1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Implemented decoding of SCM_TIMESTAMP* control messages.
8 * In interactive mode (-I2), those signals that were blocked at startup
9 will remain blocked for the whole period of strace execution.
10 * strace no longer resets SIGCHLD handler in tracees to the default action.
11 * When traced command is terminated by a blocked signal, strace unblocks
12 that signal to ensure its own termination with the same signal.
13 * Fixed corner cases in decoding of old sigaction syscall.
14 * Fixed build with old kernel headers on mips.
16 Noteworthy changes in release 4.17 (2017-05-24)
17 ===============================================
19 * Changes in command line syntax
20 * Syscall classes specified in -e trace= option now have % prefix (like
21 -e trace=%process). Old style class names without leading % are still
22 supported, but considered deprecated now.
25 * Optimized syscall filtering.
26 * Improved representation of timestamps.
27 * Enhanced decoding of sched_setattr syscall.
28 * Added -e trace=%stat option for tracing variants of stat syscall.
29 * Added -e trace=%lstat option for tracing variants of lstat syscall.
30 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
32 * Added -e trace=%%stat option for tracing syscalls used for querying file
33 status information (stat, lstat, fstat, fstatat, statx, and their
35 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
37 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
39 * Added -e trace=%%statfs option for tracing syscalls used for querying file
40 system statistics information (statfs-like, fstatfs-like and ustat).
41 * Added -e trace=/regex option for filtering syscalls using regular
43 * Added support for prepending of question mark before syscall qualification
44 in -e trace expressions in order to suppress error in case no syscalls
45 matched the provided qualification.
46 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
47 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
48 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
50 * Implemented decoding of statx syscall.
51 * Implemented decoding of NS_* ioctl commands.
52 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
53 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
54 * Implemented decoding of NLMSG_ERROR netlink messages.
55 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
56 * Improved decoding of misplaced parts in DM_* ioctl commands.
57 * Updated lists of ioctl commands from Linux 4.11.
60 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
61 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
62 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
63 powerpc64, sh, sh64, sparc, and sparc64.
64 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
65 * Fixed decoding of netlink messages received within struct msghdr.
66 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
67 argument of sched_getattr syscall being not quite 32-bit.
68 * Fixed corner cases of printing inaccessible times argument of utimes
69 and futimesat syscalls.
71 Noteworthy changes in release 4.16 (2017-02-14)
72 ===============================================
75 * Implemented syscall return value injection (-e inject=SET:retval= option).
76 * Implemented signal injection (-e inject=SET:signal= option).
77 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
78 * Implemented decoding of all SG_* ioctl commands.
79 * Implemented decoding of ustat syscall.
80 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
81 and BPF_PROG_DETACH commands of bpf syscall.
82 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
83 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
85 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
86 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
87 * Updated lists of ioctl commands from Linux 4.10.
88 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
92 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
93 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
94 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
95 and pwritev* syscalls on x32.
96 * Fixed printing of string arguments of getxattr and setxattr syscalls
97 when -s option is used to limit the printed string size.
98 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
100 * Fixed decoding of SG_* and LOOP_* ioctl commands.
101 * Fixed build on mips with musl libc.
102 * Fixed cross-building of ioctlsort.
103 * Applied minor formatting fixes to the manual page.
105 Noteworthy changes in release 4.15 (2016-12-14)
106 ===============================================
108 * Changes in behavior
109 * Time stamps are now printed according to ISO 8601.
110 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
111 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
112 syscalls is now formatted as an array.
115 * Implemented syscall fault injection (-e fault=... option).
116 * Implemented decoding of DM_* ioctl commands.
117 * Implemented decoding of attr parameter of perf_event_open syscall.
118 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
119 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
120 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
122 * Implemented PTRACE_GETREGS API support on m68k.
123 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
124 and V4L2_* constants.
125 * Updated lists of ioctl commands from Linux 4.9.
126 * Added decoding of recently added syscalls on arc, x32, and xtensa.
127 * Enhanced manual page.
130 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
131 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
132 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
133 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
134 setgroups, setns, unshare, and utimes syscalls.
135 * Fixed handling of verbose flag in printing of controls array
136 of struct v4l2_ext_controls.
137 * Fixed omission of field names in the output of capability, sigaction,
138 sigevent, statfs, timespec, timeval, and utimbuf structures.
139 * Fixed printing of unknown syscalls in siginfo structure.
140 * Fixed decoding of ioctl constants on m68k.
141 * Fixed cris architecture support.
142 * Fixed cross build when host compiler does not support the same
143 set of warning flags as the cross compiler.
144 * Fixed build on SLE10 and SLE11.
146 Noteworthy changes in release 4.14 (2016-10-04)
147 ===============================================
149 * Changes in behavior
150 * When using -p option without a command and no processes has been attached,
151 strace exits with exit status 1.
154 * Added printing of the mode argument of open and openat syscalls
155 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
156 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
157 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
158 and aio family syscalls.
159 * Implemented fetching of the 7th subcall argument on mips o32.
160 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
162 * Updated lists of ioctl commands from Linux 4.8.
163 * Added decoding of new syscalls on sh and sh64.
164 * Added RISC-V architecture support.
167 * Marked io_setup and io_destroy as memory mapping related syscalls.
168 * Fixed leakage of placeholder descriptors to tracees.
169 * Fixed printing of mode_t, umode_t, and umask types.
170 * Fixed decoding of iovec arrays without a limit on total data size.
171 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
172 and ipc family syscalls.
173 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
174 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
176 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
177 * Fixed decoding of struct stat64 on sparc64.
178 * Fixed decoding of uid and gid-related syscalls on sparc64.
179 * Fixed decoding of the forth argument of semctl syscall on sparc64.
180 * Fixed values of tty ioctl constants on sparc64.
181 * Fixed sparc personality support on sparc64.
183 Noteworthy changes in release 4.13 (2016-07-26)
184 ===============================================
187 * Implemented a general netlink socket parser.
188 * Enhanced decoding of socket addresses.
189 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
190 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
191 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
192 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
193 and *_MAGIC constants.
194 * Updated lists of ioctl commands from Linux 4.7.
197 * Fixed decoding of pid_t argument of prlimit64 syscall.
198 * Fixed sign extension issues in the parser of struct rusage.
199 * Fixed race condition in decoding of timeout argument of recvmmsg and
200 rt_sigtimedwait syscalls.
201 * Fixed build with fresh linux kernel headers.
203 Noteworthy changes in release 4.12 (2016-05-31)
204 ===============================================
207 * Implemented simultaneous use of -p option and tracing of a command.
208 (addresses Debian bug #549942).
209 * Implemented caching of netlink conversations to reduce amount of time
210 spent in decoding socket details in -yy mode.
211 * Implemented -yy mode decoding of protocol:portid pairs associated with
212 netlink socket descriptors.
213 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
214 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
216 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
217 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
218 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
219 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
220 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
221 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
222 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
223 statfs64, tgkill, waitid, and xattr family syscalls.
224 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
225 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
226 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
227 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
228 * Added decoding of fadvise64 and fadvise64_64 on s390.
229 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
230 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
231 * Updated lists of ioctl commands from Linux 4.6.
234 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
235 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
236 * Fixed decoding of mlock2 syscall on sparc.
237 * Fixed decoding of osf_shmat syscall on alpha.
238 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
239 (addresses Debian bug #485979 and Fedora bug #1298294).
240 * Fixed decoding of preadv syscall in case of short read.
241 * Fixed decoding and dumping of readv syscall in case of short read.
242 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
243 * Fixed decoding of mincore syscall's last argument.
244 * Fixed remaining errors in mapping between syscall numbers and numbers
245 of syscall arguments.
246 * Applied various fixes to strace-graph script.
248 Noteworthy changes in release 4.11 (2015-12-21)
249 ===============================================
251 * Changes in behavior
252 * Some syscalls have different names depending on architecture and
253 personality. In these cases, syscall filtering and printing now
254 consistently uses the names that match corresponding __NR_* kernel
255 macros of the tracee's architecture and personality.
256 * Added strace prefix to all diagnostic messages.
259 * Enhanced and extended test suite.
260 * Implemented reliable tracing of processes whose personality differs
261 from the personality of strace, fixed decoding of 32-bit personality
262 syscalls on 64-bit architectures.
263 * When some data referenced by syscall arguments is irrelevant or cannot
264 be read from tracee's memory, strace now prints its address consistently.
265 * When a syscall is restarted using restart_syscall mechanism, strace now
266 shows the syscall name on architectures that expose this information.
267 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
268 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
269 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
270 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
271 * Optimized decoding of indirect socket syscalls.
272 * Implemented decoding of nanoseconds along with seconds in stat family
273 syscalls (addresses Fedora bug #1251176).
274 * Implemented decoding of struct statfs.f_flags in statfs syscall.
275 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
277 * Implemented decoding of indirect syscall on mips o32.
278 * Implemented decoding of IPPROTO_IP control messages.
279 * Implemented decoding of setsockopt syscall multicast arguments.
280 * Enhanced decoding of struct sigevent.
281 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
282 and v4l2 ioctl syscall arguments.
283 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
284 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
285 sendfile, setsockopt, and shmctl syscalls.
286 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
287 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
288 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
289 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
290 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
291 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
293 * Added Nios II architecture support.
294 * Added new syscall entries to match Linux 4.4.
297 * Fixed potential short read of strings from tracee's memory.
298 * Fixed -qq option in conjunction with -o option.
299 * Fixed filtering of <unavailable> syscalls.
300 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
301 with 64-bit aligned structures.
302 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
303 syscall flags arguments.
304 * Fixed decoding of 4th argument of clock_nanosleep syscall.
305 * Fixed decoding of getpagesize syscall on m68k.
306 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
307 * Fixed decoding of timezone argument of gettimeofday and settimeofday
309 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
311 * Fixed decoding of pipe syscall on alpha and mips.
312 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
313 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
314 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
316 * Fixed decoding of 4th argument of semctl indirect syscall.
317 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
318 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
319 * Fixed decoding of struct dirent on x32.
320 * Fixed decoding of times syscall return value on mips n32 and x32.
321 * Fixed decoding of path argument of umount2 syscall
322 (addresses Debian bug #785050).
323 * Worked around a kernel bug in tracing privileged executables.
324 * Fixed various errors in mapping between syscall numbers and associated
325 information like the number of syscall arguments, the name of syscall,
328 Noteworthy changes in release 4.10 (2015-03-06)
329 ===============================================
332 * Added -yy option to print protocol and address information associated with
334 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
335 recvmsg, sendmmsg, and recvmmsg syscalls.
336 * Implemented full 32-bit decoding of ioctl commands
337 (addresses Debian bug #692913 and Fedora bug #902788).
338 * Implemented PTRACE_GETREGS API support on ia64.
339 * Implemented PTRACE_GETREGS API support on mips.
340 * Implemented PTRACE_GETREGSET API support on s390/s390x.
341 * Implemented decoding of getrandom and seccomp syscalls.
342 * Implemented full decoding of 64-bit capability sets.
343 * Implemented decoding of all prctl commands.
344 * Implemented decoding of parametrized ioctl commands.
345 * Implemented decoding of evdev ioctl commands.
346 * Implemented decoding of v4l ioctl commands.
347 * Implemented decoding of SG_IO v4 ioctl commands.
348 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
349 * Implemented decoding of FALLOC_FL_* fallocate flags.
350 * Implemented decoding of rt_sigreturn signal mask on aarch64,
352 * Enhanced socket decoder to support bluetooth sockets.
353 * Enhanced decoding of unlisted ioctl commands.
354 * Enhanced decoding of getsockopt and setsockopt syscall.
355 * Enhanced decoding of sysinfo syscall.
356 * Enhanced decoding of struct cmsghdr.
357 * Enhanced decoding of wait status.
358 * Enhanced aio support on non-x86 architectures by using external libaio.h.
359 * Added O_TMPFILE to the list of recognized open mode flags.
360 * Updated the list of filesystem type constants that is used in decoding
361 statfs family syscalls.
362 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
364 * Updated lists of signal constants from Linux 3.19.
365 * Updated lists of errno constants from Linux 3.19.
366 * Updated lists of ioctl commands from Linux 3.9.
367 * Added new syscall entries to match Linux 3.19.
370 * Fixed various errors in mapping between syscall numbers and associated
371 information like the number of syscall arguments, the name of syscall,
373 * Fixed quoting issues in printing descriptors, filenames, network interface
374 names, struct utsname members, device/volume names of BLK* ioctl commands.
375 * Fixed uid_t/git_t decoding.
376 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
377 * Fixed potential open flags truncation on some architectures.
378 * Fixed decoding of struct ifreq.ifr_name.
379 * Fixed decoding of SIOCSIFNAME ioctl command.
380 * Fixed decoding of RENAME_* renameat2 flags.
381 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
382 * Fixed decoding of indirect ipc subcalls on some architectures.
383 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
384 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
385 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
386 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
387 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
388 sparc, sparc64, mips, and s390.
389 * Fixed instruction pointer output (-i option) on architectures that support
390 several personalities.
391 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
393 * Fixed build on systems where struct sigaction has no sa_restorer member.
394 * Fixed build with uclibc and musl libc.
397 * Linux kernel >= 2.5.46 is required.
398 Older versions without a decent PTRACE_SETOPTIONS support will not work.
399 * On mips, linux kernel >= 2.6.15 is required.
400 Older versions without a decent PTRACE_GETREGS support will not work.
401 * On s390 and s390x, linux kernel >= 2.6.27 is required.
402 Older versions without a decent PTRACE_GETREGSET support will not work.
404 Noteworthy changes in release 4.9 (2014-08-15)
405 ==============================================
407 * Changes in behavior
408 * Disabled OABI support on ARM EABI systems by default,
409 added --enable-arm-oabi option to enable it at configure time.
412 * Added experimental -k option to print stack trace after each traced syscall.
413 * Added -w option to produce stats on syscall latency.
414 (addresses Debian bug #457497).
415 * Added ARC architecture support.
416 * Added PTRACE_GETREGS API support on PowerPC.
417 * Enhanced Bionic libc and musl libc support.
418 * Enhanced tracing of x86 personality processes on x86_64 and x32.
419 * Enhanced tracing of ARM personality processes on AArch64.
420 * Enhanced 32/64bit personality detection on PowerPC.
421 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
422 renameat2, and request_key syscalls.
423 * Robustified decoding of select, pselect, and io_submit syscalls.
424 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
425 setdomainname, sethostname, setns, and sync_file_range syscalls.
426 * Enhanced decoding of signal bitmasks.
427 * Enhanced decoding of file descriptors.
428 * Enhanced siginfo_t decoding.
429 * Enhanced PF_NETLINK decoding.
430 * Updated CLOCK_* constants
431 (addresses Fedora bug #1088455).
432 * Added new syscall entries to match Linux 3.16.
435 * Added shmat and shmdt to the set of memory mapping related syscalls.
436 * Fixed detaching from stopped processes.
437 * Fixed fanotify_mark decoding on 32bit architectures.
438 * Fixed offset decoding in preadv and pwritev syscalls.
439 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
440 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
441 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
442 (addresses Fedora bug #993384).
443 * Miscellaneous corrections in the manual page.
444 (Addresses Debian bug #725987).
446 Noteworthy changes in release 4.8 (2013-06-03)
447 ==============================================
449 * Changes in behavior
450 * In case of normal strace termination, when the trace output is
451 redirected to a pipe, strace now closes it and waits for the pipe
452 process termination before exit.
455 * Implemented tracing using PTRACE_SEIZE API (when available).
456 * Implemented more reliable PTRACE_GETREGSET-based process personality
457 detection on x86-64 and x32 (when available).
458 * Added -e trace=memory option for tracing memory mapping related syscalls.
459 * Documented -b option.
460 * Allowed exit status messages to be suppressed by giving -q option twice.
461 * Added AArch64 architecture support
462 (addresses Debian bug #693074 and Fedora bug #969858).
463 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
464 * Added tilegx personality support for Tile.
465 * Enhanced support of NOMMU architectures.
466 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
468 * Added new syscall entries to match Linux 3.9.
469 * Regenerated the list of common ioctl names from Linux 3.9.
470 * Updated the list of errno constants.
471 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
472 PTRACE_O_*, and TCP_* constants.
473 * Implemented decoding of UBI ioctls.
474 * Removed redundant "*32" ioctl names.
477 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
478 (addresses Fedora bug #659382).
479 * Fixed kernel release string parsing
480 (addresses Debian bug #702309).
481 * Fixed decoding of *xattr syscalls
482 (addresses Fedora bug #885233).
483 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
484 (addresses Fedora bug #912790).
485 * Fixed tracing forks on SPARC.
486 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
487 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
488 and truncate64 syscalls.
489 * Fixed categories of multiple syscalls on most of supported architectures.
490 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
491 * Fixed decoding of multiple 32-bit personality syscalls on x32.
492 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
493 S390x, and Tile architectures.
494 * Fixed semtimedop decoding on S390x.
495 * Fixed sram_alloc decoding on Blackfin.
496 * Fixed build when process_vm_readv is a stab.
497 * Fixed build with older versions of libaio.h.
499 Noteworthy changes in release 4.7 (2012-05-02)
500 ==============================================
502 * Changes in behavior
503 * strace no longer suspends waitpid until there is a child
504 for waitpid'ing process to collect status from.
505 * strace no longer detaches from a tracee which is supposed
507 * strace now issues a new message: "+++ exited with EXITCODE +++"
508 which shows exact moment strace got exit notification,
509 analogous to existing "+++ killed by SIG +++" message.
512 * Added x32 personality support (x86_64 architecture).
513 * Added -y and -P options to print file descriptor paths and
514 filter by those paths.
515 * Added -I option to control strace interactivity.
516 * Allowed -p option to take comma or whitespace-separated list of PIDs.
517 * Added strace_log_merge script helper to merge timestamped "strace -ff"
519 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
520 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
521 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
522 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
523 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
524 listxattr, setrlimit and swapon syscalls.
525 * Implemented decoding of loop and mtd ioctls.
526 * Added syscall entries for new linux syscalls.
527 * Added syscall entries for direct socket system calls on powerpc.
528 * Updated the list of errno constants.
529 * Updated lists of MSG_*, STA_*, and TCP_* constants.
530 * Regenerated the list of ioctl names from Linux 3.3.
531 * Enhanced switching between processes with different personalities.
532 * Enhanced signals reporting by using short signal names.
533 * Made ERESTART* messages more descriptive.
534 * Made parsing of numbers from strings more robust.
535 * Added support for compat_statfs64 and statfs64.f_flags.
536 * Changed read of data blocks to use single process_vm_readv syscall
537 (when available) instead of several PTRACE_PEEKDATA operations.
538 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
539 operation instead of several PTRACE_PEEKUSER operations.
540 * Applied various optimizations to make strace work faster.
543 * Implemented proper handling of real SIGTRAPs on kernels supporting
544 PTRACE_O_TRACESYSGOOD.
545 (Addresses Fedora bug #162774).
546 * Fixed sockaddr_un.sun_path name in decoded output.
547 (Addresses Debian bug #554946).
548 * Fixed to avoid potential core file clobbering on exit.
549 (Addresses Debian bug #656398).
550 * Fixed a typo in documentation.
551 (Addresses Debian bug #653309).
552 * Fixed decoding of timer id returned by timer_create.
553 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
554 * Fixed *at syscalls flags decoding.
555 * Fixed ARM EABI 64-bit syscall's arguments decoding.
556 * Fixed semtimedop decoding on s390.
557 * Fixed osf_sigprocmask decoding on alpha.
558 * Fixed ipc and socket subcall decoding on several architectures.
559 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
560 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
561 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
562 * Corrected io_* syscall entries on ARM.
563 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
564 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
565 * Fixed build when libaio-devel is not available.
566 * Fixed configure checks for PTRACE_* constants.
567 * Fixed compilation warnings remained on several architectures.
570 * Removed all non-Linux code. After years of neglect, that dead code
571 just hampered further strace development.
572 * Linux kernel >= 2.6.18 is recommended. Older versions might still
573 work but they haven't been thoroughly tested with this release.
575 Noteworthy changes in release 4.6 (2011-03-15)
576 ==============================================
578 * Changes in behavior
579 * Print diagnostic information about changes in personality mode to
580 standard error instead of standard output.
583 * Implemented a new method of following clone, fork, and vfork
584 syscalls using the Linux kernel's explicit facilities for tracing
585 creation of threads and child processes.
586 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
587 * Implemented decoding of TLS syscalls on m68k.
588 * Implemented biarch support on powerpc64.
589 * Implemented biarch support for getrlimit() and setrlimit().
590 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
591 * Implemented SOL_SCTP socket options decoding.
592 * Added HDIO_* ioctl names.
593 (Addresses Debian bug #450953).
594 * Added LOOP_* ioctl names.
595 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
596 to match Linux 2.6.37.
597 * Updated the list of IPPROTO_* constants to match netinet/in.h.
598 * Implemented decoding of HDIO_* and BLK* ioctls.
599 * Added MicroBlaze architecture support.
600 * Added new syscall entries to match Linux 2.6.37.
601 * Regenerated list of ioctl names from Linux 2.6.37.
602 * Enhanced signal notification decoding.
603 * Documented -C and -D options.
606 * Fixed fetching syscall arguments on m68k.
607 * Fixed an error when judging whether a process has children.
608 * Fixed get/set_robust_list syscall numbers for powerpc.
609 * Fixed a corner case in printing clone flags.
610 * Fixed cross-compiling issues.
611 * Fixed build issues on powerpc64, SH and SPARC.
612 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
613 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
614 fanotify_init, and fanotify_mark syscalls.
615 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
616 * Fixed biarch support in IO dumping.
617 * Fixed raw exit_group decoding.
618 * Fixed decoding of file descriptors on 64-bit architectures.
619 * Fixed a corner case in waitpid handling.
620 (Addresses Red Hat bug #663547).
621 * Fixed stat64 decoding on mips
622 (Addresses Debian bug #599028).
623 * Fixed misleading italics in the manual page.
624 (Addresses Debian bug #589323).
626 Noteworthy changes in release 4.5.20 (2010-04-13)
627 =================================================
630 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
631 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
632 rt_tgsigqueueinfo, perf_event_open.
633 * Enhanced decoding of recently added syscalls on non-x86 architectures
634 by replacing a bare decoder with elaborate parsers enabled earlier
636 * Implemented -C option to combine regular and -c output.
637 (Addresses Debian bug #466196)
638 * Enhanced decoding of mbind and mremap syscalls.
639 * Enhanced SOL_PACKET socket options decoding.
640 * Regenerated list of ioctl names from linux 2.6.33.
641 * Added TILE architecture support.
644 * Fixed build with Linux kernel headers 2.6.32-rc5+.
645 (Addresses Debian bug #560516 and Fedora bug #539044)
646 * Fixed build on mips.
647 * Fixed handling of Linux systems without struct statfs64.
648 * Fixed reporting signal mask by sigreturn on powerpc.
649 * Fixed potential stack buffer overflow in select decoder.
650 (Addresses Fedora bug #556678)
651 * Corrected msgsnd indirect ipccall decoding.
652 * Corrected decoding of 64bit syscalls.
653 (Addresses Debian bug #570603)
654 * Corrected getsockopt decoding on architectures where
655 sizeof(long) > sizeof(int).
656 (Addresses Debian bug #494844)
657 * Corrected decoding of epoll_pwait.
658 (Addresses Debian bug #513014)
659 * Corrected handling of killed threads.
661 Noteworthy changes in release 4.5.19 (2009-10-21)
662 =================================================
664 * Changes in behavior
665 * When command exits, strace now exits with the same exit status.
666 If command is terminated by a signal, strace terminates itself
667 with the same signal, so that strace can be used as a wrapper
668 process transparent to the invoking parent process.
669 When using -p option, the exit status of strace is zero unless
670 there was an unexpected error in doing the tracing.
671 (Addresses Fedora bug #105371 and Debian bug #37665)
674 * Implemented decoding of new Linux syscalls: accept4, dup3,
675 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
676 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
677 * Implemented decoding of accept4 socketcall.
678 * Enhanced prctl decoding.
679 * Enhanced nanosleep decoding.
680 * Enhanced ptrace decoding.
681 * Enhanced futex decoding.
682 * Enhanced CAP_* decoding.
683 * Enhanced SIOCS* ioctls decoding.
684 * Enhanced fcntl F_* flags decoding.
685 * Enhanced semop/semtimedop decoding.
686 * Updated ARM architecture support.
687 * Added Blackfin architecture support.
688 * Added AVR32 architecture support.
689 * Added CRIS architecture support.
690 * Made strace detect when traced process suddenly disappeared.
693 * Fixed syscall numbers for tee and sync_file_range.
694 (Addresses Debian bug #503124)
695 * Fixed several bugs in strings decoder, including potential heap
697 (Addresses Fedora bugs #470529, #478324 and #511035)
698 * Marked sendfile(2) as a network syscall.
699 (Addresses Debian bug #509499)
700 * Fixed accept(2) decoding.
701 (Addresses Debian bug #507573)
702 * Fixed sigtimedwait(2) decoding.
703 * Fixed build on ARM EABI.
704 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
705 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
706 (Addresses Red Hat bug #471169)
707 * Fixed display of 32-bit argv array on 64-bit architectures.
708 (Addresses Fedora bug #519480)
709 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
710 * Fixed HPPA architecture support.
711 (Addresses Debian bugs #437928 and #546619)
716 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
717 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
722 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
723 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
724 * Improved output for prctl system call on Linux.
725 * Improved support for Linux/ARM.
726 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
731 * Improved output for delete_module, futex, and mbind system calls on Linux.
732 * Improved output for SG_IO ioctls on Linux.
733 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
734 eventfd, getcpu, epoll_pwait.
739 * Several biarch improvements.
740 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
741 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
746 * Accept numeric system calls in -e.
751 * Introduce "-e trace=desc".
756 * Better x86-64 support for IA32 processes.
757 * Update PowerPC system calls.
758 * Better printing for Linux aio system calls.
762 * Quick fix release for build issues.
763 * One fix for Linux/ARM system call table.
768 * Print fault address for SIGSEGV/SIGBUS signals when available.
773 * Improve socket ioctl printing.
774 * Update Linux/IA64 syscall list.
775 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
776 * Improve mount flags printing.
777 * Support symbolic printing of x86_64 arch_prctl parameters.
782 * Update syscall tables for Alpha, ARM, HPPA.
783 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
784 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
785 * Improve ioctl command name matching.
786 * Print RTC_* ioctl structure contents.
787 * Support newer RLIMIT_* values.
788 * Print struct cmsghdr details in sendmsg.
793 * Print attribute values in *xattr system calls on Linux.
794 * Include pread and pwrite calls in -e read and -e write tracing.
795 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
796 * Print clock_t values symbolically in Linux clock_* system calls.
800 * Bug fixes, Linux ioctl updates.
801 * David Miller contributed support for Linux/SPARC64.
809 * Update Linux ioctl lists.
810 * Update PF_* and AF_* value lists.
811 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
816 * On Linux using NPTL threads, -p will now attach to all threads in a process.
817 * Handle new mq_* system calls in Linux 2.6.6 and later.
822 * Report some new VM_* bit values on Linux.
823 * Better output for Linux sched_* system calls.
828 * Display multiple ioctl name matches on Linux.
832 * New port to AMD's x86-64 architecture. One strace binary can
833 handle both new x86-64 and old i386 processes.
834 * Fixed support for LFS64 calls.
835 * New switch -E to add/remove environment variables for the command.
836 * Merged s390/s390x port.
837 * Trace an unbounded number of processes.
838 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
839 * Fixed bugs with attach/detach leaving things stopped.
840 * Fixed traced process seeing ECHILD despite live, traced children
841 in waitpid calls with WNOHANG.
842 * Stuart Menefy contributed a port to Linux/SH.
843 * Stephen Thomas contributed a port to Linux/SH64.
844 * Many other bug fixes.
848 * Fix Linux/ia64 support, looks like someone renamed a few things on us
849 * Fix the ioctl setup for Linux, turned out it did not really work.
850 Improve the ioctl extractor as well so we decode some more ones.
854 * compile fixes for Linux/mips
858 * Linux ia64 and hppa ports added
859 * The usual Linux syscall updates (includes 32bit uid/gid support),
860 * Linux ioctl list updated
861 * Support IPv6 scope ids
862 * FreeBSD/i386 port added
863 * UnixWare and Solaris updates
864 * Better support for tracing multithreaded processes in Linux
868 * Compiles on glibc2.0 systems again
869 * Linux/S390 port added
870 * The usual Linux syscall updates
871 * we can follow fork on arm now
875 * Linux/MIPS port added
876 * Lots of Linux updates again
877 * Improved IPv6 support
883 * Compiles on glibc2.0 systems again
887 * Get stat structure properly on Linux 64bit archs
888 * Personalities work again
889 * Compile correctly on SunOS again
895 * Linux (ultra)sparc fixes
902 * add support for more Linux architectures (powerpc, sparc, arm)
903 * support lots more Linux syscalls
904 * fix signal handling
905 * add IPX and IPIP support
906 * check stray syscall after execv
907 * fix hanging children
909 Changes in version 3.1
910 ======================
913 * Linux 68k is supported
914 * Linux alpha is supported
915 * configure is upgraded to autoconf 2.x
916 * using -f in combination with -e now works correctly
917 * output can be piped to a program
918 * tracing setuid programs works better
919 * it is now reasonable to install strace setuid to root in some circumstances
920 * new useful tracing names like file and process to trace whole
921 classes of system calls, e.g. -efile traces all system calls that
922 take a file name as an argument
923 * IPC calls on SunOS 4.1.x are decoded
924 * Linux program memory is reliably dereferenced
925 * Linux decodes at least the name of all syscalls as of pre2.0.4
926 * various cosmetic changes and bug fixes
928 Changes from versions 2.x to version 3.0
929 ========================================
931 * filename arguments are neither abbreviated nor stringified
932 * string arguments are now true C strings using octal instead of hex by default
933 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
934 * by default the output for multiple processes now goes into one file
935 * all structures, vectors, bitsets, etc. use consistent output formats
936 * the -c option now means count calls, -i does what the old -c used to do
938 New Features in version 3.0
939 ===========================
941 * non-ascii strings can be optionally printed entirely in hex
942 * the output format is readable when multiple processes are generating output
943 * exit values are printed in an alignment column
944 * is is possible to suppress messages about attaching and detaching
945 * various tracing features can be enabled on a per syscall/signal/desc basis
946 * selective tracing of syscalls
947 * selective printing of syscall structures
948 * selective abbreviation of long structures on a per syscall basis
949 * selective printing of raw syscall arguments and results
950 * selective tracing of signals
951 * selective dumping of all I/O read from file descriptors
952 * selective dumping of all I/O written to file descriptors
953 * optional counting of time, calls, and errors for each syscall
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