1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
4 * Changes in infrastructure
5 * The mailing list was moved to strace-devel@lists.strace.io.
8 * Angle brackets are now printed as octal number escape sequences
9 in the output of paths associated with file descriptors.
12 * IPv6 addresses shown in socket information in -yy mode are now printed
14 * Enhanced NETLINK_ROUTE protocol decoding.
15 * Updated lists of signal codes.
16 * Updated lists of BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
17 SCHED_FLAG_*, and SCTP_* constants.
18 * Implemented block/character device number printing in -yy mode.
19 * Known pixel/SDR format names are printed as comments for pixelformat fields
23 * Fixed build on m68k.
24 * Fixed v4l2 pixelformat decoding on big-endian architectures.
26 Noteworthy changes in release 4.21 (2018-02-13)
27 ===============================================
29 * Changes in behaviour
30 * Warning is now issued when -F option is used.
31 * Warning is now issued when a tracee with unsupported personality
33 * Unknown syscall numbers are now printed in hexadecimal form.
36 * Implemented decoding of netlink descriptor attributes as file descriptors.
37 * Implemented decoding of hugetlb page size selection flags.
38 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
39 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
40 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
41 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
42 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
43 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
45 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
46 * Implemented decoding of riscv_flush_icache syscall.
47 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
49 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
50 * Print values returned by mq_open syscall and first arguments
51 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
53 * Added decoding of get_tls syscall on arm.
54 * Added -e trace=%pure option for tracing system calls with no arguments that
56 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
57 SHM_*, and TCP_* constants.
58 * Added manual page for the strace-log-merge command.
59 * Updated lists of ioctl commands from Linux 4.15.
60 * Implemented biarch support for s390x.
61 * Implemented an optional support for symbol demangling in strace -k output
62 (activated by --with-libiberty configure option).
63 * Information about availability of demangling and reliable personality
64 decoding (on architectures with multiple personalities) is now available
66 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
67 powerpc and powerpc64.
68 * Enhanced manual page.
71 * Fixed multi-personality support in cross builds.
72 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
73 syscalls to %desc tracing set.
74 * Fixed path tracing support for mmap syscalls with indirect arguments and
75 for old select syscall.
76 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
77 * Fixed open mode flags decoding.
78 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
79 * Error counts that exceed one billion are now printed correctly in call
81 * Fixed call summary header for x32 personality.
82 * Changes of tracee personalities are reported more reliably.
83 * Fixed the case when strace attaches to a tracee being inside exec and its
84 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
85 which messed up all the syscall state tracking.
86 * Fixed printing of higher 32 bits of the return value for x32 personality.
89 * A C compiler that supports "for" loop initial declarations is now required.
90 * Inability to configure multiple personality support on architectures where
91 multiple personalities are supported leads to configuration failure during
92 build now. Use --enable-mpers=check to revert to the old behaviour.
93 * Build-time requirement for the mpers support has been lowered from gawk 4
95 * Removed incomplete and non-functional support for the CRIS architecture.
96 * Removed incomplete and unused support for IA-32 mode on the IA-64
99 Noteworthy changes in release 4.20 (2017-11-13)
100 ===============================================
103 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
104 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
106 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
107 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
109 * Added decoding of statx syscall on hppa.
110 * Updated lists of ioctl commands from Linux 4.14.
113 * Fixed powerpc personality support on powerpc64.
115 Noteworthy changes in release 4.19 (2017-09-05)
116 ===============================================
118 * Changes in behaviour
119 * Changed formatting of personality names on tile architecture in order
120 to make it in line with other multi-personality architectures.
121 * Changed field output order in struct v4l2_requestbuffers to improve in/out
123 * Changed handling of multiple signal= specifications in an injection
124 expression: multiple specification now leads to error instead of implicit
125 usage the last specification.
128 * Enhanced decoding of optlen argument of getsockopt syscall.
129 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
130 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
131 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
132 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
133 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
134 of setsockopt syscall.
135 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
136 (KDF parameters decoding).
137 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
138 * Enhanced decoding of UFFDIO_API ioctl command.
139 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
140 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
141 * Implemented decoding of linux socket filter programs specified
142 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
143 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
144 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
145 * Implemented NETLINK_SELINUX protocol specific decoding.
146 * Implemented decoding of netlink message ack flags.
147 * Implemented decoding of nlmsgerr netlink attributes.
148 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
149 * Implemented decoding of crypto_user_alg netlink attributes
151 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
152 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
154 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
155 * Improved handling of unexpected tracees (the ones that cloned with
156 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
157 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
158 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
159 * Added decoding of arch_prctl syscall on x86.
160 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
161 copy_file_range, preadv2, pwritev2, and statx on alpha.
162 * Added decoding of statx syscall on microblaze.
163 * Added decoding of s390_guarded_storage syscall on s390.
164 * Updated lists of ioctl commands from Linux 4.13.
165 * Enhanced manual page.
168 * Fixed printing of group_req structure on non-native personalities.
169 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
171 * Fixed formatting of nul-terminated strings which have kernel-imposed size
173 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
175 * Fixed build warnings on Android mips64.
176 * Fixed unused function "is_negated_errno" build warning when built
178 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
179 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
180 to use if Linux kernel has commit v4.10-rc1~114^2~2.
181 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
182 and inotify_init syscalls.
183 * Fixed personality switch printing on sparc64 and risc-v.
185 Noteworthy changes in release 4.18 (2017-07-05)
186 ===============================================
189 * Implemented decoding of SCM_TIMESTAMP* control messages.
190 * Implemented decoding of netlink NLMSG_DONE messages.
191 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
192 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
193 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
194 * Implemented decoding of NETLINK_GENERIC protocol families.
195 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
196 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
197 * Implemented basic decoding of netlink attributes.
198 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
199 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
200 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
201 netlink attributes of NETLINK_SOCK_DIAG.
202 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
203 SO_*, V4L2_*, and prctl ARCH_* constants.
204 * Updated lists of ioctl commands from Linux 4.12.
207 * In interactive mode (-I2), those signals that were blocked at startup
208 will remain blocked for the whole period of strace execution.
209 * strace no longer resets SIGCHLD handler in tracees to the default action.
210 * When traced command is terminated by a blocked signal, strace unblocks
211 that signal to ensure its own termination with the same signal.
212 * Fixed corner cases in decoding of old sigaction syscall.
213 * Fixed build with old kernel headers on mips.
214 * Fixed build on aarch64 and tile with glibc >= 2.26.
215 * Fixed build on arc and nios2.
217 Noteworthy changes in release 4.17 (2017-05-24)
218 ===============================================
220 * Changes in command line syntax
221 * Syscall classes specified in -e trace= option now have % prefix (like
222 -e trace=%process). Old style class names without leading % are still
223 supported, but considered deprecated now.
226 * Optimized syscall filtering.
227 * Improved representation of timestamps.
228 * Enhanced decoding of sched_setattr syscall.
229 * Added -e trace=%stat option for tracing variants of stat syscall.
230 * Added -e trace=%lstat option for tracing variants of lstat syscall.
231 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
233 * Added -e trace=%%stat option for tracing syscalls used for querying file
234 status information (stat, lstat, fstat, fstatat, statx, and their
236 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
238 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
240 * Added -e trace=%%statfs option for tracing syscalls used for querying file
241 system statistics information (statfs-like, fstatfs-like and ustat).
242 * Added -e trace=/regex option for filtering syscalls using regular
244 * Added support for prepending of question mark before syscall qualification
245 in -e trace expressions in order to suppress error in case no syscalls
246 matched the provided qualification.
247 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
248 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
249 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
251 * Implemented decoding of statx syscall.
252 * Implemented decoding of NS_* ioctl commands.
253 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
254 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
255 * Implemented decoding of NLMSG_ERROR netlink messages.
256 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
257 * Improved decoding of misplaced parts in DM_* ioctl commands.
258 * Updated lists of ioctl commands from Linux 4.11.
261 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
262 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
263 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
264 powerpc64, sh, sh64, sparc, and sparc64.
265 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
266 * Fixed decoding of netlink messages received within struct msghdr.
267 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
268 argument of sched_getattr syscall being not quite 32-bit.
269 * Fixed corner cases of printing inaccessible times argument of utimes
270 and futimesat syscalls.
272 Noteworthy changes in release 4.16 (2017-02-14)
273 ===============================================
276 * Implemented syscall return value injection (-e inject=SET:retval= option).
277 * Implemented signal injection (-e inject=SET:signal= option).
278 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
279 * Implemented decoding of all SG_* ioctl commands.
280 * Implemented decoding of ustat syscall.
281 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
282 and BPF_PROG_DETACH commands of bpf syscall.
283 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
284 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
286 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
287 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
288 * Updated lists of ioctl commands from Linux 4.10.
289 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
293 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
294 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
295 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
296 and pwritev* syscalls on x32.
297 * Fixed printing of string arguments of getxattr and setxattr syscalls
298 when -s option is used to limit the printed string size.
299 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
301 * Fixed decoding of SG_* and LOOP_* ioctl commands.
302 * Fixed build on mips with musl libc.
303 * Fixed cross-building of ioctlsort.
304 * Applied minor formatting fixes to the manual page.
306 Noteworthy changes in release 4.15 (2016-12-14)
307 ===============================================
309 * Changes in behavior
310 * Time stamps are now printed according to ISO 8601.
311 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
312 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
313 syscalls is now formatted as an array.
316 * Implemented syscall fault injection (-e fault=... option).
317 * Implemented decoding of DM_* ioctl commands.
318 * Implemented decoding of attr parameter of perf_event_open syscall.
319 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
320 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
321 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
323 * Implemented PTRACE_GETREGS API support on m68k.
324 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
325 and V4L2_* constants.
326 * Updated lists of ioctl commands from Linux 4.9.
327 * Added decoding of recently added syscalls on arc, x32, and xtensa.
328 * Enhanced manual page.
331 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
332 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
333 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
334 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
335 setgroups, setns, unshare, and utimes syscalls.
336 * Fixed handling of verbose flag in printing of controls array
337 of struct v4l2_ext_controls.
338 * Fixed omission of field names in the output of capability, sigaction,
339 sigevent, statfs, timespec, timeval, and utimbuf structures.
340 * Fixed printing of unknown syscalls in siginfo structure.
341 * Fixed decoding of ioctl constants on m68k.
342 * Fixed cris architecture support.
343 * Fixed cross build when host compiler does not support the same
344 set of warning flags as the cross compiler.
345 * Fixed build on SLE10 and SLE11.
347 Noteworthy changes in release 4.14 (2016-10-04)
348 ===============================================
350 * Changes in behavior
351 * When using -p option without a command and no processes has been attached,
352 strace exits with exit status 1.
355 * Added printing of the mode argument of open and openat syscalls
356 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
357 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
358 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
359 and aio family syscalls.
360 * Implemented fetching of the 7th subcall argument on mips o32.
361 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
363 * Updated lists of ioctl commands from Linux 4.8.
364 * Added decoding of new syscalls on sh and sh64.
365 * Added RISC-V architecture support.
368 * Marked io_setup and io_destroy as memory mapping related syscalls.
369 * Fixed leakage of placeholder descriptors to tracees.
370 * Fixed printing of mode_t, umode_t, and umask types.
371 * Fixed decoding of iovec arrays without a limit on total data size.
372 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
373 and ipc family syscalls.
374 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
375 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
377 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
378 * Fixed decoding of struct stat64 on sparc64.
379 * Fixed decoding of uid and gid-related syscalls on sparc64.
380 * Fixed decoding of the forth argument of semctl syscall on sparc64.
381 * Fixed values of tty ioctl constants on sparc64.
382 * Fixed sparc personality support on sparc64.
384 Noteworthy changes in release 4.13 (2016-07-26)
385 ===============================================
388 * Implemented a general netlink socket parser.
389 * Enhanced decoding of socket addresses.
390 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
391 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
392 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
393 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
394 and *_MAGIC constants.
395 * Updated lists of ioctl commands from Linux 4.7.
398 * Fixed decoding of pid_t argument of prlimit64 syscall.
399 * Fixed sign extension issues in the parser of struct rusage.
400 * Fixed race condition in decoding of timeout argument of recvmmsg and
401 rt_sigtimedwait syscalls.
402 * Fixed build with fresh linux kernel headers.
404 Noteworthy changes in release 4.12 (2016-05-31)
405 ===============================================
408 * Implemented simultaneous use of -p option and tracing of a command.
409 (addresses Debian bug #549942).
410 * Implemented caching of netlink conversations to reduce amount of time
411 spent in decoding socket details in -yy mode.
412 * Implemented -yy mode decoding of protocol:portid pairs associated with
413 netlink socket descriptors.
414 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
415 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
417 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
418 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
419 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
420 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
421 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
422 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
423 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
424 statfs64, tgkill, waitid, and xattr family syscalls.
425 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
426 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
427 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
428 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
429 * Added decoding of fadvise64 and fadvise64_64 on s390.
430 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
431 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
432 * Updated lists of ioctl commands from Linux 4.6.
435 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
436 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
437 * Fixed decoding of mlock2 syscall on sparc.
438 * Fixed decoding of osf_shmat syscall on alpha.
439 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
440 (addresses Debian bug #485979 and Fedora bug #1298294).
441 * Fixed decoding of preadv syscall in case of short read.
442 * Fixed decoding and dumping of readv syscall in case of short read.
443 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
444 * Fixed decoding of mincore syscall's last argument.
445 * Fixed remaining errors in mapping between syscall numbers and numbers
446 of syscall arguments.
447 * Applied various fixes to strace-graph script.
449 Noteworthy changes in release 4.11 (2015-12-21)
450 ===============================================
452 * Changes in behavior
453 * Some syscalls have different names depending on architecture and
454 personality. In these cases, syscall filtering and printing now
455 consistently uses the names that match corresponding __NR_* kernel
456 macros of the tracee's architecture and personality.
457 * Added strace prefix to all diagnostic messages.
460 * Enhanced and extended test suite.
461 * Implemented reliable tracing of processes whose personality differs
462 from the personality of strace, fixed decoding of 32-bit personality
463 syscalls on 64-bit architectures.
464 * When some data referenced by syscall arguments is irrelevant or cannot
465 be read from tracee's memory, strace now prints its address consistently.
466 * When a syscall is restarted using restart_syscall mechanism, strace now
467 shows the syscall name on architectures that expose this information.
468 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
469 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
470 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
471 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
472 * Optimized decoding of indirect socket syscalls.
473 * Implemented decoding of nanoseconds along with seconds in stat family
474 syscalls (addresses Fedora bug #1251176).
475 * Implemented decoding of struct statfs.f_flags in statfs syscall.
476 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
478 * Implemented decoding of indirect syscall on mips o32.
479 * Implemented decoding of IPPROTO_IP control messages.
480 * Implemented decoding of setsockopt syscall multicast arguments.
481 * Enhanced decoding of struct sigevent.
482 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
483 and v4l2 ioctl syscall arguments.
484 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
485 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
486 sendfile, setsockopt, and shmctl syscalls.
487 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
488 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
489 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
490 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
491 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
492 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
494 * Added Nios II architecture support.
495 * Added new syscall entries to match Linux 4.4.
498 * Fixed potential short read of strings from tracee's memory.
499 * Fixed -qq option in conjunction with -o option.
500 * Fixed filtering of <unavailable> syscalls.
501 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
502 with 64-bit aligned structures.
503 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
504 syscall flags arguments.
505 * Fixed decoding of 4th argument of clock_nanosleep syscall.
506 * Fixed decoding of getpagesize syscall on m68k.
507 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
508 * Fixed decoding of timezone argument of gettimeofday and settimeofday
510 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
512 * Fixed decoding of pipe syscall on alpha and mips.
513 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
514 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
515 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
517 * Fixed decoding of 4th argument of semctl indirect syscall.
518 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
519 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
520 * Fixed decoding of struct dirent on x32.
521 * Fixed decoding of times syscall return value on mips n32 and x32.
522 * Fixed decoding of path argument of umount2 syscall
523 (addresses Debian bug #785050).
524 * Worked around a kernel bug in tracing privileged executables.
525 * Fixed various errors in mapping between syscall numbers and associated
526 information like the number of syscall arguments, the name of syscall,
529 Noteworthy changes in release 4.10 (2015-03-06)
530 ===============================================
533 * Added -yy option to print protocol and address information associated with
535 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
536 recvmsg, sendmmsg, and recvmmsg syscalls.
537 * Implemented full 32-bit decoding of ioctl commands
538 (addresses Debian bug #692913 and Fedora bug #902788).
539 * Implemented PTRACE_GETREGS API support on ia64.
540 * Implemented PTRACE_GETREGS API support on mips.
541 * Implemented PTRACE_GETREGSET API support on s390/s390x.
542 * Implemented decoding of getrandom and seccomp syscalls.
543 * Implemented full decoding of 64-bit capability sets.
544 * Implemented decoding of all prctl commands.
545 * Implemented decoding of parametrized ioctl commands.
546 * Implemented decoding of evdev ioctl commands.
547 * Implemented decoding of v4l ioctl commands.
548 * Implemented decoding of SG_IO v4 ioctl commands.
549 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
550 * Implemented decoding of FALLOC_FL_* fallocate flags.
551 * Implemented decoding of rt_sigreturn signal mask on aarch64,
553 * Enhanced socket decoder to support bluetooth sockets.
554 * Enhanced decoding of unlisted ioctl commands.
555 * Enhanced decoding of getsockopt and setsockopt syscall.
556 * Enhanced decoding of sysinfo syscall.
557 * Enhanced decoding of struct cmsghdr.
558 * Enhanced decoding of wait status.
559 * Enhanced aio support on non-x86 architectures by using external libaio.h.
560 * Added O_TMPFILE to the list of recognized open mode flags.
561 * Updated the list of filesystem type constants that is used in decoding
562 statfs family syscalls.
563 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
565 * Updated lists of signal constants from Linux 3.19.
566 * Updated lists of errno constants from Linux 3.19.
567 * Updated lists of ioctl commands from Linux 3.9.
568 * Added new syscall entries to match Linux 3.19.
571 * Fixed various errors in mapping between syscall numbers and associated
572 information like the number of syscall arguments, the name of syscall,
574 * Fixed quoting issues in printing descriptors, filenames, network interface
575 names, struct utsname members, device/volume names of BLK* ioctl commands.
576 * Fixed uid_t/git_t decoding.
577 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
578 * Fixed potential open flags truncation on some architectures.
579 * Fixed decoding of struct ifreq.ifr_name.
580 * Fixed decoding of SIOCSIFNAME ioctl command.
581 * Fixed decoding of RENAME_* renameat2 flags.
582 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
583 * Fixed decoding of indirect ipc subcalls on some architectures.
584 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
585 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
586 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
587 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
588 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
589 sparc, sparc64, mips, and s390.
590 * Fixed instruction pointer output (-i option) on architectures that support
591 several personalities.
592 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
594 * Fixed build on systems where struct sigaction has no sa_restorer member.
595 * Fixed build with uclibc and musl libc.
598 * Linux kernel >= 2.5.46 is required.
599 Older versions without a decent PTRACE_SETOPTIONS support will not work.
600 * On mips, linux kernel >= 2.6.15 is required.
601 Older versions without a decent PTRACE_GETREGS support will not work.
602 * On s390 and s390x, linux kernel >= 2.6.27 is required.
603 Older versions without a decent PTRACE_GETREGSET support will not work.
605 Noteworthy changes in release 4.9 (2014-08-15)
606 ==============================================
608 * Changes in behavior
609 * Disabled OABI support on ARM EABI systems by default,
610 added --enable-arm-oabi option to enable it at configure time.
613 * Added experimental -k option to print stack trace after each traced syscall.
614 * Added -w option to produce stats on syscall latency.
615 (addresses Debian bug #457497).
616 * Added ARC architecture support.
617 * Added PTRACE_GETREGS API support on PowerPC.
618 * Enhanced Bionic libc and musl libc support.
619 * Enhanced tracing of x86 personality processes on x86_64 and x32.
620 * Enhanced tracing of ARM personality processes on AArch64.
621 * Enhanced 32/64bit personality detection on PowerPC.
622 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
623 renameat2, and request_key syscalls.
624 * Robustified decoding of select, pselect, and io_submit syscalls.
625 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
626 setdomainname, sethostname, setns, and sync_file_range syscalls.
627 * Enhanced decoding of signal bitmasks.
628 * Enhanced decoding of file descriptors.
629 * Enhanced siginfo_t decoding.
630 * Enhanced PF_NETLINK decoding.
631 * Updated CLOCK_* constants
632 (addresses Fedora bug #1088455).
633 * Added new syscall entries to match Linux 3.16.
636 * Added shmat and shmdt to the set of memory mapping related syscalls.
637 * Fixed detaching from stopped processes.
638 * Fixed fanotify_mark decoding on 32bit architectures.
639 * Fixed offset decoding in preadv and pwritev syscalls.
640 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
641 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
642 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
643 (addresses Fedora bug #993384).
644 * Miscellaneous corrections in the manual page.
645 (Addresses Debian bug #725987).
647 Noteworthy changes in release 4.8 (2013-06-03)
648 ==============================================
650 * Changes in behavior
651 * In case of normal strace termination, when the trace output is
652 redirected to a pipe, strace now closes it and waits for the pipe
653 process termination before exit.
656 * Implemented tracing using PTRACE_SEIZE API (when available).
657 * Implemented more reliable PTRACE_GETREGSET-based process personality
658 detection on x86-64 and x32 (when available).
659 * Added -e trace=memory option for tracing memory mapping related syscalls.
660 * Documented -b option.
661 * Allowed exit status messages to be suppressed by giving -q option twice.
662 * Added AArch64 architecture support
663 (addresses Debian bug #693074 and Fedora bug #969858).
664 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
665 * Added tilegx personality support for Tile.
666 * Enhanced support of NOMMU architectures.
667 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
669 * Added new syscall entries to match Linux 3.9.
670 * Regenerated the list of common ioctl names from Linux 3.9.
671 * Updated the list of errno constants.
672 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
673 PTRACE_O_*, and TCP_* constants.
674 * Implemented decoding of UBI ioctls.
675 * Removed redundant "*32" ioctl names.
678 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
679 (addresses Fedora bug #659382).
680 * Fixed kernel release string parsing
681 (addresses Debian bug #702309).
682 * Fixed decoding of *xattr syscalls
683 (addresses Fedora bug #885233).
684 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
685 (addresses Fedora bug #912790).
686 * Fixed tracing forks on SPARC.
687 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
688 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
689 and truncate64 syscalls.
690 * Fixed categories of multiple syscalls on most of supported architectures.
691 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
692 * Fixed decoding of multiple 32-bit personality syscalls on x32.
693 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
694 S390x, and Tile architectures.
695 * Fixed semtimedop decoding on S390x.
696 * Fixed sram_alloc decoding on Blackfin.
697 * Fixed build when process_vm_readv is a stab.
698 * Fixed build with older versions of libaio.h.
700 Noteworthy changes in release 4.7 (2012-05-02)
701 ==============================================
703 * Changes in behavior
704 * strace no longer suspends waitpid until there is a child
705 for waitpid'ing process to collect status from.
706 * strace no longer detaches from a tracee which is supposed
708 * strace now issues a new message: "+++ exited with EXITCODE +++"
709 which shows exact moment strace got exit notification,
710 analogous to existing "+++ killed by SIG +++" message.
713 * Added x32 personality support (x86_64 architecture).
714 * Added -y and -P options to print file descriptor paths and
715 filter by those paths.
716 * Added -I option to control strace interactivity.
717 * Allowed -p option to take comma or whitespace-separated list of PIDs.
718 * Added strace_log_merge script helper to merge timestamped "strace -ff"
720 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
721 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
722 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
723 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
724 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
725 listxattr, setrlimit and swapon syscalls.
726 * Implemented decoding of loop and mtd ioctls.
727 * Added syscall entries for new linux syscalls.
728 * Added syscall entries for direct socket system calls on powerpc.
729 * Updated the list of errno constants.
730 * Updated lists of MSG_*, STA_*, and TCP_* constants.
731 * Regenerated the list of ioctl names from Linux 3.3.
732 * Enhanced switching between processes with different personalities.
733 * Enhanced signals reporting by using short signal names.
734 * Made ERESTART* messages more descriptive.
735 * Made parsing of numbers from strings more robust.
736 * Added support for compat_statfs64 and statfs64.f_flags.
737 * Changed read of data blocks to use single process_vm_readv syscall
738 (when available) instead of several PTRACE_PEEKDATA operations.
739 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
740 operation instead of several PTRACE_PEEKUSER operations.
741 * Applied various optimizations to make strace work faster.
744 * Implemented proper handling of real SIGTRAPs on kernels supporting
745 PTRACE_O_TRACESYSGOOD.
746 (Addresses Fedora bug #162774).
747 * Fixed sockaddr_un.sun_path name in decoded output.
748 (Addresses Debian bug #554946).
749 * Fixed to avoid potential core file clobbering on exit.
750 (Addresses Debian bug #656398).
751 * Fixed a typo in documentation.
752 (Addresses Debian bug #653309).
753 * Fixed decoding of timer id returned by timer_create.
754 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
755 * Fixed *at syscalls flags decoding.
756 * Fixed ARM EABI 64-bit syscall's arguments decoding.
757 * Fixed semtimedop decoding on s390.
758 * Fixed osf_sigprocmask decoding on alpha.
759 * Fixed ipc and socket subcall decoding on several architectures.
760 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
761 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
762 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
763 * Corrected io_* syscall entries on ARM.
764 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
765 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
766 * Fixed build when libaio-devel is not available.
767 * Fixed configure checks for PTRACE_* constants.
768 * Fixed compilation warnings remained on several architectures.
771 * Removed all non-Linux code. After years of neglect, that dead code
772 just hampered further strace development.
773 * Linux kernel >= 2.6.18 is recommended. Older versions might still
774 work but they haven't been thoroughly tested with this release.
776 Noteworthy changes in release 4.6 (2011-03-15)
777 ==============================================
779 * Changes in behavior
780 * Print diagnostic information about changes in personality mode to
781 standard error instead of standard output.
784 * Implemented a new method of following clone, fork, and vfork
785 syscalls using the Linux kernel's explicit facilities for tracing
786 creation of threads and child processes.
787 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
788 * Implemented decoding of TLS syscalls on m68k.
789 * Implemented biarch support on powerpc64.
790 * Implemented biarch support for getrlimit() and setrlimit().
791 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
792 * Implemented SOL_SCTP socket options decoding.
793 * Added HDIO_* ioctl names.
794 (Addresses Debian bug #450953).
795 * Added LOOP_* ioctl names.
796 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
797 to match Linux 2.6.37.
798 * Updated the list of IPPROTO_* constants to match netinet/in.h.
799 * Implemented decoding of HDIO_* and BLK* ioctls.
800 * Added MicroBlaze architecture support.
801 * Added new syscall entries to match Linux 2.6.37.
802 * Regenerated list of ioctl names from Linux 2.6.37.
803 * Enhanced signal notification decoding.
804 * Documented -C and -D options.
807 * Fixed fetching syscall arguments on m68k.
808 * Fixed an error when judging whether a process has children.
809 * Fixed get/set_robust_list syscall numbers for powerpc.
810 * Fixed a corner case in printing clone flags.
811 * Fixed cross-compiling issues.
812 * Fixed build issues on powerpc64, SH and SPARC.
813 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
814 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
815 fanotify_init, and fanotify_mark syscalls.
816 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
817 * Fixed biarch support in IO dumping.
818 * Fixed raw exit_group decoding.
819 * Fixed decoding of file descriptors on 64-bit architectures.
820 * Fixed a corner case in waitpid handling.
821 (Addresses Red Hat bug #663547).
822 * Fixed stat64 decoding on mips
823 (Addresses Debian bug #599028).
824 * Fixed misleading italics in the manual page.
825 (Addresses Debian bug #589323).
827 Noteworthy changes in release 4.5.20 (2010-04-13)
828 =================================================
831 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
832 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
833 rt_tgsigqueueinfo, perf_event_open.
834 * Enhanced decoding of recently added syscalls on non-x86 architectures
835 by replacing a bare decoder with elaborate parsers enabled earlier
837 * Implemented -C option to combine regular and -c output.
838 (Addresses Debian bug #466196)
839 * Enhanced decoding of mbind and mremap syscalls.
840 * Enhanced SOL_PACKET socket options decoding.
841 * Regenerated list of ioctl names from linux 2.6.33.
842 * Added TILE architecture support.
845 * Fixed build with Linux kernel headers 2.6.32-rc5+.
846 (Addresses Debian bug #560516 and Fedora bug #539044)
847 * Fixed build on mips.
848 * Fixed handling of Linux systems without struct statfs64.
849 * Fixed reporting signal mask by sigreturn on powerpc.
850 * Fixed potential stack buffer overflow in select decoder.
851 (Addresses Fedora bug #556678)
852 * Corrected msgsnd indirect ipccall decoding.
853 * Corrected decoding of 64bit syscalls.
854 (Addresses Debian bug #570603)
855 * Corrected getsockopt decoding on architectures where
856 sizeof(long) > sizeof(int).
857 (Addresses Debian bug #494844)
858 * Corrected decoding of epoll_pwait.
859 (Addresses Debian bug #513014)
860 * Corrected handling of killed threads.
862 Noteworthy changes in release 4.5.19 (2009-10-21)
863 =================================================
865 * Changes in behavior
866 * When command exits, strace now exits with the same exit status.
867 If command is terminated by a signal, strace terminates itself
868 with the same signal, so that strace can be used as a wrapper
869 process transparent to the invoking parent process.
870 When using -p option, the exit status of strace is zero unless
871 there was an unexpected error in doing the tracing.
872 (Addresses Fedora bug #105371 and Debian bug #37665)
875 * Implemented decoding of new Linux syscalls: accept4, dup3,
876 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
877 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
878 * Implemented decoding of accept4 socketcall.
879 * Enhanced prctl decoding.
880 * Enhanced nanosleep decoding.
881 * Enhanced ptrace decoding.
882 * Enhanced futex decoding.
883 * Enhanced CAP_* decoding.
884 * Enhanced SIOCS* ioctls decoding.
885 * Enhanced fcntl F_* flags decoding.
886 * Enhanced semop/semtimedop decoding.
887 * Updated ARM architecture support.
888 * Added Blackfin architecture support.
889 * Added AVR32 architecture support.
890 * Added CRIS architecture support.
891 * Made strace detect when traced process suddenly disappeared.
894 * Fixed syscall numbers for tee and sync_file_range.
895 (Addresses Debian bug #503124)
896 * Fixed several bugs in strings decoder, including potential heap
898 (Addresses Fedora bugs #470529, #478324 and #511035)
899 * Marked sendfile(2) as a network syscall.
900 (Addresses Debian bug #509499)
901 * Fixed accept(2) decoding.
902 (Addresses Debian bug #507573)
903 * Fixed sigtimedwait(2) decoding.
904 * Fixed build on ARM EABI.
905 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
906 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
907 (Addresses Red Hat bug #471169)
908 * Fixed display of 32-bit argv array on 64-bit architectures.
909 (Addresses Fedora bug #519480)
910 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
911 * Fixed HPPA architecture support.
912 (Addresses Debian bugs #437928 and #546619)
917 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
918 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
923 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
924 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
925 * Improved output for prctl system call on Linux.
926 * Improved support for Linux/ARM.
927 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
932 * Improved output for delete_module, futex, and mbind system calls on Linux.
933 * Improved output for SG_IO ioctls on Linux.
934 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
935 eventfd, getcpu, epoll_pwait.
940 * Several biarch improvements.
941 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
942 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
947 * Accept numeric system calls in -e.
952 * Introduce "-e trace=desc".
957 * Better x86-64 support for IA32 processes.
958 * Update PowerPC system calls.
959 * Better printing for Linux aio system calls.
963 * Quick fix release for build issues.
964 * One fix for Linux/ARM system call table.
969 * Print fault address for SIGSEGV/SIGBUS signals when available.
974 * Improve socket ioctl printing.
975 * Update Linux/IA64 syscall list.
976 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
977 * Improve mount flags printing.
978 * Support symbolic printing of x86_64 arch_prctl parameters.
983 * Update syscall tables for Alpha, ARM, HPPA.
984 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
985 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
986 * Improve ioctl command name matching.
987 * Print RTC_* ioctl structure contents.
988 * Support newer RLIMIT_* values.
989 * Print struct cmsghdr details in sendmsg.
994 * Print attribute values in *xattr system calls on Linux.
995 * Include pread and pwrite calls in -e read and -e write tracing.
996 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
997 * Print clock_t values symbolically in Linux clock_* system calls.
1001 * Bug fixes, Linux ioctl updates.
1002 * David Miller contributed support for Linux/SPARC64.
1010 * Update Linux ioctl lists.
1011 * Update PF_* and AF_* value lists.
1012 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1017 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1018 * Handle new mq_* system calls in Linux 2.6.6 and later.
1023 * Report some new VM_* bit values on Linux.
1024 * Better output for Linux sched_* system calls.
1029 * Display multiple ioctl name matches on Linux.
1033 * New port to AMD's x86-64 architecture. One strace binary can
1034 handle both new x86-64 and old i386 processes.
1035 * Fixed support for LFS64 calls.
1036 * New switch -E to add/remove environment variables for the command.
1037 * Merged s390/s390x port.
1038 * Trace an unbounded number of processes.
1039 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1040 * Fixed bugs with attach/detach leaving things stopped.
1041 * Fixed traced process seeing ECHILD despite live, traced children
1042 in waitpid calls with WNOHANG.
1043 * Stuart Menefy contributed a port to Linux/SH.
1044 * Stephen Thomas contributed a port to Linux/SH64.
1045 * Many other bug fixes.
1049 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1050 * Fix the ioctl setup for Linux, turned out it did not really work.
1051 Improve the ioctl extractor as well so we decode some more ones.
1055 * compile fixes for Linux/mips
1059 * Linux ia64 and hppa ports added
1060 * The usual Linux syscall updates (includes 32bit uid/gid support),
1061 * Linux ioctl list updated
1062 * Support IPv6 scope ids
1063 * FreeBSD/i386 port added
1064 * UnixWare and Solaris updates
1065 * Better support for tracing multithreaded processes in Linux
1069 * Compiles on glibc2.0 systems again
1070 * Linux/S390 port added
1071 * The usual Linux syscall updates
1072 * we can follow fork on arm now
1076 * Linux/MIPS port added
1077 * Lots of Linux updates again
1078 * Improved IPv6 support
1084 * Compiles on glibc2.0 systems again
1088 * Get stat structure properly on Linux 64bit archs
1089 * Personalities work again
1090 * Compile correctly on SunOS again
1096 * Linux (ultra)sparc fixes
1103 * add support for more Linux architectures (powerpc, sparc, arm)
1104 * support lots more Linux syscalls
1105 * fix signal handling
1106 * add IPX and IPIP support
1107 * check stray syscall after execv
1108 * fix hanging children
1110 Changes in version 3.1
1111 ======================
1113 * Irix5 is supported
1114 * Linux 68k is supported
1115 * Linux alpha is supported
1116 * configure is upgraded to autoconf 2.x
1117 * using -f in combination with -e now works correctly
1118 * output can be piped to a program
1119 * tracing setuid programs works better
1120 * it is now reasonable to install strace setuid to root in some circumstances
1121 * new useful tracing names like file and process to trace whole
1122 classes of system calls, e.g. -efile traces all system calls that
1123 take a file name as an argument
1124 * IPC calls on SunOS 4.1.x are decoded
1125 * Linux program memory is reliably dereferenced
1126 * Linux decodes at least the name of all syscalls as of pre2.0.4
1127 * various cosmetic changes and bug fixes
1129 Changes from versions 2.x to version 3.0
1130 ========================================
1132 * filename arguments are neither abbreviated nor stringified
1133 * string arguments are now true C strings using octal instead of hex by default
1134 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1135 * by default the output for multiple processes now goes into one file
1136 * all structures, vectors, bitsets, etc. use consistent output formats
1137 * the -c option now means count calls, -i does what the old -c used to do
1139 New Features in version 3.0
1140 ===========================
1142 * non-ascii strings can be optionally printed entirely in hex
1143 * the output format is readable when multiple processes are generating output
1144 * exit values are printed in an alignment column
1145 * is is possible to suppress messages about attaching and detaching
1146 * various tracing features can be enabled on a per syscall/signal/desc basis
1147 * selective tracing of syscalls
1148 * selective printing of syscall structures
1149 * selective abbreviation of long structures on a per syscall basis
1150 * selective printing of raw syscall arguments and results
1151 * selective tracing of signals
1152 * selective dumping of all I/O read from file descriptors
1153 * selective dumping of all I/O written to file descriptors
1154 * optional counting of time, calls, and errors for each syscall