1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file chdebug.c
* @brief ChibiOS/RT Debug code.
*
* @addtogroup debug
* @details Debug APIs and services:
* - Runtime system state and call protocol check. The following
* panic messages can be generated:
* - SV#1, misplaced @p chSysDisable().
* - SV#2, misplaced @p chSysSuspend()
* - SV#3, misplaced @p chSysEnable().
* - SV#4, misplaced @p chSysLock().
* - SV#5, misplaced @p chSysUnlock().
* - SV#6, misplaced @p chSysLockFromIsr().
* - SV#7, misplaced @p chSysUnlockFromIsr().
* - SV#8, misplaced @p CH_IRQ_PROLOGUE().
* - SV#9, misplaced @p CH_IRQ_EPILOGUE().
* .
* - Trace buffer.
* - Parameters check.
* - Kernel assertions.
* - Kernel panics.
* .
* @note Stack checks are not implemented in this module but in the port
* layer in an architecture-dependent way.
* @{
*/
#include "ch.h"
/*===========================================================================*/
/* System state checker related code and variables. */
/*===========================================================================*/
#if CH_DBG_SYSTEM_STATE_CHECK || defined(__DOXYGEN__)
/**
* @brief ISR nesting level.
*/
cnt_t dbg_isr_cnt;
/**
* @brief Lock nesting level.
*/
cnt_t dbg_lock_cnt;
/**
* @brief Guard code for @p chSysDisable().
*
* @notapi
*/
void dbg_check_disable(void) {
if ((dbg_isr_cnt != 0) || (dbg_lock_cnt != 0))
chDbgPanic("SV#1");
}
/**
* @brief Guard code for @p chSysSuspend().
*
* @notapi
*/
void dbg_check_suspend(void) {
if ((dbg_isr_cnt != 0) || (dbg_lock_cnt != 0))
chDbgPanic("SV#2");
}
/**
* @brief Guard code for @p chSysEnable().
*
* @notapi
*/
void dbg_check_enable(void) {
if ((dbg_isr_cnt != 0) || (dbg_lock_cnt != 0))
chDbgPanic("SV#3");
}
/**
* @brief Guard code for @p chSysLock().
*
* @notapi
*/
void dbg_check_lock(void) {
if ((dbg_isr_cnt != 0) || (dbg_lock_cnt != 0))
chDbgPanic("SV#4");
dbg_lock_cnt = 1;
}
/**
* @brief Guard code for @p chSysUnlock().
*
* @notapi
*/
void dbg_check_unlock(void) {
if ((dbg_isr_cnt != 0) || (dbg_lock_cnt <= 0))
chDbgPanic("SV#5");
dbg_lock_cnt = 0;
}
/**
* @brief Guard code for @p chSysLockFromIsr().
*
* @notapi
*/
void dbg_check_lock_from_isr(void) {
if ((dbg_isr_cnt <= 0) || (dbg_lock_cnt != 0))
chDbgPanic("SV#6");
dbg_lock_cnt = 1;
}
/**
* @brief Guard code for @p chSysUnlockFromIsr().
*
* @notapi
*/
void dbg_check_unlock_from_isr(void) {
if ((dbg_isr_cnt <= 0) || (dbg_lock_cnt <= 0))
chDbgPanic("SV#7");
dbg_lock_cnt = 0;
}
/**
* @brief Guard code for @p CH_IRQ_PROLOGUE().
*
* @notapi
*/
void dbg_check_enter_isr(void) {
port_lock_from_isr();
if (dbg_isr_cnt < 0)
chDbgPanic("SV#8");
dbg_isr_cnt++;
port_unlock_from_isr();
}
/**
* @brief Guard code for @p CH_IRQ_EPILOGUE().
*
* @notapi
*/
void dbg_check_leave_isr(void) {
port_lock_from_isr();
if (dbg_isr_cnt <= 0)
chDbgPanic("SV#9");
dbg_isr_cnt--;
port_unlock_from_isr();
}
#endif /* CH_DBG_SYSTEM_STATE_CHECK */
/*===========================================================================*/
/* Trace related code and variables. */
/*===========================================================================*/
#if CH_DBG_ENABLE_TRACE || defined(__DOXYGEN__)
/**
* @brief Public trace buffer.
*/
ch_trace_buffer_t dbg_trace_buffer;
/**
* @brief Trace circular buffer subsystem initialization.
* @note Internal use only.
*/
void _trace_init(void) {
dbg_trace_buffer.tb_size = CH_TRACE_BUFFER_SIZE;
dbg_trace_buffer.tb_ptr = &dbg_trace_buffer.tb_buffer[0];
}
/**
* @brief Inserts in the circular debug trace buffer a context switch record.
*
* @param[in] otp the thread being switched out
*
* @notapi
*/
void dbg_trace(Thread *otp) {
dbg_trace_buffer.tb_ptr->se_time = chTimeNow();
dbg_trace_buffer.tb_ptr->se_tp = currp;
dbg_trace_buffer.tb_ptr->se_wtobjp = otp->p_u.wtobjp;
dbg_trace_buffer.tb_ptr->se_state = (uint8_t)otp->p_state;
if (++dbg_trace_buffer.tb_ptr >=
&dbg_trace_buffer.tb_buffer[CH_TRACE_BUFFER_SIZE])
dbg_trace_buffer.tb_ptr = &dbg_trace_buffer.tb_buffer[0];
}
#endif /* CH_DBG_ENABLE_TRACE */
/*===========================================================================*/
/* Panic related code and variables. */
/*===========================================================================*/
#if CH_DBG_ENABLED || defined(__DOXYGEN__)
/**
* @brief Pointer to the panic message.
* @details This pointer is meant to be accessed through the debugger, it is
* written once and then the system is halted.
*/
char *dbg_panic_msg;
/**
* @brief Prints a panic message on the console and then halts the system.
*
* @param[in] msg the pointer to the panic message string
*/
void chDbgPanic(char *msg) {
dbg_panic_msg = msg;
chSysHalt();
}
#endif /* CH_DBG_ENABLED */
/** @} */
|
