MFV r323527: 5815 libzpool's panic function doesn't set global panicstr, ::status not as useful

illumos/illumos-gate@fae6347731c9d3f46b26338313b0422927f29cf6
https://github.com/illumos/illumos-gate/commit/fae6347731c9d3f46b26338313b0422927f29cf6

https://www.illumos.org/issues/5815
  When panic() is called from within ztest, the mdb ::status command isn't as
  useful as it could be since the global panicstr variable isn't updated. We
  should modify the function to make sure panicstr is set, so ::status can
  present the error message just like it does on a failed assertion.

Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Sebastien Roy <sebastien.roy@delphix.com>
Reviewed by: Gordon Ross <gordon.ross@nexenta.com>
Reviewed by: Rich Lowe <richlowe@richlowe.net>
Approved by: Dan McDonald <danmcd@omniti.com>
Author: Prakash Surya <prakash.surya@delphix.com>
MFC after:	4 weeks

1 files changed, 3 insertions, 5 deletions

diff --git a/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c b/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c
index 701f0b43bf84..ab1b839975ab 100644
--- a/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c
+++ b/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c
@@ -735,11 +735,9 @@ static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" };
 void
 vpanic(const char *fmt, va_list adx)
 {
-	(void) fprintf(stderr, "error: ");
-	(void) vfprintf(stderr, fmt, adx);
-	(void) fprintf(stderr, "\n");
-
-	abort();	/* think of it as a "user-level crash dump" */
+	char buf[512];
+	(void) vsnprintf(buf, 512, fmt, adx);
+	assfail(buf, NULL, 0);
 }
 
 void