[Python-checkins] bpo-45189: Drop the "list_frozen" command from _test_embed. (GH-30273)

[corona10]

https://github.com/python/cpython/commit/196b53eb1e62871ca80dee180e4891b4dd5c52ac
commit: 196b53eb1e62871ca80dee180e4891b4dd5c52ac
branch: main
author: Dong-hee Na <donghee.na at python.org>
committer: corona10 <donghee.na92 at gmail.com>
date: 2021-12-28T11:05:50+09:00
summary:

bpo-45189: Drop the "list_frozen" command from _test_embed. (GH-30273)

files:
M Programs/_testembed.c
M Tools/scripts/generate_stdlib_module_names.py

diff --git a/Programs/_testembed.c b/Programs/_testembed.c
index fc5f44d5eb626..b31781938eb39 100644
--- a/Programs/_testembed.c
+++ b/Programs/_testembed.c
@@ -1827,26 +1827,6 @@ static int test_frozenmain(void)
 }
 #endif  // !MS_WINDOWS
 
-
-// List frozen modules.
-// Command used by Tools/scripts/generate_stdlib_module_names.py script.
-static int list_frozen(void)
-{
-    const struct _frozen *p;
-    for (p = _PyImport_FrozenBootstrap; ; p++) {
-        if (p->name == NULL)
-            break;
-        printf("%s\n", p->name);
-    }
-    for (p = _PyImport_FrozenStdlib; ; p++) {
-        if (p->name == NULL)
-            break;
-        printf("%s\n", p->name);
-    }
-    return 0;
-}
-
-
 static int test_repeated_init_and_inittab(void)
 {
     // bpo-44441: Py_RunMain() must reset PyImport_Inittab at exit.
@@ -1960,8 +1940,6 @@ static struct TestCase TestCases[] = {
     {"test_frozenmain", test_frozenmain},
 #endif
 
-    // Command
-    {"list_frozen", list_frozen},
     {NULL, NULL}
 };
 
diff --git a/Tools/scripts/generate_stdlib_module_names.py b/Tools/scripts/generate_stdlib_module_names.py
index 3e896ba737543..fe1e429ebce17 100644
--- a/Tools/scripts/generate_stdlib_module_names.py
+++ b/Tools/scripts/generate_stdlib_module_names.py
@@ -1,5 +1,6 @@
 # This script lists the names of standard library modules
 # to update Python/stdlib_mod_names.h
+import _imp
 import os.path
 import re
 import subprocess
@@ -11,7 +12,6 @@
 STDLIB_PATH = os.path.join(SRC_DIR, 'Lib')
 MODULES_SETUP = os.path.join(SRC_DIR, 'Modules', 'Setup')
 SETUP_PY = os.path.join(SRC_DIR, 'setup.py')
-TEST_EMBED = os.path.join(SRC_DIR, 'Programs', '_testembed')
 
 IGNORE = {
     '__init__',
@@ -117,16 +117,11 @@ def list_modules_setup_extensions(names):
 # List frozen modules of the PyImport_FrozenModules list (Python/frozen.c).
 # Use the "./Programs/_testembed list_frozen" command.
 def list_frozen(names):
-    args = [TEST_EMBED, 'list_frozen']
-    proc = subprocess.run(args, stdout=subprocess.PIPE, text=True)
-    exitcode = proc.returncode
-    if exitcode:
-        cmd = ' '.join(args)
-        print(f"{cmd} failed with exitcode {exitcode}")
-        sys.exit(exitcode)
     submodules = set()
-    for line in proc.stdout.splitlines():
-        name = line.strip()
+    for name in _imp._frozen_module_names():
+        # To skip __hello__, __hello_alias__ and etc.
+        if name.startswith('__'):
+            continue
         if '.' in name:
             submodules.add(name)
         else: