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cosmopolitan/third_party/python/runpythonmodule.c
Justine Tunney 7e0a09feec
Mint APE Loader v1.5 
This change ports APE Loader to Linux AARCH64, so that Raspberry Pi
users can run programs like redbean, without the executable needing
to modify itself. Progress has also slipped into this change on the
issue of making progress better conforming to user expectations and
industry standards regarding which symbols we're allowed to declare
2023-07-26 13:54:49 -07:00

358 lines
11 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Python 3 │
│ https://docs.python.org/3/license.html │
╚─────────────────────────────────────────────────────────────────────────────*/
#define PY_SSIZE_T_CLEAN
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/struct/siginfo.h"
#include "libc/calls/struct/sigset.h"
#include "libc/calls/ucontext.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/bits.h"
#include "libc/intrin/safemacros.internal.h"
#include "libc/intrin/weaken.h"
#include "libc/log/check.h"
#include "libc/log/log.h"
#include "libc/macros.internal.h"
#include "libc/mem/gc.internal.h"
#include "libc/mem/mem.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/symbols.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/str/locale.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/fileno.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/consts/sig.h"
#include "libc/time/time.h"
#include "libc/x/x.h"
#include "libc/x/xasprintf.h"
#include "third_party/linenoise/linenoise.h"
#include "third_party/python/Include/abstract.h"
#include "third_party/python/Include/ceval.h"
#include "third_party/python/Include/dictobject.h"
#include "third_party/python/Include/fileutils.h"
#include "third_party/python/Include/funcobject.h"
#include "third_party/python/Include/import.h"
#include "third_party/python/Include/listobject.h"
#include "third_party/python/Include/moduleobject.h"
#include "third_party/python/Include/object.h"
#include "third_party/python/Include/pydebug.h"
#include "third_party/python/Include/pyerrors.h"
#include "third_party/python/Include/pylifecycle.h"
#include "third_party/python/Include/pymem.h"
#include "third_party/python/Include/pyport.h"
#include "third_party/python/Include/pythonrun.h"
#include "third_party/python/Include/unicodeobject.h"
#include "third_party/python/Include/yoink.h"
#include "third_party/xed/x86.h"
// clang-format off
STATIC_STACK_SIZE(0x100000);
__static_yoink("__die");
__static_yoink("zipos");
PYTHON_YOINK("cosmo");
PYTHON_YOINK("_locale");
PYTHON_YOINK("_bootlocale");
PYTHON_YOINK("encodings.aliases");
PYTHON_YOINK("encodings.latin_1");
PYTHON_YOINK("encodings.utf_8");
extern char kLaunchPythonModuleName[]; /* optionally generated by pyobj.com */
const struct _frozen *PyImport_FrozenModules = _PyImport_FrozenModules;
struct _inittab *PyImport_Inittab = _PyImport_Inittab;
static int g_gotint;
static void
OnKeyboardInterrupt(int sig)
{
g_gotint = sig;
}
static void
AddCompletion(linenoiseCompletions *c, char *s)
{
char **p = c->cvec;
size_t n = c->len + 1;
if ((p = realloc(p, n * sizeof(*p)))) {
p[n - 1] = s;
c->cvec = p;
c->len = n;
}
}
static void
CompleteModule(const char *s, const char *p, linenoiseCompletions *c)
{
const char *name;
struct _inittab *it;
Py_ssize_t plen, namelen;
PyObject *m, *f, *g, *i, *v, *n;
plen = strlen(p);
for (it = PyImport_Inittab; it->name; ++it) {
if (_startswithi(it->name, p)) {
AddCompletion(c, xasprintf("%s%s", s, it->name + plen));
}
}
if ((m = PyImport_ImportModule("pkgutil"))) {
if ((f = PyObject_GetAttrString(m, "iter_modules"))) {
if ((g = PyObject_CallFunctionObjArgs(f, 0))) {
if ((i = PyObject_GetIter(g))) {
while ((v = PyIter_Next(i))) {
if ((n = PyObject_GetAttrString(v, "name"))) {
if (((name = PyUnicode_AsUTF8AndSize(n, &namelen)) &&
namelen >= plen && !memcasecmp(name, p, plen))) {
AddCompletion(c, xasprintf("%s%s", s, name + plen));
}
Py_DECREF(n);
}
Py_DECREF(v);
}
Py_DECREF(i);
}
Py_DECREF(g);
}
Py_DECREF(f);
}
Py_DECREF(m);
}
}
static void
CompleteDict(const char *b, const char *q, const char *p,
linenoiseCompletions *c, PyObject *o)
{
const char *s;
PyObject *k, *v;
Py_ssize_t i, m;
for (i = 0; PyDict_Next(o, &i, &k, &v);) {
if ((v != Py_None && PyUnicode_Check(k) &&
(s = PyUnicode_AsUTF8AndSize(k, &m)) &&
m >= q - p && !memcasecmp(s, p, q - p))) {
AddCompletion(c, xasprintf("%.*s%.*s", p - b, b, m, s));
}
}
}
static void
CompleteDir(const char *b, const char *q, const char *p,
linenoiseCompletions *c, PyObject *o)
{
Py_ssize_t m;
const char *s;
PyObject *d, *i, *k;
if ((d = PyObject_Dir(o))) {
if ((i = PyObject_GetIter(d))) {
while ((k = PyIter_Next(i))) {
if (((s = PyUnicode_AsUTF8AndSize(k, &m)) &&
m >= q - p && !memcasecmp(s, p, q - p) &&
!(q - p == 0 && m > 4 &&
(s[0+0] == '_' && s[0+1] == '_' &&
s[m-1] == '_' && s[m-2] == '_')))) {
AddCompletion(c, xasprintf("%.*s%.*s", p - b, b, m, s));
}
Py_DECREF(k);
}
Py_DECREF(i);
}
Py_DECREF(d);
}
}
static void
Complete(const char *p, linenoiseCompletions *c)
{
PyObject *o, *t, *i;
const char *q, *s, *b;
if (_startswith(p, "import ")) {
for (q = p + 7; *q; ++q) {
if (!isalnum(*q) && *q != '_') {
return;
}
}
CompleteModule(p, p + 7, c);
return;
}
for (b = p, p += strlen(p); p > b; --p) {
if (!isalnum(p[-1]) && p[-1] != '.' && p[-1] != '_') {
break;
}
}
o = PyModule_GetDict(PyImport_AddModule("__main__"));
if (!*(q = strchrnul(p, '.'))) {
CompleteDict(b, q, p, c, o);
CompleteDir(b, q, p, c, PyDict_GetItemString(o, "__builtins__"));
} else {
s = strndup(p, q - p);
if ((t = PyDict_GetItemString(o, s))) {
Py_INCREF(t);
} else {
o = PyDict_GetItemString(o, "__builtins__");
if (PyObject_HasAttrString(o, s)) {
t = PyObject_GetAttrString(o, s);
}
}
while ((p = q + 1), (o = t)) {
if (*(q = strchrnul(p, '.'))) {
t = PyObject_GetAttrString(o, gc(strndup(p, q - p)));
Py_DECREF(o);
} else {
CompleteDir(b, q, p, c, o);
Py_DECREF(o);
break;
}
}
free(s);
}
}
static void
TerminalCompletion(const char *p, linenoiseCompletions *c)
{
PyGILState_STATE gilstate;
gilstate = PyGILState_Ensure();
Complete(p, c);
PyGILState_Release(gilstate);
if (PyErr_Occurred()) {
PyErr_Clear();
}
}
static char *
TerminalHint(const char *p, const char **ansi1, const char **ansi2)
{
char *h = 0;
linenoiseCompletions c = {0};
TerminalCompletion(p, &c);
if (c.len == 1) h = strdup(c.cvec[0] + strlen(p));
linenoiseFreeCompletions(&c);
return h;
}
static char *
ReinterpretCommand(const char *line)
{
size_t n;
n = strlen(line);
if (n && line[n - 1] == '?') {
return xstrcat("help(", gc(strndup(gc(line), n - 1)), ')');
} else {
return line;
}
}
static char *
TerminalReadline(FILE *sys_stdin, FILE *sys_stdout, const char *prompt)
{
size_t n;
char *p, *q;
PyOS_sighandler_t saint;
saint = PyOS_setsig(SIGINT, OnKeyboardInterrupt);
p = linenoiseWithHistory(prompt, "python");
PyOS_setsig(SIGINT, saint);
if (g_gotint) {
PyOS_setsig(SIGINT, saint);
g_gotint = 0;
q = 0;
} else if (p) {
p = ReinterpretCommand(p);
n = strlen(p);
q = PyMem_RawMalloc(n + 2);
strcpy(mempcpy(q, p, n), "\n");
clearerr(sys_stdin);
} else if ((q = PyMem_RawMalloc(1))) {
*q = 0;
}
free(p);
return q;
}
int
RunPythonModule(int argc, char **argv)
{
char *launchargs[4];
wchar_t **argv_copy;
/* We need a second copy, as Python might modify the first one. */
wchar_t **argv_copy2;
int i, res;
char *oldloc;
if (argc == 1 && _weaken(kLaunchPythonModuleName)) {
launchargs[0] = argv[0];
launchargs[1] = strdup("-m");
launchargs[2] = strdup(kLaunchPythonModuleName);
launchargs[3] = 0;
argc = 3;
argv = launchargs;
}
PyOS_ReadlineFunctionPointer = TerminalReadline;
linenoiseSetCompletionCallback(TerminalCompletion);
linenoiseSetHintsCallback(TerminalHint);
linenoiseSetFreeHintsCallback(free);
#if IsModeDbg()
/* Force malloc() allocator to bootstrap Python */
_PyMem_SetupAllocators("malloc");
#endif
argv_copy = (wchar_t **)PyMem_RawMalloc(sizeof(wchar_t*) * (argc+1));
argv_copy2 = (wchar_t **)PyMem_RawMalloc(sizeof(wchar_t*) * (argc+1));
if (!argv_copy || !argv_copy2) {
fprintf(stderr, "out of memory\n");
return 1;
}
/* 754 requires that FP exceptions run in "no stop" mode by default,
* and until C vendors implement C99's ways to control FP exceptions,
* Python requires non-stop mode. Alas, some platforms enable FP
* exceptions by default. Here we disable them.
*/
#ifdef __FreeBSD__
fedisableexcept(FE_OVERFLOW);
#endif
oldloc = _PyMem_RawStrdup(setlocale(LC_ALL, NULL));
if (!oldloc) {
fprintf(stderr, "out of memory\n");
return 1;
}
setlocale(LC_ALL, "");
for (i = 0; i < argc; i++) {
argv_copy[i] = Py_DecodeLocale(argv[i], NULL);
if (!argv_copy[i]) {
PyMem_RawFree(oldloc);
fprintf(stderr, "Fatal Python error: "
"unable to decode the command line argument #%i\n",
i + 1);
return 1;
}
argv_copy2[i] = argv_copy[i];
}
argv_copy2[argc] = argv_copy[argc] = NULL;
setlocale(LC_ALL, oldloc);
PyMem_RawFree(oldloc);
res = Py_Main(argc, argv_copy);
#if IsModeDbg()
/* Force again malloc() allocator to release memory blocks allocated
before Py_Main() */
_PyMem_SetupAllocators("malloc");
#endif
for (i = 0; i < argc; i++) {
PyMem_RawFree(argv_copy2[i]);
}
PyMem_RawFree(argv_copy);
PyMem_RawFree(argv_copy2);
return res;
}
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