From 34f77a498c86dc9953a487c34aecfbc29622d202 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ciro=20Santilli=20=E5=85=AD=E5=9B=9B=E4=BA=8B=E4=BB=B6=20?=
 =?UTF-8?q?=E6=B3=95=E8=BD=AE=E5=8A=9F?= <ciro.santilli@gmail.com>
Date: Tue, 22 Jan 2019 00:00:00 +0000
Subject: [PATCH] test-gdb: allow running just one test

---
 README.adoc |  2 +-
 test-gdb    | 35 +++++++++++++++++++++++++----------
 2 files changed, 26 insertions(+), 11 deletions(-)

diff --git a/README.adoc b/README.adoc
index d4db3aa..57bb473 100644
--- a/README.adoc
+++ b/README.adoc
@@ -11892,7 +11892,7 @@ Sources:
 * link:build-test-gdb[]
 * link:test-gdb[]
 
-If something goes wrong, re-run the test commands manually and use `--verbose` to understand what happened:
+If a test fails, re-run the test commands manually and use `--verbose` to understand what happened:
 
 ....
 ./run --arch arm --background --baremetal add --wait-gdb &
diff --git a/test-gdb b/test-gdb
index 6ffe179..cfde9f2 100755
--- a/test-gdb
+++ b/test-gdb
@@ -6,23 +6,38 @@ import os
 import common
 
 class Main(common.LkmcCliFunction):
+    def __init__(self):
+        super().__init__()
+        self.add_argument(
+            'tests',
+            metavar='tests',
+            nargs='*',
+            help='''\
+If given, run only the given tests. Otherwise, run all tests,
+found by searching for the Python test files.
+'''
+        )
+
     def timed_main(self):
         run = self.import_path('run').Main()
         run_gdb = self.import_path('run-gdb').Main()
         for emulator in self.env['emulators']:
             if self.env['arch'] in self.env['crosstool_ng_supported_archs']:
-                test_scripts_noext = []
-                for f in os.listdir(self.env['baremetal_src_dir']):
-                    base, ext = os.path.splitext(f)
-                    if ext == '.py':
-                        test_scripts_noext.append(base)
-                for root, dirs, files in os.walk(os.path.join(self.env['baremetal_src_dir'], 'arch', self.env['arch'])):
-                    for f in files:
+                if self.env['tests'] == []:
+                    test_scripts_noext = []
+                    for f in os.listdir(self.env['baremetal_src_dir']):
                         base, ext = os.path.splitext(f)
                         if ext == '.py':
-                            full_path = os.path.join(root, base)
-                            relpath = os.path.relpath(full_path, self.env['baremetal_src_dir'])
-                            test_scripts_noext.append(relpath)
+                            test_scripts_noext.append(base)
+                    for root, dirs, files in os.walk(os.path.join(self.env['baremetal_src_dir'], 'arch', self.env['arch'])):
+                        for f in files:
+                            base, ext = os.path.splitext(f)
+                            if ext == '.py':
+                                full_path = os.path.join(root, base)
+                                relpath = os.path.relpath(full_path, self.env['baremetal_src_dir'])
+                                test_scripts_noext.append(relpath)
+                else:
+                    test_scripts_noext = self.env['tests']
                 for test_script_noext in test_scripts_noext:
                     run_thread = threading.Thread(target=lambda: run(
                         archs=[self.env['arch']],