* invalidate any other reasons why the executable file might be covered by
* the GNU General Public License.
*
- * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 2004, 2008 Develer S.r.l. (http://www.develer.com/)
*
* -->
*
* \brief Monitor to check for stack overflows
*
- * \version $Id$
- *
* \author Giovanni Bajo <rasky@develer.com>
*/
#if CONFIG_KERN_MONITOR
#include "proc_p.h"
-#include <mware/list.h>
-#include <drv/timer.h>
-#include <kern/proc.h>
#include <cfg/macros.h>
#include <cfg/debug.h>
+#include <struct/list.h>
-static List MonitorProcs;
+#include <drv/timer.h>
+#include <kern/proc.h>
+
+#include <cpu/frame.h> /* CPU_STACK_GROWS_UPWARD */
+
+/* Access to this list must be protected against the scheduler */
+static List MonitorProcs;
void monitor_init(void)
{
}
-void monitor_add(Process* proc, const char* name, cpustack_t* stack_base, size_t stack_size)
+void monitor_add(Process *proc, const char *name)
{
proc->monitor.name = name;
- proc->monitor.stack_base = stack_base;
- proc->monitor.stack_size = stack_size;
- ADDTAIL(&MonitorProcs, &proc->monitor.link);
+ PROC_ATOMIC(ADDTAIL(&MonitorProcs, &proc->monitor.link));
}
-void monitor_remove(Process* proc)
+void monitor_remove(Process *proc)
{
- REMOVE(&proc->monitor.link);
+ PROC_ATOMIC(REMOVE(&proc->monitor.link));
}
-void monitor_rename(Process *proc, const char* name)
+void monitor_rename(Process *proc, const char *name)
{
proc->monitor.name = name;
}
-/* TODO: use containerof() */
-#define MONITOR_NODE_TO_PROCESS(node) \
- (struct Process *)((intptr_t)(node) - offsetof(struct Process, monitor.link))
-
-size_t monitor_checkStack(cpustack_t* stack_base, size_t stack_size)
+size_t monitor_checkStack(cpu_stack_t *stack_base, size_t stack_size)
{
- cpustack_t* beg;
- cpustack_t* cur;
- cpustack_t* end;
+ cpu_stack_t *beg;
+ cpu_stack_t *cur;
+ cpu_stack_t *end;
+ int inc;
size_t sp_free;
+
beg = stack_base;
- end = stack_base + stack_size / sizeof(cpustack_t) - 1;
+ end = stack_base + stack_size / sizeof(cpu_stack_t);
+ inc = +1;
if (CPU_STACK_GROWS_UPWARD)
{
- cur = beg;
- beg = end;
- end = cur;
+ SWAP(beg, end);
+ inc = -1;
}
cur = beg;
if (*cur != CONFIG_KERN_STACKFILLCODE)
break;
- if (CPU_STACK_GROWS_UPWARD)
- cur--;
- else
- cur++;
+ cur += inc;
}
- sp_free = ABS(cur - beg) * sizeof(cpustack_t);
+ sp_free = ABS(cur - beg) * sizeof(cpu_stack_t);
return sp_free;
}
void monitor_report(void)
{
- struct Process* p;
+ Node *node;
int i;
- if (LIST_EMPTY(&MonitorProcs))
- {
- kputs("No stacks registered in the monitor\n");
- return;
- }
-
- kprintf("%-24s%-8s%-8s%-8s%-8s\n", "Process name", "TCB", "SPbase", "SPsize", "SPfree");
- for (i=0;i<56;i++)
+ proc_forbid();
+ kprintf("%-9s%-9s%-9s%-9s%s\n", "TCB", "SPbase", "SPsize", "SPfree", "Name");
+ for (i = 0; i < 56; i++)
kputchar('-');
kputchar('\n');
- for (p = MONITOR_NODE_TO_PROCESS(LIST_HEAD(&MonitorProcs));
- p->monitor.link.succ;
- p = MONITOR_NODE_TO_PROCESS(p->monitor.link.succ))
+ FOREACH_NODE(node, &MonitorProcs)
{
- size_t free = monitor_checkStack(p->monitor.stack_base, p->monitor.stack_size);
- kprintf("%-24s%-8p%-8p%-8lu%-8lu\n",
- p->monitor.name, p, p->monitor.stack_base, p->monitor.stack_size, free);
+ Process *p = containerof(node, Process, monitor.link);
+ size_t free = monitor_checkStack(p->stack_base, p->stack_size);
+ kprintf("%-9p%-9p%-9zu%-9zu%s\n",
+ p, p->stack_base, p->stack_size, free, p->monitor.name);
}
+ proc_permit();
}
static void NORETURN monitor(void)
{
- struct Process *p;
+ Node *node;
- while (1)
+ for (;;)
{
- for (p = MONITOR_NODE_TO_PROCESS(LIST_HEAD(&MonitorProcs));
- p->monitor.link.succ;
- p = MONITOR_NODE_TO_PROCESS(p->monitor.link.succ))
+ proc_forbid();
+ FOREACH_NODE(node, &MonitorProcs)
{
- size_t free = monitor_checkStack(p->monitor.stack_base, p->monitor.stack_size);
+ Process *p = containerof(node, Process, monitor.link);
+ size_t free = monitor_checkStack(p->stack_base, p->stack_size);
- if (free < 0x20)
- kprintf("MONITOR: WARNING: Free stack for process '%s' is only %u chars\n",
+ if (p->stack_base && free < 0x20)
+ kprintf("MONITOR: Free stack of process '%s' is only %u chars\n",
p->monitor.name, (unsigned int)free);
-
- timer_delay(500);
}
+ proc_permit();
+
+ /* Give some rest to the system */
+ timer_delay(500);
}
}
-
-void monitor_start(size_t stacksize, cpustack_t *stack)
+void monitor_start(size_t stacksize, cpu_stack_t *stack)
{
- proc_new(monitor, NULL, stacksize, stack);
+ struct Process *p = proc_new(monitor, NULL, stacksize, stack);
+ proc_setPri(p, -10);
}
#endif /* CONFIG_KERN_MONITOR */