Rename to allow_xml_test

This changes gdb_skip_xml_test to invert the sense, and renames it to
allow_xml_test.

gdb/testsuite/gdb.arch/arc-tdesc-cpu.exp

@@ -13,7 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-require !gdb_skip_xml_test
+require allow_xml_test
 
 gdb_start
 

gdb/testsuite/gdb.base/catch-syscall.exp

@@ -781,7 +781,7 @@ fill_all_syscalls_numbers
 
 # Execute the tests, using XML support
 gdb_exit
-if { ![gdb_skip_xml_test] } {
+if { [allow_xml_test] } {
   clean_restart $binfile
   do_syscall_tests
 

gdb/testsuite/gdb.base/info-os.exp

@@ -22,7 +22,7 @@ if {![istarget *-*-linux*]} {
 }
 
 # Support for XML-output is needed to run this test.
-require !gdb_skip_xml_test
+require allow_xml_test
 
 # Compile test program.
 if { [prepare_for_testing "failed to prepare" $testfile $srcfile {debug pthreads}] } {

gdb/testsuite/gdb.base/valgrind-bt.exp

@@ -14,7 +14,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # Valgrind gdbserver requires gdb with xml support.
-require !gdb_skip_xml_test
+require allow_xml_test
 
 load_lib valgrind.exp
 

gdb/testsuite/gdb.base/valgrind-disp-step.exp

@@ -19,7 +19,7 @@
 # automatically instead of getting stuck or crashing.
 
 # Valgrind gdbserver requires gdb with xml support.
-require !gdb_skip_xml_test
+require allow_xml_test
 
 load_lib valgrind.exp
 

gdb/testsuite/gdb.base/valgrind-infcall-2.exp

@@ -30,7 +30,7 @@
 # Aborted (core dumped)
 
 # Valgrind gdbserver requires gdb with xml support.
-require !gdb_skip_xml_test
+require allow_xml_test
 
 load_lib valgrind.exp
 

gdb/testsuite/gdb.base/valgrind-infcall.exp

@@ -14,7 +14,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # Valgrind gdbserver requires gdb with xml support.
-require !gdb_skip_xml_test
+require allow_xml_test
 
 load_lib valgrind.exp
 

gdb/testsuite/gdb.gdb/unittest.exp

@@ -19,7 +19,7 @@ require !gdb_debug_enabled
 
 load_lib completion-support.exp
 
-set do_xml_test [expr ![gdb_skip_xml_test]]
+set do_xml_test [allow_xml_test]
 
 standard_testfile
 

gdb/testsuite/gdb.mi/list-thread-groups-available.exp

@@ -21,7 +21,7 @@ set MIFLAGS "-i=mi"
 standard_testfile
 
 # Support for XML is needed to run this test.
-require !gdb_skip_xml_test
+require allow_xml_test
 
 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
     untested "failed to compile"

gdb/testsuite/gdb.mi/mi-info-os.exp

@@ -23,7 +23,7 @@ if {![istarget *-*-linux*]} {
 }
 
 # Support for XML-output is needed to run this test.
-require !gdb_skip_xml_test
+require allow_xml_test
 
 gdb_exit
 if [mi_gdb_start] {

gdb/testsuite/gdb.server/ext-run.exp

@@ -27,8 +27,8 @@ if {[build_executable $testfile.exp $testfile $srcfile debug] == -1} {
     return -1
 }
 
-# gdb_skip_xml_test must be called while gdb is not running.
-set do_xml_test [expr ![gdb_skip_xml_test]]
+# allow_xml_test must be called while gdb is not running.
+set do_xml_test [allow_xml_test]
 
 save_vars { GDBFLAGS } {
     # If GDB and GDBserver are both running locally, set the sysroot to avoid

gdb/testsuite/gdb.xml/maint-xml-dump.exp

@@ -37,7 +37,7 @@
 #
 # 4. Indentation of lines will be preserved so your input file needs
 #    to follow the expected indentation.
-require !gdb_skip_xml_test
+require allow_xml_test
 
 gdb_start
 

gdb/testsuite/gdb.xml/maint_print_struct.exp

@@ -17,7 +17,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-require !gdb_skip_xml_test
+require allow_xml_test
 
 gdb_start
 

gdb/testsuite/gdb.xml/tdesc-arch.exp

@@ -13,7 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-require !gdb_skip_xml_test
+require allow_xml_test
 
 gdb_start
 

gdb/testsuite/gdb.xml/tdesc-errors.exp

@@ -13,7 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-require !gdb_skip_xml_test
+require allow_xml_test
 
 gdb_start
 

gdb/testsuite/gdb.xml/tdesc-regs.exp

@@ -13,7 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-require !gdb_skip_xml_test
+require allow_xml_test
 
 gdb_start
 

gdb/testsuite/gdb.xml/tdesc-reload.exp

@@ -16,7 +16,7 @@
 # Testing for 'maint print xml-tdesc'.  Check we can print out the
 # current target description and load it back in again.
 
-require !gdb_skip_xml_test
+require allow_xml_test
 
 standard_testfile
 

gdb/testsuite/gdb.xml/tdesc-xinclude.exp

@@ -13,7 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-require !gdb_skip_xml_test
+require allow_xml_test
 
 gdb_start
 

gdb/testsuite/lib/gdb.exp

@@ -6970,17 +6970,16 @@ proc gdb_skip_bogus_test { msg } {
     return 0
 }
 
-# Return true if a test should be skipped due to lack of XML support
-# in the host GDB.
+# Return true if XML support is enabled in the host GDB.
 # NOTE: This must be called while gdb is *not* running.
 
-gdb_caching_proc gdb_skip_xml_test {
+gdb_caching_proc allow_xml_test {
     global gdb_spawn_id
     global gdb_prompt
     global srcdir
 
     if { [info exists gdb_spawn_id] } {
-        error "GDB must not be running in gdb_skip_xml_tests."
+	error "GDB must not be running in allow_xml_tests."
     }
 
     set xml_file [gdb_remote_download host "${srcdir}/gdb.xml/trivial.xml"]
@@ -6994,7 +6993,7 @@ gdb_caching_proc gdb_skip_xml_test {
 	-re ".*$gdb_prompt $" { }
     }
     gdb_exit
-    return $xml_missing
+    return [expr {!$xml_missing}]
 }
 
 # Return true if argv[0] is available.

gdb/testsuite/lib/gdbserver-support.exp

@@ -171,7 +171,7 @@ proc skip_gdbserver_tests { } {
     # multiple target descriptions, GDB doesn't know which target
     # description GDBserver uses, and may fail to parse 'g' packet
     # after connection.
-    if { [gdb_skip_xml_test]
+    if { ![allow_xml_test]
 	 && ([istarget "arm*-*-linux*"]
 	     || [istarget "aarch64*-*-linux*"]
 	     || [istarget "mips*-*-linux*"]