1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Extended fault injection syntax with signal= and retval= options.
7 Noteworthy changes in release 4.15 (2016-12-14)
8 ===============================================
11 * Time stamps are now printed according to ISO 8601.
12 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
13 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
14 syscalls is now formatted as an array.
17 * Implemented syscall fault injection (-e fault=... option).
18 * Implemented decoding of DM_* ioctl commands.
19 * Implemented decoding of attr parameter of perf_event_open syscall.
20 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
21 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
22 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
24 * Implemented PTRACE_GETREGS API support on m68k.
25 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
27 * Updated lists of ioctl commands from Linux 4.9.
28 * Added decoding of recently added syscalls on arc, x32, and xtensa.
29 * Enhanced manual page.
32 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
33 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
34 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
35 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
36 setgroups, setns, unshare, and utimes syscalls.
37 * Fixed handling of verbose flag in printing of controls array
38 of struct v4l2_ext_controls.
39 * Fixed omission of field names in the output of capability, sigaction,
40 sigevent, statfs, timespec, timeval, and utimbuf structures.
41 * Fixed printing of unknown syscalls in siginfo structure.
42 * Fixed decoding of ioctl constants on m68k.
43 * Fixed cris architecture support.
44 * Fixed cross build when host compiler does not support the same
45 set of warning flags as the cross compiler.
46 * Fixed build on SLE10 and SLE11.
48 Noteworthy changes in release 4.14 (2016-10-04)
49 ===============================================
52 * When using -p option without a command and no processes has been attached,
53 strace exits with exit status 1.
56 * Added printing of the mode argument of open and openat syscalls
57 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
58 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
59 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
60 and aio family syscalls.
61 * Implemented fetching of the 7th subcall argument on mips o32.
62 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
64 * Updated lists of ioctl commands from Linux 4.8.
65 * Added decoding of new syscalls on sh and sh64.
66 * Added RISC-V architecture support.
69 * Marked io_setup and io_destroy as memory mapping related syscalls.
70 * Fixed leakage of placeholder descriptors to tracees.
71 * Fixed printing of mode_t, umode_t, and umask types.
72 * Fixed decoding of iovec arrays without a limit on total data size.
73 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
74 and ipc family syscalls.
75 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
76 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
78 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
79 * Fixed decoding of struct stat64 on sparc64.
80 * Fixed decoding of uid and gid-related syscalls on sparc64.
81 * Fixed decoding of the forth argument of semctl syscall on sparc64.
82 * Fixed values of tty ioctl constants on sparc64.
83 * Fixed sparc personality support on sparc64.
85 Noteworthy changes in release 4.13 (2016-07-26)
86 ===============================================
89 * Implemented a general netlink socket parser.
90 * Enhanced decoding of socket addresses.
91 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
92 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
93 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
94 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
95 and *_MAGIC constants.
96 * Updated lists of ioctl commands from Linux 4.7.
99 * Fixed decoding of pid_t argument of prlimit64 syscall.
100 * Fixed sign extension issues in the parser of struct rusage.
101 * Fixed race condition in decoding of timeout argument of recvmmsg and
102 rt_sigtimedwait syscalls.
103 * Fixed build with fresh linux kernel headers.
105 Noteworthy changes in release 4.12 (2016-05-31)
106 ===============================================
109 * Implemented simultaneous use of -p option and tracing of a command.
110 (addresses Debian bug #549942).
111 * Implemented caching of netlink conversations to reduce amount of time
112 spent in decoding socket details in -yy mode.
113 * Implemented -yy mode decoding of protocol:portid pairs associated with
114 netlink socket descriptors.
115 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
116 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
118 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
119 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
120 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
121 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
122 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
123 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
124 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
125 statfs64, tgkill, waitid, and xattr family syscalls.
126 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
127 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
128 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
129 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
130 * Added decoding of fadvise64 and fadvise64_64 on s390.
131 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
132 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
133 * Updated lists of ioctl commands from Linux 4.6.
136 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
137 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
138 * Fixed decoding of mlock2 syscall on sparc.
139 * Fixed decoding of osf_shmat syscall on alpha.
140 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
141 (addresses Debian bug #485979 and Fedora bug #1298294).
142 * Fixed decoding of preadv syscall in case of short read.
143 * Fixed decoding and dumping of readv syscall in case of short read.
144 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
145 * Fixed decoding of mincore syscall's last argument.
146 * Fixed remaining errors in mapping between syscall numbers and numbers
147 of syscall arguments.
148 * Applied various fixes to strace-graph script.
150 Noteworthy changes in release 4.11 (2015-12-21)
151 ===============================================
153 * Changes in behavior
154 * Some syscalls have different names depending on architecture and
155 personality. In these cases, syscall filtering and printing now
156 consistently uses the names that match corresponding __NR_* kernel
157 macros of the tracee's architecture and personality.
158 * Added strace prefix to all diagnostic messages.
161 * Enhanced and extended test suite.
162 * Implemented reliable tracing of processes whose personality differs
163 from the personality of strace, fixed decoding of 32-bit personality
164 syscalls on 64-bit architectures.
165 * When some data referenced by syscall arguments is irrelevant or cannot
166 be read from tracee's memory, strace now prints its address consistently.
167 * When a syscall is restarted using restart_syscall mechanism, strace now
168 shows the syscall name on architectures that expose this information.
169 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
170 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
171 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
172 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
173 * Optimized decoding of indirect socket syscalls.
174 * Implemented decoding of nanoseconds along with seconds in stat family
175 syscalls (addresses Fedora bug #1251176).
176 * Implemented decoding of struct statfs.f_flags in statfs syscall.
177 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
179 * Implemented decoding of indirect syscall on mips o32.
180 * Implemented decoding of IPPROTO_IP control messages.
181 * Implemented decoding of setsockopt syscall multicast arguments.
182 * Enhanced decoding of struct sigevent.
183 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
184 and v4l2 ioctl syscall arguments.
185 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
186 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
187 sendfile, setsockopt, and shmctl syscalls.
188 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
189 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
190 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
191 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
192 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
193 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
195 * Added Nios II architecture support.
196 * Added new syscall entries to match Linux 4.4.
199 * Fixed potential short read of strings from tracee's memory.
200 * Fixed -qq option in conjunction with -o option.
201 * Fixed filtering of <unavailable> syscalls.
202 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
203 with 64-bit aligned structures.
204 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
205 syscall flags arguments.
206 * Fixed decoding of 4th argument of clock_nanosleep syscall.
207 * Fixed decoding of getpagesize syscall on m68k.
208 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
209 * Fixed decoding of timezone argument of gettimeofday and settimeofday
211 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
213 * Fixed decoding of pipe syscall on alpha and mips.
214 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
215 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
216 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
218 * Fixed decoding of 4th argument of semctl indirect syscall.
219 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
220 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
221 * Fixed decoding of struct dirent on x32.
222 * Fixed decoding of times syscall return value on mips n32 and x32.
223 * Fixed decoding of path argument of umount2 syscall
224 (addresses Debian bug #785050).
225 * Worked around a kernel bug in tracing privileged executables.
226 * Fixed various errors in mapping between syscall numbers and associated
227 information like the number of syscall arguments, the name of syscall,
230 Noteworthy changes in release 4.10 (2015-03-06)
231 ===============================================
234 * Added -yy option to print protocol and address information associated with
236 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
237 recvmsg, sendmmsg, and recvmmsg syscalls.
238 * Implemented full 32-bit decoding of ioctl commands
239 (addresses Debian bug #692913 and Fedora bug #902788).
240 * Implemented PTRACE_GETREGS API support on ia64.
241 * Implemented PTRACE_GETREGS API support on mips.
242 * Implemented PTRACE_GETREGSET API support on s390/s390x.
243 * Implemented decoding of getrandom and seccomp syscalls.
244 * Implemented full decoding of 64-bit capability sets.
245 * Implemented decoding of all prctl commands.
246 * Implemented decoding of parametrized ioctl commands.
247 * Implemented decoding of evdev ioctl commands.
248 * Implemented decoding of v4l ioctl commands.
249 * Implemented decoding of SG_IO v4 ioctl commands.
250 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
251 * Implemented decoding of FALLOC_FL_* fallocate flags.
252 * Implemented decoding of rt_sigreturn signal mask on aarch64,
254 * Enhanced socket decoder to support bluetooth sockets.
255 * Enhanced decoding of unlisted ioctl commands.
256 * Enhanced decoding of getsockopt and setsockopt syscall.
257 * Enhanced decoding of sysinfo syscall.
258 * Enhanced decoding of struct cmsghdr.
259 * Enhanced decoding of wait status.
260 * Enhanced aio support on non-x86 architectures by using external libaio.h.
261 * Added O_TMPFILE to the list of recognized open mode flags.
262 * Updated the list of filesystem type constants that is used in decoding
263 statfs family syscalls.
264 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
266 * Updated lists of signal constants from Linux 3.19.
267 * Updated lists of errno constants from Linux 3.19.
268 * Updated lists of ioctl commands from Linux 3.9.
269 * Added new syscall entries to match Linux 3.19.
272 * Fixed various errors in mapping between syscall numbers and associated
273 information like the number of syscall arguments, the name of syscall,
275 * Fixed quoting issues in printing descriptors, filenames, network interface
276 names, struct utsname members, device/volume names of BLK* ioctl commands.
277 * Fixed uid_t/git_t decoding.
278 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
279 * Fixed potential open flags truncation on some architectures.
280 * Fixed decoding of struct ifreq.ifr_name.
281 * Fixed decoding of SIOCSIFNAME ioctl command.
282 * Fixed decoding of RENAME_* renameat2 flags.
283 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
284 * Fixed decoding of indirect ipc subcalls on some architectures.
285 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
286 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
287 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
288 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
289 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
290 sparc, sparc64, mips, and s390.
291 * Fixed instruction pointer output (-i option) on architectures that support
292 several personalities.
293 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
295 * Fixed build on systems where struct sigaction has no sa_restorer member.
296 * Fixed build with uclibc and musl libc.
299 * Linux kernel >= 2.5.46 is required.
300 Older versions without a decent PTRACE_SETOPTIONS support will not work.
301 * On mips, linux kernel >= 2.6.15 is required.
302 Older versions without a decent PTRACE_GETREGS support will not work.
303 * On s390 and s390x, linux kernel >= 2.6.27 is required.
304 Older versions without a decent PTRACE_GETREGSET support will not work.
306 Noteworthy changes in release 4.9 (2014-08-15)
307 ==============================================
309 * Changes in behavior
310 * Disabled OABI support on ARM EABI systems by default,
311 added --enable-arm-oabi option to enable it at configure time.
314 * Added experimental -k option to print stack trace after each traced syscall.
315 * Added -w option to produce stats on syscall latency.
316 (addresses Debian bug #457497).
317 * Added ARC architecture support.
318 * Added PTRACE_GETREGS API support on PowerPC.
319 * Enhanced Bionic libc and musl libc support.
320 * Enhanced tracing of x86 personality processes on x86_64 and x32.
321 * Enhanced tracing of ARM personality processes on AArch64.
322 * Enhanced 32/64bit personality detection on PowerPC.
323 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
324 renameat2, and request_key syscalls.
325 * Robustified decoding of select, pselect, and io_submit syscalls.
326 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
327 setdomainname, sethostname, setns, and sync_file_range syscalls.
328 * Enhanced decoding of signal bitmasks.
329 * Enhanced decoding of file descriptors.
330 * Enhanced siginfo_t decoding.
331 * Enhanced PF_NETLINK decoding.
332 * Updated CLOCK_* constants
333 (addresses Fedora bug #1088455).
334 * Added new syscall entries to match Linux 3.16.
337 * Added shmat and shmdt to the set of memory mapping related syscalls.
338 * Fixed detaching from stopped processes.
339 * Fixed fanotify_mark decoding on 32bit architectures.
340 * Fixed offset decoding in preadv and pwritev syscalls.
341 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
342 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
343 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
344 (addresses Fedora bug #993384).
345 * Miscellaneous corrections in the manual page.
346 (Addresses Debian bug #725987).
348 Noteworthy changes in release 4.8 (2013-06-03)
349 ==============================================
351 * Changes in behavior
352 * In case of normal strace termination, when the trace output is
353 redirected to a pipe, strace now closes it and waits for the pipe
354 process termination before exit.
357 * Implemented tracing using PTRACE_SEIZE API (when available).
358 * Implemented more reliable PTRACE_GETREGSET-based process personality
359 detection on x86-64 and x32 (when available).
360 * Added -e trace=memory option for tracing memory mapping related syscalls.
361 * Documented -b option.
362 * Allowed exit status messages to be suppressed by giving -q option twice.
363 * Added AArch64 architecture support
364 (addresses Debian bug #693074 and Fedora bug #969858).
365 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
366 * Added tilegx personality support for Tile.
367 * Enhanced support of NOMMU architectures.
368 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
370 * Added new syscall entries to match Linux 3.9.
371 * Regenerated the list of common ioctl names from Linux 3.9.
372 * Updated the list of errno constants.
373 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
374 PTRACE_O_*, and TCP_* constants.
375 * Implemented decoding of UBI ioctls.
376 * Removed redundant "*32" ioctl names.
379 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
380 (addresses Fedora bug #659382).
381 * Fixed kernel release string parsing
382 (addresses Debian bug #702309).
383 * Fixed decoding of *xattr syscalls
384 (addresses Fedora bug #885233).
385 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
386 (addresses Fedora bug #912790).
387 * Fixed tracing forks on SPARC.
388 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
389 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
390 and truncate64 syscalls.
391 * Fixed categories of multiple syscalls on most of supported architectures.
392 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
393 * Fixed decoding of multiple 32-bit personality syscalls on x32.
394 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
395 S390x, and Tile architectures.
396 * Fixed semtimedop decoding on S390x.
397 * Fixed sram_alloc decoding on Blackfin.
398 * Fixed build when process_vm_readv is a stab.
399 * Fixed build with older versions of libaio.h.
401 Noteworthy changes in release 4.7 (2012-05-02)
402 ==============================================
404 * Changes in behavior
405 * strace no longer suspends waitpid until there is a child
406 for waitpid'ing process to collect status from.
407 * strace no longer detaches from a tracee which is supposed
409 * strace now issues a new message: "+++ exited with EXITCODE +++"
410 which shows exact moment strace got exit notification,
411 analogous to existing "+++ killed by SIG +++" message.
414 * Added x32 personality support (x86_64 architecture).
415 * Added -y and -P options to print file descriptor paths and
416 filter by those paths.
417 * Added -I option to control strace interactivity.
418 * Allowed -p option to take comma or whitespace-separated list of PIDs.
419 * Added strace_log_merge script helper to merge timestamped "strace -ff"
421 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
422 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
423 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
424 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
425 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
426 listxattr, setrlimit and swapon syscalls.
427 * Implemented decoding of loop and mtd ioctls.
428 * Added syscall entries for new linux syscalls.
429 * Added syscall entries for direct socket system calls on powerpc.
430 * Updated the list of errno constants.
431 * Updated lists of MSG_*, STA_*, and TCP_* constants.
432 * Regenerated the list of ioctl names from Linux 3.3.
433 * Enhanced switching between processes with different personalities.
434 * Enhanced signals reporting by using short signal names.
435 * Made ERESTART* messages more descriptive.
436 * Made parsing of numbers from strings more robust.
437 * Added support for compat_statfs64 and statfs64.f_flags.
438 * Changed read of data blocks to use single process_vm_readv syscall
439 (when available) instead of several PTRACE_PEEKDATA operations.
440 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
441 operation instead of several PTRACE_PEEKUSER operations.
442 * Applied various optimizations to make strace work faster.
445 * Implemented proper handling of real SIGTRAPs on kernels supporting
446 PTRACE_O_TRACESYSGOOD.
447 (Addresses Fedora bug #162774).
448 * Fixed sockaddr_un.sun_path name in decoded output.
449 (Addresses Debian bug #554946).
450 * Fixed to avoid potential core file clobbering on exit.
451 (Addresses Debian bug #656398).
452 * Fixed a typo in documentation.
453 (Addresses Debian bug #653309).
454 * Fixed decoding of timer id returned by timer_create.
455 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
456 * Fixed *at syscalls flags decoding.
457 * Fixed ARM EABI 64-bit syscall's arguments decoding.
458 * Fixed semtimedop decoding on s390.
459 * Fixed osf_sigprocmask decoding on alpha.
460 * Fixed ipc and socket subcall decoding on several architectures.
461 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
462 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
463 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
464 * Corrected io_* syscall entries on ARM.
465 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
466 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
467 * Fixed build when libaio-devel is not available.
468 * Fixed configure checks for PTRACE_* constants.
469 * Fixed compilation warnings remained on several architectures.
472 * Removed all non-Linux code. After years of neglect, that dead code
473 just hampered further strace development.
474 * Linux kernel >= 2.6.18 is recommended. Older versions might still
475 work but they haven't been thoroughly tested with this release.
477 Noteworthy changes in release 4.6 (2011-03-15)
478 ==============================================
480 * Changes in behavior
481 * Print diagnostic information about changes in personality mode to
482 standard error instead of standard output.
485 * Implemented a new method of following clone, fork, and vfork
486 syscalls using the Linux kernel's explicit facilities for tracing
487 creation of threads and child processes.
488 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
489 * Implemented decoding of TLS syscalls on m68k.
490 * Implemented biarch support on powerpc64.
491 * Implemented biarch support for getrlimit() and setrlimit().
492 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
493 * Implemented SOL_SCTP socket options decoding.
494 * Added HDIO_* ioctl names.
495 (Addresses Debian bug #450953).
496 * Added LOOP_* ioctl names.
497 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
498 to match Linux 2.6.37.
499 * Updated the list of IPPROTO_* constants to match netinet/in.h.
500 * Implemented decoding of HDIO_* and BLK* ioctls.
501 * Added MicroBlaze architecture support.
502 * Added new syscall entries to match Linux 2.6.37.
503 * Regenerated list of ioctl names from Linux 2.6.37.
504 * Enhanced signal notification decoding.
505 * Documented -C and -D options.
508 * Fixed fetching syscall arguments on m68k.
509 * Fixed an error when judging whether a process has children.
510 * Fixed get/set_robust_list syscall numbers for powerpc.
511 * Fixed a corner case in printing clone flags.
512 * Fixed cross-compiling issues.
513 * Fixed build issues on powerpc64, SH and SPARC.
514 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
515 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
516 fanotify_init, and fanotify_mark syscalls.
517 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
518 * Fixed biarch support in IO dumping.
519 * Fixed raw exit_group decoding.
520 * Fixed decoding of file descriptors on 64-bit architectures.
521 * Fixed a corner case in waitpid handling.
522 (Addresses Red Hat bug #663547).
523 * Fixed stat64 decoding on mips
524 (Addresses Debian bug #599028).
525 * Fixed misleading italics in the manual page.
526 (Addresses Debian bug #589323).
528 Noteworthy changes in release 4.5.20 (2010-04-13)
529 =================================================
532 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
533 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
534 rt_tgsigqueueinfo, perf_event_open.
535 * Enhanced decoding of recently added syscalls on non-x86 architectures
536 by replacing a bare decoder with elaborate parsers enabled earlier
538 * Implemented -C option to combine regular and -c output.
539 (Addresses Debian bug #466196)
540 * Enhanced decoding of mbind and mremap syscalls.
541 * Enhanced SOL_PACKET socket options decoding.
542 * Regenerated list of ioctl names from linux 2.6.33.
543 * Added TILE architecture support.
546 * Fixed build with Linux kernel headers 2.6.32-rc5+.
547 (Addresses Debian bug #560516 and Fedora bug #539044)
548 * Fixed build on mips.
549 * Fixed handling of Linux systems without struct statfs64.
550 * Fixed reporting signal mask by sigreturn on powerpc.
551 * Fixed potential stack buffer overflow in select decoder.
552 (Addresses Fedora bug #556678)
553 * Corrected msgsnd indirect ipccall decoding.
554 * Corrected decoding of 64bit syscalls.
555 (Addresses Debian bug #570603)
556 * Corrected getsockopt decoding on architectures where
557 sizeof(long) > sizeof(int).
558 (Addresses Debian bug #494844)
559 * Corrected decoding of epoll_pwait.
560 (Addresses Debian bug #513014)
561 * Corrected handling of killed threads.
563 Noteworthy changes in release 4.5.19 (2009-10-21)
564 =================================================
566 * Changes in behavior
567 * When command exits, strace now exits with the same exit status.
568 If command is terminated by a signal, strace terminates itself
569 with the same signal, so that strace can be used as a wrapper
570 process transparent to the invoking parent process.
571 When using -p option, the exit status of strace is zero unless
572 there was an unexpected error in doing the tracing.
573 (Addresses Fedora bug #105371 and Debian bug #37665)
576 * Implemented decoding of new Linux syscalls: accept4, dup3,
577 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
578 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
579 * Implemented decoding of accept4 socketcall.
580 * Enhanced prctl decoding.
581 * Enhanced nanosleep decoding.
582 * Enhanced ptrace decoding.
583 * Enhanced futex decoding.
584 * Enhanced CAP_* decoding.
585 * Enhanced SIOCS* ioctls decoding.
586 * Enhanced fcntl F_* flags decoding.
587 * Enhanced semop/semtimedop decoding.
588 * Updated ARM architecture support.
589 * Added Blackfin architecture support.
590 * Added AVR32 architecture support.
591 * Added CRIS architecture support.
592 * Made strace detect when traced process suddenly disappeared.
595 * Fixed syscall numbers for tee and sync_file_range.
596 (Addresses Debian bug #503124)
597 * Fixed several bugs in strings decoder, including potential heap
599 (Addresses Fedora bugs #470529, #478324 and #511035)
600 * Marked sendfile(2) as a network syscall.
601 (Addresses Debian bug #509499)
602 * Fixed accept(2) decoding.
603 (Addresses Debian bug #507573)
604 * Fixed sigtimedwait(2) decoding.
605 * Fixed build on ARM EABI.
606 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
607 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
608 (Addresses Red Hat bug #471169)
609 * Fixed display of 32-bit argv array on 64-bit architectures.
610 (Addresses Fedora bug #519480)
611 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
612 * Fixed HPPA architecture support.
613 (Addresses Debian bugs #437928 and #546619)
618 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
619 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
624 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
625 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
626 * Improved output for prctl system call on Linux.
627 * Improved support for Linux/ARM.
628 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
633 * Improved output for delete_module, futex, and mbind system calls on Linux.
634 * Improved output for SG_IO ioctls on Linux.
635 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
636 eventfd, getcpu, epoll_pwait.
641 * Several biarch improvements.
642 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
643 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
648 * Accept numeric system calls in -e.
653 * Introduce "-e trace=desc".
658 * Better x86-64 support for IA32 processes.
659 * Update PowerPC system calls.
660 * Better printing for Linux aio system calls.
664 * Quick fix release for build issues.
665 * One fix for Linux/ARM system call table.
670 * Print fault address for SIGSEGV/SIGBUS signals when available.
675 * Improve socket ioctl printing.
676 * Update Linux/IA64 syscall list.
677 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
678 * Improve mount flags printing.
679 * Support symbolic printing of x86_64 arch_prctl parameters.
684 * Update syscall tables for Alpha, ARM, HPPA.
685 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
686 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
687 * Improve ioctl command name matching.
688 * Print RTC_* ioctl structure contents.
689 * Support newer RLIMIT_* values.
690 * Print struct cmsghdr details in sendmsg.
695 * Print attribute values in *xattr system calls on Linux.
696 * Include pread and pwrite calls in -e read and -e write tracing.
697 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
698 * Print clock_t values symbolically in Linux clock_* system calls.
702 * Bug fixes, Linux ioctl updates.
703 * David Miller contributed support for Linux/SPARC64.
711 * Update Linux ioctl lists.
712 * Update PF_* and AF_* value lists.
713 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
718 * On Linux using NPTL threads, -p will now attach to all threads in a process.
719 * Handle new mq_* system calls in Linux 2.6.6 and later.
724 * Report some new VM_* bit values on Linux.
725 * Better output for Linux sched_* system calls.
730 * Display multiple ioctl name matches on Linux.
734 * New port to AMD's x86-64 architecture. One strace binary can
735 handle both new x86-64 and old i386 processes.
736 * Fixed support for LFS64 calls.
737 * New switch -E to add/remove environment variables for the command.
738 * Merged s390/s390x port.
739 * Trace an unbounded number of processes.
740 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
741 * Fixed bugs with attach/detach leaving things stopped.
742 * Fixed traced process seeing ECHILD despite live, traced children
743 in waitpid calls with WNOHANG.
744 * Stuart Menefy contributed a port to Linux/SH.
745 * Stephen Thomas contributed a port to Linux/SH64.
746 * Many other bug fixes.
750 * Fix Linux/ia64 support, looks like someone renamed a few things on us
751 * Fix the ioctl setup for Linux, turned out it did not really work.
752 Improve the ioctl extracter as well so we decode some more ones.
756 * compile fixes for Linux/mips
760 * Linux ia64 and hppa ports added
761 * The usual Linux syscall updates (includes 32bit uid/gid support),
762 * Linux ioctl list updated
763 * Support IPv6 scope ids
764 * FreeBSD/i386 port added
765 * UnixWare and Solaris updates
766 * Better support for tracing multithreaded processes in Linux
770 * Compiles on glibc2.0 systems again
771 * Linux/S390 port added
772 * The usual Linux syscall updates
773 * we can follow fork on arm now
777 * Linux/MIPS port added
778 * Lots of Linux updates again
779 * Improved IPv6 support
785 * Compiles on glibc2.0 systems again
789 * Get stat structure properly on Linux 64bit archs
790 * Personalities work again
791 * Compile correctly on SunOS again
797 * Linux (ultra)sparc fixes
804 * add support for more Linux architectures (powerpc, sparc, arm)
805 * support lots more Linux syscalls
806 * fix signal handling
807 * add IPX and IPIP support
808 * check stray syscall after execv
809 * fix hanging children
811 Changes in version 3.1
812 ======================
815 * Linux 68k is supported
816 * Linux alpha is supported
817 * configure is upgraded to autoconf 2.x
818 * using -f in combination with -e now works correctly
819 * output can be piped to a program
820 * tracing setuid programs works better
821 * it is now reasonable to install strace setuid to root in some circumstances
822 * new useful tracing names like file and process to trace whole
823 classes of system calls, e.g. -efile traces all system calls that
824 take a file name as an argument
825 * IPC calls on SunOS 4.1.x are decoded
826 * Linux program memory is reliably dereferenced
827 * Linux decodes at least the name of all syscalls as of pre2.0.4
828 * various cosmetic changes and bug fixes
830 Changes from versions 2.x to version 3.0
831 ========================================
833 * filename arguments are neither abbreviated nor stringified
834 * string arguments are now true C strings using octal instead of hex by default
835 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
836 * by default the output for multiple processes now goes into one file
837 * all structures, vectors, bitsets, etc. use consistent output formats
838 * the -c option now means count calls, -i does what the old -c used to do
840 New Features in version 3.0
841 ===========================
843 * non-ascii strings can be optionally printed entirely in hex
844 * the output format is readable when mutiple processes are generating output
845 * exit values are printed in an alignment column
846 * is is possible to suppress messages about attaching and detaching
847 * various tracing features can be enabled on a per syscall/signal/desc basis
848 * selective tracing of syscalls
849 * selective printing of syscall structures
850 * selective abbreviation of long structures on a per syscall basis
851 * selective printing of raw syscall arguments and results
852 * selective tracing of signals
853 * selective dumping of all I/O read from file descriptors
854 * selective dumping of all I/O written to file descriptors
855 * optional counting of time, calls, and errors for each syscall