1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
4 * Changes in command line syntax
5 * Syscall classes specified in -e trace= option now have % prefix (like
6 -e trace=%process). Old style class names without leading % are still
7 supported, but considered deprecated now.
10 * Optimized syscall filtering.
11 * Improved representation of timestamps.
12 * Enhanced decoding of sched_setattr syscall.
13 * Added -e trace=%stat option for tracing variants of stat syscall.
14 * Added -e trace=%lstat option for tracing variants of lstat syscall.
15 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
17 * Added -e trace=%%stat option for tracing syscalls used for querying file
18 status information (stat, lstat, fstat, fstatat, statx, and their
20 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
22 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
24 * Added -e trace=%%statfs option for tracing syscalls used for querying file
25 system statistics information (statfs-like, fstatfs-like and ustat).
26 * Added -e trace=/regex option for filtering syscalls using regular
28 * Added support for prepending of question mark before syscall qualification
29 in -e trace expressions in order to suppress error in case no syscalls
30 matched the provided qualification.
31 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
32 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
33 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
35 * Implemented decoding of statx syscall.
36 * Implemented decoding of NS_* ioctl commands.
37 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
38 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
39 * Implemented decoding of NLMSG_ERROR netlink messages.
40 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
41 * Improved decoding of misplaced parts in DM_* ioctl commands.
42 * Updated lists of ioctl commands from Linux 4.11.
45 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
46 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
47 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
48 powerpc64, sh, sh64, sparc, and sparc64.
49 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
50 * Fixed decoding of netlink messages received within struct msghdr.
51 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
52 argument of sched_getattr syscall being not quite 32-bit.
53 * Fixed corner cases of printing inaccessible times argument of utimes
54 and futimesat syscalls.
56 Noteworthy changes in release 4.16 (2017-02-14)
57 ===============================================
60 * Implemented syscall return value injection (-e inject=SET:retval= option).
61 * Implemented signal injection (-e inject=SET:signal= option).
62 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
63 * Implemented decoding of all SG_* ioctl commands.
64 * Implemented decoding of ustat syscall.
65 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
66 and BPF_PROG_DETACH commands of bpf syscall.
67 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
68 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
70 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
71 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
72 * Updated lists of ioctl commands from Linux 4.10.
73 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
77 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
78 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
79 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
80 and pwritev* syscalls on x32.
81 * Fixed printing of string arguments of getxattr and setxattr syscalls
82 when -s option is used to limit the printed string size.
83 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
85 * Fixed decoding of SG_* and LOOP_* ioctl commands.
86 * Fixed build on mips with musl libc.
87 * Fixed cross-building of ioctlsort.
88 * Applied minor formatting fixes to the manual page.
90 Noteworthy changes in release 4.15 (2016-12-14)
91 ===============================================
94 * Time stamps are now printed according to ISO 8601.
95 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
96 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
97 syscalls is now formatted as an array.
100 * Implemented syscall fault injection (-e fault=... option).
101 * Implemented decoding of DM_* ioctl commands.
102 * Implemented decoding of attr parameter of perf_event_open syscall.
103 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
104 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
105 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
107 * Implemented PTRACE_GETREGS API support on m68k.
108 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
109 and V4L2_* constants.
110 * Updated lists of ioctl commands from Linux 4.9.
111 * Added decoding of recently added syscalls on arc, x32, and xtensa.
112 * Enhanced manual page.
115 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
116 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
117 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
118 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
119 setgroups, setns, unshare, and utimes syscalls.
120 * Fixed handling of verbose flag in printing of controls array
121 of struct v4l2_ext_controls.
122 * Fixed omission of field names in the output of capability, sigaction,
123 sigevent, statfs, timespec, timeval, and utimbuf structures.
124 * Fixed printing of unknown syscalls in siginfo structure.
125 * Fixed decoding of ioctl constants on m68k.
126 * Fixed cris architecture support.
127 * Fixed cross build when host compiler does not support the same
128 set of warning flags as the cross compiler.
129 * Fixed build on SLE10 and SLE11.
131 Noteworthy changes in release 4.14 (2016-10-04)
132 ===============================================
134 * Changes in behavior
135 * When using -p option without a command and no processes has been attached,
136 strace exits with exit status 1.
139 * Added printing of the mode argument of open and openat syscalls
140 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
141 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
142 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
143 and aio family syscalls.
144 * Implemented fetching of the 7th subcall argument on mips o32.
145 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
147 * Updated lists of ioctl commands from Linux 4.8.
148 * Added decoding of new syscalls on sh and sh64.
149 * Added RISC-V architecture support.
152 * Marked io_setup and io_destroy as memory mapping related syscalls.
153 * Fixed leakage of placeholder descriptors to tracees.
154 * Fixed printing of mode_t, umode_t, and umask types.
155 * Fixed decoding of iovec arrays without a limit on total data size.
156 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
157 and ipc family syscalls.
158 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
159 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
161 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
162 * Fixed decoding of struct stat64 on sparc64.
163 * Fixed decoding of uid and gid-related syscalls on sparc64.
164 * Fixed decoding of the forth argument of semctl syscall on sparc64.
165 * Fixed values of tty ioctl constants on sparc64.
166 * Fixed sparc personality support on sparc64.
168 Noteworthy changes in release 4.13 (2016-07-26)
169 ===============================================
172 * Implemented a general netlink socket parser.
173 * Enhanced decoding of socket addresses.
174 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
175 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
176 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
177 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
178 and *_MAGIC constants.
179 * Updated lists of ioctl commands from Linux 4.7.
182 * Fixed decoding of pid_t argument of prlimit64 syscall.
183 * Fixed sign extension issues in the parser of struct rusage.
184 * Fixed race condition in decoding of timeout argument of recvmmsg and
185 rt_sigtimedwait syscalls.
186 * Fixed build with fresh linux kernel headers.
188 Noteworthy changes in release 4.12 (2016-05-31)
189 ===============================================
192 * Implemented simultaneous use of -p option and tracing of a command.
193 (addresses Debian bug #549942).
194 * Implemented caching of netlink conversations to reduce amount of time
195 spent in decoding socket details in -yy mode.
196 * Implemented -yy mode decoding of protocol:portid pairs associated with
197 netlink socket descriptors.
198 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
199 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
201 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
202 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
203 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
204 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
205 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
206 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
207 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
208 statfs64, tgkill, waitid, and xattr family syscalls.
209 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
210 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
211 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
212 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
213 * Added decoding of fadvise64 and fadvise64_64 on s390.
214 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
215 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
216 * Updated lists of ioctl commands from Linux 4.6.
219 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
220 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
221 * Fixed decoding of mlock2 syscall on sparc.
222 * Fixed decoding of osf_shmat syscall on alpha.
223 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
224 (addresses Debian bug #485979 and Fedora bug #1298294).
225 * Fixed decoding of preadv syscall in case of short read.
226 * Fixed decoding and dumping of readv syscall in case of short read.
227 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
228 * Fixed decoding of mincore syscall's last argument.
229 * Fixed remaining errors in mapping between syscall numbers and numbers
230 of syscall arguments.
231 * Applied various fixes to strace-graph script.
233 Noteworthy changes in release 4.11 (2015-12-21)
234 ===============================================
236 * Changes in behavior
237 * Some syscalls have different names depending on architecture and
238 personality. In these cases, syscall filtering and printing now
239 consistently uses the names that match corresponding __NR_* kernel
240 macros of the tracee's architecture and personality.
241 * Added strace prefix to all diagnostic messages.
244 * Enhanced and extended test suite.
245 * Implemented reliable tracing of processes whose personality differs
246 from the personality of strace, fixed decoding of 32-bit personality
247 syscalls on 64-bit architectures.
248 * When some data referenced by syscall arguments is irrelevant or cannot
249 be read from tracee's memory, strace now prints its address consistently.
250 * When a syscall is restarted using restart_syscall mechanism, strace now
251 shows the syscall name on architectures that expose this information.
252 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
253 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
254 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
255 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
256 * Optimized decoding of indirect socket syscalls.
257 * Implemented decoding of nanoseconds along with seconds in stat family
258 syscalls (addresses Fedora bug #1251176).
259 * Implemented decoding of struct statfs.f_flags in statfs syscall.
260 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
262 * Implemented decoding of indirect syscall on mips o32.
263 * Implemented decoding of IPPROTO_IP control messages.
264 * Implemented decoding of setsockopt syscall multicast arguments.
265 * Enhanced decoding of struct sigevent.
266 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
267 and v4l2 ioctl syscall arguments.
268 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
269 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
270 sendfile, setsockopt, and shmctl syscalls.
271 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
272 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
273 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
274 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
275 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
276 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
278 * Added Nios II architecture support.
279 * Added new syscall entries to match Linux 4.4.
282 * Fixed potential short read of strings from tracee's memory.
283 * Fixed -qq option in conjunction with -o option.
284 * Fixed filtering of <unavailable> syscalls.
285 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
286 with 64-bit aligned structures.
287 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
288 syscall flags arguments.
289 * Fixed decoding of 4th argument of clock_nanosleep syscall.
290 * Fixed decoding of getpagesize syscall on m68k.
291 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
292 * Fixed decoding of timezone argument of gettimeofday and settimeofday
294 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
296 * Fixed decoding of pipe syscall on alpha and mips.
297 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
298 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
299 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
301 * Fixed decoding of 4th argument of semctl indirect syscall.
302 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
303 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
304 * Fixed decoding of struct dirent on x32.
305 * Fixed decoding of times syscall return value on mips n32 and x32.
306 * Fixed decoding of path argument of umount2 syscall
307 (addresses Debian bug #785050).
308 * Worked around a kernel bug in tracing privileged executables.
309 * Fixed various errors in mapping between syscall numbers and associated
310 information like the number of syscall arguments, the name of syscall,
313 Noteworthy changes in release 4.10 (2015-03-06)
314 ===============================================
317 * Added -yy option to print protocol and address information associated with
319 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
320 recvmsg, sendmmsg, and recvmmsg syscalls.
321 * Implemented full 32-bit decoding of ioctl commands
322 (addresses Debian bug #692913 and Fedora bug #902788).
323 * Implemented PTRACE_GETREGS API support on ia64.
324 * Implemented PTRACE_GETREGS API support on mips.
325 * Implemented PTRACE_GETREGSET API support on s390/s390x.
326 * Implemented decoding of getrandom and seccomp syscalls.
327 * Implemented full decoding of 64-bit capability sets.
328 * Implemented decoding of all prctl commands.
329 * Implemented decoding of parametrized ioctl commands.
330 * Implemented decoding of evdev ioctl commands.
331 * Implemented decoding of v4l ioctl commands.
332 * Implemented decoding of SG_IO v4 ioctl commands.
333 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
334 * Implemented decoding of FALLOC_FL_* fallocate flags.
335 * Implemented decoding of rt_sigreturn signal mask on aarch64,
337 * Enhanced socket decoder to support bluetooth sockets.
338 * Enhanced decoding of unlisted ioctl commands.
339 * Enhanced decoding of getsockopt and setsockopt syscall.
340 * Enhanced decoding of sysinfo syscall.
341 * Enhanced decoding of struct cmsghdr.
342 * Enhanced decoding of wait status.
343 * Enhanced aio support on non-x86 architectures by using external libaio.h.
344 * Added O_TMPFILE to the list of recognized open mode flags.
345 * Updated the list of filesystem type constants that is used in decoding
346 statfs family syscalls.
347 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
349 * Updated lists of signal constants from Linux 3.19.
350 * Updated lists of errno constants from Linux 3.19.
351 * Updated lists of ioctl commands from Linux 3.9.
352 * Added new syscall entries to match Linux 3.19.
355 * Fixed various errors in mapping between syscall numbers and associated
356 information like the number of syscall arguments, the name of syscall,
358 * Fixed quoting issues in printing descriptors, filenames, network interface
359 names, struct utsname members, device/volume names of BLK* ioctl commands.
360 * Fixed uid_t/git_t decoding.
361 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
362 * Fixed potential open flags truncation on some architectures.
363 * Fixed decoding of struct ifreq.ifr_name.
364 * Fixed decoding of SIOCSIFNAME ioctl command.
365 * Fixed decoding of RENAME_* renameat2 flags.
366 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
367 * Fixed decoding of indirect ipc subcalls on some architectures.
368 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
369 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
370 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
371 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
372 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
373 sparc, sparc64, mips, and s390.
374 * Fixed instruction pointer output (-i option) on architectures that support
375 several personalities.
376 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
378 * Fixed build on systems where struct sigaction has no sa_restorer member.
379 * Fixed build with uclibc and musl libc.
382 * Linux kernel >= 2.5.46 is required.
383 Older versions without a decent PTRACE_SETOPTIONS support will not work.
384 * On mips, linux kernel >= 2.6.15 is required.
385 Older versions without a decent PTRACE_GETREGS support will not work.
386 * On s390 and s390x, linux kernel >= 2.6.27 is required.
387 Older versions without a decent PTRACE_GETREGSET support will not work.
389 Noteworthy changes in release 4.9 (2014-08-15)
390 ==============================================
392 * Changes in behavior
393 * Disabled OABI support on ARM EABI systems by default,
394 added --enable-arm-oabi option to enable it at configure time.
397 * Added experimental -k option to print stack trace after each traced syscall.
398 * Added -w option to produce stats on syscall latency.
399 (addresses Debian bug #457497).
400 * Added ARC architecture support.
401 * Added PTRACE_GETREGS API support on PowerPC.
402 * Enhanced Bionic libc and musl libc support.
403 * Enhanced tracing of x86 personality processes on x86_64 and x32.
404 * Enhanced tracing of ARM personality processes on AArch64.
405 * Enhanced 32/64bit personality detection on PowerPC.
406 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
407 renameat2, and request_key syscalls.
408 * Robustified decoding of select, pselect, and io_submit syscalls.
409 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
410 setdomainname, sethostname, setns, and sync_file_range syscalls.
411 * Enhanced decoding of signal bitmasks.
412 * Enhanced decoding of file descriptors.
413 * Enhanced siginfo_t decoding.
414 * Enhanced PF_NETLINK decoding.
415 * Updated CLOCK_* constants
416 (addresses Fedora bug #1088455).
417 * Added new syscall entries to match Linux 3.16.
420 * Added shmat and shmdt to the set of memory mapping related syscalls.
421 * Fixed detaching from stopped processes.
422 * Fixed fanotify_mark decoding on 32bit architectures.
423 * Fixed offset decoding in preadv and pwritev syscalls.
424 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
425 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
426 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
427 (addresses Fedora bug #993384).
428 * Miscellaneous corrections in the manual page.
429 (Addresses Debian bug #725987).
431 Noteworthy changes in release 4.8 (2013-06-03)
432 ==============================================
434 * Changes in behavior
435 * In case of normal strace termination, when the trace output is
436 redirected to a pipe, strace now closes it and waits for the pipe
437 process termination before exit.
440 * Implemented tracing using PTRACE_SEIZE API (when available).
441 * Implemented more reliable PTRACE_GETREGSET-based process personality
442 detection on x86-64 and x32 (when available).
443 * Added -e trace=memory option for tracing memory mapping related syscalls.
444 * Documented -b option.
445 * Allowed exit status messages to be suppressed by giving -q option twice.
446 * Added AArch64 architecture support
447 (addresses Debian bug #693074 and Fedora bug #969858).
448 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
449 * Added tilegx personality support for Tile.
450 * Enhanced support of NOMMU architectures.
451 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
453 * Added new syscall entries to match Linux 3.9.
454 * Regenerated the list of common ioctl names from Linux 3.9.
455 * Updated the list of errno constants.
456 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
457 PTRACE_O_*, and TCP_* constants.
458 * Implemented decoding of UBI ioctls.
459 * Removed redundant "*32" ioctl names.
462 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
463 (addresses Fedora bug #659382).
464 * Fixed kernel release string parsing
465 (addresses Debian bug #702309).
466 * Fixed decoding of *xattr syscalls
467 (addresses Fedora bug #885233).
468 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
469 (addresses Fedora bug #912790).
470 * Fixed tracing forks on SPARC.
471 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
472 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
473 and truncate64 syscalls.
474 * Fixed categories of multiple syscalls on most of supported architectures.
475 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
476 * Fixed decoding of multiple 32-bit personality syscalls on x32.
477 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
478 S390x, and Tile architectures.
479 * Fixed semtimedop decoding on S390x.
480 * Fixed sram_alloc decoding on Blackfin.
481 * Fixed build when process_vm_readv is a stab.
482 * Fixed build with older versions of libaio.h.
484 Noteworthy changes in release 4.7 (2012-05-02)
485 ==============================================
487 * Changes in behavior
488 * strace no longer suspends waitpid until there is a child
489 for waitpid'ing process to collect status from.
490 * strace no longer detaches from a tracee which is supposed
492 * strace now issues a new message: "+++ exited with EXITCODE +++"
493 which shows exact moment strace got exit notification,
494 analogous to existing "+++ killed by SIG +++" message.
497 * Added x32 personality support (x86_64 architecture).
498 * Added -y and -P options to print file descriptor paths and
499 filter by those paths.
500 * Added -I option to control strace interactivity.
501 * Allowed -p option to take comma or whitespace-separated list of PIDs.
502 * Added strace_log_merge script helper to merge timestamped "strace -ff"
504 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
505 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
506 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
507 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
508 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
509 listxattr, setrlimit and swapon syscalls.
510 * Implemented decoding of loop and mtd ioctls.
511 * Added syscall entries for new linux syscalls.
512 * Added syscall entries for direct socket system calls on powerpc.
513 * Updated the list of errno constants.
514 * Updated lists of MSG_*, STA_*, and TCP_* constants.
515 * Regenerated the list of ioctl names from Linux 3.3.
516 * Enhanced switching between processes with different personalities.
517 * Enhanced signals reporting by using short signal names.
518 * Made ERESTART* messages more descriptive.
519 * Made parsing of numbers from strings more robust.
520 * Added support for compat_statfs64 and statfs64.f_flags.
521 * Changed read of data blocks to use single process_vm_readv syscall
522 (when available) instead of several PTRACE_PEEKDATA operations.
523 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
524 operation instead of several PTRACE_PEEKUSER operations.
525 * Applied various optimizations to make strace work faster.
528 * Implemented proper handling of real SIGTRAPs on kernels supporting
529 PTRACE_O_TRACESYSGOOD.
530 (Addresses Fedora bug #162774).
531 * Fixed sockaddr_un.sun_path name in decoded output.
532 (Addresses Debian bug #554946).
533 * Fixed to avoid potential core file clobbering on exit.
534 (Addresses Debian bug #656398).
535 * Fixed a typo in documentation.
536 (Addresses Debian bug #653309).
537 * Fixed decoding of timer id returned by timer_create.
538 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
539 * Fixed *at syscalls flags decoding.
540 * Fixed ARM EABI 64-bit syscall's arguments decoding.
541 * Fixed semtimedop decoding on s390.
542 * Fixed osf_sigprocmask decoding on alpha.
543 * Fixed ipc and socket subcall decoding on several architectures.
544 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
545 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
546 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
547 * Corrected io_* syscall entries on ARM.
548 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
549 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
550 * Fixed build when libaio-devel is not available.
551 * Fixed configure checks for PTRACE_* constants.
552 * Fixed compilation warnings remained on several architectures.
555 * Removed all non-Linux code. After years of neglect, that dead code
556 just hampered further strace development.
557 * Linux kernel >= 2.6.18 is recommended. Older versions might still
558 work but they haven't been thoroughly tested with this release.
560 Noteworthy changes in release 4.6 (2011-03-15)
561 ==============================================
563 * Changes in behavior
564 * Print diagnostic information about changes in personality mode to
565 standard error instead of standard output.
568 * Implemented a new method of following clone, fork, and vfork
569 syscalls using the Linux kernel's explicit facilities for tracing
570 creation of threads and child processes.
571 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
572 * Implemented decoding of TLS syscalls on m68k.
573 * Implemented biarch support on powerpc64.
574 * Implemented biarch support for getrlimit() and setrlimit().
575 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
576 * Implemented SOL_SCTP socket options decoding.
577 * Added HDIO_* ioctl names.
578 (Addresses Debian bug #450953).
579 * Added LOOP_* ioctl names.
580 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
581 to match Linux 2.6.37.
582 * Updated the list of IPPROTO_* constants to match netinet/in.h.
583 * Implemented decoding of HDIO_* and BLK* ioctls.
584 * Added MicroBlaze architecture support.
585 * Added new syscall entries to match Linux 2.6.37.
586 * Regenerated list of ioctl names from Linux 2.6.37.
587 * Enhanced signal notification decoding.
588 * Documented -C and -D options.
591 * Fixed fetching syscall arguments on m68k.
592 * Fixed an error when judging whether a process has children.
593 * Fixed get/set_robust_list syscall numbers for powerpc.
594 * Fixed a corner case in printing clone flags.
595 * Fixed cross-compiling issues.
596 * Fixed build issues on powerpc64, SH and SPARC.
597 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
598 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
599 fanotify_init, and fanotify_mark syscalls.
600 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
601 * Fixed biarch support in IO dumping.
602 * Fixed raw exit_group decoding.
603 * Fixed decoding of file descriptors on 64-bit architectures.
604 * Fixed a corner case in waitpid handling.
605 (Addresses Red Hat bug #663547).
606 * Fixed stat64 decoding on mips
607 (Addresses Debian bug #599028).
608 * Fixed misleading italics in the manual page.
609 (Addresses Debian bug #589323).
611 Noteworthy changes in release 4.5.20 (2010-04-13)
612 =================================================
615 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
616 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
617 rt_tgsigqueueinfo, perf_event_open.
618 * Enhanced decoding of recently added syscalls on non-x86 architectures
619 by replacing a bare decoder with elaborate parsers enabled earlier
621 * Implemented -C option to combine regular and -c output.
622 (Addresses Debian bug #466196)
623 * Enhanced decoding of mbind and mremap syscalls.
624 * Enhanced SOL_PACKET socket options decoding.
625 * Regenerated list of ioctl names from linux 2.6.33.
626 * Added TILE architecture support.
629 * Fixed build with Linux kernel headers 2.6.32-rc5+.
630 (Addresses Debian bug #560516 and Fedora bug #539044)
631 * Fixed build on mips.
632 * Fixed handling of Linux systems without struct statfs64.
633 * Fixed reporting signal mask by sigreturn on powerpc.
634 * Fixed potential stack buffer overflow in select decoder.
635 (Addresses Fedora bug #556678)
636 * Corrected msgsnd indirect ipccall decoding.
637 * Corrected decoding of 64bit syscalls.
638 (Addresses Debian bug #570603)
639 * Corrected getsockopt decoding on architectures where
640 sizeof(long) > sizeof(int).
641 (Addresses Debian bug #494844)
642 * Corrected decoding of epoll_pwait.
643 (Addresses Debian bug #513014)
644 * Corrected handling of killed threads.
646 Noteworthy changes in release 4.5.19 (2009-10-21)
647 =================================================
649 * Changes in behavior
650 * When command exits, strace now exits with the same exit status.
651 If command is terminated by a signal, strace terminates itself
652 with the same signal, so that strace can be used as a wrapper
653 process transparent to the invoking parent process.
654 When using -p option, the exit status of strace is zero unless
655 there was an unexpected error in doing the tracing.
656 (Addresses Fedora bug #105371 and Debian bug #37665)
659 * Implemented decoding of new Linux syscalls: accept4, dup3,
660 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
661 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
662 * Implemented decoding of accept4 socketcall.
663 * Enhanced prctl decoding.
664 * Enhanced nanosleep decoding.
665 * Enhanced ptrace decoding.
666 * Enhanced futex decoding.
667 * Enhanced CAP_* decoding.
668 * Enhanced SIOCS* ioctls decoding.
669 * Enhanced fcntl F_* flags decoding.
670 * Enhanced semop/semtimedop decoding.
671 * Updated ARM architecture support.
672 * Added Blackfin architecture support.
673 * Added AVR32 architecture support.
674 * Added CRIS architecture support.
675 * Made strace detect when traced process suddenly disappeared.
678 * Fixed syscall numbers for tee and sync_file_range.
679 (Addresses Debian bug #503124)
680 * Fixed several bugs in strings decoder, including potential heap
682 (Addresses Fedora bugs #470529, #478324 and #511035)
683 * Marked sendfile(2) as a network syscall.
684 (Addresses Debian bug #509499)
685 * Fixed accept(2) decoding.
686 (Addresses Debian bug #507573)
687 * Fixed sigtimedwait(2) decoding.
688 * Fixed build on ARM EABI.
689 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
690 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
691 (Addresses Red Hat bug #471169)
692 * Fixed display of 32-bit argv array on 64-bit architectures.
693 (Addresses Fedora bug #519480)
694 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
695 * Fixed HPPA architecture support.
696 (Addresses Debian bugs #437928 and #546619)
701 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
702 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
707 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
708 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
709 * Improved output for prctl system call on Linux.
710 * Improved support for Linux/ARM.
711 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
716 * Improved output for delete_module, futex, and mbind system calls on Linux.
717 * Improved output for SG_IO ioctls on Linux.
718 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
719 eventfd, getcpu, epoll_pwait.
724 * Several biarch improvements.
725 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
726 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
731 * Accept numeric system calls in -e.
736 * Introduce "-e trace=desc".
741 * Better x86-64 support for IA32 processes.
742 * Update PowerPC system calls.
743 * Better printing for Linux aio system calls.
747 * Quick fix release for build issues.
748 * One fix for Linux/ARM system call table.
753 * Print fault address for SIGSEGV/SIGBUS signals when available.
758 * Improve socket ioctl printing.
759 * Update Linux/IA64 syscall list.
760 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
761 * Improve mount flags printing.
762 * Support symbolic printing of x86_64 arch_prctl parameters.
767 * Update syscall tables for Alpha, ARM, HPPA.
768 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
769 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
770 * Improve ioctl command name matching.
771 * Print RTC_* ioctl structure contents.
772 * Support newer RLIMIT_* values.
773 * Print struct cmsghdr details in sendmsg.
778 * Print attribute values in *xattr system calls on Linux.
779 * Include pread and pwrite calls in -e read and -e write tracing.
780 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
781 * Print clock_t values symbolically in Linux clock_* system calls.
785 * Bug fixes, Linux ioctl updates.
786 * David Miller contributed support for Linux/SPARC64.
794 * Update Linux ioctl lists.
795 * Update PF_* and AF_* value lists.
796 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
801 * On Linux using NPTL threads, -p will now attach to all threads in a process.
802 * Handle new mq_* system calls in Linux 2.6.6 and later.
807 * Report some new VM_* bit values on Linux.
808 * Better output for Linux sched_* system calls.
813 * Display multiple ioctl name matches on Linux.
817 * New port to AMD's x86-64 architecture. One strace binary can
818 handle both new x86-64 and old i386 processes.
819 * Fixed support for LFS64 calls.
820 * New switch -E to add/remove environment variables for the command.
821 * Merged s390/s390x port.
822 * Trace an unbounded number of processes.
823 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
824 * Fixed bugs with attach/detach leaving things stopped.
825 * Fixed traced process seeing ECHILD despite live, traced children
826 in waitpid calls with WNOHANG.
827 * Stuart Menefy contributed a port to Linux/SH.
828 * Stephen Thomas contributed a port to Linux/SH64.
829 * Many other bug fixes.
833 * Fix Linux/ia64 support, looks like someone renamed a few things on us
834 * Fix the ioctl setup for Linux, turned out it did not really work.
835 Improve the ioctl extracter as well so we decode some more ones.
839 * compile fixes for Linux/mips
843 * Linux ia64 and hppa ports added
844 * The usual Linux syscall updates (includes 32bit uid/gid support),
845 * Linux ioctl list updated
846 * Support IPv6 scope ids
847 * FreeBSD/i386 port added
848 * UnixWare and Solaris updates
849 * Better support for tracing multithreaded processes in Linux
853 * Compiles on glibc2.0 systems again
854 * Linux/S390 port added
855 * The usual Linux syscall updates
856 * we can follow fork on arm now
860 * Linux/MIPS port added
861 * Lots of Linux updates again
862 * Improved IPv6 support
868 * Compiles on glibc2.0 systems again
872 * Get stat structure properly on Linux 64bit archs
873 * Personalities work again
874 * Compile correctly on SunOS again
880 * Linux (ultra)sparc fixes
887 * add support for more Linux architectures (powerpc, sparc, arm)
888 * support lots more Linux syscalls
889 * fix signal handling
890 * add IPX and IPIP support
891 * check stray syscall after execv
892 * fix hanging children
894 Changes in version 3.1
895 ======================
898 * Linux 68k is supported
899 * Linux alpha is supported
900 * configure is upgraded to autoconf 2.x
901 * using -f in combination with -e now works correctly
902 * output can be piped to a program
903 * tracing setuid programs works better
904 * it is now reasonable to install strace setuid to root in some circumstances
905 * new useful tracing names like file and process to trace whole
906 classes of system calls, e.g. -efile traces all system calls that
907 take a file name as an argument
908 * IPC calls on SunOS 4.1.x are decoded
909 * Linux program memory is reliably dereferenced
910 * Linux decodes at least the name of all syscalls as of pre2.0.4
911 * various cosmetic changes and bug fixes
913 Changes from versions 2.x to version 3.0
914 ========================================
916 * filename arguments are neither abbreviated nor stringified
917 * string arguments are now true C strings using octal instead of hex by default
918 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
919 * by default the output for multiple processes now goes into one file
920 * all structures, vectors, bitsets, etc. use consistent output formats
921 * the -c option now means count calls, -i does what the old -c used to do
923 New Features in version 3.0
924 ===========================
926 * non-ascii strings can be optionally printed entirely in hex
927 * the output format is readable when mutiple processes are generating output
928 * exit values are printed in an alignment column
929 * is is possible to suppress messages about attaching and detaching
930 * various tracing features can be enabled on a per syscall/signal/desc basis
931 * selective tracing of syscalls
932 * selective printing of syscall structures
933 * selective abbreviation of long structures on a per syscall basis
934 * selective printing of raw syscall arguments and results
935 * selective tracing of signals
936 * selective dumping of all I/O read from file descriptors
937 * selective dumping of all I/O written to file descriptors
938 * optional counting of time, calls, and errors for each syscall
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