mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-23 22:49:00 +00:00
b420ed8248
This change gets the Python codebase into a state where it conforms to the conventions of this codebase. It's now possible to include headers from Python, without worrying about ordering. Python has traditionally solved that problem by "diamonding" everything in Python.h, but that's problematic since it means any change to any Python header invalidates all the build artifacts. Lastly it makes tooling not work. Since it is hard to explain to Emacs when I press C-c C-h to add an import line it shouldn't add the header that actually defines the symbol, and instead do follow the nonstandard Python convention. Progress has been made on letting Python load source code from the zip executable structure via the standard C library APIs. System calss now recognizes zip!FILENAME alternative URIs as equivalent to zip:FILENAME since Python uses colon as its delimiter. Some progress has been made on embedding the notice license terms into the Python object code. This is easier said than done since Python has an extremely complicated ownership story. - Some termios APIs have been added - Implement rewinddir() dirstream API - GetCpuCount() API added to Cosmopolitan Libc - More bugs in Cosmopolitan Libc have been fixed - zipobj.com now has flags for mangling the path - Fixed bug a priori with sendfile() on certain BSDs - Polyfill F_DUPFD and F_DUPFD_CLOEXEC across platforms - FIOCLEX / FIONCLEX now polyfilled for fast O_CLOEXEC changes - APE now supports a hybrid solution to no-self-modify for builds - Many BSD-only magnums added, e.g. O_SEARCH, O_SHLOCK, SF_NODISKIO
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
#include "libc/calls/weirdtypes.h"
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#include "libc/runtime/dlfcn.h"
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#include "third_party/python/Include/fileutils.h"
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#include "third_party/python/Include/modsupport.h"
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#include "third_party/python/Include/pyerrors.h"
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#include "third_party/python/Include/pystate.h"
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#include "third_party/python/Python/importdl.h"
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/* clang-format off */
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#if (defined(__OpenBSD__) || defined(__NetBSD__)) && !defined(__ELF__)
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#define LEAD_UNDERSCORE "_"
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#else
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#define LEAD_UNDERSCORE ""
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#endif
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/* The .so extension module ABI tag, supplied by the Makefile via
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Makefile.pre.in and configure. This is used to discriminate between
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incompatible .so files so that extensions for different Python builds can
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live in the same directory. E.g. foomodule.cpython-32.so
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*/
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const char *_PyImport_DynLoadFiletab[] = {
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#ifdef __CYGWIN__
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".dll",
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#else /* !__CYGWIN__ */
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"." SOABI ".so",
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".abi" PYTHON_ABI_STRING ".so",
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".so",
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#endif /* __CYGWIN__ */
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NULL,
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};
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static struct {
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dev_t dev;
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ino_t ino;
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void *handle;
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} handles[128];
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static int nhandles = 0;
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dl_funcptr
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_PyImport_FindSharedFuncptr(const char *prefix,
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const char *shortname,
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const char *pathname, FILE *fp)
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{
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dl_funcptr p;
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void *handle;
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char funcname[258];
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char pathbuf[260];
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int dlopenflags=0;
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if (strchr(pathname, '/') == NULL) {
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/* Prefix bare filename with "./" */
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PyOS_snprintf(pathbuf, sizeof(pathbuf), "./%-.255s", pathname);
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pathname = pathbuf;
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}
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PyOS_snprintf(funcname, sizeof(funcname),
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LEAD_UNDERSCORE "%.20s_%.200s", prefix, shortname);
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if (fp != NULL) {
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int i;
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struct _Py_stat_struct status;
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if (_Py_fstat(fileno(fp), &status) == -1)
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return NULL;
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for (i = 0; i < nhandles; i++) {
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if (status.st_dev == handles[i].dev &&
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status.st_ino == handles[i].ino) {
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p = (dl_funcptr) dlsym(handles[i].handle,
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funcname);
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return p;
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}
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}
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if (nhandles < 128) {
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handles[nhandles].dev = status.st_dev;
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handles[nhandles].ino = status.st_ino;
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}
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}
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dlopenflags = PyThreadState_GET()->interp->dlopenflags;
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handle = dlopen(pathname, dlopenflags);
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if (handle == NULL) {
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PyObject *mod_name;
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PyObject *path;
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PyObject *error_ob;
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const char *error = dlerror();
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if (error == NULL)
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error = "unknown dlopen() error";
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error_ob = PyUnicode_FromString(error);
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if (error_ob == NULL)
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return NULL;
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mod_name = PyUnicode_FromString(shortname);
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if (mod_name == NULL) {
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Py_DECREF(error_ob);
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return NULL;
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}
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path = PyUnicode_FromString(pathname);
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if (path == NULL) {
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Py_DECREF(error_ob);
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Py_DECREF(mod_name);
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return NULL;
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}
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PyErr_SetImportError(error_ob, mod_name, path);
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Py_DECREF(error_ob);
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Py_DECREF(mod_name);
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Py_DECREF(path);
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return NULL;
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}
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if (fp != NULL && nhandles < 128)
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handles[nhandles++].handle = handle;
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p = (dl_funcptr) dlsym(handle, funcname);
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return p;
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}
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