svn commit: r365493 - head/lib/libc/tests/resolv
Kyle Evans
kevans at FreeBSD.org
Wed Sep 9 02:42:21 UTC 2020
Author: kevans
Date: Wed Sep 9 02:42:21 2020
New Revision: 365493
URL: https://svnweb.freebsd.org/changeset/base/365493
Log:
libc/resolv: attempt to fix the test under WARNS=6
In a side-change that I'm working on to start defaulting src builds to
WARNS=6 where WARNS isn't otherwise specified, GCC6 (and clang, to a lesser
extent) pointed out a number of issues with the resolv tests:
- Global method variable that gets shadowed in run_tests()
- Signed/unsigned comparison between i in run_tests() and hosts->sl_cur
The shadowed variable looks like it might actually be bogus as written, as
we pass it to RUN_TESTS -> run_tests, but other parts use the global method
instead. This change is mainly geared towards correcting that by removing
the global and plumbing the method through from run_tests -> run into the
new thread.
For the signed/unsigned comparison, there's no compelling reason to not just
switch i/nthreads/nhosts to size_t.
The review also included a change to the load() function that was better
addressed by jhb in r365302.
Reviewed by: ngie, pstef
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D24844
Modified:
head/lib/libc/tests/resolv/resolv_test.c
Modified: head/lib/libc/tests/resolv/resolv_test.c
==============================================================================
--- head/lib/libc/tests/resolv/resolv_test.c Wed Sep 9 00:41:31 2020 (r365492)
+++ head/lib/libc/tests/resolv/resolv_test.c Wed Sep 9 02:42:21 2020 (r365493)
@@ -34,6 +34,8 @@ __RCSID("$NetBSD: resolv.c,v 1.6 2004/05/23 16:59:11 c
#include <sys/types.h>
#include <sys/socket.h>
+#include <assert.h>
+#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <netdb.h>
@@ -55,14 +57,13 @@ enum method {
};
static StringList *hosts = NULL;
-static enum method method = METHOD_GETADDRINFO;
static int *ask = NULL;
static int *got = NULL;
static void load(const char *);
-static void resolvone(int);
+static void resolvone(int, enum method);
static void *resolvloop(void *);
-static void run(int *);
+static void run(int *, enum method);
static pthread_mutex_t stats = PTHREAD_MUTEX_INITIALIZER;
@@ -173,18 +174,18 @@ resolv_getipnodeby(pthread_t self, char *host)
}
static void
-resolvone(int n)
+resolvone(int n, enum method method)
{
char buf[1024];
pthread_t self = pthread_self();
size_t i = (random() & 0x0fffffff) % hosts->sl_cur;
char *host = hosts->sl_str[i];
- struct addrinfo hints, *res;
int error, len;
len = snprintf(buf, sizeof(buf), "%p: %d resolving %s %d\n",
self, n, host, (int)i);
(void)write(STDOUT_FILENO, buf, len);
+ error = 0;
switch (method) {
case METHOD_GETADDRINFO:
error = resolv_getaddrinfo(self, host, i);
@@ -196,6 +197,10 @@ resolvone(int n)
error = resolv_getipnodeby(self, host);
break;
default:
+ /* UNREACHABLE */
+ /* XXX Needs an __assert_unreachable() for userland. */
+ assert(0 && "Unreachable segment reached");
+ abort();
break;
}
pthread_mutex_lock(&stats);
@@ -204,35 +209,53 @@ resolvone(int n)
pthread_mutex_unlock(&stats);
}
+struct resolvloop_args {
+ int *nhosts;
+ enum method method;
+};
+
static void *
resolvloop(void *p)
{
- int *nhosts = (int *)p;
- if (*nhosts == 0)
+ struct resolvloop_args *args = p;
+
+ if (*args->nhosts == 0) {
+ free(args);
return NULL;
+ }
+
do
- resolvone(*nhosts);
- while (--(*nhosts));
+ resolvone(*args->nhosts, args->method);
+ while (--(*args->nhosts));
+ free(args);
return NULL;
}
static void
-run(int *nhosts)
+run(int *nhosts, enum method method)
{
pthread_t self;
int rc;
+ struct resolvloop_args *args;
+ /* Created thread is responsible for free(). */
+ args = malloc(sizeof(*args));
+ ATF_REQUIRE(args != NULL);
+
+ args->nhosts = nhosts;
+ args->method = method;
self = pthread_self();
- rc = pthread_create(&self, NULL, resolvloop, nhosts);
+ rc = pthread_create(&self, NULL, resolvloop, args);
ATF_REQUIRE_MSG(rc == 0, "pthread_create failed: %s", strerror(rc));
}
static int
run_tests(const char *hostlist_file, enum method method)
{
- int nthreads = NTHREADS;
- int nhosts = NHOSTS;
- int i, c, done, *nleft;
+ size_t nthreads = NTHREADS;
+ size_t nhosts = NHOSTS;
+ size_t i;
+ int c, done, *nleft;
hosts = sl_init();
srandom(1234);
@@ -252,7 +275,7 @@ run_tests(const char *hostlist_file, enum method metho
for (i = 0; i < nthreads; i++) {
nleft[i] = nhosts;
- run(&nleft[i]);
+ run(&nleft[i], method);
}
for (done = 0; !done;) {
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