bpo-39489: Remove COUNT_ALLOCS special build (GH-18259)

Remove:

* COUNT_ALLOCS macro
* sys.getcounts() function
* SHOW_ALLOC_COUNT code in listobject.c
* SHOW_TRACK_COUNT code in tupleobject.c
* PyConfig.show_alloc_count field
* -X showalloccount command line option
* @test.support.requires_type_collecting decorator

Python/clinic/sysmodule.c.h

@@ -758,27 +758,6 @@ exit:
     return return_value;
 }
 
-#if defined(COUNT_ALLOCS)
-
-PyDoc_STRVAR(sys_getcounts__doc__,
-"getcounts($module, /)\n"
-"--\n"
-"\n");
-
-#define SYS_GETCOUNTS_METHODDEF    \
-    {"getcounts", (PyCFunction)sys_getcounts, METH_NOARGS, sys_getcounts__doc__},
-
-static PyObject *
-sys_getcounts_impl(PyObject *module);
-
-static PyObject *
-sys_getcounts(PyObject *module, PyObject *Py_UNUSED(ignored))
-{
-    return sys_getcounts_impl(module);
-}
-
-#endif /* defined(COUNT_ALLOCS) */
-
 PyDoc_STRVAR(sys__getframe__doc__,
 "_getframe($module, depth=0, /)\n"
 "--\n"
@@ -988,11 +967,7 @@ sys_getandroidapilevel(PyObject *module, PyObject *Py_UNUSED(ignored))
     #define SYS_GETTOTALREFCOUNT_METHODDEF
 #endif /* !defined(SYS_GETTOTALREFCOUNT_METHODDEF) */
 
-#ifndef SYS_GETCOUNTS_METHODDEF
-    #define SYS_GETCOUNTS_METHODDEF
-#endif /* !defined(SYS_GETCOUNTS_METHODDEF) */
-
 #ifndef SYS_GETANDROIDAPILEVEL_METHODDEF
     #define SYS_GETANDROIDAPILEVEL_METHODDEF
 #endif /* !defined(SYS_GETANDROIDAPILEVEL_METHODDEF) */
-/*[clinic end generated code: output=decd687b7631de4b input=a9049054013a1b77]*/
+/*[clinic end generated code: output=39eb34a01fb9a919 input=a9049054013a1b77]*/

Python/initconfig.c

@@ -73,9 +73,6 @@ static const char usage_3[] = "\
              tracemalloc module. By default, only the most recent frame is stored in a\n\
              traceback of a trace. Use -X tracemalloc=NFRAME to start tracing with a\n\
              traceback limit of NFRAME frames\n\
-         -X showalloccount: output the total count of allocated objects for each\n\
-             type when the program finishes. This only works when Python was built with\n\
-             COUNT_ALLOCS defined\n\
          -X importtime: show how long each import takes. It shows module name,\n\
              cumulative time (including nested imports) and self time (excluding\n\
              nested imports). Note that its output may be broken in multi-threaded\n\
@@ -800,7 +797,6 @@ _PyConfig_Copy(PyConfig *config, const PyConfig *config2)
     COPY_ATTR(tracemalloc);
     COPY_ATTR(import_time);
     COPY_ATTR(show_ref_count);
-    COPY_ATTR(show_alloc_count);
     COPY_ATTR(dump_refs);
     COPY_ATTR(malloc_stats);
 
@@ -903,7 +899,6 @@ config_as_dict(const PyConfig *config)
     SET_ITEM_INT(tracemalloc);
     SET_ITEM_INT(import_time);
     SET_ITEM_INT(show_ref_count);
-    SET_ITEM_INT(show_alloc_count);
     SET_ITEM_INT(dump_refs);
     SET_ITEM_INT(malloc_stats);
     SET_ITEM_WSTR(filesystem_encoding);
@@ -1691,9 +1686,6 @@ config_read(PyConfig *config)
     if (config_get_xoption(config, L"showrefcount")) {
         config->show_ref_count = 1;
     }
-    if (config_get_xoption(config, L"showalloccount")) {
-        config->show_alloc_count = 1;
-    }
 
     status = config_read_complex_options(config);
     if (_PyStatus_EXCEPTION(status)) {

Python/pylifecycle.c

@@ -1173,10 +1173,6 @@ Py_Initialize(void)
 }
 
 
-#ifdef COUNT_ALLOCS
-extern void _Py_dump_counts(FILE*);
-#endif
-
 /* Flush stdout and stderr */
 
 static int
@@ -1393,13 +1389,6 @@ Py_FinalizeEx(void)
      * XXX I haven't seen a real-life report of either of these.
      */
     _PyGC_CollectIfEnabled();
-#ifdef COUNT_ALLOCS
-    /* With COUNT_ALLOCS, it helps to run GC multiple times:
-       each collection might release some types from the type
-       list, so they become garbage. */
-    while (_PyGC_CollectIfEnabled() > 0)
-        /* nothing */;
-#endif
 
     /* Clear all loghooks */
     /* We want minimal exposure of this function, so define the extern
@@ -1451,10 +1440,6 @@ Py_FinalizeEx(void)
     /* unload faulthandler module */
     _PyFaulthandler_Fini();
 
-    /* Debugging stuff */
-#ifdef COUNT_ALLOCS
-    _Py_dump_counts(stderr);
-#endif
     /* dump hash stats */
     _PyHash_Fini();
 

Python/sysmodule.c

@@ -1685,20 +1685,6 @@ sys_getallocatedblocks_impl(PyObject *module)
     return _Py_GetAllocatedBlocks();
 }
 
-#ifdef COUNT_ALLOCS
-/*[clinic input]
-sys.getcounts
-[clinic start generated code]*/
-
-static PyObject *
-sys_getcounts_impl(PyObject *module)
-/*[clinic end generated code: output=20df00bc164f43cb input=ad2ec7bda5424953]*/
-{
-    extern PyObject *_Py_get_counts(void);
-
-    return _Py_get_counts();
-}
-#endif
 
 /*[clinic input]
 sys._getframe
@@ -1879,7 +1865,6 @@ static PyMethodDef sys_methods[] = {
     SYS_GETDEFAULTENCODING_METHODDEF
     SYS_GETDLOPENFLAGS_METHODDEF
     SYS_GETALLOCATEDBLOCKS_METHODDEF
-    SYS_GETCOUNTS_METHODDEF
 #ifdef DYNAMIC_EXECUTION_PROFILE
     {"getdxp",          _Py_GetDXProfile, METH_VARARGS},
 #endif