File: [local] / src / usr.bin / pmdb / Attic / pmdb.c (download)
Revision 1.6, Tue Mar 19 23:17:58 2002 UTC (22 years, 2 months ago) by fgsch
Branch: MAIN
CVS Tags: OPENBSD_3_1_BASE, OPENBSD_3_1 Changes since 1.5: +7 -7 lines
o don't need a var to keep the number of commands; use a define.
o remove extra arg after dale commit.
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/* $OpenBSD: pmdb.c,v 1.6 2002/03/19 23:17:58 fgsch Exp $ */
/*
* Copyright (c) 2002 Artur Grabowski <art@openbsd.org>
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
*/
#include <sys/types.h>
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <err.h>
#include <errno.h>
#include <string.h>
#include <sys/endian.h>
#include "pmdb.h"
#include "symbol.h"
#include "clit.h"
#include "break.h"
static int cmd_show_registers(int, char **, void *);
static int cmd_show_backtrace(int, char **, void *);
static int cmd_quit(int, char **, void *);
struct clit cmds[] = {
/* debugging info commands. */
{ "regs", "show registers", 0, 0, cmd_show_registers, (void *)-1 },
{ "trace", "show backtrace", 0, 0, cmd_show_backtrace, (void *)-1 },
/* Process handling commands. */
{ "run", "run process", 0, 0, cmd_process_run, (void *)-1 },
{ "continue", "continue process", 0, 0, cmd_process_cont, (void *)-1 },
{ "kill", "kill process", 0, 0, cmd_process_kill, (void *)-1 },
/* signal handling commands. */
{ "signal", "ignore signal", 2, 2, cmd_signal_ignore, (void *)-1 },
{ "sigstate", "show signal state", 0, 0, cmd_signal_show, (void *)-1 },
/* breakpoints */
{ "break", "set breakpoint", 1, 1, cmd_bkpt_add, (void *)-1 },
{ "step", "single step one insn", 0, 0, cmd_sstep, (void *)-1 },
/* symbols */
{ "sym_load", "load symbol table", 2, 2, cmd_sym_load, (void *)-1 },
/* misc commands. */
{ "help", "print help", 0, 1, cmd_help, NULL },
{ "quit", "quit", 0, 0, cmd_quit, (void *)-1 },
{ "exit", "quit", 0, 0, cmd_quit, (void *)-1 },
};
#define NCMDS sizeof(cmds)/sizeof(cmds[0])
int
main(int argc, char **argv)
{
extern const char *__progname;
struct pstate ps;
int i;
int status;
void *cm;
char *pmenv;
int level;
if (argc < 2) {
fprintf(stderr, "Usage: %s <program> args\n", __progname);
exit(1);
}
if ((pmenv = getenv("IN_PMDB")) != NULL) {
level = atoi(pmenv);
level++;
} else
level = 0;
if (level > 0)
asprintf(&prompt_add, "(%d)", level);
asprintf(&pmenv, "%d", level);
setenv("IN_PMDB", pmenv, 1);
ps.ps_pid = 0;
ps.ps_state = NONE;
ps.ps_argc = --argc;
ps.ps_argv = ++argv;
ps.ps_flags = 0;
ps.ps_signum = 0;
ps.ps_npc = 1;
TAILQ_INIT(&ps.ps_bkpts);
TAILQ_INIT(&ps.ps_sstep_cbs);
signal(SIGINT, SIG_IGN);
for (i = 0; i < NCMDS; i++)
if (cmds[i].arg == (void *)-1)
cmds[i].arg = &ps;
md_def_init();
init_sigstate(&ps);
process_load(&ps);
cm = cmdinit(cmds, NCMDS);
while (ps.ps_state != TERMINATED) {
int signum;
int stopped;
int cont;
if (ps.ps_state == STOPPED) {
sym_update(&ps);
}
if (ps.ps_state != RUNNING && cmdloop(cm) == 0) {
cmd_quit(0, NULL, &ps);
}
if (ps.ps_state == TERMINATED)
break;
if (wait(&status) == 0)
err(1, "wait");
if (WIFEXITED(status)) {
if ((ps.ps_flags & PSF_KILL) == 0) {
ps.ps_state = NONE;
} else {
ps.ps_state = TERMINATED;
}
fprintf(stderr, "process exited with status %d\n",
WEXITSTATUS(status));
continue;
}
if (WIFSIGNALED(status)) {
signum = WTERMSIG(status);
stopped = 0;
} else {
signum = WSTOPSIG(status);
stopped = 1;
}
cont = 0;
if (stopped)
cont = bkpt_check(&ps);
process_signal(&ps, signum, stopped, cont);
}
cmdend(cm);
sym_destroy(&ps);
return (0);
}
/* XXX - move to some other file. */
int
read_from_pid(pid_t pid, off_t from, void *to, size_t size)
{
struct ptrace_io_desc piod;
piod.piod_op = PIOD_READ_D;
piod.piod_offs = (void *)(long)from;
piod.piod_addr = to;
piod.piod_len = size;
return (ptrace(PT_IO, pid, (caddr_t)&piod, 0));
}
int
write_to_pid(pid_t pid, off_t to, void *from, size_t size)
{
struct ptrace_io_desc piod;
piod.piod_op = PIOD_WRITE_D;
piod.piod_offs = (void *)(long)to;
piod.piod_addr = from;
piod.piod_len = size;
return (ptrace(PT_IO, pid, (caddr_t)&piod, 0));
}
static int
cmd_show_registers(int argc, char **argv, void *arg)
{
struct pstate *ps = arg;
char buf[256];
int i;
reg *rg;
if (ps->ps_state != STOPPED) {
fprintf(stderr, "process not stopped\n");
return 0;
}
rg = alloca(sizeof(*rg) * md_def.nregs);
if (md_getregs(ps, rg))
err(1, "can't get registers");
for (i = 0; i < md_def.nregs; i++)
printf("%s:\t0x%.*lx\t%s\n", md_def.md_reg_names[i],
(int)(sizeof(reg) * 2), (long)rg[i],
sym_print(ps, rg[i], buf, sizeof(buf)));
return 0;
}
static int
cmd_show_backtrace(int argc, char **argv, void *arg)
{
struct pstate *ps = arg;
int i;
if (ps->ps_state != STOPPED) {
fprintf(stderr, "process not stopped\n");
return 0;
}
/* no more than 100 frames */
for (i = 0; i < 100; i++) {
struct md_frame mfr;
char namebuf[1024], *name;
reg offs;
int j;
mfr.nargs = -1;
if (md_getframe(ps, i, &mfr))
break;
name = sym_name_and_offset(ps, mfr.pc, namebuf,
sizeof(namebuf), &offs);
if (name == NULL) {
snprintf(namebuf, sizeof(namebuf), "0x%lx", mfr.pc);
name = namebuf;
offs = 0;
}
printf("%s(", name);
for (j = 0; j < mfr.nargs; j++) {
printf("0x%lx", mfr.args[j]);
if (j < mfr.nargs - 1)
printf(", ");
}
if (offs == 0) {
printf(")\n");
} else {
printf(")+0x%lx\n", offs);
}
}
return 0;
}
static int
cmd_quit(int argc, char **argv, void *arg)
{
struct pstate *ps = arg;
ps->ps_flags |= PSF_KILL;
if (process_kill(ps))
return 1;
ps->ps_state = TERMINATED;
return 1;
}
/*
* Perform command completion.
* Pretty simple. if there are spaces in "buf", the last string is a symbol
* otherwise it's a command.
*/
int
cmd_complt(char *buf, size_t buflen)
{
struct clit *match;
char *start;
int command;
int i, j, len;
int onlymatch;
command = (strchr(buf, ' ') == NULL);
if (!command) {
/* XXX - can't handle symbols yet. */
return -1;
}
start = buf;
len = strlen(buf);
match = NULL;
for (i = 0; i < sizeof(cmds) / sizeof(cmds[i]); i++) {
if (strncmp(start, cmds[i].cmd, len) == 0) {
struct clit *cmdp;
cmdp = &cmds[i];
if (match == NULL) {
onlymatch = 1;
match = cmdp;
strlcpy(buf, match->cmd, buflen);
continue;
}
onlymatch = 0;
for (j = len; j < buflen; j++) {
if (buf[j] != cmdp->cmd[j]) {
buf[j] = '\0';
break;
}
if (cmdp->cmd[j] == '\0')
break;
}
}
}
/*
* Be nice. If there could be arguments for this command and it's
* the only match append a space.
*/
if (match && onlymatch /*&& match->maxargc > 0*/)
strlcat(buf, " ", buflen);
return (match && onlymatch) ? 0 : -1;
}
/*
* The "stadard" wrapper
*/
void *
emalloc(size_t sz)
{
void *ret;
if ((ret = malloc(sz)) == NULL)
err(1, "malloc");
return (ret);
}