pythongh-112536: Define MI_TSAN to 1 for --with-mimalloc and --with-thread-sanitizer

Author: corona10

configure

@@ -4750,6 +4750,12 @@ elif test "$disable_gil" = "yes"; then
   AC_MSG_ERROR([--disable-gil requires mimalloc memory allocator (--with-mimalloc).])
 fi
 
+if test "$with_mimalloc" = yes; then
+  if test "$with_tsan" = yes; then
+    AC_DEFINE([MI_TSAN], [1], [Define MI_TSAN for thread sanitizer])
+  fi
+fi
+
 AC_MSG_RESULT([$with_mimalloc])
 AC_SUBST([WITH_MIMALLOC])
 AC_SUBST([MIMALLOC_HEADERS])

configure.ac

@@ -1588,6 +1588,9 @@
    <sysmacros.h>. */
 #undef MAJOR_IN_SYSMACROS
 
+/* Define MI_TSAN for thread sanitizer */
+#undef MI_TSAN
+
 /* Define if mvwdelch in curses.h is an expression. */
 #undef MVWDELCH_IS_EXPRESSION