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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 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:
* - Trace buffer.
* - Parameters check.
* - Kernel assertions.
* .
* @pre In order to use the debug APIs the @p CH_DBG_ENABLE_TRACE,
* @p CH_DBG_ENABLE_ASSERTS, @p CH_DBG_ENABLE_CHECKS options must
* be enabled in @p chconf.h.
* @{
*/
#include "ch.h"
#if CH_DBG_ENABLE_TRACE || defined(__DOXYGEN__)
/**
* @brief Public trace buffer.
*/
TraceBuffer trace_buffer;
/**
* @brief Trace circular buffer subsystem initialization.
* @note Internal use only.
*/
void trace_init(void) {
trace_buffer.tb_size = TRACE_BUFFER_SIZE;
trace_buffer.tb_ptr = &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
*/
void chDbgTrace(Thread *otp) {
trace_buffer.tb_ptr->cse_wtobjp = otp->p_u.wtobjp;
trace_buffer.tb_ptr->cse_time = chTimeNow();
trace_buffer.tb_ptr->cse_state = otp->p_state;
trace_buffer.tb_ptr->cse_tid = (unsigned)currp >> 6;
if (++trace_buffer.tb_ptr >= &trace_buffer.tb_buffer[TRACE_BUFFER_SIZE])
trace_buffer.tb_ptr = &trace_buffer.tb_buffer[0];
}
#endif /* CH_DBG_ENABLE_TRACE */
#if CH_DBG_ENABLE_ASSERTS || CH_DBG_ENABLE_CHECKS || \
CH_DBG_ENABLE_STACK_CHECK || 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. This variable can be
* set to @p NULL if the halt is caused by a stack overflow.
*/
char *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) {
panic_msg = msg;
chSysHalt();
}
#endif /* CH_DBG_ENABLE_ASSERTS || CH_DBG_ENABLE_CHECKS || CH_DBG_ENABLE_STACK_CHECK */
/** @} */
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