tests/windows/16: Use pefile module instead of objdump/dumpbin

The pefile module is a CI dependency now, so we can use that instead
of objdump/dumpbin which greatly simplifies the test. Of course, this
module is also cross-platform so it will work if we add cross-win32 CI
at some point.

test cases/windows/16 gui app/gui_app_tester.py

@@ -1,26 +1,19 @@
 #!/usr/bin/env python3
 
-import re
-import subprocess
+import os
 import sys
+try:
+    import pefile
+except ImportError:
+    if 'CI' in os.environ:
+        raise
+    # Skip the test if not on CI
+    sys.exit(77)
 
-tool = sys.argv[1]
-executable = sys.argv[2]
-expected = int(sys.argv[3])
-actual = -1
+executable = sys.argv[1]
+expected = int(sys.argv[2])
 
-if 'objdump' in tool:
-    result = subprocess.check_output([tool, '-p', executable]).decode()
-    match = re.search(r'^Subsystem\s+(\d+)', result, re.MULTILINE)
-elif 'dumpbin' in tool:
-    result = subprocess.check_output([tool, '/headers', executable]).decode()
-    match = re.search(r'^\s*(\d+) subsystem(?! version)', result, re.MULTILINE)
-else:
-    print('unknown tool')
-    sys.exit(1)
-
-if match:
-    actual = int(match.group(1))
+actual = pefile.PE(executable).dump_dict()['OPTIONAL_HEADER']['Subsystem']['Value']
 
 print('subsystem expected: %d, actual: %d' % (expected, actual))
 sys.exit(0 if (expected == actual) else 1)

test cases/windows/16 gui app/meson.build

@@ -17,10 +17,5 @@ console_prog = executable('console_prog', 'console_prog.c', gui_app: false)
 
 tester = find_program('gui_app_tester.py')
 
-tool = find_program('objdump', 'dumpbin', required: false)
-# TODO: when 'llvm-objdump -f' emits the subsystem type, we could use that also
-
-if tool.found()
-  test('is_gui', tester, args: [tool.path(), gui_prog, '2'])
-  test('not_gui', tester, args: [tool.path(), console_prog, '3'])
-endif
+test('is_gui', tester, args: [gui_prog, '2'])
+test('not_gui', tester, args: [console_prog, '3'])