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bpo-28411: Isolate PyInterpreterState.modules (#3575)

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A bunch of code currently uses PyInterpreterState.modules directly instead of PyImport_GetModuleDict(). This complicates efforts to make changes relative to sys.modules. This patch switches to using PyImport_GetModuleDict() uniformly. Also, a number of related uses of sys.modules are updated for uniformity for the same reason.

Note that this code was already reviewed and merged as part of #1638. I reverted that and am now splitting it up into more focused parts.
This commit is contained in:
Eric Snow 2017-09-14 12:18:12 -06:00 • committed by GitHub
parent 8dcf22f442
commit d393c1b227
10 changed files with 116 additions and 55 deletions
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4
Objects/typeobject.c
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@ -3902,7 +3902,6 @@ import_copyreg(void)
{
PyObject *copyreg_str;
PyObject *copyreg_module;
PyInterpreterState *interp = PyThreadState_GET()->interp;
_Py_IDENTIFIER(copyreg);
copyreg_str = _PyUnicode_FromId(&PyId_copyreg);
@ -3914,7 +3913,8 @@ import_copyreg(void)
by storing a reference to the cached module in a static variable, but
this broke when multiple embedded interpreters were in use (see issue
#17408 and #19088). */
copyreg_module = PyDict_GetItemWithError(interp->modules, copyreg_str);
PyObject *modules = PyImport_GetModuleDict();
copyreg_module = PyDict_GetItemWithError(modules, copyreg_str);
if (copyreg_module != NULL) {
Py_INCREF(copyreg_module);
return copyreg_module;