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) 2001-2017 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 "kernel_types.h"
57 #include "mpers_type.h"
58 #include "gcc_compat.h"
62 const char *strerror(int);
65 /* Some libc have stpcpy, some don't. Sigh...
66 * Roll our private implementation...
69 #define stpcpy strace_stpcpy
70 extern char *stpcpy(char *dst, const char *src);
74 # define offsetofend(type, member) \
75 (offsetof(type, member) + sizeof(((type *)NULL)->member))
78 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]) + MUST_BE_ARRAY(a))
82 # define MAX(a, b) (((a) > (b)) ? (a) : (b))
85 # define MIN(a, b) (((a) < (b)) ? (a) : (b))
87 #define CLAMP(val, min, max) MIN(MAX(min, val), max)
89 /* Glibc has an efficient macro for sigemptyset
90 * (it just does one or two assignments of 0 to internal vector of longs).
92 #if defined(__GLIBC__) && defined(__sigemptyset) && !defined(sigemptyset)
93 # define sigemptyset __sigemptyset
96 /* Configuration section */
97 #ifndef DEFAULT_STRLEN
98 /* default maximum # of bytes printed in `printstr', change with -s switch */
99 # define DEFAULT_STRLEN 32
101 #ifndef DEFAULT_ACOLUMN
102 # define DEFAULT_ACOLUMN 40 /* default alignment column for results */
105 * Maximum number of args to a syscall.
107 * Make sure that all entries in all syscallent.h files have nargs <= MAX_ARGS!
108 * linux/<ARCH>/syscallent*.h:
109 * all have nargs <= 6 except mips o32 which has nargs <= 7.
112 # ifdef LINUX_MIPSO32
118 /* default sorting method for call profiling */
119 #ifndef DEFAULT_SORTBY
120 # define DEFAULT_SORTBY "time"
123 * Experimental code using PTRACE_SEIZE can be enabled here.
124 * This needs Linux kernel 3.4.x or later to work.
127 /* To force NOMMU build, set to 1 */
128 #define NOMMU_SYSTEM 0
131 # define ERESTARTSYS 512
133 #ifndef ERESTARTNOINTR
134 # define ERESTARTNOINTR 513
136 #ifndef ERESTARTNOHAND
137 # define ERESTARTNOHAND 514
139 #ifndef ERESTART_RESTARTBLOCK
140 # define ERESTART_RESTARTBLOCK 516
144 # define SUPPORTED_PERSONALITIES 3
145 # define PERSONALITY2_WORDSIZE 4
146 # define PERSONALITY2_KLONGSIZE PERSONALITY0_KLONGSIZE
147 #elif defined AARCH64 \
148 || defined POWERPC64 \
153 # define SUPPORTED_PERSONALITIES 2
155 # define SUPPORTED_PERSONALITIES 1
158 #if defined TILE && defined __tilepro__
159 # define DEFAULT_PERSONALITY 1
161 # define DEFAULT_PERSONALITY 0
164 #define PERSONALITY0_WORDSIZE SIZEOF_LONG
165 #define PERSONALITY0_KLONGSIZE SIZEOF_KERNEL_LONG_T
166 #define PERSONALITY0_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
167 #define PERSONALITY0_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
169 #if SUPPORTED_PERSONALITIES > 1
170 # define PERSONALITY1_WORDSIZE 4
171 # define PERSONALITY1_KLONGSIZE PERSONALITY1_WORDSIZE
174 #if SUPPORTED_PERSONALITIES > 1 && defined HAVE_M32_MPERS
175 # define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
176 # define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
177 # define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
178 # define MPERS_m32_IOCTL_MACROS "ioctl_redefs1.h"
180 # define PERSONALITY1_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
181 # define PERSONALITY1_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
182 # define PERSONALITY1_INCLUDE_FUNCS "empty.h"
185 #if SUPPORTED_PERSONALITIES > 2 && defined HAVE_MX32_MPERS
186 # define PERSONALITY2_INCLUDE_FUNCS "mx32_funcs.h"
187 # define PERSONALITY2_INCLUDE_PRINTERS_DECLS "mx32_printer_decls.h"
188 # define PERSONALITY2_INCLUDE_PRINTERS_DEFS "mx32_printer_defs.h"
189 # define MPERS_mx32_IOCTL_MACROS "ioctl_redefs2.h"
191 # define PERSONALITY2_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
192 # define PERSONALITY2_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
193 # define PERSONALITY2_INCLUDE_FUNCS "empty.h"
196 typedef struct ioctlent {
208 #define MAX_ERRNO_VALUE 4095
209 #define INJECT_OPTS_RVAL_DEFAULT (-(MAX_ERRNO_VALUE + 1))
211 /* Trace Control Block */
213 int flags; /* See below for TCB_ values */
214 int pid; /* If 0, this tcb is free */
215 int qual_flg; /* qual_flags[scno] or DEFAULT_QUAL_FLAGS + RAW */
216 unsigned long u_error; /* Error code */
217 kernel_ulong_t scno; /* System call number */
218 kernel_ulong_t u_arg[MAX_ARGS]; /* System call arguments */
219 kernel_long_t u_rval; /* Return value */
220 #if SUPPORTED_PERSONALITIES > 1
221 unsigned int currpers; /* Personality at the time of scno update */
223 int sys_func_rval; /* Syscall entry parser's return value */
224 int curcol; /* Output column for this process */
225 FILE *outf; /* Output file for this process */
226 const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
227 void *_priv_data; /* Private data for syscall decoding functions */
228 void (*_free_priv_data)(void *); /* Callback for freeing priv_data */
229 const struct_sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */
230 const struct_sysent *s_prev_ent; /* for "resuming interrupted SYSCALL" msg */
231 struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
232 struct timeval stime; /* System time usage as of last process wait */
233 struct timeval dtime; /* Delta for system time usage */
234 struct timeval etime; /* Syscall entry time */
237 struct UPT_info* libunwind_ui;
238 struct mmap_cache_t* mmap_cache;
239 unsigned int mmap_cache_size;
240 unsigned int mmap_cache_generation;
241 struct queue_t* queue;
246 /* We have attached to this process, but did not see it stopping yet */
247 #define TCB_STARTUP 0x01
248 #define TCB_IGNORE_ONE_SIGSTOP 0x02 /* Next SIGSTOP is to be ignored */
250 * Are we in system call entry or in syscall exit?
252 * This bit is set in syscall_entering_finish() and cleared in
253 * syscall_exiting_finish().
254 * Other stops which are possible directly after syscall entry (death, ptrace
255 * event stop) are handled without calling syscall_{entering,exiting}_*().
257 * Use entering(tcp) / exiting(tcp) to check this bit to make code more
260 #define TCB_INSYSCALL 0x04
261 #define TCB_ATTACHED 0x08 /* We attached to it already */
262 #define TCB_REPRINT 0x10 /* We should reprint this syscall on exit */
263 #define TCB_FILTERED 0x20 /* This system call has been filtered out */
264 #define TCB_TAMPERED 0x40 /* A syscall has been tampered with */
265 #define TCB_HIDE_LOG 0x80 /* We should hide everything (until execve) */
266 #define TCB_SKIP_DETACH_ON_FIRST_EXEC 0x100 /* -b execve should skip detach on first execve */
268 /* qualifier flags */
269 #define QUAL_TRACE 0x001 /* this system call should be traced */
270 #define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */
271 #define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */
272 #define QUAL_RAW 0x008 /* print all args in hex for this syscall */
273 #define QUAL_INJECT 0x010 /* tamper with this system call on purpose */
274 #define QUAL_SIGNAL 0x100 /* report events with this signal */
275 #define QUAL_READ 0x200 /* dump data read from this file descriptor */
276 #define QUAL_WRITE 0x400 /* dump data written to this file descriptor */
278 #define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE)
280 #define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL))
281 #define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL)
282 #define syserror(tcp) ((tcp)->u_error != 0)
283 #define verbose(tcp) ((tcp)->qual_flg & QUAL_VERBOSE)
284 #define abbrev(tcp) ((tcp)->qual_flg & QUAL_ABBREV)
285 #define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
286 #define hide_log(tcp) ((tcp)->flags & TCB_HIDE_LOG)
290 extern const struct xlat addrfams[];
291 extern const struct xlat at_flags[];
292 extern const struct xlat clocknames[];
293 extern const struct xlat dirent_types[];
294 extern const struct xlat ethernet_protocols[];
295 extern const struct xlat evdev_abs[];
296 extern const struct xlat msg_flags[];
297 extern const struct xlat netlink_protocols[];
298 extern const struct xlat open_access_modes[];
299 extern const struct xlat open_mode_flags[];
300 extern const struct xlat resource_flags[];
301 extern const struct xlat setns_types[];
302 extern const struct xlat sg_io_info[];
303 extern const struct xlat socketlayers[];
304 extern const struct xlat socktypes[];
305 extern const struct xlat whence_codes[];
307 /* Format of syscall return values */
308 #define RVAL_DECIMAL 000 /* decimal format */
309 #define RVAL_HEX 001 /* hex format */
310 #define RVAL_OCTAL 002 /* octal format */
311 #define RVAL_UDECIMAL 003 /* unsigned decimal format */
312 #define RVAL_FD 010 /* file descriptor */
313 #define RVAL_MASK 013 /* mask for these values */
315 #define RVAL_STR 020 /* Print `auxstr' field after return val */
316 #define RVAL_NONE 040 /* Print nothing */
318 #define RVAL_DECODED 0100 /* syscall decoding finished */
320 #define IOCTL_NUMBER_UNKNOWN 0
321 #define IOCTL_NUMBER_HANDLED 1
322 #define IOCTL_NUMBER_STOP_LOOKUP 010
324 #define indirect_ipccall(tcp) (tcp->s_ent->sys_flags & TRACE_INDIRECT_SUBCALL)
326 #if defined(ARM) || defined(AARCH64) \
327 || defined(I386) || defined(X32) || defined(X86_64) \
331 || defined(MICROBLAZE) \
334 || defined(SH) || defined(SH64) \
335 || defined(SPARC) || defined(SPARC64) \
337 # define NEED_UID16_PARSERS 1
339 # define NEED_UID16_PARSERS 0
351 extern enum sock_proto get_proto_by_name(const char *);
364 extern cflag_t cflag;
365 extern bool debug_flag;
368 extern bool count_wallclock;
369 extern unsigned int qflag;
370 extern bool not_failing_only;
371 extern unsigned int show_fd_path;
372 /* are we filtering traces based on paths? */
373 extern const char **paths_selected;
374 #define tracing_paths (paths_selected != NULL)
375 extern unsigned xflag;
376 extern unsigned followfork;
378 /* if this is true do the stack trace for every system call */
379 extern bool stack_trace_enabled;
381 extern unsigned ptrace_setoptions;
382 extern unsigned max_strlen;
383 extern unsigned os_release;
384 #undef KERNEL_VERSION
385 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
387 void error_msg(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
388 void perror_msg(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
389 void error_msg_and_die(const char *fmt, ...)
390 ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
391 void error_msg_and_help(const char *fmt, ...)
392 ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
393 void perror_msg_and_die(const char *fmt, ...)
394 ATTRIBUTE_FORMAT((printf, 1, 2)) ATTRIBUTE_NORETURN;
395 void die_out_of_memory(void) ATTRIBUTE_NORETURN;
397 void *xmalloc(size_t size) ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1));
398 void *xcalloc(size_t nmemb, size_t size)
399 ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1, 2));
400 void *xreallocarray(void *ptr, size_t nmemb, size_t size)
401 ATTRIBUTE_ALLOC_SIZE((2, 3));
402 char *xstrdup(const char *str) ATTRIBUTE_MALLOC;
404 extern int read_int_from_file(const char *, int *);
406 extern void set_sortby(const char *);
407 extern void set_overhead(int);
408 extern void print_pc(struct tcb *);
410 extern int syscall_entering_decode(struct tcb *);
411 extern int syscall_entering_trace(struct tcb *, unsigned int *);
412 extern void syscall_entering_finish(struct tcb *, int);
414 extern int syscall_exiting_decode(struct tcb *, struct timeval *);
415 extern int syscall_exiting_trace(struct tcb *, struct timeval, int);
416 extern void syscall_exiting_finish(struct tcb *);
418 extern void count_syscall(struct tcb *, const struct timeval *);
419 extern void call_summary(FILE *);
421 extern void clear_regs(void);
422 extern int get_scno(struct tcb *);
423 extern kernel_ulong_t get_rt_sigframe_addr(struct tcb *);
426 * Convert syscall number to syscall name.
428 * @param scno Syscall number.
429 * @return String literal corresponding to the syscall number in case latter
430 * is valid; NULL otherwise.
432 extern const char *syscall_name(kernel_ulong_t scno);
433 extern const char *err_name(unsigned long err);
435 extern bool is_erestart(struct tcb *);
436 extern void temporarily_clear_syserror(struct tcb *);
437 extern void restore_cleared_syserror(struct tcb *);
439 extern void *get_tcb_priv_data(const struct tcb *);
440 extern int set_tcb_priv_data(struct tcb *, void *priv_data,
441 void (*free_priv_data)(void *));
442 extern void free_tcb_priv_data(struct tcb *);
444 static inline unsigned long get_tcb_priv_ulong(const struct tcb *tcp)
446 return (unsigned long) get_tcb_priv_data(tcp);
449 static inline int set_tcb_priv_ulong(struct tcb *tcp, unsigned long val)
451 return set_tcb_priv_data(tcp, (void *) val, 0);
455 umoven(struct tcb *tcp, kernel_ulong_t addr, unsigned int len, void *laddr);
456 #define umove(pid, addr, objp) \
457 umoven((pid), (addr), sizeof(*(objp)), (void *) (objp))
460 umoven_or_printaddr(struct tcb *tcp, kernel_ulong_t addr,
461 unsigned int len, void *laddr);
462 #define umove_or_printaddr(pid, addr, objp) \
463 umoven_or_printaddr((pid), (addr), sizeof(*(objp)), (void *) (objp))
466 umoven_or_printaddr_ignore_syserror(struct tcb *tcp, kernel_ulong_t addr,
467 unsigned int len, void *laddr);
470 umovestr(struct tcb *tcp, kernel_ulong_t addr, unsigned int len, char *laddr);
472 extern int upeek(int pid, unsigned long, kernel_ulong_t *);
473 extern int upoke(int pid, unsigned long, kernel_ulong_t);
476 print_array(struct tcb *tcp,
477 kernel_ulong_t start_addr,
481 int (*umoven_func)(struct tcb *,
485 bool (*print_func)(struct tcb *,
491 #if defined ALPHA || defined IA64 || defined MIPS \
492 || defined SH || defined SPARC || defined SPARC64
493 # define HAVE_GETRVAL2
494 extern long getrval2(struct tcb *);
496 # undef HAVE_GETRVAL2
499 extern const char *signame(const int);
500 extern void pathtrace_select(const char *);
501 extern int pathtrace_match(struct tcb *);
502 extern int getfdpath(struct tcb *, int, char *, unsigned);
503 extern unsigned long getfdinode(struct tcb *, int);
504 extern enum sock_proto getfdproto(struct tcb *, int);
506 extern const char *xlookup(const struct xlat *, const uint64_t);
507 extern const char *xlat_search(const struct xlat *, const size_t, const uint64_t);
509 extern unsigned long get_pagesize(void);
511 string_to_uint_ex(const char *str, char **endptr,
512 unsigned int max_val, const char *accepted_ending);
513 extern int string_to_uint(const char *str);
515 string_to_uint_upto(const char *const str, unsigned int max_val)
517 return string_to_uint_ex(str, NULL, max_val, NULL);
519 extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
522 * Returns STR if it does not start with PREFIX,
523 * or a pointer to the first char in STR after PREFIX.
524 * The length of PREFIX is specified by PREFIX_LEN.
526 static inline const char *
527 str_strip_prefix_len(const char *str, const char *prefix, size_t prefix_len)
529 return strncmp(str, prefix, prefix_len) ? str : str + prefix_len;
532 #define STR_STRIP_PREFIX(str, prefix) \
533 str_strip_prefix_len((str), (prefix), sizeof(prefix) - 1)
535 #define QUOTE_0_TERMINATED 0x01
536 #define QUOTE_OMIT_LEADING_TRAILING_QUOTES 0x02
537 #define QUOTE_OMIT_TRAILING_0 0x08
538 #define QUOTE_FORCE_HEX 0x10
540 extern int string_quote(const char *, char *, unsigned int, unsigned int);
541 extern int print_quoted_string(const char *, unsigned int, unsigned int);
543 /* a refers to the lower numbered u_arg,
544 * b refers to the higher numbered u_arg
546 #ifdef WORDS_BIGENDIAN
547 # define ULONG_LONG(a,b) \
548 ((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<32))
550 # define ULONG_LONG(a,b) \
551 ((unsigned long long)(unsigned)(a) | ((unsigned long long)(b)<<32))
553 extern int getllval(struct tcb *, unsigned long long *, int);
554 extern int printllval(struct tcb *, const char *, int)
555 ATTRIBUTE_FORMAT((printf, 2, 0));
557 extern void printaddr(kernel_ulong_t addr);
558 extern int printxvals(const uint64_t, const char *, const struct xlat *, ...)
560 extern int printxval_searchn(const struct xlat *xlat, size_t xlat_size,
561 uint64_t val, const char *dflt);
562 #define printxval_search(xlat__, val__, dflt__) \
563 printxval_searchn(xlat__, ARRAY_SIZE(xlat__), val__, dflt__)
564 extern int printargs(struct tcb *);
565 extern int printargs_u(struct tcb *);
566 extern int printargs_d(struct tcb *);
568 extern void addflags(const struct xlat *, uint64_t);
569 extern int printflags_ex(uint64_t, const char *, const struct xlat *, ...)
571 extern const char *sprintflags(const char *, const struct xlat *, uint64_t);
572 extern const char *sprinttime(long long sec);
573 extern const char *sprinttime_nsec(long long sec, unsigned long long nsec);
574 extern const char *sprinttime_usec(long long sec, unsigned long long usec);
575 extern void print_symbolic_mode_t(unsigned int);
576 extern void print_numeric_umode_t(unsigned short);
577 extern void print_numeric_long_umask(unsigned long);
578 extern void print_dev_t(unsigned long long dev);
579 extern void print_abnormal_hi(kernel_ulong_t);
582 dumpiov_in_msghdr(struct tcb *, kernel_ulong_t addr, kernel_ulong_t data_size);
585 dumpiov_in_mmsghdr(struct tcb *, kernel_ulong_t addr);
588 dumpiov_upto(struct tcb *, int len, kernel_ulong_t addr, kernel_ulong_t data_size);
591 dumpstr(struct tcb *, kernel_ulong_t addr, int len);
594 printstr_ex(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len,
595 unsigned int user_style);
598 printpathn(struct tcb *, kernel_ulong_t addr, unsigned int n);
601 printpath(struct tcb *, kernel_ulong_t addr);
603 #define TIMESPEC_TEXT_BUFSIZE \
604 (sizeof(long long) * 3 * 2 + sizeof("{tv_sec=-, tv_nsec=}"))
605 extern void printfd(struct tcb *, int);
606 extern void print_sockaddr(struct tcb *tcp, const void *, int);
607 extern const char *get_sockaddr_by_inode(struct tcb *, int fd, unsigned long inode);
608 extern bool print_sockaddr_by_inode(struct tcb *, int fd, unsigned long inode);
609 extern void print_dirfd(struct tcb *, int);
612 decode_sockaddr(struct tcb *, kernel_ulong_t addr, int addrlen);
614 extern void printuid(const char *, const unsigned int);
617 print_sigset_addr_len(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len);
619 print_sigset_addr(struct tcb *, kernel_ulong_t addr);
621 extern const char *sprintsigmask_n(const char *, const void *, unsigned int);
622 #define tprintsigmask_addr(prefix, mask) \
623 tprints(sprintsigmask_n((prefix), (mask), sizeof(mask)))
624 extern void printsignal(int);
627 tprint_iov_upto(struct tcb *, kernel_ulong_t len, kernel_ulong_t addr,
628 enum iov_decode, kernel_ulong_t data_size);
631 decode_netlink(struct tcb *, int fd, kernel_ulong_t addr, kernel_ulong_t len);
633 extern void tprint_open_modes(unsigned int);
634 extern const char *sprint_open_modes(unsigned int);
637 print_seccomp_filter(struct tcb *, kernel_ulong_t addr);
640 print_seccomp_fprog(struct tcb *, kernel_ulong_t addr, unsigned short len);
643 extern void print_struct_stat(struct tcb *tcp, const struct strace_stat *const st);
645 struct strace_statfs;
648 print_struct_statfs(struct tcb *, kernel_ulong_t addr);
651 print_struct_statfs64(struct tcb *, kernel_ulong_t addr, kernel_ulong_t size);
653 extern void print_ifindex(unsigned int);
656 extern struct number_set read_set;
657 extern struct number_set write_set;
658 extern struct number_set signal_set;
660 extern bool is_number_in_set(unsigned int number, const struct number_set *);
661 extern void qualify(const char *);
662 extern unsigned int qual_flags(const unsigned int);
664 #define DECL_IOCTL(name) \
666 name ## _ioctl(struct tcb *, unsigned int request, kernel_ulong_t arg)
678 extern int decode_sg_io_v4(struct tcb *, const kernel_ulong_t arg);
682 typedef bool (*netlink_decoder_t)(struct tcb *, const struct nlmsghdr *,
683 kernel_ulong_t addr, kernel_ulong_t len);
685 #define DECL_NETLINK(name) \
687 decode_netlink_ ## name(struct tcb *, const struct nlmsghdr *, \
688 kernel_ulong_t addr, kernel_ulong_t len)
689 DECL_NETLINK(sock_diag);
691 extern int tv_nz(const struct timeval *);
692 extern int tv_cmp(const struct timeval *, const struct timeval *);
693 extern double tv_float(const struct timeval *);
694 extern void tv_add(struct timeval *, const struct timeval *, const struct timeval *);
695 extern void tv_sub(struct timeval *, const struct timeval *, const struct timeval *);
696 extern void tv_mul(struct timeval *, const struct timeval *, int);
697 extern void tv_div(struct timeval *, const struct timeval *, int);
700 extern void unwind_init(void);
701 extern void unwind_tcb_init(struct tcb *tcp);
702 extern void unwind_tcb_fin(struct tcb *tcp);
703 extern void unwind_cache_invalidate(struct tcb* tcp);
704 extern void unwind_print_stacktrace(struct tcb* tcp);
705 extern void unwind_capture_stacktrace(struct tcb* tcp);
709 printstrn(struct tcb *tcp, kernel_ulong_t addr, kernel_ulong_t len)
711 printstr_ex(tcp, addr, len, 0);
715 printstr(struct tcb *tcp, kernel_ulong_t addr)
717 printstr_ex(tcp, addr, -1, QUOTE_0_TERMINATED);
721 printflags64(const struct xlat *x, uint64_t flags, const char *dflt)
723 return printflags_ex(flags, dflt, x, NULL);
727 printflags(const struct xlat *x, unsigned int flags, const char *dflt)
729 return printflags64(x, flags, dflt);
733 printxval64(const struct xlat *x, const uint64_t val, const char *dflt)
735 return printxvals(val, dflt, x, NULL);
739 printxval(const struct xlat *x, const unsigned int val, const char *dflt)
741 return printxvals(val, dflt, x, NULL);
745 tprint_iov(struct tcb *tcp, kernel_ulong_t len, kernel_ulong_t addr,
746 enum iov_decode decode_iov)
748 tprint_iov_upto(tcp, len, addr, decode_iov, -1);
756 extern void print_timeval32_t(const timeval32_t *);
757 extern void printrusage32(struct tcb *, kernel_ulong_t);
758 extern const char *sprint_timeval32(struct tcb *tcp, kernel_ulong_t);
759 extern void print_timeval32(struct tcb *tcp, kernel_ulong_t);
760 extern void print_timeval32_utimes(struct tcb *tcp, kernel_ulong_t);
761 extern void print_itimerval32(struct tcb *tcp, kernel_ulong_t);
764 #ifdef HAVE_STRUCT_USER_DESC
765 extern void print_user_desc(struct tcb *, kernel_ulong_t addr);
768 /* Strace log generation machinery.
770 * printing_tcp: tcb which has incomplete line being printed right now.
771 * NULL if last line has been completed ('\n'-terminated).
772 * printleader(tcp) examines it, finishes incomplete line if needed,
773 * the sets it to tcp.
774 * line_ended() clears printing_tcp and resets ->curcol = 0.
775 * tcp->curcol == 0 check is also used to detect completeness
776 * of last line, since in -ff mode just checking printing_tcp for NULL
779 * If you change this code, test log generation in both -f and -ff modes
781 * strace -oLOG -f[f] test/threaded_execve
782 * strace -oLOG -f[f] test/sigkill_rain
783 * strace -oLOG -f[f] -p "`pidof web_browser`"
785 extern struct tcb *printing_tcp;
786 extern void printleader(struct tcb *);
787 extern void line_ended(void);
788 extern void tabto(void);
789 extern void tprintf(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
790 extern void tprints(const char *str);
791 extern void tprintf_comment(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
792 extern void tprints_comment(const char *str);
794 #if SUPPORTED_PERSONALITIES > 1
795 extern void set_personality(int personality);
796 extern unsigned current_personality;
798 # define set_personality(personality) ((void)0)
799 # define current_personality 0
802 #if SUPPORTED_PERSONALITIES == 1
803 # define current_wordsize PERSONALITY0_WORDSIZE
804 # define current_klongsize PERSONALITY0_KLONGSIZE
806 # if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE
807 # define current_wordsize PERSONALITY0_WORDSIZE
809 extern unsigned current_wordsize;
811 # if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_KLONGSIZE == PERSONALITY1_KLONGSIZE
812 # define current_klongsize PERSONALITY0_KLONGSIZE
814 extern unsigned current_klongsize;
818 #define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG \
819 (SIZEOF_KERNEL_LONG_T > 4 \
820 && (SIZEOF_LONG < SIZEOF_KERNEL_LONG_T || !defined(current_wordsize)))
822 #define DECL_PRINTNUM(name) \
824 printnum_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
825 ATTRIBUTE_FORMAT((printf, 3, 0))
826 DECL_PRINTNUM(short);
828 DECL_PRINTNUM(int64);
831 #define DECL_PRINTNUM_ADDR(name) \
833 printnum_addr_ ## name(struct tcb *, kernel_ulong_t addr)
834 DECL_PRINTNUM_ADDR(int);
835 DECL_PRINTNUM_ADDR(int64);
836 #undef DECL_PRINTNUM_ADDR
838 #ifndef current_wordsize
840 printnum_long_int(struct tcb *, kernel_ulong_t addr,
841 const char *fmt_long, const char *fmt_int)
842 ATTRIBUTE_FORMAT((printf, 3, 0))
843 ATTRIBUTE_FORMAT((printf, 4, 0));
844 extern bool printnum_addr_long_int(struct tcb *, kernel_ulong_t addr);
845 # define printnum_slong(tcp, addr) \
846 printnum_long_int((tcp), (addr), "%" PRId64, "%d")
847 # define printnum_ulong(tcp, addr) \
848 printnum_long_int((tcp), (addr), "%" PRIu64, "%u")
849 # define printnum_ptr(tcp, addr) \
850 printnum_addr_long_int((tcp), (addr))
851 #elif current_wordsize > 4
852 # define printnum_slong(tcp, addr) \
853 printnum_int64((tcp), (addr), "%" PRId64)
854 # define printnum_ulong(tcp, addr) \
855 printnum_int64((tcp), (addr), "%" PRIu64)
856 # define printnum_ptr(tcp, addr) \
857 printnum_addr_int64((tcp), (addr))
858 #else /* current_wordsize == 4 */
859 # define printnum_slong(tcp, addr) \
860 printnum_int((tcp), (addr), "%d")
861 # define printnum_ulong(tcp, addr) \
862 printnum_int((tcp), (addr), "%u")
863 # define printnum_ptr(tcp, addr) \
864 printnum_addr_int((tcp), (addr))
867 #ifndef current_klongsize
868 extern bool printnum_addr_klong_int(struct tcb *, kernel_ulong_t addr);
869 # define printnum_kptr(tcp, addr) \
870 printnum_addr_klong_int((tcp), (addr))
871 #elif current_klongsize > 4
872 # define printnum_kptr(tcp, addr) \
873 printnum_addr_int64((tcp), (addr))
874 #else /* current_klongsize == 4 */
875 # define printnum_kptr(tcp, addr) \
876 printnum_addr_int((tcp), (addr))
879 #define DECL_PRINTPAIR(name) \
881 printpair_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
882 ATTRIBUTE_FORMAT((printf, 3, 0))
884 DECL_PRINTPAIR(int64);
885 #undef DECL_PRINTPAIR
887 static inline kernel_long_t
888 truncate_klong_to_current_wordsize(const kernel_long_t v)
890 #if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
891 if (current_wordsize < sizeof(v)) {
900 static inline kernel_ulong_t
901 truncate_kulong_to_current_wordsize(const kernel_ulong_t v)
903 #if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
904 if (current_wordsize < sizeof(v)) {
905 return (unsigned int) v;
914 * Cast a pointer or a pointer-sized integer to kernel_ulong_t.
916 #define ptr_to_kulong(v) ((kernel_ulong_t) (unsigned long) (v))
919 * Zero-extend a signed integer type to unsigned long long.
921 #define zero_extend_signed_to_ull(v) \
922 (sizeof(v) == sizeof(char) ? (unsigned long long) (unsigned char) (v) : \
923 sizeof(v) == sizeof(short) ? (unsigned long long) (unsigned short) (v) : \
924 sizeof(v) == sizeof(int) ? (unsigned long long) (unsigned int) (v) : \
925 sizeof(v) == sizeof(long) ? (unsigned long long) (unsigned long) (v) : \
926 (unsigned long long) (v))
929 * Sign-extend an unsigned integer type to long long.
931 #define sign_extend_unsigned_to_ll(v) \
932 (sizeof(v) == sizeof(char) ? (long long) (char) (v) : \
933 sizeof(v) == sizeof(short) ? (long long) (short) (v) : \
934 sizeof(v) == sizeof(int) ? (long long) (int) (v) : \
935 sizeof(v) == sizeof(long) ? (long long) (long) (v) : \
938 extern const struct_sysent sysent0[];
939 extern const char *const errnoent0[];
940 extern const char *const signalent0[];
941 extern const struct_ioctlent ioctlent0[];
943 #if SUPPORTED_PERSONALITIES > 1
944 extern const struct_sysent *sysent;
945 extern const char *const *errnoent;
946 extern const char *const *signalent;
947 extern const struct_ioctlent *ioctlent;
949 # define sysent sysent0
950 # define errnoent errnoent0
951 # define signalent signalent0
952 # define ioctlent ioctlent0
955 extern unsigned nsyscalls;
956 extern unsigned nerrnos;
957 extern unsigned nsignals;
958 extern unsigned nioctlents;
960 extern const unsigned int nsyscall_vec[SUPPORTED_PERSONALITIES];
961 extern const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES];
962 extern struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
964 #ifdef IN_MPERS_BOOTSTRAP
965 /* Transform multi-line MPERS_PRINTER_DECL statements to one-liners. */
966 # define MPERS_PRINTER_DECL(type, name, ...) MPERS_PRINTER_DECL(type, name, __VA_ARGS__)
967 #else /* !IN_MPERS_BOOTSTRAP */
968 # if SUPPORTED_PERSONALITIES > 1
969 # include "printers.h"
971 # include "native_printer_decls.h"
973 # define MPERS_PRINTER_DECL(type, name, ...) type MPERS_FUNC_NAME(name)(__VA_ARGS__)
974 #endif /* !IN_MPERS_BOOTSTRAP */
976 /* Checks that sysent[scno] is not out of range. */
978 scno_in_range(kernel_ulong_t scno)
980 return scno < nsyscalls;
984 * Checks whether scno is not out of range,
985 * its corresponding sysent[scno].sys_func is non-NULL,
986 * and its sysent[scno].sys_flags has no TRACE_INDIRECT_SUBCALL flag set.
989 scno_is_valid(kernel_ulong_t scno)
991 return scno_in_range(scno)
992 && sysent[scno].sys_func
993 && !(sysent[scno].sys_flags & TRACE_INDIRECT_SUBCALL);
996 #define MPERS_FUNC_NAME__(prefix, name) prefix ## name
997 #define MPERS_FUNC_NAME_(prefix, name) MPERS_FUNC_NAME__(prefix, name)
998 #define MPERS_FUNC_NAME(name) MPERS_FUNC_NAME_(MPERS_PREFIX, name)
1000 #define SYS_FUNC_NAME(syscall_name) MPERS_FUNC_NAME(syscall_name)
1002 #define SYS_FUNC(syscall_name) int SYS_FUNC_NAME(sys_ ## syscall_name)(struct tcb *tcp)
1004 #if SIZEOF_KERNEL_LONG_T > SIZEOF_LONG
1005 # define PRI_kl "ll"
1010 #define PRI_kld PRI_kl"d"
1011 #define PRI_klu PRI_kl"u"
1012 #define PRI_klx PRI_kl"x"
1015 * The kernel used to define 64-bit types on 64-bit systems on a per-arch
1016 * basis. Some architectures would use unsigned long and others would use
1017 * unsigned long long. These types were exported as part of the
1018 * kernel-userspace ABI and now must be maintained forever. This matches
1019 * what the kernel exports for each architecture so we don't need to cast
1020 * every printing of __u64 or __s64 to stdint types.
1022 #if SIZEOF_LONG == 4
1023 # define PRI__64 "ll"
1024 #elif defined ALPHA || defined IA64 || defined MIPS || defined POWERPC
1025 # define PRI__64 "l"
1027 # define PRI__64 "ll"
1030 #define PRI__d64 PRI__64"d"
1031 #define PRI__u64 PRI__64"u"
1032 #define PRI__x64 PRI__64"x"
1034 #endif /* !STRACE_DEFS_H */