1 /* 2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk (at) cs.few.eur.nl> 3 * Copyright (c) 1993 Branko Lankester <branko (at) hacktic.nl> 4 * Copyright (c) 1993-1996 Rick Sladkey <jrs (at) world.std.com> 5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert (at) cistron.nl> 6 * Copyright (c) 2002-2004 Roland McGrath <roland (at) redhat.com> 7 * Copyright (c) 2004 Ulrich Drepper <drepper (at) redhat.com> 8 * Copyright (c) 2009-2013 Denys Vlasenko <dvlasenk (at) redhat.com> 9 * Copyright (c) 2014-2015 Dmitry V. Levin <ldv (at) altlinux.org> 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "defs.h" 36 37 #include <sys/wait.h> 38 39 #include "xlat/wait4_options.h" 40 41 #if !defined WCOREFLAG && defined WCOREFLG 42 # define WCOREFLAG WCOREFLG 43 #endif 44 #ifndef WCOREFLAG 45 # define WCOREFLAG 0x80 46 #endif 47 #ifndef WCOREDUMP 48 # define WCOREDUMP(status) ((status) & 0200) 49 #endif 50 #ifndef W_STOPCODE 51 # define W_STOPCODE(sig) ((sig) << 8 | 0x7f) 52 #endif 53 #ifndef W_EXITCODE 54 # define W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) 55 #endif 56 #ifndef W_CONTINUED 57 # define W_CONTINUED 0xffff 58 #endif 59 60 #include "ptrace.h" 61 #include "xlat/ptrace_events.h" 62 63 static int 64 printstatus(int status) 65 { 66 int exited = 0; 67 68 /* 69 * Here is a tricky presentation problem. This solution 70 * is still not entirely satisfactory but since there 71 * are no wait status constructors it will have to do. 72 */ 73 if (WIFSTOPPED(status)) { 74 int sig = WSTOPSIG(status); 75 tprintf("[{WIFSTOPPED(s) && WSTOPSIG(s) == %s%s}", 76 signame(sig & 0x7f), 77 sig & 0x80 ? " | 0x80" : ""); 78 status &= ~W_STOPCODE(sig); 79 } 80 else if (WIFSIGNALED(status)) { 81 tprintf("[{WIFSIGNALED(s) && WTERMSIG(s) == %s%s}", 82 signame(WTERMSIG(status)), 83 WCOREDUMP(status) ? " && WCOREDUMP(s)" : ""); 84 status &= ~(W_EXITCODE(0, WTERMSIG(status)) | WCOREFLAG); 85 } 86 else if (WIFEXITED(status)) { 87 tprintf("[{WIFEXITED(s) && WEXITSTATUS(s) == %d}", 88 WEXITSTATUS(status)); 89 exited = 1; 90 status &= ~W_EXITCODE(WEXITSTATUS(status), 0); 91 } 92 #ifdef WIFCONTINUED 93 else if (WIFCONTINUED(status)) { 94 tprints("[{WIFCONTINUED(s)}"); 95 status &= ~W_CONTINUED; 96 } 97 #endif 98 else { 99 tprintf("[%#x]", status); 100 return 0; 101 } 102 103 if (status) { 104 unsigned int event = (unsigned int) status >> 16; 105 if (event) { 106 tprints(" | "); 107 printxval(ptrace_events, event, "PTRACE_EVENT_???"); 108 tprints(" << 16"); 109 status &= 0xffff; 110 } 111 if (status) 112 tprintf(" | %#x", status); 113 } 114 tprints("]"); 115 116 return exited; 117 } 118 119 static int 120 printwaitn(struct tcb *tcp, int n, int bitness) 121 { 122 int status; 123 124 if (entering(tcp)) { 125 /* On Linux, kernel-side pid_t is typedef'ed to int 126 * on all arches. Also, glibc-2.8 truncates wait3 and wait4 127 * pid argument to int on 64bit arches, producing, 128 * for example, wait4(4294967295, ...) instead of -1 129 * in strace. We have to use int here, not long. 130 */ 131 int pid = tcp->u_arg[0]; 132 tprintf("%d, ", pid); 133 } else { 134 /* status */ 135 if (tcp->u_rval == 0) 136 printaddr(tcp->u_arg[1]); 137 else if (!umove_or_printaddr(tcp, tcp->u_arg[1], &status)) 138 printstatus(status); 139 /* options */ 140 tprints(", "); 141 printflags(wait4_options, tcp->u_arg[2], "W???"); 142 if (n == 4) { 143 tprints(", "); 144 /* usage */ 145 if (tcp->u_rval > 0) { 146 #ifdef ALPHA 147 if (bitness) 148 printrusage32(tcp, tcp->u_arg[3]); 149 else 150 #endif 151 printrusage(tcp, tcp->u_arg[3]); 152 } 153 else 154 printaddr(tcp->u_arg[3]); 155 } 156 } 157 return 0; 158 } 159 160 SYS_FUNC(waitpid) 161 { 162 return printwaitn(tcp, 3, 0); 163 } 164 165 SYS_FUNC(wait4) 166 { 167 return printwaitn(tcp, 4, 0); 168 } 169 170 #ifdef ALPHA 171 SYS_FUNC(osf_wait4) 172 { 173 return printwaitn(tcp, 4, 1); 174 } 175 #endif 176 177 #include "xlat/waitid_types.h" 178 179 SYS_FUNC(waitid) 180 { 181 if (entering(tcp)) { 182 printxval(waitid_types, tcp->u_arg[0], "P_???"); 183 tprintf(", %ld, ", tcp->u_arg[1]); 184 } else { 185 /* siginfo */ 186 printsiginfo_at(tcp, tcp->u_arg[2]); 187 /* options */ 188 tprints(", "); 189 printflags(wait4_options, tcp->u_arg[3], "W???"); 190 if (tcp->s_ent->nargs > 4) { 191 /* usage */ 192 tprints(", "); 193 printrusage(tcp, tcp->u_arg[4]); 194 } 195 } 196 return 0; 197 } 198
