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Fix decoding of pid_t argument of prlimit64 syscall
[strace] / resource.c
1 /*
2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. The name of the author may not be used to endorse or promote products
17  *    derived from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30
31 #include "defs.h"
32 #include <sys/resource.h>
33
34 #include "xlat/resources.h"
35
36 static const char *
37 sprint_rlim64(uint64_t lim)
38 {
39         static char buf[sizeof(uint64_t)*3 + sizeof("*1024")];
40
41         if (lim == UINT64_MAX)
42                 return "RLIM64_INFINITY";
43
44         if (lim > 1024 && lim % 1024 == 0)
45                 sprintf(buf, "%" PRIu64 "*1024", lim / 1024);
46         else
47                 sprintf(buf, "%" PRIu64, lim);
48         return buf;
49 }
50
51 static void
52 print_rlimit64(struct tcb *tcp, unsigned long addr)
53 {
54         struct rlimit_64 {
55                 uint64_t rlim_cur;
56                 uint64_t rlim_max;
57         } rlim;
58
59         if (!umove_or_printaddr(tcp, addr, &rlim)) {
60                 tprintf("{rlim_cur=%s,", sprint_rlim64(rlim.rlim_cur));
61                 tprintf(" rlim_max=%s}", sprint_rlim64(rlim.rlim_max));
62         }
63 }
64
65 #if !defined(current_wordsize) || current_wordsize == 4
66
67 static const char *
68 sprint_rlim32(uint32_t lim)
69 {
70         static char buf[sizeof(uint32_t)*3 + sizeof("*1024")];
71
72         if (lim == UINT32_MAX)
73                 return "RLIM_INFINITY";
74
75         if (lim > 1024 && lim % 1024 == 0)
76                 sprintf(buf, "%" PRIu32 "*1024", lim / 1024);
77         else
78                 sprintf(buf, "%" PRIu32, lim);
79         return buf;
80 }
81
82 static void
83 print_rlimit32(struct tcb *tcp, unsigned long addr)
84 {
85         struct rlimit_32 {
86                 uint32_t rlim_cur;
87                 uint32_t rlim_max;
88         } rlim;
89
90         if (!umove_or_printaddr(tcp, addr, &rlim)) {
91                 tprintf("{rlim_cur=%s,", sprint_rlim32(rlim.rlim_cur));
92                 tprintf(" rlim_max=%s}", sprint_rlim32(rlim.rlim_max));
93         }
94 }
95
96 static void
97 decode_rlimit(struct tcb *tcp, unsigned long addr)
98 {
99 # if defined(X86_64) || defined(X32)
100         /*
101          * i386 is the only personality on X86_64 and X32
102          * with 32-bit rlim_t.
103          * When current_personality is X32, current_wordsize
104          * equals to 4 but rlim_t is 64-bit.
105          */
106         if (current_personality == 1)
107 # else
108         if (current_wordsize == 4)
109 # endif
110                 print_rlimit32(tcp, addr);
111         else
112                 print_rlimit64(tcp, addr);
113 }
114
115 #else /* defined(current_wordsize) && current_wordsize != 4 */
116
117 # define decode_rlimit print_rlimit64
118
119 #endif
120
121 SYS_FUNC(getrlimit)
122 {
123         if (entering(tcp)) {
124                 printxval(resources, tcp->u_arg[0], "RLIMIT_???");
125                 tprints(", ");
126         }
127         else {
128                 decode_rlimit(tcp, tcp->u_arg[1]);
129         }
130         return 0;
131 }
132
133 SYS_FUNC(setrlimit)
134 {
135         printxval(resources, tcp->u_arg[0], "RLIMIT_???");
136         tprints(", ");
137         decode_rlimit(tcp, tcp->u_arg[1]);
138
139         return RVAL_DECODED;
140 }
141
142 SYS_FUNC(prlimit64)
143 {
144         if (entering(tcp)) {
145                 tprintf("%d, ", (int) tcp->u_arg[0]);
146                 printxval(resources, tcp->u_arg[1], "RLIMIT_???");
147                 tprints(", ");
148                 print_rlimit64(tcp, tcp->u_arg[2]);
149                 tprints(", ");
150         } else {
151                 print_rlimit64(tcp, tcp->u_arg[3]);
152         }
153         return 0;
154 }
155
156 #include "xlat/usagewho.h"
157
158 SYS_FUNC(getrusage)
159 {
160         if (entering(tcp)) {
161                 printxval(usagewho, tcp->u_arg[0], "RUSAGE_???");
162                 tprints(", ");
163         }
164         else
165                 printrusage(tcp, tcp->u_arg[1]);
166         return 0;
167 }
168
169 #ifdef ALPHA
170 SYS_FUNC(osf_getrusage)
171 {
172         if (entering(tcp)) {
173                 printxval(usagewho, tcp->u_arg[0], "RUSAGE_???");
174                 tprints(", ");
175         }
176         else
177                 printrusage32(tcp, tcp->u_arg[1]);
178         return 0;
179 }
180 #endif /* ALPHA */
181
182 #include "xlat/priorities.h"
183
184 SYS_FUNC(getpriority)
185 {
186         printxval(priorities, tcp->u_arg[0], "PRIO_???");
187         tprintf(", %d", (int) tcp->u_arg[1]);
188
189         return RVAL_DECODED;
190 }
191
192 SYS_FUNC(setpriority)
193 {
194         printxval(priorities, tcp->u_arg[0], "PRIO_???");
195         tprintf(", %d, %d", (int) tcp->u_arg[1], (int) tcp->u_arg[2]);
196
197         return RVAL_DECODED;
198 }