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>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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.
42 #ifdef _LARGEFILE64_SOURCE
43 /* This is the macro everything checks before using foo64 names. */
44 # ifndef _LFS64_LARGEFILE
45 # define _LFS64_LARGEFILE 1
49 /* Configuration section */
52 # define MAX_QUALS 7000 /* maximum number of syscalls, signals, etc. */
54 # define MAX_QUALS 2048 /* maximum number of syscalls, signals, etc. */
57 #ifndef DEFAULT_STRLEN
58 /* default maximum # of bytes printed in `printstr', change with -s switch */
59 # define DEFAULT_STRLEN 32
61 #ifndef DEFAULT_ACOLUMN
62 # define DEFAULT_ACOLUMN 40 /* default alignment column for results */
65 /* Maximum number of args to a syscall.
67 * Make sure that all entries in all syscallent.h files
68 * have nargs <= MAX_ARGS!
69 * linux/<ARCH>/syscallent.h: all have nargs <= 6.
75 #ifndef DEFAULT_SORTBY
76 # define DEFAULT_SORTBY "time" /* default sorting method for call profiling */
79 #include <sys/types.h>
95 #endif /* STDC_HEADERS */
101 #if defined(SPARC) || defined(SPARC64)
104 #if defined(MIPS) && _MIPS_SIM == _MIPS_SIM_ABI32
105 # define LINUX_MIPSO32
107 #if defined(MIPS) && _MIPS_SIM == _MIPS_SIM_NABI32
108 # define LINUX_MIPSN32
109 # define LINUX_MIPS64
111 #if defined(MIPS) && _MIPS_SIM == _MIPS_SIM_ABI64
112 # define LINUX_MIPSN64
113 # define LINUX_MIPS64
116 #if (defined(LINUXSPARC) || defined(X86_64) || defined(ARM) || defined(AVR32)) && defined(__GLIBC__)
117 # include <sys/ptrace.h>
119 /* Work around awkward prototype in ptrace.h. */
120 # define ptrace xptrace
121 # include <sys/ptrace.h>
125 # include <asm/ptrace.h>
128 extern long ptrace(int, int, char *, long);
131 #if !defined(__GLIBC__)
132 # define PTRACE_PEEKUSER PTRACE_PEEKUSR
133 # define PTRACE_POKEUSER PTRACE_POKEUSR
135 #if defined(X86_64) || defined(I386)
136 /* For struct pt_regs. x86 strace uses PTRACE_GETREGS.
137 * PTRACE_GETREGS returns registers in the layout of this struct.
139 # include <asm/ptrace.h>
156 # define PT_GR20 (20*4)
157 # define PT_GR26 (26*4)
158 # define PT_GR28 (28*4)
159 # define PT_IAOQ0 (106*4)
160 # define PT_IAOQ1 (107*4)
163 /* SH64 Linux - this code assumes the following kernel API for system calls:
165 System Call Offset 16 (actually, (syscall no.) | (0x1n << 16),
166 where n = no. of parameters.
167 Other regs Offset 24+
169 On entry: R2-7 = parameters 1-6 (as many as necessary)
170 On return: R9 = result. */
172 /* Offset for peeks of registers */
173 # define REG_OFFSET (24)
174 # define REG_GENERAL(x) (8*(x)+REG_OFFSET)
175 # define REG_PC (0*8)
176 # define REG_SYSCALL (2*8)
179 #define SUPPORTED_PERSONALITIES 1
180 #define DEFAULT_PERSONALITY 0
183 /* Indexes into the pt_regs.u_reg[] array -- UREG_XX from kernel are all off
184 * by 1 and use Ix instead of Ox. These work for both 32 and 64 bit Linux. */
188 # define PERSONALITY0_WORDSIZE 4
189 # define PERSONALITY1_WORDSIZE 4
190 # undef SUPPORTED_PERSONALITIES
191 # if defined(SPARC64)
192 # include <asm/psrcompat.h>
193 # define SUPPORTED_PERSONALITIES 3
194 # define PERSONALITY2_WORDSIZE 8
196 # include <asm/psr.h>
197 # define SUPPORTED_PERSONALITIES 2
198 # endif /* SPARC64 */
199 #endif /* LINUXSPARC */
202 # undef SUPPORTED_PERSONALITIES
203 # define SUPPORTED_PERSONALITIES 2
204 # define PERSONALITY0_WORDSIZE 8
205 # define PERSONALITY1_WORDSIZE 4
209 # undef SUPPORTED_PERSONALITIES
210 # define SUPPORTED_PERSONALITIES 2
211 # define PERSONALITY0_WORDSIZE 4
212 # define PERSONALITY1_WORDSIZE 4
216 # undef SUPPORTED_PERSONALITIES
217 # define SUPPORTED_PERSONALITIES 2
218 # define PERSONALITY0_WORDSIZE 8
219 # define PERSONALITY1_WORDSIZE 4
223 #if !HAVE_DECL_PTRACE_SETOPTIONS
224 # define PTRACE_SETOPTIONS 0x4200
226 #if !HAVE_DECL_PTRACE_GETEVENTMSG
227 # define PTRACE_GETEVENTMSG 0x4201
229 #if !HAVE_DECL_PTRACE_GETSIGINFO
230 # define PTRACE_GETSIGINFO 0x4202
233 #if !HAVE_DECL_PTRACE_O_TRACESYSGOOD
234 # define PTRACE_O_TRACESYSGOOD 0x00000001
236 #if !HAVE_DECL_PTRACE_O_TRACEFORK
237 # define PTRACE_O_TRACEFORK 0x00000002
239 #if !HAVE_DECL_PTRACE_O_TRACEVFORK
240 # define PTRACE_O_TRACEVFORK 0x00000004
242 #if !HAVE_DECL_PTRACE_O_TRACECLONE
243 # define PTRACE_O_TRACECLONE 0x00000008
245 #if !HAVE_DECL_PTRACE_O_TRACEEXEC
246 # define PTRACE_O_TRACEEXEC 0x00000010
248 #if !HAVE_DECL_PTRACE_O_TRACEEXIT
249 # define PTRACE_O_TRACEEXIT 0x00000040
252 #if !HAVE_DECL_PTRACE_EVENT_FORK
253 # define PTRACE_EVENT_FORK 1
255 #if !HAVE_DECL_PTRACE_EVENT_VFORK
256 # define PTRACE_EVENT_VFORK 2
258 #if !HAVE_DECL_PTRACE_EVENT_CLONE
259 # define PTRACE_EVENT_CLONE 3
261 #if !HAVE_DECL_PTRACE_EVENT_EXEC
262 # define PTRACE_EVENT_EXEC 4
264 #if !HAVE_DECL_PTRACE_EVENT_VFORK_DONE
265 # define PTRACE_EVENT_VFORK_DONE 5
267 #if !HAVE_DECL_PTRACE_EVENT_EXIT
268 # define PTRACE_EVENT_EXIT 6
271 /* Experimental code using PTRACE_SEIZE can be enabled here: */
272 //# define USE_SEIZE 1
276 # define PTRACE_SEIZE 0x4206
277 # undef PTRACE_INTERRUPT
278 # define PTRACE_INTERRUPT 0x4207
279 # undef PTRACE_LISTEN
280 # define PTRACE_LISTEN 0x4208
281 # undef PTRACE_SEIZE_DEVEL
282 # define PTRACE_SEIZE_DEVEL 0x80000000
283 # undef PTRACE_EVENT_STOP
284 # define PTRACE_EVENT_STOP 7
285 # define PTRACE_EVENT_STOP1 128
289 #if !defined __GNUC__
290 # define __attribute__(x) /*nothing*/
293 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
296 extern struct pt_regs i386_regs;
299 /* Trace Control Block */
301 int flags; /* See below for TCB_ values */
302 int pid; /* Process Id of this entry */
303 int u_nargs; /* System call argument count */
304 int u_error; /* Error code */
305 long scno; /* System call number */
306 long u_arg[MAX_ARGS]; /* System call arguments */
307 #if defined(LINUX_MIPSN32)
308 long long ext_arg[MAX_ARGS]; /* System call arguments */
310 long u_rval; /* (first) return value */
311 #ifdef HAVE_LONG_LONG
312 long long u_lrval; /* long long return value */
315 #if SUPPORTED_PERSONALITIES > 1
316 int currpers; /* Personality at the time of scno update */
318 int curcol; /* Output column for this process */
319 FILE *outf; /* Output file for this process */
320 const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
321 struct timeval stime; /* System time usage as of last process wait */
322 struct timeval dtime; /* Delta for system time usage */
323 struct timeval etime; /* Syscall entry time */
324 /* Support for tracing forked processes */
325 long baddr; /* `Breakpoint' address */
326 long inst[2]; /* Instructions on above */
330 #define TCB_INUSE 00001 /* This table entry is in use */
331 /* We have attached to this process, but did not see it stopping yet.
332 * (If this bit is not set, we either didn't attach yet,
333 * or we did attach to it, already saw it stopping at least once,
334 * did some init work on it and cleared this bit. TODO: maybe it makes sense
335 * to split these two states?)
337 #define TCB_STARTUP 00002
338 #define TCB_IGNORE_ONE_SIGSTOP 00004 /* Next SIGSTOP is to be ignored */
340 * Are we in system call entry or in syscall exit?
342 * This bit is set after all syscall entry processing is done.
343 * Therefore, this bit will be set when next ptrace stop occurs,
344 * which should be syscall exit stop. Other stops which are possible
345 * directly after syscall entry (death, ptrace event stop)
346 * are simpler and handled without calling trace_syscall(), therefore
347 * the places where TCB_INSYSCALL can be set but we aren't in syscall stop
348 * are limited to trace(), this condition is never observed in trace_syscall()
350 * The bit is cleared after all syscall exit processing is done.
351 * User-generated SIGTRAPs and post-execve SIGTRAP make it necessary
352 * to be very careful and NOT set TCB_INSYSCALL bit when they are encountered.
353 * TCB_WAITEXECVE bit is used for this purpose (see below).
355 * Use entering(tcp) / exiting(tcp) to check this bit to make code more readable.
357 #define TCB_INSYSCALL 00010
358 #define TCB_ATTACHED 00020 /* Process is not our own child */
359 #define TCB_BPTSET 00100 /* "Breakpoint" set after fork(2) */
360 #define TCB_REPRINT 01000 /* We should reprint this syscall on exit */
361 #define TCB_FILTERED 02000 /* This system call has been filtered out */
362 /* x86 does not need TCB_WAITEXECVE.
363 * It can detect SIGTRAP by looking at eax/rax.
364 * See "not a syscall entry (eax = %ld)\n" message
365 * in syscall_fixup_on_sysenter().
367 #if defined(ALPHA) || defined(AVR32) || defined(SPARC) || defined(SPARC64) \
368 || defined(POWERPC) || defined(IA64) || defined(HPPA) \
369 || defined(SH) || defined(SH64) || defined(S390) || defined(S390X) \
370 || defined(ARM) || defined(MIPS) || defined(BFIN) || defined(TILE)
371 /* This tracee has entered into execve syscall. Expect post-execve SIGTRAP
372 * to happen. (When it is detected, tracee is continued and this bit is cleared.)
374 # define TCB_WAITEXECVE 04000
376 #include <sys/syscall.h>
378 /* qualifier flags */
379 #define QUAL_TRACE 0001 /* this system call should be traced */
380 #define QUAL_ABBREV 0002 /* abbreviate the structures of this syscall */
381 #define QUAL_VERBOSE 0004 /* decode the structures of this syscall */
382 #define QUAL_RAW 0010 /* print all args in hex for this syscall */
383 #define QUAL_SIGNAL 0020 /* report events with this signal */
384 #define QUAL_FAULT 0040 /* report events with this fault */
385 #define QUAL_READ 0100 /* dump data read on this file descriptor */
386 #define QUAL_WRITE 0200 /* dump data written to this file descriptor */
388 #define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL))
389 #define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL)
390 #define syserror(tcp) ((tcp)->u_error != 0)
391 #define verbose(tcp) (qual_flags[(tcp)->scno] & QUAL_VERBOSE)
392 #define abbrev(tcp) (qual_flags[(tcp)->scno] & QUAL_ABBREV)
393 #define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
400 extern const struct xlat open_mode_flags[];
401 extern const struct xlat addrfams[];
402 extern const struct xlat struct_user_offsets[];
403 extern const struct xlat open_access_modes[];
405 /* Format of syscall return values */
406 #define RVAL_DECIMAL 000 /* decimal format */
407 #define RVAL_HEX 001 /* hex format */
408 #define RVAL_OCTAL 002 /* octal format */
409 #define RVAL_UDECIMAL 003 /* unsigned decimal format */
410 #define RVAL_LDECIMAL 004 /* long decimal format */
411 #define RVAL_LHEX 005 /* long hex format */
412 #define RVAL_LOCTAL 006 /* long octal format */
413 #define RVAL_LUDECIMAL 007 /* long unsigned decimal format */
414 #define RVAL_MASK 007 /* mask for these values */
416 #define RVAL_STR 010 /* Print `auxstr' field after return val */
417 #define RVAL_NONE 020 /* Print nothing */
420 # define offsetof(type, member) (((char *) &(((type *) NULL)->member)) - \
421 ((char *) (type *) NULL))
424 /* get offset of member within a user struct */
425 #define uoff(member) offsetof(struct user, member)
427 #define TRACE_FILE 001 /* Trace file-related syscalls. */
428 #define TRACE_IPC 002 /* Trace IPC-related syscalls. */
429 #define TRACE_NETWORK 004 /* Trace network-related syscalls. */
430 #define TRACE_PROCESS 010 /* Trace process-related syscalls. */
431 #define TRACE_SIGNAL 020 /* Trace signal-related syscalls. */
432 #define TRACE_DESC 040 /* Trace file descriptor-related syscalls. */
433 #define SYSCALL_NEVER_FAILS 0100 /* Syscall is always successful. */
441 extern int *qual_flags;
442 extern int debug, followfork;
443 extern unsigned int ptrace_setoptions;
444 extern int dtime, xflag, qflag;
445 extern cflag_t cflag;
446 extern int max_strlen;
448 * Which tcb has incomplete line being printed right now?
449 * NULL if last line has been completed ('\n'-terminated).
450 * printleader(tcp) sets it. Clearing is open-coded.
452 extern struct tcb *printing_tcp;
454 enum bitness_t { BITNESS_CURRENT = 0, BITNESS_32 };
456 void error_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
457 void perror_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
458 void error_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2)));
459 void perror_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2)));
460 void die_out_of_memory(void) __attribute__ ((noreturn));
462 extern void set_personality(int personality);
463 extern const char *xlookup(const struct xlat *, int);
464 extern struct tcb *alloc_tcb(int, int);
465 extern void droptcb(struct tcb *);
467 #define alloctcb(pid) alloc_tcb((pid), 1)
469 extern void set_sortby(const char *);
470 extern void set_overhead(int);
471 extern void qualify(const char *);
472 extern long do_ptrace(int request, struct tcb *tcp, void *addr, void *data);
473 extern int ptrace_restart(int request, struct tcb *tcp, int sig);
474 extern int trace_syscall(struct tcb *);
475 extern void count_syscall(struct tcb *, struct timeval *);
476 extern void printxval(const struct xlat *, int, const char *);
477 extern int printargs(struct tcb *);
478 extern void addflags(const struct xlat *, int);
479 extern int printflags(const struct xlat *, int, const char *);
480 extern const char *sprintflags(const char *, const struct xlat *, int);
481 extern int umoven(struct tcb *, long, int, char *);
482 extern int umovestr(struct tcb *, long, int, char *);
483 extern int upeek(struct tcb *, long, long *);
484 extern void dumpiov(struct tcb *, int, long);
485 extern void dumpstr(struct tcb *, long, int);
486 extern void printstr(struct tcb *, long, int);
487 extern void printnum(struct tcb *, long, const char *);
488 extern void printnum_int(struct tcb *, long, const char *);
489 extern void printpath(struct tcb *, long);
490 extern void printpathn(struct tcb *, long, int);
491 #define TIMESPEC_TEXT_BUFSIZE (sizeof(long)*3 * 2 + sizeof("{%u, %u}"))
492 #define TIMEVAL_TEXT_BUFSIZE TIMESPEC_TEXT_BUFSIZE
493 extern void printtv_bitness(struct tcb *, long, enum bitness_t, int);
494 extern char *sprinttv(char *, struct tcb *, long, enum bitness_t, int special);
495 extern void print_timespec(struct tcb *, long);
496 extern void sprint_timespec(char *, struct tcb *, long);
497 #ifdef HAVE_SIGINFO_T
498 extern void printsiginfo(siginfo_t *, int);
500 extern const char *getfdpath(struct tcb *, int);
501 extern void printfd(struct tcb *, int);
502 extern void printsock(struct tcb *, long, int);
503 extern void print_sock_optmgmt(struct tcb *, long, int);
504 extern void printrusage(struct tcb *, long);
506 extern void printrusage32(struct tcb *, long);
508 extern void printuid(const char *, unsigned long);
509 extern int clearbpt(struct tcb *);
511 * On Linux, "setbpt" is a misnomer: we don't set a breakpoint
512 * (IOW: no poking in user's text segment),
513 * instead we change fork/vfork/clone into clone(CLONE_PTRACE).
514 * On newer kernels, we use PTRACE_O_TRACECLONE/TRACE[V]FORK instead.
516 extern int setbpt(struct tcb *);
517 extern void printcall(struct tcb *);
518 extern const char *signame(int);
519 extern void print_sigset(struct tcb *, long, int);
520 extern void printsignal(int);
521 extern void printleader(struct tcb *);
522 extern void tabto(void);
523 extern void call_summary(FILE *);
524 extern void tprint_iov(struct tcb *, unsigned long, unsigned long, int decode_iov);
525 extern void tprint_open_modes(mode_t);
526 extern const char *sprint_open_modes(mode_t);
527 extern int is_restart_error(struct tcb *);
529 extern int pathtrace_select(const char *);
530 extern int pathtrace_match(struct tcb *);
532 extern int change_syscall(struct tcb *, int);
533 extern int internal_fork(struct tcb *);
534 extern int internal_exec(struct tcb *);
536 extern const struct ioctlent *ioctl_lookup(long);
537 extern const struct ioctlent *ioctl_next_match(const struct ioctlent *);
538 extern int ioctl_decode(struct tcb *, long, long);
539 extern int term_ioctl(struct tcb *, long, long);
540 extern int sock_ioctl(struct tcb *, long, long);
541 extern int proc_ioctl(struct tcb *, int, int);
542 extern int stream_ioctl(struct tcb *, int, int);
543 extern int rtc_ioctl(struct tcb *, long, long);
544 extern int scsi_ioctl(struct tcb *, long, long);
545 extern int block_ioctl(struct tcb *, long, long);
547 extern int tv_nz(struct timeval *);
548 extern int tv_cmp(struct timeval *, struct timeval *);
549 extern double tv_float(struct timeval *);
550 extern void tv_add(struct timeval *, struct timeval *, struct timeval *);
551 extern void tv_sub(struct timeval *, struct timeval *, struct timeval *);
552 extern void tv_mul(struct timeval *, struct timeval *, int);
553 extern void tv_div(struct timeval *, struct timeval *, int);
555 #if !defined HAVE_STPCPY
556 /* Some libc have stpcpy, some don't. Sigh...
557 * Roll our private implementation...
560 #define stpcpy strace_stpcpy
561 extern char *stpcpy(char *dst, const char *src);
564 #if defined(SPARC) || defined(SPARC64) || defined(IA64) || defined(SH)
565 extern long getrval2(struct tcb *);
568 #define umove(pid, addr, objp) \
569 umoven((pid), (addr), sizeof *(objp), (char *) (objp))
571 #define printtv(tcp, addr) \
572 printtv_bitness((tcp), (addr), BITNESS_CURRENT, 0)
573 #define printtv_special(tcp, addr) \
574 printtv_bitness((tcp), (addr), BITNESS_CURRENT, 1)
576 extern void tprintf(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
577 extern void tprints(const char *str);
579 #ifndef HAVE_STRERROR
580 const char *strerror(int);
582 #ifndef HAVE_STRSIGNAL
583 const char *strsignal(int);
586 extern int current_personality;
587 extern const int personality_wordsize[];
593 const char *sys_name;
602 extern const struct sysent *sysent;
603 extern unsigned nsyscalls;
604 extern const char *const *errnoent;
605 extern unsigned nerrnos;
606 extern const struct ioctlent *ioctlent;
607 extern unsigned nioctlents;
608 extern const char *const *signalent;
609 extern unsigned nsignals;
611 #define SCNO_IN_RANGE(scno) \
612 ((unsigned long)(scno) < nsyscalls && sysent[scno].sys_func)
616 /* _l refers to the lower numbered u_arg,
617 * _h refers to the higher numbered u_arg
620 #if HAVE_LITTLE_ENDIAN_LONG_LONG
621 #define LONG_LONG(_l,_h) \
622 ((long long)((unsigned long long)(unsigned)(_l) | ((unsigned long long)(_h)<<32)))
624 #define LONG_LONG(_l,_h) \
625 ((long long)((unsigned long long)(unsigned)(_h) | ((unsigned long long)(_l)<<32)))
628 extern int printllval(struct tcb *, const char *, int);
635 extern int not_failing_only;
636 extern int show_fd_path;
637 extern int tracing_paths;