.

wcfs/internal/wcfs_test.pyx

@@ -109,8 +109,12 @@ cdef void _read_mustfault(const unsigned char *p) nogil except +topyexc:
     act.sa_handler = mustfaultSighand
     act.sa_flags   = 0
 
-    sigemptyset(&act.sa_mask)           # XXX err
-    sigaction(SIGSEGV, &act, &saveact)  # XXX err
+    err = sigemptyset(&act.sa_mask)
+    if err != 0:
+        panic("sigemptyset: failed")
+    err = sigaction(SIGSEGV, &act, &saveact)
+    if err != 0:
+        panic("sigaction SIGSEGV -> mustfaultSighand: failed")
 
     faultExpected = True
     faultedOk     = False
@@ -124,7 +128,9 @@ cdef void _read_mustfault(const unsigned char *p) nogil except +topyexc:
             panic("faulted, but !faultedOk")
 
     faultExpected = False
-    sigaction(SIGSEGV, &saveact, NULL)  # XXX err
+    err = sigaction(SIGSEGV, &saveact, NULL)
+    if err != 0:
+        panic("sigaction SIGSEGV <- restore: failed")
 
 def read_mustfault(const unsigned char[::1] mem not None):
     assert len(mem) == 1, "read_mustfault: only [1] mem is supported for now"