4 * This file is part of BeRTOS.
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
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18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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21 * library without restriction. Specifically, if other files instantiate
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24 * file does not by itself cause the resulting executable to 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 <cfg/macros.h>
46 #include <cfg/debug.h>
48 #include <struct/list.h>
50 #include <drv/timer.h>
52 #include <kern/proc.h>
54 #include <cpu/frame.h> /* CPU_STACK_GROWS_UPWARD */
56 /* Access to this list must be protected against the scheduler */
57 static List MonitorProcs;
59 void monitor_init(void)
61 LIST_INIT(&MonitorProcs);
65 void monitor_add(Process *proc, const char *name)
67 proc->monitor.name = name;
69 PROC_ATOMIC(ADDTAIL(&MonitorProcs, &proc->monitor.link));
73 void monitor_remove(Process *proc)
75 PROC_ATOMIC(REMOVE(&proc->monitor.link));
78 void monitor_rename(Process *proc, const char *name)
80 proc->monitor.name = name;
83 size_t monitor_checkStack(cpu_stack_t *stack_base, size_t stack_size)
93 end = stack_base + stack_size / sizeof(cpu_stack_t);
96 if (CPU_STACK_GROWS_UPWARD)
105 if (*cur != CONFIG_KERN_STACKFILLCODE)
111 sp_free = ABS(cur - beg) * sizeof(cpu_stack_t);
116 void monitor_report(void)
121 kprintf("%-9s%-9s%-9s%-9s%s\n", "TCB", "SPbase", "SPsize", "SPfree", "Name");
122 for (i = 0; i < 56; i++)
127 FOREACH_NODE(node, &MonitorProcs)
129 Process *p = containerof(node, Process, monitor.link);
130 size_t free = monitor_checkStack(p->stack_base, p->stack_size);
131 kprintf("%-9p%-9p%-9zu%-9zu%s\n",
132 p, p->stack_base, p->stack_size, free, p->monitor.name);
138 static void NORETURN monitor(void)
145 FOREACH_NODE(node, &MonitorProcs)
147 Process *p = containerof(node, Process, monitor.link);
148 size_t free = monitor_checkStack(p->stack_base, p->stack_size);
151 kprintf("MONITOR: Free stack of process '%s' is only %u chars\n",
152 p->monitor.name, (unsigned int)free);
156 /* Give some rest to the system */
161 void monitor_start(size_t stacksize, cpu_stack_t *stack)
163 struct Process *p = proc_new(monitor, NULL, stacksize, stack);
167 #endif /* CONFIG_KERN_MONITOR */