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
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
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29 * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
33 * \brief Monitor to check for stack overflows
37 * \author Giovanni Bajo <rasky@develer.com>
43 #if CONFIG_KERN_MONITOR
46 #include <mware/list.h>
47 #include <drv/timer.h>
48 #include <kern/proc.h>
49 #include <cfg/macros.h>
50 #include <cfg/debug.h>
53 static List MonitorProcs;
56 void monitor_init(void)
58 LIST_INIT(&MonitorProcs);
62 void monitor_add(Process* proc, const char* name, cpustack_t* stack_base, size_t stack_size)
64 proc->monitor.name = name;
65 proc->monitor.stack_base = stack_base;
66 proc->monitor.stack_size = stack_size;
68 ADDTAIL(&MonitorProcs, &proc->monitor.link);
72 void monitor_remove(Process* proc)
74 REMOVE(&proc->monitor.link);
77 void monitor_rename(Process *proc, const char* name)
79 proc->monitor.name = name;
82 /* TODO: use containerof() */
83 #define MONITOR_NODE_TO_PROCESS(node) \
84 (struct Process *)((intptr_t)(node) - offsetof(struct Process, monitor.link))
86 size_t monitor_checkStack(cpustack_t* stack_base, size_t stack_size)
94 end = stack_base + stack_size / sizeof(cpustack_t) - 1;
96 if (CPU_STACK_GROWS_UPWARD)
106 if (*cur != CONFIG_KERN_STACKFILLCODE)
109 if (CPU_STACK_GROWS_UPWARD)
115 sp_free = ABS(cur - beg) * sizeof(cpustack_t);
120 void monitor_report(void)
125 if (LIST_EMPTY(&MonitorProcs))
127 kputs("No stacks registered in the monitor\n");
131 kprintf("%-24s%-8s%-8s%-8s%-8s\n", "Process name", "TCB", "SPbase", "SPsize", "SPfree");
136 for (p = MONITOR_NODE_TO_PROCESS(LIST_HEAD(&MonitorProcs));
137 p->monitor.link.succ;
138 p = MONITOR_NODE_TO_PROCESS(p->monitor.link.succ))
140 size_t free = monitor_checkStack(p->monitor.stack_base, p->monitor.stack_size);
141 kprintf("%-24s%8p%8p%8zx%8zx\n",
142 p->monitor.name, p, p->monitor.stack_base, p->monitor.stack_size, free);
147 static void NORETURN monitor(void)
153 for (p = MONITOR_NODE_TO_PROCESS(LIST_HEAD(&MonitorProcs));
154 p->monitor.link.succ;
155 p = MONITOR_NODE_TO_PROCESS(p->monitor.link.succ))
157 size_t free = monitor_checkStack(p->monitor.stack_base, p->monitor.stack_size);
160 kprintf("MONITOR: WARNING: Free stack for process '%s' is only %x chars\n",
161 p->monitor.name, (unsigned int)free);
169 void monitor_start(size_t stacksize, cpustack_t *stack)
171 proc_new(monitor, NULL, stacksize, stack);
174 #endif /* CONFIG_KERN_MONITOR */