python · benjaminp · Dec 31, 2017 · Dec 31, 2017
diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
@@ -116,10 +116,10 @@ bytes(cdata)
 #endif
 #include "ctypes.h"
 
-PyObject *PyExc_ArgError;
+PyObject *PyExc_ArgError = NULL;
 
 /* This dict maps ctypes types to POINTER types */
-PyObject *_ctypes_ptrtype_cache;
+PyObject *_ctypes_ptrtype_cache = NULL;
 
 static PyTypeObject Simple_Type;
 

diff --git a/Modules/_ctypes/_ctypes_test.c b/Modules/_ctypes/_ctypes_test.c
@@ -63,7 +63,7 @@ typedef struct {
 } TestReg;
 
 
-EXPORT(TestReg) last_tfrsuv_arg;
+EXPORT(TestReg) last_tfrsuv_arg = {0};
 
 
 EXPORT(void)
@@ -410,8 +410,8 @@ EXPORT(void) _py_func(void)
 {
 }
 
-EXPORT(long long) last_tf_arg_s;
-EXPORT(unsigned long long) last_tf_arg_u;
+EXPORT(long long) last_tf_arg_s = 0;
+EXPORT(unsigned long long) last_tf_arg_u = 0;
 
 struct BITS {
     int A: 1, B:2, C:3, D:4, E: 5, F: 6, G: 7, H: 8, I: 9;

diff --git a/Modules/_io/_iomodule.c b/Modules/_io/_iomodule.c
@@ -26,33 +26,33 @@
 
 /* Various interned strings */
 
-PyObject *_PyIO_str_close;
-PyObject *_PyIO_str_closed;
-PyObject *_PyIO_str_decode;
-PyObject *_PyIO_str_encode;
-PyObject *_PyIO_str_fileno;
-PyObject *_PyIO_str_flush;
-PyObject *_PyIO_str_getstate;
-PyObject *_PyIO_str_isatty;
-PyObject *_PyIO_str_newlines;
-PyObject *_PyIO_str_nl;
-PyObject *_PyIO_str_read;
-PyObject *_PyIO_str_read1;
-PyObject *_PyIO_str_readable;
-PyObject *_PyIO_str_readall;
-PyObject *_PyIO_str_readinto;
-PyObject *_PyIO_str_readline;
-PyObject *_PyIO_str_reset;
-PyObject *_PyIO_str_seek;
-PyObject *_PyIO_str_seekable;
-PyObject *_PyIO_str_setstate;
-PyObject *_PyIO_str_tell;
-PyObject *_PyIO_str_truncate;
-PyObject *_PyIO_str_writable;
-PyObject *_PyIO_str_write;
-
-PyObject *_PyIO_empty_str;
-PyObject *_PyIO_empty_bytes;
+PyObject *_PyIO_str_close = NULL;
+PyObject *_PyIO_str_closed = NULL;
+PyObject *_PyIO_str_decode = NULL;
+PyObject *_PyIO_str_encode = NULL;
+PyObject *_PyIO_str_fileno = NULL;
+PyObject *_PyIO_str_flush = NULL;
+PyObject *_PyIO_str_getstate = NULL;
+PyObject *_PyIO_str_isatty = NULL;
+PyObject *_PyIO_str_newlines = NULL;
+PyObject *_PyIO_str_nl = NULL;
+PyObject *_PyIO_str_read = NULL;
+PyObject *_PyIO_str_read1 = NULL;
+PyObject *_PyIO_str_readable = NULL;
+PyObject *_PyIO_str_readall = NULL;
+PyObject *_PyIO_str_readinto = NULL;
+PyObject *_PyIO_str_readline = NULL;
+PyObject *_PyIO_str_reset = NULL;
+PyObject *_PyIO_str_seek = NULL;
+PyObject *_PyIO_str_seekable = NULL;
+PyObject *_PyIO_str_setstate = NULL;
+PyObject *_PyIO_str_tell = NULL;
+PyObject *_PyIO_str_truncate = NULL;
+PyObject *_PyIO_str_writable = NULL;
+PyObject *_PyIO_str_write = NULL;
+
+PyObject *_PyIO_empty_str = NULL;
+PyObject *_PyIO_empty_bytes = NULL;
 
 PyDoc_STRVAR(module_doc,
 "The io module provides the Python interfaces to stream handling. The\n"

diff --git a/Modules/_sqlite/microprotocols.c b/Modules/_sqlite/microprotocols.c
@@ -33,7 +33,7 @@
 
 /** the adapters registry **/
 
-PyObject *psyco_adapters;
+static PyObject *psyco_adapters = NULL;
 
 /* pysqlite_microprotocols_init - initialize the adapters dictionary */
 

diff --git a/Modules/_sqlite/microprotocols.h b/Modules/_sqlite/microprotocols.h
@@ -28,10 +28,6 @@
 
 #include <Python.h>
 
-/** adapters registry **/
-
-extern PyObject *psyco_adapters;
-
 /** the names of the three mandatory methods **/
 
 #define MICROPROTOCOLS_GETQUOTED_NAME "getquoted"

diff --git a/Modules/_sqlite/module.c b/Modules/_sqlite/module.c
@@ -35,13 +35,20 @@
 
 /* static objects at module-level */
 
-PyObject* pysqlite_Error, *pysqlite_Warning, *pysqlite_InterfaceError, *pysqlite_DatabaseError,
-    *pysqlite_InternalError, *pysqlite_OperationalError, *pysqlite_ProgrammingError,
-    *pysqlite_IntegrityError, *pysqlite_DataError, *pysqlite_NotSupportedError;
-
-PyObject* converters;
-int _enable_callback_tracebacks;
-int pysqlite_BaseTypeAdapted;
+PyObject *pysqlite_Error = NULL;
+PyObject *pysqlite_Warning = NULL;
+PyObject *pysqlite_InterfaceError = NULL;
+PyObject *pysqlite_DatabaseError = NULL;
+PyObject *pysqlite_InternalError = NULL;
+PyObject *pysqlite_OperationalError = NULL;
+PyObject *pysqlite_ProgrammingError = NULL;
+PyObject *pysqlite_IntegrityError = NULL;
+PyObject *pysqlite_DataError = NULL;
+PyObject *pysqlite_NotSupportedError = NULL;
+
+PyObject* converters = NULL;
+int _enable_callback_tracebacks = 0;
+int pysqlite_BaseTypeAdapted = 0;
 
 static PyObject* module_connect(PyObject* self, PyObject* args, PyObject*
         kwargs)
@@ -461,10 +468,6 @@ PyMODINIT_FUNC PyInit__sqlite3(void)
     /* initialize the default converters */
     converters_init(dict);
 
-    _enable_callback_tracebacks = 0;
-
-    pysqlite_BaseTypeAdapted = 0;
-
 error:
     if (PyErr_Occurred())
     {

diff --git a/Parser/myreadline.c b/Parser/myreadline.c
@@ -17,7 +17,7 @@
 #endif /* MS_WINDOWS */
 
 
-PyThreadState* _PyOS_ReadlineTState;
+PyThreadState* _PyOS_ReadlineTState = NULL;
 
 #include "pythread.h"
 static PyThread_type_lock _PyOS_ReadlineLock = NULL;
@@ -284,7 +284,7 @@ PyOS_StdioReadline(FILE *sys_stdin, FILE *sys_stdout, const char *prompt)
 
    Note: Python expects in return a buffer allocated with PyMem_Malloc. */
 
-char *(*PyOS_ReadlineFunctionPointer)(FILE *, FILE *, const char *);
+char *(*PyOS_ReadlineFunctionPointer)(FILE *, FILE *, const char *) = NULL;
 
 
 /* Interface used by tokenizer.c and bltinmodule.c */

diff --git a/Python/pyhash.c b/Python/pyhash.c
@@ -17,7 +17,7 @@
 extern "C" {
 #endif
 
-_Py_HashSecret_t _Py_HashSecret;
+_Py_HashSecret_t _Py_HashSecret = {0};
 
 #if Py_HASH_ALGORITHM == Py_HASH_EXTERNAL
 extern PyHash_FuncDef PyHash_Func;

diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
@@ -108,17 +108,17 @@ _Py_IsFinalizing(void)
 
 /* Global configuration variable declarations are in pydebug.h */
 /* XXX (ncoghlan): move those declarations to pylifecycle.h? */
-int Py_DebugFlag; /* Needed by parser.c */
-int Py_VerboseFlag; /* Needed by import.c */
-int Py_QuietFlag; /* Needed by sysmodule.c */
-int Py_InteractiveFlag; /* Needed by Py_FdIsInteractive() below */
-int Py_InspectFlag; /* Needed to determine whether to exit at SystemExit */
+int Py_DebugFlag = 0; /* Needed by parser.c */
+int Py_VerboseFlag = 0; /* Needed by import.c */
+int Py_QuietFlag = 0; /* Needed by sysmodule.c */
+int Py_InteractiveFlag = 0; /* Needed by Py_FdIsInteractive() below */
+int Py_InspectFlag = 0; /* Needed to determine whether to exit at SystemExit */
 int Py_OptimizeFlag = 0; /* Needed by compile.c */
-int Py_NoSiteFlag; /* Suppress 'import site' */
-int Py_BytesWarningFlag; /* Warn on str(bytes) and str(buffer) */
-int Py_FrozenFlag; /* Needed by getpath.c */
-int Py_IgnoreEnvironmentFlag; /* e.g. PYTHONPATH, PYTHONHOME */
-int Py_DontWriteBytecodeFlag; /* Suppress writing bytecode files (*.pyc) */
+int Py_NoSiteFlag = 0; /* Suppress 'import site' */
+int Py_BytesWarningFlag = 0; /* Warn on str(bytes) and str(buffer) */
+int Py_FrozenFlag = 0; /* Needed by getpath.c */
+int Py_IgnoreEnvironmentFlag = 0; /* e.g. PYTHONPATH, PYTHONHOME */
+int Py_DontWriteBytecodeFlag = 0; /* Suppress writing bytecode files (*.pyc) */
 int Py_NoUserSiteDirectory = 0; /* for -s and site.py */
 int Py_UnbufferedStdioFlag = 0; /* Unbuffered binary std{in,out,err} */
 int Py_HashRandomizationFlag = 0; /* for -R and PYTHONHASHSEED */