aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorKonstantin Belousov <kib@FreeBSD.org>2021-04-24 12:02:40 +0000
committerKonstantin Belousov <kib@FreeBSD.org>2021-05-03 16:18:25 +0000
commit68d311b66678d9daffc5cf1c78f3101f2eeec3ea (patch)
treef13233d1bfc22c012655e1389359f81ae69b5d6c
parent9ebf9100bad129a92961572ac862781d6c5681c7 (diff)
downloadsrc-68d311b66678d9daffc5cf1c78f3101f2eeec3ea.tar.gz
src-68d311b66678d9daffc5cf1c78f3101f2eeec3ea.zip
ptracestop: mark threads suspended there with the new TDB_SSWITCH flag
This way threads in ptracestop can be discovered by debugger Reviewed by: markj Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D29955
-rw-r--r--sys/kern/kern_sig.c2
-rw-r--r--sys/sys/proc.h1
2 files changed, 3 insertions, 0 deletions
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
index 46b520030dcd..445582a176c8 100644
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -2648,7 +2648,9 @@ ptracestop(struct thread *td, int sig, ksiginfo_t *si)
td->td_dbgflags &= ~TDB_STOPATFORK;
}
stopme:
+ td->td_dbgflags |= TDB_SSWITCH;
thread_suspend_switch(td, p);
+ td->td_dbgflags &= ~TDB_SSWITCH;
if (p->p_xthread == td)
p->p_xthread = NULL;
if (!(p->p_flag & P_TRACED))
diff --git a/sys/sys/proc.h b/sys/sys/proc.h
index e02e97d74229..b959681e992b 100644
--- a/sys/sys/proc.h
+++ b/sys/sys/proc.h
@@ -485,6 +485,7 @@ do { \
#define TDB_VFORK 0x00000800 /* vfork indicator for ptrace() */
#define TDB_FSTP 0x00001000 /* The thread is PT_ATTACH leader */
#define TDB_STEP 0x00002000 /* (x86) PSL_T set for PT_STEP */
+#define TDB_SSWITCH 0x00004000 /* Suspended in ptracestop */
/*
* "Private" flags kept in td_pflags: