[Windows] add support for pypy2 on windows (#1872)

HISTORY.rst

@@ -7,9 +7,15 @@ XXXX-XX-XX
 
 **Enhancements**
 
-- 1875_: `disk_partitions()` exposes 2 extra fields: `maxfile` and `maxpath`,
+- 1872_: [Windows] added support for PyPy 2.7.
+- 1863_: `disk_partitions()` exposes 2 extra fields: `maxfile` and `maxpath`,
   which are the maximum file name and path name length.
 
+**Bug fixes**
+
+- 1866_: [Windows] process exe(), cmdline(), environ() may raise "invalid
+  access to memory location" on Python 3.9.
+
 5.7.3
 =====
 

psutil/_psutil_common.c

@@ -23,9 +23,8 @@ int PSUTIL_TESTING = 0;
 // ====================================================================
 
 // PyPy on Windows
-#if defined(PSUTIL_WINDOWS) && \
-    defined(PYPY_VERSION) && \
-    !defined(PyErr_SetFromWindowsErrWithFilename)
+#if defined(PSUTIL_WINDOWS) && defined(PYPY_VERSION)
+#if !defined(PyErr_SetFromWindowsErrWithFilename)
 PyObject *
 PyErr_SetFromWindowsErrWithFilename(int winerr, const char *filename) {
     PyObject *py_exc = NULL;
@@ -58,7 +57,17 @@ PyErr_SetFromWindowsErrWithFilename(int winerr, const char *filename) {
     Py_XDECREF(py_winerr);
     return NULL;
 }
-#endif  // PYPY on Windows
+#endif  // !defined(PyErr_SetFromWindowsErrWithFilename)
+
+
+// PyPy 2.7
+#if !defined(PyErr_SetFromWindowsErr)
+PyObject *
+PyErr_SetFromWindowsErr(int winerr) {
+    return PyErr_SetFromWindowsErrWithFilename(winerr, "");
+}
+#endif  // !defined(PyErr_SetFromWindowsErr)
+#endif  // defined(PSUTIL_WINDOWS) && defined(PYPY_VERSION)
 
 
 // ====================================================================

psutil/arch/windows/wmi.c

@@ -10,6 +10,8 @@
 #include <windows.h>
 #include <pdh.h>
 
+#include "../../_psutil_common.h"
+
 
 // We use an exponentially weighted moving average, just like Unix systems do
 // https://en.wikipedia.org/wiki/Load_(computing)#Unix-style_load_calculation