level           level;
118
119  api = the_thread->API_Extensions[ THREAD_API_POSIX ];
120
121  /*
122   *  If we invoke any user code, there is the possibility that
123   *  a new signal has been posted that we should process so we
124   *  restart the loop if a signal handler was invoked.
125   *
126   *  The first thing done is to check there are any signals to be
127   *  processed at all.  No point in doing this loop otherwise.
128   */
129
130restart:
131  _ISR_Disable( level );
132    if ( !(~api->signals_blocked &
133          (api->signals_pending | _POSIX_signals_Pending)) ) {
134     _ISR_Enable( level );
135     return;
136   }
137  _ISR_Enable( level );
138
139  for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) {
140
141    if ( _POSIX_signals_Check_signal( api, signo, FALSE ) )
142      goto restart;
143
144    if ( _POSIX_signals_Check_signal( api, signo, TRUE ) )
145      goto restart;
146
147  }
148
149/* XXX - add __SIGFIRSTNOTRT or something like that to newlib signal .h */
150
151  for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) {
152
153    if ( _POSIX_signals_Check_signal( api, signo, FALSE ) )
154      goto restart;
155 
156    if ( _POSIX_signals_Check_signal( api, signo, TRUE ) )
157      goto restart;
158
159  }
160
161}
162
163/*PAGE
164 *
165 *  _POSIX_signals_Alarm_TSR
166 */
167 
168void _POSIX_signals_Alarm_TSR(
169  Objects_Id      id,
170  void           *argument
171)
172{
173  int status;
174
175  status = kill( getpid(), SIGALRM );
176  /* XXX can't print from an ISR, should this be fatal? */
177  assert( !status );
178}
179
180/*PAGE
181 *
182 *  _POSIX_signals_Manager_Initialization
183 */
184
185void _POSIX_signals_Manager_Initialization(
186  int  maximum_queued_signals
187)
188{
189  unsigned32 signo;
190
191  /*
192   *  Insure we have the same number of vectors and default vector entries
193   */
194
195  assert(
196   sizeof(_POSIX_signals_Vectors) == sizeof(_POSIX_signals_Default_vectors)
197  );
198
199  memcpy(
200    _POSIX_signals_Vectors,
201    _POSIX_signals_Default_vectors,
202    sizeof( _POSIX_signals_Vectors )
203  );
204 
205  /*
206   *  Initialize the set of pending signals for the entire process
207   */
208
209  sigemptyset( &_POSIX_signals_Pending );
210
211  /*
212   *  Initialize the timer used to implement alarm().
213   */
214
215  _Watchdog_Initialize(
216    &_POSIX_signals_Alarm_timer,
217    _POSIX_signals_Alarm_TSR,
218    0,
219    NULL
220  );
221 
222  /*
223   *  Initialize the queue we use to block for signals
224   */
225 
226  _Thread_queue_Initialize(
227    &_POSIX_signals_Wait_queue,
228    OBJECTS_NO_CLASS,
229    THREAD_QUEUE_DISCIPLINE_PRIORITY,
230    STATES_WAITING_FOR_SIGNAL | STATES_INTERRUPTIBLE_BY_SIGNAL,
231    NULL,
232    EAGAIN
233  );
234
235  /* XXX status codes */
236
237  /*
238   *  Allocate the siginfo pools.
239   */
240
241  for ( signo=1 ; signo<= SIGRTMAX ; signo++ )
242    _Chain_Initialize_empty( &_POSIX_signals_Siginfo[ signo ] );
243
244  _Chain_Initialize(
245    &_POSIX_signals_Inactive_siginfo,
246    _Workspace_Allocate_or_fatal_error(
247      maximum_queued_signals * sizeof( POSIX_signals_Siginfo_node )
248    ),
249    maximum_queued_signals,
250    sizeof( POSIX_signals_Siginfo_node )
251  );
252}
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