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.
20 * Fixed decoding of mincore syscall's last argument.
22 Noteworthy changes in release 4.11 (2015-12-21)
23 ===============================================
26 * Some syscalls have different names depending on architecture and
27 personality. In these cases, syscall filtering and printing now
28 consistently uses the names that match corresponding __NR_* kernel
29 macros of the tracee's architecture and personality.
30 * Added strace prefix to all diagnostic messages.
33 * Enhanced and extended test suite.
34 * Implemented reliable tracing of processes whose personality differs
35 from the personality of strace, fixed decoding of 32-bit personality
36 syscalls on 64-bit architectures.
37 * When some data referenced by syscall arguments is irrelevant or cannot
38 be read from tracee's memory, strace now prints its address consistently.
39 * When a syscall is restarted using restart_syscall mechanism, strace now
40 shows the syscall name on architectures that expose this information.
41 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
42 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
43 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
44 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
45 * Optimized decoding of indirect socket syscalls.
46 * Implemented decoding of nanoseconds along with seconds in stat family
47 syscalls (addresses Fedora bug #1251176).
48 * Implemented decoding of struct statfs.f_flags in statfs syscall.
49 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
51 * Implemented decoding of indirect syscall on mips o32.
52 * Implemented decoding of IPPROTO_IP control messages.
53 * Implemented decoding of setsockopt syscall multicast arguments.
54 * Enhanced decoding of struct sigevent.
55 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
56 and v4l2 ioctl syscall arguments.
57 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
58 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
59 sendfile, setsockopt, and shmctl syscalls.
60 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
61 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
62 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
63 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
64 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
65 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
67 * Added Nios II architecture support.
68 * Added new syscall entries to match Linux 4.4.
71 * Fixed potential short read of strings from tracee's memory.
72 * Fixed -qq option in conjunction with -o option.
73 * Fixed filtering of <unavailable> syscalls.
74 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
75 with 64-bit aligned structures.
76 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
77 syscall flags arguments.
78 * Fixed decoding of 4th argument of clock_nanosleep syscall.
79 * Fixed decoding of getpagesize syscall on m68k.
80 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
81 * Fixed decoding of timezone argument of gettimeofday and settimeofday
83 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
85 * Fixed decoding of pipe syscall on alpha and mips.
86 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
87 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
88 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
90 * Fixed decoding of 4th argument of semctl indirect syscall.
91 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
92 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
93 * Fixed decoding of struct dirent on x32.
94 * Fixed decoding of times syscall return value on mips n32 and x32.
95 * Fixed decoding of path argument of umount2 syscall
96 (addresses Debian bug #785050).
97 * Worked around a kernel bug in tracing privileged executables.
98 * Fixed various errors in mapping between syscall numbers and associated
99 information like the number of syscall arguments, the name of syscall,
102 Noteworthy changes in release 4.10 (2015-03-06)
103 ===============================================
106 * Added -yy option to print protocol and address information associated with
108 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
109 recvmsg, sendmmsg, and recvmmsg syscalls.
110 * Implemented full 32-bit decoding of ioctl commands
111 (addresses Debian bug #692913 and Fedora bug #902788).
112 * Implemented PTRACE_GETREGS API support on ia64.
113 * Implemented PTRACE_GETREGS API support on mips.
114 * Implemented PTRACE_GETREGSET API support on s390/s390x.
115 * Implemented decoding of getrandom and seccomp syscalls.
116 * Implemented full decoding of 64-bit capability sets.
117 * Implemented decoding of all prctl commands.
118 * Implemented decoding of parametrized ioctl commands.
119 * Implemented decoding of evdev ioctl commands.
120 * Implemented decoding of v4l ioctl commands.
121 * Implemented decoding of SG_IO v4 ioctl commands.
122 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
123 * Implemented decoding of FALLOC_FL_* fallocate flags.
124 * Implemented decoding of rt_sigreturn signal mask on aarch64,
126 * Enhanced socket decoder to support bluetooth sockets.
127 * Enhanced decoding of unlisted ioctl commands.
128 * Enhanced decoding of getsockopt and setsockopt syscall.
129 * Enhanced decoding of sysinfo syscall.
130 * Enhanced decoding of struct cmsghdr.
131 * Enhanced decoding of wait status.
132 * Enhanced aio support on non-x86 architectures by using external libaio.h.
133 * Added O_TMPFILE to the list of recognized open mode flags.
134 * Updated the list of filesystem type constants that is used in decoding
135 statfs family syscalls.
136 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
138 * Updated lists of signal constants from Linux 3.19.
139 * Updated lists of errno constants from Linux 3.19.
140 * Updated lists of ioctl commands from Linux 3.9.
141 * Added new syscall entries to match Linux 3.19.
144 * Fixed various errors in mapping between syscall numbers and associated
145 information like the number of syscall arguments, the name of syscall,
147 * Fixed quoting issues in printing descriptors, filenames, network interface
148 names, struct utsname members, device/volume names of BLK* ioctl commands.
149 * Fixed uid_t/git_t decoding.
150 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
151 * Fixed potential open flags truncation on some architectures.
152 * Fixed decoding of struct ifreq.ifr_name.
153 * Fixed decoding of SIOCSIFNAME ioctl command.
154 * Fixed decoding of RENAME_* renameat2 flags.
155 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
156 * Fixed decoding of indirect ipc subcalls on some architectures.
157 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
158 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
159 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
160 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
161 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
162 sparc, sparc64, mips, and s390.
163 * Fixed instruction pointer output (-i option) on architectures that support
164 several personalities.
165 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
167 * Fixed build on systems where struct sigaction has no sa_restorer member.
168 * Fixed build with uclibc and musl libc.
171 * Linux kernel >= 2.5.46 is required.
172 Older versions without a decent PTRACE_SETOPTIONS support will not work.
173 * On mips, linux kernel >= 2.6.15 is required.
174 Older versions without a decent PTRACE_GETREGS support will not work.
175 * On s390 and s390x, linux kernel >= 2.6.27 is required.
176 Older versions without a decent PTRACE_GETREGSET support will not work.
178 Noteworthy changes in release 4.9 (2014-08-15)
179 ==============================================
181 * Changes in behavior
182 * Disabled OABI support on ARM EABI systems by default,
183 added --enable-arm-oabi option to enable it at configure time.
186 * Added experimental -k option to print stack trace after each traced syscall.
187 * Added -w option to produce stats on syscall latency.
188 (addresses Debian bug #457497).
189 * Added ARC architecture support.
190 * Added PTRACE_GETREGS API support on PowerPC.
191 * Enhanced Bionic libc and musl libc support.
192 * Enhanced tracing of x86 personality processes on x86_64 and x32.
193 * Enhanced tracing of ARM personality processes on AArch64.
194 * Enhanced 32/64bit personality detection on PowerPC.
195 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
196 renameat2, and request_key syscalls.
197 * Robustified decoding of select, pselect, and io_submit syscalls.
198 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
199 setdomainname, sethostname, setns, and sync_file_range syscalls.
200 * Enhanced decoding of signal bitmasks.
201 * Enhanced decoding of file descriptors.
202 * Enhanced siginfo_t decoding.
203 * Enhanced PF_NETLINK decoding.
204 * Updated CLOCK_* constants
205 (addresses Fedora bug #1088455).
206 * Added new syscall entries to match Linux 3.16.
209 * Added shmat and shmdt to the set of memory mapping related syscalls.
210 * Fixed detaching from stopped processes.
211 * Fixed fanotify_mark decoding on 32bit architectures.
212 * Fixed offset decoding in preadv and pwritev syscalls.
213 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
214 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
215 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
216 (addresses Fedora bug #993384).
217 * Miscellaneous corrections in the manual page.
218 (Addresses Debian bug #725987).
220 Noteworthy changes in release 4.8 (2013-06-03)
221 ==============================================
223 * Changes in behavior
224 * In case of normal strace termination, when the trace output is
225 redirected to a pipe, strace now closes it and waits for the pipe
226 process termination before exit.
229 * Implemented tracing using PTRACE_SEIZE API (when available).
230 * Implemented more reliable PTRACE_GETREGSET-based process personality
231 detection on x86-64 and x32 (when available).
232 * Added -e trace=memory option for tracing memory mapping related syscalls.
233 * Documented -b option.
234 * Allowed exit status messages to be suppressed by giving -q option twice.
235 * Added AArch64 architecture support
236 (addresses Debian bug #693074 and Fedora bug #969858).
237 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
238 * Added tilegx personality support for Tile.
239 * Enhanced support of NOMMU architectures.
240 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
242 * Added new syscall entries to match Linux 3.9.
243 * Regenerated the list of common ioctl names from Linux 3.9.
244 * Updated the list of errno constants.
245 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
246 PTRACE_O_*, and TCP_* constants.
247 * Implemented decoding of UBI ioctls.
248 * Removed redundant "*32" ioctl names.
251 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
252 (addresses Fedora bug #659382).
253 * Fixed kernel release string parsing
254 (addresses Debian bug #702309).
255 * Fixed decoding of *xattr syscalls
256 (addresses Fedora bug #885233).
257 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
258 (addresses Fedora bug #912790).
259 * Fixed tracing forks on SPARC.
260 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
261 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
262 and truncate64 syscalls.
263 * Fixed categories of multiple syscalls on most of supported architectures.
264 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
265 * Fixed decoding of multiple 32-bit personality syscalls on x32.
266 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
267 S390x, and Tile architectures.
268 * Fixed semtimedop decoding on S390x.
269 * Fixed sram_alloc decoding on Blackfin.
270 * Fixed build when process_vm_readv is a stab.
271 * Fixed build with older versions of libaio.h.
273 Noteworthy changes in release 4.7 (2012-05-02)
274 ==============================================
276 * Changes in behavior
277 * strace no longer suspends waitpid until there is a child
278 for waitpid'ing process to collect status from.
279 * strace no longer detaches from a tracee which is supposed
281 * strace now issues a new message: "+++ exited with EXITCODE +++"
282 which shows exact moment strace got exit notification,
283 analogous to existing "+++ killed by SIG +++" message.
286 * Added x32 personality support (x86_64 architecture).
287 * Added -y and -P options to print file descriptor paths and
288 filter by those paths.
289 * Added -I option to control strace interactivity.
290 * Allowed -p option to take comma or whitespace-separated list of PIDs.
291 * Added strace_log_merge script helper to merge timestamped "strace -ff"
293 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
294 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
295 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
296 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
297 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
298 listxattr, setrlimit and swapon syscalls.
299 * Implemented decoding of loop and mtd ioctls.
300 * Added syscall entries for new linux syscalls.
301 * Added syscall entries for direct socket system calls on powerpc.
302 * Updated the list of errno constants.
303 * Updated lists of MSG_*, STA_*, and TCP_* constants.
304 * Regenerated the list of ioctl names from Linux 3.3.
305 * Enhanced switching between processes with different personalities.
306 * Enhanced signals reporting by using short signal names.
307 * Made ERESTART* messages more descriptive.
308 * Made parsing of numbers from strings more robust.
309 * Added support for compat_statfs64 and statfs64.f_flags.
310 * Changed read of data blocks to use single process_vm_readv syscall
311 (when available) instead of several PTRACE_PEEKDATA operations.
312 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
313 operation instead of several PTRACE_PEEKUSER operations.
314 * Applied various optimizations to make strace work faster.
317 * Implemented proper handling of real SIGTRAPs on kernels supporting
318 PTRACE_O_TRACESYSGOOD.
319 (Addresses Fedora bug #162774).
320 * Fixed sockaddr_un.sun_path name in decoded output.
321 (Addresses Debian bug #554946).
322 * Fixed to avoid potential core file clobbering on exit.
323 (Addresses Debian bug #656398).
324 * Fixed a typo in documentation.
325 (Addresses Debian bug #653309).
326 * Fixed decoding of timer id returned by timer_create.
327 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
328 * Fixed *at syscalls flags decoding.
329 * Fixed ARM EABI 64-bit syscall's arguments decoding.
330 * Fixed semtimedop decoding on s390.
331 * Fixed osf_sigprocmask decoding on alpha.
332 * Fixed ipc and socket subcall decoding on several architectures.
333 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
334 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
335 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
336 * Corrected io_* syscall entries on ARM.
337 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
338 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
339 * Fixed build when libaio-devel is not available.
340 * Fixed configure checks for PTRACE_* constants.
341 * Fixed compilation warnings remained on several architectures.
344 * Removed all non-Linux code. After years of neglect, that dead code
345 just hampered further strace development.
346 * Linux kernel >= 2.6.18 is recommended. Older versions might still
347 work but they haven't been thoroughly tested with this release.
349 Noteworthy changes in release 4.6 (2011-03-15)
350 ==============================================
352 * Changes in behavior
353 * Print diagnostic information about changes in personality mode to
354 standard error instead of standard output.
357 * Implemented a new method of following clone, fork, and vfork
358 syscalls using the Linux kernel's explicit facilities for tracing
359 creation of threads and child processes.
360 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
361 * Implemented decoding of TLS syscalls on m68k.
362 * Implemented biarch support on powerpc64.
363 * Implemented biarch support for getrlimit() and setrlimit().
364 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
365 * Implemented SOL_SCTP socket options decoding.
366 * Added HDIO_* ioctl names.
367 (Addresses Debian bug #450953).
368 * Added LOOP_* ioctl names.
369 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
370 to match Linux 2.6.37.
371 * Updated the list of IPPROTO_* constants to match netinet/in.h.
372 * Implemented decoding of HDIO_* and BLK* ioctls.
373 * Added MicroBlaze architecture support.
374 * Added new syscall entries to match Linux 2.6.37.
375 * Regenerated list of ioctl names from Linux 2.6.37.
376 * Enhanced signal notification decoding.
377 * Documented -C and -D options.
380 * Fixed fetching syscall arguments on m68k.
381 * Fixed an error when judging whether a process has children.
382 * Fixed get/set_robust_list syscall numbers for powerpc.
383 * Fixed a corner case in printing clone flags.
384 * Fixed cross-compiling issues.
385 * Fixed build issues on powerpc64, SH and SPARC.
386 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
387 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
388 fanotify_init, and fanotify_mark syscalls.
389 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
390 * Fixed biarch support in IO dumping.
391 * Fixed raw exit_group decoding.
392 * Fixed decoding of file descriptors on 64-bit architectures.
393 * Fixed a corner case in waitpid handling.
394 (Addresses Red Hat bug #663547).
395 * Fixed stat64 decoding on mips
396 (Addresses Debian bug #599028).
397 * Fixed misleading italics in the manual page.
398 (Addresses Debian bug #589323).
400 Noteworthy changes in release 4.5.20 (2010-04-13)
401 =================================================
404 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
405 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
406 rt_tgsigqueueinfo, perf_event_open.
407 * Enhanced decoding of recently added syscalls on non-x86 architectures
408 by replacing a bare decoder with elaborate parsers enabled earlier
410 * Implemented -C option to combine regular and -c output.
411 (Addresses Debian bug #466196)
412 * Enhanced decoding of mbind and mremap syscalls.
413 * Enhanced SOL_PACKET socket options decoding.
414 * Regenerated list of ioctl names from linux 2.6.33.
415 * Added TILE architecture support.
418 * Fixed build with Linux kernel headers 2.6.32-rc5+.
419 (Addresses Debian bug #560516 and Fedora bug #539044)
420 * Fixed build on mips.
421 * Fixed handling of Linux systems without struct statfs64.
422 * Fixed reporting signal mask by sigreturn on powerpc.
423 * Fixed potential stack buffer overflow in select decoder.
424 (Addresses Fedora bug #556678)
425 * Corrected msgsnd indirect ipccall decoding.
426 * Corrected decoding of 64bit syscalls.
427 (Addresses Debian bug #570603)
428 * Corrected getsockopt decoding on architectures where
429 sizeof(long) > sizeof(int).
430 (Addresses Debian bug #494844)
431 * Corrected decoding of epoll_pwait.
432 (Addresses Debian bug #513014)
433 * Corrected handling of killed threads.
435 Noteworthy changes in release 4.5.19 (2009-10-21)
436 =================================================
438 * Changes in behavior
439 * When command exits, strace now exits with the same exit status.
440 If command is terminated by a signal, strace terminates itself
441 with the same signal, so that strace can be used as a wrapper
442 process transparent to the invoking parent process.
443 When using -p option, the exit status of strace is zero unless
444 there was an unexpected error in doing the tracing.
445 (Addresses Fedora bug #105371 and Debian bug #37665)
448 * Implemented decoding of new Linux syscalls: accept4, dup3,
449 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
450 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
451 * Implemented decoding of accept4 socketcall.
452 * Enhanced prctl decoding.
453 * Enhanced nanosleep decoding.
454 * Enhanced ptrace decoding.
455 * Enhanced futex decoding.
456 * Enhanced CAP_* decoding.
457 * Enhanced SIOCS* ioctls decoding.
458 * Enhanced fcntl F_* flags decoding.
459 * Enhanced semop/semtimedop decoding.
460 * Updated ARM architecture support.
461 * Added Blackfin architecture support.
462 * Added AVR32 architecture support.
463 * Added CRIS architecture support.
464 * Made strace detect when traced process suddenly disappeared.
467 * Fixed syscall numbers for tee and sync_file_range.
468 (Addresses Debian bug #503124)
469 * Fixed several bugs in strings decoder, including potential heap
471 (Addresses Fedora bugs #470529, #478324 and #511035)
472 * Marked sendfile(2) as a network syscall.
473 (Addresses Debian bug #509499)
474 * Fixed accept(2) decoding.
475 (Addresses Debian bug #507573)
476 * Fixed sigtimedwait(2) decoding.
477 * Fixed build on ARM EABI.
478 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
479 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
480 (Addresses Red Hat bug #471169)
481 * Fixed display of 32-bit argv array on 64-bit architectures.
482 (Addresses Fedora bug #519480)
483 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
484 * Fixed HPPA architecture support.
485 (Addresses Debian bugs #437928 and #546619)
490 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
491 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
496 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
497 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
498 * Improved output for prctl system call on Linux.
499 * Improved support for Linux/ARM.
500 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
505 * Improved output for delete_module, futex, and mbind system calls on Linux.
506 * Improved output for SG_IO ioctls on Linux.
507 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
508 eventfd, getcpu, epoll_pwait.
513 * Several biarch improvements.
514 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
515 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
520 * Accept numeric system calls in -e.
525 * Introduce "-e trace=desc".
530 * Better x86-64 support for IA32 processes.
531 * Update PowerPC system calls.
532 * Better printing for Linux aio system calls.
536 * Quick fix release for build issues.
537 * One fix for Linux/ARM system call table.
542 * Print fault address for SIGSEGV/SIGBUS signals when available.
547 * Improve socket ioctl printing.
548 * Update Linux/IA64 syscall list.
549 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
550 * Improve mount flags printing.
551 * Support symbolic printing of x86_64 arch_prctl parameters.
556 * Update syscall tables for Alpha, ARM, HPPA.
557 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
558 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
559 * Improve ioctl command name matching.
560 * Print RTC_* ioctl structure contents.
561 * Support newer RLIMIT_* values.
562 * Print struct cmsghdr details in sendmsg.
567 * Print attribute values in *xattr system calls on Linux.
568 * Include pread and pwrite calls in -e read and -e write tracing.
569 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
570 * Print clock_t values symbolically in Linux clock_* system calls.
574 * Bug fixes, Linux ioctl updates.
575 * David Miller contributed support for Linux/SPARC64.
583 * Update Linux ioctl lists.
584 * Update PF_* and AF_* value lists.
585 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
590 * On Linux using NPTL threads, -p will now attach to all threads in a process.
591 * Handle new mq_* system calls in Linux 2.6.6 and later.
596 * Report some new VM_* bit values on Linux.
597 * Better output for Linux sched_* system calls.
602 * Display multiple ioctl name matches on Linux.
606 * New port to AMD's x86-64 architecture. One strace binary can
607 handle both new x86-64 and old i386 processes.
608 * Fixed support for LFS64 calls.
609 * New switch -E to add/remove environment variables for the command.
610 * Merged s390/s390x port.
611 * Trace an unbounded number of processes.
612 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
613 * Fixed bugs with attach/detach leaving things stopped.
614 * Fixed traced process seeing ECHILD despite live, traced children
615 in waitpid calls with WNOHANG.
616 * Stuart Menefy contributed a port to Linux/SH.
617 * Stephen Thomas contributed a port to Linux/SH64.
618 * Many other bug fixes.
622 * Fix Linux/ia64 support, looks like someone renamed a few things on us
623 * Fix the ioctl setup for Linux, turned out it did not really work.
624 Improve the ioctl extracter as well so we decode some more ones.
628 * compile fixes for Linux/mips
632 * Linux ia64 and hppa ports added
633 * The usual Linux syscall updates (includes 32bit uid/gid support),
634 * Linux ioctl list updated
635 * Support IPv6 scope ids
636 * FreeBSD/i386 port added
637 * UnixWare and Solaris updates
638 * Better support for tracing multithreaded processes in Linux
642 * Compiles on glibc2.0 systems again
643 * Linux/S390 port added
644 * The usual Linux syscall updates
645 * we can follow fork on arm now
649 * Linux/MIPS port added
650 * Lots of Linux updates again
651 * Improved IPv6 support
657 * Compiles on glibc2.0 systems again
661 * Get stat structure properly on Linux 64bit archs
662 * Personalities work again
663 * Compile correctly on SunOS again
669 * Linux (ultra)sparc fixes
676 * add support for more Linux architectures (powerpc, sparc, arm)
677 * support lots more Linux syscalls
678 * fix signal handling
679 * add IPX and IPIP support
680 * check stray syscall after execv
681 * fix hanging children
683 Changes in version 3.1
684 ======================
687 * Linux 68k is supported
688 * Linux alpha is supported
689 * configure is upgraded to autoconf 2.x
690 * using -f in combination with -e now works correctly
691 * output can be piped to a program
692 * tracing setuid programs works better
693 * it is now reasonable to install strace setuid to root in some circumstances
694 * new useful tracing names like file and process to trace whole
695 classes of system calls, e.g. -efile traces all system calls that
696 take a file name as an argument
697 * IPC calls on SunOS 4.1.x are decoded
698 * Linux program memory is reliably dereferenced
699 * Linux decodes at least the name of all syscalls as of pre2.0.4
700 * various cosmetic changes and bug fixes
702 Changes from versions 2.x to version 3.0
703 ========================================
705 * filename arguments are neither abbreviated nor stringified
706 * string arguments are now true C strings using octal instead of hex by default
707 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
708 * by default the output for multiple processes now goes into one file
709 * all structures, vectors, bitsets, etc. use consistent output formats
710 * the -c option now means count calls, -i does what the old -c used to do
712 New Features in version 3.0
713 ===========================
715 * non-ascii strings can be optionally printed entirely in hex
716 * the output format is readable when mutiple processes are generating output
717 * exit values are printed in an alignment column
718 * is is possible to suppress messages about attaching and detaching
719 * various tracing features can be enabled on a per syscall/signal/desc basis
720 * selective tracing of syscalls
721 * selective printing of syscall structures
722 * selective abbreviation of long structures on a per syscall basis
723 * selective printing of raw syscall arguments and results
724 * selective tracing of signals
725 * selective dumping of all I/O read from file descriptors
726 * selective dumping of all I/O written to file descriptors
727 * optional counting of time, calls, and errors for each syscall