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Avoid clobbered variable warning on ppc64le.

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Since commit e2ed6fbeb1, Ci on ppc64le with Ubuntu 16.04.6 LTS throws
this error:

lib/fatal-signal.c: In function 'send_backtrace_to_monitor':
lib/fatal-signal.c:168:9: error: variable 'dep' might be clobbered by
'longjmp' or 'vfork' [-Werror=clobbered]
     int dep;

Declaring dep as a volatile int.

Signed-off-by: David Wilder <dwilder@us.ibm.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
This commit is contained in:
David Wilder
2019-10-08 12:40:19 -07:00
committed by Ben Pfaff
parent 76c67e9ac3
commit 4093b4c79f
1 changed files with 2 additions and 1 deletions
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3
lib/fatal-signal.c
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@@ -165,7 +165,8 @@ fatal_signal_add_hook(void (*hook_cb)(void *aux), void (*cancel_cb)(void *aux),
*/
static inline void
send_backtrace_to_monitor(void) {
int dep;
/* volatile added to prevent a "clobbered" error on ppc64le with gcc */
volatile int dep;
struct unw_backtrace unw_bt[UNW_MAX_DEPTH];
unw_cursor_t cursor;
unw_context_t uc;