Author: kib
Date: Fri Dec 16 11:44:20 2011
New Revision: 228569
URL: http://svn.freebsd.org/changeset/base/228569
Log:
Add 'findstack' ddb command to search either the thread kernel stack
or cached stack containing the specified kernel virtual address.
Discussed with: pho
MFC after: 1 week
Modified:
head/sys/ddb/db_command.c
head/sys/ddb/db_ps.c
head/sys/ddb/ddb.h
Modified: head/sys/ddb/db_command.c
==============================================================================
--- head/sys/ddb/db_command.c Fri Dec 16 11:42:50 2011 (r228568)
+++ head/sys/ddb/db_command.c Fri Dec 16 11:44:20 2011 (r228569)
@@ -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);
Modified: head/sys/ddb/db_ps.c
==============================================================================
--- head/sys/ddb/db_ps.c Fri Dec 16 11:42:50 2011 (r228568)
+++ head/sys/ddb/db_ps.c Fri Dec 16 11:44:20 2011 (r228569)
@@ -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;
+ }
+ }
+}
Modified: head/sys/ddb/ddb.h
==============================================================================
--- head/sys/ddb/ddb.h Fri Dec 16 11:42:50 2011 (r228568)
+++ head/sys/ddb/ddb.h Fri Dec 16 11:44:20 2011 (r228569)
@@ -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;
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "[email protected]"
