https://github.com/python/cpython/commit/ea3a97f2458a204e6273936eabe18bd465f4ed24
commit: ea3a97f2458a204e6273936eabe18bd465f4ed24
branch: main
author: Pengyu Lee <[email protected]>
committer: StanFromIreland <[email protected]>
date: 2026-10-25T09:56:45Z
summary:
gh-157354: Honor `--with-<name>-sanitizer=no` and `--without-<name>-sanitizer`
in configure (#157355)
files:
A Misc/NEWS.d/next/Build/2026-09-12-15-33-26.gh-issue-157354.2hw6fe.rst
M Lib/test/support/__init__.py
M configure
M configure.ac
diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index 4f27a23b1a62b1..3744d6279e7b46 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -11,6 +11,7 @@
import _opcode
import os
import re
+import shlex
import stat
import sys
import sysconfig
@@ -469,27 +470,39 @@ def check_sanitizer(*, address=False, hwaddress=False,
memory=False, ub=False,
cflags = sysconfig.get_config_var('CFLAGS') or ''
- config_args = sysconfig.get_config_var('CONFIG_ARGS') or ''
+ config_args = shlex.split(sysconfig.get_config_var('CONFIG_ARGS') or '')
+
+ def configured_with_sanitizer(name):
+ with_option = f'--with-{name}-sanitizer'
+ without_option = f'--without-{name}-sanitizer'
+ enabled = False
+ for arg in config_args:
+ if arg == without_option or arg == f'{with_option}=no':
+ enabled = False
+ elif arg == with_option or arg.startswith(f'{with_option}='):
+ enabled = True
+ return enabled
+
memory_sanitizer = (
'-fsanitize=memory' in cflags or
- '--with-memory-sanitizer' in config_args
+ configured_with_sanitizer('memory')
)
hwaddress_sanitizer = (
'-fsanitize=hwaddress' in cflags or
- '--with-hwaddress-sanitizer' in config_args
+ configured_with_sanitizer('hwaddress')
)
address_sanitizer = (
'-fsanitize=address' in cflags or
- '--with-address-sanitizer' in config_args or
+ configured_with_sanitizer('address') or
hwaddress_sanitizer
)
ub_sanitizer = (
'-fsanitize=undefined' in cflags or
- '--with-undefined-behavior-sanitizer' in config_args
+ configured_with_sanitizer('undefined-behavior')
)
thread_sanitizer = (
'-fsanitize=thread' in cflags or
- '--with-thread-sanitizer' in config_args
+ configured_with_sanitizer('thread')
)
function_sanitizer = (
'-fsanitize=function' in cflags
diff --git
a/Misc/NEWS.d/next/Build/2026-09-12-15-33-26.gh-issue-157354.2hw6fe.rst
b/Misc/NEWS.d/next/Build/2026-09-12-15-33-26.gh-issue-157354.2hw6fe.rst
new file mode 100644
index 00000000000000..5bc35aaf9870c2
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2026-09-12-15-33-26.gh-issue-157354.2hw6fe.rst
@@ -0,0 +1,2 @@
+Fix the :samp:`--with-{name}-sanitizer=no` and
:samp:`--without-{name}-sanitizer`
+:program:`configure` options enabling the sanitizer instead of disabling it.
diff --git a/configure b/configure
index 7be33a6f69598f..1d745f45ca9333 100755
--- a/configure
+++ b/configure
@@ -14369,8 +14369,18 @@ printf %s "checking for --with-address-sanitizer... "
>&6; }
if test ${with_address_sanitizer+y}
then :
withval=$with_address_sanitizer;
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $withval" >&5
-printf "%s\n" "$withval" >&6; }
+else case e in #(
+ e) with_address_sanitizer=no ;;
+esac
+fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $with_address_sanitizer"
>&5
+printf "%s\n" "$with_address_sanitizer" >&6; }
+if test "x$with_address_sanitizer" = xno
+then :
+
+else case e in #(
+ e)
BASECFLAGS="-fsanitize=address -fno-omit-frame-pointer $BASECFLAGS"
LDFLAGS="-fsanitize=address $LDFLAGS"
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether a program links
with -fsanitize=address" >&5
@@ -14398,14 +14408,10 @@ esac
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam \
conftest$ac_exeext conftest.$ac_ext
-
-else case e in #(
- e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; } ;;
+ ;;
esac
fi
-
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for
--with-hwaddress-sanitizer" >&5
printf %s "checking for --with-hwaddress-sanitizer... " >&6; }
@@ -14413,8 +14419,18 @@ printf %s "checking for --with-hwaddress-sanitizer...
" >&6; }
if test ${with_hwaddress_sanitizer+y}
then :
withval=$with_hwaddress_sanitizer;
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $withval" >&5
-printf "%s\n" "$withval" >&6; }
+else case e in #(
+ e) with_hwaddress_sanitizer=no ;;
+esac
+fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result:
$with_hwaddress_sanitizer" >&5
+printf "%s\n" "$with_hwaddress_sanitizer" >&6; }
+if test "x$with_hwaddress_sanitizer" = xno
+then :
+
+else case e in #(
+ e)
hwasan_flags="-fsanitize=hwaddress"
# x86-64 lacks address tagging, so HWASan needs the page aliasing mode there.
# See gh-156049 and
@@ -14453,14 +14469,10 @@ esac
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam \
conftest$ac_exeext conftest.$ac_ext
-
-else case e in #(
- e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; } ;;
+ ;;
esac
fi
-
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for
--with-memory-sanitizer" >&5
printf %s "checking for --with-memory-sanitizer... " >&6; }
@@ -14468,8 +14480,18 @@ printf %s "checking for --with-memory-sanitizer... "
>&6; }
if test ${with_memory_sanitizer+y}
then :
withval=$with_memory_sanitizer;
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $withval" >&5
-printf "%s\n" "$withval" >&6; }
+else case e in #(
+ e) with_memory_sanitizer=no ;;
+esac
+fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $with_memory_sanitizer"
>&5
+printf "%s\n" "$with_memory_sanitizer" >&6; }
+if test "x$with_memory_sanitizer" = xno
+then :
+
+else case e in #(
+ e)
BASECFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2
-fno-omit-frame-pointer $BASECFLAGS"
LDFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 $LDFLAGS"
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether a program links
with -fsanitize=memory" >&5
@@ -14497,14 +14519,10 @@ esac
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam \
conftest$ac_exeext conftest.$ac_ext
-
-else case e in #(
- e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; } ;;
+ ;;
esac
fi
-
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for
--with-undefined-behavior-sanitizer" >&5
printf %s "checking for --with-undefined-behavior-sanitizer... " >&6; }
@@ -14512,8 +14530,20 @@ printf %s "checking for
--with-undefined-behavior-sanitizer... " >&6; }
if test ${with_undefined_behavior_sanitizer+y}
then :
withval=$with_undefined_behavior_sanitizer;
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $withval" >&5
-printf "%s\n" "$withval" >&6; }
+else case e in #(
+ e) with_undefined_behavior_sanitizer=no ;;
+esac
+fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result:
$with_undefined_behavior_sanitizer" >&5
+printf "%s\n" "$with_undefined_behavior_sanitizer" >&6; }
+if test "x$with_undefined_behavior_sanitizer" = xno
+then :
+
+with_ubsan="no"
+
+else case e in #(
+ e)
BASECFLAGS="-fsanitize=undefined $BASECFLAGS"
LDFLAGS="-fsanitize=undefined $LDFLAGS"
with_ubsan="yes"
@@ -14542,17 +14572,10 @@ esac
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam \
conftest$ac_exeext conftest.$ac_ext
-
-else case e in #(
- e)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
-with_ubsan="no"
;;
esac
fi
-
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for
--with-thread-sanitizer" >&5
printf %s "checking for --with-thread-sanitizer... " >&6; }
@@ -14560,8 +14583,20 @@ printf %s "checking for --with-thread-sanitizer... "
>&6; }
if test ${with_thread_sanitizer+y}
then :
withval=$with_thread_sanitizer;
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $withval" >&5
-printf "%s\n" "$withval" >&6; }
+else case e in #(
+ e) with_thread_sanitizer=no ;;
+esac
+fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $with_thread_sanitizer"
>&5
+printf "%s\n" "$with_thread_sanitizer" >&6; }
+if test "x$with_thread_sanitizer" = xno
+then :
+
+with_tsan="no"
+
+else case e in #(
+ e)
BASECFLAGS="-fsanitize=thread $BASECFLAGS"
LDFLAGS="-fsanitize=thread $LDFLAGS"
with_tsan="yes"
@@ -14590,17 +14625,10 @@ esac
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam \
conftest$ac_exeext conftest.$ac_ext
-
-else case e in #(
- e)
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
-with_tsan="no"
;;
esac
fi
-
# Set info about shared libraries.
diff --git a/configure.ac b/configure.ac
index d92afe2751d9a4..df4a7494ecd87e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3728,8 +3728,9 @@ AC_MSG_CHECKING([for --with-address-sanitizer])
AC_ARG_WITH([address_sanitizer],
AS_HELP_STRING([--with-address-sanitizer],
[enable AddressSanitizer memory error detector,
'asan' (default is no)]),
-[
-AC_MSG_RESULT([$withval])
+[], [with_address_sanitizer=no])
+AC_MSG_RESULT([$with_address_sanitizer])
+AS_VAR_IF([with_address_sanitizer], [no], [], [
BASECFLAGS="-fsanitize=address -fno-omit-frame-pointer $BASECFLAGS"
LDFLAGS="-fsanitize=address $LDFLAGS"
AC_MSG_CHECKING([whether a program links with -fsanitize=address])
@@ -3737,8 +3738,7 @@ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
AC_MSG_ERROR([cannot link with -fsanitize=address: the compiler does not
support AddressSanitizer or its runtime library is not installed; see
config.log])])
-],
-[AC_MSG_RESULT([no])])
+])
AC_MSG_CHECKING([for --with-hwaddress-sanitizer])
AC_ARG_WITH(
@@ -3747,8 +3747,9 @@ AC_ARG_WITH(
[--with-hwaddress-sanitizer],
[enable HWAddressSanitizer memory error detector, 'hwasan' (default is no)]
)],
-[
-AC_MSG_RESULT([$withval])
+[], [with_hwaddress_sanitizer=no])
+AC_MSG_RESULT([$with_hwaddress_sanitizer])
+AS_VAR_IF([with_hwaddress_sanitizer], [no], [], [
hwasan_flags="-fsanitize=hwaddress"
# x86-64 lacks address tagging, so HWASan needs the page aliasing mode there.
# See gh-156049 and
@@ -3763,8 +3764,7 @@ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
AC_MSG_ERROR([cannot link with $hwasan_flags: the compiler does not support
HWAddressSanitizer or its runtime library is not installed; see config.log])])
-],
-[AC_MSG_RESULT([no])])
+])
AC_MSG_CHECKING([for --with-memory-sanitizer])
AC_ARG_WITH(
@@ -3773,8 +3773,9 @@ AC_ARG_WITH(
[--with-memory-sanitizer],
[enable MemorySanitizer allocation error detector, 'msan' (default is no)]
)],
-[
-AC_MSG_RESULT([$withval])
+[], [with_memory_sanitizer=no])
+AC_MSG_RESULT([$with_memory_sanitizer])
+AS_VAR_IF([with_memory_sanitizer], [no], [], [
BASECFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2
-fno-omit-frame-pointer $BASECFLAGS"
LDFLAGS="-fsanitize=memory -fsanitize-memory-track-origins=2 $LDFLAGS"
AC_MSG_CHECKING([whether a program links with -fsanitize=memory])
@@ -3782,8 +3783,7 @@ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
AC_MSG_ERROR([cannot link with -fsanitize=memory: the compiler does not
support MemorySanitizer or its runtime library is not installed; see
config.log])])
-],
-[AC_MSG_RESULT([no])])
+])
AC_MSG_CHECKING([for --with-undefined-behavior-sanitizer])
AC_ARG_WITH(
@@ -3792,8 +3792,11 @@ AC_ARG_WITH(
[--with-undefined-behavior-sanitizer],
[enable UndefinedBehaviorSanitizer undefined behaviour detector, 'ubsan'
(default is no)]
)],
-[
-AC_MSG_RESULT([$withval])
+[], [with_undefined_behavior_sanitizer=no])
+AC_MSG_RESULT([$with_undefined_behavior_sanitizer])
+AS_VAR_IF([with_undefined_behavior_sanitizer], [no], [
+with_ubsan="no"
+], [
BASECFLAGS="-fsanitize=undefined $BASECFLAGS"
LDFLAGS="-fsanitize=undefined $LDFLAGS"
with_ubsan="yes"
@@ -3802,10 +3805,6 @@ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
AC_MSG_ERROR([cannot link with -fsanitize=undefined: the compiler does not
support UndefinedBehaviorSanitizer or its runtime library is not installed; see
config.log])])
-],
-[
-AC_MSG_RESULT([no])
-with_ubsan="no"
])
AC_MSG_CHECKING([for --with-thread-sanitizer])
@@ -3815,8 +3814,11 @@ AC_ARG_WITH(
[--with-thread-sanitizer],
[enable ThreadSanitizer data race detector, 'tsan' (default is no)]
)],
-[
-AC_MSG_RESULT([$withval])
+[], [with_thread_sanitizer=no])
+AC_MSG_RESULT([$with_thread_sanitizer])
+AS_VAR_IF([with_thread_sanitizer], [no], [
+with_tsan="no"
+], [
BASECFLAGS="-fsanitize=thread $BASECFLAGS"
LDFLAGS="-fsanitize=thread $LDFLAGS"
with_tsan="yes"
@@ -3825,10 +3827,6 @@ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
AC_MSG_ERROR([cannot link with -fsanitize=thread: the compiler does not
support ThreadSanitizer or its runtime library is not installed; see
config.log])])
-],
-[
-AC_MSG_RESULT([no])
-with_tsan="no"
])
# Set info about shared libraries.
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