svn commit: r348078 - head/usr.sbin/pmc

[Conrad Meyer]

Author: cem
Date: Wed May 22 01:22:33 2019
New Revision: 348078
URL: https://svnweb.freebsd.org/changeset/base/348078

Log:
  pmc: Fix stack std::string lifetime
  
  It's invalid to reference a C++ string's c_str() buffer after the object
  goes out of scope.  Adjust the scope of the string to match the use in
  write(2) to fix the misuse.
  
  CID:		1393383
  Reported by:	Coverity

Modified:
  head/usr.sbin/pmc/cmd_pmc_filter.cc

Modified: head/usr.sbin/pmc/cmd_pmc_filter.cc
==============================================================================
--- head/usr.sbin/pmc/cmd_pmc_filter.cc	Wed May 22 01:11:21 2019	(r348077)
+++ head/usr.sbin/pmc/cmd_pmc_filter.cc	Wed May 22 01:22:33 2019	(r348078)
@@ -180,11 +180,12 @@ pmc_find_name(idmap & map, uint32_t id, char *list[LIS
 static void
 pmc_log_event(int fd, struct pmclog_ev *ev, bool json)
 {
+	string ret;
 	int len;
 	const void *buf;
 
 	if (json) {
-		string ret = event_to_json(ev);
+		ret = event_to_json(ev);
 		buf = ret.c_str();
 		len = ret.size();
 	} else {