1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Implemented simultaneous use of -p option and tracing of a command.
6 (addresses Debian bug #549942).
7 * Enhanced decoding of personality, sched_getaffinity,
8 and sched_setaffinity syscalls.
9 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
10 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
13 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
14 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
15 * Fixed decoding of mlock2 syscall on sparc.
16 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
17 (addresses Debian bug #485979 and Fedora bug #1298294).
18 * Fixed decoding and dumping of readv syscall in case of short read.
19 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
21 Noteworthy changes in release 4.11 (2015-12-21)
22 ===============================================
25 * Some syscalls have different names depending on architecture and
26 personality. In these cases, syscall filtering and printing now
27 consistently uses the names that match corresponding __NR_* kernel
28 macros of the tracee's architecture and personality.
29 * Added strace prefix to all diagnostic messages.
32 * Enhanced and extended test suite.
33 * Implemented reliable tracing of processes whose personality differs
34 from the personality of strace, fixed decoding of 32-bit personality
35 syscalls on 64-bit architectures.
36 * When some data referenced by syscall arguments is irrelevant or cannot
37 be read from tracee's memory, strace now prints its address consistently.
38 * When a syscall is restarted using restart_syscall mechanism, strace now
39 shows the syscall name on architectures that expose this information.
40 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
41 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
42 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
43 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
44 * Optimized decoding of indirect socket syscalls.
45 * Implemented decoding of nanoseconds along with seconds in stat family
46 syscalls (addresses Fedora bug #1251176).
47 * Implemented decoding of struct statfs.f_flags in statfs syscall.
48 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
50 * Implemented decoding of indirect syscall on mips o32.
51 * Implemented decoding of IPPROTO_IP control messages.
52 * Implemented decoding of setsockopt syscall multicast arguments.
53 * Enhanced decoding of struct sigevent.
54 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
55 and v4l2 ioctl syscall arguments.
56 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
57 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
58 sendfile, setsockopt, and shmctl syscalls.
59 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
60 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
61 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
62 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
63 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
64 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
66 * Added Nios II architecture support.
67 * Added new syscall entries to match Linux 4.4.
70 * Fixed potential short read of strings from tracee's memory.
71 * Fixed -qq option in conjunction with -o option.
72 * Fixed filtering of <unavailable> syscalls.
73 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
74 with 64-bit aligned structures.
75 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
76 syscall flags arguments.
77 * Fixed decoding of 4th argument of clock_nanosleep syscall.
78 * Fixed decoding of getpagesize syscall on m68k.
79 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
80 * Fixed decoding of timezone argument of gettimeofday and settimeofday
82 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
84 * Fixed decoding of pipe syscall on alpha and mips.
85 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
86 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
87 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
89 * Fixed decoding of 4th argument of semctl indirect syscall.
90 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
91 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
92 * Fixed decoding of struct dirent on x32.
93 * Fixed decoding of times syscall return value on mips n32 and x32.
94 * Fixed decoding of path argument of umount2 syscall
95 (addresses Debian bug #785050).
96 * Worked around a kernel bug in tracing privileged executables.
97 * Fixed various errors in mapping between syscall numbers and associated
98 information like the number of syscall arguments, the name of syscall,
101 Noteworthy changes in release 4.10 (2015-03-06)
102 ===============================================
105 * Added -yy option to print protocol and address information associated with
107 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
108 recvmsg, sendmmsg, and recvmmsg syscalls.
109 * Implemented full 32-bit decoding of ioctl commands
110 (addresses Debian bug #692913 and Fedora bug #902788).
111 * Implemented PTRACE_GETREGS API support on ia64.
112 * Implemented PTRACE_GETREGS API support on mips.
113 * Implemented PTRACE_GETREGSET API support on s390/s390x.
114 * Implemented decoding of getrandom and seccomp syscalls.
115 * Implemented full decoding of 64-bit capability sets.
116 * Implemented decoding of all prctl commands.
117 * Implemented decoding of parametrized ioctl commands.
118 * Implemented decoding of evdev ioctl commands.
119 * Implemented decoding of v4l ioctl commands.
120 * Implemented decoding of SG_IO v4 ioctl commands.
121 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
122 * Implemented decoding of FALLOC_FL_* fallocate flags.
123 * Implemented decoding of rt_sigreturn signal mask on aarch64,
125 * Enhanced socket decoder to support bluetooth sockets.
126 * Enhanced decoding of unlisted ioctl commands.
127 * Enhanced decoding of getsockopt and setsockopt syscall.
128 * Enhanced decoding of sysinfo syscall.
129 * Enhanced decoding of struct cmsghdr.
130 * Enhanced decoding of wait status.
131 * Enhanced aio support on non-x86 architectures by using external libaio.h.
132 * Added O_TMPFILE to the list of recognized open mode flags.
133 * Updated the list of filesystem type constants that is used in decoding
134 statfs family syscalls.
135 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
137 * Updated lists of signal constants from Linux 3.19.
138 * Updated lists of errno constants from Linux 3.19.
139 * Updated lists of ioctl commands from Linux 3.9.
140 * Added new syscall entries to match Linux 3.19.
143 * Fixed various errors in mapping between syscall numbers and associated
144 information like the number of syscall arguments, the name of syscall,
146 * Fixed quoting issues in printing descriptors, filenames, network interface
147 names, struct utsname members, device/volume names of BLK* ioctl commands.
148 * Fixed uid_t/git_t decoding.
149 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
150 * Fixed potential open flags truncation on some architectures.
151 * Fixed decoding of struct ifreq.ifr_name.
152 * Fixed decoding of SIOCSIFNAME ioctl command.
153 * Fixed decoding of RENAME_* renameat2 flags.
154 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
155 * Fixed decoding of indirect ipc subcalls on some architectures.
156 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
157 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
158 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
159 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
160 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
161 sparc, sparc64, mips, and s390.
162 * Fixed instruction pointer output (-i option) on architectures that support
163 several personalities.
164 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
166 * Fixed build on systems where struct sigaction has no sa_restorer member.
167 * Fixed build with uclibc and musl libc.
170 * Linux kernel >= 2.5.46 is required.
171 Older versions without a decent PTRACE_SETOPTIONS support will not work.
172 * On mips, linux kernel >= 2.6.15 is required.
173 Older versions without a decent PTRACE_GETREGS support will not work.
174 * On s390 and s390x, linux kernel >= 2.6.27 is required.
175 Older versions without a decent PTRACE_GETREGSET support will not work.
177 Noteworthy changes in release 4.9 (2014-08-15)
178 ==============================================
180 * Changes in behavior
181 * Disabled OABI support on ARM EABI systems by default,
182 added --enable-arm-oabi option to enable it at configure time.
185 * Added experimental -k option to print stack trace after each traced syscall.
186 * Added -w option to produce stats on syscall latency.
187 (addresses Debian bug #457497).
188 * Added ARC architecture support.
189 * Added PTRACE_GETREGS API support on PowerPC.
190 * Enhanced Bionic libc and musl libc support.
191 * Enhanced tracing of x86 personality processes on x86_64 and x32.
192 * Enhanced tracing of ARM personality processes on AArch64.
193 * Enhanced 32/64bit personality detection on PowerPC.
194 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
195 renameat2, and request_key syscalls.
196 * Robustified decoding of select, pselect, and io_submit syscalls.
197 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
198 setdomainname, sethostname, setns, and sync_file_range syscalls.
199 * Enhanced decoding of signal bitmasks.
200 * Enhanced decoding of file descriptors.
201 * Enhanced siginfo_t decoding.
202 * Enhanced PF_NETLINK decoding.
203 * Updated CLOCK_* constants
204 (addresses Fedora bug #1088455).
205 * Added new syscall entries to match Linux 3.16.
208 * Added shmat and shmdt to the set of memory mapping related syscalls.
209 * Fixed detaching from stopped processes.
210 * Fixed fanotify_mark decoding on 32bit architectures.
211 * Fixed offset decoding in preadv and pwritev syscalls.
212 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
213 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
214 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
215 (addresses Fedora bug #993384).
216 * Miscellaneous corrections in the manual page.
217 (Addresses Debian bug #725987).
219 Noteworthy changes in release 4.8 (2013-06-03)
220 ==============================================
222 * Changes in behavior
223 * In case of normal strace termination, when the trace output is
224 redirected to a pipe, strace now closes it and waits for the pipe
225 process termination before exit.
228 * Implemented tracing using PTRACE_SEIZE API (when available).
229 * Implemented more reliable PTRACE_GETREGSET-based process personality
230 detection on x86-64 and x32 (when available).
231 * Added -e trace=memory option for tracing memory mapping related syscalls.
232 * Documented -b option.
233 * Allowed exit status messages to be suppressed by giving -q option twice.
234 * Added AArch64 architecture support
235 (addresses Debian bug #693074 and Fedora bug #969858).
236 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
237 * Added tilegx personality support for Tile.
238 * Enhanced support of NOMMU architectures.
239 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
241 * Added new syscall entries to match Linux 3.9.
242 * Regenerated the list of common ioctl names from Linux 3.9.
243 * Updated the list of errno constants.
244 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
245 PTRACE_O_*, and TCP_* constants.
246 * Implemented decoding of UBI ioctls.
247 * Removed redundant "*32" ioctl names.
250 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
251 (addresses Fedora bug #659382).
252 * Fixed kernel release string parsing
253 (addresses Debian bug #702309).
254 * Fixed decoding of *xattr syscalls
255 (addresses Fedora bug #885233).
256 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
257 (addresses Fedora bug #912790).
258 * Fixed tracing forks on SPARC.
259 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
260 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
261 and truncate64 syscalls.
262 * Fixed categories of multiple syscalls on most of supported architectures.
263 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
264 * Fixed decoding of multiple 32-bit personality syscalls on x32.
265 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
266 S390x, and Tile architectures.
267 * Fixed semtimedop decoding on S390x.
268 * Fixed sram_alloc decoding on Blackfin.
269 * Fixed build when process_vm_readv is a stab.
270 * Fixed build with older versions of libaio.h.
272 Noteworthy changes in release 4.7 (2012-05-02)
273 ==============================================
275 * Changes in behavior
276 * strace no longer suspends waitpid until there is a child
277 for waitpid'ing process to collect status from.
278 * strace no longer detaches from a tracee which is supposed
280 * strace now issues a new message: "+++ exited with EXITCODE +++"
281 which shows exact moment strace got exit notification,
282 analogous to existing "+++ killed by SIG +++" message.
285 * Added x32 personality support (x86_64 architecture).
286 * Added -y and -P options to print file descriptor paths and
287 filter by those paths.
288 * Added -I option to control strace interactivity.
289 * Allowed -p option to take comma or whitespace-separated list of PIDs.
290 * Added strace_log_merge script helper to merge timestamped "strace -ff"
292 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
293 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
294 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
295 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
296 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
297 listxattr, setrlimit and swapon syscalls.
298 * Implemented decoding of loop and mtd ioctls.
299 * Added syscall entries for new linux syscalls.
300 * Added syscall entries for direct socket system calls on powerpc.
301 * Updated the list of errno constants.
302 * Updated lists of MSG_*, STA_*, and TCP_* constants.
303 * Regenerated the list of ioctl names from Linux 3.3.
304 * Enhanced switching between processes with different personalities.
305 * Enhanced signals reporting by using short signal names.
306 * Made ERESTART* messages more descriptive.
307 * Made parsing of numbers from strings more robust.
308 * Added support for compat_statfs64 and statfs64.f_flags.
309 * Changed read of data blocks to use single process_vm_readv syscall
310 (when available) instead of several PTRACE_PEEKDATA operations.
311 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
312 operation instead of several PTRACE_PEEKUSER operations.
313 * Applied various optimizations to make strace work faster.
316 * Implemented proper handling of real SIGTRAPs on kernels supporting
317 PTRACE_O_TRACESYSGOOD.
318 (Addresses Fedora bug #162774).
319 * Fixed sockaddr_un.sun_path name in decoded output.
320 (Addresses Debian bug #554946).
321 * Fixed to avoid potential core file clobbering on exit.
322 (Addresses Debian bug #656398).
323 * Fixed a typo in documentation.
324 (Addresses Debian bug #653309).
325 * Fixed decoding of timer id returned by timer_create.
326 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
327 * Fixed *at syscalls flags decoding.
328 * Fixed ARM EABI 64-bit syscall's arguments decoding.
329 * Fixed semtimedop decoding on s390.
330 * Fixed osf_sigprocmask decoding on alpha.
331 * Fixed ipc and socket subcall decoding on several architectures.
332 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
333 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
334 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
335 * Corrected io_* syscall entries on ARM.
336 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
337 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
338 * Fixed build when libaio-devel is not available.
339 * Fixed configure checks for PTRACE_* constants.
340 * Fixed compilation warnings remained on several architectures.
343 * Removed all non-Linux code. After years of neglect, that dead code
344 just hampered further strace development.
345 * Linux kernel >= 2.6.18 is recommended. Older versions might still
346 work but they haven't been thoroughly tested with this release.
348 Noteworthy changes in release 4.6 (2011-03-15)
349 ==============================================
351 * Changes in behavior
352 * Print diagnostic information about changes in personality mode to
353 standard error instead of standard output.
356 * Implemented a new method of following clone, fork, and vfork
357 syscalls using the Linux kernel's explicit facilities for tracing
358 creation of threads and child processes.
359 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
360 * Implemented decoding of TLS syscalls on m68k.
361 * Implemented biarch support on powerpc64.
362 * Implemented biarch support for getrlimit() and setrlimit().
363 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
364 * Implemented SOL_SCTP socket options decoding.
365 * Added HDIO_* ioctl names.
366 (Addresses Debian bug #450953).
367 * Added LOOP_* ioctl names.
368 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
369 to match Linux 2.6.37.
370 * Updated the list of IPPROTO_* constants to match netinet/in.h.
371 * Implemented decoding of HDIO_* and BLK* ioctls.
372 * Added MicroBlaze architecture support.
373 * Added new syscall entries to match Linux 2.6.37.
374 * Regenerated list of ioctl names from Linux 2.6.37.
375 * Enhanced signal notification decoding.
376 * Documented -C and -D options.
379 * Fixed fetching syscall arguments on m68k.
380 * Fixed an error when judging whether a process has children.
381 * Fixed get/set_robust_list syscall numbers for powerpc.
382 * Fixed a corner case in printing clone flags.
383 * Fixed cross-compiling issues.
384 * Fixed build issues on powerpc64, SH and SPARC.
385 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
386 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
387 fanotify_init, and fanotify_mark syscalls.
388 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
389 * Fixed biarch support in IO dumping.
390 * Fixed raw exit_group decoding.
391 * Fixed decoding of file descriptors on 64-bit architectures.
392 * Fixed a corner case in waitpid handling.
393 (Addresses Red Hat bug #663547).
394 * Fixed stat64 decoding on mips
395 (Addresses Debian bug #599028).
396 * Fixed misleading italics in the manual page.
397 (Addresses Debian bug #589323).
399 Noteworthy changes in release 4.5.20 (2010-04-13)
400 =================================================
403 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
404 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
405 rt_tgsigqueueinfo, perf_event_open.
406 * Enhanced decoding of recently added syscalls on non-x86 architectures
407 by replacing a bare decoder with elaborate parsers enabled earlier
409 * Implemented -C option to combine regular and -c output.
410 (Addresses Debian bug #466196)
411 * Enhanced decoding of mbind and mremap syscalls.
412 * Enhanced SOL_PACKET socket options decoding.
413 * Regenerated list of ioctl names from linux 2.6.33.
414 * Added TILE architecture support.
417 * Fixed build with Linux kernel headers 2.6.32-rc5+.
418 (Addresses Debian bug #560516 and Fedora bug #539044)
419 * Fixed build on mips.
420 * Fixed handling of Linux systems without struct statfs64.
421 * Fixed reporting signal mask by sigreturn on powerpc.
422 * Fixed potential stack buffer overflow in select decoder.
423 (Addresses Fedora bug #556678)
424 * Corrected msgsnd indirect ipccall decoding.
425 * Corrected decoding of 64bit syscalls.
426 (Addresses Debian bug #570603)
427 * Corrected getsockopt decoding on architectures where
428 sizeof(long) > sizeof(int).
429 (Addresses Debian bug #494844)
430 * Corrected decoding of epoll_pwait.
431 (Addresses Debian bug #513014)
432 * Corrected handling of killed threads.
434 Noteworthy changes in release 4.5.19 (2009-10-21)
435 =================================================
437 * Changes in behavior
438 * When command exits, strace now exits with the same exit status.
439 If command is terminated by a signal, strace terminates itself
440 with the same signal, so that strace can be used as a wrapper
441 process transparent to the invoking parent process.
442 When using -p option, the exit status of strace is zero unless
443 there was an unexpected error in doing the tracing.
444 (Addresses Fedora bug #105371 and Debian bug #37665)
447 * Implemented decoding of new Linux syscalls: accept4, dup3,
448 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
449 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
450 * Implemented decoding of accept4 socketcall.
451 * Enhanced prctl decoding.
452 * Enhanced nanosleep decoding.
453 * Enhanced ptrace decoding.
454 * Enhanced futex decoding.
455 * Enhanced CAP_* decoding.
456 * Enhanced SIOCS* ioctls decoding.
457 * Enhanced fcntl F_* flags decoding.
458 * Enhanced semop/semtimedop decoding.
459 * Updated ARM architecture support.
460 * Added Blackfin architecture support.
461 * Added AVR32 architecture support.
462 * Added CRIS architecture support.
463 * Made strace detect when traced process suddenly disappeared.
466 * Fixed syscall numbers for tee and sync_file_range.
467 (Addresses Debian bug #503124)
468 * Fixed several bugs in strings decoder, including potential heap
470 (Addresses Fedora bugs #470529, #478324 and #511035)
471 * Marked sendfile(2) as a network syscall.
472 (Addresses Debian bug #509499)
473 * Fixed accept(2) decoding.
474 (Addresses Debian bug #507573)
475 * Fixed sigtimedwait(2) decoding.
476 * Fixed build on ARM EABI.
477 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
478 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
479 (Addresses Red Hat bug #471169)
480 * Fixed display of 32-bit argv array on 64-bit architectures.
481 (Addresses Fedora bug #519480)
482 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
483 * Fixed HPPA architecture support.
484 (Addresses Debian bugs #437928 and #546619)
489 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
490 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
495 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
496 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
497 * Improved output for prctl system call on Linux.
498 * Improved support for Linux/ARM.
499 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
504 * Improved output for delete_module, futex, and mbind system calls on Linux.
505 * Improved output for SG_IO ioctls on Linux.
506 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
507 eventfd, getcpu, epoll_pwait.
512 * Several biarch improvements.
513 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
514 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
519 * Accept numeric system calls in -e.
524 * Introduce "-e trace=desc".
529 * Better x86-64 support for IA32 processes.
530 * Update PowerPC system calls.
531 * Better printing for Linux aio system calls.
535 * Quick fix release for build issues.
536 * One fix for Linux/ARM system call table.
541 * Print fault address for SIGSEGV/SIGBUS signals when available.
546 * Improve socket ioctl printing.
547 * Update Linux/IA64 syscall list.
548 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
549 * Improve mount flags printing.
550 * Support symbolic printing of x86_64 arch_prctl parameters.
555 * Update syscall tables for Alpha, ARM, HPPA.
556 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
557 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
558 * Improve ioctl command name matching.
559 * Print RTC_* ioctl structure contents.
560 * Support newer RLIMIT_* values.
561 * Print struct cmsghdr details in sendmsg.
566 * Print attribute values in *xattr system calls on Linux.
567 * Include pread and pwrite calls in -e read and -e write tracing.
568 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
569 * Print clock_t values symbolically in Linux clock_* system calls.
573 * Bug fixes, Linux ioctl updates.
574 * David Miller contributed support for Linux/SPARC64.
582 * Update Linux ioctl lists.
583 * Update PF_* and AF_* value lists.
584 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
589 * On Linux using NPTL threads, -p will now attach to all threads in a process.
590 * Handle new mq_* system calls in Linux 2.6.6 and later.
595 * Report some new VM_* bit values on Linux.
596 * Better output for Linux sched_* system calls.
601 * Display multiple ioctl name matches on Linux.
605 * New port to AMD's x86-64 architecture. One strace binary can
606 handle both new x86-64 and old i386 processes.
607 * Fixed support for LFS64 calls.
608 * New switch -E to add/remove environment variables for the command.
609 * Merged s390/s390x port.
610 * Trace an unbounded number of processes.
611 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
612 * Fixed bugs with attach/detach leaving things stopped.
613 * Fixed traced process seeing ECHILD despite live, traced children
614 in waitpid calls with WNOHANG.
615 * Stuart Menefy contributed a port to Linux/SH.
616 * Stephen Thomas contributed a port to Linux/SH64.
617 * Many other bug fixes.
621 * Fix Linux/ia64 support, looks like someone renamed a few things on us
622 * Fix the ioctl setup for Linux, turned out it did not really work.
623 Improve the ioctl extracter as well so we decode some more ones.
627 * compile fixes for Linux/mips
631 * Linux ia64 and hppa ports added
632 * The usual Linux syscall updates (includes 32bit uid/gid support),
633 * Linux ioctl list updated
634 * Support IPv6 scope ids
635 * FreeBSD/i386 port added
636 * UnixWare and Solaris updates
637 * Better support for tracing multithreaded processes in Linux
641 * Compiles on glibc2.0 systems again
642 * Linux/S390 port added
643 * The usual Linux syscall updates
644 * we can follow fork on arm now
648 * Linux/MIPS port added
649 * Lots of Linux updates again
650 * Improved IPv6 support
656 * Compiles on glibc2.0 systems again
660 * Get stat structure properly on Linux 64bit archs
661 * Personalities work again
662 * Compile correctly on SunOS again
668 * Linux (ultra)sparc fixes
675 * add support for more Linux architectures (powerpc, sparc, arm)
676 * support lots more Linux syscalls
677 * fix signal handling
678 * add IPX and IPIP support
679 * check stray syscall after execv
680 * fix hanging children
682 Changes in version 3.1
683 ======================
686 * Linux 68k is supported
687 * Linux alpha is supported
688 * configure is upgraded to autoconf 2.x
689 * using -f in combination with -e now works correctly
690 * output can be piped to a program
691 * tracing setuid programs works better
692 * it is now reasonable to install strace setuid to root in some circumstances
693 * new useful tracing names like file and process to trace whole
694 classes of system calls, e.g. -efile traces all system calls that
695 take a file name as an argument
696 * IPC calls on SunOS 4.1.x are decoded
697 * Linux program memory is reliably dereferenced
698 * Linux decodes at least the name of all syscalls as of pre2.0.4
699 * various cosmetic changes and bug fixes
701 Changes from versions 2.x to version 3.0
702 ========================================
704 * filename arguments are neither abbreviated nor stringified
705 * string arguments are now true C strings using octal instead of hex by default
706 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
707 * by default the output for multiple processes now goes into one file
708 * all structures, vectors, bitsets, etc. use consistent output formats
709 * the -c option now means count calls, -i does what the old -c used to do
711 New Features in version 3.0
712 ===========================
714 * non-ascii strings can be optionally printed entirely in hex
715 * the output format is readable when mutiple processes are generating output
716 * exit values are printed in an alignment column
717 * is is possible to suppress messages about attaching and detaching
718 * various tracing features can be enabled on a per syscall/signal/desc basis
719 * selective tracing of syscalls
720 * selective printing of syscall structures
721 * selective abbreviation of long structures on a per syscall basis
722 * selective printing of raw syscall arguments and results
723 * selective tracing of signals
724 * selective dumping of all I/O read from file descriptors
725 * selective dumping of all I/O written to file descriptors
726 * optional counting of time, calls, and errors for each syscall
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