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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 static List MonitorProcs;
55 void monitor_init(void)
57 LIST_INIT(&MonitorProcs);
61 void monitor_add(Process *proc, const char *name)
63 proc->monitor.name = name;
65 ADDTAIL(&MonitorProcs, &proc->monitor.link);
69 void monitor_remove(Process *proc)
71 REMOVE(&proc->monitor.link);
74 void monitor_rename(Process *proc, const char *name)
76 proc->monitor.name = name;
79 /* TODO: use containerof() */
80 #define MONITOR_NODE_TO_PROCESS(node) \
81 (struct Process *)((intptr_t)(node) - offsetof(struct Process, monitor.link))
83 size_t monitor_checkStack(cpustack_t *stack_base, size_t stack_size)
91 end = stack_base + stack_size / sizeof(cpustack_t) - 1;
93 if (CPU_STACK_GROWS_UPWARD)
103 if (*cur != CONFIG_KERN_STACKFILLCODE)
106 if (CPU_STACK_GROWS_UPWARD)
112 sp_free = ABS(cur - beg) * sizeof(cpustack_t);
117 void monitor_report(void)
122 if (LIST_EMPTY(&MonitorProcs))
124 kputs("No stacks registered in the monitor\n");
128 kprintf("%-24s%-8s%-8s%-8s%-8s\n", "Process name", "TCB", "SPbase", "SPsize", "SPfree");
133 for (p = MONITOR_NODE_TO_PROCESS(LIST_HEAD(&MonitorProcs));
134 p->monitor.link.succ;
135 p = MONITOR_NODE_TO_PROCESS(p->monitor.link.succ))
137 size_t free = monitor_checkStack(p->stack_base, p->stack_size);
138 kprintf("%-24s%-8p%-8p%-8lu%-8lu\n",
139 p->monitor.name, p, p->stack_base, p->stack_size, free);
144 static void NORETURN monitor(void)
150 for (p = MONITOR_NODE_TO_PROCESS(LIST_HEAD(&MonitorProcs));
151 p->monitor.link.succ;
152 p = MONITOR_NODE_TO_PROCESS(p->monitor.link.succ))
154 size_t free = monitor_checkStack(p->stack_base, p->stack_size);
157 kprintf("MONITOR: WARNING: Free stack for process '%s' is only %u chars\n",
158 p->monitor.name, (unsigned int)free);
166 void monitor_start(size_t stacksize, cpustack_t *stack)
168 proc_new(monitor, NULL, stacksize, stack);
171 #endif /* CONFIG_KERN_MONITOR */