4 * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
5 * This file is part of DevLib - See README.devlib for information.
8 * \brief Monitor to check for stack overflows
12 * \author Giovanni Bajo <rasky@develer.com>
17 *#* Revision 1.7 2006/03/13 02:07:14 bernie
20 *#* Revision 1.6 2006/02/24 01:17:05 bernie
21 *#* Update for new emulator.
23 *#* Revision 1.5 2005/11/04 16:20:02 bernie
24 *#* Fix reference to README.devlib in header.
26 *#* Revision 1.4 2005/04/11 19:10:28 bernie
27 *#* Include top-level headers from cfg/ subdir.
29 *#* Revision 1.3 2004/11/28 23:20:25 bernie
30 *#* Remove obsolete INITLIST macro.
32 *#* Revision 1.2 2004/10/26 09:01:15 bernie
33 *#* monitor_rename(): New function.
35 *#* Revision 1.1 2004/10/03 20:39:03 bernie
38 *#* Revision 1.2 2004/10/03 20:36:43 bernie
39 *#* Use debug.h instead of drv/kdebug.h; Misc spacing/header fixes.
41 *#* Revision 1.1 2004/09/30 23:19:30 rasky
42 *#* Estratto il monitor degli stack da proc.c in due file a parte: monitor.c/h
43 *#* Rinominata monitor_debug_stacks in monitor_report
48 #if CONFIG_KERN_MONITOR
51 #include <mware/list.h>
52 #include <drv/timer.h>
53 #include <kern/proc.h>
54 #include <cfg/macros.h>
55 #include <cfg/debug.h>
58 static List MonitorProcs;
61 void monitor_init(void)
63 LIST_INIT(&MonitorProcs);
67 void monitor_add(Process* proc, const char* name, cpustack_t* stack_base, size_t stack_size)
69 proc->monitor.name = name;
70 proc->monitor.stack_base = stack_base;
71 proc->monitor.stack_size = stack_size;
73 ADDTAIL(&MonitorProcs, &proc->monitor.link);
77 void monitor_remove(Process* proc)
79 REMOVE(&proc->monitor.link);
82 void monitor_rename(Process *proc, const char* name)
84 proc->monitor.name = name;
87 /* TODO: use containerof() */
88 #define MONITOR_NODE_TO_PROCESS(node) \
89 (struct Process *)((char *)(node) - offsetof(struct Process, monitor.link))
91 size_t monitor_checkStack(cpustack_t* stack_base, size_t stack_size)
99 end = stack_base + stack_size / sizeof(cpustack_t) - 1;
101 if (CPU_STACK_GROWS_UPWARD)
111 if (*cur != CONFIG_KERN_STACKFILLCODE)
114 if (CPU_STACK_GROWS_UPWARD)
120 sp_free = ABS(cur - beg) * sizeof(cpustack_t);
125 void monitor_report(void)
130 if (LIST_EMPTY(&MonitorProcs))
132 kputs("No stacks registered in the monitor\n");
136 kprintf("%-24s%-8s%-8s%-8s%-8s\n", "Process name", "TCB", "SPbase", "SPsize", "SPfree");
141 for (p = MONITOR_NODE_TO_PROCESS(LIST_HEAD(&MonitorProcs));
142 p->monitor.link.succ;
143 p = MONITOR_NODE_TO_PROCESS(p->monitor.link.succ))
145 size_t free = monitor_checkStack(p->monitor.stack_base, p->monitor.stack_size);
146 kprintf("%-24s%8p%8p%8lx%8lx\n",
147 p->monitor.name, p, p->monitor.stack_base, p->monitor.stack_size, free);
152 static void NORETURN monitor(void)
158 for (p = MONITOR_NODE_TO_PROCESS(LIST_HEAD(&MonitorProcs));
159 p->monitor.link.succ;
160 p = MONITOR_NODE_TO_PROCESS(p->monitor.link.succ))
162 size_t free = monitor_checkStack(p->monitor.stack_base, p->monitor.stack_size);
166 kprintf("MONITOR: ***************************************\n");
167 kprintf("MONITOR: WARNING: Free stack for process '%s' is only %04x chars\n", p->monitor.name, free);
168 kprintf("MONITOR: ***************************************\n\n");
177 void monitor_start(size_t stacksize, cpustack_t *stack)
179 proc_new(monitor, NULL, stacksize, stack);
182 #endif /* CONFIG_KERN_MONITOR */