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 * Enhanced decoding of sched_setattr syscall.
11 * Added -e trace=%sched option for tracing sched_* syscalls.
14 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
16 Noteworthy changes in release 4.16 (2017-02-14)
17 ===============================================
20 * Implemented syscall return value injection (-e inject=SET:retval= option).
21 * Implemented signal injection (-e inject=SET:signal= option).
22 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
23 * Implemented decoding of all SG_* ioctl commands.
24 * Implemented decoding of ustat syscall.
25 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
26 and BPF_PROG_DETACH commands of bpf syscall.
27 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
28 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
30 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
31 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
32 * Updated lists of ioctl commands from Linux 4.10.
33 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
37 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
38 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
39 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
40 and pwritev* syscalls on x32.
41 * Fixed printing of string arguments of getxattr and setxattr syscalls
42 when -s option is used to limit the printed string size.
43 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
45 * Fixed decoding of SG_* and LOOP_* ioctl commands.
46 * Fixed build on mips with musl libc.
47 * Fixed cross-building of ioctlsort.
48 * Applied minor formatting fixes to the manual page.
50 Noteworthy changes in release 4.15 (2016-12-14)
51 ===============================================
54 * Time stamps are now printed according to ISO 8601.
55 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
56 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
57 syscalls is now formatted as an array.
60 * Implemented syscall fault injection (-e fault=... option).
61 * Implemented decoding of DM_* ioctl commands.
62 * Implemented decoding of attr parameter of perf_event_open syscall.
63 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
64 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
65 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
67 * Implemented PTRACE_GETREGS API support on m68k.
68 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
70 * Updated lists of ioctl commands from Linux 4.9.
71 * Added decoding of recently added syscalls on arc, x32, and xtensa.
72 * Enhanced manual page.
75 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
76 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
77 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
78 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
79 setgroups, setns, unshare, and utimes syscalls.
80 * Fixed handling of verbose flag in printing of controls array
81 of struct v4l2_ext_controls.
82 * Fixed omission of field names in the output of capability, sigaction,
83 sigevent, statfs, timespec, timeval, and utimbuf structures.
84 * Fixed printing of unknown syscalls in siginfo structure.
85 * Fixed decoding of ioctl constants on m68k.
86 * Fixed cris architecture support.
87 * Fixed cross build when host compiler does not support the same
88 set of warning flags as the cross compiler.
89 * Fixed build on SLE10 and SLE11.
91 Noteworthy changes in release 4.14 (2016-10-04)
92 ===============================================
95 * When using -p option without a command and no processes has been attached,
96 strace exits with exit status 1.
99 * Added printing of the mode argument of open and openat syscalls
100 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
101 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
102 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
103 and aio family syscalls.
104 * Implemented fetching of the 7th subcall argument on mips o32.
105 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
107 * Updated lists of ioctl commands from Linux 4.8.
108 * Added decoding of new syscalls on sh and sh64.
109 * Added RISC-V architecture support.
112 * Marked io_setup and io_destroy as memory mapping related syscalls.
113 * Fixed leakage of placeholder descriptors to tracees.
114 * Fixed printing of mode_t, umode_t, and umask types.
115 * Fixed decoding of iovec arrays without a limit on total data size.
116 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
117 and ipc family syscalls.
118 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
119 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
121 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
122 * Fixed decoding of struct stat64 on sparc64.
123 * Fixed decoding of uid and gid-related syscalls on sparc64.
124 * Fixed decoding of the forth argument of semctl syscall on sparc64.
125 * Fixed values of tty ioctl constants on sparc64.
126 * Fixed sparc personality support on sparc64.
128 Noteworthy changes in release 4.13 (2016-07-26)
129 ===============================================
132 * Implemented a general netlink socket parser.
133 * Enhanced decoding of socket addresses.
134 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
135 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
136 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
137 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
138 and *_MAGIC constants.
139 * Updated lists of ioctl commands from Linux 4.7.
142 * Fixed decoding of pid_t argument of prlimit64 syscall.
143 * Fixed sign extension issues in the parser of struct rusage.
144 * Fixed race condition in decoding of timeout argument of recvmmsg and
145 rt_sigtimedwait syscalls.
146 * Fixed build with fresh linux kernel headers.
148 Noteworthy changes in release 4.12 (2016-05-31)
149 ===============================================
152 * Implemented simultaneous use of -p option and tracing of a command.
153 (addresses Debian bug #549942).
154 * Implemented caching of netlink conversations to reduce amount of time
155 spent in decoding socket details in -yy mode.
156 * Implemented -yy mode decoding of protocol:portid pairs associated with
157 netlink socket descriptors.
158 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
159 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
161 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
162 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
163 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
164 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
165 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
166 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
167 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
168 statfs64, tgkill, waitid, and xattr family syscalls.
169 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
170 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
171 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
172 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
173 * Added decoding of fadvise64 and fadvise64_64 on s390.
174 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
175 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
176 * Updated lists of ioctl commands from Linux 4.6.
179 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
180 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
181 * Fixed decoding of mlock2 syscall on sparc.
182 * Fixed decoding of osf_shmat syscall on alpha.
183 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
184 (addresses Debian bug #485979 and Fedora bug #1298294).
185 * Fixed decoding of preadv syscall in case of short read.
186 * Fixed decoding and dumping of readv syscall in case of short read.
187 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
188 * Fixed decoding of mincore syscall's last argument.
189 * Fixed remaining errors in mapping between syscall numbers and numbers
190 of syscall arguments.
191 * Applied various fixes to strace-graph script.
193 Noteworthy changes in release 4.11 (2015-12-21)
194 ===============================================
196 * Changes in behavior
197 * Some syscalls have different names depending on architecture and
198 personality. In these cases, syscall filtering and printing now
199 consistently uses the names that match corresponding __NR_* kernel
200 macros of the tracee's architecture and personality.
201 * Added strace prefix to all diagnostic messages.
204 * Enhanced and extended test suite.
205 * Implemented reliable tracing of processes whose personality differs
206 from the personality of strace, fixed decoding of 32-bit personality
207 syscalls on 64-bit architectures.
208 * When some data referenced by syscall arguments is irrelevant or cannot
209 be read from tracee's memory, strace now prints its address consistently.
210 * When a syscall is restarted using restart_syscall mechanism, strace now
211 shows the syscall name on architectures that expose this information.
212 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
213 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
214 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
215 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
216 * Optimized decoding of indirect socket syscalls.
217 * Implemented decoding of nanoseconds along with seconds in stat family
218 syscalls (addresses Fedora bug #1251176).
219 * Implemented decoding of struct statfs.f_flags in statfs syscall.
220 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
222 * Implemented decoding of indirect syscall on mips o32.
223 * Implemented decoding of IPPROTO_IP control messages.
224 * Implemented decoding of setsockopt syscall multicast arguments.
225 * Enhanced decoding of struct sigevent.
226 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
227 and v4l2 ioctl syscall arguments.
228 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
229 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
230 sendfile, setsockopt, and shmctl syscalls.
231 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
232 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
233 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
234 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
235 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
236 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
238 * Added Nios II architecture support.
239 * Added new syscall entries to match Linux 4.4.
242 * Fixed potential short read of strings from tracee's memory.
243 * Fixed -qq option in conjunction with -o option.
244 * Fixed filtering of <unavailable> syscalls.
245 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
246 with 64-bit aligned structures.
247 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
248 syscall flags arguments.
249 * Fixed decoding of 4th argument of clock_nanosleep syscall.
250 * Fixed decoding of getpagesize syscall on m68k.
251 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
252 * Fixed decoding of timezone argument of gettimeofday and settimeofday
254 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
256 * Fixed decoding of pipe syscall on alpha and mips.
257 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
258 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
259 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
261 * Fixed decoding of 4th argument of semctl indirect syscall.
262 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
263 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
264 * Fixed decoding of struct dirent on x32.
265 * Fixed decoding of times syscall return value on mips n32 and x32.
266 * Fixed decoding of path argument of umount2 syscall
267 (addresses Debian bug #785050).
268 * Worked around a kernel bug in tracing privileged executables.
269 * Fixed various errors in mapping between syscall numbers and associated
270 information like the number of syscall arguments, the name of syscall,
273 Noteworthy changes in release 4.10 (2015-03-06)
274 ===============================================
277 * Added -yy option to print protocol and address information associated with
279 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
280 recvmsg, sendmmsg, and recvmmsg syscalls.
281 * Implemented full 32-bit decoding of ioctl commands
282 (addresses Debian bug #692913 and Fedora bug #902788).
283 * Implemented PTRACE_GETREGS API support on ia64.
284 * Implemented PTRACE_GETREGS API support on mips.
285 * Implemented PTRACE_GETREGSET API support on s390/s390x.
286 * Implemented decoding of getrandom and seccomp syscalls.
287 * Implemented full decoding of 64-bit capability sets.
288 * Implemented decoding of all prctl commands.
289 * Implemented decoding of parametrized ioctl commands.
290 * Implemented decoding of evdev ioctl commands.
291 * Implemented decoding of v4l ioctl commands.
292 * Implemented decoding of SG_IO v4 ioctl commands.
293 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
294 * Implemented decoding of FALLOC_FL_* fallocate flags.
295 * Implemented decoding of rt_sigreturn signal mask on aarch64,
297 * Enhanced socket decoder to support bluetooth sockets.
298 * Enhanced decoding of unlisted ioctl commands.
299 * Enhanced decoding of getsockopt and setsockopt syscall.
300 * Enhanced decoding of sysinfo syscall.
301 * Enhanced decoding of struct cmsghdr.
302 * Enhanced decoding of wait status.
303 * Enhanced aio support on non-x86 architectures by using external libaio.h.
304 * Added O_TMPFILE to the list of recognized open mode flags.
305 * Updated the list of filesystem type constants that is used in decoding
306 statfs family syscalls.
307 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
309 * Updated lists of signal constants from Linux 3.19.
310 * Updated lists of errno constants from Linux 3.19.
311 * Updated lists of ioctl commands from Linux 3.9.
312 * Added new syscall entries to match Linux 3.19.
315 * Fixed various errors in mapping between syscall numbers and associated
316 information like the number of syscall arguments, the name of syscall,
318 * Fixed quoting issues in printing descriptors, filenames, network interface
319 names, struct utsname members, device/volume names of BLK* ioctl commands.
320 * Fixed uid_t/git_t decoding.
321 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
322 * Fixed potential open flags truncation on some architectures.
323 * Fixed decoding of struct ifreq.ifr_name.
324 * Fixed decoding of SIOCSIFNAME ioctl command.
325 * Fixed decoding of RENAME_* renameat2 flags.
326 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
327 * Fixed decoding of indirect ipc subcalls on some architectures.
328 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
329 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
330 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
331 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
332 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
333 sparc, sparc64, mips, and s390.
334 * Fixed instruction pointer output (-i option) on architectures that support
335 several personalities.
336 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
338 * Fixed build on systems where struct sigaction has no sa_restorer member.
339 * Fixed build with uclibc and musl libc.
342 * Linux kernel >= 2.5.46 is required.
343 Older versions without a decent PTRACE_SETOPTIONS support will not work.
344 * On mips, linux kernel >= 2.6.15 is required.
345 Older versions without a decent PTRACE_GETREGS support will not work.
346 * On s390 and s390x, linux kernel >= 2.6.27 is required.
347 Older versions without a decent PTRACE_GETREGSET support will not work.
349 Noteworthy changes in release 4.9 (2014-08-15)
350 ==============================================
352 * Changes in behavior
353 * Disabled OABI support on ARM EABI systems by default,
354 added --enable-arm-oabi option to enable it at configure time.
357 * Added experimental -k option to print stack trace after each traced syscall.
358 * Added -w option to produce stats on syscall latency.
359 (addresses Debian bug #457497).
360 * Added ARC architecture support.
361 * Added PTRACE_GETREGS API support on PowerPC.
362 * Enhanced Bionic libc and musl libc support.
363 * Enhanced tracing of x86 personality processes on x86_64 and x32.
364 * Enhanced tracing of ARM personality processes on AArch64.
365 * Enhanced 32/64bit personality detection on PowerPC.
366 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
367 renameat2, and request_key syscalls.
368 * Robustified decoding of select, pselect, and io_submit syscalls.
369 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
370 setdomainname, sethostname, setns, and sync_file_range syscalls.
371 * Enhanced decoding of signal bitmasks.
372 * Enhanced decoding of file descriptors.
373 * Enhanced siginfo_t decoding.
374 * Enhanced PF_NETLINK decoding.
375 * Updated CLOCK_* constants
376 (addresses Fedora bug #1088455).
377 * Added new syscall entries to match Linux 3.16.
380 * Added shmat and shmdt to the set of memory mapping related syscalls.
381 * Fixed detaching from stopped processes.
382 * Fixed fanotify_mark decoding on 32bit architectures.
383 * Fixed offset decoding in preadv and pwritev syscalls.
384 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
385 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
386 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
387 (addresses Fedora bug #993384).
388 * Miscellaneous corrections in the manual page.
389 (Addresses Debian bug #725987).
391 Noteworthy changes in release 4.8 (2013-06-03)
392 ==============================================
394 * Changes in behavior
395 * In case of normal strace termination, when the trace output is
396 redirected to a pipe, strace now closes it and waits for the pipe
397 process termination before exit.
400 * Implemented tracing using PTRACE_SEIZE API (when available).
401 * Implemented more reliable PTRACE_GETREGSET-based process personality
402 detection on x86-64 and x32 (when available).
403 * Added -e trace=memory option for tracing memory mapping related syscalls.
404 * Documented -b option.
405 * Allowed exit status messages to be suppressed by giving -q option twice.
406 * Added AArch64 architecture support
407 (addresses Debian bug #693074 and Fedora bug #969858).
408 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
409 * Added tilegx personality support for Tile.
410 * Enhanced support of NOMMU architectures.
411 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
413 * Added new syscall entries to match Linux 3.9.
414 * Regenerated the list of common ioctl names from Linux 3.9.
415 * Updated the list of errno constants.
416 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
417 PTRACE_O_*, and TCP_* constants.
418 * Implemented decoding of UBI ioctls.
419 * Removed redundant "*32" ioctl names.
422 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
423 (addresses Fedora bug #659382).
424 * Fixed kernel release string parsing
425 (addresses Debian bug #702309).
426 * Fixed decoding of *xattr syscalls
427 (addresses Fedora bug #885233).
428 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
429 (addresses Fedora bug #912790).
430 * Fixed tracing forks on SPARC.
431 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
432 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
433 and truncate64 syscalls.
434 * Fixed categories of multiple syscalls on most of supported architectures.
435 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
436 * Fixed decoding of multiple 32-bit personality syscalls on x32.
437 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
438 S390x, and Tile architectures.
439 * Fixed semtimedop decoding on S390x.
440 * Fixed sram_alloc decoding on Blackfin.
441 * Fixed build when process_vm_readv is a stab.
442 * Fixed build with older versions of libaio.h.
444 Noteworthy changes in release 4.7 (2012-05-02)
445 ==============================================
447 * Changes in behavior
448 * strace no longer suspends waitpid until there is a child
449 for waitpid'ing process to collect status from.
450 * strace no longer detaches from a tracee which is supposed
452 * strace now issues a new message: "+++ exited with EXITCODE +++"
453 which shows exact moment strace got exit notification,
454 analogous to existing "+++ killed by SIG +++" message.
457 * Added x32 personality support (x86_64 architecture).
458 * Added -y and -P options to print file descriptor paths and
459 filter by those paths.
460 * Added -I option to control strace interactivity.
461 * Allowed -p option to take comma or whitespace-separated list of PIDs.
462 * Added strace_log_merge script helper to merge timestamped "strace -ff"
464 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
465 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
466 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
467 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
468 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
469 listxattr, setrlimit and swapon syscalls.
470 * Implemented decoding of loop and mtd ioctls.
471 * Added syscall entries for new linux syscalls.
472 * Added syscall entries for direct socket system calls on powerpc.
473 * Updated the list of errno constants.
474 * Updated lists of MSG_*, STA_*, and TCP_* constants.
475 * Regenerated the list of ioctl names from Linux 3.3.
476 * Enhanced switching between processes with different personalities.
477 * Enhanced signals reporting by using short signal names.
478 * Made ERESTART* messages more descriptive.
479 * Made parsing of numbers from strings more robust.
480 * Added support for compat_statfs64 and statfs64.f_flags.
481 * Changed read of data blocks to use single process_vm_readv syscall
482 (when available) instead of several PTRACE_PEEKDATA operations.
483 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
484 operation instead of several PTRACE_PEEKUSER operations.
485 * Applied various optimizations to make strace work faster.
488 * Implemented proper handling of real SIGTRAPs on kernels supporting
489 PTRACE_O_TRACESYSGOOD.
490 (Addresses Fedora bug #162774).
491 * Fixed sockaddr_un.sun_path name in decoded output.
492 (Addresses Debian bug #554946).
493 * Fixed to avoid potential core file clobbering on exit.
494 (Addresses Debian bug #656398).
495 * Fixed a typo in documentation.
496 (Addresses Debian bug #653309).
497 * Fixed decoding of timer id returned by timer_create.
498 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
499 * Fixed *at syscalls flags decoding.
500 * Fixed ARM EABI 64-bit syscall's arguments decoding.
501 * Fixed semtimedop decoding on s390.
502 * Fixed osf_sigprocmask decoding on alpha.
503 * Fixed ipc and socket subcall decoding on several architectures.
504 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
505 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
506 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
507 * Corrected io_* syscall entries on ARM.
508 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
509 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
510 * Fixed build when libaio-devel is not available.
511 * Fixed configure checks for PTRACE_* constants.
512 * Fixed compilation warnings remained on several architectures.
515 * Removed all non-Linux code. After years of neglect, that dead code
516 just hampered further strace development.
517 * Linux kernel >= 2.6.18 is recommended. Older versions might still
518 work but they haven't been thoroughly tested with this release.
520 Noteworthy changes in release 4.6 (2011-03-15)
521 ==============================================
523 * Changes in behavior
524 * Print diagnostic information about changes in personality mode to
525 standard error instead of standard output.
528 * Implemented a new method of following clone, fork, and vfork
529 syscalls using the Linux kernel's explicit facilities for tracing
530 creation of threads and child processes.
531 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
532 * Implemented decoding of TLS syscalls on m68k.
533 * Implemented biarch support on powerpc64.
534 * Implemented biarch support for getrlimit() and setrlimit().
535 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
536 * Implemented SOL_SCTP socket options decoding.
537 * Added HDIO_* ioctl names.
538 (Addresses Debian bug #450953).
539 * Added LOOP_* ioctl names.
540 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
541 to match Linux 2.6.37.
542 * Updated the list of IPPROTO_* constants to match netinet/in.h.
543 * Implemented decoding of HDIO_* and BLK* ioctls.
544 * Added MicroBlaze architecture support.
545 * Added new syscall entries to match Linux 2.6.37.
546 * Regenerated list of ioctl names from Linux 2.6.37.
547 * Enhanced signal notification decoding.
548 * Documented -C and -D options.
551 * Fixed fetching syscall arguments on m68k.
552 * Fixed an error when judging whether a process has children.
553 * Fixed get/set_robust_list syscall numbers for powerpc.
554 * Fixed a corner case in printing clone flags.
555 * Fixed cross-compiling issues.
556 * Fixed build issues on powerpc64, SH and SPARC.
557 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
558 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
559 fanotify_init, and fanotify_mark syscalls.
560 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
561 * Fixed biarch support in IO dumping.
562 * Fixed raw exit_group decoding.
563 * Fixed decoding of file descriptors on 64-bit architectures.
564 * Fixed a corner case in waitpid handling.
565 (Addresses Red Hat bug #663547).
566 * Fixed stat64 decoding on mips
567 (Addresses Debian bug #599028).
568 * Fixed misleading italics in the manual page.
569 (Addresses Debian bug #589323).
571 Noteworthy changes in release 4.5.20 (2010-04-13)
572 =================================================
575 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
576 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
577 rt_tgsigqueueinfo, perf_event_open.
578 * Enhanced decoding of recently added syscalls on non-x86 architectures
579 by replacing a bare decoder with elaborate parsers enabled earlier
581 * Implemented -C option to combine regular and -c output.
582 (Addresses Debian bug #466196)
583 * Enhanced decoding of mbind and mremap syscalls.
584 * Enhanced SOL_PACKET socket options decoding.
585 * Regenerated list of ioctl names from linux 2.6.33.
586 * Added TILE architecture support.
589 * Fixed build with Linux kernel headers 2.6.32-rc5+.
590 (Addresses Debian bug #560516 and Fedora bug #539044)
591 * Fixed build on mips.
592 * Fixed handling of Linux systems without struct statfs64.
593 * Fixed reporting signal mask by sigreturn on powerpc.
594 * Fixed potential stack buffer overflow in select decoder.
595 (Addresses Fedora bug #556678)
596 * Corrected msgsnd indirect ipccall decoding.
597 * Corrected decoding of 64bit syscalls.
598 (Addresses Debian bug #570603)
599 * Corrected getsockopt decoding on architectures where
600 sizeof(long) > sizeof(int).
601 (Addresses Debian bug #494844)
602 * Corrected decoding of epoll_pwait.
603 (Addresses Debian bug #513014)
604 * Corrected handling of killed threads.
606 Noteworthy changes in release 4.5.19 (2009-10-21)
607 =================================================
609 * Changes in behavior
610 * When command exits, strace now exits with the same exit status.
611 If command is terminated by a signal, strace terminates itself
612 with the same signal, so that strace can be used as a wrapper
613 process transparent to the invoking parent process.
614 When using -p option, the exit status of strace is zero unless
615 there was an unexpected error in doing the tracing.
616 (Addresses Fedora bug #105371 and Debian bug #37665)
619 * Implemented decoding of new Linux syscalls: accept4, dup3,
620 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
621 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
622 * Implemented decoding of accept4 socketcall.
623 * Enhanced prctl decoding.
624 * Enhanced nanosleep decoding.
625 * Enhanced ptrace decoding.
626 * Enhanced futex decoding.
627 * Enhanced CAP_* decoding.
628 * Enhanced SIOCS* ioctls decoding.
629 * Enhanced fcntl F_* flags decoding.
630 * Enhanced semop/semtimedop decoding.
631 * Updated ARM architecture support.
632 * Added Blackfin architecture support.
633 * Added AVR32 architecture support.
634 * Added CRIS architecture support.
635 * Made strace detect when traced process suddenly disappeared.
638 * Fixed syscall numbers for tee and sync_file_range.
639 (Addresses Debian bug #503124)
640 * Fixed several bugs in strings decoder, including potential heap
642 (Addresses Fedora bugs #470529, #478324 and #511035)
643 * Marked sendfile(2) as a network syscall.
644 (Addresses Debian bug #509499)
645 * Fixed accept(2) decoding.
646 (Addresses Debian bug #507573)
647 * Fixed sigtimedwait(2) decoding.
648 * Fixed build on ARM EABI.
649 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
650 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
651 (Addresses Red Hat bug #471169)
652 * Fixed display of 32-bit argv array on 64-bit architectures.
653 (Addresses Fedora bug #519480)
654 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
655 * Fixed HPPA architecture support.
656 (Addresses Debian bugs #437928 and #546619)
661 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
662 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
667 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
668 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
669 * Improved output for prctl system call on Linux.
670 * Improved support for Linux/ARM.
671 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
676 * Improved output for delete_module, futex, and mbind system calls on Linux.
677 * Improved output for SG_IO ioctls on Linux.
678 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
679 eventfd, getcpu, epoll_pwait.
684 * Several biarch improvements.
685 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
686 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
691 * Accept numeric system calls in -e.
696 * Introduce "-e trace=desc".
701 * Better x86-64 support for IA32 processes.
702 * Update PowerPC system calls.
703 * Better printing for Linux aio system calls.
707 * Quick fix release for build issues.
708 * One fix for Linux/ARM system call table.
713 * Print fault address for SIGSEGV/SIGBUS signals when available.
718 * Improve socket ioctl printing.
719 * Update Linux/IA64 syscall list.
720 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
721 * Improve mount flags printing.
722 * Support symbolic printing of x86_64 arch_prctl parameters.
727 * Update syscall tables for Alpha, ARM, HPPA.
728 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
729 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
730 * Improve ioctl command name matching.
731 * Print RTC_* ioctl structure contents.
732 * Support newer RLIMIT_* values.
733 * Print struct cmsghdr details in sendmsg.
738 * Print attribute values in *xattr system calls on Linux.
739 * Include pread and pwrite calls in -e read and -e write tracing.
740 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
741 * Print clock_t values symbolically in Linux clock_* system calls.
745 * Bug fixes, Linux ioctl updates.
746 * David Miller contributed support for Linux/SPARC64.
754 * Update Linux ioctl lists.
755 * Update PF_* and AF_* value lists.
756 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
761 * On Linux using NPTL threads, -p will now attach to all threads in a process.
762 * Handle new mq_* system calls in Linux 2.6.6 and later.
767 * Report some new VM_* bit values on Linux.
768 * Better output for Linux sched_* system calls.
773 * Display multiple ioctl name matches on Linux.
777 * New port to AMD's x86-64 architecture. One strace binary can
778 handle both new x86-64 and old i386 processes.
779 * Fixed support for LFS64 calls.
780 * New switch -E to add/remove environment variables for the command.
781 * Merged s390/s390x port.
782 * Trace an unbounded number of processes.
783 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
784 * Fixed bugs with attach/detach leaving things stopped.
785 * Fixed traced process seeing ECHILD despite live, traced children
786 in waitpid calls with WNOHANG.
787 * Stuart Menefy contributed a port to Linux/SH.
788 * Stephen Thomas contributed a port to Linux/SH64.
789 * Many other bug fixes.
793 * Fix Linux/ia64 support, looks like someone renamed a few things on us
794 * Fix the ioctl setup for Linux, turned out it did not really work.
795 Improve the ioctl extracter as well so we decode some more ones.
799 * compile fixes for Linux/mips
803 * Linux ia64 and hppa ports added
804 * The usual Linux syscall updates (includes 32bit uid/gid support),
805 * Linux ioctl list updated
806 * Support IPv6 scope ids
807 * FreeBSD/i386 port added
808 * UnixWare and Solaris updates
809 * Better support for tracing multithreaded processes in Linux
813 * Compiles on glibc2.0 systems again
814 * Linux/S390 port added
815 * The usual Linux syscall updates
816 * we can follow fork on arm now
820 * Linux/MIPS port added
821 * Lots of Linux updates again
822 * Improved IPv6 support
828 * Compiles on glibc2.0 systems again
832 * Get stat structure properly on Linux 64bit archs
833 * Personalities work again
834 * Compile correctly on SunOS again
840 * Linux (ultra)sparc fixes
847 * add support for more Linux architectures (powerpc, sparc, arm)
848 * support lots more Linux syscalls
849 * fix signal handling
850 * add IPX and IPIP support
851 * check stray syscall after execv
852 * fix hanging children
854 Changes in version 3.1
855 ======================
858 * Linux 68k is supported
859 * Linux alpha is supported
860 * configure is upgraded to autoconf 2.x
861 * using -f in combination with -e now works correctly
862 * output can be piped to a program
863 * tracing setuid programs works better
864 * it is now reasonable to install strace setuid to root in some circumstances
865 * new useful tracing names like file and process to trace whole
866 classes of system calls, e.g. -efile traces all system calls that
867 take a file name as an argument
868 * IPC calls on SunOS 4.1.x are decoded
869 * Linux program memory is reliably dereferenced
870 * Linux decodes at least the name of all syscalls as of pre2.0.4
871 * various cosmetic changes and bug fixes
873 Changes from versions 2.x to version 3.0
874 ========================================
876 * filename arguments are neither abbreviated nor stringified
877 * string arguments are now true C strings using octal instead of hex by default
878 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
879 * by default the output for multiple processes now goes into one file
880 * all structures, vectors, bitsets, etc. use consistent output formats
881 * the -c option now means count calls, -i does what the old -c used to do
883 New Features in version 3.0
884 ===========================
886 * non-ascii strings can be optionally printed entirely in hex
887 * the output format is readable when mutiple processes are generating output
888 * exit values are printed in an alignment column
889 * is is possible to suppress messages about attaching and detaching
890 * various tracing features can be enabled on a per syscall/signal/desc basis
891 * selective tracing of syscalls
892 * selective printing of syscall structures
893 * selective abbreviation of long structures on a per syscall basis
894 * selective printing of raw syscall arguments and results
895 * selective tracing of signals
896 * selective dumping of all I/O read from file descriptors
897 * selective dumping of all I/O written to file descriptors
898 * optional counting of time, calls, and errors for each syscall
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