1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
4 Noteworthy changes in release 4.21 (2018-02-13)
5 ===============================================
8 * Warning is now issued when -F option is used.
9 * Warning is now issued when a tracee with unsupported personality
11 * Unknown syscall numbers are now printed in hexadecimal form.
14 * Implemented decoding of netlink descriptor attributes as file descriptors.
15 * Implemented decoding of hugetlb page size selection flags.
16 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
17 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
18 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
19 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
20 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
21 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
23 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
24 * Implemented decoding of riscv_flush_icache syscall.
25 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
27 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
28 * Print values returned by mq_open syscall and first arguments
29 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
31 * Added decoding of get_tls syscall on arm.
32 * Added -e trace=%pure option for tracing system calls with no arguments that
34 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
35 SHM_*, and TCP_* constants.
36 * Added manual page for the strace-log-merge command.
37 * Updated lists of ioctl commands from Linux 4.15.
38 * Implemented biarch support for s390x.
39 * Implemented an optional support for symbol demangling in strace -k output
40 (activated by --with-libiberty configure option).
41 * Information about availability of demangling and reliable personality
42 decoding (on architectures with multiple personalities) is now available
44 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
45 powerpc and powerpc64.
46 * Enhanced manual page.
49 * Fixed multi-personality support in cross builds.
50 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
51 syscalls to %desc tracing set.
52 * Fixed path tracing support for mmap syscalls with indirect arguments and
53 for old select syscall.
54 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
55 * Fixed open mode flags decoding.
56 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
57 * Error counts that exceed one billion are now printed correctly in call
59 * Fixed call summary header for x32 personality.
60 * Changes of tracee personalities are reported more reliably.
61 * Fixed the case when strace attaches to a tracee being inside exec and its
62 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
63 which messed up all the syscall state tracking.
64 * Fixed printing of higher 32 bits of the return value for x32 personality.
67 * A C compiler that supports "for" loop initial declarations is now required.
68 * Inability to configure multiple personality support on architectures where
69 multiple personalities are supported leads to configuration failure during
70 build now. Use --enable-mpers=check to revert to the old behaviour.
71 * Build-time requirement for the mpers support has been lowered from gawk 4
73 * Removed incomplete and non-functional support for the CRIS architecture.
74 * Removed incomplete and unused support for IA-32 mode on the IA-64
77 Noteworthy changes in release 4.20 (2017-11-13)
78 ===============================================
81 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
82 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
84 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
85 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
87 * Added decoding of statx syscall on hppa.
88 * Updated lists of ioctl commands from Linux 4.14.
91 * Fixed powerpc personality support on powerpc64.
93 Noteworthy changes in release 4.19 (2017-09-05)
94 ===============================================
96 * Changes in behaviour
97 * Changed formatting of personality names on tile architecture in order
98 to make it in line with other multi-personality architectures.
99 * Changed field output order in struct v4l2_requestbuffers to improve in/out
101 * Changed handling of multiple signal= specifications in an injection
102 expression: multiple specification now leads to error instead of implicit
103 usage the last specification.
106 * Enhanced decoding of optlen argument of getsockopt syscall.
107 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
108 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
109 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
110 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
111 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
112 of setsockopt syscall.
113 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
114 (KDF parameters decoding).
115 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
116 * Enhanced decoding of UFFDIO_API ioctl command.
117 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
118 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
119 * Implemented decoding of linux socket filter programs specified
120 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
121 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
122 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
123 * Implemented NETLINK_SELINUX protocol specific decoding.
124 * Implemented decoding of netlink message ack flags.
125 * Implemented decoding of nlmsgerr netlink attributes.
126 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
127 * Implemented decoding of crypto_user_alg netlink attributes
129 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
130 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
132 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
133 * Improved handling of unexpected tracees (the ones that cloned with
134 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
135 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
136 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
137 * Added decoding of arch_prctl syscall on x86.
138 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
139 copy_file_range, preadv2, pwritev2, and statx on alpha.
140 * Added decoding of statx syscall on microblaze.
141 * Added decoding of s390_guarded_storage syscall on s390.
142 * Updated lists of ioctl commands from Linux 4.13.
143 * Enhanced manual page.
146 * Fixed printing of group_req structure on non-native personalities.
147 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
149 * Fixed formatting of nul-terminated strings which have kernel-imposed size
151 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
153 * Fixed build warnings on Android mips64.
154 * Fixed unused function "is_negated_errno" build warning when built
156 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
157 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
158 to use if Linux kernel has commit v4.10-rc1~114^2~2.
159 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
160 and inotify_init syscalls.
161 * Fixed personality switch printing on sparc64 and risc-v.
163 Noteworthy changes in release 4.18 (2017-07-05)
164 ===============================================
167 * Implemented decoding of SCM_TIMESTAMP* control messages.
168 * Implemented decoding of netlink NLMSG_DONE messages.
169 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
170 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
171 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
172 * Implemented decoding of NETLINK_GENERIC protocol families.
173 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
174 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
175 * Implemented basic decoding of netlink attributes.
176 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
177 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
178 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
179 netlink attributes of NETLINK_SOCK_DIAG.
180 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
181 SO_*, V4L2_*, and prctl ARCH_* constants.
182 * Updated lists of ioctl commands from Linux 4.12.
185 * In interactive mode (-I2), those signals that were blocked at startup
186 will remain blocked for the whole period of strace execution.
187 * strace no longer resets SIGCHLD handler in tracees to the default action.
188 * When traced command is terminated by a blocked signal, strace unblocks
189 that signal to ensure its own termination with the same signal.
190 * Fixed corner cases in decoding of old sigaction syscall.
191 * Fixed build with old kernel headers on mips.
192 * Fixed build on aarch64 and tile with glibc >= 2.26.
193 * Fixed build on arc and nios2.
195 Noteworthy changes in release 4.17 (2017-05-24)
196 ===============================================
198 * Changes in command line syntax
199 * Syscall classes specified in -e trace= option now have % prefix (like
200 -e trace=%process). Old style class names without leading % are still
201 supported, but considered deprecated now.
204 * Optimized syscall filtering.
205 * Improved representation of timestamps.
206 * Enhanced decoding of sched_setattr syscall.
207 * Added -e trace=%stat option for tracing variants of stat syscall.
208 * Added -e trace=%lstat option for tracing variants of lstat syscall.
209 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
211 * Added -e trace=%%stat option for tracing syscalls used for querying file
212 status information (stat, lstat, fstat, fstatat, statx, and their
214 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
216 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
218 * Added -e trace=%%statfs option for tracing syscalls used for querying file
219 system statistics information (statfs-like, fstatfs-like and ustat).
220 * Added -e trace=/regex option for filtering syscalls using regular
222 * Added support for prepending of question mark before syscall qualification
223 in -e trace expressions in order to suppress error in case no syscalls
224 matched the provided qualification.
225 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
226 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
227 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
229 * Implemented decoding of statx syscall.
230 * Implemented decoding of NS_* ioctl commands.
231 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
232 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
233 * Implemented decoding of NLMSG_ERROR netlink messages.
234 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
235 * Improved decoding of misplaced parts in DM_* ioctl commands.
236 * Updated lists of ioctl commands from Linux 4.11.
239 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
240 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
241 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
242 powerpc64, sh, sh64, sparc, and sparc64.
243 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
244 * Fixed decoding of netlink messages received within struct msghdr.
245 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
246 argument of sched_getattr syscall being not quite 32-bit.
247 * Fixed corner cases of printing inaccessible times argument of utimes
248 and futimesat syscalls.
250 Noteworthy changes in release 4.16 (2017-02-14)
251 ===============================================
254 * Implemented syscall return value injection (-e inject=SET:retval= option).
255 * Implemented signal injection (-e inject=SET:signal= option).
256 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
257 * Implemented decoding of all SG_* ioctl commands.
258 * Implemented decoding of ustat syscall.
259 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
260 and BPF_PROG_DETACH commands of bpf syscall.
261 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
262 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
264 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
265 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
266 * Updated lists of ioctl commands from Linux 4.10.
267 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
271 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
272 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
273 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
274 and pwritev* syscalls on x32.
275 * Fixed printing of string arguments of getxattr and setxattr syscalls
276 when -s option is used to limit the printed string size.
277 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
279 * Fixed decoding of SG_* and LOOP_* ioctl commands.
280 * Fixed build on mips with musl libc.
281 * Fixed cross-building of ioctlsort.
282 * Applied minor formatting fixes to the manual page.
284 Noteworthy changes in release 4.15 (2016-12-14)
285 ===============================================
287 * Changes in behavior
288 * Time stamps are now printed according to ISO 8601.
289 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
290 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
291 syscalls is now formatted as an array.
294 * Implemented syscall fault injection (-e fault=... option).
295 * Implemented decoding of DM_* ioctl commands.
296 * Implemented decoding of attr parameter of perf_event_open syscall.
297 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
298 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
299 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
301 * Implemented PTRACE_GETREGS API support on m68k.
302 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
303 and V4L2_* constants.
304 * Updated lists of ioctl commands from Linux 4.9.
305 * Added decoding of recently added syscalls on arc, x32, and xtensa.
306 * Enhanced manual page.
309 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
310 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
311 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
312 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
313 setgroups, setns, unshare, and utimes syscalls.
314 * Fixed handling of verbose flag in printing of controls array
315 of struct v4l2_ext_controls.
316 * Fixed omission of field names in the output of capability, sigaction,
317 sigevent, statfs, timespec, timeval, and utimbuf structures.
318 * Fixed printing of unknown syscalls in siginfo structure.
319 * Fixed decoding of ioctl constants on m68k.
320 * Fixed cris architecture support.
321 * Fixed cross build when host compiler does not support the same
322 set of warning flags as the cross compiler.
323 * Fixed build on SLE10 and SLE11.
325 Noteworthy changes in release 4.14 (2016-10-04)
326 ===============================================
328 * Changes in behavior
329 * When using -p option without a command and no processes has been attached,
330 strace exits with exit status 1.
333 * Added printing of the mode argument of open and openat syscalls
334 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
335 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
336 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
337 and aio family syscalls.
338 * Implemented fetching of the 7th subcall argument on mips o32.
339 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
341 * Updated lists of ioctl commands from Linux 4.8.
342 * Added decoding of new syscalls on sh and sh64.
343 * Added RISC-V architecture support.
346 * Marked io_setup and io_destroy as memory mapping related syscalls.
347 * Fixed leakage of placeholder descriptors to tracees.
348 * Fixed printing of mode_t, umode_t, and umask types.
349 * Fixed decoding of iovec arrays without a limit on total data size.
350 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
351 and ipc family syscalls.
352 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
353 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
355 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
356 * Fixed decoding of struct stat64 on sparc64.
357 * Fixed decoding of uid and gid-related syscalls on sparc64.
358 * Fixed decoding of the forth argument of semctl syscall on sparc64.
359 * Fixed values of tty ioctl constants on sparc64.
360 * Fixed sparc personality support on sparc64.
362 Noteworthy changes in release 4.13 (2016-07-26)
363 ===============================================
366 * Implemented a general netlink socket parser.
367 * Enhanced decoding of socket addresses.
368 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
369 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
370 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
371 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
372 and *_MAGIC constants.
373 * Updated lists of ioctl commands from Linux 4.7.
376 * Fixed decoding of pid_t argument of prlimit64 syscall.
377 * Fixed sign extension issues in the parser of struct rusage.
378 * Fixed race condition in decoding of timeout argument of recvmmsg and
379 rt_sigtimedwait syscalls.
380 * Fixed build with fresh linux kernel headers.
382 Noteworthy changes in release 4.12 (2016-05-31)
383 ===============================================
386 * Implemented simultaneous use of -p option and tracing of a command.
387 (addresses Debian bug #549942).
388 * Implemented caching of netlink conversations to reduce amount of time
389 spent in decoding socket details in -yy mode.
390 * Implemented -yy mode decoding of protocol:portid pairs associated with
391 netlink socket descriptors.
392 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
393 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
395 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
396 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
397 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
398 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
399 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
400 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
401 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
402 statfs64, tgkill, waitid, and xattr family syscalls.
403 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
404 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
405 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
406 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
407 * Added decoding of fadvise64 and fadvise64_64 on s390.
408 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
409 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
410 * Updated lists of ioctl commands from Linux 4.6.
413 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
414 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
415 * Fixed decoding of mlock2 syscall on sparc.
416 * Fixed decoding of osf_shmat syscall on alpha.
417 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
418 (addresses Debian bug #485979 and Fedora bug #1298294).
419 * Fixed decoding of preadv syscall in case of short read.
420 * Fixed decoding and dumping of readv syscall in case of short read.
421 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
422 * Fixed decoding of mincore syscall's last argument.
423 * Fixed remaining errors in mapping between syscall numbers and numbers
424 of syscall arguments.
425 * Applied various fixes to strace-graph script.
427 Noteworthy changes in release 4.11 (2015-12-21)
428 ===============================================
430 * Changes in behavior
431 * Some syscalls have different names depending on architecture and
432 personality. In these cases, syscall filtering and printing now
433 consistently uses the names that match corresponding __NR_* kernel
434 macros of the tracee's architecture and personality.
435 * Added strace prefix to all diagnostic messages.
438 * Enhanced and extended test suite.
439 * Implemented reliable tracing of processes whose personality differs
440 from the personality of strace, fixed decoding of 32-bit personality
441 syscalls on 64-bit architectures.
442 * When some data referenced by syscall arguments is irrelevant or cannot
443 be read from tracee's memory, strace now prints its address consistently.
444 * When a syscall is restarted using restart_syscall mechanism, strace now
445 shows the syscall name on architectures that expose this information.
446 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
447 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
448 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
449 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
450 * Optimized decoding of indirect socket syscalls.
451 * Implemented decoding of nanoseconds along with seconds in stat family
452 syscalls (addresses Fedora bug #1251176).
453 * Implemented decoding of struct statfs.f_flags in statfs syscall.
454 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
456 * Implemented decoding of indirect syscall on mips o32.
457 * Implemented decoding of IPPROTO_IP control messages.
458 * Implemented decoding of setsockopt syscall multicast arguments.
459 * Enhanced decoding of struct sigevent.
460 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
461 and v4l2 ioctl syscall arguments.
462 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
463 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
464 sendfile, setsockopt, and shmctl syscalls.
465 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
466 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
467 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
468 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
469 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
470 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
472 * Added Nios II architecture support.
473 * Added new syscall entries to match Linux 4.4.
476 * Fixed potential short read of strings from tracee's memory.
477 * Fixed -qq option in conjunction with -o option.
478 * Fixed filtering of <unavailable> syscalls.
479 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
480 with 64-bit aligned structures.
481 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
482 syscall flags arguments.
483 * Fixed decoding of 4th argument of clock_nanosleep syscall.
484 * Fixed decoding of getpagesize syscall on m68k.
485 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
486 * Fixed decoding of timezone argument of gettimeofday and settimeofday
488 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
490 * Fixed decoding of pipe syscall on alpha and mips.
491 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
492 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
493 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
495 * Fixed decoding of 4th argument of semctl indirect syscall.
496 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
497 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
498 * Fixed decoding of struct dirent on x32.
499 * Fixed decoding of times syscall return value on mips n32 and x32.
500 * Fixed decoding of path argument of umount2 syscall
501 (addresses Debian bug #785050).
502 * Worked around a kernel bug in tracing privileged executables.
503 * Fixed various errors in mapping between syscall numbers and associated
504 information like the number of syscall arguments, the name of syscall,
507 Noteworthy changes in release 4.10 (2015-03-06)
508 ===============================================
511 * Added -yy option to print protocol and address information associated with
513 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
514 recvmsg, sendmmsg, and recvmmsg syscalls.
515 * Implemented full 32-bit decoding of ioctl commands
516 (addresses Debian bug #692913 and Fedora bug #902788).
517 * Implemented PTRACE_GETREGS API support on ia64.
518 * Implemented PTRACE_GETREGS API support on mips.
519 * Implemented PTRACE_GETREGSET API support on s390/s390x.
520 * Implemented decoding of getrandom and seccomp syscalls.
521 * Implemented full decoding of 64-bit capability sets.
522 * Implemented decoding of all prctl commands.
523 * Implemented decoding of parametrized ioctl commands.
524 * Implemented decoding of evdev ioctl commands.
525 * Implemented decoding of v4l ioctl commands.
526 * Implemented decoding of SG_IO v4 ioctl commands.
527 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
528 * Implemented decoding of FALLOC_FL_* fallocate flags.
529 * Implemented decoding of rt_sigreturn signal mask on aarch64,
531 * Enhanced socket decoder to support bluetooth sockets.
532 * Enhanced decoding of unlisted ioctl commands.
533 * Enhanced decoding of getsockopt and setsockopt syscall.
534 * Enhanced decoding of sysinfo syscall.
535 * Enhanced decoding of struct cmsghdr.
536 * Enhanced decoding of wait status.
537 * Enhanced aio support on non-x86 architectures by using external libaio.h.
538 * Added O_TMPFILE to the list of recognized open mode flags.
539 * Updated the list of filesystem type constants that is used in decoding
540 statfs family syscalls.
541 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
543 * Updated lists of signal constants from Linux 3.19.
544 * Updated lists of errno constants from Linux 3.19.
545 * Updated lists of ioctl commands from Linux 3.9.
546 * Added new syscall entries to match Linux 3.19.
549 * Fixed various errors in mapping between syscall numbers and associated
550 information like the number of syscall arguments, the name of syscall,
552 * Fixed quoting issues in printing descriptors, filenames, network interface
553 names, struct utsname members, device/volume names of BLK* ioctl commands.
554 * Fixed uid_t/git_t decoding.
555 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
556 * Fixed potential open flags truncation on some architectures.
557 * Fixed decoding of struct ifreq.ifr_name.
558 * Fixed decoding of SIOCSIFNAME ioctl command.
559 * Fixed decoding of RENAME_* renameat2 flags.
560 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
561 * Fixed decoding of indirect ipc subcalls on some architectures.
562 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
563 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
564 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
565 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
566 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
567 sparc, sparc64, mips, and s390.
568 * Fixed instruction pointer output (-i option) on architectures that support
569 several personalities.
570 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
572 * Fixed build on systems where struct sigaction has no sa_restorer member.
573 * Fixed build with uclibc and musl libc.
576 * Linux kernel >= 2.5.46 is required.
577 Older versions without a decent PTRACE_SETOPTIONS support will not work.
578 * On mips, linux kernel >= 2.6.15 is required.
579 Older versions without a decent PTRACE_GETREGS support will not work.
580 * On s390 and s390x, linux kernel >= 2.6.27 is required.
581 Older versions without a decent PTRACE_GETREGSET support will not work.
583 Noteworthy changes in release 4.9 (2014-08-15)
584 ==============================================
586 * Changes in behavior
587 * Disabled OABI support on ARM EABI systems by default,
588 added --enable-arm-oabi option to enable it at configure time.
591 * Added experimental -k option to print stack trace after each traced syscall.
592 * Added -w option to produce stats on syscall latency.
593 (addresses Debian bug #457497).
594 * Added ARC architecture support.
595 * Added PTRACE_GETREGS API support on PowerPC.
596 * Enhanced Bionic libc and musl libc support.
597 * Enhanced tracing of x86 personality processes on x86_64 and x32.
598 * Enhanced tracing of ARM personality processes on AArch64.
599 * Enhanced 32/64bit personality detection on PowerPC.
600 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
601 renameat2, and request_key syscalls.
602 * Robustified decoding of select, pselect, and io_submit syscalls.
603 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
604 setdomainname, sethostname, setns, and sync_file_range syscalls.
605 * Enhanced decoding of signal bitmasks.
606 * Enhanced decoding of file descriptors.
607 * Enhanced siginfo_t decoding.
608 * Enhanced PF_NETLINK decoding.
609 * Updated CLOCK_* constants
610 (addresses Fedora bug #1088455).
611 * Added new syscall entries to match Linux 3.16.
614 * Added shmat and shmdt to the set of memory mapping related syscalls.
615 * Fixed detaching from stopped processes.
616 * Fixed fanotify_mark decoding on 32bit architectures.
617 * Fixed offset decoding in preadv and pwritev syscalls.
618 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
619 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
620 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
621 (addresses Fedora bug #993384).
622 * Miscellaneous corrections in the manual page.
623 (Addresses Debian bug #725987).
625 Noteworthy changes in release 4.8 (2013-06-03)
626 ==============================================
628 * Changes in behavior
629 * In case of normal strace termination, when the trace output is
630 redirected to a pipe, strace now closes it and waits for the pipe
631 process termination before exit.
634 * Implemented tracing using PTRACE_SEIZE API (when available).
635 * Implemented more reliable PTRACE_GETREGSET-based process personality
636 detection on x86-64 and x32 (when available).
637 * Added -e trace=memory option for tracing memory mapping related syscalls.
638 * Documented -b option.
639 * Allowed exit status messages to be suppressed by giving -q option twice.
640 * Added AArch64 architecture support
641 (addresses Debian bug #693074 and Fedora bug #969858).
642 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
643 * Added tilegx personality support for Tile.
644 * Enhanced support of NOMMU architectures.
645 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
647 * Added new syscall entries to match Linux 3.9.
648 * Regenerated the list of common ioctl names from Linux 3.9.
649 * Updated the list of errno constants.
650 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
651 PTRACE_O_*, and TCP_* constants.
652 * Implemented decoding of UBI ioctls.
653 * Removed redundant "*32" ioctl names.
656 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
657 (addresses Fedora bug #659382).
658 * Fixed kernel release string parsing
659 (addresses Debian bug #702309).
660 * Fixed decoding of *xattr syscalls
661 (addresses Fedora bug #885233).
662 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
663 (addresses Fedora bug #912790).
664 * Fixed tracing forks on SPARC.
665 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
666 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
667 and truncate64 syscalls.
668 * Fixed categories of multiple syscalls on most of supported architectures.
669 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
670 * Fixed decoding of multiple 32-bit personality syscalls on x32.
671 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
672 S390x, and Tile architectures.
673 * Fixed semtimedop decoding on S390x.
674 * Fixed sram_alloc decoding on Blackfin.
675 * Fixed build when process_vm_readv is a stab.
676 * Fixed build with older versions of libaio.h.
678 Noteworthy changes in release 4.7 (2012-05-02)
679 ==============================================
681 * Changes in behavior
682 * strace no longer suspends waitpid until there is a child
683 for waitpid'ing process to collect status from.
684 * strace no longer detaches from a tracee which is supposed
686 * strace now issues a new message: "+++ exited with EXITCODE +++"
687 which shows exact moment strace got exit notification,
688 analogous to existing "+++ killed by SIG +++" message.
691 * Added x32 personality support (x86_64 architecture).
692 * Added -y and -P options to print file descriptor paths and
693 filter by those paths.
694 * Added -I option to control strace interactivity.
695 * Allowed -p option to take comma or whitespace-separated list of PIDs.
696 * Added strace_log_merge script helper to merge timestamped "strace -ff"
698 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
699 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
700 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
701 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
702 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
703 listxattr, setrlimit and swapon syscalls.
704 * Implemented decoding of loop and mtd ioctls.
705 * Added syscall entries for new linux syscalls.
706 * Added syscall entries for direct socket system calls on powerpc.
707 * Updated the list of errno constants.
708 * Updated lists of MSG_*, STA_*, and TCP_* constants.
709 * Regenerated the list of ioctl names from Linux 3.3.
710 * Enhanced switching between processes with different personalities.
711 * Enhanced signals reporting by using short signal names.
712 * Made ERESTART* messages more descriptive.
713 * Made parsing of numbers from strings more robust.
714 * Added support for compat_statfs64 and statfs64.f_flags.
715 * Changed read of data blocks to use single process_vm_readv syscall
716 (when available) instead of several PTRACE_PEEKDATA operations.
717 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
718 operation instead of several PTRACE_PEEKUSER operations.
719 * Applied various optimizations to make strace work faster.
722 * Implemented proper handling of real SIGTRAPs on kernels supporting
723 PTRACE_O_TRACESYSGOOD.
724 (Addresses Fedora bug #162774).
725 * Fixed sockaddr_un.sun_path name in decoded output.
726 (Addresses Debian bug #554946).
727 * Fixed to avoid potential core file clobbering on exit.
728 (Addresses Debian bug #656398).
729 * Fixed a typo in documentation.
730 (Addresses Debian bug #653309).
731 * Fixed decoding of timer id returned by timer_create.
732 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
733 * Fixed *at syscalls flags decoding.
734 * Fixed ARM EABI 64-bit syscall's arguments decoding.
735 * Fixed semtimedop decoding on s390.
736 * Fixed osf_sigprocmask decoding on alpha.
737 * Fixed ipc and socket subcall decoding on several architectures.
738 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
739 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
740 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
741 * Corrected io_* syscall entries on ARM.
742 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
743 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
744 * Fixed build when libaio-devel is not available.
745 * Fixed configure checks for PTRACE_* constants.
746 * Fixed compilation warnings remained on several architectures.
749 * Removed all non-Linux code. After years of neglect, that dead code
750 just hampered further strace development.
751 * Linux kernel >= 2.6.18 is recommended. Older versions might still
752 work but they haven't been thoroughly tested with this release.
754 Noteworthy changes in release 4.6 (2011-03-15)
755 ==============================================
757 * Changes in behavior
758 * Print diagnostic information about changes in personality mode to
759 standard error instead of standard output.
762 * Implemented a new method of following clone, fork, and vfork
763 syscalls using the Linux kernel's explicit facilities for tracing
764 creation of threads and child processes.
765 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
766 * Implemented decoding of TLS syscalls on m68k.
767 * Implemented biarch support on powerpc64.
768 * Implemented biarch support for getrlimit() and setrlimit().
769 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
770 * Implemented SOL_SCTP socket options decoding.
771 * Added HDIO_* ioctl names.
772 (Addresses Debian bug #450953).
773 * Added LOOP_* ioctl names.
774 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
775 to match Linux 2.6.37.
776 * Updated the list of IPPROTO_* constants to match netinet/in.h.
777 * Implemented decoding of HDIO_* and BLK* ioctls.
778 * Added MicroBlaze architecture support.
779 * Added new syscall entries to match Linux 2.6.37.
780 * Regenerated list of ioctl names from Linux 2.6.37.
781 * Enhanced signal notification decoding.
782 * Documented -C and -D options.
785 * Fixed fetching syscall arguments on m68k.
786 * Fixed an error when judging whether a process has children.
787 * Fixed get/set_robust_list syscall numbers for powerpc.
788 * Fixed a corner case in printing clone flags.
789 * Fixed cross-compiling issues.
790 * Fixed build issues on powerpc64, SH and SPARC.
791 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
792 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
793 fanotify_init, and fanotify_mark syscalls.
794 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
795 * Fixed biarch support in IO dumping.
796 * Fixed raw exit_group decoding.
797 * Fixed decoding of file descriptors on 64-bit architectures.
798 * Fixed a corner case in waitpid handling.
799 (Addresses Red Hat bug #663547).
800 * Fixed stat64 decoding on mips
801 (Addresses Debian bug #599028).
802 * Fixed misleading italics in the manual page.
803 (Addresses Debian bug #589323).
805 Noteworthy changes in release 4.5.20 (2010-04-13)
806 =================================================
809 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
810 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
811 rt_tgsigqueueinfo, perf_event_open.
812 * Enhanced decoding of recently added syscalls on non-x86 architectures
813 by replacing a bare decoder with elaborate parsers enabled earlier
815 * Implemented -C option to combine regular and -c output.
816 (Addresses Debian bug #466196)
817 * Enhanced decoding of mbind and mremap syscalls.
818 * Enhanced SOL_PACKET socket options decoding.
819 * Regenerated list of ioctl names from linux 2.6.33.
820 * Added TILE architecture support.
823 * Fixed build with Linux kernel headers 2.6.32-rc5+.
824 (Addresses Debian bug #560516 and Fedora bug #539044)
825 * Fixed build on mips.
826 * Fixed handling of Linux systems without struct statfs64.
827 * Fixed reporting signal mask by sigreturn on powerpc.
828 * Fixed potential stack buffer overflow in select decoder.
829 (Addresses Fedora bug #556678)
830 * Corrected msgsnd indirect ipccall decoding.
831 * Corrected decoding of 64bit syscalls.
832 (Addresses Debian bug #570603)
833 * Corrected getsockopt decoding on architectures where
834 sizeof(long) > sizeof(int).
835 (Addresses Debian bug #494844)
836 * Corrected decoding of epoll_pwait.
837 (Addresses Debian bug #513014)
838 * Corrected handling of killed threads.
840 Noteworthy changes in release 4.5.19 (2009-10-21)
841 =================================================
843 * Changes in behavior
844 * When command exits, strace now exits with the same exit status.
845 If command is terminated by a signal, strace terminates itself
846 with the same signal, so that strace can be used as a wrapper
847 process transparent to the invoking parent process.
848 When using -p option, the exit status of strace is zero unless
849 there was an unexpected error in doing the tracing.
850 (Addresses Fedora bug #105371 and Debian bug #37665)
853 * Implemented decoding of new Linux syscalls: accept4, dup3,
854 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
855 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
856 * Implemented decoding of accept4 socketcall.
857 * Enhanced prctl decoding.
858 * Enhanced nanosleep decoding.
859 * Enhanced ptrace decoding.
860 * Enhanced futex decoding.
861 * Enhanced CAP_* decoding.
862 * Enhanced SIOCS* ioctls decoding.
863 * Enhanced fcntl F_* flags decoding.
864 * Enhanced semop/semtimedop decoding.
865 * Updated ARM architecture support.
866 * Added Blackfin architecture support.
867 * Added AVR32 architecture support.
868 * Added CRIS architecture support.
869 * Made strace detect when traced process suddenly disappeared.
872 * Fixed syscall numbers for tee and sync_file_range.
873 (Addresses Debian bug #503124)
874 * Fixed several bugs in strings decoder, including potential heap
876 (Addresses Fedora bugs #470529, #478324 and #511035)
877 * Marked sendfile(2) as a network syscall.
878 (Addresses Debian bug #509499)
879 * Fixed accept(2) decoding.
880 (Addresses Debian bug #507573)
881 * Fixed sigtimedwait(2) decoding.
882 * Fixed build on ARM EABI.
883 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
884 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
885 (Addresses Red Hat bug #471169)
886 * Fixed display of 32-bit argv array on 64-bit architectures.
887 (Addresses Fedora bug #519480)
888 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
889 * Fixed HPPA architecture support.
890 (Addresses Debian bugs #437928 and #546619)
895 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
896 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
901 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
902 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
903 * Improved output for prctl system call on Linux.
904 * Improved support for Linux/ARM.
905 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
910 * Improved output for delete_module, futex, and mbind system calls on Linux.
911 * Improved output for SG_IO ioctls on Linux.
912 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
913 eventfd, getcpu, epoll_pwait.
918 * Several biarch improvements.
919 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
920 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
925 * Accept numeric system calls in -e.
930 * Introduce "-e trace=desc".
935 * Better x86-64 support for IA32 processes.
936 * Update PowerPC system calls.
937 * Better printing for Linux aio system calls.
941 * Quick fix release for build issues.
942 * One fix for Linux/ARM system call table.
947 * Print fault address for SIGSEGV/SIGBUS signals when available.
952 * Improve socket ioctl printing.
953 * Update Linux/IA64 syscall list.
954 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
955 * Improve mount flags printing.
956 * Support symbolic printing of x86_64 arch_prctl parameters.
961 * Update syscall tables for Alpha, ARM, HPPA.
962 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
963 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
964 * Improve ioctl command name matching.
965 * Print RTC_* ioctl structure contents.
966 * Support newer RLIMIT_* values.
967 * Print struct cmsghdr details in sendmsg.
972 * Print attribute values in *xattr system calls on Linux.
973 * Include pread and pwrite calls in -e read and -e write tracing.
974 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
975 * Print clock_t values symbolically in Linux clock_* system calls.
979 * Bug fixes, Linux ioctl updates.
980 * David Miller contributed support for Linux/SPARC64.
988 * Update Linux ioctl lists.
989 * Update PF_* and AF_* value lists.
990 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
995 * On Linux using NPTL threads, -p will now attach to all threads in a process.
996 * Handle new mq_* system calls in Linux 2.6.6 and later.
1001 * Report some new VM_* bit values on Linux.
1002 * Better output for Linux sched_* system calls.
1007 * Display multiple ioctl name matches on Linux.
1011 * New port to AMD's x86-64 architecture. One strace binary can
1012 handle both new x86-64 and old i386 processes.
1013 * Fixed support for LFS64 calls.
1014 * New switch -E to add/remove environment variables for the command.
1015 * Merged s390/s390x port.
1016 * Trace an unbounded number of processes.
1017 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1018 * Fixed bugs with attach/detach leaving things stopped.
1019 * Fixed traced process seeing ECHILD despite live, traced children
1020 in waitpid calls with WNOHANG.
1021 * Stuart Menefy contributed a port to Linux/SH.
1022 * Stephen Thomas contributed a port to Linux/SH64.
1023 * Many other bug fixes.
1027 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1028 * Fix the ioctl setup for Linux, turned out it did not really work.
1029 Improve the ioctl extractor as well so we decode some more ones.
1033 * compile fixes for Linux/mips
1037 * Linux ia64 and hppa ports added
1038 * The usual Linux syscall updates (includes 32bit uid/gid support),
1039 * Linux ioctl list updated
1040 * Support IPv6 scope ids
1041 * FreeBSD/i386 port added
1042 * UnixWare and Solaris updates
1043 * Better support for tracing multithreaded processes in Linux
1047 * Compiles on glibc2.0 systems again
1048 * Linux/S390 port added
1049 * The usual Linux syscall updates
1050 * we can follow fork on arm now
1054 * Linux/MIPS port added
1055 * Lots of Linux updates again
1056 * Improved IPv6 support
1062 * Compiles on glibc2.0 systems again
1066 * Get stat structure properly on Linux 64bit archs
1067 * Personalities work again
1068 * Compile correctly on SunOS again
1074 * Linux (ultra)sparc fixes
1081 * add support for more Linux architectures (powerpc, sparc, arm)
1082 * support lots more Linux syscalls
1083 * fix signal handling
1084 * add IPX and IPIP support
1085 * check stray syscall after execv
1086 * fix hanging children
1088 Changes in version 3.1
1089 ======================
1091 * Irix5 is supported
1092 * Linux 68k is supported
1093 * Linux alpha is supported
1094 * configure is upgraded to autoconf 2.x
1095 * using -f in combination with -e now works correctly
1096 * output can be piped to a program
1097 * tracing setuid programs works better
1098 * it is now reasonable to install strace setuid to root in some circumstances
1099 * new useful tracing names like file and process to trace whole
1100 classes of system calls, e.g. -efile traces all system calls that
1101 take a file name as an argument
1102 * IPC calls on SunOS 4.1.x are decoded
1103 * Linux program memory is reliably dereferenced
1104 * Linux decodes at least the name of all syscalls as of pre2.0.4
1105 * various cosmetic changes and bug fixes
1107 Changes from versions 2.x to version 3.0
1108 ========================================
1110 * filename arguments are neither abbreviated nor stringified
1111 * string arguments are now true C strings using octal instead of hex by default
1112 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1113 * by default the output for multiple processes now goes into one file
1114 * all structures, vectors, bitsets, etc. use consistent output formats
1115 * the -c option now means count calls, -i does what the old -c used to do
1117 New Features in version 3.0
1118 ===========================
1120 * non-ascii strings can be optionally printed entirely in hex
1121 * the output format is readable when multiple processes are generating output
1122 * exit values are printed in an alignment column
1123 * is is possible to suppress messages about attaching and detaching
1124 * various tracing features can be enabled on a per syscall/signal/desc basis
1125 * selective tracing of syscalls
1126 * selective printing of syscall structures
1127 * selective abbreviation of long structures on a per syscall basis
1128 * selective printing of raw syscall arguments and results
1129 * selective tracing of signals
1130 * selective dumping of all I/O read from file descriptors
1131 * selective dumping of all I/O written to file descriptors
1132 * optional counting of time, calls, and errors for each syscall
projects / strace / blob