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) 2001-2018 The strace developers.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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.
42 #include <sys/types.h>
47 /* Open-coding isprint(ch) et al proved more efficient than calling
48 * generalized libc interface. We don't *want* to do non-ASCII anyway.
50 /* #include <ctype.h> */
56 #include "arch_defs.h"
57 #include "error_prints.h"
58 #include "gcc_compat.h"
59 #include "kernel_types.h"
61 #include "mpers_type.h"
62 #include "string_to_uint.h"
67 const char *strerror(int);
70 /* Some libc have stpcpy, some don't. Sigh...
71 * Roll our private implementation...
74 #define stpcpy strace_stpcpy
75 extern char *stpcpy(char *dst, const char *src);
78 /* Glibc has an efficient macro for sigemptyset
79 * (it just does one or two assignments of 0 to internal vector of longs).
81 #if defined(__GLIBC__) && defined(__sigemptyset) && !defined(sigemptyset)
82 # define sigemptyset __sigemptyset
85 /* Configuration section */
86 #ifndef DEFAULT_STRLEN
87 /* default maximum # of bytes printed in `printstr', change with -s switch */
88 # define DEFAULT_STRLEN 32
90 #ifndef DEFAULT_ACOLUMN
91 # define DEFAULT_ACOLUMN 40 /* default alignment column for results */
94 * Maximum number of args to a syscall.
96 * Make sure that all entries in all syscallent.h files have nargs <= MAX_ARGS!
97 * linux/<ARCH>/syscallent*.h:
98 * all have nargs <= 6 except mips o32 which has nargs <= 7.
101 # ifdef LINUX_MIPSO32
107 /* default sorting method for call profiling */
108 #ifndef DEFAULT_SORTBY
109 # define DEFAULT_SORTBY "time"
112 /* To force NOMMU build, set to 1 */
113 #define NOMMU_SYSTEM 0
116 # define ERESTARTSYS 512
118 #ifndef ERESTARTNOINTR
119 # define ERESTARTNOINTR 513
121 #ifndef ERESTARTNOHAND
122 # define ERESTARTNOHAND 514
124 #ifndef ERESTART_RESTARTBLOCK
125 # define ERESTART_RESTARTBLOCK 516
128 #define PERSONALITY0_WORDSIZE SIZEOF_LONG
129 #define PERSONALITY0_KLONGSIZE SIZEOF_KERNEL_LONG_T
130 #define PERSONALITY0_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
131 #define PERSONALITY0_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
133 #if SUPPORTED_PERSONALITIES > 1
134 # define PERSONALITY1_WORDSIZE 4
135 # define PERSONALITY1_KLONGSIZE PERSONALITY1_WORDSIZE
138 #if SUPPORTED_PERSONALITIES > 2
139 # define PERSONALITY2_WORDSIZE 4
140 # define PERSONALITY2_KLONGSIZE PERSONALITY0_KLONGSIZE
143 #if SUPPORTED_PERSONALITIES > 1 && defined HAVE_M32_MPERS
144 # define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
145 # define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
146 # define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
147 # define MPERS_m32_IOCTL_MACROS "ioctl_redefs1.h"
148 # define HAVE_PERSONALITY_1_MPERS 1
150 # define PERSONALITY1_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
151 # define PERSONALITY1_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
152 # define PERSONALITY1_INCLUDE_FUNCS "empty.h"
153 # define HAVE_PERSONALITY_1_MPERS 0
156 #if SUPPORTED_PERSONALITIES > 2 && defined HAVE_MX32_MPERS
157 # define PERSONALITY2_INCLUDE_FUNCS "mx32_funcs.h"
158 # define PERSONALITY2_INCLUDE_PRINTERS_DECLS "mx32_printer_decls.h"
159 # define PERSONALITY2_INCLUDE_PRINTERS_DEFS "mx32_printer_defs.h"
160 # define MPERS_mx32_IOCTL_MACROS "ioctl_redefs2.h"
161 # define HAVE_PERSONALITY_2_MPERS 1
163 # define PERSONALITY2_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
164 # define PERSONALITY2_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
165 # define PERSONALITY2_INCLUDE_FUNCS "empty.h"
166 # define HAVE_PERSONALITY_2_MPERS 0
169 typedef struct ioctlent {
174 #define INJECT_F_SIGNAL 1
175 #define INJECT_F_RETVAL 2
176 #define INJECT_F_DELAY_ENTER 4
177 #define INJECT_F_DELAY_EXIT 8
180 uint8_t flags; /* only 2 of 8 flags are used so far */
181 uint8_t signo; /* NSIG <= 128 */
182 uint16_t delay_idx; /* index in delay_data_vec */
189 struct inject_data data;
192 #define MAX_ERRNO_VALUE 4095
194 /* Trace Control Block */
196 int flags; /* See below for TCB_ values */
197 int pid; /* If 0, this tcb is free */
198 int qual_flg; /* qual_flags[scno] or DEFAULT_QUAL_FLAGS + RAW */
199 unsigned long u_error; /* Error code */
200 kernel_ulong_t scno; /* System call number */
201 kernel_ulong_t u_arg[MAX_ARGS]; /* System call arguments */
202 kernel_long_t u_rval; /* Return value */
203 #if SUPPORTED_PERSONALITIES > 1
204 unsigned int currpers; /* Personality at the time of scno update */
206 int sys_func_rval; /* Syscall entry parser's return value */
207 int curcol; /* Output column for this process */
208 FILE *outf; /* Output file for this process */
209 const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
210 void *_priv_data; /* Private data for syscall decoding functions */
211 void (*_free_priv_data)(void *); /* Callback for freeing priv_data */
212 const struct_sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */
213 const struct_sysent *s_prev_ent; /* for "resuming interrupted SYSCALL" msg */
214 struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
215 struct timespec stime; /* System time usage as of last process wait */
216 struct timespec dtime; /* Delta for system time usage */
217 struct timespec etime; /* Syscall entry time */
218 struct timespec delay_expiration_time; /* When does the delay end */
220 struct mmap_cache_t *mmap_cache;
221 unsigned int mmap_cache_size;
222 unsigned int mmap_cache_generation;
225 struct UPT_info *libunwind_ui;
226 struct queue_t *queue;
231 /* We have attached to this process, but did not see it stopping yet */
232 #define TCB_STARTUP 0x01
233 #define TCB_IGNORE_ONE_SIGSTOP 0x02 /* Next SIGSTOP is to be ignored */
235 * Are we in system call entry or in syscall exit?
237 * This bit is set in syscall_entering_finish() and cleared in
238 * syscall_exiting_finish().
239 * Other stops which are possible directly after syscall entry (death, ptrace
240 * event stop) are handled without calling syscall_{entering,exiting}_*().
242 * Use entering(tcp) / exiting(tcp) to check this bit to make code more
245 #define TCB_INSYSCALL 0x04
246 #define TCB_ATTACHED 0x08 /* We attached to it already */
247 #define TCB_REPRINT 0x10 /* We should reprint this syscall on exit */
248 #define TCB_FILTERED 0x20 /* This system call has been filtered out */
249 #define TCB_TAMPERED 0x40 /* A syscall has been tampered with */
250 #define TCB_HIDE_LOG 0x80 /* We should hide everything (until execve) */
251 #define TCB_SKIP_DETACH_ON_FIRST_EXEC 0x100 /* -b execve should skip detach on first execve */
252 #define TCB_GRABBED 0x200 /* We grab the process and can catch it
253 * in the middle of a syscall */
254 #define TCB_RECOVERING 0x400 /* We try to recover after detecting incorrect
255 * syscall entering/exiting state */
256 #define TCB_INJECT_DELAY_EXIT 0x800 /* Current syscall needs to be delayed
258 #define TCB_DELAYED 0x1000 /* Current syscall has been delayed */
260 /* qualifier flags */
261 #define QUAL_TRACE 0x001 /* this system call should be traced */
262 #define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */
263 #define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */
264 #define QUAL_RAW 0x008 /* print all args in hex for this syscall */
265 #define QUAL_INJECT 0x010 /* tamper with this system call on purpose */
267 #define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE)
269 #define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL))
270 #define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL)
271 #define syserror(tcp) ((tcp)->u_error != 0)
272 #define traced(tcp) ((tcp)->qual_flg & QUAL_TRACE)
273 #define verbose(tcp) ((tcp)->qual_flg & QUAL_VERBOSE)
274 #define abbrev(tcp) ((tcp)->qual_flg & QUAL_ABBREV)
275 #define raw(tcp) ((tcp)->qual_flg & QUAL_RAW)
276 #define inject(tcp) ((tcp)->qual_flg & QUAL_INJECT)
277 #define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
278 #define hide_log(tcp) ((tcp)->flags & TCB_HIDE_LOG)
279 #define syscall_tampered(tcp) ((tcp)->flags & TCB_TAMPERED)
280 #define recovering(tcp) ((tcp)->flags & TCB_RECOVERING)
281 #define inject_delay_exit(tcp) ((tcp)->flags & TCB_INJECT_DELAY_EXIT)
282 #define syscall_delayed(tcp) ((tcp)->flags & TCB_DELAYED)
286 extern const struct xlat addrfams[];
287 extern const struct xlat arp_hardware_types[];
288 extern const struct xlat at_flags[];
289 extern const struct xlat clocknames[];
290 extern const struct xlat dirent_types[];
292 /** Ethernet protocols list, sorted and unterminated, defined in sockaddr.c. */
293 extern const struct xlat ethernet_protocols[];
294 /** Ethernet protocols array size without terminating record. */
295 extern const size_t ethernet_protocols_size;
297 extern const struct xlat evdev_abs[];
298 extern const struct xlat iffflags[];
299 extern const struct xlat inet_protocols[];
300 extern const struct xlat ip_type_of_services[];
301 extern const struct xlat msg_flags[];
302 extern const struct xlat netlink_protocols[];
303 extern const struct xlat nl_netfilter_msg_types[];
304 extern const struct xlat nl_route_types[];
305 extern const struct xlat open_access_modes[];
306 extern const struct xlat open_mode_flags[];
307 extern const struct xlat resource_flags[];
308 extern const struct xlat routing_scopes[];
309 extern const struct xlat routing_table_ids[];
310 extern const struct xlat routing_types[];
311 extern const struct xlat seccomp_filter_flags[];
312 extern const struct xlat seccomp_ret_action[];
313 extern const struct xlat setns_types[];
314 extern const struct xlat sg_io_info[];
315 extern const struct xlat socketlayers[];
316 extern const struct xlat socktypes[];
317 extern const struct xlat tcp_state_flags[];
318 extern const struct xlat tcp_states[];
319 extern const struct xlat whence_codes[];
321 /* Format of syscall return values */
322 #define RVAL_DECIMAL 000 /* decimal format */
323 #define RVAL_HEX 001 /* hex format */
324 #define RVAL_OCTAL 002 /* octal format */
325 #define RVAL_UDECIMAL 003 /* unsigned decimal format */
326 #define RVAL_FD 010 /* file descriptor */
327 #define RVAL_MASK 013 /* mask for these values */
329 #define RVAL_STR 020 /* Print `auxstr' field after return val */
330 #define RVAL_NONE 040 /* Print nothing */
332 #define RVAL_DECODED 0100 /* syscall decoding finished */
333 #define RVAL_IOCTL_DECODED 0200 /* ioctl sub-parser successfully decoded
335 #define RVAL_PRINT_ERR_VAL 0400 /* Print decoded error code along with
336 syscall return value. Needed for modify_ldt
337 that for some reason decides to return
338 an error with higher bits set to 0. */
340 #define IOCTL_NUMBER_UNKNOWN 0
341 #define IOCTL_NUMBER_HANDLED 1
342 #define IOCTL_NUMBER_STOP_LOOKUP 010
344 #define indirect_ipccall(tcp) (tcp->s_ent->sys_flags & TRACE_INDIRECT_SUBCALL)
355 extern enum sock_proto get_proto_by_name(const char *);
368 extern cflag_t cflag;
371 extern bool count_wallclock;
372 extern unsigned int qflag;
373 extern bool not_failing_only;
374 extern unsigned int show_fd_path;
375 /* are we filtering traces based on paths? */
376 extern struct path_set {
377 const char **paths_selected;
381 #define tracing_paths (global_path_set.num_selected != 0)
382 extern unsigned xflag;
383 extern unsigned followfork;
385 /* if this is true do the stack trace for every system call */
386 extern bool stack_trace_enabled;
388 extern unsigned ptrace_setoptions;
389 extern unsigned max_strlen;
390 extern unsigned os_release;
391 #undef KERNEL_VERSION
392 #define KERNEL_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
394 extern int read_int_from_file(struct tcb *, const char *, int *);
396 extern void set_sortby(const char *);
397 extern void set_overhead(int);
398 extern void print_pc(struct tcb *);
400 extern int syscall_entering_decode(struct tcb *);
401 extern int syscall_entering_trace(struct tcb *, unsigned int *);
402 extern void syscall_entering_finish(struct tcb *, int);
404 extern int syscall_exiting_decode(struct tcb *, struct timespec *);
405 extern int syscall_exiting_trace(struct tcb *, struct timespec *, int);
406 extern void syscall_exiting_finish(struct tcb *);
408 extern void count_syscall(struct tcb *, const struct timespec *);
409 extern void call_summary(FILE *);
411 extern void clear_regs(struct tcb *tcp);
412 extern int get_scno(struct tcb *);
413 extern kernel_ulong_t get_rt_sigframe_addr(struct tcb *);
416 * Convert a (shuffled) syscall number to the corresponding syscall name.
418 * @param scno Syscall number.
419 * @return String literal corresponding to the syscall number in case latter
420 * is valid; NULL otherwise.
422 extern const char *syscall_name(kernel_ulong_t scno);
424 * Convert a syscall name to the corresponding (shuffled) syscall number.
426 * @param s Syscall name.
427 * @param p Personality.
428 * @param start From which position in syscall entry table resume the search.
429 * @return Shuffled syscall number (ready to use against sysent_vec)
430 * if syscall name is found; -1 otherwise.
432 extern kernel_long_t scno_by_name(const char *s, unsigned p,
433 kernel_long_t start);
435 * Shuffle syscall numbers so that we don't have huge gaps in syscall table.
436 * The shuffling should be an involution: shuffle_scno(shuffle_scno(n)) == n.
438 * @param scno Raw or shuffled syscall number.
439 * @return Shuffled or raw syscall number, respectively.
441 extern kernel_ulong_t shuffle_scno(kernel_ulong_t scno);
442 extern const char *err_name(unsigned long err);
444 extern bool is_erestart(struct tcb *);
445 extern void temporarily_clear_syserror(struct tcb *);
446 extern void restore_cleared_syserror(struct tcb *);
448 extern void *get_tcb_priv_data(const struct tcb *);
449 extern int set_tcb_priv_data(struct tcb *, void *priv_data,
450 void (*free_priv_data)(void *));
451 extern void free_tcb_priv_data(struct tcb *);
453 static inline unsigned long get_tcb_priv_ulong(const struct tcb *tcp)
455 return (unsigned long) get_tcb_priv_data(tcp);
458 static inline int set_tcb_priv_ulong(struct tcb *tcp, unsigned long val)
460 return set_tcb_priv_data(tcp, (void *) val, 0);
464 umoven(struct tcb *, kernel_ulong_t addr, unsigned int len, void *laddr);
465 #define umove(pid, addr, objp) \
466 umoven((pid), (addr), sizeof(*(objp)), (void *) (objp))
469 umoven_or_printaddr(struct tcb *, kernel_ulong_t addr,
470 unsigned int len, void *laddr);
471 #define umove_or_printaddr(pid, addr, objp) \
472 umoven_or_printaddr((pid), (addr), sizeof(*(objp)), (void *) (objp))
475 umoven_or_printaddr_ignore_syserror(struct tcb *, kernel_ulong_t addr,
476 unsigned int len, void *laddr);
479 umovestr(struct tcb *, kernel_ulong_t addr, unsigned int len, char *laddr);
481 extern int upeek(struct tcb *tcp, unsigned long, kernel_ulong_t *);
482 extern int upoke(struct tcb *tcp, unsigned long, kernel_ulong_t);
485 print_array(struct tcb *,
486 kernel_ulong_t start_addr,
490 int (*umoven_func)(struct tcb *,
494 bool (*print_func)(struct tcb *,
500 #if HAVE_ARCH_GETRVAL2
501 extern long getrval2(struct tcb *);
504 extern const char *signame(const int);
505 extern void pathtrace_select_set(const char *, struct path_set *);
506 extern bool pathtrace_match_set(struct tcb *, struct path_set *);
507 #define pathtrace_select(tcp) \
508 pathtrace_select_set(tcp, &global_path_set)
509 #define pathtrace_match(tcp) \
510 pathtrace_match_set(tcp, &global_path_set)
511 extern int getfdpath(struct tcb *, int, char *, unsigned);
512 extern unsigned long getfdinode(struct tcb *, int);
513 extern enum sock_proto getfdproto(struct tcb *, int);
515 extern const char *xlookup(const struct xlat *, const uint64_t);
516 extern const char *xlat_search(const struct xlat *, const size_t, const uint64_t);
519 struct dyxlat *dyxlat_alloc(size_t nmemb);
520 void dyxlat_free(struct dyxlat *);
521 const struct xlat *dyxlat_get(const struct dyxlat *);
522 void dyxlat_add_pair(struct dyxlat *, uint64_t val, const char *str, size_t len);
524 const struct xlat *genl_families_xlat(struct tcb *tcp);
526 extern unsigned long get_pagesize(void);
527 extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
530 * Returns STR if it does not start with PREFIX,
531 * or a pointer to the first char in STR after PREFIX.
532 * The length of PREFIX is specified by PREFIX_LEN.
534 static inline const char *
535 str_strip_prefix_len(const char *str, const char *prefix, size_t prefix_len)
537 return strncmp(str, prefix, prefix_len) ? str : str + prefix_len;
540 #define STR_STRIP_PREFIX(str, prefix) \
541 str_strip_prefix_len((str), (prefix), sizeof(prefix) - 1)
543 #define QUOTE_0_TERMINATED 0x01
544 #define QUOTE_OMIT_LEADING_TRAILING_QUOTES 0x02
545 #define QUOTE_OMIT_TRAILING_0 0x08
546 #define QUOTE_FORCE_HEX 0x10
547 #define QUOTE_EMIT_COMMENT 0x20
549 extern int string_quote(const char *, char *, unsigned int, unsigned int,
550 const char *escape_chars);
551 extern int print_quoted_string_ex(const char *, unsigned int, unsigned int,
552 const char *escape_chars);
553 extern int print_quoted_string(const char *, unsigned int, unsigned int);
554 extern int print_quoted_cstring(const char *, unsigned int);
556 /* a refers to the lower numbered u_arg,
557 * b refers to the higher numbered u_arg
559 #ifdef WORDS_BIGENDIAN
560 # define ULONG_LONG(a, b) \
561 ((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<32))
563 # define ULONG_LONG(a, b) \
564 ((unsigned long long)(unsigned)(a) | ((unsigned long long)(b)<<32))
566 extern int getllval(struct tcb *, unsigned long long *, int);
567 extern int printllval(struct tcb *, const char *, int)
568 ATTRIBUTE_FORMAT((printf, 2, 0));
570 extern void printaddr64(uint64_t addr);
571 extern void printaddr(kernel_ulong_t addr);
572 extern int printxvals(const uint64_t, const char *, const struct xlat *, ...)
574 extern int printxval_searchn(const struct xlat *xlat, size_t xlat_size,
575 uint64_t val, const char *dflt);
577 * Wrapper around printxval_searchn that passes ARRAY_SIZE - 1
578 * as the array size, as all arrays are XLAT_END-terminated and
579 * printxval_searchn expects a size without the terminating record.
581 #define printxval_search(xlat__, val__, dflt__) \
582 printxval_searchn(xlat__, ARRAY_SIZE(xlat__) - 1, val__, dflt__)
583 extern int sprintxval(char *buf, size_t size, const struct xlat *,
584 unsigned int val, const char *dflt);
585 extern int printargs(struct tcb *);
586 extern int printargs_u(struct tcb *);
587 extern int printargs_d(struct tcb *);
589 extern void addflags(const struct xlat *, uint64_t);
590 extern int printflags_ex(uint64_t, const char *, const struct xlat *, ...)
592 extern const char *sprintflags(const char *, const struct xlat *, uint64_t);
593 extern const char *sprinttime(long long sec);
594 extern const char *sprinttime_nsec(long long sec, unsigned long long nsec);
595 extern const char *sprinttime_usec(long long sec, unsigned long long usec);
596 extern void print_symbolic_mode_t(unsigned int);
597 extern void print_numeric_umode_t(unsigned short);
598 extern void print_numeric_long_umask(unsigned long);
599 extern void print_dev_t(unsigned long long dev);
600 extern void print_abnormal_hi(kernel_ulong_t);
602 extern kernel_ulong_t *
603 fetch_indirect_syscall_args(struct tcb *, kernel_ulong_t addr, unsigned int n_args);
606 dumpiov_in_msghdr(struct tcb *, kernel_ulong_t addr, kernel_ulong_t data_size);
609 dumpiov_in_mmsghdr(struct tcb *, kernel_ulong_t addr);
612 dumpiov_upto(struct tcb *, int len, kernel_ulong_t addr, kernel_ulong_t data_size);
615 dumpstr(struct tcb *, kernel_ulong_t addr, int len);
618 printstr_ex(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len,
619 unsigned int user_style);
622 printpathn(struct tcb *, kernel_ulong_t addr, unsigned int n);
625 printpath(struct tcb *, kernel_ulong_t addr);
627 #define TIMESPEC_TEXT_BUFSIZE \
628 (sizeof(long long) * 3 * 2 + sizeof("{tv_sec=-, tv_nsec=}"))
629 extern void printfd(struct tcb *, int);
630 extern void print_sockaddr(const void *sa, int len);
632 print_inet_addr(int af, const void *addr, unsigned int len, const char *var_name);
634 decode_inet_addr(struct tcb *, kernel_ulong_t addr,
635 unsigned int len, int family, const char *var_name);
636 extern const char *get_sockaddr_by_inode(struct tcb *, int fd, unsigned long inode);
637 extern bool print_sockaddr_by_inode(struct tcb *, int fd, unsigned long inode);
638 extern void print_dirfd(struct tcb *, int);
641 decode_sockaddr(struct tcb *, kernel_ulong_t addr, int addrlen);
643 extern void printuid(const char *, const unsigned int);
646 print_sigset_addr_len(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len);
648 print_sigset_addr(struct tcb *, kernel_ulong_t addr);
650 extern const char *sprintsigmask_n(const char *, const void *, unsigned int);
651 #define tprintsigmask_addr(prefix, mask) \
652 tprints(sprintsigmask_n((prefix), (mask), sizeof(mask)))
653 extern void printsignal(int);
656 tprint_iov_upto(struct tcb *, kernel_ulong_t len, kernel_ulong_t addr,
657 enum iov_decode, kernel_ulong_t data_size);
660 decode_netlink(struct tcb *, int fd, kernel_ulong_t addr, kernel_ulong_t len);
662 extern void tprint_open_modes(unsigned int);
663 extern const char *sprint_open_modes(unsigned int);
666 decode_seccomp_fprog(struct tcb *, kernel_ulong_t addr);
669 print_seccomp_fprog(struct tcb *, kernel_ulong_t addr, unsigned short len);
672 decode_sock_fprog(struct tcb *, kernel_ulong_t addr);
675 print_sock_fprog(struct tcb *, kernel_ulong_t addr, unsigned short len);
678 extern void print_struct_stat(struct tcb *, const struct strace_stat *const st);
680 struct strace_statfs;
681 struct strace_keyctl_kdf_params;
684 print_struct_statfs(struct tcb *, kernel_ulong_t addr);
687 print_struct_statfs64(struct tcb *, kernel_ulong_t addr, kernel_ulong_t size);
689 extern void print_ifindex(unsigned int);
691 extern void qualify(const char *);
692 extern unsigned int qual_flags(const unsigned int);
694 #define DECL_IOCTL(name) \
696 name ## _ioctl(struct tcb *, unsigned int request, kernel_ulong_t arg) \
697 /* End of DECL_IOCTL definition. */
711 extern int decode_sg_io_v4(struct tcb *, const kernel_ulong_t arg);
715 typedef bool (*netlink_decoder_t)(struct tcb *, const struct nlmsghdr *,
716 kernel_ulong_t addr, unsigned int len);
718 #define DECL_NETLINK(name) \
720 decode_netlink_ ## name(struct tcb *, const struct nlmsghdr *, \
721 kernel_ulong_t addr, unsigned int len) \
722 /* End of DECL_NETLINK definition. */
724 DECL_NETLINK(crypto);
725 DECL_NETLINK(netfilter);
727 DECL_NETLINK(selinux);
728 DECL_NETLINK(sock_diag);
730 extern int ts_nz(const struct timespec *);
731 extern int ts_cmp(const struct timespec *, const struct timespec *);
732 extern double ts_float(const struct timespec *);
733 extern void ts_add(struct timespec *, const struct timespec *, const struct timespec *);
734 extern void ts_sub(struct timespec *, const struct timespec *, const struct timespec *);
735 extern void ts_mul(struct timespec *, const struct timespec *, int);
736 extern void ts_div(struct timespec *, const struct timespec *, int);
739 extern void unwind_init(void);
740 extern void unwind_tcb_init(struct tcb *);
741 extern void unwind_tcb_fin(struct tcb *);
742 extern void unwind_print_stacktrace(struct tcb *);
743 extern void unwind_capture_stacktrace(struct tcb *);
747 printstrn(struct tcb *tcp, kernel_ulong_t addr, kernel_ulong_t len)
749 return printstr_ex(tcp, addr, len, 0);
753 printstr(struct tcb *tcp, kernel_ulong_t addr)
755 return printstr_ex(tcp, addr, -1, QUOTE_0_TERMINATED);
759 printflags64(const struct xlat *x, uint64_t flags, const char *dflt)
761 return printflags_ex(flags, dflt, x, NULL);
765 printflags(const struct xlat *x, unsigned int flags, const char *dflt)
767 return printflags64(x, flags, dflt);
771 printxval64(const struct xlat *x, const uint64_t val, const char *dflt)
773 return printxvals(val, dflt, x, NULL);
777 printxval(const struct xlat *x, const unsigned int val, const char *dflt)
779 return printxvals(val, dflt, x, NULL);
783 tprint_iov(struct tcb *tcp, kernel_ulong_t len, kernel_ulong_t addr,
784 enum iov_decode decode_iov)
786 tprint_iov_upto(tcp, len, addr, decode_iov, -1);
794 extern void print_timeval32_t(const timeval32_t *);
795 extern void printrusage32(struct tcb *, kernel_ulong_t);
796 extern const char *sprint_timeval32(struct tcb *, kernel_ulong_t addr);
797 extern void print_timeval32(struct tcb *, kernel_ulong_t addr);
798 extern void print_timeval32_utimes(struct tcb *, kernel_ulong_t addr);
799 extern void print_itimerval32(struct tcb *, kernel_ulong_t addr);
802 #ifdef HAVE_STRUCT_USER_DESC
804 * Filter what to print from the point of view of the get_thread_area syscall.
805 * Kernel copies only entry_number field at first and then tries to write the
808 enum user_desc_print_filter {
809 /* Print the "entering" part of struct user_desc - entry_number. */
810 USER_DESC_ENTERING = 1,
811 /* Print the "exiting" part of the structure. */
812 USER_DESC_EXITING = 2,
813 USER_DESC_BOTH = USER_DESC_ENTERING | USER_DESC_EXITING,
816 extern void print_user_desc(struct tcb *, kernel_ulong_t addr,
817 enum user_desc_print_filter filter);
820 /* Strace log generation machinery.
822 * printing_tcp: tcb which has incomplete line being printed right now.
823 * NULL if last line has been completed ('\n'-terminated).
824 * printleader(tcp) examines it, finishes incomplete line if needed,
825 * the sets it to tcp.
826 * line_ended() clears printing_tcp and resets ->curcol = 0.
827 * tcp->curcol == 0 check is also used to detect completeness
828 * of last line, since in -ff mode just checking printing_tcp for NULL
831 * If you change this code, test log generation in both -f and -ff modes
833 * strace -oLOG -f[f] test/threaded_execve
834 * strace -oLOG -f[f] test/sigkill_rain
835 * strace -oLOG -f[f] -p "`pidof web_browser`"
837 extern struct tcb *printing_tcp;
838 extern void printleader(struct tcb *);
839 extern void line_ended(void);
840 extern void tabto(void);
841 extern void tprintf(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
842 extern void tprints(const char *str);
843 extern void tprintf_comment(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
844 extern void tprints_comment(const char *str);
846 #if SUPPORTED_PERSONALITIES > 1
847 extern void set_personality(unsigned int personality);
848 extern unsigned current_personality;
850 # define set_personality(personality) ((void)0)
851 # define current_personality 0
854 #if SUPPORTED_PERSONALITIES == 1
855 # define current_wordsize PERSONALITY0_WORDSIZE
856 # define current_klongsize PERSONALITY0_KLONGSIZE
858 # if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE
859 # define current_wordsize PERSONALITY0_WORDSIZE
861 extern unsigned current_wordsize;
863 # if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_KLONGSIZE == PERSONALITY1_KLONGSIZE
864 # define current_klongsize PERSONALITY0_KLONGSIZE
866 extern unsigned current_klongsize;
870 #if SIZEOF_KERNEL_LONG_T > 4 \
871 && (SIZEOF_LONG < SIZEOF_KERNEL_LONG_T || !defined(current_wordsize))
872 # define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG 1
874 # define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG 0
877 #define DECL_PRINTNUM(name) \
879 printnum_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
880 ATTRIBUTE_FORMAT((printf, 3, 0)) \
881 /* End of DECL_PRINTNUM definition. */
883 DECL_PRINTNUM(short);
885 DECL_PRINTNUM(int64);
888 #define DECL_PRINTNUM_ADDR(name) \
890 printnum_addr_ ## name(struct tcb *, kernel_ulong_t addr) \
891 /* End of DECL_PRINTNUM_ADDR definition. */
893 DECL_PRINTNUM_ADDR(int);
894 DECL_PRINTNUM_ADDR(int64);
895 #undef DECL_PRINTNUM_ADDR
897 #ifndef current_wordsize
899 printnum_long_int(struct tcb *, kernel_ulong_t addr,
900 const char *fmt_long, const char *fmt_int)
901 ATTRIBUTE_FORMAT((printf, 3, 0))
902 ATTRIBUTE_FORMAT((printf, 4, 0));
903 extern bool printnum_addr_long_int(struct tcb *, kernel_ulong_t addr);
904 # define printnum_slong(tcp, addr) \
905 printnum_long_int((tcp), (addr), "%" PRId64, "%d")
906 # define printnum_ulong(tcp, addr) \
907 printnum_long_int((tcp), (addr), "%" PRIu64, "%u")
908 # define printnum_ptr(tcp, addr) \
909 printnum_addr_long_int((tcp), (addr))
910 #elif current_wordsize > 4
911 # define printnum_slong(tcp, addr) \
912 printnum_int64((tcp), (addr), "%" PRId64)
913 # define printnum_ulong(tcp, addr) \
914 printnum_int64((tcp), (addr), "%" PRIu64)
915 # define printnum_ptr(tcp, addr) \
916 printnum_addr_int64((tcp), (addr))
917 #else /* current_wordsize == 4 */
918 # define printnum_slong(tcp, addr) \
919 printnum_int((tcp), (addr), "%d")
920 # define printnum_ulong(tcp, addr) \
921 printnum_int((tcp), (addr), "%u")
922 # define printnum_ptr(tcp, addr) \
923 printnum_addr_int((tcp), (addr))
926 #ifndef current_klongsize
927 extern bool printnum_addr_klong_int(struct tcb *, kernel_ulong_t addr);
928 # define printnum_kptr(tcp, addr) \
929 printnum_addr_klong_int((tcp), (addr))
930 #elif current_klongsize > 4
931 # define printnum_kptr(tcp, addr) \
932 printnum_addr_int64((tcp), (addr))
933 #else /* current_klongsize == 4 */
934 # define printnum_kptr(tcp, addr) \
935 printnum_addr_int((tcp), (addr))
938 #define DECL_PRINTPAIR(name) \
940 printpair_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
941 ATTRIBUTE_FORMAT((printf, 3, 0)) \
942 /* End of DECL_PRINTPAIR definition. */
945 DECL_PRINTPAIR(int64);
946 #undef DECL_PRINTPAIR
948 static inline kernel_long_t
949 truncate_klong_to_current_wordsize(const kernel_long_t v)
951 #if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
952 if (current_wordsize < sizeof(v)) {
961 static inline kernel_ulong_t
962 truncate_kulong_to_current_wordsize(const kernel_ulong_t v)
964 #if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
965 if (current_wordsize < sizeof(v)) {
966 return (unsigned int) v;
975 * Cast a pointer or a pointer-sized integer to kernel_ulong_t.
977 #define ptr_to_kulong(v) ((kernel_ulong_t) (unsigned long) (v))
980 * Zero-extend a signed integer type to unsigned long long.
982 #define zero_extend_signed_to_ull(v) \
983 (sizeof(v) == sizeof(char) ? (unsigned long long) (unsigned char) (v) : \
984 sizeof(v) == sizeof(short) ? (unsigned long long) (unsigned short) (v) : \
985 sizeof(v) == sizeof(int) ? (unsigned long long) (unsigned int) (v) : \
986 sizeof(v) == sizeof(long) ? (unsigned long long) (unsigned long) (v) : \
987 (unsigned long long) (v))
990 * Sign-extend an unsigned integer type to long long.
992 #define sign_extend_unsigned_to_ll(v) \
993 (sizeof(v) == sizeof(char) ? (long long) (char) (v) : \
994 sizeof(v) == sizeof(short) ? (long long) (short) (v) : \
995 sizeof(v) == sizeof(int) ? (long long) (int) (v) : \
996 sizeof(v) == sizeof(long) ? (long long) (long) (v) : \
999 extern const struct_sysent sysent0[];
1000 extern const char *const errnoent0[];
1001 extern const char *const signalent0[];
1002 extern const struct_ioctlent ioctlent0[];
1004 extern const char *const personality_names[];
1006 #if SUPPORTED_PERSONALITIES > 1
1007 extern const struct_sysent *sysent;
1008 extern const char *const *errnoent;
1009 extern const char *const *signalent;
1010 extern const struct_ioctlent *ioctlent;
1012 # define sysent sysent0
1013 # define errnoent errnoent0
1014 # define signalent signalent0
1015 # define ioctlent ioctlent0
1018 extern unsigned nsyscalls;
1019 extern unsigned nerrnos;
1020 extern unsigned nsignals;
1021 extern unsigned nioctlents;
1023 extern const unsigned int nsyscall_vec[SUPPORTED_PERSONALITIES];
1024 extern const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES];
1025 extern struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
1027 uint16_t alloc_delay_data(void);
1028 void fill_delay_data(uint16_t delay_idx, int intval, bool isenter);
1029 bool is_delay_timer_armed(void);
1030 void delay_timer_expired(void);
1031 void arm_delay_timer(const struct tcb *);
1032 void delay_tcb(struct tcb *, uint16_t delay_idx, bool isenter);
1034 #ifdef IN_MPERS_BOOTSTRAP
1035 /* Transform multi-line MPERS_PRINTER_DECL statements to one-liners. */
1036 # define MPERS_PRINTER_DECL(type, name, ...) MPERS_PRINTER_DECL(type, name, __VA_ARGS__)
1037 #else /* !IN_MPERS_BOOTSTRAP */
1038 # if SUPPORTED_PERSONALITIES > 1
1039 # include "printers.h"
1041 # include "native_printer_decls.h"
1043 # define MPERS_PRINTER_DECL(type, name, ...) type MPERS_FUNC_NAME(name)(__VA_ARGS__)
1044 #endif /* !IN_MPERS_BOOTSTRAP */
1046 /* Checks that sysent[scno] is not out of range. */
1048 scno_in_range(kernel_ulong_t scno)
1050 return scno < nsyscalls;
1054 * Checks whether scno is not out of range,
1055 * its corresponding sysent[scno].sys_func is non-NULL,
1056 * and its sysent[scno].sys_flags has no TRACE_INDIRECT_SUBCALL flag set.
1059 scno_is_valid(kernel_ulong_t scno)
1061 return scno_in_range(scno)
1062 && sysent[scno].sys_func
1063 && !(sysent[scno].sys_flags & TRACE_INDIRECT_SUBCALL);
1066 #define MPERS_FUNC_NAME__(prefix, name) prefix ## name
1067 #define MPERS_FUNC_NAME_(prefix, name) MPERS_FUNC_NAME__(prefix, name)
1068 #define MPERS_FUNC_NAME(name) MPERS_FUNC_NAME_(MPERS_PREFIX, name)
1070 #define SYS_FUNC_NAME(syscall_name) MPERS_FUNC_NAME(syscall_name)
1072 #define SYS_FUNC(syscall_name) int SYS_FUNC_NAME(sys_ ## syscall_name)(struct tcb *tcp)
1074 #endif /* !STRACE_DEFS_H */