From: Stefan Weil <s...@weilnetz.de>
gcc warning:
/qemu/util/oslib-posix.c:304:11: error:
variable ‘addr’ might be clobbered by ‘longjmp’ or ‘vfork’
[-Werror=clobbered]
Fix also some related data types:
numpages, hpagesize are used as pointer offset.
Always use size_t for them and also for the derived
numpages_per_thread and size_per_thread.
Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org>
Signed-off-by: Stefan Weil <s...@weilnetz.de>
Message-id: 20171016202912.1117-1...@weilnetz.de
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
util/oslib-posix.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index 80086c549f..382bd4a231 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -59,8 +59,8 @@
struct MemsetThread {
char *addr;
- uint64_t numpages;
- uint64_t hpagesize;
+ size_t numpages;
+ size_t hpagesize;
QemuThread pgthread;
sigjmp_buf env;
};
@@ -301,11 +301,7 @@ static void sigbus_handler(int signal)
static void *do_touch_pages(void *arg)
{
MemsetThread *memset_args = (MemsetThread *)arg;
- char *addr = memset_args->addr;
- uint64_t numpages = memset_args->numpages;
- uint64_t hpagesize = memset_args->hpagesize;
sigset_t set, oldset;
- int i = 0;
/* unblock SIGBUS */
sigemptyset(&set);
@@ -315,6 +311,10 @@ static void *do_touch_pages(void *arg)
if (sigsetjmp(memset_args->env, 1)) {
memset_thread_failed = true;
} else {
+ char *addr = memset_args->addr;
+ size_t numpages = memset_args->numpages;
+ size_t hpagesize = memset_args->hpagesize;
+ size_t i;
for (i = 0; i < numpages; i++) {
/*
* Read & write back the same value, so we don't
@@ -351,7 +351,8 @@ static inline int get_memset_num_threads(int smp_cpus)
static bool touch_all_pages(char *area, size_t hpagesize, size_t numpages,
int smp_cpus)
{
- uint64_t numpages_per_thread, size_per_thread;
+ size_t numpages_per_thread;
+ size_t size_per_thread;
char *addr = area;
int i = 0;
--
2.13.6
