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 INET_DIAG_BC_*, POLL*, RWF_*, and SCHED_FLAG_* constants.
17 * Implemented block/character device number printing in -yy mode.
20 * Fixed build on m68k.
21 * Fixed v4l2 pixelformat decoding on big-endian architectures.
23 Noteworthy changes in release 4.21 (2018-02-13)
24 ===============================================
26 * Changes in behaviour
27 * Warning is now issued when -F option is used.
28 * Warning is now issued when a tracee with unsupported personality
30 * Unknown syscall numbers are now printed in hexadecimal form.
33 * Implemented decoding of netlink descriptor attributes as file descriptors.
34 * Implemented decoding of hugetlb page size selection flags.
35 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
36 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
37 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
38 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
39 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
40 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
42 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
43 * Implemented decoding of riscv_flush_icache syscall.
44 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
46 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
47 * Print values returned by mq_open syscall and first arguments
48 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
50 * Added decoding of get_tls syscall on arm.
51 * Added -e trace=%pure option for tracing system calls with no arguments that
53 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
54 SHM_*, and TCP_* constants.
55 * Added manual page for the strace-log-merge command.
56 * Updated lists of ioctl commands from Linux 4.15.
57 * Implemented biarch support for s390x.
58 * Implemented an optional support for symbol demangling in strace -k output
59 (activated by --with-libiberty configure option).
60 * Information about availability of demangling and reliable personality
61 decoding (on architectures with multiple personalities) is now available
63 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
64 powerpc and powerpc64.
65 * Enhanced manual page.
68 * Fixed multi-personality support in cross builds.
69 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
70 syscalls to %desc tracing set.
71 * Fixed path tracing support for mmap syscalls with indirect arguments and
72 for old select syscall.
73 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
74 * Fixed open mode flags decoding.
75 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
76 * Error counts that exceed one billion are now printed correctly in call
78 * Fixed call summary header for x32 personality.
79 * Changes of tracee personalities are reported more reliably.
80 * Fixed the case when strace attaches to a tracee being inside exec and its
81 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
82 which messed up all the syscall state tracking.
83 * Fixed printing of higher 32 bits of the return value for x32 personality.
86 * A C compiler that supports "for" loop initial declarations is now required.
87 * Inability to configure multiple personality support on architectures where
88 multiple personalities are supported leads to configuration failure during
89 build now. Use --enable-mpers=check to revert to the old behaviour.
90 * Build-time requirement for the mpers support has been lowered from gawk 4
92 * Removed incomplete and non-functional support for the CRIS architecture.
93 * Removed incomplete and unused support for IA-32 mode on the IA-64
96 Noteworthy changes in release 4.20 (2017-11-13)
97 ===============================================
100 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
101 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
103 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
104 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
106 * Added decoding of statx syscall on hppa.
107 * Updated lists of ioctl commands from Linux 4.14.
110 * Fixed powerpc personality support on powerpc64.
112 Noteworthy changes in release 4.19 (2017-09-05)
113 ===============================================
115 * Changes in behaviour
116 * Changed formatting of personality names on tile architecture in order
117 to make it in line with other multi-personality architectures.
118 * Changed field output order in struct v4l2_requestbuffers to improve in/out
120 * Changed handling of multiple signal= specifications in an injection
121 expression: multiple specification now leads to error instead of implicit
122 usage the last specification.
125 * Enhanced decoding of optlen argument of getsockopt syscall.
126 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
127 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
128 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
129 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
130 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
131 of setsockopt syscall.
132 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
133 (KDF parameters decoding).
134 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
135 * Enhanced decoding of UFFDIO_API ioctl command.
136 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
137 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
138 * Implemented decoding of linux socket filter programs specified
139 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
140 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
141 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
142 * Implemented NETLINK_SELINUX protocol specific decoding.
143 * Implemented decoding of netlink message ack flags.
144 * Implemented decoding of nlmsgerr netlink attributes.
145 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
146 * Implemented decoding of crypto_user_alg netlink attributes
148 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
149 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
151 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
152 * Improved handling of unexpected tracees (the ones that cloned with
153 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
154 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
155 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
156 * Added decoding of arch_prctl syscall on x86.
157 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
158 copy_file_range, preadv2, pwritev2, and statx on alpha.
159 * Added decoding of statx syscall on microblaze.
160 * Added decoding of s390_guarded_storage syscall on s390.
161 * Updated lists of ioctl commands from Linux 4.13.
162 * Enhanced manual page.
165 * Fixed printing of group_req structure on non-native personalities.
166 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
168 * Fixed formatting of nul-terminated strings which have kernel-imposed size
170 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
172 * Fixed build warnings on Android mips64.
173 * Fixed unused function "is_negated_errno" build warning when built
175 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
176 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
177 to use if Linux kernel has commit v4.10-rc1~114^2~2.
178 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
179 and inotify_init syscalls.
180 * Fixed personality switch printing on sparc64 and risc-v.
182 Noteworthy changes in release 4.18 (2017-07-05)
183 ===============================================
186 * Implemented decoding of SCM_TIMESTAMP* control messages.
187 * Implemented decoding of netlink NLMSG_DONE messages.
188 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
189 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
190 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
191 * Implemented decoding of NETLINK_GENERIC protocol families.
192 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
193 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
194 * Implemented basic decoding of netlink attributes.
195 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
196 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
197 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
198 netlink attributes of NETLINK_SOCK_DIAG.
199 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
200 SO_*, V4L2_*, and prctl ARCH_* constants.
201 * Updated lists of ioctl commands from Linux 4.12.
204 * In interactive mode (-I2), those signals that were blocked at startup
205 will remain blocked for the whole period of strace execution.
206 * strace no longer resets SIGCHLD handler in tracees to the default action.
207 * When traced command is terminated by a blocked signal, strace unblocks
208 that signal to ensure its own termination with the same signal.
209 * Fixed corner cases in decoding of old sigaction syscall.
210 * Fixed build with old kernel headers on mips.
211 * Fixed build on aarch64 and tile with glibc >= 2.26.
212 * Fixed build on arc and nios2.
214 Noteworthy changes in release 4.17 (2017-05-24)
215 ===============================================
217 * Changes in command line syntax
218 * Syscall classes specified in -e trace= option now have % prefix (like
219 -e trace=%process). Old style class names without leading % are still
220 supported, but considered deprecated now.
223 * Optimized syscall filtering.
224 * Improved representation of timestamps.
225 * Enhanced decoding of sched_setattr syscall.
226 * Added -e trace=%stat option for tracing variants of stat syscall.
227 * Added -e trace=%lstat option for tracing variants of lstat syscall.
228 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
230 * Added -e trace=%%stat option for tracing syscalls used for querying file
231 status information (stat, lstat, fstat, fstatat, statx, and their
233 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
235 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
237 * Added -e trace=%%statfs option for tracing syscalls used for querying file
238 system statistics information (statfs-like, fstatfs-like and ustat).
239 * Added -e trace=/regex option for filtering syscalls using regular
241 * Added support for prepending of question mark before syscall qualification
242 in -e trace expressions in order to suppress error in case no syscalls
243 matched the provided qualification.
244 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
245 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
246 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
248 * Implemented decoding of statx syscall.
249 * Implemented decoding of NS_* ioctl commands.
250 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
251 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
252 * Implemented decoding of NLMSG_ERROR netlink messages.
253 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
254 * Improved decoding of misplaced parts in DM_* ioctl commands.
255 * Updated lists of ioctl commands from Linux 4.11.
258 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
259 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
260 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
261 powerpc64, sh, sh64, sparc, and sparc64.
262 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
263 * Fixed decoding of netlink messages received within struct msghdr.
264 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
265 argument of sched_getattr syscall being not quite 32-bit.
266 * Fixed corner cases of printing inaccessible times argument of utimes
267 and futimesat syscalls.
269 Noteworthy changes in release 4.16 (2017-02-14)
270 ===============================================
273 * Implemented syscall return value injection (-e inject=SET:retval= option).
274 * Implemented signal injection (-e inject=SET:signal= option).
275 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
276 * Implemented decoding of all SG_* ioctl commands.
277 * Implemented decoding of ustat syscall.
278 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
279 and BPF_PROG_DETACH commands of bpf syscall.
280 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
281 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
283 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
284 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
285 * Updated lists of ioctl commands from Linux 4.10.
286 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
290 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
291 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
292 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
293 and pwritev* syscalls on x32.
294 * Fixed printing of string arguments of getxattr and setxattr syscalls
295 when -s option is used to limit the printed string size.
296 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
298 * Fixed decoding of SG_* and LOOP_* ioctl commands.
299 * Fixed build on mips with musl libc.
300 * Fixed cross-building of ioctlsort.
301 * Applied minor formatting fixes to the manual page.
303 Noteworthy changes in release 4.15 (2016-12-14)
304 ===============================================
306 * Changes in behavior
307 * Time stamps are now printed according to ISO 8601.
308 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
309 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
310 syscalls is now formatted as an array.
313 * Implemented syscall fault injection (-e fault=... option).
314 * Implemented decoding of DM_* ioctl commands.
315 * Implemented decoding of attr parameter of perf_event_open syscall.
316 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
317 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
318 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
320 * Implemented PTRACE_GETREGS API support on m68k.
321 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
322 and V4L2_* constants.
323 * Updated lists of ioctl commands from Linux 4.9.
324 * Added decoding of recently added syscalls on arc, x32, and xtensa.
325 * Enhanced manual page.
328 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
329 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
330 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
331 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
332 setgroups, setns, unshare, and utimes syscalls.
333 * Fixed handling of verbose flag in printing of controls array
334 of struct v4l2_ext_controls.
335 * Fixed omission of field names in the output of capability, sigaction,
336 sigevent, statfs, timespec, timeval, and utimbuf structures.
337 * Fixed printing of unknown syscalls in siginfo structure.
338 * Fixed decoding of ioctl constants on m68k.
339 * Fixed cris architecture support.
340 * Fixed cross build when host compiler does not support the same
341 set of warning flags as the cross compiler.
342 * Fixed build on SLE10 and SLE11.
344 Noteworthy changes in release 4.14 (2016-10-04)
345 ===============================================
347 * Changes in behavior
348 * When using -p option without a command and no processes has been attached,
349 strace exits with exit status 1.
352 * Added printing of the mode argument of open and openat syscalls
353 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
354 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
355 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
356 and aio family syscalls.
357 * Implemented fetching of the 7th subcall argument on mips o32.
358 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
360 * Updated lists of ioctl commands from Linux 4.8.
361 * Added decoding of new syscalls on sh and sh64.
362 * Added RISC-V architecture support.
365 * Marked io_setup and io_destroy as memory mapping related syscalls.
366 * Fixed leakage of placeholder descriptors to tracees.
367 * Fixed printing of mode_t, umode_t, and umask types.
368 * Fixed decoding of iovec arrays without a limit on total data size.
369 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
370 and ipc family syscalls.
371 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
372 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
374 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
375 * Fixed decoding of struct stat64 on sparc64.
376 * Fixed decoding of uid and gid-related syscalls on sparc64.
377 * Fixed decoding of the forth argument of semctl syscall on sparc64.
378 * Fixed values of tty ioctl constants on sparc64.
379 * Fixed sparc personality support on sparc64.
381 Noteworthy changes in release 4.13 (2016-07-26)
382 ===============================================
385 * Implemented a general netlink socket parser.
386 * Enhanced decoding of socket addresses.
387 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
388 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
389 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
390 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
391 and *_MAGIC constants.
392 * Updated lists of ioctl commands from Linux 4.7.
395 * Fixed decoding of pid_t argument of prlimit64 syscall.
396 * Fixed sign extension issues in the parser of struct rusage.
397 * Fixed race condition in decoding of timeout argument of recvmmsg and
398 rt_sigtimedwait syscalls.
399 * Fixed build with fresh linux kernel headers.
401 Noteworthy changes in release 4.12 (2016-05-31)
402 ===============================================
405 * Implemented simultaneous use of -p option and tracing of a command.
406 (addresses Debian bug #549942).
407 * Implemented caching of netlink conversations to reduce amount of time
408 spent in decoding socket details in -yy mode.
409 * Implemented -yy mode decoding of protocol:portid pairs associated with
410 netlink socket descriptors.
411 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
412 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
414 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
415 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
416 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
417 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
418 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
419 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
420 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
421 statfs64, tgkill, waitid, and xattr family syscalls.
422 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
423 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
424 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
425 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
426 * Added decoding of fadvise64 and fadvise64_64 on s390.
427 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
428 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
429 * Updated lists of ioctl commands from Linux 4.6.
432 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
433 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
434 * Fixed decoding of mlock2 syscall on sparc.
435 * Fixed decoding of osf_shmat syscall on alpha.
436 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
437 (addresses Debian bug #485979 and Fedora bug #1298294).
438 * Fixed decoding of preadv syscall in case of short read.
439 * Fixed decoding and dumping of readv syscall in case of short read.
440 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
441 * Fixed decoding of mincore syscall's last argument.
442 * Fixed remaining errors in mapping between syscall numbers and numbers
443 of syscall arguments.
444 * Applied various fixes to strace-graph script.
446 Noteworthy changes in release 4.11 (2015-12-21)
447 ===============================================
449 * Changes in behavior
450 * Some syscalls have different names depending on architecture and
451 personality. In these cases, syscall filtering and printing now
452 consistently uses the names that match corresponding __NR_* kernel
453 macros of the tracee's architecture and personality.
454 * Added strace prefix to all diagnostic messages.
457 * Enhanced and extended test suite.
458 * Implemented reliable tracing of processes whose personality differs
459 from the personality of strace, fixed decoding of 32-bit personality
460 syscalls on 64-bit architectures.
461 * When some data referenced by syscall arguments is irrelevant or cannot
462 be read from tracee's memory, strace now prints its address consistently.
463 * When a syscall is restarted using restart_syscall mechanism, strace now
464 shows the syscall name on architectures that expose this information.
465 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
466 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
467 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
468 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
469 * Optimized decoding of indirect socket syscalls.
470 * Implemented decoding of nanoseconds along with seconds in stat family
471 syscalls (addresses Fedora bug #1251176).
472 * Implemented decoding of struct statfs.f_flags in statfs syscall.
473 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
475 * Implemented decoding of indirect syscall on mips o32.
476 * Implemented decoding of IPPROTO_IP control messages.
477 * Implemented decoding of setsockopt syscall multicast arguments.
478 * Enhanced decoding of struct sigevent.
479 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
480 and v4l2 ioctl syscall arguments.
481 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
482 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
483 sendfile, setsockopt, and shmctl syscalls.
484 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
485 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
486 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
487 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
488 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
489 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
491 * Added Nios II architecture support.
492 * Added new syscall entries to match Linux 4.4.
495 * Fixed potential short read of strings from tracee's memory.
496 * Fixed -qq option in conjunction with -o option.
497 * Fixed filtering of <unavailable> syscalls.
498 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
499 with 64-bit aligned structures.
500 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
501 syscall flags arguments.
502 * Fixed decoding of 4th argument of clock_nanosleep syscall.
503 * Fixed decoding of getpagesize syscall on m68k.
504 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
505 * Fixed decoding of timezone argument of gettimeofday and settimeofday
507 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
509 * Fixed decoding of pipe syscall on alpha and mips.
510 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
511 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
512 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
514 * Fixed decoding of 4th argument of semctl indirect syscall.
515 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
516 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
517 * Fixed decoding of struct dirent on x32.
518 * Fixed decoding of times syscall return value on mips n32 and x32.
519 * Fixed decoding of path argument of umount2 syscall
520 (addresses Debian bug #785050).
521 * Worked around a kernel bug in tracing privileged executables.
522 * Fixed various errors in mapping between syscall numbers and associated
523 information like the number of syscall arguments, the name of syscall,
526 Noteworthy changes in release 4.10 (2015-03-06)
527 ===============================================
530 * Added -yy option to print protocol and address information associated with
532 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
533 recvmsg, sendmmsg, and recvmmsg syscalls.
534 * Implemented full 32-bit decoding of ioctl commands
535 (addresses Debian bug #692913 and Fedora bug #902788).
536 * Implemented PTRACE_GETREGS API support on ia64.
537 * Implemented PTRACE_GETREGS API support on mips.
538 * Implemented PTRACE_GETREGSET API support on s390/s390x.
539 * Implemented decoding of getrandom and seccomp syscalls.
540 * Implemented full decoding of 64-bit capability sets.
541 * Implemented decoding of all prctl commands.
542 * Implemented decoding of parametrized ioctl commands.
543 * Implemented decoding of evdev ioctl commands.
544 * Implemented decoding of v4l ioctl commands.
545 * Implemented decoding of SG_IO v4 ioctl commands.
546 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
547 * Implemented decoding of FALLOC_FL_* fallocate flags.
548 * Implemented decoding of rt_sigreturn signal mask on aarch64,
550 * Enhanced socket decoder to support bluetooth sockets.
551 * Enhanced decoding of unlisted ioctl commands.
552 * Enhanced decoding of getsockopt and setsockopt syscall.
553 * Enhanced decoding of sysinfo syscall.
554 * Enhanced decoding of struct cmsghdr.
555 * Enhanced decoding of wait status.
556 * Enhanced aio support on non-x86 architectures by using external libaio.h.
557 * Added O_TMPFILE to the list of recognized open mode flags.
558 * Updated the list of filesystem type constants that is used in decoding
559 statfs family syscalls.
560 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
562 * Updated lists of signal constants from Linux 3.19.
563 * Updated lists of errno constants from Linux 3.19.
564 * Updated lists of ioctl commands from Linux 3.9.
565 * Added new syscall entries to match Linux 3.19.
568 * Fixed various errors in mapping between syscall numbers and associated
569 information like the number of syscall arguments, the name of syscall,
571 * Fixed quoting issues in printing descriptors, filenames, network interface
572 names, struct utsname members, device/volume names of BLK* ioctl commands.
573 * Fixed uid_t/git_t decoding.
574 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
575 * Fixed potential open flags truncation on some architectures.
576 * Fixed decoding of struct ifreq.ifr_name.
577 * Fixed decoding of SIOCSIFNAME ioctl command.
578 * Fixed decoding of RENAME_* renameat2 flags.
579 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
580 * Fixed decoding of indirect ipc subcalls on some architectures.
581 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
582 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
583 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
584 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
585 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
586 sparc, sparc64, mips, and s390.
587 * Fixed instruction pointer output (-i option) on architectures that support
588 several personalities.
589 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
591 * Fixed build on systems where struct sigaction has no sa_restorer member.
592 * Fixed build with uclibc and musl libc.
595 * Linux kernel >= 2.5.46 is required.
596 Older versions without a decent PTRACE_SETOPTIONS support will not work.
597 * On mips, linux kernel >= 2.6.15 is required.
598 Older versions without a decent PTRACE_GETREGS support will not work.
599 * On s390 and s390x, linux kernel >= 2.6.27 is required.
600 Older versions without a decent PTRACE_GETREGSET support will not work.
602 Noteworthy changes in release 4.9 (2014-08-15)
603 ==============================================
605 * Changes in behavior
606 * Disabled OABI support on ARM EABI systems by default,
607 added --enable-arm-oabi option to enable it at configure time.
610 * Added experimental -k option to print stack trace after each traced syscall.
611 * Added -w option to produce stats on syscall latency.
612 (addresses Debian bug #457497).
613 * Added ARC architecture support.
614 * Added PTRACE_GETREGS API support on PowerPC.
615 * Enhanced Bionic libc and musl libc support.
616 * Enhanced tracing of x86 personality processes on x86_64 and x32.
617 * Enhanced tracing of ARM personality processes on AArch64.
618 * Enhanced 32/64bit personality detection on PowerPC.
619 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
620 renameat2, and request_key syscalls.
621 * Robustified decoding of select, pselect, and io_submit syscalls.
622 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
623 setdomainname, sethostname, setns, and sync_file_range syscalls.
624 * Enhanced decoding of signal bitmasks.
625 * Enhanced decoding of file descriptors.
626 * Enhanced siginfo_t decoding.
627 * Enhanced PF_NETLINK decoding.
628 * Updated CLOCK_* constants
629 (addresses Fedora bug #1088455).
630 * Added new syscall entries to match Linux 3.16.
633 * Added shmat and shmdt to the set of memory mapping related syscalls.
634 * Fixed detaching from stopped processes.
635 * Fixed fanotify_mark decoding on 32bit architectures.
636 * Fixed offset decoding in preadv and pwritev syscalls.
637 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
638 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
639 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
640 (addresses Fedora bug #993384).
641 * Miscellaneous corrections in the manual page.
642 (Addresses Debian bug #725987).
644 Noteworthy changes in release 4.8 (2013-06-03)
645 ==============================================
647 * Changes in behavior
648 * In case of normal strace termination, when the trace output is
649 redirected to a pipe, strace now closes it and waits for the pipe
650 process termination before exit.
653 * Implemented tracing using PTRACE_SEIZE API (when available).
654 * Implemented more reliable PTRACE_GETREGSET-based process personality
655 detection on x86-64 and x32 (when available).
656 * Added -e trace=memory option for tracing memory mapping related syscalls.
657 * Documented -b option.
658 * Allowed exit status messages to be suppressed by giving -q option twice.
659 * Added AArch64 architecture support
660 (addresses Debian bug #693074 and Fedora bug #969858).
661 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
662 * Added tilegx personality support for Tile.
663 * Enhanced support of NOMMU architectures.
664 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
666 * Added new syscall entries to match Linux 3.9.
667 * Regenerated the list of common ioctl names from Linux 3.9.
668 * Updated the list of errno constants.
669 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
670 PTRACE_O_*, and TCP_* constants.
671 * Implemented decoding of UBI ioctls.
672 * Removed redundant "*32" ioctl names.
675 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
676 (addresses Fedora bug #659382).
677 * Fixed kernel release string parsing
678 (addresses Debian bug #702309).
679 * Fixed decoding of *xattr syscalls
680 (addresses Fedora bug #885233).
681 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
682 (addresses Fedora bug #912790).
683 * Fixed tracing forks on SPARC.
684 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
685 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
686 and truncate64 syscalls.
687 * Fixed categories of multiple syscalls on most of supported architectures.
688 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
689 * Fixed decoding of multiple 32-bit personality syscalls on x32.
690 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
691 S390x, and Tile architectures.
692 * Fixed semtimedop decoding on S390x.
693 * Fixed sram_alloc decoding on Blackfin.
694 * Fixed build when process_vm_readv is a stab.
695 * Fixed build with older versions of libaio.h.
697 Noteworthy changes in release 4.7 (2012-05-02)
698 ==============================================
700 * Changes in behavior
701 * strace no longer suspends waitpid until there is a child
702 for waitpid'ing process to collect status from.
703 * strace no longer detaches from a tracee which is supposed
705 * strace now issues a new message: "+++ exited with EXITCODE +++"
706 which shows exact moment strace got exit notification,
707 analogous to existing "+++ killed by SIG +++" message.
710 * Added x32 personality support (x86_64 architecture).
711 * Added -y and -P options to print file descriptor paths and
712 filter by those paths.
713 * Added -I option to control strace interactivity.
714 * Allowed -p option to take comma or whitespace-separated list of PIDs.
715 * Added strace_log_merge script helper to merge timestamped "strace -ff"
717 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
718 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
719 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
720 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
721 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
722 listxattr, setrlimit and swapon syscalls.
723 * Implemented decoding of loop and mtd ioctls.
724 * Added syscall entries for new linux syscalls.
725 * Added syscall entries for direct socket system calls on powerpc.
726 * Updated the list of errno constants.
727 * Updated lists of MSG_*, STA_*, and TCP_* constants.
728 * Regenerated the list of ioctl names from Linux 3.3.
729 * Enhanced switching between processes with different personalities.
730 * Enhanced signals reporting by using short signal names.
731 * Made ERESTART* messages more descriptive.
732 * Made parsing of numbers from strings more robust.
733 * Added support for compat_statfs64 and statfs64.f_flags.
734 * Changed read of data blocks to use single process_vm_readv syscall
735 (when available) instead of several PTRACE_PEEKDATA operations.
736 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
737 operation instead of several PTRACE_PEEKUSER operations.
738 * Applied various optimizations to make strace work faster.
741 * Implemented proper handling of real SIGTRAPs on kernels supporting
742 PTRACE_O_TRACESYSGOOD.
743 (Addresses Fedora bug #162774).
744 * Fixed sockaddr_un.sun_path name in decoded output.
745 (Addresses Debian bug #554946).
746 * Fixed to avoid potential core file clobbering on exit.
747 (Addresses Debian bug #656398).
748 * Fixed a typo in documentation.
749 (Addresses Debian bug #653309).
750 * Fixed decoding of timer id returned by timer_create.
751 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
752 * Fixed *at syscalls flags decoding.
753 * Fixed ARM EABI 64-bit syscall's arguments decoding.
754 * Fixed semtimedop decoding on s390.
755 * Fixed osf_sigprocmask decoding on alpha.
756 * Fixed ipc and socket subcall decoding on several architectures.
757 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
758 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
759 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
760 * Corrected io_* syscall entries on ARM.
761 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
762 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
763 * Fixed build when libaio-devel is not available.
764 * Fixed configure checks for PTRACE_* constants.
765 * Fixed compilation warnings remained on several architectures.
768 * Removed all non-Linux code. After years of neglect, that dead code
769 just hampered further strace development.
770 * Linux kernel >= 2.6.18 is recommended. Older versions might still
771 work but they haven't been thoroughly tested with this release.
773 Noteworthy changes in release 4.6 (2011-03-15)
774 ==============================================
776 * Changes in behavior
777 * Print diagnostic information about changes in personality mode to
778 standard error instead of standard output.
781 * Implemented a new method of following clone, fork, and vfork
782 syscalls using the Linux kernel's explicit facilities for tracing
783 creation of threads and child processes.
784 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
785 * Implemented decoding of TLS syscalls on m68k.
786 * Implemented biarch support on powerpc64.
787 * Implemented biarch support for getrlimit() and setrlimit().
788 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
789 * Implemented SOL_SCTP socket options decoding.
790 * Added HDIO_* ioctl names.
791 (Addresses Debian bug #450953).
792 * Added LOOP_* ioctl names.
793 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
794 to match Linux 2.6.37.
795 * Updated the list of IPPROTO_* constants to match netinet/in.h.
796 * Implemented decoding of HDIO_* and BLK* ioctls.
797 * Added MicroBlaze architecture support.
798 * Added new syscall entries to match Linux 2.6.37.
799 * Regenerated list of ioctl names from Linux 2.6.37.
800 * Enhanced signal notification decoding.
801 * Documented -C and -D options.
804 * Fixed fetching syscall arguments on m68k.
805 * Fixed an error when judging whether a process has children.
806 * Fixed get/set_robust_list syscall numbers for powerpc.
807 * Fixed a corner case in printing clone flags.
808 * Fixed cross-compiling issues.
809 * Fixed build issues on powerpc64, SH and SPARC.
810 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
811 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
812 fanotify_init, and fanotify_mark syscalls.
813 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
814 * Fixed biarch support in IO dumping.
815 * Fixed raw exit_group decoding.
816 * Fixed decoding of file descriptors on 64-bit architectures.
817 * Fixed a corner case in waitpid handling.
818 (Addresses Red Hat bug #663547).
819 * Fixed stat64 decoding on mips
820 (Addresses Debian bug #599028).
821 * Fixed misleading italics in the manual page.
822 (Addresses Debian bug #589323).
824 Noteworthy changes in release 4.5.20 (2010-04-13)
825 =================================================
828 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
829 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
830 rt_tgsigqueueinfo, perf_event_open.
831 * Enhanced decoding of recently added syscalls on non-x86 architectures
832 by replacing a bare decoder with elaborate parsers enabled earlier
834 * Implemented -C option to combine regular and -c output.
835 (Addresses Debian bug #466196)
836 * Enhanced decoding of mbind and mremap syscalls.
837 * Enhanced SOL_PACKET socket options decoding.
838 * Regenerated list of ioctl names from linux 2.6.33.
839 * Added TILE architecture support.
842 * Fixed build with Linux kernel headers 2.6.32-rc5+.
843 (Addresses Debian bug #560516 and Fedora bug #539044)
844 * Fixed build on mips.
845 * Fixed handling of Linux systems without struct statfs64.
846 * Fixed reporting signal mask by sigreturn on powerpc.
847 * Fixed potential stack buffer overflow in select decoder.
848 (Addresses Fedora bug #556678)
849 * Corrected msgsnd indirect ipccall decoding.
850 * Corrected decoding of 64bit syscalls.
851 (Addresses Debian bug #570603)
852 * Corrected getsockopt decoding on architectures where
853 sizeof(long) > sizeof(int).
854 (Addresses Debian bug #494844)
855 * Corrected decoding of epoll_pwait.
856 (Addresses Debian bug #513014)
857 * Corrected handling of killed threads.
859 Noteworthy changes in release 4.5.19 (2009-10-21)
860 =================================================
862 * Changes in behavior
863 * When command exits, strace now exits with the same exit status.
864 If command is terminated by a signal, strace terminates itself
865 with the same signal, so that strace can be used as a wrapper
866 process transparent to the invoking parent process.
867 When using -p option, the exit status of strace is zero unless
868 there was an unexpected error in doing the tracing.
869 (Addresses Fedora bug #105371 and Debian bug #37665)
872 * Implemented decoding of new Linux syscalls: accept4, dup3,
873 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
874 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
875 * Implemented decoding of accept4 socketcall.
876 * Enhanced prctl decoding.
877 * Enhanced nanosleep decoding.
878 * Enhanced ptrace decoding.
879 * Enhanced futex decoding.
880 * Enhanced CAP_* decoding.
881 * Enhanced SIOCS* ioctls decoding.
882 * Enhanced fcntl F_* flags decoding.
883 * Enhanced semop/semtimedop decoding.
884 * Updated ARM architecture support.
885 * Added Blackfin architecture support.
886 * Added AVR32 architecture support.
887 * Added CRIS architecture support.
888 * Made strace detect when traced process suddenly disappeared.
891 * Fixed syscall numbers for tee and sync_file_range.
892 (Addresses Debian bug #503124)
893 * Fixed several bugs in strings decoder, including potential heap
895 (Addresses Fedora bugs #470529, #478324 and #511035)
896 * Marked sendfile(2) as a network syscall.
897 (Addresses Debian bug #509499)
898 * Fixed accept(2) decoding.
899 (Addresses Debian bug #507573)
900 * Fixed sigtimedwait(2) decoding.
901 * Fixed build on ARM EABI.
902 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
903 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
904 (Addresses Red Hat bug #471169)
905 * Fixed display of 32-bit argv array on 64-bit architectures.
906 (Addresses Fedora bug #519480)
907 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
908 * Fixed HPPA architecture support.
909 (Addresses Debian bugs #437928 and #546619)
914 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
915 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
920 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
921 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
922 * Improved output for prctl system call on Linux.
923 * Improved support for Linux/ARM.
924 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
929 * Improved output for delete_module, futex, and mbind system calls on Linux.
930 * Improved output for SG_IO ioctls on Linux.
931 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
932 eventfd, getcpu, epoll_pwait.
937 * Several biarch improvements.
938 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
939 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
944 * Accept numeric system calls in -e.
949 * Introduce "-e trace=desc".
954 * Better x86-64 support for IA32 processes.
955 * Update PowerPC system calls.
956 * Better printing for Linux aio system calls.
960 * Quick fix release for build issues.
961 * One fix for Linux/ARM system call table.
966 * Print fault address for SIGSEGV/SIGBUS signals when available.
971 * Improve socket ioctl printing.
972 * Update Linux/IA64 syscall list.
973 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
974 * Improve mount flags printing.
975 * Support symbolic printing of x86_64 arch_prctl parameters.
980 * Update syscall tables for Alpha, ARM, HPPA.
981 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
982 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
983 * Improve ioctl command name matching.
984 * Print RTC_* ioctl structure contents.
985 * Support newer RLIMIT_* values.
986 * Print struct cmsghdr details in sendmsg.
991 * Print attribute values in *xattr system calls on Linux.
992 * Include pread and pwrite calls in -e read and -e write tracing.
993 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
994 * Print clock_t values symbolically in Linux clock_* system calls.
998 * Bug fixes, Linux ioctl updates.
999 * David Miller contributed support for Linux/SPARC64.
1007 * Update Linux ioctl lists.
1008 * Update PF_* and AF_* value lists.
1009 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1014 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1015 * Handle new mq_* system calls in Linux 2.6.6 and later.
1020 * Report some new VM_* bit values on Linux.
1021 * Better output for Linux sched_* system calls.
1026 * Display multiple ioctl name matches on Linux.
1030 * New port to AMD's x86-64 architecture. One strace binary can
1031 handle both new x86-64 and old i386 processes.
1032 * Fixed support for LFS64 calls.
1033 * New switch -E to add/remove environment variables for the command.
1034 * Merged s390/s390x port.
1035 * Trace an unbounded number of processes.
1036 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1037 * Fixed bugs with attach/detach leaving things stopped.
1038 * Fixed traced process seeing ECHILD despite live, traced children
1039 in waitpid calls with WNOHANG.
1040 * Stuart Menefy contributed a port to Linux/SH.
1041 * Stephen Thomas contributed a port to Linux/SH64.
1042 * Many other bug fixes.
1046 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1047 * Fix the ioctl setup for Linux, turned out it did not really work.
1048 Improve the ioctl extractor as well so we decode some more ones.
1052 * compile fixes for Linux/mips
1056 * Linux ia64 and hppa ports added
1057 * The usual Linux syscall updates (includes 32bit uid/gid support),
1058 * Linux ioctl list updated
1059 * Support IPv6 scope ids
1060 * FreeBSD/i386 port added
1061 * UnixWare and Solaris updates
1062 * Better support for tracing multithreaded processes in Linux
1066 * Compiles on glibc2.0 systems again
1067 * Linux/S390 port added
1068 * The usual Linux syscall updates
1069 * we can follow fork on arm now
1073 * Linux/MIPS port added
1074 * Lots of Linux updates again
1075 * Improved IPv6 support
1081 * Compiles on glibc2.0 systems again
1085 * Get stat structure properly on Linux 64bit archs
1086 * Personalities work again
1087 * Compile correctly on SunOS again
1093 * Linux (ultra)sparc fixes
1100 * add support for more Linux architectures (powerpc, sparc, arm)
1101 * support lots more Linux syscalls
1102 * fix signal handling
1103 * add IPX and IPIP support
1104 * check stray syscall after execv
1105 * fix hanging children
1107 Changes in version 3.1
1108 ======================
1110 * Irix5 is supported
1111 * Linux 68k is supported
1112 * Linux alpha is supported
1113 * configure is upgraded to autoconf 2.x
1114 * using -f in combination with -e now works correctly
1115 * output can be piped to a program
1116 * tracing setuid programs works better
1117 * it is now reasonable to install strace setuid to root in some circumstances
1118 * new useful tracing names like file and process to trace whole
1119 classes of system calls, e.g. -efile traces all system calls that
1120 take a file name as an argument
1121 * IPC calls on SunOS 4.1.x are decoded
1122 * Linux program memory is reliably dereferenced
1123 * Linux decodes at least the name of all syscalls as of pre2.0.4
1124 * various cosmetic changes and bug fixes
1126 Changes from versions 2.x to version 3.0
1127 ========================================
1129 * filename arguments are neither abbreviated nor stringified
1130 * string arguments are now true C strings using octal instead of hex by default
1131 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1132 * by default the output for multiple processes now goes into one file
1133 * all structures, vectors, bitsets, etc. use consistent output formats
1134 * the -c option now means count calls, -i does what the old -c used to do
1136 New Features in version 3.0
1137 ===========================
1139 * non-ascii strings can be optionally printed entirely in hex
1140 * the output format is readable when multiple processes are generating output
1141 * exit values are printed in an alignment column
1142 * is is possible to suppress messages about attaching and detaching
1143 * various tracing features can be enabled on a per syscall/signal/desc basis
1144 * selective tracing of syscalls
1145 * selective printing of syscall structures
1146 * selective abbreviation of long structures on a per syscall basis
1147 * selective printing of raw syscall arguments and results
1148 * selective tracing of signals
1149 * selective dumping of all I/O read from file descriptors
1150 * selective dumping of all I/O written to file descriptors
1151 * optional counting of time, calls, and errors for each syscall