Don't rely on inferior I/O in gdb.base/siginfo-addr.exp

No point in relying on stdio in this test.  Simply run to a breakpoint
instead.

gdb/testsuite/ChangeLog:
2015-07-29  Pedro Alves  <palves@redhat.com>

	* gdb.base/siginfo-addr.c (pass): New function.
	(handler): Call it iff si_addr is correct.
	* gdb.base/siginfo-addr.exp: Remove gdb_skip_stdio_test check.
	Set a breakpoint at "pass" and continue to it.

gdb/testsuite/ChangeLog

@@ -1,3 +1,10 @@
+2015-07-29  Pedro Alves  <palves@redhat.com>
+
+	* gdb.base/siginfo-addr.c (pass): New function.
+	(handler): Call it iff si_addr is correct.
+	* gdb.base/siginfo-addr.exp: Remove gdb_skip_stdio_test check.
+	Set a breakpoint at "pass" and continue to it.
+
 2015-07-28  Sergio Durigan Junior  <sergiodj@redhat.com>
 
 	* gdb.python/py-objfile.exp: Make some tests have unique names.

gdb/testsuite/gdb.base/siginfo-addr.c

@@ -26,13 +26,16 @@
 
 static void *p;
 
+void
+pass (void)
+{
+}
+
 static void
 handler (int sig, siginfo_t *info, void *context)
 {
   if (info->si_addr == p)
-    printf ("Correct si_addr value.\n");
-  else
-    printf ("Got si_addr = %p, expected %p.\n", info->si_addr, p);
+    pass ();
   _exit (0);
 }
 

gdb/testsuite/gdb.base/siginfo-addr.exp

@@ -26,11 +26,6 @@ if [target_info exists gdb,nosignals] {
     continue
 }
 
-if [gdb_skip_stdio_test "siginfo-addr.exp"] {
-    continue
-}
-
-
 standard_testfile
 if {[prepare_for_testing $testfile.exp $testfile $srcfile debug]} {
     untested "Couldn't compile ${srcfile}.c"
@@ -47,13 +42,7 @@ if { ![runto_main] } then {
 # Run to the signal.
 gdb_test "continue" ".*Program received signal SIGSEGV.*" "continue to signal"
 
+gdb_breakpoint "pass"
+
 # Check for correct si_addr.
-set test "program exit"
-gdb_test_multiple "continue" "${test}" {
-    -re "Correct si_addr" {
-	pass "si_addr value"
-    }
-    -re "Got si_addr" {
-	fail "si_addr value"
-    }
-}
+gdb_test "continue" "Breakpoint .* pass .*" "correct si_addr"