4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
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24 * file does not by itself cause the resulting executable to be covered by
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26 * invalidate any other reasons why the executable file might be covered by
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29 * Copyright 2004, 2008 Develer S.r.l. (http://www.develer.com/)
33 * \brief Monitor to check for stack overflows
36 * \author Giovanni Bajo <rasky@develer.com>
42 #if CONFIG_KERN_MONITOR
45 #include <mware/list.h>
46 #include <drv/timer.h>
47 #include <kern/proc.h>
48 #include <cfg/macros.h>
49 #include <cfg/debug.h>
52 /* Access to this list must be protected against the scheduler */
53 static List MonitorProcs;
56 void monitor_init(void)
58 LIST_INIT(&MonitorProcs);
62 void monitor_add(Process *proc, const char *name)
64 proc->monitor.name = name;
66 PROC_ATOMIC(ADDTAIL(&MonitorProcs, &proc->monitor.link));
70 void monitor_remove(Process *proc)
72 PROC_ATOMIC(REMOVE(&proc->monitor.link));
75 void monitor_rename(Process *proc, const char *name)
77 proc->monitor.name = name;
80 size_t monitor_checkStack(cpustack_t *stack_base, size_t stack_size)
88 end = stack_base + stack_size / sizeof(cpustack_t) - 1;
90 if (CPU_STACK_GROWS_UPWARD)
100 if (*cur != CONFIG_KERN_STACKFILLCODE)
103 if (CPU_STACK_GROWS_UPWARD)
109 sp_free = ABS(cur - beg) * sizeof(cpustack_t);
114 void monitor_report(void)
119 kprintf("%-8s%-8s%-8s%-8s %s\n", "TCB", "SPbase", "SPsize", "SPfree", "Name");
120 for (i = 0; i < 56; i++)
125 FOREACH_NODE(node, &MonitorProcs)
127 Process *p = containerof(node, Process, monitor.link);
128 size_t free = monitor_checkStack(p->stack_base, p->stack_size);
129 kprintf("%-8p%-8p%-8lu%-8lu %s\n",
130 p, p->stack_base, p->stack_size, free, p->monitor.name);
136 static void NORETURN monitor(void)
143 FOREACH_NODE(node, &MonitorProcs)
145 Process *p = containerof(node, Process, monitor.link);
146 size_t free = monitor_checkStack(p->stack_base, p->stack_size);
149 kprintf("MONITOR: Free stack of process '%s' is only %u chars\n",
150 p->monitor.name, (unsigned int)free);
154 /* Give some rest to the system */
160 void monitor_start(size_t stacksize, cpustack_t *stack)
162 proc_new(monitor, NULL, stacksize, stack);
165 #endif /* CONFIG_KERN_MONITOR */