Author: jh
Date: Sat May 7 11:10:58 2011
New Revision: 221597
URL: http://svn.freebsd.org/changeset/base/221597
Log:
Add WITNESS_WARN() to getenv() to explicitly note that the function may
sleep. This helps to expose bugs when the requested environment variable
doesn't exist.
Modified:
head/sys/kern/kern_environment.c
Modified: head/sys/kern/kern_environment.c
==============================================================================
--- head/sys/kern/kern_environment.c Sat May 7 11:05:16 2011
(r221596)
+++ head/sys/kern/kern_environment.c Sat May 7 11:10:58 2011
(r221597)
@@ -310,6 +310,7 @@ getenv(const char *name)
int len;
if (dynamic_kenv) {
+ WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, "getenv");
mtx_lock(&kenv_lock);
cp = _getenv_dynamic(name, NULL);
if (cp != NULL) {
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