Library import 16 (#2433)

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1 files changed, 0 insertions, 347 deletions

diff --git a/contrib/tools/python3/src/Python/dynload_win.c b/contrib/tools/python3/src/Python/dynload_win.c
deleted file mode 100644
index acab05e2c6d..00000000000
--- a/contrib/tools/python3/src/Python/dynload_win.c
+++ /dev/null
@@ -1,347 +0,0 @@
-
-/* Support for dynamic loading of extension modules */
-
-#include "Python.h"
-#include "pycore_fileutils.h"     // _Py_add_relfile()
-#include "pycore_pystate.h"       // _PyInterpreterState_GET()
-
-#ifdef HAVE_DIRECT_H
-#include <direct.h>
-#endif
-#include <ctype.h>
-
-#include "importdl.h"
-#include "patchlevel.h"
-#include <windows.h>
-
-#ifdef _DEBUG
-#define PYD_DEBUG_SUFFIX "_d"
-#else
-#define PYD_DEBUG_SUFFIX ""
-#endif
-
-#ifdef PYD_PLATFORM_TAG
-#define PYD_TAGGED_SUFFIX PYD_DEBUG_SUFFIX ".cp" Py_STRINGIFY(PY_MAJOR_VERSION) Py_STRINGIFY(PY_MINOR_VERSION) "-" PYD_PLATFORM_TAG ".pyd"
-#else
-#define PYD_TAGGED_SUFFIX PYD_DEBUG_SUFFIX ".cp" Py_STRINGIFY(PY_MAJOR_VERSION) Py_STRINGIFY(PY_MINOR_VERSION) ".pyd"
-#endif
-
-#define PYD_UNTAGGED_SUFFIX PYD_DEBUG_SUFFIX ".pyd"
-
-const char *_PyImport_DynLoadFiletab[] = {
-    PYD_TAGGED_SUFFIX,
-    PYD_UNTAGGED_SUFFIX,
-    NULL
-};
-
-/* Function to return the name of the "python" DLL that the supplied module
-   directly imports.  Looks through the list of imported modules and
-   returns the first entry that starts with "python" (case sensitive) and
-   is followed by nothing but numbers until the separator (period).
-
-   Returns a pointer to the import name, or NULL if no matching name was
-   located.
-
-   This function parses through the PE header for the module as loaded in
-   memory by the system loader.  The PE header is accessed as documented by
-   Microsoft in the MSDN PE and COFF specification (2/99), and handles
-   both PE32 and PE32+.  It only worries about the direct import table and
-   not the delay load import table since it's unlikely an extension is
-   going to be delay loading Python (after all, it's already loaded).
-
-   If any magic values are not found (e.g., the PE header or optional
-   header magic), then this function simply returns NULL. */
-
-#define DWORD_AT(mem) (*(DWORD *)(mem))
-#define WORD_AT(mem)  (*(WORD *)(mem))
-
-static char *GetPythonImport (HINSTANCE hModule)
-{
-    unsigned char *dllbase, *import_data, *import_name;
-    DWORD pe_offset, opt_offset;
-    WORD opt_magic;
-    int num_dict_off, import_off;
-
-    /* Safety check input */
-    if (hModule == NULL) {
-        return NULL;
-    }
-
-    /* Module instance is also the base load address.  First portion of
-       memory is the MS-DOS loader, which holds the offset to the PE
-       header (from the load base) at 0x3C */
-    dllbase = (unsigned char *)hModule;
-    pe_offset = DWORD_AT(dllbase + 0x3C);
-
-    /* The PE signature must be "PE\0\0" */
-    if (memcmp(dllbase+pe_offset,"PE\0\0",4)) {
-        return NULL;
-    }
-
-    /* Following the PE signature is the standard COFF header (20
-       bytes) and then the optional header.  The optional header starts
-       with a magic value of 0x10B for PE32 or 0x20B for PE32+ (PE32+
-       uses 64-bits for some fields).  It might also be 0x107 for a ROM
-       image, but we don't process that here.
-
-       The optional header ends with a data dictionary that directly
-       points to certain types of data, among them the import entries
-       (in the second table entry). Based on the header type, we
-       determine offsets for the data dictionary count and the entry
-       within the dictionary pointing to the imports. */
-
-    opt_offset = pe_offset + 4 + 20;
-    opt_magic = WORD_AT(dllbase+opt_offset);
-    if (opt_magic == 0x10B) {
-        /* PE32 */
-        num_dict_off = 92;
-        import_off   = 104;
-    } else if (opt_magic == 0x20B) {
-        /* PE32+ */
-        num_dict_off = 108;
-        import_off   = 120;
-    } else {
-        /* Unsupported */
-        return NULL;
-    }
-
-    /* Now if an import table exists, offset to it and walk the list of
-       imports.  The import table is an array (ending when an entry has
-       empty values) of structures (20 bytes each), which contains (at
-       offset 12) a relative address (to the module base) at which a
-       string constant holding the import name is located. */
-
-    if (DWORD_AT(dllbase + opt_offset + num_dict_off) >= 2) {
-        /* We have at least 2 tables - the import table is the second
-           one.  But still it may be that the table size is zero */
-        if (0 == DWORD_AT(dllbase + opt_offset + import_off + sizeof(DWORD)))
-            return NULL;
-        import_data = dllbase + DWORD_AT(dllbase +
-                                         opt_offset +
-                                         import_off);
-        while (DWORD_AT(import_data)) {
-            import_name = dllbase + DWORD_AT(import_data+12);
-            if (strlen(import_name) >= 6 &&
-                !strncmp(import_name,"python",6)) {
-                char *pch;
-
-                /* Don't claim that python3.dll is a Python DLL. */
-#ifdef _DEBUG
-                if (strcmp(import_name, "python3_d.dll") == 0) {
-#else
-                if (strcmp(import_name, "python3.dll") == 0) {
-#endif
-                    import_data += 20;
-                    continue;
-                }
-
-                /* Ensure python prefix is followed only
-                   by numbers to the end of the basename */
-                pch = import_name + 6;
-#ifdef _DEBUG
-                while (*pch && pch[0] != '_' && pch[1] != 'd' && pch[2] != '.') {
-#else
-                while (*pch && *pch != '.') {
-#endif
-                    if (*pch >= '0' && *pch <= '9') {
-                        pch++;
-                    } else {
-                        pch = NULL;
-                        break;
-                    }
-                }
-
-                if (pch) {
-                    /* Found it - return the name */
-                    return import_name;
-                }
-            }
-            import_data += 20;
-        }
-    }
-
-    return NULL;
-}
-
-#ifdef Py_ENABLE_SHARED
-/* Load python3.dll before loading any extension module that might refer
-   to it. That way, we can be sure that always the python3.dll corresponding
-   to this python DLL is loaded, not a python3.dll that might be on the path
-   by chance.
-   Return whether the DLL was found.
-*/
-extern HMODULE PyWin_DLLhModule;
-static int
-_Py_CheckPython3(void)
-{
-    static int python3_checked = 0;
-    static HANDLE hPython3;
-    #define MAXPATHLEN 512
-    wchar_t py3path[MAXPATHLEN+1];
-    if (python3_checked) {
-        return hPython3 != NULL;
-    }
-    python3_checked = 1;
-
-    /* If there is a python3.dll next to the python3y.dll,
-       use that DLL */
-    if (PyWin_DLLhModule && GetModuleFileNameW(PyWin_DLLhModule, py3path, MAXPATHLEN)) {
-        wchar_t *p = wcsrchr(py3path, L'\\');
-        if (p) {
-            wcscpy(p + 1, PY3_DLLNAME);
-            hPython3 = LoadLibraryExW(py3path, NULL, LOAD_LIBRARY_SEARCH_DEFAULT_DIRS);
-            if (hPython3 != NULL) {
-                return 1;
-            }
-        }
-    }
-
-    /* If we can locate python3.dll in our application dir,
-       use that DLL */
-    hPython3 = LoadLibraryExW(PY3_DLLNAME, NULL, LOAD_LIBRARY_SEARCH_APPLICATION_DIR);
-    if (hPython3 != NULL) {
-        return 1;
-    }
-
-    /* For back-compat, also search {sys.prefix}\DLLs, though
-       that has not been a normal install layout for a while */
-    PyInterpreterState *interp = _PyInterpreterState_GET();
-    PyConfig *config = (PyConfig*)_PyInterpreterState_GetConfig(interp);
-    assert(config->prefix);
-    if (config->prefix) {
-        wcscpy_s(py3path, MAXPATHLEN, config->prefix);
-        if (py3path[0] && _Py_add_relfile(py3path, L"DLLs\\" PY3_DLLNAME, MAXPATHLEN) >= 0) {
-            hPython3 = LoadLibraryExW(py3path, NULL, LOAD_LIBRARY_SEARCH_DEFAULT_DIRS);
-        }
-    }
-    return hPython3 != NULL;
-    #undef MAXPATHLEN
-}
-#endif /* Py_ENABLE_SHARED */
-
-dl_funcptr _PyImport_FindSharedFuncptrWindows(const char *prefix,
-                                              const char *shortname,
-                                              PyObject *pathname, FILE *fp)
-{
-    dl_funcptr p;
-    char funcname[258], *import_python;
-
-#ifdef Py_ENABLE_SHARED
-    _Py_CheckPython3();
-#endif /* Py_ENABLE_SHARED */
-
-    wchar_t *wpathname = PyUnicode_AsWideCharString(pathname, NULL);
-    if (wpathname == NULL)
-        return NULL;
-
-    PyOS_snprintf(funcname, sizeof(funcname), "%.20s_%.200s", prefix, shortname);
-
-    {
-        HINSTANCE hDLL = NULL;
-#ifdef MS_WINDOWS_DESKTOP
-        unsigned int old_mode;
-
-        /* Don't display a message box when Python can't load a DLL */
-        old_mode = SetErrorMode(SEM_FAILCRITICALERRORS);
-#endif
-
-        /* bpo-36085: We use LoadLibraryEx with restricted search paths
-           to avoid DLL preloading attacks and enable use of the
-           AddDllDirectory function. We add SEARCH_DLL_LOAD_DIR to
-           ensure DLLs adjacent to the PYD are preferred. */
-        Py_BEGIN_ALLOW_THREADS
-        hDLL = LoadLibraryExW(wpathname, NULL,
-                              LOAD_LIBRARY_SEARCH_DEFAULT_DIRS |
-                              LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR);
-        Py_END_ALLOW_THREADS
-        PyMem_Free(wpathname);
-
-#ifdef MS_WINDOWS_DESKTOP
-        /* restore old error mode settings */
-        SetErrorMode(old_mode);
-#endif
-
-        if (hDLL==NULL){
-            PyObject *message;
-            unsigned int errorCode;
-
-            /* Get an error string from Win32 error code */
-            wchar_t theInfo[256]; /* Pointer to error text
-                                  from system */
-            int theLength; /* Length of error text */
-
-            errorCode = GetLastError();
-
-            theLength = FormatMessageW(
-                FORMAT_MESSAGE_FROM_SYSTEM |
-                FORMAT_MESSAGE_IGNORE_INSERTS, /* flags */
-                NULL, /* message source */
-                errorCode, /* the message (error) ID */
-                MAKELANGID(LANG_NEUTRAL,
-                           SUBLANG_DEFAULT),
-                           /* Default language */
-                theInfo, /* the buffer */
-                sizeof(theInfo) / sizeof(wchar_t), /* size in wchars */
-                NULL); /* no additional format args. */
-
-            /* Problem: could not get the error message.
-               This should not happen if called correctly. */
-            if (theLength == 0) {
-                message = PyUnicode_FromFormat(
-                    "DLL load failed with error code %u while importing %s",
-                    errorCode, shortname);
-            } else {
-                /* For some reason a \r\n
-                   is appended to the text */
-                if (theLength >= 2 &&
-                    theInfo[theLength-2] == '\r' &&
-                    theInfo[theLength-1] == '\n') {
-                    theLength -= 2;
-                    theInfo[theLength] = '\0';
-                }
-                message = PyUnicode_FromFormat(
-                    "DLL load failed while importing %s: ", shortname);
-
-                PyUnicode_AppendAndDel(&message,
-                    PyUnicode_FromWideChar(
-                        theInfo,
-                        theLength));
-            }
-            if (message != NULL) {
-                PyObject *shortname_obj = PyUnicode_FromString(shortname);
-                PyErr_SetImportError(message, shortname_obj, pathname);
-                Py_XDECREF(shortname_obj);
-                Py_DECREF(message);
-            }
-            return NULL;
-        } else {
-            char buffer[256];
-
-            PyOS_snprintf(buffer, sizeof(buffer),
-#ifdef _DEBUG
-                          "python%d%d_d.dll",
-#else
-                          "python%d%d.dll",
-#endif
-                          PY_MAJOR_VERSION,PY_MINOR_VERSION);
-            import_python = GetPythonImport(hDLL);
-
-            if (import_python &&
-                _stricmp(buffer,import_python)) {
-                PyErr_Format(PyExc_ImportError,
-                             "Module use of %.150s conflicts "
-                             "with this version of Python.",
-                             import_python);
-                Py_BEGIN_ALLOW_THREADS
-                FreeLibrary(hDLL);
-                Py_END_ALLOW_THREADS
-                return NULL;
-            }
-        }
-        Py_BEGIN_ALLOW_THREADS
-        p = GetProcAddress(hDLL, funcname);
-        Py_END_ALLOW_THREADS
-    }
-
-    return p;
-}