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ktrace: trace and decode thr_new() thr_param

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Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2025-06-04 08:41:47 +03:00
parent c27f7d6b9c
commit 56a4d1a4cc
3 changed files with 31 additions and 0 deletions
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8
sys/kern/kern_thr.c
View file

@ -26,11 +26,15 @@
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "opt_ktrace.h"
#include "opt_posix.h"
#include "opt_hwpmc_hooks.h"
#include <sys/systm.h>
#include <sys/kernel.h>
#ifdef KTRACE
#include <sys/ktrace.h>
#endif
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/mutex.h>
@ -188,6 +192,10 @@ kern_thr_new(struct thread *td, struct thr_param *param)
return (error);
rtpp = &rtp;
}
#ifdef KTRACE
if (KTRPOINT(td, KTR_STRUCT))
ktrthrparam(param);
#endif
return (thread_create(td, rtpp, thr_new_initthr, param));
}

2
sys/sys/ktrace.h
View file

@ -371,6 +371,8 @@ void ktrdata(int, const void *, size_t);
ktrstruct("cpuset_t", (s), l)
#define ktrsplice(s) \
ktrstruct("splice", (s), sizeof(struct splice))
#define ktrthrparam(s) \
ktrstruct("thrparam", (s), sizeof(struct thr_param))
extern u_int ktr_geniosize;
#ifdef KTRACE
extern int ktr_filesize_limit_signal;

21
usr.bin/kdump/kdump.c
View file

@ -50,6 +50,7 @@
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/sysent.h>
#include <sys/thr.h>
#include <sys/umtx.h>
#include <sys/un.h>
#include <sys/queue.h>
@ -109,6 +110,7 @@ static void ktrsockaddr(struct sockaddr *);
static void ktrsplice(struct splice *);
static void ktrstat(struct stat *);
static void ktrstruct(char *, size_t);
static void ktrthrparam(struct thr_param *);
static void ktrcapfail(struct ktr_cap_fail *);
static void ktrfault(struct ktr_fault *);
static void ktrfaultend(struct ktr_faultend *);
@ -1952,6 +1954,18 @@ ktrsplice(struct splice *sp)
(intmax_t)sp->sp_idle.tv_usec);
}
static void
ktrthrparam(struct thr_param *tp)
{
printf("thr param { start=%p arg=%p stack_base=%p "
"stack_size=%#zx tls_base=%p tls_size=%#zx child_tidp=%p "
"parent_tidp=%p flags=",
tp->start_func, tp->arg, tp->stack_base, tp->stack_size,
tp->tls_base, tp->tls_size, tp->child_tid, tp->parent_tid);
print_mask_arg(sysdecode_thr_create_flags, tp->flags);
printf(" rtp=%p }\n", tp->rtp);
}
static void
ktrstat(struct stat *statp)
{
@ -2147,6 +2161,13 @@ ktrstruct(char *buf, size_t buflen)
goto invalid;
memcpy(&sp, data, datalen);
ktrsplice(&sp);
} else if (strcmp(name, "thrparam") == 0) {
struct thr_param tp;
if (datalen != sizeof(tp))
goto invalid;
memcpy(&tp, data, datalen);
ktrthrparam(&tp);
} else {
#ifdef SYSDECODE_HAVE_LINUX
if (ktrstruct_linux(name, data, datalen) == false)