[binutils-gdb] Fix defaults of some "maint test-settings" subcommands

[binutils-gdb] Fix defaults of some "maint test-settings" subcommands

[Pedro Alves]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=970f9d091dae835304d1a96805bdb5c081a40b48

commit 970f9d091dae835304d1a96805bdb5c081a40b48
Author: Pedro Alves <palves@redhat.com>
Date:   Wed Jul 3 13:34:17 2019 +0100

    Fix defaults of some "maint test-settings" subcommands
    
    New tests added later for the incoming "with" command exposed a couple
    invalid-default-value bugs in the "maint test-settings" commands:
    
    - var_filename commands don't allow setting the filename to the empty
      string (unlike var_optional_filename commands), yet, "maint
      test-settings filename"'s control variable was not initialized, so
      on startup, "maint test-settings show filename" shows an empty
      string.
    
    - "maint test-settings enum"'s control variable was not initialized,
      so on startup, "maint test-settings show enum" shows an empty value
      instead of a valid enum value.
    
    Both issues are fixed by initializing the control variables.
    
    gdb/ChangeLog:
    2019-07-03  Pedro Alves  <palves@redhat.com>
    
    	* maint-test-settings.c (maintenance_test_settings_xxx)
    	(maintenance_test_settings_yyy, maintenance_test_settings_zzz):
    	New.
    	(maintenance_test_settings_enums): Use them.
    	(maintenance_test_settings_enum): Default to
    	maintenance_test_settings_xxx.
    	(_initialize_maint_test_settings): Initialize
    	MAINTENANCE_TEST_SETTINGS_FILENAME.
    
    gdb/testsuite/ChangeLog:
    2019-07-03  Pedro Alves  <palves@redhat.com>
    
    	* gdb.base/settings.exp (test-string): Adjust expected out when
    	testing "maint test-settings show filename"

Diff:
---
 gdb/ChangeLog                       | 11 +++++++++++
 gdb/maint-test-settings.c           | 16 +++++++++++++---
 gdb/testsuite/ChangeLog             |  5 +++++
 gdb/testsuite/gdb.base/settings.exp |  9 ++++++---
 4 files changed, 35 insertions(+), 6 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d50fe89..05c25b4 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,14 @@
+2019-07-03  Pedro Alves  <palves@redhat.com>
+
+	* maint-test-settings.c (maintenance_test_settings_xxx)
+	(maintenance_test_settings_yyy, maintenance_test_settings_zzz):
+	New.
+	(maintenance_test_settings_enums): Use them.
+	(maintenance_test_settings_enum): Default to
+	maintenance_test_settings_xxx.
+	(_initialize_maint_test_settings): Initialize
+	MAINTENANCE_TEST_SETTINGS_FILENAME.
+
 2019-07-02  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* breakpoint.h (remove_breakpoints_inf): Change return type to
diff --git a/gdb/maint-test-settings.c b/gdb/maint-test-settings.c
index fa13519..79e002e 100644
--- a/gdb/maint-test-settings.c
+++ b/gdb/maint-test-settings.c
@@ -85,14 +85,22 @@ static char *maintenance_test_settings_optional_filename;
 
 static char *maintenance_test_settings_filename;
 
-static const char *maintenance_test_settings_enum;
-
 /* Enum values for the "maintenance test-settings set/show boolean"
    commands.  */
+static const char maintenance_test_settings_xxx[] = "xxx";
+static const char maintenance_test_settings_yyy[] = "yyy";
+static const char maintenance_test_settings_zzz[] = "zzz";
+
 static const char *const maintenance_test_settings_enums[] = {
-  "xxx", "yyy", "zzz", nullptr
+  maintenance_test_settings_xxx,
+  maintenance_test_settings_yyy,
+  maintenance_test_settings_zzz,
+  nullptr
 };
 
+static const char *maintenance_test_settings_enum
+  = maintenance_test_settings_xxx;
+
 /* The "maintenance test-options show xxx" commands.  */
 
 static void
@@ -107,6 +115,8 @@ maintenance_test_settings_show_value_cmd
 void
 _initialize_maint_test_settings (void)
 {
+  maintenance_test_settings_filename = xstrdup ("/foo/bar");
+
   add_prefix_cmd ("test-settings", no_class,
 		  maintenance_test_settings_cmd,
 		  _("\
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index f38efbe..9129c11 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-07-03  Pedro Alves  <palves@redhat.com>
+
+	* gdb.base/settings.exp (test-string): Adjust expected out when
+	testing "maint test-settings show filename"
+
 2019-07-02  Pedro Alves  <palves@redhat.com>
 
 	* gdb.base/options.exp (test-info-threads): New procedure.
diff --git a/gdb/testsuite/gdb.base/settings.exp b/gdb/testsuite/gdb.base/settings.exp
index aeca67c..b691ad8 100644
--- a/gdb/testsuite/gdb.base/settings.exp
+++ b/gdb/testsuite/gdb.base/settings.exp
@@ -447,9 +447,12 @@ proc test-string {variant} {
     set set_cmd "maint test-settings set $variant"
     set show_cmd "maint test-settings show $variant"
 
-    # Empty string.  Also checks that gdb doesn't crash if we haven't
-    # set the string yet.
-    gdb_test "$show_cmd" "^$show_cmd\r\n" "$show_cmd: empty first time"
+    # Checks that gdb doesn't crash if we haven't set the string yet.
+    if {$variant != "filename"} {
+	gdb_test "$show_cmd" "^$show_cmd\r\n" "$show_cmd: show default"
+    } else {
+	gdb_test "$show_cmd" "/foo/bar" "$show_cmd: show default"
+    }
 
     # A string value.
     gdb_test_no_output "$set_cmd hello world"