Annotation of src/usr.bin/pmdb/process.c, Revision 1.1
1.1 ! art 1: /* $PMDB: process.c,v 1.19 2002/03/11 23:39:49 art Exp $ */
! 2: /*
! 3: * Copyright (c) 2002 Artur Grabowski <art@openbsd.org>
! 4: * All rights reserved.
! 5: *
! 6: * Redistribution and use in source and binary forms, with or without
! 7: * modification, are permitted provided that the following conditions
! 8: * are met:
! 9: *
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. The name of the author may not be used to endorse or promote products
! 13: * derived from this software without specific prior written permission.
! 14: *
! 15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
! 16: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
! 17: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
! 18: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
! 19: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 20: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! 21: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! 22: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 23: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! 24: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 25: */
! 26:
! 27: #include <sys/types.h>
! 28: #include <sys/ptrace.h>
! 29: #include <sys/wait.h>
! 30: #include <stdlib.h>
! 31: #include <stdio.h>
! 32: #include <signal.h>
! 33: #include <unistd.h>
! 34: #include <err.h>
! 35:
! 36: #include "pmdb.h"
! 37: #include "symbol.h"
! 38: #include "break.h"
! 39:
! 40: int
! 41: process_load(struct pstate *ps)
! 42: {
! 43: int status;
! 44:
! 45: if (ps->ps_state == LOADED)
! 46: return (0);
! 47:
! 48: switch (ps->ps_pid = fork()) {
! 49: case 0:
! 50: if (ptrace(PT_TRACE_ME, getpid(), NULL, 0) != 0)
! 51: err(1, "ptrace(PT_TRACE_ME)");
! 52: execvp(*ps->ps_argv, ps->ps_argv);
! 53: err(1, "exec");
! 54: /* NOTREACHED */
! 55: case -1:
! 56: err(1, "fork");
! 57: /* NOTREACHED */
! 58: default:
! 59: break;
! 60: }
! 61:
! 62: if ((ps->ps_flags & PSF_SYMBOLS) == 0) {
! 63: sym_init_exec(ps, ps->ps_argv[0]);
! 64: ps->ps_flags |= PSF_SYMBOLS;
! 65: }
! 66:
! 67: if (wait(&status) == 0)
! 68: err(1, "wait");
! 69:
! 70: ps->ps_state = LOADED;
! 71: return 0;
! 72: }
! 73:
! 74: int
! 75: process_kill(struct pstate *ps)
! 76: {
! 77: switch(ps->ps_state) {
! 78: case LOADED:
! 79: case RUNNING:
! 80: case STOPPED:
! 81: if (ptrace(PT_KILL, ps->ps_pid, NULL, 0) != 0)
! 82: err(1, "ptrace(PT_KILL)");
! 83: return 1;
! 84: default:
! 85: return 0;
! 86: }
! 87: }
! 88:
! 89: int
! 90: cmd_process_kill(int argc, char **argv, void *arg)
! 91: {
! 92: struct pstate *ps = arg;
! 93:
! 94: process_kill(ps);
! 95:
! 96: return 1;
! 97: }
! 98:
! 99: int
! 100: process_bkpt_main(struct pstate *ps, void *arg)
! 101: {
! 102: sym_update(ps);
! 103:
! 104: return BKPT_DEL_CONT;
! 105: }
! 106:
! 107: int
! 108: cmd_process_run(int argc, char **argv, void *arg)
! 109: {
! 110: struct pstate *ps = arg;
! 111:
! 112: if (ps->ps_state == NONE) {
! 113: reg main_addr;
! 114:
! 115: process_load(ps);
! 116: if (sym_lookup(ps, "main", &main_addr))
! 117: warnx("no main");
! 118: else if (bkpt_add_cb(ps, main_addr, process_bkpt_main, NULL))
! 119: warn("no bkpt at main 0x%lx", main_addr);
! 120: }
! 121:
! 122: if (ps->ps_state != LOADED) {
! 123: fprintf(stderr, "Process already running.\n");
! 124: return 0;
! 125: }
! 126:
! 127: /*
! 128: * XXX - there isn't really any difference between STOPPED and
! 129: * LOADED, we should probably get rid of one.
! 130: */
! 131: ps->ps_state = STOPPED;
! 132: ps->ps_signum = 0;
! 133:
! 134: return (cmd_process_cont(argc, argv, arg));
! 135: }
! 136:
! 137: int
! 138: cmd_process_cont(int argc, char **argv, void *arg)
! 139: {
! 140: struct pstate *ps = arg;
! 141: int signum;
! 142: int req = (ps->ps_flags & PSF_STEP) ? PT_STEP : PT_CONTINUE;
! 143:
! 144: if (ps->ps_state != STOPPED) {
! 145: fprintf(stderr, "Process not loaded and stopped %d\n",
! 146: ps->ps_state);
! 147: return (0);
! 148: }
! 149:
! 150: /* Catch SIGINT and SIGTRAP, pass all other signals. */
! 151: switch (ps->ps_signum) {
! 152: case SIGINT:
! 153: case SIGTRAP:
! 154: signum = 0;
! 155: break;
! 156: default:
! 157: signum = ps->ps_signum;
! 158: break;
! 159: }
! 160:
! 161: if (ptrace(req, ps->ps_pid, (caddr_t)ps->ps_npc, signum) != 0) {
! 162: err(1, "ptrace(%s)", req == PT_STEP ? "PT_STEP":"PT_CONTINUE");
! 163: }
! 164:
! 165: ps->ps_state = RUNNING;
! 166: ps->ps_npc = 1;
! 167:
! 168: return (1);
! 169: }
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