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Wichert Akkerman76baf7c1999-02-19 00:21:36 +00001/*
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 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000028 */
29
Roland McGrath795edb12005-02-02 04:44:57 +000030#ifdef HAVE_CONFIG_H
Denys Vlasenko329655a2012-02-25 02:42:32 +010031# include "config.h"
Roland McGrath795edb12005-02-02 04:44:57 +000032#endif
Dmitry V. Levin2690fad2013-05-07 08:03:41 +000033
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010034#include <features.h>
Denys Vlasenkoa6d91de2012-03-16 12:02:22 +010035#ifdef HAVE_STDBOOL_H
36# include <stdbool.h>
37#endif
38#include <stdint.h>
39#include <inttypes.h>
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010040#include <sys/types.h>
Denys Vlasenkoa6d91de2012-03-16 12:02:22 +010041#ifdef STDC_HEADERS
42# include <stddef.h>
43#endif
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010044#include <unistd.h>
45#include <stdlib.h>
46#include <stdio.h>
Denys Vlasenko5198ed42013-03-06 23:44:23 +010047/* Open-coding isprint(ch) et al proved more efficient than calling
48 * generalized libc interface. We don't *want* to do non-ASCII anyway.
49 */
50/* #include <ctype.h> */
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010051#include <string.h>
Denys Vlasenkoa6d91de2012-03-16 12:02:22 +010052#include <errno.h>
53#include <signal.h>
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010054#include <time.h>
55#include <sys/time.h>
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010056#include <sys/syscall.h>
Roland McGrathe6d3a292003-01-14 09:46:18 +000057
Denys Vlasenko29898142012-03-15 15:02:49 +010058#ifndef HAVE_STRERROR
59const char *strerror(int);
60#endif
Denys Vlasenko29898142012-03-15 15:02:49 +010061#ifndef HAVE_STPCPY
62/* Some libc have stpcpy, some don't. Sigh...
63 * Roll our private implementation...
64 */
65#undef stpcpy
66#define stpcpy strace_stpcpy
67extern char *stpcpy(char *dst, const char *src);
68#endif
69
70#if !defined __GNUC__
71# define __attribute__(x) /*nothing*/
72#endif
73
Denys Vlasenko513e9c22012-03-21 14:39:22 +010074#ifndef offsetof
75# define offsetof(type, member) \
76 (((char *) &(((type *) NULL)->member)) - ((char *) (type *) NULL))
77#endif
78
Denys Vlasenko29898142012-03-15 15:02:49 +010079#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
80
Mike Frysingerd648f292013-05-01 23:35:30 -040081/* macros */
82#ifndef MAX
83# define MAX(a, b) (((a) > (b)) ? (a) : (b))
84#endif
85#ifndef MIN
86# define MIN(a, b) (((a) < (b)) ? (a) : (b))
87#endif
88#define CLAMP(val, min, max) MIN(MAX(min, val), max)
89
Denys Vlasenkoe4cc7c52012-03-23 11:29:01 +010090/* Glibc has an efficient macro for sigemptyset
91 * (it just does one or two assignments of 0 to internal vector of longs).
92 */
93#if defined(__GLIBC__) && defined(__sigemptyset) && !defined(sigemptyset)
94# define sigemptyset __sigemptyset
95#endif
96
Denys Vlasenkod9560c12011-08-19 17:41:28 +020097/* Configuration section */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000098#ifndef DEFAULT_STRLEN
Denys Vlasenko041b3ee2011-08-18 12:48:56 +020099/* default maximum # of bytes printed in `printstr', change with -s switch */
Denys Vlasenko329655a2012-02-25 02:42:32 +0100100# define DEFAULT_STRLEN 32
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000101#endif
102#ifndef DEFAULT_ACOLUMN
Denys Vlasenko329655a2012-02-25 02:42:32 +0100103# define DEFAULT_ACOLUMN 40 /* default alignment column for results */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000104#endif
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100105/*
106 * Maximum number of args to a syscall.
Denys Vlasenkod9560c12011-08-19 17:41:28 +0200107 *
Denys Vlasenkoaa925db2012-02-25 15:19:02 +0100108 * Make sure that all entries in all syscallent.h files have nargs <= MAX_ARGS!
Dmitry V. Levin2690fad2013-05-07 08:03:41 +0000109 * linux/<ARCH>/syscallent*.h:
110 * all have nargs <= 6 except mips o32 which has nargs <= 7.
Denys Vlasenkod9560c12011-08-19 17:41:28 +0200111 */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000112#ifndef MAX_ARGS
Dmitry V. Levin2690fad2013-05-07 08:03:41 +0000113# ifdef LINUX_MIPSO32
114# define MAX_ARGS 7
115# else
116# define MAX_ARGS 6
117# endif
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000118#endif
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100119/* default sorting method for call profiling */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000120#ifndef DEFAULT_SORTBY
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100121# define DEFAULT_SORTBY "time"
John Hughes58265892001-10-18 15:13:53 +0000122#endif
Denys Vlasenkod27809c2013-02-12 12:50:10 +0100123/*
124 * Experimental code using PTRACE_SEIZE can be enabled here.
Denys Vlasenko9472a272013-02-12 11:43:46 +0100125 * This needs Linux kernel 3.4.x or later to work.
126 */
127#define USE_SEIZE 1
Denys Vlasenko05f32512013-02-26 12:00:34 +0100128/* To force NOMMU build, set to 1 */
Denys Vlasenko5c9d8f42013-02-19 15:30:12 +0100129#define NOMMU_SYSTEM 0
Denys Vlasenko76da8312013-07-16 12:18:59 +0200130/*
131 * Set to 1 to use speed-optimized vfprintf implementation.
132 * It results in strace using about 5% less CPU in user space
133 * (compared to glibc version).
134 * But strace spends a lot of time in kernel space,
135 * so overall it does not appear to be a significant win.
136 * Thus disabled by default.
137 */
138#define USE_CUSTOM_PRINTF 0
Denys Vlasenko5c9d8f42013-02-19 15:30:12 +0100139
Denys Vlasenko47932212013-06-30 23:53:49 +0200140#ifndef ERESTARTSYS
141# define ERESTARTSYS 512
142#endif
143#ifndef ERESTARTNOINTR
144# define ERESTARTNOINTR 513
145#endif
146#ifndef ERESTARTNOHAND
147# define ERESTARTNOHAND 514
148#endif
149#ifndef ERESTART_RESTARTBLOCK
150# define ERESTART_RESTARTBLOCK 516
151#endif
152
Denys Vlasenko9472a272013-02-12 11:43:46 +0100153#if defined(SPARC) || defined(SPARC64)
Denys Vlasenko329655a2012-02-25 02:42:32 +0100154# define PERSONALITY0_WORDSIZE 4
155# define PERSONALITY1_WORDSIZE 4
Denys Vlasenko329655a2012-02-25 02:42:32 +0100156# if defined(SPARC64)
Denys Vlasenko329655a2012-02-25 02:42:32 +0100157# define SUPPORTED_PERSONALITIES 3
158# define PERSONALITY2_WORDSIZE 8
159# else
Denys Vlasenko329655a2012-02-25 02:42:32 +0100160# define SUPPORTED_PERSONALITIES 2
161# endif /* SPARC64 */
Denys Vlasenko9472a272013-02-12 11:43:46 +0100162#endif /* SPARC[64] */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000163
Michal Ludvig0e035502002-09-23 15:41:01 +0000164#ifdef X86_64
H.J. Lu35be5812012-04-16 13:00:01 +0200165# define SUPPORTED_PERSONALITIES 3
Denys Vlasenko329655a2012-02-25 02:42:32 +0100166# define PERSONALITY0_WORDSIZE 8
167# define PERSONALITY1_WORDSIZE 4
H.J. Lu35be5812012-04-16 13:00:01 +0200168# define PERSONALITY2_WORDSIZE 4
Roland McGrathee9d4352002-12-18 04:16:10 +0000169#endif
170
H.J. Lu085e4282012-04-17 11:05:04 -0700171#ifdef X32
H.J. Lu085e4282012-04-17 11:05:04 -0700172# define SUPPORTED_PERSONALITIES 2
173# define PERSONALITY0_WORDSIZE 4
174# define PERSONALITY1_WORDSIZE 4
175#endif
176
Roland McGrath56703312008-05-20 01:35:55 +0000177#ifdef ARM
Denys Vlasenko7270de52013-02-21 15:46:34 +0100178/* one personality */
Roland McGrath56703312008-05-20 01:35:55 +0000179#endif
180
Steve McIntyre890a5ca2012-11-10 11:24:48 +0000181#ifdef AARCH64
Steve McIntyre890a5ca2012-11-10 11:24:48 +0000182/* The existing ARM personality, then AArch64 */
183# define SUPPORTED_PERSONALITIES 2
184# define PERSONALITY0_WORDSIZE 4
185# define PERSONALITY1_WORDSIZE 8
Steve McIntyre890a5ca2012-11-10 11:24:48 +0000186# define DEFAULT_PERSONALITY 1
187#endif
188
Andreas Schwabd69fa492010-07-12 21:39:57 +0200189#ifdef POWERPC64
Denys Vlasenko329655a2012-02-25 02:42:32 +0100190# define SUPPORTED_PERSONALITIES 2
191# define PERSONALITY0_WORDSIZE 8
192# define PERSONALITY1_WORDSIZE 4
Andreas Schwabd69fa492010-07-12 21:39:57 +0200193#endif
194
Chris Metcalf0b99a8a2013-02-05 17:48:33 +0100195#ifdef TILE
Chris Metcalf0b99a8a2013-02-05 17:48:33 +0100196# define SUPPORTED_PERSONALITIES 2
197# define PERSONALITY0_WORDSIZE 8
198# define PERSONALITY1_WORDSIZE 4
199# ifdef __tilepro__
Chris Metcalf0b99a8a2013-02-05 17:48:33 +0100200# define DEFAULT_PERSONALITY 1
201# endif
202#endif
203
Denys Vlasenko9472a272013-02-12 11:43:46 +0100204#ifndef SUPPORTED_PERSONALITIES
205# define SUPPORTED_PERSONALITIES 1
206#endif
207#ifndef DEFAULT_PERSONALITY
208# define DEFAULT_PERSONALITY 0
209#endif
Denys Vlasenko9fd4f962012-03-19 09:36:42 +0100210#ifndef PERSONALITY0_WORDSIZE
James Hogan3b09ebe2014-05-02 14:15:41 +0100211# define PERSONALITY0_WORDSIZE SIZEOF_LONG
Denys Vlasenko9fd4f962012-03-19 09:36:42 +0100212#endif
213
Denys Vlasenkoa9fe13c2013-02-22 13:26:10 +0100214typedef struct sysent {
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100215 unsigned nargs;
216 int sys_flags;
217 int (*sys_func)();
218 const char *sys_name;
Denys Vlasenkoa9fe13c2013-02-22 13:26:10 +0100219} struct_sysent;
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100220
Denys Vlasenkoa9fe13c2013-02-22 13:26:10 +0100221typedef struct ioctlent {
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100222 const char *symbol;
Dmitry V. Levinc7afb482015-01-19 18:44:21 +0000223 unsigned int code;
Denys Vlasenkoa9fe13c2013-02-22 13:26:10 +0100224} struct_ioctlent;
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100225
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000226/* Trace Control Block */
227struct tcb {
Denys Vlasenkod9ec1412011-08-20 01:39:05 +0200228 int flags; /* See below for TCB_ values */
Denys Vlasenkofadbf662013-06-26 14:14:29 +0200229 int pid; /* If 0, this tcb is free */
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100230 int qual_flg; /* qual_flags[scno] or DEFAULT_QUAL_FLAGS + RAW */
Denys Vlasenko92d443c2011-08-25 00:25:08 +0200231 int u_error; /* Error code */
232 long scno; /* System call number */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000233 long u_arg[MAX_ARGS]; /* System call arguments */
H.J. Lu35be5812012-04-16 13:00:01 +0200234#if defined(LINUX_MIPSN32) || defined(X32)
Denys Vlasenko9472a272013-02-12 11:43:46 +0100235 long long ext_arg[MAX_ARGS];
H.J. Ludd0130b2012-04-16 12:16:45 +0200236 long long u_lrval; /* long long return value */
237#endif
Denys Vlasenko9472a272013-02-12 11:43:46 +0100238 long u_rval; /* Return value */
Dmitry V. Levina5a839a2011-12-23 00:50:49 +0000239#if SUPPORTED_PERSONALITIES > 1
Dmitry V. Levin3ed5d022014-09-10 13:46:04 +0000240 unsigned int currpers; /* Personality at the time of scno update */
Dmitry V. Levina5a839a2011-12-23 00:50:49 +0000241#endif
Andreas Schwabccdff482009-10-27 16:27:13 +0100242 int curcol; /* Output column for this process */
Denys Vlasenko92d443c2011-08-25 00:25:08 +0200243 FILE *outf; /* Output file for this process */
Wichert Akkerman43a74822000-06-27 17:33:32 +0000244 const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
Denys Vlasenkoa9fe13c2013-02-22 13:26:10 +0100245 const struct_sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000246 struct timeval stime; /* System time usage as of last process wait */
247 struct timeval dtime; /* Delta for system time usage */
248 struct timeval etime; /* Syscall entry time */
Denys Vlasenkoa61a72e2012-03-17 12:41:27 +0100249 /* Support for tracing forked processes: */
250 long inst[2]; /* Saved clone args (badly named) */
Luca Clementi327064b2013-07-23 00:11:35 -0700251
252#ifdef USE_LIBUNWIND
253 struct UPT_info* libunwind_ui;
254 struct mmap_cache_t* mmap_cache;
255 unsigned int mmap_cache_size;
Masatake YAMATO9bc65612014-04-16 15:33:07 +0900256 unsigned int mmap_cache_generation;
Masatake YAMATOf8e39d72014-04-16 15:33:06 +0900257 struct queue_t* queue;
Luca Clementi327064b2013-07-23 00:11:35 -0700258#endif
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000259};
260
261/* TCB flags */
Denys Vlasenko68269aa2012-03-15 13:02:31 +0100262/* We have attached to this process, but did not see it stopping yet */
Denys Vlasenkofadbf662013-06-26 14:14:29 +0200263#define TCB_STARTUP 0x01
264#define TCB_IGNORE_ONE_SIGSTOP 0x02 /* Next SIGSTOP is to be ignored */
Denys Vlasenkob88f9612011-08-21 18:03:23 +0200265/*
266 * Are we in system call entry or in syscall exit?
267 *
268 * This bit is set after all syscall entry processing is done.
269 * Therefore, this bit will be set when next ptrace stop occurs,
270 * which should be syscall exit stop. Other stops which are possible
271 * directly after syscall entry (death, ptrace event stop)
272 * are simpler and handled without calling trace_syscall(), therefore
273 * the places where TCB_INSYSCALL can be set but we aren't in syscall stop
274 * are limited to trace(), this condition is never observed in trace_syscall()
275 * and below.
276 * The bit is cleared after all syscall exit processing is done.
Denys Vlasenkob88f9612011-08-21 18:03:23 +0200277 *
278 * Use entering(tcp) / exiting(tcp) to check this bit to make code more readable.
279 */
Denys Vlasenkofadbf662013-06-26 14:14:29 +0200280#define TCB_INSYSCALL 0x04
281#define TCB_ATTACHED 0x08 /* We attached to it already */
Dmitry V. Levin23ce9e42015-02-08 13:05:53 +0000282#define TCB_REPRINT 0x10 /* We should reprint this syscall on exit */
283#define TCB_FILTERED 0x20 /* This system call has been filtered out */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000284
285/* qualifier flags */
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100286#define QUAL_TRACE 0x001 /* this system call should be traced */
287#define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */
288#define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */
289#define QUAL_RAW 0x008 /* print all args in hex for this syscall */
290#define QUAL_SIGNAL 0x010 /* report events with this signal */
Denys Vlasenkoc1540fe2013-02-21 16:17:08 +0100291#define QUAL_READ 0x020 /* dump data read on this file descriptor */
292#define QUAL_WRITE 0x040 /* dump data written to this file descriptor */
Denys Vlasenkoa585c9d2013-02-21 16:15:43 +0100293typedef uint8_t qualbits_t;
Denys Vlasenkoc1540fe2013-02-21 16:17:08 +0100294#define UNDEFINED_SCNO 0x100 /* Used only in tcp->qual_flg */
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100295
296#define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000297
298#define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL))
299#define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL)
300#define syserror(tcp) ((tcp)->u_error != 0)
Denys Vlasenko40d63b92013-02-22 13:23:38 +0100301#define verbose(tcp) ((tcp)->qual_flg & QUAL_VERBOSE)
302#define abbrev(tcp) ((tcp)->qual_flg & QUAL_ABBREV)
Grant Edwards8a082772011-04-07 20:25:40 +0000303#define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000304
305struct xlat {
Dmitry V. Levin3ed5d022014-09-10 13:46:04 +0000306 unsigned int val;
Dmitry V. Levin30145dd2010-09-06 22:08:24 +0000307 const char *str;
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000308};
Dmitry V. Levina69ddcb2014-02-05 01:28:45 +0000309#define XLAT(x) { x, #x }
Dmitry V. Levin82b1ea72014-02-05 02:18:52 +0000310#define XLAT_END { 0, NULL }
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000311
Denys Vlasenkof535b542009-01-13 18:30:55 +0000312extern const struct xlat addrfams[];
Dmitry V. Levin43b110b2014-12-06 03:53:16 +0000313extern const struct xlat at_flags[];
Denys Vlasenkof535b542009-01-13 18:30:55 +0000314extern const struct xlat open_access_modes[];
Dmitry V. Levin43b110b2014-12-06 03:53:16 +0000315extern const struct xlat open_mode_flags[];
Denys Vlasenko86738a22013-02-17 14:31:55 +0100316extern const struct xlat whence_codes[];
Denys Vlasenkof535b542009-01-13 18:30:55 +0000317
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000318/* Format of syscall return values */
319#define RVAL_DECIMAL 000 /* decimal format */
320#define RVAL_HEX 001 /* hex format */
321#define RVAL_OCTAL 002 /* octal format */
322#define RVAL_UDECIMAL 003 /* unsigned decimal format */
H.J. Ludd0130b2012-04-16 12:16:45 +0200323#if defined(LINUX_MIPSN32) || defined(X32)
324# if 0 /* unused so far */
325# define RVAL_LDECIMAL 004 /* long decimal format */
326# define RVAL_LHEX 005 /* long hex format */
327# define RVAL_LOCTAL 006 /* long octal format */
328# endif
329# define RVAL_LUDECIMAL 007 /* long unsigned decimal format */
330#endif
Zubin Mithra64aa1b12014-06-04 08:30:41 +0530331#define RVAL_FD 010 /* file descriptor */
332#define RVAL_MASK 017 /* mask for these values */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000333
Zubin Mithra64aa1b12014-06-04 08:30:41 +0530334#define RVAL_STR 020 /* Print `auxstr' field after return val */
335#define RVAL_NONE 040 /* Print nothing */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000336
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000337#define TRACE_FILE 001 /* Trace file-related syscalls. */
338#define TRACE_IPC 002 /* Trace IPC-related syscalls. */
339#define TRACE_NETWORK 004 /* Trace network-related syscalls. */
340#define TRACE_PROCESS 010 /* Trace process-related syscalls. */
341#define TRACE_SIGNAL 020 /* Trace signal-related syscalls. */
Roland McGrath2fe7b132005-07-05 03:25:35 +0000342#define TRACE_DESC 040 /* Trace file descriptor-related syscalls. */
Namhyung Kim96792962012-10-24 11:41:57 +0900343#define TRACE_MEMORY 0100 /* Trace memory mapping-related syscalls. */
344#define SYSCALL_NEVER_FAILS 0200 /* Syscall is always successful. */
Masatake YAMATO1d78d222014-04-16 15:33:11 +0900345#define STACKTRACE_INVALIDATE_CACHE 0400 /* Trigger proc/maps cache updating */
346#define STACKTRACE_CAPTURE_ON_ENTER 01000 /* Capture stacktrace on "entering" stage */
Dmitry V. Levin3b499ca2015-01-10 22:01:35 +0300347#define TRACE_INDIRECT_SUBCALL 02000 /* Syscall is an indirect socket/ipc subcall. */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000348
Dmitry V. Levin80f7db12014-12-13 21:49:01 +0000349#if defined(ARM) || defined(AARCH64) \
350 || defined(I386) || defined(X32) || defined(X86_64) \
Mike Frysingercc07f662015-02-26 02:15:33 -0500351 || defined(IA64) \
Dmitry V. Levin80f7db12014-12-13 21:49:01 +0000352 || defined(BFIN) \
353 || defined(M68K) \
354 || defined(MICROBLAZE) \
355 || defined(S390) \
356 || defined(SH) || defined(SH64) \
357 || defined(SPARC) || defined(SPARC64) \
358 /**/
359# define NEED_UID16_PARSERS 1
360#else
361# define NEED_UID16_PARSERS 0
362#endif
363
Dmitry V. Levine3a7ef52010-03-28 19:24:54 +0000364typedef enum {
365 CFLAG_NONE = 0,
366 CFLAG_ONLY_STATS,
367 CFLAG_BOTH
368} cflag_t;
Dmitry V. Levine3a7ef52010-03-28 19:24:54 +0000369extern cflag_t cflag;
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100370extern bool debug_flag;
371extern bool Tflag;
Anton Blancharda34dead2013-07-12 12:22:06 +0200372extern bool iflag;
Mark Hillse53bf232014-05-28 17:52:40 +0100373extern bool count_wallclock;
Daniel P. Berrange01997cf2013-05-13 11:30:55 +0100374extern unsigned int qflag;
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100375extern bool not_failing_only;
Dmitry V. Levin45e7b182014-08-08 23:38:26 +0000376extern unsigned int show_fd_path;
Denys Vlasenko2a3d2752013-05-14 16:07:46 +0200377extern bool hide_log_until_execve;
Denys Vlasenko38cfe7c2013-03-05 16:01:53 +0100378/* are we filtering traces based on paths? */
379extern const char **paths_selected;
380#define tracing_paths (paths_selected != NULL)
Denys Vlasenkoeec8d5d2013-02-14 03:29:48 +0100381extern unsigned xflag;
382extern unsigned followfork;
Luca Clementi327064b2013-07-23 00:11:35 -0700383#ifdef USE_LIBUNWIND
384/* if this is true do the stack trace for every system call */
385extern bool stack_trace_enabled;
386#endif
Denys Vlasenkoeec8d5d2013-02-14 03:29:48 +0100387extern unsigned ptrace_setoptions;
388extern unsigned max_strlen;
389extern unsigned os_release;
390#undef KERNEL_VERSION
391#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100392
Dmitry V. Levina7945a32006-12-13 17:10:11 +0000393enum bitness_t { BITNESS_CURRENT = 0, BITNESS_32 };
394
Denys Vlasenko75422762011-05-27 14:36:01 +0200395void error_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
396void perror_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
397void error_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2)));
398void perror_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2)));
Denys Vlasenko1d46ba52011-08-31 14:00:02 +0200399void die_out_of_memory(void) __attribute__ ((noreturn));
Denys Vlasenko75422762011-05-27 14:36:01 +0200400
Denys Vlasenko76da8312013-07-16 12:18:59 +0200401#if USE_CUSTOM_PRINTF
Denys Vlasenko6e4f3c12012-04-16 18:22:19 +0200402/*
Denys Vlasenko6e4f3c12012-04-16 18:22:19 +0200403 * See comment in vsprintf.c for allowed formats.
404 * Short version: %h[h]u, %zu, %tu are not allowed, use %[l[l]]u.
Denys Vlasenko6e4f3c12012-04-16 18:22:19 +0200405 */
406int strace_vfprintf(FILE *fp, const char *fmt, va_list args);
407#else
408# define strace_vfprintf vfprintf
409#endif
410
Dmitry V. Levin30145dd2010-09-06 22:08:24 +0000411extern void set_sortby(const char *);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100412extern void set_overhead(int);
Dmitry V. Levin30145dd2010-09-06 22:08:24 +0000413extern void qualify(const char *);
Denys Vlasenko5a2483b2013-07-01 12:49:14 +0200414extern void print_pc(struct tcb *);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100415extern int trace_syscall(struct tcb *);
Dmitry V. Levinac5133d2014-05-29 18:10:00 +0000416extern void count_syscall(struct tcb *, const struct timeval *);
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100417extern void call_summary(FILE *);
418
Dmitry V. Levin9a176c92015-02-13 21:56:50 +0000419extern void clear_regs(void);
Denys Vlasenkoce7d9532013-02-05 16:36:13 +0100420extern void get_regs(pid_t pid);
Dmitry V. Levin9a176c92015-02-13 21:56:50 +0000421
Dmitry V. Levin97e59962015-01-14 08:05:45 +0000422extern int umoven(struct tcb *, long, unsigned int, char *);
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100423#define umove(pid, addr, objp) \
424 umoven((pid), (addr), sizeof(*(objp)), (char *) (objp))
Dmitry V. Levin97e59962015-01-14 08:05:45 +0000425extern int umovestr(struct tcb *, long, unsigned int, char *);
Denys Vlasenko752e5a02013-06-28 14:35:47 +0200426extern int upeek(int pid, long, long *);
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100427#if defined(SPARC) || defined(SPARC64) || defined(IA64) || defined(SH)
428extern long getrval2(struct tcb *);
429#endif
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100430
Dmitry V. Levin3ed5d022014-09-10 13:46:04 +0000431extern const char *signame(const int);
Denys Vlasenko7239dbc2013-03-05 15:46:34 +0100432extern void pathtrace_select(const char *);
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100433extern int pathtrace_match(struct tcb *);
Denys Vlasenko61ad0a42013-03-06 18:24:34 +0100434extern int getfdpath(struct tcb *, int, char *, unsigned);
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100435
Dmitry V. Levin3ed5d022014-09-10 13:46:04 +0000436extern const char *xlookup(const struct xlat *, const unsigned int);
Dmitry V. Levin4176d532014-09-21 22:42:45 +0000437extern const char *xlat_search(const struct xlat *, const size_t, const unsigned int);
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100438
Dmitry V. Levinccee1692012-03-25 21:49:48 +0000439extern int string_to_uint(const char *str);
Denys Vlasenkob338f2d2013-11-09 20:40:31 +0100440extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
Dmitry V. Levinccee1692012-03-25 21:49:48 +0000441
Dmitry V. Levin513e96e2015-01-26 01:17:08 +0000442#define QUOTE_0_TERMINATED 0x01
443#define QUOTE_OMIT_LEADING_TRAILING_QUOTES 0x02
444
445extern int print_quoted_string(const char *, unsigned int, unsigned int);
446
Denys Vlasenkoc9d0fc02013-02-17 22:41:33 +0100447/* a refers to the lower numbered u_arg,
448 * b refers to the higher numbered u_arg
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100449 */
Denys Vlasenkoc9d0fc02013-02-17 22:41:33 +0100450#if HAVE_LITTLE_ENDIAN_LONG_LONG
451# define LONG_LONG(a,b) \
452 ((long long)((unsigned long long)(unsigned)(a) | ((unsigned long long)(b)<<32)))
453#else
454# define LONG_LONG(a,b) \
455 ((long long)((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<32)))
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100456#endif
Dmitry V. Levin1ea64732015-01-10 00:08:58 +0000457extern int getllval(struct tcb *, unsigned long long *, int);
Dmitry V. Levinf523f102015-02-17 22:47:25 +0000458extern int printllval(struct tcb *, const char *, int)
459 __attribute__ ((format (printf, 2, 0)));
Denys Vlasenkoc9d0fc02013-02-17 22:41:33 +0100460
Dmitry V. Levin3ed5d022014-09-10 13:46:04 +0000461extern void printxval(const struct xlat *, const unsigned int, const char *);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100462extern int printargs(struct tcb *);
Denys Vlasenko72879c62012-02-27 14:18:02 +0100463extern int printargs_lu(struct tcb *);
464extern int printargs_ld(struct tcb *);
Denys Vlasenko4924dbd2011-08-19 18:06:46 +0200465extern void addflags(const struct xlat *, int);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100466extern int printflags(const struct xlat *, int, const char *);
467extern const char *sprintflags(const char *, const struct xlat *, int);
Dmitry V. Levin9514ac72014-12-06 03:53:16 +0000468extern const char *sprintmode(int);
Dmitry V. Levinb1a01b82014-12-06 03:53:16 +0000469extern const char *sprinttime(time_t);
Masatake YAMATO02f9f6b2014-10-15 22:11:43 +0900470extern void dumpiov_in_msghdr(struct tcb *, long);
Masatake YAMATOa807dce2014-11-07 01:23:26 +0900471extern void dumpiov_in_mmsghdr(struct tcb *, long);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100472extern void dumpiov(struct tcb *, int, long);
473extern void dumpstr(struct tcb *, long, int);
Denys Vlasenkob5d43b82012-04-28 14:58:35 +0200474extern void printstr(struct tcb *, long, long);
Dmitry V. Levinf523f102015-02-17 22:47:25 +0000475extern void printnum_int(struct tcb *, long, const char *)
476 __attribute__ ((format (printf, 3, 0)));
477extern void printnum_long(struct tcb *, long, const char *)
478 __attribute__ ((format (printf, 3, 0)));
Andreas Schwabe5355de2009-10-27 16:56:43 +0100479extern void printpath(struct tcb *, long);
Dmitry V. Levin3ed5d022014-09-10 13:46:04 +0000480extern void printpathn(struct tcb *, long, unsigned int);
Denys Vlasenkoa1d541e2012-01-20 11:04:04 +0100481#define TIMESPEC_TEXT_BUFSIZE (sizeof(long)*3 * 2 + sizeof("{%u, %u}"))
482#define TIMEVAL_TEXT_BUFSIZE TIMESPEC_TEXT_BUFSIZE
Andreas Schwabe5355de2009-10-27 16:56:43 +0100483extern void printtv_bitness(struct tcb *, long, enum bitness_t, int);
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100484#define printtv(tcp, addr) \
485 printtv_bitness((tcp), (addr), BITNESS_CURRENT, 0)
486#define printtv_special(tcp, addr) \
487 printtv_bitness((tcp), (addr), BITNESS_CURRENT, 1)
Denys Vlasenkoa1d541e2012-01-20 11:04:04 +0100488extern char *sprinttv(char *, struct tcb *, long, enum bitness_t, int special);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100489extern void print_timespec(struct tcb *, long);
490extern void sprint_timespec(char *, struct tcb *, long);
Dmitry V. Levind8890b52015-02-07 15:47:24 +0000491extern void printsiginfo(const siginfo_t *, int);
Denys Vlasenkod4d3ede2013-02-13 16:31:32 +0100492extern void printsiginfo_at(struct tcb *tcp, long addr);
Dmitry V. Levin31382132011-03-04 05:08:02 +0300493extern void printfd(struct tcb *, int);
Masatake YAMATOf605e922014-12-10 12:55:06 +0900494extern bool print_sockaddr_by_inode(const unsigned long, const char *);
Dmitry V. Levin99db95d2014-02-05 04:13:18 +0000495extern void print_dirfd(struct tcb *, int);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100496extern void printsock(struct tcb *, long, int);
497extern void print_sock_optmgmt(struct tcb *, long, int);
498extern void printrusage(struct tcb *, long);
Sergei Trofimovich02a08fb2011-08-11 18:04:53 +0300499#ifdef ALPHA
500extern void printrusage32(struct tcb *, long);
501#endif
Dmitry V. Levin1da7c952014-12-13 18:24:13 +0000502extern void printuid(const char *, const unsigned int);
Denys Vlasenko5e133aa2013-07-18 17:02:21 +0200503extern void print_sigset_addr_len(struct tcb *, long, long);
Dmitry V. Levin74219ea2015-03-06 01:47:18 +0000504extern const char *sprintsigmask_n(const char *, const void *, unsigned int);
505#define tprintsigmask_addr(prefix, mask) \
506 tprints(sprintsigmask_n((prefix), (mask), sizeof(mask)))
Andreas Schwabe5355de2009-10-27 16:56:43 +0100507extern void printsignal(int);
Dmitry V. Levin88849682011-06-13 22:58:44 +0000508extern void tprint_iov(struct tcb *, unsigned long, unsigned long, int decode_iov);
Denys Vlasenkoe0bc2222012-04-28 14:26:18 +0200509extern void tprint_iov_upto(struct tcb *, unsigned long, unsigned long, int decode_iov, unsigned long);
Elliott Hughes22e34b92014-09-23 19:09:50 -0700510extern void tprint_open_modes(int);
511extern const char *sprint_open_modes(int);
Mike Frysinger0cbed352012-04-04 22:22:01 -0400512extern void print_loff_t(struct tcb *, long);
Dmitry V. Levin2af69032015-02-04 23:50:50 +0000513extern void print_seccomp_filter(struct tcb *tcp, unsigned long);
Grant Edwards8a082772011-04-07 20:25:40 +0000514
Dmitry V. Levinc7afb482015-01-19 18:44:21 +0000515extern const struct_ioctlent *ioctl_lookup(const unsigned int);
Denys Vlasenkoa9fe13c2013-02-22 13:26:10 +0100516extern const struct_ioctlent *ioctl_next_match(const struct_ioctlent *);
Dmitry V. Levin924996a2015-01-20 00:24:36 +0000517extern void ioctl_print_code(const unsigned int);
Dmitry V. Levinc7afb482015-01-19 18:44:21 +0000518extern int ioctl_decode(struct tcb *, const unsigned int, long);
Gabriel Laskar6f9a01c2015-01-21 23:35:27 +0100519extern int ioctl_decode_command_number(const unsigned int);
Dmitry V. Levinc7afb482015-01-19 18:44:21 +0000520extern int block_ioctl(struct tcb *, const unsigned int, long);
Etienne Gemsa4f750b92015-02-20 17:14:10 +0100521extern int evdev_ioctl(struct tcb *, const unsigned int, long);
Dmitry V. Levinc7afb482015-01-19 18:44:21 +0000522extern int loop_ioctl(struct tcb *, const unsigned int, long);
523extern int mtd_ioctl(struct tcb *, const unsigned int, long);
524extern int ptp_ioctl(struct tcb *, const unsigned int, long);
525extern int rtc_ioctl(struct tcb *, const unsigned int, long);
526extern int scsi_ioctl(struct tcb *, const unsigned int, long);
527extern int sock_ioctl(struct tcb *, const unsigned int, long);
528extern int term_ioctl(struct tcb *, const unsigned int, long);
529extern int ubi_ioctl(struct tcb *, const unsigned int, long);
530extern int v4l2_ioctl(struct tcb *, const unsigned int, long);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000531
Dmitry V. Levin447db452014-05-29 17:59:01 +0000532extern int tv_nz(const struct timeval *);
533extern int tv_cmp(const struct timeval *, const struct timeval *);
534extern double tv_float(const struct timeval *);
535extern void tv_add(struct timeval *, const struct timeval *, const struct timeval *);
536extern void tv_sub(struct timeval *, const struct timeval *, const struct timeval *);
537extern void tv_mul(struct timeval *, const struct timeval *, int);
538extern void tv_div(struct timeval *, const struct timeval *, int);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000539
Luca Clementi327064b2013-07-23 00:11:35 -0700540#ifdef USE_LIBUNWIND
Masatake YAMATO61413922014-04-16 15:33:02 +0900541extern void unwind_init(void);
542extern void unwind_tcb_init(struct tcb *tcp);
543extern void unwind_tcb_fin(struct tcb *tcp);
544extern void unwind_cache_invalidate(struct tcb* tcp);
545extern void unwind_print_stacktrace(struct tcb* tcp);
Masatake YAMATOf8e39d72014-04-16 15:33:06 +0900546extern void unwind_capture_stacktrace(struct tcb* tcp);
Luca Clementi327064b2013-07-23 00:11:35 -0700547#endif
548
Denys Vlasenko7de265d2012-03-13 11:44:31 +0100549/* Strace log generation machinery.
550 *
551 * printing_tcp: tcb which has incomplete line being printed right now.
552 * NULL if last line has been completed ('\n'-terminated).
553 * printleader(tcp) examines it, finishes incomplete line if needed,
554 * the sets it to tcp.
555 * line_ended() clears printing_tcp and resets ->curcol = 0.
556 * tcp->curcol == 0 check is also used to detect completeness
557 * of last line, since in -ff mode just checking printing_tcp for NULL
558 * is not enough.
559 *
560 * If you change this code, test log generation in both -f and -ff modes
561 * using:
562 * strace -oLOG -f[f] test/threaded_execve
563 * strace -oLOG -f[f] test/sigkill_rain
564 * strace -oLOG -f[f] -p "`pidof web_browser`"
565 */
566extern struct tcb *printing_tcp;
567extern void printleader(struct tcb *);
568extern void line_ended(void);
569extern void tabto(void);
570extern void tprintf(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
571extern void tprints(const char *str);
572
Denys Vlasenko9fd4f962012-03-19 09:36:42 +0100573#if SUPPORTED_PERSONALITIES > 1
574extern void set_personality(int personality);
Denys Vlasenkoae8643e2013-02-15 14:55:14 +0100575extern unsigned current_personality;
Denys Vlasenko9fd4f962012-03-19 09:36:42 +0100576#else
577# define set_personality(personality) ((void)0)
578# define current_personality 0
Denys Vlasenkoae8643e2013-02-15 14:55:14 +0100579#endif
580
581#if SUPPORTED_PERSONALITIES == 1
582# define current_wordsize PERSONALITY0_WORDSIZE
583#else
584# if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE
585# define current_wordsize PERSONALITY0_WORDSIZE
586# else
587extern unsigned current_wordsize;
588# endif
Denys Vlasenko9fd4f962012-03-19 09:36:42 +0100589#endif
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000590
Denys Vlasenkoe015d2d2013-02-15 14:58:52 +0100591/* In many, many places we play fast and loose and use
592 * tprintf("%d", (int) tcp->u_arg[N]) to print fds, pids etc.
593 * We probably need to use widen_to_long() instead:
594 */
595#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
596# define widen_to_long(v) (current_wordsize == 4 ? (long)(int32_t)(v) : (long)(v))
597#else
598# define widen_to_long(v) ((long)(v))
599#endif
600
Denys Vlasenko9cbc15b2013-02-22 13:37:36 +0100601extern const struct_sysent sysent0[];
602extern const char *const errnoent0[];
603extern const char *const signalent0[];
604extern const struct_ioctlent ioctlent0[];
605extern qualbits_t *qual_vec[SUPPORTED_PERSONALITIES];
606#define qual_flags (qual_vec[current_personality])
607#if SUPPORTED_PERSONALITIES > 1
Denys Vlasenkoa9fe13c2013-02-22 13:26:10 +0100608extern const struct_sysent *sysent;
Denys Vlasenko39fca622011-08-20 02:12:33 +0200609extern const char *const *errnoent;
Roland McGrathee36ce12004-09-04 03:53:10 +0000610extern const char *const *signalent;
Denys Vlasenko9cbc15b2013-02-22 13:37:36 +0100611extern const struct_ioctlent *ioctlent;
612#else
613# define sysent sysent0
614# define errnoent errnoent0
615# define signalent signalent0
616# define ioctlent ioctlent0
617#endif
618extern unsigned nsyscalls;
619extern unsigned nerrnos;
Denys Vlasenkoafc64032011-08-23 13:29:01 +0200620extern unsigned nsignals;
Denys Vlasenko9cbc15b2013-02-22 13:37:36 +0100621extern unsigned nioctlents;
622extern unsigned num_quals;
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000623
Denys Vlasenkoc956ef02013-02-16 14:25:56 +0100624/*
625 * If you need non-NULL sysent[scno].sys_func and sysent[scno].sys_name
626 */
Denys Vlasenko5721cdb2013-02-16 13:22:38 +0100627#define SCNO_IS_VALID(scno) \
Denys Vlasenkoc956ef02013-02-16 14:25:56 +0100628 ((unsigned long)(scno) < nsyscalls && sysent[scno].sys_func)
629
630/* Only ensures that sysent[scno] isn't out of range */
631#define SCNO_IN_RANGE(scno) \
632 ((unsigned long)(scno) < nsyscalls)