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Add 'findstack' ddb command to search either the thread kernel stack

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or cached stack containing the specified kernel virtual address.

Discussed with:	pho
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2011-12-16 11:44:20 +00:00
parent 38474ef299
commit 9ab83ecbcb
3 changed files with 39 additions and 0 deletions
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1
sys/ddb/db_command.c
View File

@ -140,6 +140,7 @@ static struct command db_cmds[] = {
{ "unscript", db_unscript_cmd, CS_OWN, 0 },
{ "capture", db_capture_cmd, CS_OWN, 0 },
{ "textdump", db_textdump_cmd, CS_OWN, 0 },
{ "findstack", db_findstack_cmd, 0, 0 },
};
struct command_table db_cmd_table = LIST_HEAD_INITIALIZER(db_cmd_table);

37
sys/ddb/db_ps.c
View File

@ -37,6 +37,7 @@ __FBSDID("$FreeBSD$");
#include <sys/proc.h>
#include <sys/sysent.h>
#include <sys/systm.h>
#include <sys/_kstack_cache.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
@ -429,3 +430,39 @@ DB_SHOW_COMMAND(proc, db_show_proc)
break;
}
}
void
db_findstack_cmd(db_expr_t addr, boolean_t have_addr,
db_expr_t dummy3 __unused, char *dummy4 __unused)
{
struct proc *p;
struct thread *td;
struct kstack_cache_entry *ks_ce;
vm_offset_t saddr;
if (have_addr)
saddr = addr;
else {
db_printf("Usage: findstack <address>\n");
return;
}
for (p = LIST_FIRST(&allproc); p != NULL; p = LIST_NEXT(p, p_list)) {
FOREACH_THREAD_IN_PROC(p, td) {
if (td->td_kstack <= saddr && saddr < td->td_kstack +
PAGE_SIZE * td->td_kstack_pages) {
db_printf("Thread %p\n", td);
return;
}
}
}
for (ks_ce = kstack_cache; ks_ce != NULL;
ks_ce = ks_ce->next_ks_entry) {
if ((vm_offset_t)ks_ce <= saddr && saddr < (vm_offset_t)ks_ce +
PAGE_SIZE * KSTACK_PAGES) {
db_printf("Cached stack %p\n", ks_ce);
return;
}
}
}

1
sys/ddb/ddb.h
View File

@ -226,6 +226,7 @@ db_cmdfcn_t db_delete_cmd;
db_cmdfcn_t db_deletehwatch_cmd;
db_cmdfcn_t db_deletewatch_cmd;
db_cmdfcn_t db_examine_cmd;
db_cmdfcn_t db_findstack_cmd;
db_cmdfcn_t db_hwatchpoint_cmd;
db_cmdfcn_t db_listbreak_cmd;
db_cmdfcn_t db_scripts_cmd;