blob: 08e3397693f251ea505411f484508c44ec8b9e44 [file] [log] [blame]
Dmitry V. Levin7ccc1442014-12-11 19:25:02 +00001#include "defs.h"
2
3#include <sys/wait.h>
4
5#ifndef __WNOTHREAD
6# define __WNOTHREAD 0x20000000
7#endif
8#ifndef __WALL
9# define __WALL 0x40000000
10#endif
11#ifndef __WCLONE
12# define __WCLONE 0x80000000
13#endif
14
15#include "xlat/wait4_options.h"
16
17#if !defined WCOREFLAG && defined WCOREFLG
18# define WCOREFLAG WCOREFLG
19#endif
20#ifndef WCOREFLAG
21# define WCOREFLAG 0x80
22#endif
23#ifndef WCOREDUMP
24# define WCOREDUMP(status) ((status) & 0200)
25#endif
26#ifndef W_STOPCODE
27# define W_STOPCODE(sig) ((sig) << 8 | 0x7f)
28#endif
29#ifndef W_EXITCODE
30# define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
31#endif
Dmitry V. Levind8b34042015-02-12 22:43:02 +000032#ifndef W_CONTINUED
33# define W_CONTINUED 0xffff
34#endif
35
Dmitry V. Levinfadf3792015-02-13 00:26:38 +000036#include "ptrace.h"
Dmitry V. Levind8b34042015-02-12 22:43:02 +000037#include "xlat/ptrace_events.h"
Dmitry V. Levin7ccc1442014-12-11 19:25:02 +000038
39static int
40printstatus(int status)
41{
42 int exited = 0;
43
44 /*
45 * Here is a tricky presentation problem. This solution
46 * is still not entirely satisfactory but since there
47 * are no wait status constructors it will have to do.
48 */
49 if (WIFSTOPPED(status)) {
Dmitry V. Levind8b34042015-02-12 22:43:02 +000050 int sig = WSTOPSIG(status);
51 tprintf("[{WIFSTOPPED(s) && WSTOPSIG(s) == %s%s}",
52 signame(sig & 0x7f),
53 sig & 0x80 ? " | 0x80" : "");
54 status &= ~W_STOPCODE(sig);
Dmitry V. Levin7ccc1442014-12-11 19:25:02 +000055 }
56 else if (WIFSIGNALED(status)) {
57 tprintf("[{WIFSIGNALED(s) && WTERMSIG(s) == %s%s}",
58 signame(WTERMSIG(status)),
59 WCOREDUMP(status) ? " && WCOREDUMP(s)" : "");
60 status &= ~(W_EXITCODE(0, WTERMSIG(status)) | WCOREFLAG);
61 }
62 else if (WIFEXITED(status)) {
63 tprintf("[{WIFEXITED(s) && WEXITSTATUS(s) == %d}",
64 WEXITSTATUS(status));
65 exited = 1;
66 status &= ~W_EXITCODE(WEXITSTATUS(status), 0);
67 }
Dmitry V. Levind8b34042015-02-12 22:43:02 +000068#ifdef WIFCONTINUED
69 else if (WIFCONTINUED(status)) {
70 tprints("[{WIFCONTINUED(s)}");
71 status &= ~W_CONTINUED;
72 }
73#endif
Dmitry V. Levin7ccc1442014-12-11 19:25:02 +000074 else {
75 tprintf("[%#x]", status);
76 return 0;
77 }
78
Dmitry V. Levind8b34042015-02-12 22:43:02 +000079 if (status) {
80 unsigned int event = (unsigned int) status >> 16;
81 if (event) {
82 tprints(" | ");
83 printxval(ptrace_events, event, "PTRACE_EVENT_???");
84 tprints(" << 16");
85 status &= 0xffff;
86 }
87 if (status)
88 tprintf(" | %#x", status);
89 }
90 tprints("]");
Dmitry V. Levin7ccc1442014-12-11 19:25:02 +000091
92 return exited;
93}
94
95static int
96printwaitn(struct tcb *tcp, int n, int bitness)
97{
98 int status;
99
100 if (entering(tcp)) {
101 /* On Linux, kernel-side pid_t is typedef'ed to int
102 * on all arches. Also, glibc-2.8 truncates wait3 and wait4
103 * pid argument to int on 64bit arches, producing,
104 * for example, wait4(4294967295, ...) instead of -1
105 * in strace. We have to use int here, not long.
106 */
107 int pid = tcp->u_arg[0];
108 tprintf("%d, ", pid);
109 } else {
110 /* status */
111 if (!tcp->u_arg[1])
112 tprints("NULL");
113 else if (syserror(tcp) || tcp->u_rval == 0)
114 tprintf("%#lx", tcp->u_arg[1]);
115 else if (umove(tcp, tcp->u_arg[1], &status) < 0)
116 tprints("[?]");
117 else
118 printstatus(status);
119 /* options */
120 tprints(", ");
121 printflags(wait4_options, tcp->u_arg[2], "W???");
122 if (n == 4) {
123 tprints(", ");
124 /* usage */
125 if (!tcp->u_arg[3])
126 tprints("NULL");
127 else if (tcp->u_rval > 0) {
128#ifdef ALPHA
129 if (bitness)
130 printrusage32(tcp, tcp->u_arg[3]);
131 else
132#endif
133 printrusage(tcp, tcp->u_arg[3]);
134 }
135 else
136 tprintf("%#lx", tcp->u_arg[3]);
137 }
138 }
139 return 0;
140}
141
142int
143sys_waitpid(struct tcb *tcp)
144{
145 return printwaitn(tcp, 3, 0);
146}
147
148int
149sys_wait4(struct tcb *tcp)
150{
151 return printwaitn(tcp, 4, 0);
152}
153
154#ifdef ALPHA
155int
156sys_osf_wait4(struct tcb *tcp)
157{
158 return printwaitn(tcp, 4, 1);
159}
160#endif
161
162#include "xlat/waitid_types.h"
163
164int
165sys_waitid(struct tcb *tcp)
166{
167 if (entering(tcp)) {
168 printxval(waitid_types, tcp->u_arg[0], "P_???");
169 tprintf(", %ld, ", tcp->u_arg[1]);
170 }
171 else {
172 /* siginfo */
173 printsiginfo_at(tcp, tcp->u_arg[2]);
174 /* options */
175 tprints(", ");
176 printflags(wait4_options, tcp->u_arg[3], "W???");
177 if (tcp->s_ent->nargs > 4) {
178 /* usage */
179 tprints(", ");
180 if (!tcp->u_arg[4])
181 tprints("NULL");
182 else if (tcp->u_error)
183 tprintf("%#lx", tcp->u_arg[4]);
184 else
185 printrusage(tcp, tcp->u_arg[4]);
186 }
187 }
188 return 0;
189}