[gdb/testsuite] Handle remote host in some test-cases

I ran test-case gdb.base/default.exp with make-check-all.sh, and noticed a
FAIL with host/target board local-remote-host-native:
...
FAIL: $exp: show convenience ($_colorsupport = "monochrome" not found)
...

The problem is that part of the test-case relies on "setenv TERM dumb", and
setenv, which is a tcl command (which runs on build), only has effect in gdb
(which runs on host), if build == host, in other words, local host.

I grepped for test-cases using setenv, and ran them with the host/target
board, and fixed the FAILs I saw.

All FAILs have the same cause as I described above, except for
proc test_data_directory in gdb.python/py-parameter.exp, which handles files
assuming local host.  I chose to leave it that way, and bail out but add a
comment.

Implementationwise, the change to test-case gdb.base/default.exp is the most
intrusive: it replaces a use of proc gdb_test_list_exact with a use of proc
gdb_get_lines_no_pass, because it allows specifying a regexp match.

In the process, I found out gdb_test_list_exact has a bug, filed as PR33038.

Because of this bug, I had to add matching of convenience variable $_tbl.

Tested on x86_64-linux.

gdb/testsuite/gdb.base/default.exp

@@ -759,7 +759,6 @@ set show_conv_list \
 	{$_probe_arg10 = <error: No frame selected>} \
 	{$_probe_arg11 = <error: No frame selected>} \
 	{$_cimag = <internal function _cimag>} \
-	{$_colorsupport = "monochrome"} \
 	{$_creal = <internal function _creal>} \
 	{$_isvoid = <internal function _isvoid>} \
 	{$_shell = <internal function _shell>} \
@@ -788,10 +787,40 @@ if [allow_python_tests] {
 	    {$_any_caller_matches = <internal function _any_caller_matches>} \
 	}
 }
-gdb_test_list_exact "show convenience" "show convenience" \
-    "\[^\r\n\]+\[\r\n\]+" \
-    "\[^\r\n\]+" \
-    $show_conv_list
+
+set lines [gdb_get_lines_no_pass "show convenience"]
+set matches 0
+set all_found 1
+foreach s $show_conv_list {
+    if { ![regexp (^|\r\n)[string_to_regexp $s](\r\n|$) $lines] } {
+	verbose -log "didn't match: '$s'"
+	set all_found 0
+	break
+    }
+    incr matches
+}
+
+set re_var [string_to_regexp {$_colorsupport}]
+if { [is_remote host] } {
+    set re_val {[^\r\n]+}
+} else {
+    set re_val [string_to_regexp {"monochrome"}]
+}
+if { [regexp "$re_var = $re_val" $lines] } {
+    incr matches
+} else {
+    set all_found 0
+}
+
+if { [regexp [string_to_regexp {$_tlb = void}] $lines] } {
+    incr matches
+} else {
+    # Convenience variable _tlb is added only if support for windows targets
+    # is enabled.  Don't complain if it's missing.
+}
+
+gdb_assert { $all_found && $matches == [count_newlines $lines] } \
+    "show convenience"
 
 #test show directories
 gdb_test "show directories" "Source directories searched: .cdir\[:;\].cwd"

gdb/testsuite/gdb.base/readline-ask.exp

@@ -13,6 +13,8 @@
 # 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 {!is_remote host}
+
 standard_testfile .c
 set inputrc ${srcdir}/${subdir}/${testfile}.inputrc
 

gdb/testsuite/gdb.base/readline.exp

@@ -21,6 +21,8 @@
 # Tests for readline operations.
 #
 
+require {!is_remote host}
+
 # This function is used to test operate-and-get-next.
 # NAME is the name of the test.
 # ARGS is a list of alternating commands and expected results.

gdb/testsuite/gdb.base/style.exp

@@ -13,6 +13,8 @@
 # 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 {!is_remote host}
+
 load_lib gdb-python.exp
 
 # Test CLI output styling.

gdb/testsuite/gdb.guile/scm-parameter.exp

@@ -565,47 +565,50 @@ rename scm_param_test_maybe_no_output ""
 
 # Test a color parameter.
 
-with_ansi_styling_terminal {
-    # This enables 256 colors support and disables colors approximation.
-    setenv TERM xterm-256color
-    setenv COLORTERM truecolor
+if { ![is_remote host] } {
+    with_ansi_styling_terminal {
 
-    # Start with a fresh gdb.
-    gdb_exit
-    gdb_start
-    gdb_reinitialize_dir $srcdir/$subdir
+	# This enables 256 colors support and disables colors approximation.
+	setenv TERM xterm-256color
+	setenv COLORTERM truecolor
 
-    gdb_install_guile_utils
-    gdb_install_guile_module
+	# Start with a fresh gdb.
+	gdb_exit
+	gdb_start
+	gdb_reinitialize_dir $srcdir/$subdir
 
-    # We use "." here instead of ":" so that this works on win32 too.
-    set escaped_directory [string_to_regexp "$srcdir/$subdir"]
+	gdb_install_guile_utils
+	gdb_install_guile_module
 
-    gdb_test_multiline "color gdb parameter" \
-	"guile" "" \
-	"(define test-color-param" "" \
-	"  (make-parameter \"print test-color-param\"" "" \
-	"   #:command-class COMMAND_DATA" "" \
-	"   #:parameter-type PARAM_COLOR" "" \
-	"   #:doc \"When set, test param does something useful. When disabled, does nothing.\"" "" \
-	"   #:show-doc \"Show the state of the test-color-param.\"" "" \
-	"   #:set-doc \"Set the state of the test-color-param.\"" "" \
-	"   #:show-func (lambda (self value)" "" \
-	"      (format #f \"The state of the test-color-param is ~a.\" value))" "" \
-	"   #:initial-value (make-color \"green\")))" "" \
-	"(register-parameter! test-color-param)" "" \
-	"end"
+	# We use "." here instead of ":" so that this works on win32 too.
+	set escaped_directory [string_to_regexp "$srcdir/$subdir"]
 
-    with_test_prefix "test-color-param" {
-	with_test_prefix "initial-value" {
-	    gdb_test "guile (print (parameter-value test-color-param))" "= #<gdb:color green COLORSPACE_ANSI_8COLOR>" "color parameter value (green)"
-	    gdb_test "show print test-color-param" "The state of the test-color-param is green." "show initial value"
-	    gdb_test_no_output "set print test-color-param 255"
-	}
-	with_test_prefix "new-value" {
-	    gdb_test "show print test-color-param" "The state of the test-color-param is 255." "show new value"
-	    gdb_test "guile (print (parameter-value test-color-param))" "= #<gdb:color 255 COLORSPACE_XTERM_256COLOR>" "color parameter value (255)"
-	    gdb_test "set print test-color-param 256" "integer 256 out of range.*" "set invalid color parameter"
+	gdb_test_multiline "color gdb parameter" \
+	    "guile" "" \
+	    "(define test-color-param" "" \
+	    "  (make-parameter \"print test-color-param\"" "" \
+	    "   #:command-class COMMAND_DATA" "" \
+	    "   #:parameter-type PARAM_COLOR" "" \
+	    "   #:doc \"When set, test param does something useful. When disabled, does nothing.\"" "" \
+	    "   #:show-doc \"Show the state of the test-color-param.\"" "" \
+	    "   #:set-doc \"Set the state of the test-color-param.\"" "" \
+	    "   #:show-func (lambda (self value)" "" \
+	    "      (format #f \"The state of the test-color-param is ~a.\" value))" "" \
+	    "   #:initial-value (make-color \"green\")))" "" \
+	    "(register-parameter! test-color-param)" "" \
+	    "end"
+
+	with_test_prefix "test-color-param" {
+	    with_test_prefix "initial-value" {
+		gdb_test "guile (print (parameter-value test-color-param))" "= #<gdb:color green COLORSPACE_ANSI_8COLOR>" "color parameter value (green)"
+		gdb_test "show print test-color-param" "The state of the test-color-param is green." "show initial value"
+		gdb_test_no_output "set print test-color-param 255"
+	    }
+	    with_test_prefix "new-value" {
+		gdb_test "show print test-color-param" "The state of the test-color-param is 255." "show new value"
+		gdb_test "guile (print (parameter-value test-color-param))" "= #<gdb:color 255 COLORSPACE_XTERM_256COLOR>" "color parameter value (255)"
+		gdb_test "set print test-color-param 256" "integer 256 out of range.*" "set invalid color parameter"
+	    }
 	}
     }
 }

gdb/testsuite/gdb.python/py-parameter.exp

@@ -45,6 +45,9 @@ proc_with_prefix test_directories { } {
 }
 
 proc_with_prefix test_data_directory { } {
+    # Proc assumes local host.
+    require {!is_remote host}
+
     clean_restart
 
     # Check we can correctly read the data-directory parameter.  First,
@@ -187,6 +190,8 @@ proc_with_prefix test_enum_parameter { } {
 
 # Test an color parameter.
 proc_with_prefix test_color_parameter { } {
+    require {!is_remote host}
+
     global env
     with_ansi_styling_terminal {
 	# This enables 256 colors support and disables colors approximation.