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 "error_prints.h"
57 #include "gcc_compat.h"
58 #include "kernel_types.h"
60 #include "mpers_type.h"
61 #include "string_to_uint.h"
62 #include "supported_personalities.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);
80 # define MAX(a, b) (((a) > (b)) ? (a) : (b))
83 # define MIN(a, b) (((a) < (b)) ? (a) : (b))
85 #define CLAMP(val, min, max) MIN(MAX(min, val), max)
87 /* Glibc has an efficient macro for sigemptyset
88 * (it just does one or two assignments of 0 to internal vector of longs).
90 #if defined(__GLIBC__) && defined(__sigemptyset) && !defined(sigemptyset)
91 # define sigemptyset __sigemptyset
94 /* Configuration section */
95 #ifndef DEFAULT_STRLEN
96 /* default maximum # of bytes printed in `printstr', change with -s switch */
97 # define DEFAULT_STRLEN 32
99 #ifndef DEFAULT_ACOLUMN
100 # define DEFAULT_ACOLUMN 40 /* default alignment column for results */
103 * Maximum number of args to a syscall.
105 * Make sure that all entries in all syscallent.h files have nargs <= MAX_ARGS!
106 * linux/<ARCH>/syscallent*.h:
107 * all have nargs <= 6 except mips o32 which has nargs <= 7.
110 # ifdef LINUX_MIPSO32
116 /* default sorting method for call profiling */
117 #ifndef DEFAULT_SORTBY
118 # define DEFAULT_SORTBY "time"
121 * Experimental code using PTRACE_SEIZE can be enabled here.
122 * This needs Linux kernel 3.4.x or later to work.
125 /* To force NOMMU build, set to 1 */
126 #define NOMMU_SYSTEM 0
129 # define ERESTARTSYS 512
131 #ifndef ERESTARTNOINTR
132 # define ERESTARTNOINTR 513
134 #ifndef ERESTARTNOHAND
135 # define ERESTARTNOHAND 514
137 #ifndef ERESTART_RESTARTBLOCK
138 # define ERESTART_RESTARTBLOCK 516
141 #define PERSONALITY0_WORDSIZE SIZEOF_LONG
142 #define PERSONALITY0_KLONGSIZE SIZEOF_KERNEL_LONG_T
143 #define PERSONALITY0_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
144 #define PERSONALITY0_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
146 #if SUPPORTED_PERSONALITIES > 1
147 # define PERSONALITY1_WORDSIZE 4
148 # define PERSONALITY1_KLONGSIZE PERSONALITY1_WORDSIZE
151 #if SUPPORTED_PERSONALITIES > 2
152 # define PERSONALITY2_WORDSIZE 4
153 # define PERSONALITY2_KLONGSIZE PERSONALITY0_KLONGSIZE
156 #if SUPPORTED_PERSONALITIES > 1 && defined HAVE_M32_MPERS
157 # define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
158 # define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
159 # define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
160 # define MPERS_m32_IOCTL_MACROS "ioctl_redefs1.h"
162 # define PERSONALITY1_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
163 # define PERSONALITY1_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
164 # define PERSONALITY1_INCLUDE_FUNCS "empty.h"
167 #if SUPPORTED_PERSONALITIES > 2 && defined HAVE_MX32_MPERS
168 # define PERSONALITY2_INCLUDE_FUNCS "mx32_funcs.h"
169 # define PERSONALITY2_INCLUDE_PRINTERS_DECLS "mx32_printer_decls.h"
170 # define PERSONALITY2_INCLUDE_PRINTERS_DEFS "mx32_printer_defs.h"
171 # define MPERS_mx32_IOCTL_MACROS "ioctl_redefs2.h"
173 # define PERSONALITY2_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
174 # define PERSONALITY2_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
175 # define PERSONALITY2_INCLUDE_FUNCS "empty.h"
178 typedef struct ioctlent {
183 #define INJECT_F_SIGNAL 1
184 #define INJECT_F_RETVAL 2
195 struct inject_data data;
198 #define MAX_ERRNO_VALUE 4095
200 /* Trace Control Block */
202 int flags; /* See below for TCB_ values */
203 int pid; /* If 0, this tcb is free */
204 int qual_flg; /* qual_flags[scno] or DEFAULT_QUAL_FLAGS + RAW */
205 unsigned long u_error; /* Error code */
206 kernel_ulong_t scno; /* System call number */
207 kernel_ulong_t u_arg[MAX_ARGS]; /* System call arguments */
208 kernel_long_t u_rval; /* Return value */
209 #if SUPPORTED_PERSONALITIES > 1
210 unsigned int currpers; /* Personality at the time of scno update */
212 int sys_func_rval; /* Syscall entry parser's return value */
213 int curcol; /* Output column for this process */
214 FILE *outf; /* Output file for this process */
215 const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
216 void *_priv_data; /* Private data for syscall decoding functions */
217 void (*_free_priv_data)(void *); /* Callback for freeing priv_data */
218 const struct_sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */
219 const struct_sysent *s_prev_ent; /* for "resuming interrupted SYSCALL" msg */
220 struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
221 struct timeval stime; /* System time usage as of last process wait */
222 struct timeval dtime; /* Delta for system time usage */
223 struct timeval etime; /* Syscall entry time */
226 struct UPT_info *libunwind_ui;
227 struct mmap_cache_t *mmap_cache;
228 unsigned int mmap_cache_size;
229 unsigned int mmap_cache_generation;
230 struct queue_t *queue;
235 /* We have attached to this process, but did not see it stopping yet */
236 #define TCB_STARTUP 0x01
237 #define TCB_IGNORE_ONE_SIGSTOP 0x02 /* Next SIGSTOP is to be ignored */
239 * Are we in system call entry or in syscall exit?
241 * This bit is set in syscall_entering_finish() and cleared in
242 * syscall_exiting_finish().
243 * Other stops which are possible directly after syscall entry (death, ptrace
244 * event stop) are handled without calling syscall_{entering,exiting}_*().
246 * Use entering(tcp) / exiting(tcp) to check this bit to make code more
249 #define TCB_INSYSCALL 0x04
250 #define TCB_ATTACHED 0x08 /* We attached to it already */
251 #define TCB_REPRINT 0x10 /* We should reprint this syscall on exit */
252 #define TCB_FILTERED 0x20 /* This system call has been filtered out */
253 #define TCB_TAMPERED 0x40 /* A syscall has been tampered with */
254 #define TCB_HIDE_LOG 0x80 /* We should hide everything (until execve) */
255 #define TCB_SKIP_DETACH_ON_FIRST_EXEC 0x100 /* -b execve should skip detach on first execve */
257 /* qualifier flags */
258 #define QUAL_TRACE 0x001 /* this system call should be traced */
259 #define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */
260 #define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */
261 #define QUAL_RAW 0x008 /* print all args in hex for this syscall */
262 #define QUAL_INJECT 0x010 /* tamper with this system call on purpose */
264 #define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE)
266 #define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL))
267 #define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL)
268 #define syserror(tcp) ((tcp)->u_error != 0)
269 #define traced(tcp) ((tcp)->qual_flg & QUAL_TRACE)
270 #define verbose(tcp) ((tcp)->qual_flg & QUAL_VERBOSE)
271 #define abbrev(tcp) ((tcp)->qual_flg & QUAL_ABBREV)
272 #define raw(tcp) ((tcp)->qual_flg & QUAL_RAW)
273 #define inject(tcp) ((tcp)->qual_flg & QUAL_INJECT)
274 #define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
275 #define hide_log(tcp) ((tcp)->flags & TCB_HIDE_LOG)
279 extern const struct xlat addrfams[];
280 extern const struct xlat arp_hardware_types[];
281 extern const struct xlat at_flags[];
282 extern const struct xlat clocknames[];
283 extern const struct xlat dirent_types[];
284 extern const struct xlat ethernet_protocols[];
285 extern const struct xlat evdev_abs[];
286 extern const struct xlat iffflags[];
287 extern const struct xlat inet_protocols[];
288 extern const struct xlat ip_type_of_services[];
289 extern const struct xlat msg_flags[];
290 extern const struct xlat netlink_protocols[];
291 extern const struct xlat nl_route_types[];
292 extern const struct xlat open_access_modes[];
293 extern const struct xlat open_mode_flags[];
294 extern const struct xlat resource_flags[];
295 extern const struct xlat routing_scopes[];
296 extern const struct xlat routing_table_ids[];
297 extern const struct xlat routing_types[];
298 extern const struct xlat setns_types[];
299 extern const struct xlat sg_io_info[];
300 extern const struct xlat socketlayers[];
301 extern const struct xlat socktypes[];
302 extern const struct xlat tcp_state_flags[];
303 extern const struct xlat tcp_states[];
304 extern const struct xlat whence_codes[];
306 /* Format of syscall return values */
307 #define RVAL_DECIMAL 000 /* decimal format */
308 #define RVAL_HEX 001 /* hex format */
309 #define RVAL_OCTAL 002 /* octal format */
310 #define RVAL_UDECIMAL 003 /* unsigned decimal format */
311 #define RVAL_FD 010 /* file descriptor */
312 #define RVAL_MASK 013 /* mask for these values */
314 #define RVAL_STR 020 /* Print `auxstr' field after return val */
315 #define RVAL_NONE 040 /* Print nothing */
317 #define RVAL_DECODED 0100 /* syscall decoding finished */
318 #define RVAL_IOCTL_DECODED 0200 /* ioctl sub-parser successfully decoded
321 #define IOCTL_NUMBER_UNKNOWN 0
322 #define IOCTL_NUMBER_HANDLED 1
323 #define IOCTL_NUMBER_STOP_LOOKUP 010
325 #define indirect_ipccall(tcp) (tcp->s_ent->sys_flags & TRACE_INDIRECT_SUBCALL)
327 #if defined(ARM) || defined(AARCH64) \
328 || defined(I386) || defined(X32) || defined(X86_64) \
332 || defined(MICROBLAZE) \
335 || defined(SH) || defined(SH64) \
336 || defined(SPARC) || defined(SPARC64) \
338 # define NEED_UID16_PARSERS 1
340 # define NEED_UID16_PARSERS 0
352 extern enum sock_proto get_proto_by_name(const char *);
365 extern cflag_t cflag;
366 extern bool debug_flag;
369 extern bool count_wallclock;
370 extern unsigned int qflag;
371 extern bool not_failing_only;
372 extern unsigned int show_fd_path;
373 /* are we filtering traces based on paths? */
374 extern struct path_set {
375 const char **paths_selected;
376 unsigned int num_selected;
378 #define tracing_paths (global_path_set.num_selected != 0)
379 extern unsigned xflag;
380 extern unsigned followfork;
382 /* if this is true do the stack trace for every system call */
383 extern bool stack_trace_enabled;
385 extern unsigned ptrace_setoptions;
386 extern unsigned max_strlen;
387 extern unsigned os_release;
388 #undef KERNEL_VERSION
389 #define KERNEL_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
391 extern int read_int_from_file(const char *, int *);
393 extern void set_sortby(const char *);
394 extern void set_overhead(int);
395 extern void print_pc(struct tcb *);
397 extern int syscall_entering_decode(struct tcb *);
398 extern int syscall_entering_trace(struct tcb *, unsigned int *);
399 extern void syscall_entering_finish(struct tcb *, int);
401 extern int syscall_exiting_decode(struct tcb *, struct timeval *);
402 extern int syscall_exiting_trace(struct tcb *, struct timeval, int);
403 extern void syscall_exiting_finish(struct tcb *);
405 extern void count_syscall(struct tcb *, const struct timeval *);
406 extern void call_summary(FILE *);
408 extern void clear_regs(void);
409 extern int get_scno(struct tcb *);
410 extern kernel_ulong_t get_rt_sigframe_addr(struct tcb *);
413 * Convert syscall number to syscall name.
415 * @param scno Syscall number.
416 * @return String literal corresponding to the syscall number in case latter
417 * is valid; NULL otherwise.
419 extern const char *syscall_name(kernel_ulong_t scno);
420 extern const char *err_name(unsigned long err);
422 extern bool is_erestart(struct tcb *);
423 extern void temporarily_clear_syserror(struct tcb *);
424 extern void restore_cleared_syserror(struct tcb *);
426 extern void *get_tcb_priv_data(const struct tcb *);
427 extern int set_tcb_priv_data(struct tcb *, void *priv_data,
428 void (*free_priv_data)(void *));
429 extern void free_tcb_priv_data(struct tcb *);
431 static inline unsigned long get_tcb_priv_ulong(const struct tcb *tcp)
433 return (unsigned long) get_tcb_priv_data(tcp);
436 static inline int set_tcb_priv_ulong(struct tcb *tcp, unsigned long val)
438 return set_tcb_priv_data(tcp, (void *) val, 0);
442 umoven(struct tcb *, kernel_ulong_t addr, unsigned int len, void *laddr);
443 #define umove(pid, addr, objp) \
444 umoven((pid), (addr), sizeof(*(objp)), (void *) (objp))
447 umoven_or_printaddr(struct tcb *, kernel_ulong_t addr,
448 unsigned int len, void *laddr);
449 #define umove_or_printaddr(pid, addr, objp) \
450 umoven_or_printaddr((pid), (addr), sizeof(*(objp)), (void *) (objp))
453 umoven_or_printaddr_ignore_syserror(struct tcb *, kernel_ulong_t addr,
454 unsigned int len, void *laddr);
457 umovestr(struct tcb *, kernel_ulong_t addr, unsigned int len, char *laddr);
459 extern int upeek(int pid, unsigned long, kernel_ulong_t *);
460 extern int upoke(int pid, unsigned long, kernel_ulong_t);
463 print_array(struct tcb *,
464 kernel_ulong_t start_addr,
468 int (*umoven_func)(struct tcb *,
472 bool (*print_func)(struct tcb *,
478 #if defined ALPHA || defined IA64 || defined MIPS \
479 || defined SH || defined SPARC || defined SPARC64
480 # define HAVE_GETRVAL2
481 extern long getrval2(struct tcb *);
483 # undef HAVE_GETRVAL2
486 extern const char *signame(const int);
487 extern void pathtrace_select_set(const char *, struct path_set *);
488 extern bool pathtrace_match_set(struct tcb *, struct path_set *);
489 #define pathtrace_select(tcp) \
490 pathtrace_select_set(tcp, &global_path_set)
491 #define pathtrace_match(tcp) \
492 pathtrace_match_set(tcp, &global_path_set)
493 extern int getfdpath(struct tcb *, int, char *, unsigned);
494 extern unsigned long getfdinode(struct tcb *, int);
495 extern enum sock_proto getfdproto(struct tcb *, int);
497 extern const char *xlookup(const struct xlat *, const uint64_t);
498 extern const char *xlat_search(const struct xlat *, const size_t, const uint64_t);
501 struct dyxlat *dyxlat_alloc(size_t nmemb);
502 void dyxlat_free(struct dyxlat *);
503 const struct xlat *dyxlat_get(const struct dyxlat *);
504 void dyxlat_add_pair(struct dyxlat *, uint64_t val, const char *str, size_t len);
506 const struct xlat *genl_families_xlat(void);
508 extern unsigned long get_pagesize(void);
509 extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
512 * Returns STR if it does not start with PREFIX,
513 * or a pointer to the first char in STR after PREFIX.
514 * The length of PREFIX is specified by PREFIX_LEN.
516 static inline const char *
517 str_strip_prefix_len(const char *str, const char *prefix, size_t prefix_len)
519 return strncmp(str, prefix, prefix_len) ? str : str + prefix_len;
522 #define STR_STRIP_PREFIX(str, prefix) \
523 str_strip_prefix_len((str), (prefix), sizeof(prefix) - 1)
525 #define QUOTE_0_TERMINATED 0x01
526 #define QUOTE_OMIT_LEADING_TRAILING_QUOTES 0x02
527 #define QUOTE_OMIT_TRAILING_0 0x08
528 #define QUOTE_FORCE_HEX 0x10
530 extern int string_quote(const char *, char *, unsigned int, unsigned int);
531 extern int print_quoted_string(const char *, unsigned int, unsigned int);
532 extern int print_quoted_cstring(const char *, unsigned int);
534 /* a refers to the lower numbered u_arg,
535 * b refers to the higher numbered u_arg
537 #ifdef WORDS_BIGENDIAN
538 # define ULONG_LONG(a, b) \
539 ((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<32))
541 # define ULONG_LONG(a, b) \
542 ((unsigned long long)(unsigned)(a) | ((unsigned long long)(b)<<32))
544 extern int getllval(struct tcb *, unsigned long long *, int);
545 extern int printllval(struct tcb *, const char *, int)
546 ATTRIBUTE_FORMAT((printf, 2, 0));
548 extern void printaddr(kernel_ulong_t addr);
549 extern int printxvals(const uint64_t, const char *, const struct xlat *, ...)
551 extern int printxval_searchn(const struct xlat *xlat, size_t xlat_size,
552 uint64_t val, const char *dflt);
553 #define printxval_search(xlat__, val__, dflt__) \
554 printxval_searchn(xlat__, ARRAY_SIZE(xlat__), val__, dflt__)
555 extern int printargs(struct tcb *);
556 extern int printargs_u(struct tcb *);
557 extern int printargs_d(struct tcb *);
559 extern void addflags(const struct xlat *, uint64_t);
560 extern int printflags_ex(uint64_t, const char *, const struct xlat *, ...)
562 extern const char *sprintflags(const char *, const struct xlat *, uint64_t);
563 extern const char *sprinttime(long long sec);
564 extern const char *sprinttime_nsec(long long sec, unsigned long long nsec);
565 extern const char *sprinttime_usec(long long sec, unsigned long long usec);
566 extern void print_symbolic_mode_t(unsigned int);
567 extern void print_numeric_umode_t(unsigned short);
568 extern void print_numeric_long_umask(unsigned long);
569 extern void print_dev_t(unsigned long long dev);
570 extern void print_abnormal_hi(kernel_ulong_t);
573 dumpiov_in_msghdr(struct tcb *, kernel_ulong_t addr, kernel_ulong_t data_size);
576 dumpiov_in_mmsghdr(struct tcb *, kernel_ulong_t addr);
579 dumpiov_upto(struct tcb *, int len, kernel_ulong_t addr, kernel_ulong_t data_size);
582 dumpstr(struct tcb *, kernel_ulong_t addr, int len);
585 printstr_ex(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len,
586 unsigned int user_style);
589 printpathn(struct tcb *, kernel_ulong_t addr, unsigned int n);
592 printpath(struct tcb *, kernel_ulong_t addr);
594 #define TIMESPEC_TEXT_BUFSIZE \
595 (sizeof(long long) * 3 * 2 + sizeof("{tv_sec=-, tv_nsec=}"))
596 extern void printfd(struct tcb *, int);
597 extern void print_sockaddr(const void *sa, int len);
599 print_inet_addr(int af, const void *addr, unsigned int len, const char *var_name);
601 decode_inet_addr(struct tcb *, kernel_ulong_t addr,
602 unsigned int len, int family, const char *var_name);
603 extern const char *get_sockaddr_by_inode(struct tcb *, int fd, unsigned long inode);
604 extern bool print_sockaddr_by_inode(struct tcb *, int fd, unsigned long inode);
605 extern void print_dirfd(struct tcb *, int);
608 decode_sockaddr(struct tcb *, kernel_ulong_t addr, int addrlen);
610 extern void printuid(const char *, const unsigned int);
613 print_sigset_addr_len(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len);
615 print_sigset_addr(struct tcb *, kernel_ulong_t addr);
617 extern const char *sprintsigmask_n(const char *, const void *, unsigned int);
618 #define tprintsigmask_addr(prefix, mask) \
619 tprints(sprintsigmask_n((prefix), (mask), sizeof(mask)))
620 extern void printsignal(int);
623 tprint_iov_upto(struct tcb *, kernel_ulong_t len, kernel_ulong_t addr,
624 enum iov_decode, kernel_ulong_t data_size);
627 decode_netlink(struct tcb *, int fd, kernel_ulong_t addr, kernel_ulong_t len);
629 extern void tprint_open_modes(unsigned int);
630 extern const char *sprint_open_modes(unsigned int);
633 decode_seccomp_fprog(struct tcb *, kernel_ulong_t addr);
636 print_seccomp_fprog(struct tcb *, kernel_ulong_t addr, unsigned short len);
639 decode_sock_fprog(struct tcb *, kernel_ulong_t addr);
642 print_sock_fprog(struct tcb *, kernel_ulong_t addr, unsigned short len);
645 extern void print_struct_stat(struct tcb *, const struct strace_stat *const st);
647 struct strace_statfs;
648 struct strace_keyctl_kdf_params;
651 print_struct_statfs(struct tcb *, kernel_ulong_t addr);
654 print_struct_statfs64(struct tcb *, kernel_ulong_t addr, kernel_ulong_t size);
656 extern void print_ifindex(unsigned int);
658 extern void qualify(const char *);
659 extern unsigned int qual_flags(const unsigned int);
661 #define DECL_IOCTL(name) \
663 name ## _ioctl(struct tcb *, unsigned int request, kernel_ulong_t arg) \
664 /* End of DECL_IOCTL definition. */
677 extern int decode_sg_io_v4(struct tcb *, const kernel_ulong_t arg);
681 typedef bool (*netlink_decoder_t)(struct tcb *, const struct nlmsghdr *,
682 kernel_ulong_t addr, unsigned int len);
684 #define DECL_NETLINK(name) \
686 decode_netlink_ ## name(struct tcb *, const struct nlmsghdr *, \
687 kernel_ulong_t addr, unsigned int len) \
688 /* End of DECL_NETLINK definition. */
690 DECL_NETLINK(crypto);
692 DECL_NETLINK(selinux);
693 DECL_NETLINK(sock_diag);
695 extern int tv_nz(const struct timeval *);
696 extern int tv_cmp(const struct timeval *, const struct timeval *);
697 extern double tv_float(const struct timeval *);
698 extern void tv_add(struct timeval *, const struct timeval *, const struct timeval *);
699 extern void tv_sub(struct timeval *, const struct timeval *, const struct timeval *);
700 extern void tv_mul(struct timeval *, const struct timeval *, int);
701 extern void tv_div(struct timeval *, const struct timeval *, int);
704 extern void unwind_init(void);
705 extern void unwind_tcb_init(struct tcb *);
706 extern void unwind_tcb_fin(struct tcb *);
707 extern void unwind_cache_invalidate(struct tcb *);
708 extern void unwind_print_stacktrace(struct tcb *);
709 extern void unwind_capture_stacktrace(struct tcb *);
713 printstrn(struct tcb *tcp, kernel_ulong_t addr, kernel_ulong_t len)
715 printstr_ex(tcp, addr, len, 0);
719 printstr(struct tcb *tcp, kernel_ulong_t addr)
721 printstr_ex(tcp, addr, -1, QUOTE_0_TERMINATED);
725 printflags64(const struct xlat *x, uint64_t flags, const char *dflt)
727 return printflags_ex(flags, dflt, x, NULL);
731 printflags(const struct xlat *x, unsigned int flags, const char *dflt)
733 return printflags64(x, flags, dflt);
737 printxval64(const struct xlat *x, const uint64_t val, const char *dflt)
739 return printxvals(val, dflt, x, NULL);
743 printxval(const struct xlat *x, const unsigned int val, const char *dflt)
745 return printxvals(val, dflt, x, NULL);
749 tprint_iov(struct tcb *tcp, kernel_ulong_t len, kernel_ulong_t addr,
750 enum iov_decode decode_iov)
752 tprint_iov_upto(tcp, len, addr, decode_iov, -1);
760 extern void print_timeval32_t(const timeval32_t *);
761 extern void printrusage32(struct tcb *, kernel_ulong_t);
762 extern const char *sprint_timeval32(struct tcb *, kernel_ulong_t addr);
763 extern void print_timeval32(struct tcb *, kernel_ulong_t addr);
764 extern void print_timeval32_utimes(struct tcb *, kernel_ulong_t addr);
765 extern void print_itimerval32(struct tcb *, kernel_ulong_t addr);
768 #ifdef HAVE_STRUCT_USER_DESC
769 extern void print_user_desc(struct tcb *, kernel_ulong_t addr);
772 /* Strace log generation machinery.
774 * printing_tcp: tcb which has incomplete line being printed right now.
775 * NULL if last line has been completed ('\n'-terminated).
776 * printleader(tcp) examines it, finishes incomplete line if needed,
777 * the sets it to tcp.
778 * line_ended() clears printing_tcp and resets ->curcol = 0.
779 * tcp->curcol == 0 check is also used to detect completeness
780 * of last line, since in -ff mode just checking printing_tcp for NULL
783 * If you change this code, test log generation in both -f and -ff modes
785 * strace -oLOG -f[f] test/threaded_execve
786 * strace -oLOG -f[f] test/sigkill_rain
787 * strace -oLOG -f[f] -p "`pidof web_browser`"
789 extern struct tcb *printing_tcp;
790 extern void printleader(struct tcb *);
791 extern void line_ended(void);
792 extern void tabto(void);
793 extern void tprintf(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
794 extern void tprints(const char *str);
795 extern void tprintf_comment(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
796 extern void tprints_comment(const char *str);
798 #if SUPPORTED_PERSONALITIES > 1
799 extern void set_personality(int personality);
800 extern unsigned current_personality;
802 # define set_personality(personality) ((void)0)
803 # define current_personality 0
806 #if SUPPORTED_PERSONALITIES == 1
807 # define current_wordsize PERSONALITY0_WORDSIZE
808 # define current_klongsize PERSONALITY0_KLONGSIZE
810 # if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE
811 # define current_wordsize PERSONALITY0_WORDSIZE
813 extern unsigned current_wordsize;
815 # if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_KLONGSIZE == PERSONALITY1_KLONGSIZE
816 # define current_klongsize PERSONALITY0_KLONGSIZE
818 extern unsigned current_klongsize;
822 #define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG \
823 (SIZEOF_KERNEL_LONG_T > 4 \
824 && (SIZEOF_LONG < SIZEOF_KERNEL_LONG_T || !defined(current_wordsize)))
826 #define DECL_PRINTNUM(name) \
828 printnum_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
829 ATTRIBUTE_FORMAT((printf, 3, 0)) \
830 /* End of DECL_PRINTNUM definition. */
832 DECL_PRINTNUM(short);
834 DECL_PRINTNUM(int64);
837 #define DECL_PRINTNUM_ADDR(name) \
839 printnum_addr_ ## name(struct tcb *, kernel_ulong_t addr) \
840 /* End of DECL_PRINTNUM_ADDR definition. */
842 DECL_PRINTNUM_ADDR(int);
843 DECL_PRINTNUM_ADDR(int64);
844 #undef DECL_PRINTNUM_ADDR
846 #ifndef current_wordsize
848 printnum_long_int(struct tcb *, kernel_ulong_t addr,
849 const char *fmt_long, const char *fmt_int)
850 ATTRIBUTE_FORMAT((printf, 3, 0))
851 ATTRIBUTE_FORMAT((printf, 4, 0));
852 extern bool printnum_addr_long_int(struct tcb *, kernel_ulong_t addr);
853 # define printnum_slong(tcp, addr) \
854 printnum_long_int((tcp), (addr), "%" PRId64, "%d")
855 # define printnum_ulong(tcp, addr) \
856 printnum_long_int((tcp), (addr), "%" PRIu64, "%u")
857 # define printnum_ptr(tcp, addr) \
858 printnum_addr_long_int((tcp), (addr))
859 #elif current_wordsize > 4
860 # define printnum_slong(tcp, addr) \
861 printnum_int64((tcp), (addr), "%" PRId64)
862 # define printnum_ulong(tcp, addr) \
863 printnum_int64((tcp), (addr), "%" PRIu64)
864 # define printnum_ptr(tcp, addr) \
865 printnum_addr_int64((tcp), (addr))
866 #else /* current_wordsize == 4 */
867 # define printnum_slong(tcp, addr) \
868 printnum_int((tcp), (addr), "%d")
869 # define printnum_ulong(tcp, addr) \
870 printnum_int((tcp), (addr), "%u")
871 # define printnum_ptr(tcp, addr) \
872 printnum_addr_int((tcp), (addr))
875 #ifndef current_klongsize
876 extern bool printnum_addr_klong_int(struct tcb *, kernel_ulong_t addr);
877 # define printnum_kptr(tcp, addr) \
878 printnum_addr_klong_int((tcp), (addr))
879 #elif current_klongsize > 4
880 # define printnum_kptr(tcp, addr) \
881 printnum_addr_int64((tcp), (addr))
882 #else /* current_klongsize == 4 */
883 # define printnum_kptr(tcp, addr) \
884 printnum_addr_int((tcp), (addr))
887 #define DECL_PRINTPAIR(name) \
889 printpair_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
890 ATTRIBUTE_FORMAT((printf, 3, 0)) \
891 /* End of DECL_PRINTPAIR definition. */
894 DECL_PRINTPAIR(int64);
895 #undef DECL_PRINTPAIR
897 static inline kernel_long_t
898 truncate_klong_to_current_wordsize(const kernel_long_t v)
900 #if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
901 if (current_wordsize < sizeof(v)) {
910 static inline kernel_ulong_t
911 truncate_kulong_to_current_wordsize(const kernel_ulong_t v)
913 #if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
914 if (current_wordsize < sizeof(v)) {
915 return (unsigned int) v;
924 * Cast a pointer or a pointer-sized integer to kernel_ulong_t.
926 #define ptr_to_kulong(v) ((kernel_ulong_t) (unsigned long) (v))
929 * Zero-extend a signed integer type to unsigned long long.
931 #define zero_extend_signed_to_ull(v) \
932 (sizeof(v) == sizeof(char) ? (unsigned long long) (unsigned char) (v) : \
933 sizeof(v) == sizeof(short) ? (unsigned long long) (unsigned short) (v) : \
934 sizeof(v) == sizeof(int) ? (unsigned long long) (unsigned int) (v) : \
935 sizeof(v) == sizeof(long) ? (unsigned long long) (unsigned long) (v) : \
936 (unsigned long long) (v))
939 * Sign-extend an unsigned integer type to long long.
941 #define sign_extend_unsigned_to_ll(v) \
942 (sizeof(v) == sizeof(char) ? (long long) (char) (v) : \
943 sizeof(v) == sizeof(short) ? (long long) (short) (v) : \
944 sizeof(v) == sizeof(int) ? (long long) (int) (v) : \
945 sizeof(v) == sizeof(long) ? (long long) (long) (v) : \
948 extern const struct_sysent sysent0[];
949 extern const char *const errnoent0[];
950 extern const char *const signalent0[];
951 extern const struct_ioctlent ioctlent0[];
953 #if SUPPORTED_PERSONALITIES > 1
954 extern const struct_sysent *sysent;
955 extern const char *const *errnoent;
956 extern const char *const *signalent;
957 extern const struct_ioctlent *ioctlent;
959 # define sysent sysent0
960 # define errnoent errnoent0
961 # define signalent signalent0
962 # define ioctlent ioctlent0
965 extern unsigned nsyscalls;
966 extern unsigned nerrnos;
967 extern unsigned nsignals;
968 extern unsigned nioctlents;
970 extern const unsigned int nsyscall_vec[SUPPORTED_PERSONALITIES];
971 extern const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES];
972 extern struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
974 #ifdef IN_MPERS_BOOTSTRAP
975 /* Transform multi-line MPERS_PRINTER_DECL statements to one-liners. */
976 # define MPERS_PRINTER_DECL(type, name, ...) MPERS_PRINTER_DECL(type, name, __VA_ARGS__)
977 #else /* !IN_MPERS_BOOTSTRAP */
978 # if SUPPORTED_PERSONALITIES > 1
979 # include "printers.h"
981 # include "native_printer_decls.h"
983 # define MPERS_PRINTER_DECL(type, name, ...) type MPERS_FUNC_NAME(name)(__VA_ARGS__)
984 #endif /* !IN_MPERS_BOOTSTRAP */
986 /* Checks that sysent[scno] is not out of range. */
988 scno_in_range(kernel_ulong_t scno)
990 return scno < nsyscalls;
994 * Checks whether scno is not out of range,
995 * its corresponding sysent[scno].sys_func is non-NULL,
996 * and its sysent[scno].sys_flags has no TRACE_INDIRECT_SUBCALL flag set.
999 scno_is_valid(kernel_ulong_t scno)
1001 return scno_in_range(scno)
1002 && sysent[scno].sys_func
1003 && !(sysent[scno].sys_flags & TRACE_INDIRECT_SUBCALL);
1006 #define MPERS_FUNC_NAME__(prefix, name) prefix ## name
1007 #define MPERS_FUNC_NAME_(prefix, name) MPERS_FUNC_NAME__(prefix, name)
1008 #define MPERS_FUNC_NAME(name) MPERS_FUNC_NAME_(MPERS_PREFIX, name)
1010 #define SYS_FUNC_NAME(syscall_name) MPERS_FUNC_NAME(syscall_name)
1012 #define SYS_FUNC(syscall_name) int SYS_FUNC_NAME(sys_ ## syscall_name)(struct tcb *tcp)
1014 #endif /* !STRACE_DEFS_H */