1 Noteworthy changes in release 4.12 (????-??-??)
2 ===============================================
5 * Implemented simultaneous use of -p option and tracing of a command.
6 (addresses Debian bug #549942).
7 * Implemented caching of netlink conversations to reduce amount of time
8 spent in decoding socket details in -yy mode.
9 * Implemented -yy mode decoding of protocol:portid pairs associated with
10 netlink socket descriptors.
11 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
12 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
14 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
15 * Enhanced decoding of RTC_* and VIDIOC_* ioctl commands.
16 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
17 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
18 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
19 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
20 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
21 statfs64, tgkill, waitid, and xattr family syscalls.
22 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
23 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
24 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
25 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
26 * Added decoding of fadvise64 and fadvise64_64 on s390.
27 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
28 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
29 * Updated lists of ioctl commands from Linux 4.6.
32 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
33 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
34 * Fixed decoding of mlock2 syscall on sparc.
35 * Fixed decoding of osf_shmat syscall on alpha.
36 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
37 (addresses Debian bug #485979 and Fedora bug #1298294).
38 * Fixed decoding of preadv syscall in case of short read.
39 * Fixed decoding and dumping of readv syscall in case of short read.
40 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
41 * Fixed decoding of mincore syscall's last argument.
42 * Fixed remaining errors in mapping between syscall numbers and numbers
44 * Applied various fixes to strace-graph script.
46 Noteworthy changes in release 4.11 (2015-12-21)
47 ===============================================
50 * Some syscalls have different names depending on architecture and
51 personality. In these cases, syscall filtering and printing now
52 consistently uses the names that match corresponding __NR_* kernel
53 macros of the tracee's architecture and personality.
54 * Added strace prefix to all diagnostic messages.
57 * Enhanced and extended test suite.
58 * Implemented reliable tracing of processes whose personality differs
59 from the personality of strace, fixed decoding of 32-bit personality
60 syscalls on 64-bit architectures.
61 * When some data referenced by syscall arguments is irrelevant or cannot
62 be read from tracee's memory, strace now prints its address consistently.
63 * When a syscall is restarted using restart_syscall mechanism, strace now
64 shows the syscall name on architectures that expose this information.
65 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
66 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
67 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
68 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
69 * Optimized decoding of indirect socket syscalls.
70 * Implemented decoding of nanoseconds along with seconds in stat family
71 syscalls (addresses Fedora bug #1251176).
72 * Implemented decoding of struct statfs.f_flags in statfs syscall.
73 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
75 * Implemented decoding of indirect syscall on mips o32.
76 * Implemented decoding of IPPROTO_IP control messages.
77 * Implemented decoding of setsockopt syscall multicast arguments.
78 * Enhanced decoding of struct sigevent.
79 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
80 and v4l2 ioctl syscall arguments.
81 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
82 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
83 sendfile, setsockopt, and shmctl syscalls.
84 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
85 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
86 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
87 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
88 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
89 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
91 * Added Nios II architecture support.
92 * Added new syscall entries to match Linux 4.4.
95 * Fixed potential short read of strings from tracee's memory.
96 * Fixed -qq option in conjunction with -o option.
97 * Fixed filtering of <unavailable> syscalls.
98 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
99 with 64-bit aligned structures.
100 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
101 syscall flags arguments.
102 * Fixed decoding of 4th argument of clock_nanosleep syscall.
103 * Fixed decoding of getpagesize syscall on m68k.
104 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
105 * Fixed decoding of timezone argument of gettimeofday and settimeofday
107 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
109 * Fixed decoding of pipe syscall on alpha and mips.
110 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
111 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
112 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
114 * Fixed decoding of 4th argument of semctl indirect syscall.
115 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
116 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
117 * Fixed decoding of struct dirent on x32.
118 * Fixed decoding of times syscall return value on mips n32 and x32.
119 * Fixed decoding of path argument of umount2 syscall
120 (addresses Debian bug #785050).
121 * Worked around a kernel bug in tracing privileged executables.
122 * Fixed various errors in mapping between syscall numbers and associated
123 information like the number of syscall arguments, the name of syscall,
126 Noteworthy changes in release 4.10 (2015-03-06)
127 ===============================================
130 * Added -yy option to print protocol and address information associated with
132 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
133 recvmsg, sendmmsg, and recvmmsg syscalls.
134 * Implemented full 32-bit decoding of ioctl commands
135 (addresses Debian bug #692913 and Fedora bug #902788).
136 * Implemented PTRACE_GETREGS API support on ia64.
137 * Implemented PTRACE_GETREGS API support on mips.
138 * Implemented PTRACE_GETREGSET API support on s390/s390x.
139 * Implemented decoding of getrandom and seccomp syscalls.
140 * Implemented full decoding of 64-bit capability sets.
141 * Implemented decoding of all prctl commands.
142 * Implemented decoding of parametrized ioctl commands.
143 * Implemented decoding of evdev ioctl commands.
144 * Implemented decoding of v4l ioctl commands.
145 * Implemented decoding of SG_IO v4 ioctl commands.
146 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
147 * Implemented decoding of FALLOC_FL_* fallocate flags.
148 * Implemented decoding of rt_sigreturn signal mask on aarch64,
150 * Enhanced socket decoder to support bluetooth sockets.
151 * Enhanced decoding of unlisted ioctl commands.
152 * Enhanced decoding of getsockopt and setsockopt syscall.
153 * Enhanced decoding of sysinfo syscall.
154 * Enhanced decoding of struct cmsghdr.
155 * Enhanced decoding of wait status.
156 * Enhanced aio support on non-x86 architectures by using external libaio.h.
157 * Added O_TMPFILE to the list of recognized open mode flags.
158 * Updated the list of filesystem type constants that is used in decoding
159 statfs family syscalls.
160 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
162 * Updated lists of signal constants from Linux 3.19.
163 * Updated lists of errno constants from Linux 3.19.
164 * Updated lists of ioctl commands from Linux 3.9.
165 * Added new syscall entries to match Linux 3.19.
168 * Fixed various errors in mapping between syscall numbers and associated
169 information like the number of syscall arguments, the name of syscall,
171 * Fixed quoting issues in printing descriptors, filenames, network interface
172 names, struct utsname members, device/volume names of BLK* ioctl commands.
173 * Fixed uid_t/git_t decoding.
174 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
175 * Fixed potential open flags truncation on some architectures.
176 * Fixed decoding of struct ifreq.ifr_name.
177 * Fixed decoding of SIOCSIFNAME ioctl command.
178 * Fixed decoding of RENAME_* renameat2 flags.
179 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
180 * Fixed decoding of indirect ipc subcalls on some architectures.
181 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
182 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
183 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
184 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
185 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
186 sparc, sparc64, mips, and s390.
187 * Fixed instruction pointer output (-i option) on architectures that support
188 several personalities.
189 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
191 * Fixed build on systems where struct sigaction has no sa_restorer member.
192 * Fixed build with uclibc and musl libc.
195 * Linux kernel >= 2.5.46 is required.
196 Older versions without a decent PTRACE_SETOPTIONS support will not work.
197 * On mips, linux kernel >= 2.6.15 is required.
198 Older versions without a decent PTRACE_GETREGS support will not work.
199 * On s390 and s390x, linux kernel >= 2.6.27 is required.
200 Older versions without a decent PTRACE_GETREGSET support will not work.
202 Noteworthy changes in release 4.9 (2014-08-15)
203 ==============================================
205 * Changes in behavior
206 * Disabled OABI support on ARM EABI systems by default,
207 added --enable-arm-oabi option to enable it at configure time.
210 * Added experimental -k option to print stack trace after each traced syscall.
211 * Added -w option to produce stats on syscall latency.
212 (addresses Debian bug #457497).
213 * Added ARC architecture support.
214 * Added PTRACE_GETREGS API support on PowerPC.
215 * Enhanced Bionic libc and musl libc support.
216 * Enhanced tracing of x86 personality processes on x86_64 and x32.
217 * Enhanced tracing of ARM personality processes on AArch64.
218 * Enhanced 32/64bit personality detection on PowerPC.
219 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
220 renameat2, and request_key syscalls.
221 * Robustified decoding of select, pselect, and io_submit syscalls.
222 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
223 setdomainname, sethostname, setns, and sync_file_range syscalls.
224 * Enhanced decoding of signal bitmasks.
225 * Enhanced decoding of file descriptors.
226 * Enhanced siginfo_t decoding.
227 * Enhanced PF_NETLINK decoding.
228 * Updated CLOCK_* constants
229 (addresses Fedora bug #1088455).
230 * Added new syscall entries to match Linux 3.16.
233 * Added shmat and shmdt to the set of memory mapping related syscalls.
234 * Fixed detaching from stopped processes.
235 * Fixed fanotify_mark decoding on 32bit architectures.
236 * Fixed offset decoding in preadv and pwritev syscalls.
237 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
238 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
239 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
240 (addresses Fedora bug #993384).
241 * Miscellaneous corrections in the manual page.
242 (Addresses Debian bug #725987).
244 Noteworthy changes in release 4.8 (2013-06-03)
245 ==============================================
247 * Changes in behavior
248 * In case of normal strace termination, when the trace output is
249 redirected to a pipe, strace now closes it and waits for the pipe
250 process termination before exit.
253 * Implemented tracing using PTRACE_SEIZE API (when available).
254 * Implemented more reliable PTRACE_GETREGSET-based process personality
255 detection on x86-64 and x32 (when available).
256 * Added -e trace=memory option for tracing memory mapping related syscalls.
257 * Documented -b option.
258 * Allowed exit status messages to be suppressed by giving -q option twice.
259 * Added AArch64 architecture support
260 (addresses Debian bug #693074 and Fedora bug #969858).
261 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
262 * Added tilegx personality support for Tile.
263 * Enhanced support of NOMMU architectures.
264 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
266 * Added new syscall entries to match Linux 3.9.
267 * Regenerated the list of common ioctl names from Linux 3.9.
268 * Updated the list of errno constants.
269 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
270 PTRACE_O_*, and TCP_* constants.
271 * Implemented decoding of UBI ioctls.
272 * Removed redundant "*32" ioctl names.
275 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
276 (addresses Fedora bug #659382).
277 * Fixed kernel release string parsing
278 (addresses Debian bug #702309).
279 * Fixed decoding of *xattr syscalls
280 (addresses Fedora bug #885233).
281 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
282 (addresses Fedora bug #912790).
283 * Fixed tracing forks on SPARC.
284 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
285 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
286 and truncate64 syscalls.
287 * Fixed categories of multiple syscalls on most of supported architectures.
288 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
289 * Fixed decoding of multiple 32-bit personality syscalls on x32.
290 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
291 S390x, and Tile architectures.
292 * Fixed semtimedop decoding on S390x.
293 * Fixed sram_alloc decoding on Blackfin.
294 * Fixed build when process_vm_readv is a stab.
295 * Fixed build with older versions of libaio.h.
297 Noteworthy changes in release 4.7 (2012-05-02)
298 ==============================================
300 * Changes in behavior
301 * strace no longer suspends waitpid until there is a child
302 for waitpid'ing process to collect status from.
303 * strace no longer detaches from a tracee which is supposed
305 * strace now issues a new message: "+++ exited with EXITCODE +++"
306 which shows exact moment strace got exit notification,
307 analogous to existing "+++ killed by SIG +++" message.
310 * Added x32 personality support (x86_64 architecture).
311 * Added -y and -P options to print file descriptor paths and
312 filter by those paths.
313 * Added -I option to control strace interactivity.
314 * Allowed -p option to take comma or whitespace-separated list of PIDs.
315 * Added strace_log_merge script helper to merge timestamped "strace -ff"
317 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
318 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
319 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
320 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
321 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
322 listxattr, setrlimit and swapon syscalls.
323 * Implemented decoding of loop and mtd ioctls.
324 * Added syscall entries for new linux syscalls.
325 * Added syscall entries for direct socket system calls on powerpc.
326 * Updated the list of errno constants.
327 * Updated lists of MSG_*, STA_*, and TCP_* constants.
328 * Regenerated the list of ioctl names from Linux 3.3.
329 * Enhanced switching between processes with different personalities.
330 * Enhanced signals reporting by using short signal names.
331 * Made ERESTART* messages more descriptive.
332 * Made parsing of numbers from strings more robust.
333 * Added support for compat_statfs64 and statfs64.f_flags.
334 * Changed read of data blocks to use single process_vm_readv syscall
335 (when available) instead of several PTRACE_PEEKDATA operations.
336 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
337 operation instead of several PTRACE_PEEKUSER operations.
338 * Applied various optimizations to make strace work faster.
341 * Implemented proper handling of real SIGTRAPs on kernels supporting
342 PTRACE_O_TRACESYSGOOD.
343 (Addresses Fedora bug #162774).
344 * Fixed sockaddr_un.sun_path name in decoded output.
345 (Addresses Debian bug #554946).
346 * Fixed to avoid potential core file clobbering on exit.
347 (Addresses Debian bug #656398).
348 * Fixed a typo in documentation.
349 (Addresses Debian bug #653309).
350 * Fixed decoding of timer id returned by timer_create.
351 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
352 * Fixed *at syscalls flags decoding.
353 * Fixed ARM EABI 64-bit syscall's arguments decoding.
354 * Fixed semtimedop decoding on s390.
355 * Fixed osf_sigprocmask decoding on alpha.
356 * Fixed ipc and socket subcall decoding on several architectures.
357 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
358 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
359 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
360 * Corrected io_* syscall entries on ARM.
361 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
362 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
363 * Fixed build when libaio-devel is not available.
364 * Fixed configure checks for PTRACE_* constants.
365 * Fixed compilation warnings remained on several architectures.
368 * Removed all non-Linux code. After years of neglect, that dead code
369 just hampered further strace development.
370 * Linux kernel >= 2.6.18 is recommended. Older versions might still
371 work but they haven't been thoroughly tested with this release.
373 Noteworthy changes in release 4.6 (2011-03-15)
374 ==============================================
376 * Changes in behavior
377 * Print diagnostic information about changes in personality mode to
378 standard error instead of standard output.
381 * Implemented a new method of following clone, fork, and vfork
382 syscalls using the Linux kernel's explicit facilities for tracing
383 creation of threads and child processes.
384 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
385 * Implemented decoding of TLS syscalls on m68k.
386 * Implemented biarch support on powerpc64.
387 * Implemented biarch support for getrlimit() and setrlimit().
388 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
389 * Implemented SOL_SCTP socket options decoding.
390 * Added HDIO_* ioctl names.
391 (Addresses Debian bug #450953).
392 * Added LOOP_* ioctl names.
393 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
394 to match Linux 2.6.37.
395 * Updated the list of IPPROTO_* constants to match netinet/in.h.
396 * Implemented decoding of HDIO_* and BLK* ioctls.
397 * Added MicroBlaze architecture support.
398 * Added new syscall entries to match Linux 2.6.37.
399 * Regenerated list of ioctl names from Linux 2.6.37.
400 * Enhanced signal notification decoding.
401 * Documented -C and -D options.
404 * Fixed fetching syscall arguments on m68k.
405 * Fixed an error when judging whether a process has children.
406 * Fixed get/set_robust_list syscall numbers for powerpc.
407 * Fixed a corner case in printing clone flags.
408 * Fixed cross-compiling issues.
409 * Fixed build issues on powerpc64, SH and SPARC.
410 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
411 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
412 fanotify_init, and fanotify_mark syscalls.
413 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
414 * Fixed biarch support in IO dumping.
415 * Fixed raw exit_group decoding.
416 * Fixed decoding of file descriptors on 64-bit architectures.
417 * Fixed a corner case in waitpid handling.
418 (Addresses Red Hat bug #663547).
419 * Fixed stat64 decoding on mips
420 (Addresses Debian bug #599028).
421 * Fixed misleading italics in the manual page.
422 (Addresses Debian bug #589323).
424 Noteworthy changes in release 4.5.20 (2010-04-13)
425 =================================================
428 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
429 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
430 rt_tgsigqueueinfo, perf_event_open.
431 * Enhanced decoding of recently added syscalls on non-x86 architectures
432 by replacing a bare decoder with elaborate parsers enabled earlier
434 * Implemented -C option to combine regular and -c output.
435 (Addresses Debian bug #466196)
436 * Enhanced decoding of mbind and mremap syscalls.
437 * Enhanced SOL_PACKET socket options decoding.
438 * Regenerated list of ioctl names from linux 2.6.33.
439 * Added TILE architecture support.
442 * Fixed build with Linux kernel headers 2.6.32-rc5+.
443 (Addresses Debian bug #560516 and Fedora bug #539044)
444 * Fixed build on mips.
445 * Fixed handling of Linux systems without struct statfs64.
446 * Fixed reporting signal mask by sigreturn on powerpc.
447 * Fixed potential stack buffer overflow in select decoder.
448 (Addresses Fedora bug #556678)
449 * Corrected msgsnd indirect ipccall decoding.
450 * Corrected decoding of 64bit syscalls.
451 (Addresses Debian bug #570603)
452 * Corrected getsockopt decoding on architectures where
453 sizeof(long) > sizeof(int).
454 (Addresses Debian bug #494844)
455 * Corrected decoding of epoll_pwait.
456 (Addresses Debian bug #513014)
457 * Corrected handling of killed threads.
459 Noteworthy changes in release 4.5.19 (2009-10-21)
460 =================================================
462 * Changes in behavior
463 * When command exits, strace now exits with the same exit status.
464 If command is terminated by a signal, strace terminates itself
465 with the same signal, so that strace can be used as a wrapper
466 process transparent to the invoking parent process.
467 When using -p option, the exit status of strace is zero unless
468 there was an unexpected error in doing the tracing.
469 (Addresses Fedora bug #105371 and Debian bug #37665)
472 * Implemented decoding of new Linux syscalls: accept4, dup3,
473 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
474 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
475 * Implemented decoding of accept4 socketcall.
476 * Enhanced prctl decoding.
477 * Enhanced nanosleep decoding.
478 * Enhanced ptrace decoding.
479 * Enhanced futex decoding.
480 * Enhanced CAP_* decoding.
481 * Enhanced SIOCS* ioctls decoding.
482 * Enhanced fcntl F_* flags decoding.
483 * Enhanced semop/semtimedop decoding.
484 * Updated ARM architecture support.
485 * Added Blackfin architecture support.
486 * Added AVR32 architecture support.
487 * Added CRIS architecture support.
488 * Made strace detect when traced process suddenly disappeared.
491 * Fixed syscall numbers for tee and sync_file_range.
492 (Addresses Debian bug #503124)
493 * Fixed several bugs in strings decoder, including potential heap
495 (Addresses Fedora bugs #470529, #478324 and #511035)
496 * Marked sendfile(2) as a network syscall.
497 (Addresses Debian bug #509499)
498 * Fixed accept(2) decoding.
499 (Addresses Debian bug #507573)
500 * Fixed sigtimedwait(2) decoding.
501 * Fixed build on ARM EABI.
502 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
503 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
504 (Addresses Red Hat bug #471169)
505 * Fixed display of 32-bit argv array on 64-bit architectures.
506 (Addresses Fedora bug #519480)
507 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
508 * Fixed HPPA architecture support.
509 (Addresses Debian bugs #437928 and #546619)
514 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
515 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
520 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
521 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
522 * Improved output for prctl system call on Linux.
523 * Improved support for Linux/ARM.
524 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
529 * Improved output for delete_module, futex, and mbind system calls on Linux.
530 * Improved output for SG_IO ioctls on Linux.
531 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
532 eventfd, getcpu, epoll_pwait.
537 * Several biarch improvements.
538 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
539 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
544 * Accept numeric system calls in -e.
549 * Introduce "-e trace=desc".
554 * Better x86-64 support for IA32 processes.
555 * Update PowerPC system calls.
556 * Better printing for Linux aio system calls.
560 * Quick fix release for build issues.
561 * One fix for Linux/ARM system call table.
566 * Print fault address for SIGSEGV/SIGBUS signals when available.
571 * Improve socket ioctl printing.
572 * Update Linux/IA64 syscall list.
573 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
574 * Improve mount flags printing.
575 * Support symbolic printing of x86_64 arch_prctl parameters.
580 * Update syscall tables for Alpha, ARM, HPPA.
581 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
582 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
583 * Improve ioctl command name matching.
584 * Print RTC_* ioctl structure contents.
585 * Support newer RLIMIT_* values.
586 * Print struct cmsghdr details in sendmsg.
591 * Print attribute values in *xattr system calls on Linux.
592 * Include pread and pwrite calls in -e read and -e write tracing.
593 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
594 * Print clock_t values symbolically in Linux clock_* system calls.
598 * Bug fixes, Linux ioctl updates.
599 * David Miller contributed support for Linux/SPARC64.
607 * Update Linux ioctl lists.
608 * Update PF_* and AF_* value lists.
609 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
614 * On Linux using NPTL threads, -p will now attach to all threads in a process.
615 * Handle new mq_* system calls in Linux 2.6.6 and later.
620 * Report some new VM_* bit values on Linux.
621 * Better output for Linux sched_* system calls.
626 * Display multiple ioctl name matches on Linux.
630 * New port to AMD's x86-64 architecture. One strace binary can
631 handle both new x86-64 and old i386 processes.
632 * Fixed support for LFS64 calls.
633 * New switch -E to add/remove environment variables for the command.
634 * Merged s390/s390x port.
635 * Trace an unbounded number of processes.
636 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
637 * Fixed bugs with attach/detach leaving things stopped.
638 * Fixed traced process seeing ECHILD despite live, traced children
639 in waitpid calls with WNOHANG.
640 * Stuart Menefy contributed a port to Linux/SH.
641 * Stephen Thomas contributed a port to Linux/SH64.
642 * Many other bug fixes.
646 * Fix Linux/ia64 support, looks like someone renamed a few things on us
647 * Fix the ioctl setup for Linux, turned out it did not really work.
648 Improve the ioctl extracter as well so we decode some more ones.
652 * compile fixes for Linux/mips
656 * Linux ia64 and hppa ports added
657 * The usual Linux syscall updates (includes 32bit uid/gid support),
658 * Linux ioctl list updated
659 * Support IPv6 scope ids
660 * FreeBSD/i386 port added
661 * UnixWare and Solaris updates
662 * Better support for tracing multithreaded processes in Linux
666 * Compiles on glibc2.0 systems again
667 * Linux/S390 port added
668 * The usual Linux syscall updates
669 * we can follow fork on arm now
673 * Linux/MIPS port added
674 * Lots of Linux updates again
675 * Improved IPv6 support
681 * Compiles on glibc2.0 systems again
685 * Get stat structure properly on Linux 64bit archs
686 * Personalities work again
687 * Compile correctly on SunOS again
693 * Linux (ultra)sparc fixes
700 * add support for more Linux architectures (powerpc, sparc, arm)
701 * support lots more Linux syscalls
702 * fix signal handling
703 * add IPX and IPIP support
704 * check stray syscall after execv
705 * fix hanging children
707 Changes in version 3.1
708 ======================
711 * Linux 68k is supported
712 * Linux alpha is supported
713 * configure is upgraded to autoconf 2.x
714 * using -f in combination with -e now works correctly
715 * output can be piped to a program
716 * tracing setuid programs works better
717 * it is now reasonable to install strace setuid to root in some circumstances
718 * new useful tracing names like file and process to trace whole
719 classes of system calls, e.g. -efile traces all system calls that
720 take a file name as an argument
721 * IPC calls on SunOS 4.1.x are decoded
722 * Linux program memory is reliably dereferenced
723 * Linux decodes at least the name of all syscalls as of pre2.0.4
724 * various cosmetic changes and bug fixes
726 Changes from versions 2.x to version 3.0
727 ========================================
729 * filename arguments are neither abbreviated nor stringified
730 * string arguments are now true C strings using octal instead of hex by default
731 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
732 * by default the output for multiple processes now goes into one file
733 * all structures, vectors, bitsets, etc. use consistent output formats
734 * the -c option now means count calls, -i does what the old -c used to do
736 New Features in version 3.0
737 ===========================
739 * non-ascii strings can be optionally printed entirely in hex
740 * the output format is readable when mutiple processes are generating output
741 * exit values are printed in an alignment column
742 * is is possible to suppress messages about attaching and detaching
743 * various tracing features can be enabled on a per syscall/signal/desc basis
744 * selective tracing of syscalls
745 * selective printing of syscall structures
746 * selective abbreviation of long structures on a per syscall basis
747 * selective printing of raw syscall arguments and results
748 * selective tracing of signals
749 * selective dumping of all I/O read from file descriptors
750 * selective dumping of all I/O written to file descriptors
751 * optional counting of time, calls, and errors for each syscall