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"
65 const char *strerror(int);
68 /* Some libc have stpcpy, some don't. Sigh...
69 * Roll our private implementation...
72 #define stpcpy strace_stpcpy
73 extern char *stpcpy(char *dst, const char *src);
78 # define MAX(a, b) (((a) > (b)) ? (a) : (b))
81 # define MIN(a, b) (((a) < (b)) ? (a) : (b))
83 #define CLAMP(val, min, max) MIN(MAX(min, val), max)
85 /* Glibc has an efficient macro for sigemptyset
86 * (it just does one or two assignments of 0 to internal vector of longs).
88 #if defined(__GLIBC__) && defined(__sigemptyset) && !defined(sigemptyset)
89 # define sigemptyset __sigemptyset
92 /* Configuration section */
93 #ifndef DEFAULT_STRLEN
94 /* default maximum # of bytes printed in `printstr', change with -s switch */
95 # define DEFAULT_STRLEN 32
97 #ifndef DEFAULT_ACOLUMN
98 # define DEFAULT_ACOLUMN 40 /* default alignment column for results */
101 * Maximum number of args to a syscall.
103 * Make sure that all entries in all syscallent.h files have nargs <= MAX_ARGS!
104 * linux/<ARCH>/syscallent*.h:
105 * all have nargs <= 6 except mips o32 which has nargs <= 7.
108 # ifdef LINUX_MIPSO32
114 /* default sorting method for call profiling */
115 #ifndef DEFAULT_SORTBY
116 # define DEFAULT_SORTBY "time"
119 * Experimental code using PTRACE_SEIZE can be enabled here.
120 * This needs Linux kernel 3.4.x or later to work.
123 /* To force NOMMU build, set to 1 */
124 #define NOMMU_SYSTEM 0
127 # define ERESTARTSYS 512
129 #ifndef ERESTARTNOINTR
130 # define ERESTARTNOINTR 513
132 #ifndef ERESTARTNOHAND
133 # define ERESTARTNOHAND 514
135 #ifndef ERESTART_RESTARTBLOCK
136 # define ERESTART_RESTARTBLOCK 516
140 # define SUPPORTED_PERSONALITIES 3
141 # define PERSONALITY2_WORDSIZE 4
142 # define PERSONALITY2_KLONGSIZE PERSONALITY0_KLONGSIZE
143 #elif defined AARCH64 \
144 || defined POWERPC64 \
149 # define SUPPORTED_PERSONALITIES 2
151 # define SUPPORTED_PERSONALITIES 1
154 #if defined TILE && defined __tilepro__
155 # define DEFAULT_PERSONALITY 1
157 # define DEFAULT_PERSONALITY 0
160 #define PERSONALITY0_WORDSIZE SIZEOF_LONG
161 #define PERSONALITY0_KLONGSIZE SIZEOF_KERNEL_LONG_T
162 #define PERSONALITY0_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
163 #define PERSONALITY0_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
165 #if SUPPORTED_PERSONALITIES > 1
166 # define PERSONALITY1_WORDSIZE 4
167 # define PERSONALITY1_KLONGSIZE PERSONALITY1_WORDSIZE
170 #if SUPPORTED_PERSONALITIES > 1 && defined HAVE_M32_MPERS
171 # define PERSONALITY1_INCLUDE_PRINTERS_DECLS "m32_printer_decls.h"
172 # define PERSONALITY1_INCLUDE_PRINTERS_DEFS "m32_printer_defs.h"
173 # define PERSONALITY1_INCLUDE_FUNCS "m32_funcs.h"
174 # define MPERS_m32_IOCTL_MACROS "ioctl_redefs1.h"
176 # define PERSONALITY1_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
177 # define PERSONALITY1_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
178 # define PERSONALITY1_INCLUDE_FUNCS "empty.h"
181 #if SUPPORTED_PERSONALITIES > 2 && defined HAVE_MX32_MPERS
182 # define PERSONALITY2_INCLUDE_FUNCS "mx32_funcs.h"
183 # define PERSONALITY2_INCLUDE_PRINTERS_DECLS "mx32_printer_decls.h"
184 # define PERSONALITY2_INCLUDE_PRINTERS_DEFS "mx32_printer_defs.h"
185 # define MPERS_mx32_IOCTL_MACROS "ioctl_redefs2.h"
187 # define PERSONALITY2_INCLUDE_PRINTERS_DECLS "native_printer_decls.h"
188 # define PERSONALITY2_INCLUDE_PRINTERS_DEFS "native_printer_defs.h"
189 # define PERSONALITY2_INCLUDE_FUNCS "empty.h"
192 typedef struct ioctlent {
204 #define MAX_ERRNO_VALUE 4095
205 #define INJECT_OPTS_RVAL_DEFAULT (-(MAX_ERRNO_VALUE + 1))
207 /* Trace Control Block */
209 int flags; /* See below for TCB_ values */
210 int pid; /* If 0, this tcb is free */
211 int qual_flg; /* qual_flags[scno] or DEFAULT_QUAL_FLAGS + RAW */
212 unsigned long u_error; /* Error code */
213 kernel_ulong_t scno; /* System call number */
214 kernel_ulong_t u_arg[MAX_ARGS]; /* System call arguments */
215 kernel_long_t u_rval; /* Return value */
216 #if SUPPORTED_PERSONALITIES > 1
217 unsigned int currpers; /* Personality at the time of scno update */
219 int sys_func_rval; /* Syscall entry parser's return value */
220 int curcol; /* Output column for this process */
221 FILE *outf; /* Output file for this process */
222 const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
223 void *_priv_data; /* Private data for syscall decoding functions */
224 void (*_free_priv_data)(void *); /* Callback for freeing priv_data */
225 const struct_sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */
226 const struct_sysent *s_prev_ent; /* for "resuming interrupted SYSCALL" msg */
227 struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
228 struct timeval stime; /* System time usage as of last process wait */
229 struct timeval dtime; /* Delta for system time usage */
230 struct timeval etime; /* Syscall entry time */
233 struct UPT_info *libunwind_ui;
234 struct mmap_cache_t *mmap_cache;
235 unsigned int mmap_cache_size;
236 unsigned int mmap_cache_generation;
237 struct queue_t *queue;
242 /* We have attached to this process, but did not see it stopping yet */
243 #define TCB_STARTUP 0x01
244 #define TCB_IGNORE_ONE_SIGSTOP 0x02 /* Next SIGSTOP is to be ignored */
246 * Are we in system call entry or in syscall exit?
248 * This bit is set in syscall_entering_finish() and cleared in
249 * syscall_exiting_finish().
250 * Other stops which are possible directly after syscall entry (death, ptrace
251 * event stop) are handled without calling syscall_{entering,exiting}_*().
253 * Use entering(tcp) / exiting(tcp) to check this bit to make code more
256 #define TCB_INSYSCALL 0x04
257 #define TCB_ATTACHED 0x08 /* We attached to it already */
258 #define TCB_REPRINT 0x10 /* We should reprint this syscall on exit */
259 #define TCB_FILTERED 0x20 /* This system call has been filtered out */
260 #define TCB_TAMPERED 0x40 /* A syscall has been tampered with */
261 #define TCB_HIDE_LOG 0x80 /* We should hide everything (until execve) */
262 #define TCB_SKIP_DETACH_ON_FIRST_EXEC 0x100 /* -b execve should skip detach on first execve */
264 /* qualifier flags */
265 #define QUAL_TRACE 0x001 /* this system call should be traced */
266 #define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */
267 #define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */
268 #define QUAL_RAW 0x008 /* print all args in hex for this syscall */
269 #define QUAL_INJECT 0x010 /* tamper with this system call on purpose */
270 #define QUAL_SIGNAL 0x100 /* report events with this signal */
271 #define QUAL_READ 0x200 /* dump data read from this file descriptor */
272 #define QUAL_WRITE 0x400 /* dump data written to this file descriptor */
274 #define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE)
276 #define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL))
277 #define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL)
278 #define syserror(tcp) ((tcp)->u_error != 0)
279 #define verbose(tcp) ((tcp)->qual_flg & QUAL_VERBOSE)
280 #define abbrev(tcp) ((tcp)->qual_flg & QUAL_ABBREV)
281 #define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
282 #define hide_log(tcp) ((tcp)->flags & TCB_HIDE_LOG)
286 extern const struct xlat addrfams[];
287 extern const struct xlat at_flags[];
288 extern const struct xlat clocknames[];
289 extern const struct xlat dirent_types[];
290 extern const struct xlat ethernet_protocols[];
291 extern const struct xlat evdev_abs[];
292 extern const struct xlat inet_protocols[];
293 extern const struct xlat msg_flags[];
294 extern const struct xlat netlink_protocols[];
295 extern const struct xlat open_access_modes[];
296 extern const struct xlat open_mode_flags[];
297 extern const struct xlat resource_flags[];
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 */
319 #define IOCTL_NUMBER_UNKNOWN 0
320 #define IOCTL_NUMBER_HANDLED 1
321 #define IOCTL_NUMBER_STOP_LOOKUP 010
323 #define indirect_ipccall(tcp) (tcp->s_ent->sys_flags & TRACE_INDIRECT_SUBCALL)
325 #if defined(ARM) || defined(AARCH64) \
326 || defined(I386) || defined(X32) || defined(X86_64) \
330 || defined(MICROBLAZE) \
333 || defined(SH) || defined(SH64) \
334 || defined(SPARC) || defined(SPARC64) \
336 # define NEED_UID16_PARSERS 1
338 # define NEED_UID16_PARSERS 0
350 extern enum sock_proto get_proto_by_name(const char *);
363 extern cflag_t cflag;
364 extern bool debug_flag;
367 extern bool count_wallclock;
368 extern unsigned int qflag;
369 extern bool not_failing_only;
370 extern unsigned int show_fd_path;
371 /* are we filtering traces based on paths? */
372 extern struct path_set {
373 const char **paths_selected;
374 unsigned int num_selected;
376 #define tracing_paths (global_path_set.num_selected != 0)
377 extern unsigned xflag;
378 extern unsigned followfork;
380 /* if this is true do the stack trace for every system call */
381 extern bool stack_trace_enabled;
383 extern unsigned ptrace_setoptions;
384 extern unsigned max_strlen;
385 extern unsigned os_release;
386 #undef KERNEL_VERSION
387 #define KERNEL_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
389 extern int read_int_from_file(const char *, int *);
391 extern void set_sortby(const char *);
392 extern void set_overhead(int);
393 extern void print_pc(struct tcb *);
395 extern int syscall_entering_decode(struct tcb *);
396 extern int syscall_entering_trace(struct tcb *, unsigned int *);
397 extern void syscall_entering_finish(struct tcb *, int);
399 extern int syscall_exiting_decode(struct tcb *, struct timeval *);
400 extern int syscall_exiting_trace(struct tcb *, struct timeval, int);
401 extern void syscall_exiting_finish(struct tcb *);
403 extern void count_syscall(struct tcb *, const struct timeval *);
404 extern void call_summary(FILE *);
406 extern void clear_regs(void);
407 extern int get_scno(struct tcb *);
408 extern kernel_ulong_t get_rt_sigframe_addr(struct tcb *);
411 * Convert syscall number to syscall name.
413 * @param scno Syscall number.
414 * @return String literal corresponding to the syscall number in case latter
415 * is valid; NULL otherwise.
417 extern const char *syscall_name(kernel_ulong_t scno);
418 extern const char *err_name(unsigned long err);
420 extern bool is_erestart(struct tcb *);
421 extern void temporarily_clear_syserror(struct tcb *);
422 extern void restore_cleared_syserror(struct tcb *);
424 extern void *get_tcb_priv_data(const struct tcb *);
425 extern int set_tcb_priv_data(struct tcb *, void *priv_data,
426 void (*free_priv_data)(void *));
427 extern void free_tcb_priv_data(struct tcb *);
429 static inline unsigned long get_tcb_priv_ulong(const struct tcb *tcp)
431 return (unsigned long) get_tcb_priv_data(tcp);
434 static inline int set_tcb_priv_ulong(struct tcb *tcp, unsigned long val)
436 return set_tcb_priv_data(tcp, (void *) val, 0);
440 umoven(struct tcb *, kernel_ulong_t addr, unsigned int len, void *laddr);
441 #define umove(pid, addr, objp) \
442 umoven((pid), (addr), sizeof(*(objp)), (void *) (objp))
445 umoven_or_printaddr(struct tcb *, kernel_ulong_t addr,
446 unsigned int len, void *laddr);
447 #define umove_or_printaddr(pid, addr, objp) \
448 umoven_or_printaddr((pid), (addr), sizeof(*(objp)), (void *) (objp))
451 umoven_or_printaddr_ignore_syserror(struct tcb *, kernel_ulong_t addr,
452 unsigned int len, void *laddr);
455 umovestr(struct tcb *, kernel_ulong_t addr, unsigned int len, char *laddr);
457 extern int upeek(int pid, unsigned long, kernel_ulong_t *);
458 extern int upoke(int pid, unsigned long, kernel_ulong_t);
461 print_array(struct tcb *,
462 kernel_ulong_t start_addr,
466 int (*umoven_func)(struct tcb *,
470 bool (*print_func)(struct tcb *,
476 #if defined ALPHA || defined IA64 || defined MIPS \
477 || defined SH || defined SPARC || defined SPARC64
478 # define HAVE_GETRVAL2
479 extern long getrval2(struct tcb *);
481 # undef HAVE_GETRVAL2
484 extern const char *signame(const int);
485 extern void pathtrace_select_set(const char *, struct path_set *);
486 extern bool pathtrace_match_set(struct tcb *, struct path_set *);
487 #define pathtrace_select(tcp) \
488 pathtrace_select_set(tcp, &global_path_set)
489 #define pathtrace_match(tcp) \
490 pathtrace_match_set(tcp, &global_path_set)
491 extern int getfdpath(struct tcb *, int, char *, unsigned);
492 extern unsigned long getfdinode(struct tcb *, int);
493 extern enum sock_proto getfdproto(struct tcb *, int);
495 extern const char *xlookup(const struct xlat *, const uint64_t);
496 extern const char *xlat_search(const struct xlat *, const size_t, const uint64_t);
499 struct dyxlat *dyxlat_alloc(size_t nmemb);
500 void dyxlat_free(struct dyxlat *);
501 const struct xlat *dyxlat_get(const struct dyxlat *);
502 void dyxlat_add_pair(struct dyxlat *, uint64_t val, const char *str, size_t len);
504 const struct xlat *genl_families_xlat(void);
506 extern unsigned long get_pagesize(void);
508 string_to_uint_ex(const char *str, char **endptr,
509 unsigned int max_val, const char *accepted_ending);
510 extern int string_to_uint(const char *str);
512 string_to_uint_upto(const char *const str, unsigned int max_val)
514 return string_to_uint_ex(str, NULL, max_val, NULL);
516 extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
519 * Returns STR if it does not start with PREFIX,
520 * or a pointer to the first char in STR after PREFIX.
521 * The length of PREFIX is specified by PREFIX_LEN.
523 static inline const char *
524 str_strip_prefix_len(const char *str, const char *prefix, size_t prefix_len)
526 return strncmp(str, prefix, prefix_len) ? str : str + prefix_len;
529 #define STR_STRIP_PREFIX(str, prefix) \
530 str_strip_prefix_len((str), (prefix), sizeof(prefix) - 1)
532 #define QUOTE_0_TERMINATED 0x01
533 #define QUOTE_OMIT_LEADING_TRAILING_QUOTES 0x02
534 #define QUOTE_OMIT_TRAILING_0 0x08
535 #define QUOTE_FORCE_HEX 0x10
537 extern int string_quote(const char *, char *, unsigned int, unsigned int);
538 extern int print_quoted_string(const char *, unsigned int, unsigned int);
539 extern int print_quoted_cstring(const char *, unsigned int);
541 /* a refers to the lower numbered u_arg,
542 * b refers to the higher numbered u_arg
544 #ifdef WORDS_BIGENDIAN
545 # define ULONG_LONG(a, b) \
546 ((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<32))
548 # define ULONG_LONG(a, b) \
549 ((unsigned long long)(unsigned)(a) | ((unsigned long long)(b)<<32))
551 extern int getllval(struct tcb *, unsigned long long *, int);
552 extern int printllval(struct tcb *, const char *, int)
553 ATTRIBUTE_FORMAT((printf, 2, 0));
555 extern void printaddr(kernel_ulong_t addr);
556 extern int printxvals(const uint64_t, const char *, const struct xlat *, ...)
558 extern int printxval_searchn(const struct xlat *xlat, size_t xlat_size,
559 uint64_t val, const char *dflt);
560 #define printxval_search(xlat__, val__, dflt__) \
561 printxval_searchn(xlat__, ARRAY_SIZE(xlat__), val__, dflt__)
562 extern int printargs(struct tcb *);
563 extern int printargs_u(struct tcb *);
564 extern int printargs_d(struct tcb *);
566 extern void addflags(const struct xlat *, uint64_t);
567 extern int printflags_ex(uint64_t, const char *, const struct xlat *, ...)
569 extern const char *sprintflags(const char *, const struct xlat *, uint64_t);
570 extern const char *sprinttime(long long sec);
571 extern const char *sprinttime_nsec(long long sec, unsigned long long nsec);
572 extern const char *sprinttime_usec(long long sec, unsigned long long usec);
573 extern void print_symbolic_mode_t(unsigned int);
574 extern void print_numeric_umode_t(unsigned short);
575 extern void print_numeric_long_umask(unsigned long);
576 extern void print_dev_t(unsigned long long dev);
577 extern void print_abnormal_hi(kernel_ulong_t);
580 dumpiov_in_msghdr(struct tcb *, kernel_ulong_t addr, kernel_ulong_t data_size);
583 dumpiov_in_mmsghdr(struct tcb *, kernel_ulong_t addr);
586 dumpiov_upto(struct tcb *, int len, kernel_ulong_t addr, kernel_ulong_t data_size);
589 dumpstr(struct tcb *, kernel_ulong_t addr, int len);
592 printstr_ex(struct tcb *, kernel_ulong_t addr, kernel_ulong_t len,
593 unsigned int user_style);
596 printpathn(struct tcb *, kernel_ulong_t addr, unsigned int n);
599 printpath(struct tcb *, kernel_ulong_t addr);
601 #define TIMESPEC_TEXT_BUFSIZE \
602 (sizeof(long long) * 3 * 2 + sizeof("{tv_sec=-, tv_nsec=}"))
603 extern void printfd(struct tcb *, int);
604 extern void print_sockaddr(const void *sa, int len);
606 print_inet_addr(int af, const void *addr, unsigned int len, const char *var_name);
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 decode_seccomp_fprog(struct tcb *, kernel_ulong_t addr);
640 print_seccomp_fprog(struct tcb *, kernel_ulong_t addr, unsigned short len);
643 decode_sock_fprog(struct tcb *, kernel_ulong_t addr);
646 print_sock_fprog(struct tcb *, kernel_ulong_t addr, unsigned short len);
649 extern void print_struct_stat(struct tcb *, const struct strace_stat *const st);
651 struct strace_statfs;
654 print_struct_statfs(struct tcb *, kernel_ulong_t addr);
657 print_struct_statfs64(struct tcb *, kernel_ulong_t addr, kernel_ulong_t size);
659 extern void print_ifindex(unsigned int);
662 extern struct number_set read_set;
663 extern struct number_set write_set;
664 extern struct number_set signal_set;
666 extern bool is_number_in_set(unsigned int number, const struct number_set *);
667 extern void qualify(const char *);
668 extern unsigned int qual_flags(const unsigned int);
670 #define DECL_IOCTL(name) \
672 name ## _ioctl(struct tcb *, unsigned int request, kernel_ulong_t arg) \
673 /* End of DECL_IOCTL definition. */
686 extern int decode_sg_io_v4(struct tcb *, const kernel_ulong_t arg);
690 typedef bool (*netlink_decoder_t)(struct tcb *, const struct nlmsghdr *,
691 kernel_ulong_t addr, unsigned int len);
693 #define DECL_NETLINK(name) \
695 decode_netlink_ ## name(struct tcb *, const struct nlmsghdr *, \
696 kernel_ulong_t addr, unsigned int len) \
697 /* End of DECL_NETLINK definition. */
699 DECL_NETLINK(crypto);
700 DECL_NETLINK(selinux);
701 DECL_NETLINK(sock_diag);
703 extern int tv_nz(const struct timeval *);
704 extern int tv_cmp(const struct timeval *, const struct timeval *);
705 extern double tv_float(const struct timeval *);
706 extern void tv_add(struct timeval *, const struct timeval *, const struct timeval *);
707 extern void tv_sub(struct timeval *, const struct timeval *, const struct timeval *);
708 extern void tv_mul(struct timeval *, const struct timeval *, int);
709 extern void tv_div(struct timeval *, const struct timeval *, int);
712 extern void unwind_init(void);
713 extern void unwind_tcb_init(struct tcb *);
714 extern void unwind_tcb_fin(struct tcb *);
715 extern void unwind_cache_invalidate(struct tcb *);
716 extern void unwind_print_stacktrace(struct tcb *);
717 extern void unwind_capture_stacktrace(struct tcb *);
721 printstrn(struct tcb *tcp, kernel_ulong_t addr, kernel_ulong_t len)
723 printstr_ex(tcp, addr, len, 0);
727 printstr(struct tcb *tcp, kernel_ulong_t addr)
729 printstr_ex(tcp, addr, -1, QUOTE_0_TERMINATED);
733 printflags64(const struct xlat *x, uint64_t flags, const char *dflt)
735 return printflags_ex(flags, dflt, x, NULL);
739 printflags(const struct xlat *x, unsigned int flags, const char *dflt)
741 return printflags64(x, flags, dflt);
745 printxval64(const struct xlat *x, const uint64_t val, const char *dflt)
747 return printxvals(val, dflt, x, NULL);
751 printxval(const struct xlat *x, const unsigned int val, const char *dflt)
753 return printxvals(val, dflt, x, NULL);
757 tprint_iov(struct tcb *tcp, kernel_ulong_t len, kernel_ulong_t addr,
758 enum iov_decode decode_iov)
760 tprint_iov_upto(tcp, len, addr, decode_iov, -1);
768 extern void print_timeval32_t(const timeval32_t *);
769 extern void printrusage32(struct tcb *, kernel_ulong_t);
770 extern const char *sprint_timeval32(struct tcb *, kernel_ulong_t addr);
771 extern void print_timeval32(struct tcb *, kernel_ulong_t addr);
772 extern void print_timeval32_utimes(struct tcb *, kernel_ulong_t addr);
773 extern void print_itimerval32(struct tcb *, kernel_ulong_t addr);
776 #ifdef HAVE_STRUCT_USER_DESC
777 extern void print_user_desc(struct tcb *, kernel_ulong_t addr);
780 /* Strace log generation machinery.
782 * printing_tcp: tcb which has incomplete line being printed right now.
783 * NULL if last line has been completed ('\n'-terminated).
784 * printleader(tcp) examines it, finishes incomplete line if needed,
785 * the sets it to tcp.
786 * line_ended() clears printing_tcp and resets ->curcol = 0.
787 * tcp->curcol == 0 check is also used to detect completeness
788 * of last line, since in -ff mode just checking printing_tcp for NULL
791 * If you change this code, test log generation in both -f and -ff modes
793 * strace -oLOG -f[f] test/threaded_execve
794 * strace -oLOG -f[f] test/sigkill_rain
795 * strace -oLOG -f[f] -p "`pidof web_browser`"
797 extern struct tcb *printing_tcp;
798 extern void printleader(struct tcb *);
799 extern void line_ended(void);
800 extern void tabto(void);
801 extern void tprintf(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
802 extern void tprints(const char *str);
803 extern void tprintf_comment(const char *fmt, ...) ATTRIBUTE_FORMAT((printf, 1, 2));
804 extern void tprints_comment(const char *str);
806 #if SUPPORTED_PERSONALITIES > 1
807 extern void set_personality(int personality);
808 extern unsigned current_personality;
810 # define set_personality(personality) ((void)0)
811 # define current_personality 0
814 #if SUPPORTED_PERSONALITIES == 1
815 # define current_wordsize PERSONALITY0_WORDSIZE
816 # define current_klongsize PERSONALITY0_KLONGSIZE
818 # if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE
819 # define current_wordsize PERSONALITY0_WORDSIZE
821 extern unsigned current_wordsize;
823 # if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_KLONGSIZE == PERSONALITY1_KLONGSIZE
824 # define current_klongsize PERSONALITY0_KLONGSIZE
826 extern unsigned current_klongsize;
830 #define ANY_WORDSIZE_LESS_THAN_KERNEL_LONG \
831 (SIZEOF_KERNEL_LONG_T > 4 \
832 && (SIZEOF_LONG < SIZEOF_KERNEL_LONG_T || !defined(current_wordsize)))
834 #define DECL_PRINTNUM(name) \
836 printnum_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
837 ATTRIBUTE_FORMAT((printf, 3, 0)) \
838 /* End of DECL_PRINTNUM definition. */
840 DECL_PRINTNUM(short);
842 DECL_PRINTNUM(int64);
845 #define DECL_PRINTNUM_ADDR(name) \
847 printnum_addr_ ## name(struct tcb *, kernel_ulong_t addr) \
848 /* End of DECL_PRINTNUM_ADDR definition. */
850 DECL_PRINTNUM_ADDR(int);
851 DECL_PRINTNUM_ADDR(int64);
852 #undef DECL_PRINTNUM_ADDR
854 #ifndef current_wordsize
856 printnum_long_int(struct tcb *, kernel_ulong_t addr,
857 const char *fmt_long, const char *fmt_int)
858 ATTRIBUTE_FORMAT((printf, 3, 0))
859 ATTRIBUTE_FORMAT((printf, 4, 0));
860 extern bool printnum_addr_long_int(struct tcb *, kernel_ulong_t addr);
861 # define printnum_slong(tcp, addr) \
862 printnum_long_int((tcp), (addr), "%" PRId64, "%d")
863 # define printnum_ulong(tcp, addr) \
864 printnum_long_int((tcp), (addr), "%" PRIu64, "%u")
865 # define printnum_ptr(tcp, addr) \
866 printnum_addr_long_int((tcp), (addr))
867 #elif current_wordsize > 4
868 # define printnum_slong(tcp, addr) \
869 printnum_int64((tcp), (addr), "%" PRId64)
870 # define printnum_ulong(tcp, addr) \
871 printnum_int64((tcp), (addr), "%" PRIu64)
872 # define printnum_ptr(tcp, addr) \
873 printnum_addr_int64((tcp), (addr))
874 #else /* current_wordsize == 4 */
875 # define printnum_slong(tcp, addr) \
876 printnum_int((tcp), (addr), "%d")
877 # define printnum_ulong(tcp, addr) \
878 printnum_int((tcp), (addr), "%u")
879 # define printnum_ptr(tcp, addr) \
880 printnum_addr_int((tcp), (addr))
883 #ifndef current_klongsize
884 extern bool printnum_addr_klong_int(struct tcb *, kernel_ulong_t addr);
885 # define printnum_kptr(tcp, addr) \
886 printnum_addr_klong_int((tcp), (addr))
887 #elif current_klongsize > 4
888 # define printnum_kptr(tcp, addr) \
889 printnum_addr_int64((tcp), (addr))
890 #else /* current_klongsize == 4 */
891 # define printnum_kptr(tcp, addr) \
892 printnum_addr_int((tcp), (addr))
895 #define DECL_PRINTPAIR(name) \
897 printpair_ ## name(struct tcb *, kernel_ulong_t addr, const char *fmt) \
898 ATTRIBUTE_FORMAT((printf, 3, 0)) \
899 /* End of DECL_PRINTPAIR definition. */
902 DECL_PRINTPAIR(int64);
903 #undef DECL_PRINTPAIR
905 static inline kernel_long_t
906 truncate_klong_to_current_wordsize(const kernel_long_t v)
908 #if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
909 if (current_wordsize < sizeof(v)) {
918 static inline kernel_ulong_t
919 truncate_kulong_to_current_wordsize(const kernel_ulong_t v)
921 #if ANY_WORDSIZE_LESS_THAN_KERNEL_LONG
922 if (current_wordsize < sizeof(v)) {
923 return (unsigned int) v;
932 * Cast a pointer or a pointer-sized integer to kernel_ulong_t.
934 #define ptr_to_kulong(v) ((kernel_ulong_t) (unsigned long) (v))
937 * Zero-extend a signed integer type to unsigned long long.
939 #define zero_extend_signed_to_ull(v) \
940 (sizeof(v) == sizeof(char) ? (unsigned long long) (unsigned char) (v) : \
941 sizeof(v) == sizeof(short) ? (unsigned long long) (unsigned short) (v) : \
942 sizeof(v) == sizeof(int) ? (unsigned long long) (unsigned int) (v) : \
943 sizeof(v) == sizeof(long) ? (unsigned long long) (unsigned long) (v) : \
944 (unsigned long long) (v))
947 * Sign-extend an unsigned integer type to long long.
949 #define sign_extend_unsigned_to_ll(v) \
950 (sizeof(v) == sizeof(char) ? (long long) (char) (v) : \
951 sizeof(v) == sizeof(short) ? (long long) (short) (v) : \
952 sizeof(v) == sizeof(int) ? (long long) (int) (v) : \
953 sizeof(v) == sizeof(long) ? (long long) (long) (v) : \
956 extern const struct_sysent sysent0[];
957 extern const char *const errnoent0[];
958 extern const char *const signalent0[];
959 extern const struct_ioctlent ioctlent0[];
961 #if SUPPORTED_PERSONALITIES > 1
962 extern const struct_sysent *sysent;
963 extern const char *const *errnoent;
964 extern const char *const *signalent;
965 extern const struct_ioctlent *ioctlent;
967 # define sysent sysent0
968 # define errnoent errnoent0
969 # define signalent signalent0
970 # define ioctlent ioctlent0
973 extern unsigned nsyscalls;
974 extern unsigned nerrnos;
975 extern unsigned nsignals;
976 extern unsigned nioctlents;
978 extern const unsigned int nsyscall_vec[SUPPORTED_PERSONALITIES];
979 extern const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES];
980 extern struct inject_opts *inject_vec[SUPPORTED_PERSONALITIES];
982 #ifdef IN_MPERS_BOOTSTRAP
983 /* Transform multi-line MPERS_PRINTER_DECL statements to one-liners. */
984 # define MPERS_PRINTER_DECL(type, name, ...) MPERS_PRINTER_DECL(type, name, __VA_ARGS__)
985 #else /* !IN_MPERS_BOOTSTRAP */
986 # if SUPPORTED_PERSONALITIES > 1
987 # include "printers.h"
989 # include "native_printer_decls.h"
991 # define MPERS_PRINTER_DECL(type, name, ...) type MPERS_FUNC_NAME(name)(__VA_ARGS__)
992 #endif /* !IN_MPERS_BOOTSTRAP */
994 /* Checks that sysent[scno] is not out of range. */
996 scno_in_range(kernel_ulong_t scno)
998 return scno < nsyscalls;
1002 * Checks whether scno is not out of range,
1003 * its corresponding sysent[scno].sys_func is non-NULL,
1004 * and its sysent[scno].sys_flags has no TRACE_INDIRECT_SUBCALL flag set.
1007 scno_is_valid(kernel_ulong_t scno)
1009 return scno_in_range(scno)
1010 && sysent[scno].sys_func
1011 && !(sysent[scno].sys_flags & TRACE_INDIRECT_SUBCALL);
1014 #define MPERS_FUNC_NAME__(prefix, name) prefix ## name
1015 #define MPERS_FUNC_NAME_(prefix, name) MPERS_FUNC_NAME__(prefix, name)
1016 #define MPERS_FUNC_NAME(name) MPERS_FUNC_NAME_(MPERS_PREFIX, name)
1018 #define SYS_FUNC_NAME(syscall_name) MPERS_FUNC_NAME(syscall_name)
1020 #define SYS_FUNC(syscall_name) int SYS_FUNC_NAME(sys_ ## syscall_name)(struct tcb *tcp)
1022 #endif /* !STRACE_DEFS_H */