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 * Enhanced decoding of sched_setattr syscall.
12 * Added -e trace=%lstat option for tracing variants of lstat syscall.
13 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
15 * Added -e trace=%%stat option for tracing syscalls used for querying file
16 status information (stat, lstat, fstat, fstatat, statx, and their
18 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
20 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
22 * Added -e trace=%%statfs option for tracing syscalls used for querying file
23 system statistics information (statfs-like, fstatfs-like and ustat).
24 * Added -e trace=/regex option for filtering syscalls using regular
26 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
27 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
28 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
30 * Implemented decoding of statx syscall.
31 * Implemented decoding of NS_* ioctl commands.
32 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
33 * Implemented decoding of NLMSG_ERROR netlink messages.
34 * Updated lists of ioctl commands from Linux 4.11.
37 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
38 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
39 * Fixed decoding of netlink messages received within struct msghdr.
41 Noteworthy changes in release 4.16 (2017-02-14)
42 ===============================================
45 * Implemented syscall return value injection (-e inject=SET:retval= option).
46 * Implemented signal injection (-e inject=SET:signal= option).
47 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
48 * Implemented decoding of all SG_* ioctl commands.
49 * Implemented decoding of ustat syscall.
50 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
51 and BPF_PROG_DETACH commands of bpf syscall.
52 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
53 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
55 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
56 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
57 * Updated lists of ioctl commands from Linux 4.10.
58 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
62 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
63 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
64 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
65 and pwritev* syscalls on x32.
66 * Fixed printing of string arguments of getxattr and setxattr syscalls
67 when -s option is used to limit the printed string size.
68 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
70 * Fixed decoding of SG_* and LOOP_* ioctl commands.
71 * Fixed build on mips with musl libc.
72 * Fixed cross-building of ioctlsort.
73 * Applied minor formatting fixes to the manual page.
75 Noteworthy changes in release 4.15 (2016-12-14)
76 ===============================================
79 * Time stamps are now printed according to ISO 8601.
80 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
81 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
82 syscalls is now formatted as an array.
85 * Implemented syscall fault injection (-e fault=... option).
86 * Implemented decoding of DM_* ioctl commands.
87 * Implemented decoding of attr parameter of perf_event_open syscall.
88 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
89 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
90 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
92 * Implemented PTRACE_GETREGS API support on m68k.
93 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
95 * Updated lists of ioctl commands from Linux 4.9.
96 * Added decoding of recently added syscalls on arc, x32, and xtensa.
97 * Enhanced manual page.
100 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
101 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
102 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
103 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
104 setgroups, setns, unshare, and utimes syscalls.
105 * Fixed handling of verbose flag in printing of controls array
106 of struct v4l2_ext_controls.
107 * Fixed omission of field names in the output of capability, sigaction,
108 sigevent, statfs, timespec, timeval, and utimbuf structures.
109 * Fixed printing of unknown syscalls in siginfo structure.
110 * Fixed decoding of ioctl constants on m68k.
111 * Fixed cris architecture support.
112 * Fixed cross build when host compiler does not support the same
113 set of warning flags as the cross compiler.
114 * Fixed build on SLE10 and SLE11.
116 Noteworthy changes in release 4.14 (2016-10-04)
117 ===============================================
119 * Changes in behavior
120 * When using -p option without a command and no processes has been attached,
121 strace exits with exit status 1.
124 * Added printing of the mode argument of open and openat syscalls
125 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
126 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
127 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
128 and aio family syscalls.
129 * Implemented fetching of the 7th subcall argument on mips o32.
130 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
132 * Updated lists of ioctl commands from Linux 4.8.
133 * Added decoding of new syscalls on sh and sh64.
134 * Added RISC-V architecture support.
137 * Marked io_setup and io_destroy as memory mapping related syscalls.
138 * Fixed leakage of placeholder descriptors to tracees.
139 * Fixed printing of mode_t, umode_t, and umask types.
140 * Fixed decoding of iovec arrays without a limit on total data size.
141 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
142 and ipc family syscalls.
143 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
144 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
146 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
147 * Fixed decoding of struct stat64 on sparc64.
148 * Fixed decoding of uid and gid-related syscalls on sparc64.
149 * Fixed decoding of the forth argument of semctl syscall on sparc64.
150 * Fixed values of tty ioctl constants on sparc64.
151 * Fixed sparc personality support on sparc64.
153 Noteworthy changes in release 4.13 (2016-07-26)
154 ===============================================
157 * Implemented a general netlink socket parser.
158 * Enhanced decoding of socket addresses.
159 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
160 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
161 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
162 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
163 and *_MAGIC constants.
164 * Updated lists of ioctl commands from Linux 4.7.
167 * Fixed decoding of pid_t argument of prlimit64 syscall.
168 * Fixed sign extension issues in the parser of struct rusage.
169 * Fixed race condition in decoding of timeout argument of recvmmsg and
170 rt_sigtimedwait syscalls.
171 * Fixed build with fresh linux kernel headers.
173 Noteworthy changes in release 4.12 (2016-05-31)
174 ===============================================
177 * Implemented simultaneous use of -p option and tracing of a command.
178 (addresses Debian bug #549942).
179 * Implemented caching of netlink conversations to reduce amount of time
180 spent in decoding socket details in -yy mode.
181 * Implemented -yy mode decoding of protocol:portid pairs associated with
182 netlink socket descriptors.
183 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
184 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
186 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
187 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
188 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
189 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
190 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
191 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
192 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
193 statfs64, tgkill, waitid, and xattr family syscalls.
194 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
195 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
196 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
197 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
198 * Added decoding of fadvise64 and fadvise64_64 on s390.
199 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
200 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
201 * Updated lists of ioctl commands from Linux 4.6.
204 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
205 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
206 * Fixed decoding of mlock2 syscall on sparc.
207 * Fixed decoding of osf_shmat syscall on alpha.
208 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
209 (addresses Debian bug #485979 and Fedora bug #1298294).
210 * Fixed decoding of preadv syscall in case of short read.
211 * Fixed decoding and dumping of readv syscall in case of short read.
212 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
213 * Fixed decoding of mincore syscall's last argument.
214 * Fixed remaining errors in mapping between syscall numbers and numbers
215 of syscall arguments.
216 * Applied various fixes to strace-graph script.
218 Noteworthy changes in release 4.11 (2015-12-21)
219 ===============================================
221 * Changes in behavior
222 * Some syscalls have different names depending on architecture and
223 personality. In these cases, syscall filtering and printing now
224 consistently uses the names that match corresponding __NR_* kernel
225 macros of the tracee's architecture and personality.
226 * Added strace prefix to all diagnostic messages.
229 * Enhanced and extended test suite.
230 * Implemented reliable tracing of processes whose personality differs
231 from the personality of strace, fixed decoding of 32-bit personality
232 syscalls on 64-bit architectures.
233 * When some data referenced by syscall arguments is irrelevant or cannot
234 be read from tracee's memory, strace now prints its address consistently.
235 * When a syscall is restarted using restart_syscall mechanism, strace now
236 shows the syscall name on architectures that expose this information.
237 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
238 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
239 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
240 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
241 * Optimized decoding of indirect socket syscalls.
242 * Implemented decoding of nanoseconds along with seconds in stat family
243 syscalls (addresses Fedora bug #1251176).
244 * Implemented decoding of struct statfs.f_flags in statfs syscall.
245 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
247 * Implemented decoding of indirect syscall on mips o32.
248 * Implemented decoding of IPPROTO_IP control messages.
249 * Implemented decoding of setsockopt syscall multicast arguments.
250 * Enhanced decoding of struct sigevent.
251 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
252 and v4l2 ioctl syscall arguments.
253 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
254 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
255 sendfile, setsockopt, and shmctl syscalls.
256 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
257 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
258 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
259 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
260 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
261 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
263 * Added Nios II architecture support.
264 * Added new syscall entries to match Linux 4.4.
267 * Fixed potential short read of strings from tracee's memory.
268 * Fixed -qq option in conjunction with -o option.
269 * Fixed filtering of <unavailable> syscalls.
270 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
271 with 64-bit aligned structures.
272 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
273 syscall flags arguments.
274 * Fixed decoding of 4th argument of clock_nanosleep syscall.
275 * Fixed decoding of getpagesize syscall on m68k.
276 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
277 * Fixed decoding of timezone argument of gettimeofday and settimeofday
279 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
281 * Fixed decoding of pipe syscall on alpha and mips.
282 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
283 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
284 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
286 * Fixed decoding of 4th argument of semctl indirect syscall.
287 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
288 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
289 * Fixed decoding of struct dirent on x32.
290 * Fixed decoding of times syscall return value on mips n32 and x32.
291 * Fixed decoding of path argument of umount2 syscall
292 (addresses Debian bug #785050).
293 * Worked around a kernel bug in tracing privileged executables.
294 * Fixed various errors in mapping between syscall numbers and associated
295 information like the number of syscall arguments, the name of syscall,
298 Noteworthy changes in release 4.10 (2015-03-06)
299 ===============================================
302 * Added -yy option to print protocol and address information associated with
304 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
305 recvmsg, sendmmsg, and recvmmsg syscalls.
306 * Implemented full 32-bit decoding of ioctl commands
307 (addresses Debian bug #692913 and Fedora bug #902788).
308 * Implemented PTRACE_GETREGS API support on ia64.
309 * Implemented PTRACE_GETREGS API support on mips.
310 * Implemented PTRACE_GETREGSET API support on s390/s390x.
311 * Implemented decoding of getrandom and seccomp syscalls.
312 * Implemented full decoding of 64-bit capability sets.
313 * Implemented decoding of all prctl commands.
314 * Implemented decoding of parametrized ioctl commands.
315 * Implemented decoding of evdev ioctl commands.
316 * Implemented decoding of v4l ioctl commands.
317 * Implemented decoding of SG_IO v4 ioctl commands.
318 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
319 * Implemented decoding of FALLOC_FL_* fallocate flags.
320 * Implemented decoding of rt_sigreturn signal mask on aarch64,
322 * Enhanced socket decoder to support bluetooth sockets.
323 * Enhanced decoding of unlisted ioctl commands.
324 * Enhanced decoding of getsockopt and setsockopt syscall.
325 * Enhanced decoding of sysinfo syscall.
326 * Enhanced decoding of struct cmsghdr.
327 * Enhanced decoding of wait status.
328 * Enhanced aio support on non-x86 architectures by using external libaio.h.
329 * Added O_TMPFILE to the list of recognized open mode flags.
330 * Updated the list of filesystem type constants that is used in decoding
331 statfs family syscalls.
332 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
334 * Updated lists of signal constants from Linux 3.19.
335 * Updated lists of errno constants from Linux 3.19.
336 * Updated lists of ioctl commands from Linux 3.9.
337 * Added new syscall entries to match Linux 3.19.
340 * Fixed various errors in mapping between syscall numbers and associated
341 information like the number of syscall arguments, the name of syscall,
343 * Fixed quoting issues in printing descriptors, filenames, network interface
344 names, struct utsname members, device/volume names of BLK* ioctl commands.
345 * Fixed uid_t/git_t decoding.
346 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
347 * Fixed potential open flags truncation on some architectures.
348 * Fixed decoding of struct ifreq.ifr_name.
349 * Fixed decoding of SIOCSIFNAME ioctl command.
350 * Fixed decoding of RENAME_* renameat2 flags.
351 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
352 * Fixed decoding of indirect ipc subcalls on some architectures.
353 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
354 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
355 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
356 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
357 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
358 sparc, sparc64, mips, and s390.
359 * Fixed instruction pointer output (-i option) on architectures that support
360 several personalities.
361 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
363 * Fixed build on systems where struct sigaction has no sa_restorer member.
364 * Fixed build with uclibc and musl libc.
367 * Linux kernel >= 2.5.46 is required.
368 Older versions without a decent PTRACE_SETOPTIONS support will not work.
369 * On mips, linux kernel >= 2.6.15 is required.
370 Older versions without a decent PTRACE_GETREGS support will not work.
371 * On s390 and s390x, linux kernel >= 2.6.27 is required.
372 Older versions without a decent PTRACE_GETREGSET support will not work.
374 Noteworthy changes in release 4.9 (2014-08-15)
375 ==============================================
377 * Changes in behavior
378 * Disabled OABI support on ARM EABI systems by default,
379 added --enable-arm-oabi option to enable it at configure time.
382 * Added experimental -k option to print stack trace after each traced syscall.
383 * Added -w option to produce stats on syscall latency.
384 (addresses Debian bug #457497).
385 * Added ARC architecture support.
386 * Added PTRACE_GETREGS API support on PowerPC.
387 * Enhanced Bionic libc and musl libc support.
388 * Enhanced tracing of x86 personality processes on x86_64 and x32.
389 * Enhanced tracing of ARM personality processes on AArch64.
390 * Enhanced 32/64bit personality detection on PowerPC.
391 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
392 renameat2, and request_key syscalls.
393 * Robustified decoding of select, pselect, and io_submit syscalls.
394 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
395 setdomainname, sethostname, setns, and sync_file_range syscalls.
396 * Enhanced decoding of signal bitmasks.
397 * Enhanced decoding of file descriptors.
398 * Enhanced siginfo_t decoding.
399 * Enhanced PF_NETLINK decoding.
400 * Updated CLOCK_* constants
401 (addresses Fedora bug #1088455).
402 * Added new syscall entries to match Linux 3.16.
405 * Added shmat and shmdt to the set of memory mapping related syscalls.
406 * Fixed detaching from stopped processes.
407 * Fixed fanotify_mark decoding on 32bit architectures.
408 * Fixed offset decoding in preadv and pwritev syscalls.
409 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
410 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
411 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
412 (addresses Fedora bug #993384).
413 * Miscellaneous corrections in the manual page.
414 (Addresses Debian bug #725987).
416 Noteworthy changes in release 4.8 (2013-06-03)
417 ==============================================
419 * Changes in behavior
420 * In case of normal strace termination, when the trace output is
421 redirected to a pipe, strace now closes it and waits for the pipe
422 process termination before exit.
425 * Implemented tracing using PTRACE_SEIZE API (when available).
426 * Implemented more reliable PTRACE_GETREGSET-based process personality
427 detection on x86-64 and x32 (when available).
428 * Added -e trace=memory option for tracing memory mapping related syscalls.
429 * Documented -b option.
430 * Allowed exit status messages to be suppressed by giving -q option twice.
431 * Added AArch64 architecture support
432 (addresses Debian bug #693074 and Fedora bug #969858).
433 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
434 * Added tilegx personality support for Tile.
435 * Enhanced support of NOMMU architectures.
436 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
438 * Added new syscall entries to match Linux 3.9.
439 * Regenerated the list of common ioctl names from Linux 3.9.
440 * Updated the list of errno constants.
441 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
442 PTRACE_O_*, and TCP_* constants.
443 * Implemented decoding of UBI ioctls.
444 * Removed redundant "*32" ioctl names.
447 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
448 (addresses Fedora bug #659382).
449 * Fixed kernel release string parsing
450 (addresses Debian bug #702309).
451 * Fixed decoding of *xattr syscalls
452 (addresses Fedora bug #885233).
453 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
454 (addresses Fedora bug #912790).
455 * Fixed tracing forks on SPARC.
456 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
457 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
458 and truncate64 syscalls.
459 * Fixed categories of multiple syscalls on most of supported architectures.
460 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
461 * Fixed decoding of multiple 32-bit personality syscalls on x32.
462 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
463 S390x, and Tile architectures.
464 * Fixed semtimedop decoding on S390x.
465 * Fixed sram_alloc decoding on Blackfin.
466 * Fixed build when process_vm_readv is a stab.
467 * Fixed build with older versions of libaio.h.
469 Noteworthy changes in release 4.7 (2012-05-02)
470 ==============================================
472 * Changes in behavior
473 * strace no longer suspends waitpid until there is a child
474 for waitpid'ing process to collect status from.
475 * strace no longer detaches from a tracee which is supposed
477 * strace now issues a new message: "+++ exited with EXITCODE +++"
478 which shows exact moment strace got exit notification,
479 analogous to existing "+++ killed by SIG +++" message.
482 * Added x32 personality support (x86_64 architecture).
483 * Added -y and -P options to print file descriptor paths and
484 filter by those paths.
485 * Added -I option to control strace interactivity.
486 * Allowed -p option to take comma or whitespace-separated list of PIDs.
487 * Added strace_log_merge script helper to merge timestamped "strace -ff"
489 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
490 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
491 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
492 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
493 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
494 listxattr, setrlimit and swapon syscalls.
495 * Implemented decoding of loop and mtd ioctls.
496 * Added syscall entries for new linux syscalls.
497 * Added syscall entries for direct socket system calls on powerpc.
498 * Updated the list of errno constants.
499 * Updated lists of MSG_*, STA_*, and TCP_* constants.
500 * Regenerated the list of ioctl names from Linux 3.3.
501 * Enhanced switching between processes with different personalities.
502 * Enhanced signals reporting by using short signal names.
503 * Made ERESTART* messages more descriptive.
504 * Made parsing of numbers from strings more robust.
505 * Added support for compat_statfs64 and statfs64.f_flags.
506 * Changed read of data blocks to use single process_vm_readv syscall
507 (when available) instead of several PTRACE_PEEKDATA operations.
508 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
509 operation instead of several PTRACE_PEEKUSER operations.
510 * Applied various optimizations to make strace work faster.
513 * Implemented proper handling of real SIGTRAPs on kernels supporting
514 PTRACE_O_TRACESYSGOOD.
515 (Addresses Fedora bug #162774).
516 * Fixed sockaddr_un.sun_path name in decoded output.
517 (Addresses Debian bug #554946).
518 * Fixed to avoid potential core file clobbering on exit.
519 (Addresses Debian bug #656398).
520 * Fixed a typo in documentation.
521 (Addresses Debian bug #653309).
522 * Fixed decoding of timer id returned by timer_create.
523 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
524 * Fixed *at syscalls flags decoding.
525 * Fixed ARM EABI 64-bit syscall's arguments decoding.
526 * Fixed semtimedop decoding on s390.
527 * Fixed osf_sigprocmask decoding on alpha.
528 * Fixed ipc and socket subcall decoding on several architectures.
529 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
530 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
531 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
532 * Corrected io_* syscall entries on ARM.
533 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
534 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
535 * Fixed build when libaio-devel is not available.
536 * Fixed configure checks for PTRACE_* constants.
537 * Fixed compilation warnings remained on several architectures.
540 * Removed all non-Linux code. After years of neglect, that dead code
541 just hampered further strace development.
542 * Linux kernel >= 2.6.18 is recommended. Older versions might still
543 work but they haven't been thoroughly tested with this release.
545 Noteworthy changes in release 4.6 (2011-03-15)
546 ==============================================
548 * Changes in behavior
549 * Print diagnostic information about changes in personality mode to
550 standard error instead of standard output.
553 * Implemented a new method of following clone, fork, and vfork
554 syscalls using the Linux kernel's explicit facilities for tracing
555 creation of threads and child processes.
556 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
557 * Implemented decoding of TLS syscalls on m68k.
558 * Implemented biarch support on powerpc64.
559 * Implemented biarch support for getrlimit() and setrlimit().
560 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
561 * Implemented SOL_SCTP socket options decoding.
562 * Added HDIO_* ioctl names.
563 (Addresses Debian bug #450953).
564 * Added LOOP_* ioctl names.
565 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
566 to match Linux 2.6.37.
567 * Updated the list of IPPROTO_* constants to match netinet/in.h.
568 * Implemented decoding of HDIO_* and BLK* ioctls.
569 * Added MicroBlaze architecture support.
570 * Added new syscall entries to match Linux 2.6.37.
571 * Regenerated list of ioctl names from Linux 2.6.37.
572 * Enhanced signal notification decoding.
573 * Documented -C and -D options.
576 * Fixed fetching syscall arguments on m68k.
577 * Fixed an error when judging whether a process has children.
578 * Fixed get/set_robust_list syscall numbers for powerpc.
579 * Fixed a corner case in printing clone flags.
580 * Fixed cross-compiling issues.
581 * Fixed build issues on powerpc64, SH and SPARC.
582 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
583 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
584 fanotify_init, and fanotify_mark syscalls.
585 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
586 * Fixed biarch support in IO dumping.
587 * Fixed raw exit_group decoding.
588 * Fixed decoding of file descriptors on 64-bit architectures.
589 * Fixed a corner case in waitpid handling.
590 (Addresses Red Hat bug #663547).
591 * Fixed stat64 decoding on mips
592 (Addresses Debian bug #599028).
593 * Fixed misleading italics in the manual page.
594 (Addresses Debian bug #589323).
596 Noteworthy changes in release 4.5.20 (2010-04-13)
597 =================================================
600 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
601 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
602 rt_tgsigqueueinfo, perf_event_open.
603 * Enhanced decoding of recently added syscalls on non-x86 architectures
604 by replacing a bare decoder with elaborate parsers enabled earlier
606 * Implemented -C option to combine regular and -c output.
607 (Addresses Debian bug #466196)
608 * Enhanced decoding of mbind and mremap syscalls.
609 * Enhanced SOL_PACKET socket options decoding.
610 * Regenerated list of ioctl names from linux 2.6.33.
611 * Added TILE architecture support.
614 * Fixed build with Linux kernel headers 2.6.32-rc5+.
615 (Addresses Debian bug #560516 and Fedora bug #539044)
616 * Fixed build on mips.
617 * Fixed handling of Linux systems without struct statfs64.
618 * Fixed reporting signal mask by sigreturn on powerpc.
619 * Fixed potential stack buffer overflow in select decoder.
620 (Addresses Fedora bug #556678)
621 * Corrected msgsnd indirect ipccall decoding.
622 * Corrected decoding of 64bit syscalls.
623 (Addresses Debian bug #570603)
624 * Corrected getsockopt decoding on architectures where
625 sizeof(long) > sizeof(int).
626 (Addresses Debian bug #494844)
627 * Corrected decoding of epoll_pwait.
628 (Addresses Debian bug #513014)
629 * Corrected handling of killed threads.
631 Noteworthy changes in release 4.5.19 (2009-10-21)
632 =================================================
634 * Changes in behavior
635 * When command exits, strace now exits with the same exit status.
636 If command is terminated by a signal, strace terminates itself
637 with the same signal, so that strace can be used as a wrapper
638 process transparent to the invoking parent process.
639 When using -p option, the exit status of strace is zero unless
640 there was an unexpected error in doing the tracing.
641 (Addresses Fedora bug #105371 and Debian bug #37665)
644 * Implemented decoding of new Linux syscalls: accept4, dup3,
645 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
646 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
647 * Implemented decoding of accept4 socketcall.
648 * Enhanced prctl decoding.
649 * Enhanced nanosleep decoding.
650 * Enhanced ptrace decoding.
651 * Enhanced futex decoding.
652 * Enhanced CAP_* decoding.
653 * Enhanced SIOCS* ioctls decoding.
654 * Enhanced fcntl F_* flags decoding.
655 * Enhanced semop/semtimedop decoding.
656 * Updated ARM architecture support.
657 * Added Blackfin architecture support.
658 * Added AVR32 architecture support.
659 * Added CRIS architecture support.
660 * Made strace detect when traced process suddenly disappeared.
663 * Fixed syscall numbers for tee and sync_file_range.
664 (Addresses Debian bug #503124)
665 * Fixed several bugs in strings decoder, including potential heap
667 (Addresses Fedora bugs #470529, #478324 and #511035)
668 * Marked sendfile(2) as a network syscall.
669 (Addresses Debian bug #509499)
670 * Fixed accept(2) decoding.
671 (Addresses Debian bug #507573)
672 * Fixed sigtimedwait(2) decoding.
673 * Fixed build on ARM EABI.
674 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
675 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
676 (Addresses Red Hat bug #471169)
677 * Fixed display of 32-bit argv array on 64-bit architectures.
678 (Addresses Fedora bug #519480)
679 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
680 * Fixed HPPA architecture support.
681 (Addresses Debian bugs #437928 and #546619)
686 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
687 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
692 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
693 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
694 * Improved output for prctl system call on Linux.
695 * Improved support for Linux/ARM.
696 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
701 * Improved output for delete_module, futex, and mbind system calls on Linux.
702 * Improved output for SG_IO ioctls on Linux.
703 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
704 eventfd, getcpu, epoll_pwait.
709 * Several biarch improvements.
710 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
711 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
716 * Accept numeric system calls in -e.
721 * Introduce "-e trace=desc".
726 * Better x86-64 support for IA32 processes.
727 * Update PowerPC system calls.
728 * Better printing for Linux aio system calls.
732 * Quick fix release for build issues.
733 * One fix for Linux/ARM system call table.
738 * Print fault address for SIGSEGV/SIGBUS signals when available.
743 * Improve socket ioctl printing.
744 * Update Linux/IA64 syscall list.
745 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
746 * Improve mount flags printing.
747 * Support symbolic printing of x86_64 arch_prctl parameters.
752 * Update syscall tables for Alpha, ARM, HPPA.
753 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
754 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
755 * Improve ioctl command name matching.
756 * Print RTC_* ioctl structure contents.
757 * Support newer RLIMIT_* values.
758 * Print struct cmsghdr details in sendmsg.
763 * Print attribute values in *xattr system calls on Linux.
764 * Include pread and pwrite calls in -e read and -e write tracing.
765 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
766 * Print clock_t values symbolically in Linux clock_* system calls.
770 * Bug fixes, Linux ioctl updates.
771 * David Miller contributed support for Linux/SPARC64.
779 * Update Linux ioctl lists.
780 * Update PF_* and AF_* value lists.
781 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
786 * On Linux using NPTL threads, -p will now attach to all threads in a process.
787 * Handle new mq_* system calls in Linux 2.6.6 and later.
792 * Report some new VM_* bit values on Linux.
793 * Better output for Linux sched_* system calls.
798 * Display multiple ioctl name matches on Linux.
802 * New port to AMD's x86-64 architecture. One strace binary can
803 handle both new x86-64 and old i386 processes.
804 * Fixed support for LFS64 calls.
805 * New switch -E to add/remove environment variables for the command.
806 * Merged s390/s390x port.
807 * Trace an unbounded number of processes.
808 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
809 * Fixed bugs with attach/detach leaving things stopped.
810 * Fixed traced process seeing ECHILD despite live, traced children
811 in waitpid calls with WNOHANG.
812 * Stuart Menefy contributed a port to Linux/SH.
813 * Stephen Thomas contributed a port to Linux/SH64.
814 * Many other bug fixes.
818 * Fix Linux/ia64 support, looks like someone renamed a few things on us
819 * Fix the ioctl setup for Linux, turned out it did not really work.
820 Improve the ioctl extracter as well so we decode some more ones.
824 * compile fixes for Linux/mips
828 * Linux ia64 and hppa ports added
829 * The usual Linux syscall updates (includes 32bit uid/gid support),
830 * Linux ioctl list updated
831 * Support IPv6 scope ids
832 * FreeBSD/i386 port added
833 * UnixWare and Solaris updates
834 * Better support for tracing multithreaded processes in Linux
838 * Compiles on glibc2.0 systems again
839 * Linux/S390 port added
840 * The usual Linux syscall updates
841 * we can follow fork on arm now
845 * Linux/MIPS port added
846 * Lots of Linux updates again
847 * Improved IPv6 support
853 * Compiles on glibc2.0 systems again
857 * Get stat structure properly on Linux 64bit archs
858 * Personalities work again
859 * Compile correctly on SunOS again
865 * Linux (ultra)sparc fixes
872 * add support for more Linux architectures (powerpc, sparc, arm)
873 * support lots more Linux syscalls
874 * fix signal handling
875 * add IPX and IPIP support
876 * check stray syscall after execv
877 * fix hanging children
879 Changes in version 3.1
880 ======================
883 * Linux 68k is supported
884 * Linux alpha is supported
885 * configure is upgraded to autoconf 2.x
886 * using -f in combination with -e now works correctly
887 * output can be piped to a program
888 * tracing setuid programs works better
889 * it is now reasonable to install strace setuid to root in some circumstances
890 * new useful tracing names like file and process to trace whole
891 classes of system calls, e.g. -efile traces all system calls that
892 take a file name as an argument
893 * IPC calls on SunOS 4.1.x are decoded
894 * Linux program memory is reliably dereferenced
895 * Linux decodes at least the name of all syscalls as of pre2.0.4
896 * various cosmetic changes and bug fixes
898 Changes from versions 2.x to version 3.0
899 ========================================
901 * filename arguments are neither abbreviated nor stringified
902 * string arguments are now true C strings using octal instead of hex by default
903 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
904 * by default the output for multiple processes now goes into one file
905 * all structures, vectors, bitsets, etc. use consistent output formats
906 * the -c option now means count calls, -i does what the old -c used to do
908 New Features in version 3.0
909 ===========================
911 * non-ascii strings can be optionally printed entirely in hex
912 * the output format is readable when mutiple processes are generating output
913 * exit values are printed in an alignment column
914 * is is possible to suppress messages about attaching and detaching
915 * various tracing features can be enabled on a per syscall/signal/desc basis
916 * selective tracing of syscalls
917 * selective printing of syscall structures
918 * selective abbreviation of long structures on a per syscall basis
919 * selective printing of raw syscall arguments and results
920 * selective tracing of signals
921 * selective dumping of all I/O read from file descriptors
922 * selective dumping of all I/O written to file descriptors
923 * optional counting of time, calls, and errors for each syscall
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