mirror of
https://github.com/python/cpython.git
synced 2024-11-28 16:45:42 +01:00
a9e7dc1081
* flmodule.c: added {do,check}_only_forms to fl's list of functions;
and don't print a message when an unknown object is returned.
* pythonrun.c: catch SIGHUP and SIGTERM to do essential cleanup.
* Made jpegmodule.c smaller by using getargs() and mkvalue() consistently.
* Increased parser stack size to 500 in parser.h.
* Implemented custom allocation of stack frames to frameobject.c and
added dynamic stack overflow checks (value stack only) to ceval.c.
(There seems to be a bug left: sometimes stack traces don't make sense.)
506 lines
9.2 KiB
C
506 lines
9.2 KiB
C
/***********************************************************
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Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The
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Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Python interpreter top-level routines, including init/exit */
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#include "allobjects.h"
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#include "grammar.h"
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#include "node.h"
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#include "parsetok.h"
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#include "graminit.h"
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#include "errcode.h"
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#include "sysmodule.h"
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#include "compile.h"
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#include "eval.h"
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#include "ceval.h"
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#include "pythonrun.h"
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#include "import.h"
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#ifdef unix
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#define HANDLE_SIGNALS
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#endif
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#ifdef HANDLE_SIGNALS
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#include <signal.h>
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#include "sigtype.h"
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#endif
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extern char *getpythonpath();
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extern grammar gram; /* From graminit.c */
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void initsigs(); /* Forward */
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int debugging; /* Needed by parser.c */
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int verbose; /* Needed by import.c */
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/* Initialize all */
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void
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initall()
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{
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static int inited;
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if (inited)
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return;
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inited = 1;
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initimport();
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/* Modules 'builtin' and 'sys' are initialized here,
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they are needed by random bits of the interpreter.
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All other modules are optional and are initialized
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when they are first imported. */
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initbuiltin(); /* Also initializes builtin exceptions */
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initsys();
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initcalls(); /* Configuration-dependent initializations */
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setpythonpath(getpythonpath());
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initsigs(); /* Signal handling stuff, including initintr() */
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}
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/* Parse input from a file and execute it */
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int
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run(fp, filename)
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FILE *fp;
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char *filename;
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{
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if (filename == NULL)
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filename = "???";
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if (isatty((int)fileno(fp)))
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return run_tty_loop(fp, filename);
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else
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return run_script(fp, filename);
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}
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int
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run_tty_loop(fp, filename)
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FILE *fp;
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char *filename;
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{
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object *v;
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int ret;
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v = sysget("ps1");
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if (v == NULL) {
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sysset("ps1", v = newstringobject(">>> "));
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XDECREF(v);
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}
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v = sysget("ps2");
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if (v == NULL) {
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sysset("ps2", v = newstringobject("... "));
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XDECREF(v);
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}
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for (;;) {
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ret = run_tty_1(fp, filename);
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#ifdef REF_DEBUG
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fprintf(stderr, "[%ld refs]\n", ref_total);
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#endif
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if (ret == E_EOF)
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return 0;
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/*
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if (ret == E_NOMEM)
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return -1;
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*/
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}
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}
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int
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run_tty_1(fp, filename)
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FILE *fp;
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char *filename;
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{
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object *m, *d, *v, *w;
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node *n;
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char *ps1, *ps2;
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int err;
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v = sysget("ps1");
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w = sysget("ps2");
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if (v != NULL && is_stringobject(v)) {
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INCREF(v);
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ps1 = getstringvalue(v);
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}
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else {
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v = NULL;
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ps1 = "";
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}
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if (w != NULL && is_stringobject(w)) {
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INCREF(w);
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ps2 = getstringvalue(w);
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}
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else {
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w = NULL;
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ps2 = "";
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}
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BGN_SAVE
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err = parsefile(fp, filename, &gram, single_input, ps1, ps2, &n);
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END_SAVE
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XDECREF(v);
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XDECREF(w);
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if (err == E_EOF)
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return E_EOF;
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if (err != E_DONE) {
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err_input(err);
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print_error();
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return err;
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}
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m = add_module("__main__");
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if (m == NULL)
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return -1;
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d = getmoduledict(m);
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v = run_node(n, filename, d, d);
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flushline();
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if (v == NULL) {
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print_error();
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return -1;
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}
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DECREF(v);
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return 0;
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}
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int
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run_script(fp, filename)
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FILE *fp;
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char *filename;
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{
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object *m, *d, *v;
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m = add_module("__main__");
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if (m == NULL)
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return -1;
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d = getmoduledict(m);
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v = run_file(fp, filename, file_input, d, d);
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flushline();
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if (v == NULL) {
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print_error();
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return -1;
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}
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DECREF(v);
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return 0;
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}
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int
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run_command(command)
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char *command;
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{
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object *m, *d, *v;
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m = add_module("__main__");
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if (m == NULL)
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return -1;
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d = getmoduledict(m);
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v = run_string(command, file_input, d, d);
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flushline();
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if (v == NULL) {
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print_error();
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return -1;
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}
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DECREF(v);
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return 0;
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}
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void
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print_error()
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{
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object *exception, *v, *f;
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err_get(&exception, &v);
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if (exception == SystemExit) {
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if (v == NULL || v == None)
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goaway(0);
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if (is_intobject(v))
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goaway((int)getintvalue(v));
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else {
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/* OK to use real stderr here */
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printobject(v, stderr, PRINT_RAW);
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fprintf(stderr, "\n");
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goaway(1);
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}
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}
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sysset("last_type", exception);
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sysset("last_value", v);
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f = sysget("stderr");
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if (f == NULL)
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fprintf(stderr, "lost sys.stderr\n");
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else {
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if (writeobject(exception, f, PRINT_RAW) != 0)
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err_clear();
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if (v != NULL && v != None) {
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writestring(": ", f);
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if (writeobject(v, f, PRINT_RAW) != 0)
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err_clear();
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}
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writestring("\n", f);
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printtraceback(f);
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}
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XDECREF(exception);
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XDECREF(v);
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}
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object *
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run_string(str, start, globals, locals)
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char *str;
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int start;
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/*dict*/object *globals, *locals;
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{
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node *n;
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int err;
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err = parse_string(str, start, &n);
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return run_err_node(err, n, "<string>", globals, locals);
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}
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object *
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run_file(fp, filename, start, globals, locals)
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FILE *fp;
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char *filename;
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int start;
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/*dict*/object *globals, *locals;
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{
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node *n;
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int err;
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err = parse_file(fp, filename, start, &n);
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return run_err_node(err, n, filename, globals, locals);
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}
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object *
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run_err_node(err, n, filename, globals, locals)
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int err;
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node *n;
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char *filename;
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/*dict*/object *globals, *locals;
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{
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if (err != E_DONE) {
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err_input(err);
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return NULL;
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}
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return run_node(n, filename, globals, locals);
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}
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object *
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run_node(n, filename, globals, locals)
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node *n;
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char *filename;
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/*dict*/object *globals, *locals;
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{
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if (globals == NULL) {
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globals = getglobals();
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if (locals == NULL)
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locals = getlocals();
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}
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else {
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if (locals == NULL)
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locals = globals;
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}
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return eval_node(n, filename, globals, locals);
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}
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object *
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eval_node(n, filename, globals, locals)
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node *n;
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char *filename;
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object *globals;
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object *locals;
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{
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codeobject *co;
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object *v;
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co = compile(n, filename);
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freetree(n);
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if (co == NULL)
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return NULL;
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v = eval_code(co, globals, locals, (object *)NULL);
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DECREF(co);
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return v;
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}
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/* Simplified interface to parsefile */
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int
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parse_file(fp, filename, start, n_ret)
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FILE *fp;
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char *filename;
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int start;
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node **n_ret;
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{
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int ret;
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BGN_SAVE
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ret = parsefile(fp, filename, &gram, start,
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(char *)0, (char *)0, n_ret);
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END_SAVE
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return ret;
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}
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/* Simplified interface to parsestring */
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int
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parse_string(str, start, n_ret)
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char *str;
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int start;
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node **n_ret;
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{
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int err = parsestring(str, &gram, start, n_ret);
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/* Don't confuse early end of string with early end of input */
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if (err == E_EOF)
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err = E_SYNTAX;
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return err;
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}
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/* Print fatal error message and abort */
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void
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fatal(msg)
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char *msg;
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{
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fprintf(stderr, "Fatal error: %s\n", msg);
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abort();
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}
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/* Clean up and exit */
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#ifdef USE_THREAD
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extern int threads_started;
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#endif
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void
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cleanup()
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{
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object *exitfunc = sysget("exitfunc");
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if (exitfunc) {
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object *arg;
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object *res;
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sysset("exitfunc", (object *)NULL);
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arg = newtupleobject(0);
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if (arg == NULL)
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res = NULL;
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else {
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res = call_object(exitfunc, arg);
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DECREF(arg);
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}
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if (res == NULL) {
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fprintf(stderr, "Error in sys.exitfunc:\n");
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print_error();
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}
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}
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flushline();
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}
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void
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goaway(sts)
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int sts;
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{
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cleanup();
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#ifdef USE_THREAD
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/* Other threads may still be active, so skip most of the
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cleanup actions usually done (these are mostly for
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debugging anyway). */
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(void) save_thread();
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donecalls();
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if (threads_started)
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_exit_prog(sts);
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else
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exit_prog(sts);
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#else /* USE_THREAD */
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/* XXX Call doneimport() before donecalls(), since donecalls()
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calls wdone(), and doneimport() may close windows */
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doneimport();
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donecalls();
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err_clear();
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#ifdef REF_DEBUG
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fprintf(stderr, "[%ld refs]\n", ref_total);
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#endif
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#ifdef TRACE_REFS
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if (askyesno("Print left references?")) {
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printrefs(stderr);
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}
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#endif /* TRACE_REFS */
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exit(sts);
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#endif /* USE_THREAD */
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/*NOTREACHED*/
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}
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#ifdef HANDLE_SIGNALS
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SIGTYPE
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sighandler(sig)
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int sig;
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{
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signal(sig, SIG_DFL); /* Don't catch recursive signals */
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cleanup(); /* Do essential clean-up */
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kill(getpid(), sig); /* Pretend the signal killed us */
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/*NOTREACHED*/
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}
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#endif
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void
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initsigs()
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{
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initintr();
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#ifdef HANDLE_SIGNALS
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if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
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signal(SIGHUP, sighandler);
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if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
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signal(SIGTERM, sighandler);
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#endif
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}
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#ifdef TRACE_REFS
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/* Ask a yes/no question */
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int
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askyesno(prompt)
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char *prompt;
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{
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char buf[256];
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printf("%s [ny] ", prompt);
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if (fgets(buf, sizeof buf, stdin) == NULL)
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return 0;
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return buf[0] == 'y' || buf[0] == 'Y';
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}
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#endif
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#ifdef applec /* MPW (also usable for Think C 3.0) */
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/* Check for file descriptor connected to interactive device.
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Pretend that stdin is always interactive, other files never. */
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int
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isatty(fd)
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int fd;
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{
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return fd == fileno(stdin);
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}
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#endif
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