/* * Copyright (c) 1983 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint char copyright[] = "@(#) Copyright (c) 1983 The Regents of the University of California.\n\ All rights reserved.\n"; #endif /* not lint */ #ifndef lint static char sccsid[] = "@(#)main.c 5.7 (Berkeley) 6/1/90"; #endif /* not lint */ /* * Debugger main routine. */ #include "defs.h" #include <setjmp.h> #include <signal.h> #include <errno.h> #include "main.h" #include "tree.h" #include "eval.h" #include "debug.h" #include "symbols.h" #include "scanner.h" #include "keywords.h" #include "process.h" #include "runtime.h" #include "source.h" #include "object.h" #include "mappings.h" #include "coredump.h" #include "pathnames.h" #ifndef public #define isterm(file) (interactive or isatty(fileno(file))) #ifdef IRIS # include <termio.h> typedef struct termio Ttyinfo; #else # include <sgtty.h> # include <fcntl.h> typedef struct { struct sgttyb sg; /* standard sgttyb structure */ struct tchars tc; /* terminal characters */ struct ltchars ltc; /* local special characters */ integer ldisc; /* line discipline */ integer local; /* TIOCLGET */ integer fcflags; /* fcntl(2) F_GETFL, F_SETFL */ } Ttyinfo; #endif #endif public boolean coredump; /* true if using a core dump */ public boolean runfirst; /* run program immediately */ public boolean interactive; /* standard input IS a terminal */ public boolean lexdebug; /* trace scanner return values */ public boolean tracebpts; /* trace create/delete breakpoints */ public boolean traceexec; /* trace execution */ public boolean tracesyms; /* print symbols are they are read */ public boolean traceblocks; /* trace blocks while reading symbols */ public boolean vaddrs; /* map addresses through page tables */ public boolean quiet; /* don't print heading */ public boolean autostrip; /* strip C++ prefixes */ public File corefile; /* File id of core dump */ public integer versionNumber = 4; #define FIRST_TIME 0 /* initial value setjmp returns */ private Boolean initdone = false; /* true if initialization done */ private jmp_buf env; /* setjmp/longjmp data */ private char outbuf[BUFSIZ]; /* standard output buffer */ private char namebuf[512]; /* possible name of object file */ private Ttyinfo ttyinfo; private String corename; /* name of core file */ private catchintr(); private char **scanargs(); /* * Main program. */ main(argc, argv) int argc; String argv[]; { extern integer versionNumber; char **scanargs(); if (!(cmdname = rindex(*argv, '/'))) cmdname = *argv; else ++cmdname; catcherrs(); onsyserr(EINTR, nil); onsyserr(EADDRINUSE, nil); onsyserr(ENXIO, nil); setbuf(stdout, outbuf); argv = scanargs(argc, argv); if (not runfirst and not quiet) { printheading(); } openfiles(); language_init(); symbols_init(); process_init(); optab_init(); if (runfirst) { if (setjmp(env) == FIRST_TIME) { arginit(); while (*argv) newarg(*argv++); run(); /* NOTREACHED */ } else { runfirst = false; } } else { init(); } if (setjmp(env) != FIRST_TIME) { restoretty(stdout, &ttyinfo); } signal(SIGINT, catchintr); yyparse(); putchar('\n'); quit(0); } public printheading () { extern String date; printf("dbx version 3.%d of %s.\nType 'help' for help.\n", versionNumber, date ); fflush(stdout); } /* * Initialize the world, including setting initial input file * if the file exists. */ public init() { File f; String home; char buf[100]; extern String getenv(); savetty(stdout, &ttyinfo); enterkeywords(); scanner_init(); if (not coredump and not runfirst) { start(nil, nil, nil); } printf("reading symbolic information ..."); fflush(stdout); readobj(objname); printf("\n"); fflush(stdout); if (coredump) { printf("[using memory image in %s]\n", corename); if (vaddrs) { coredump_getkerinfo(); } getsrcpos(); setcurfunc(whatblock(pc)); } else { setcurfunc(program); } bpinit(); f = fopen(initfile, "r"); if (f != nil) { fclose(f); setinput(initfile); } else { home = getenv("HOME"); if (home != nil) { sprintf(buf, "%s/%s", home, initfile); f = fopen(buf, "r"); if (f != nil) { fclose(f); setinput(strdup(buf)); } } } initdone = true; } /* * Re-initialize the world, first de-allocating all storage. * This is necessary when the symbol information must be re-read * from the object file when it has changed. * * Before "forgetting" things, we save the current tracing/breakpoint * information to a temp file. Then after re-creating the world, * we read the temp file as commands. This isn't always the right thing; * if a procedure that was being traced is deleted, an error message * will be generated. * * If the argument vector is not nil, then this is re-initialize is being * done in preparation for running the program. Since we want to process * the commands in the temp file before running the program, we add the * run command at the end of the temp file. In this case, reinit longjmps * back to parsing rather than returning. */ public reinit(argv, infile, outfile) String *argv; String infile; String outfile; { register Integer i; String tmpfile; extern String mktemp(); tmpfile = mktemp(_PATH_TMP); setout(tmpfile); status(); alias(nil, nil, nil); if (argv != nil) { printf("run"); for (i = 1; argv[i] != nil; i++) { printf(" %s", argv[i]); } if (infile != nil) { printf(" < %s", infile); } if (outfile != nil) { printf(" > %s", outfile); } putchar('\n'); } unsetout(); bpfree(); objfree(); symbols_init(); process_init(); enterkeywords(); scanner_init(); readobj(objname); bpinit(); fflush(stdout); setinput(tmpfile); unlink(tmpfile); if (argv != nil) { longjmp(env, 1); /* NOTREACHED */ } } /* * After a non-fatal error we skip the rest of the current input line, and * jump back to command parsing. */ public erecover() { if (initdone) { gobble(); longjmp(env, 1); } } /* * This routine is called when an interrupt occurs. */ private catchintr() { if (isredirected()) { fflush(stdout); unsetout(); } putchar('\n'); longjmp(env, 1); } /* * Scan the argument list. */ private char **scanargs (argc, argv) int argc; String argv[]; { extern char *optarg; extern integer optind; integer ch; runfirst = false; interactive = false; lexdebug = false; tracebpts = false; traceexec = false; tracesyms = false; traceblocks = false; vaddrs = false; quiet = false; autostrip = true; corefile = nil; coredump = true; sourcepath = list_alloc(); list_append(list_item("."), nil, sourcepath); while ((ch = getopt(argc, argv, "I:abc:eiklnqrs")) != EOF) switch((char)ch) { case 'I': list_append(list_item(optarg), nil, sourcepath); break; case 'a': autostrip = false; break; case 'b': tracebpts = true; break; case 'c': initfile = optarg; break; case 'e': traceexec = true; break; case 'i': interactive = true; break; case 'k': vaddrs = true; break; case 'l': #ifdef LEXDEBUG lexdebug = true; #else fatal("\"-l\" only applicable when compiled with LEXDEBUG"); #endif break; case 'n': traceblocks = true; break; case 'q': quiet = true; break; case 'r': /* run program before accepting commands */ runfirst = true; coredump = false; break; case 's': tracesyms = true; break; case '?': default: fatal("unknown option"); } argv += optind; if (*argv) { objname = *argv; if (*++argv && coredump) { corename = *argv; corefile = fopen(*argv, "r"); if (corefile == nil) coredump = false; ++argv; } } if (*argv and not runfirst) { fatal("extraneous argument %s", *argv); } return argv; } private openfiles () { File f; char *tmp; if (objname == nil and isatty(0)) { printf("enter object file name (default is `%s'): ", objname); fflush(stdout); gets(namebuf); if (namebuf[0] != '\0') { objname = namebuf; } } f = fopen(objname, "r"); if (f == nil) { fatal("can't read %s", objname); } else { fclose(f); } if (rindex(objname, '/') != nil) { tmp = strdup(objname); *(rindex(tmp, '/')) = '\0'; list_append(list_item(tmp), nil, sourcepath); } if (coredump and corefile == nil) { if (vaddrs) { corename = _PATH_MEM; corefile = fopen(corename, "r"); if (corefile == nil) { panic("can't open %s", _PATH_MEM); } } else { corename = "core"; corefile = fopen(corename, "r"); if (corefile == nil) { coredump = false; } } } } /* * Save/restore the state of a tty. */ public savetty(f, t) File f; Ttyinfo *t; { # ifdef IRIS ioctl(fileno(f), TCGETA, t); # else ioctl(fileno(f), TIOCGETP, &(t->sg)); ioctl(fileno(f), TIOCGETC, &(t->tc)); ioctl(fileno(f), TIOCGLTC, &(t->ltc)); ioctl(fileno(f), TIOCGETD, &(t->ldisc)); ioctl(fileno(f), TIOCLGET, &(t->local)); t->fcflags = fcntl(fileno(f), F_GETFL, 0); if ((t->fcflags&FASYNC) != 0) { /* fprintf(stderr, "[async i/o found set -- reset]\n"); */ t->fcflags &= ~FASYNC; } # endif } public restoretty(f, t) File f; Ttyinfo *t; { # ifdef IRIS ioctl(fileno(f), TCSETA, t); # else ioctl(fileno(f), TIOCSETN, &(t->sg)); ioctl(fileno(f), TIOCSETC, &(t->tc)); ioctl(fileno(f), TIOCSLTC, &(t->ltc)); ioctl(fileno(f), TIOCSETD, &(t->ldisc)); ioctl(fileno(f), TIOCLSET, &(t->local)); if ((t->fcflags&FASYNC) != 0) { /* fprintf(stderr, "[async i/o not set]\n"); */ t->fcflags &= ~FASYNC; } (void) fcntl(fileno(f), F_SETFL, t->fcflags); # endif } /* * Exit gracefully. */ public quit(r) Integer r; { pterm(process); exit(r); }