1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Implemented libdw backend for -k option, configured at build time
6 using --with-libdw option.
7 Whether -k option is compiled is now configured at build time
8 using --enable-stacktrace option.
9 * Added -X option for configuring xlat output formatting (addresses
12 Noteworthy changes in release 4.22 (2018-04-05)
13 ===============================================
15 * Changes in infrastructure
16 * The mailing list was moved to strace-devel@lists.strace.io.
17 * SourceForge git repository
18 (https://sourceforge.net/p/strace/code/ci/master/tree/) is no longer
19 maintained. Please use GitLab (https://gitlab.com/strace/strace/)
20 or GitHub (https://github.com/strace/strace/) repository instead.
22 * Changes in behaviour
23 * When printing string data, '8' and '9' following an octal escape sequence
24 no longer lead to unabbreviated octal escape sequence output, as they used
26 * Angle brackets are now printed as octal number escape sequences
27 in the output of paths associated with file descriptors.
28 * Data dump for write syscalls (-e write) is performed regardless
29 of successfulness of these syscall (addresses Debian bug #436284).
30 * -r and -t options are now affect output independently. Previously,
31 -r option led to ignoring of the -t option (addresses Debian bug #466195).
34 * Implemented delay injection (-e inject=SET:delay_enter= and
35 -e inject=SET:delay_exit= options).
36 * Added -A option for opening output files in append mode
37 (addresses Debian bug #528488).
38 * IPv6 addresses shown in socket information in -yy mode are now printed
40 * Enhanced decoding of bpf, prctl and ptrace syscalls.
41 * Enhanced decoding of BTRFS_IOC_INO_PATHS, BTRFS_IOC_LOGICAL_INO, and PTP_*
43 * Enhanced NETLINK_ROUTE protocol decoding.
44 * Updated lists of signal codes.
45 * Updated lists of BPF_*, BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
46 SCHED_FLAG_*, SCTP_* and error constants.
47 * Implemented block/character device number printing in -yy mode.
48 * Known pixel/SDR format names are printed as comments for pixelformat fields
50 * Enhanced decoding of kern_features syscall.
51 * Enhanced NETLINK_NETFILTER netlink protocol decoder.
52 * Optimized handling of large number of tracees.
53 * Improved wall clock time measurement in syscall count statistics
55 * Extended the range of allowed values in -e inject=...:retval= expression.
57 * Updated lists of ioctl commands from Linux 4.16.
58 * Enhanced manual page.
61 * Fixed build on m68k.
62 * Fixed v4l2 pixelformat decoding on big-endian architectures.
65 Noteworthy changes in release 4.21 (2018-02-13)
66 ===============================================
68 * Changes in behaviour
69 * Warning is now issued when -F option is used.
70 * Warning is now issued when a tracee with unsupported personality
72 * Unknown syscall numbers are now printed in hexadecimal form.
75 * Implemented decoding of netlink descriptor attributes as file descriptors.
76 * Implemented decoding of hugetlb page size selection flags.
77 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
78 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
79 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
80 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
81 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
82 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
84 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
85 * Implemented decoding of riscv_flush_icache syscall.
86 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
88 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
89 * Print values returned by mq_open syscall and first arguments
90 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
92 * Added decoding of get_tls syscall on arm.
93 * Added -e trace=%pure option for tracing system calls with no arguments that
95 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
96 SHM_*, and TCP_* constants.
97 * Added manual page for the strace-log-merge command.
98 * Updated lists of ioctl commands from Linux 4.15.
99 * Implemented biarch support for s390x.
100 * Implemented an optional support for symbol demangling in strace -k output
101 (activated by --with-libiberty configure option).
102 * Information about availability of demangling and reliable personality
103 decoding (on architectures with multiple personalities) is now available
105 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
106 powerpc and powerpc64.
107 * Enhanced manual page.
110 * Fixed multi-personality support in cross builds.
111 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
112 syscalls to %desc tracing set.
113 * Fixed path tracing support for mmap syscalls with indirect arguments and
114 for old select syscall.
115 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
116 * Fixed open mode flags decoding.
117 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
118 * Error counts that exceed one billion are now printed correctly in call
120 * Fixed call summary header for x32 personality.
121 * Changes of tracee personalities are reported more reliably.
122 * Fixed the case when strace attaches to a tracee being inside exec and its
123 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
124 which messed up all the syscall state tracking.
125 * Fixed printing of higher 32 bits of the return value for x32 personality.
128 * A C compiler that supports "for" loop initial declarations is now required.
129 * Inability to configure multiple personality support on architectures where
130 multiple personalities are supported leads to configuration failure during
131 build now. Use --enable-mpers=check to revert to the old behaviour.
132 * Build-time requirement for the mpers support has been lowered from gawk 4
134 * Removed incomplete and non-functional support for the CRIS architecture.
135 * Removed incomplete and unused support for IA-32 mode on the IA-64
138 Noteworthy changes in release 4.20 (2017-11-13)
139 ===============================================
142 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
143 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
145 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
146 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
148 * Added decoding of statx syscall on hppa.
149 * Updated lists of ioctl commands from Linux 4.14.
152 * Fixed powerpc personality support on powerpc64.
154 Noteworthy changes in release 4.19 (2017-09-05)
155 ===============================================
157 * Changes in behaviour
158 * Changed formatting of personality names on tile architecture in order
159 to make it in line with other multi-personality architectures.
160 * Changed field output order in struct v4l2_requestbuffers to improve in/out
162 * Changed handling of multiple signal= specifications in an injection
163 expression: multiple specification now leads to error instead of implicit
164 usage the last specification.
167 * Enhanced decoding of optlen argument of getsockopt syscall.
168 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
169 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
170 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
171 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
172 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
173 of setsockopt syscall.
174 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
175 (KDF parameters decoding).
176 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
177 * Enhanced decoding of UFFDIO_API ioctl command.
178 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
179 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
180 * Implemented decoding of linux socket filter programs specified
181 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
182 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
183 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
184 * Implemented NETLINK_SELINUX protocol specific decoding.
185 * Implemented decoding of netlink message ack flags.
186 * Implemented decoding of nlmsgerr netlink attributes.
187 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
188 * Implemented decoding of crypto_user_alg netlink attributes
190 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
191 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
193 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
194 * Improved handling of unexpected tracees (the ones that cloned with
195 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
196 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
197 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
198 * Added decoding of arch_prctl syscall on x86.
199 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
200 copy_file_range, preadv2, pwritev2, and statx on alpha.
201 * Added decoding of statx syscall on microblaze.
202 * Added decoding of s390_guarded_storage syscall on s390.
203 * Updated lists of ioctl commands from Linux 4.13.
204 * Enhanced manual page.
207 * Fixed printing of group_req structure on non-native personalities.
208 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
210 * Fixed formatting of nul-terminated strings which have kernel-imposed size
212 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
214 * Fixed build warnings on Android mips64.
215 * Fixed unused function "is_negated_errno" build warning when built
217 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
218 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
219 to use if Linux kernel has commit v4.10-rc1~114^2~2.
220 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
221 and inotify_init syscalls.
222 * Fixed personality switch printing on sparc64 and risc-v.
224 Noteworthy changes in release 4.18 (2017-07-05)
225 ===============================================
228 * Implemented decoding of SCM_TIMESTAMP* control messages.
229 * Implemented decoding of netlink NLMSG_DONE messages.
230 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
231 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
232 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
233 * Implemented decoding of NETLINK_GENERIC protocol families.
234 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
235 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
236 * Implemented basic decoding of netlink attributes.
237 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
238 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
239 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
240 netlink attributes of NETLINK_SOCK_DIAG.
241 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
242 SO_*, V4L2_*, and prctl ARCH_* constants.
243 * Updated lists of ioctl commands from Linux 4.12.
246 * In interactive mode (-I2), those signals that were blocked at startup
247 will remain blocked for the whole period of strace execution.
248 * strace no longer resets SIGCHLD handler in tracees to the default action.
249 * When traced command is terminated by a blocked signal, strace unblocks
250 that signal to ensure its own termination with the same signal.
251 * Fixed corner cases in decoding of old sigaction syscall.
252 * Fixed build with old kernel headers on mips.
253 * Fixed build on aarch64 and tile with glibc >= 2.26.
254 * Fixed build on arc and nios2.
256 Noteworthy changes in release 4.17 (2017-05-24)
257 ===============================================
259 * Changes in command line syntax
260 * Syscall classes specified in -e trace= option now have % prefix (like
261 -e trace=%process). Old style class names without leading % are still
262 supported, but considered deprecated now.
265 * Optimized syscall filtering.
266 * Improved representation of timestamps.
267 * Enhanced decoding of sched_setattr syscall.
268 * Added -e trace=%stat option for tracing variants of stat syscall.
269 * Added -e trace=%lstat option for tracing variants of lstat syscall.
270 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
272 * Added -e trace=%%stat option for tracing syscalls used for querying file
273 status information (stat, lstat, fstat, fstatat, statx, and their
275 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
277 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
279 * Added -e trace=%%statfs option for tracing syscalls used for querying file
280 system statistics information (statfs-like, fstatfs-like and ustat).
281 * Added -e trace=/regex option for filtering syscalls using regular
283 * Added support for prepending of question mark before syscall qualification
284 in -e trace expressions in order to suppress error in case no syscalls
285 matched the provided qualification.
286 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
287 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
288 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
290 * Implemented decoding of statx syscall.
291 * Implemented decoding of NS_* ioctl commands.
292 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
293 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
294 * Implemented decoding of NLMSG_ERROR netlink messages.
295 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
296 * Improved decoding of misplaced parts in DM_* ioctl commands.
297 * Updated lists of ioctl commands from Linux 4.11.
300 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
301 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
302 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
303 powerpc64, sh, sh64, sparc, and sparc64.
304 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
305 * Fixed decoding of netlink messages received within struct msghdr.
306 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
307 argument of sched_getattr syscall being not quite 32-bit.
308 * Fixed corner cases of printing inaccessible times argument of utimes
309 and futimesat syscalls.
311 Noteworthy changes in release 4.16 (2017-02-14)
312 ===============================================
315 * Implemented syscall return value injection (-e inject=SET:retval= option).
316 * Implemented signal injection (-e inject=SET:signal= option).
317 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
318 * Implemented decoding of all SG_* ioctl commands.
319 * Implemented decoding of ustat syscall.
320 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
321 and BPF_PROG_DETACH commands of bpf syscall.
322 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
323 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
325 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
326 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
327 * Updated lists of ioctl commands from Linux 4.10.
328 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
332 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
333 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
334 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
335 and pwritev* syscalls on x32.
336 * Fixed printing of string arguments of getxattr and setxattr syscalls
337 when -s option is used to limit the printed string size.
338 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
340 * Fixed decoding of SG_* and LOOP_* ioctl commands.
341 * Fixed build on mips with musl libc.
342 * Fixed cross-building of ioctlsort.
343 * Applied minor formatting fixes to the manual page.
345 Noteworthy changes in release 4.15 (2016-12-14)
346 ===============================================
348 * Changes in behavior
349 * Time stamps are now printed according to ISO 8601.
350 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
351 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
352 syscalls is now formatted as an array.
355 * Implemented syscall fault injection (-e fault=... option).
356 * Implemented decoding of DM_* ioctl commands.
357 * Implemented decoding of attr parameter of perf_event_open syscall.
358 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
359 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
360 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
362 * Implemented PTRACE_GETREGS API support on m68k.
363 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
364 and V4L2_* constants.
365 * Updated lists of ioctl commands from Linux 4.9.
366 * Added decoding of recently added syscalls on arc, x32, and xtensa.
367 * Enhanced manual page.
370 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
371 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
372 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
373 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
374 setgroups, setns, unshare, and utimes syscalls.
375 * Fixed handling of verbose flag in printing of controls array
376 of struct v4l2_ext_controls.
377 * Fixed omission of field names in the output of capability, sigaction,
378 sigevent, statfs, timespec, timeval, and utimbuf structures.
379 * Fixed printing of unknown syscalls in siginfo structure.
380 * Fixed decoding of ioctl constants on m68k.
381 * Fixed cris architecture support.
382 * Fixed cross build when host compiler does not support the same
383 set of warning flags as the cross compiler.
384 * Fixed build on SLE10 and SLE11.
386 Noteworthy changes in release 4.14 (2016-10-04)
387 ===============================================
389 * Changes in behavior
390 * When using -p option without a command and no processes has been attached,
391 strace exits with exit status 1.
394 * Added printing of the mode argument of open and openat syscalls
395 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
396 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
397 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
398 and aio family syscalls.
399 * Implemented fetching of the 7th subcall argument on mips o32.
400 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
402 * Updated lists of ioctl commands from Linux 4.8.
403 * Added decoding of new syscalls on sh and sh64.
404 * Added RISC-V architecture support.
407 * Marked io_setup and io_destroy as memory mapping related syscalls.
408 * Fixed leakage of placeholder descriptors to tracees.
409 * Fixed printing of mode_t, umode_t, and umask types.
410 * Fixed decoding of iovec arrays without a limit on total data size.
411 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
412 and ipc family syscalls.
413 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
414 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
416 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
417 * Fixed decoding of struct stat64 on sparc64.
418 * Fixed decoding of uid and gid-related syscalls on sparc64.
419 * Fixed decoding of the forth argument of semctl syscall on sparc64.
420 * Fixed values of tty ioctl constants on sparc64.
421 * Fixed sparc personality support on sparc64.
423 Noteworthy changes in release 4.13 (2016-07-26)
424 ===============================================
427 * Implemented a general netlink socket parser.
428 * Enhanced decoding of socket addresses.
429 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
430 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
431 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
432 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
433 and *_MAGIC constants.
434 * Updated lists of ioctl commands from Linux 4.7.
437 * Fixed decoding of pid_t argument of prlimit64 syscall.
438 * Fixed sign extension issues in the parser of struct rusage.
439 * Fixed race condition in decoding of timeout argument of recvmmsg and
440 rt_sigtimedwait syscalls.
441 * Fixed build with fresh linux kernel headers.
443 Noteworthy changes in release 4.12 (2016-05-31)
444 ===============================================
447 * Implemented simultaneous use of -p option and tracing of a command.
448 (addresses Debian bug #549942).
449 * Implemented caching of netlink conversations to reduce amount of time
450 spent in decoding socket details in -yy mode.
451 * Implemented -yy mode decoding of protocol:portid pairs associated with
452 netlink socket descriptors.
453 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
454 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
456 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
457 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
458 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
459 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
460 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
461 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
462 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
463 statfs64, tgkill, waitid, and xattr family syscalls.
464 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
465 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
466 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
467 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
468 * Added decoding of fadvise64 and fadvise64_64 on s390.
469 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
470 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
471 * Updated lists of ioctl commands from Linux 4.6.
474 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
475 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
476 * Fixed decoding of mlock2 syscall on sparc.
477 * Fixed decoding of osf_shmat syscall on alpha.
478 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
479 (addresses Debian bug #485979 and Fedora bug #1298294).
480 * Fixed decoding of preadv syscall in case of short read.
481 * Fixed decoding and dumping of readv syscall in case of short read.
482 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
483 * Fixed decoding of mincore syscall's last argument.
484 * Fixed remaining errors in mapping between syscall numbers and numbers
485 of syscall arguments.
486 * Applied various fixes to strace-graph script.
488 Noteworthy changes in release 4.11 (2015-12-21)
489 ===============================================
491 * Changes in behavior
492 * Some syscalls have different names depending on architecture and
493 personality. In these cases, syscall filtering and printing now
494 consistently uses the names that match corresponding __NR_* kernel
495 macros of the tracee's architecture and personality.
496 * Added strace prefix to all diagnostic messages.
499 * Enhanced and extended test suite.
500 * Implemented reliable tracing of processes whose personality differs
501 from the personality of strace, fixed decoding of 32-bit personality
502 syscalls on 64-bit architectures.
503 * When some data referenced by syscall arguments is irrelevant or cannot
504 be read from tracee's memory, strace now prints its address consistently.
505 * When a syscall is restarted using restart_syscall mechanism, strace now
506 shows the syscall name on architectures that expose this information.
507 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
508 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
509 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
510 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
511 * Optimized decoding of indirect socket syscalls.
512 * Implemented decoding of nanoseconds along with seconds in stat family
513 syscalls (addresses Fedora bug #1251176).
514 * Implemented decoding of struct statfs.f_flags in statfs syscall.
515 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
517 * Implemented decoding of indirect syscall on mips o32.
518 * Implemented decoding of IPPROTO_IP control messages.
519 * Implemented decoding of setsockopt syscall multicast arguments.
520 * Enhanced decoding of struct sigevent.
521 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
522 and v4l2 ioctl syscall arguments.
523 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
524 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
525 sendfile, setsockopt, and shmctl syscalls.
526 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
527 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
528 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
529 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
530 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
531 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
533 * Added Nios II architecture support.
534 * Added new syscall entries to match Linux 4.4.
537 * Fixed potential short read of strings from tracee's memory.
538 * Fixed -qq option in conjunction with -o option.
539 * Fixed filtering of <unavailable> syscalls.
540 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
541 with 64-bit aligned structures.
542 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
543 syscall flags arguments.
544 * Fixed decoding of 4th argument of clock_nanosleep syscall.
545 * Fixed decoding of getpagesize syscall on m68k.
546 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
547 * Fixed decoding of timezone argument of gettimeofday and settimeofday
549 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
551 * Fixed decoding of pipe syscall on alpha and mips.
552 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
553 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
554 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
556 * Fixed decoding of 4th argument of semctl indirect syscall.
557 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
558 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
559 * Fixed decoding of struct dirent on x32.
560 * Fixed decoding of times syscall return value on mips n32 and x32.
561 * Fixed decoding of path argument of umount2 syscall
562 (addresses Debian bug #785050).
563 * Worked around a kernel bug in tracing privileged executables.
564 * Fixed various errors in mapping between syscall numbers and associated
565 information like the number of syscall arguments, the name of syscall,
568 Noteworthy changes in release 4.10 (2015-03-06)
569 ===============================================
572 * Added -yy option to print protocol and address information associated with
574 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
575 recvmsg, sendmmsg, and recvmmsg syscalls.
576 * Implemented full 32-bit decoding of ioctl commands
577 (addresses Debian bug #692913 and Fedora bug #902788).
578 * Implemented PTRACE_GETREGS API support on ia64.
579 * Implemented PTRACE_GETREGS API support on mips.
580 * Implemented PTRACE_GETREGSET API support on s390/s390x.
581 * Implemented decoding of getrandom and seccomp syscalls.
582 * Implemented full decoding of 64-bit capability sets.
583 * Implemented decoding of all prctl commands.
584 * Implemented decoding of parametrized ioctl commands.
585 * Implemented decoding of evdev ioctl commands.
586 * Implemented decoding of v4l ioctl commands.
587 * Implemented decoding of SG_IO v4 ioctl commands.
588 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
589 * Implemented decoding of FALLOC_FL_* fallocate flags.
590 * Implemented decoding of rt_sigreturn signal mask on aarch64,
592 * Enhanced socket decoder to support bluetooth sockets.
593 * Enhanced decoding of unlisted ioctl commands.
594 * Enhanced decoding of getsockopt and setsockopt syscall.
595 * Enhanced decoding of sysinfo syscall.
596 * Enhanced decoding of struct cmsghdr.
597 * Enhanced decoding of wait status.
598 * Enhanced aio support on non-x86 architectures by using external libaio.h.
599 * Added O_TMPFILE to the list of recognized open mode flags.
600 * Updated the list of filesystem type constants that is used in decoding
601 statfs family syscalls.
602 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
604 * Updated lists of signal constants from Linux 3.19.
605 * Updated lists of errno constants from Linux 3.19.
606 * Updated lists of ioctl commands from Linux 3.9.
607 * Added new syscall entries to match Linux 3.19.
610 * Fixed various errors in mapping between syscall numbers and associated
611 information like the number of syscall arguments, the name of syscall,
613 * Fixed quoting issues in printing descriptors, filenames, network interface
614 names, struct utsname members, device/volume names of BLK* ioctl commands.
615 * Fixed uid_t/git_t decoding.
616 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
617 * Fixed potential open flags truncation on some architectures.
618 * Fixed decoding of struct ifreq.ifr_name.
619 * Fixed decoding of SIOCSIFNAME ioctl command.
620 * Fixed decoding of RENAME_* renameat2 flags.
621 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
622 * Fixed decoding of indirect ipc subcalls on some architectures.
623 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
624 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
625 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
626 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
627 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
628 sparc, sparc64, mips, and s390.
629 * Fixed instruction pointer output (-i option) on architectures that support
630 several personalities.
631 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
633 * Fixed build on systems where struct sigaction has no sa_restorer member.
634 * Fixed build with uclibc and musl libc.
637 * Linux kernel >= 2.5.46 is required.
638 Older versions without a decent PTRACE_SETOPTIONS support will not work.
639 * On mips, linux kernel >= 2.6.15 is required.
640 Older versions without a decent PTRACE_GETREGS support will not work.
641 * On s390 and s390x, linux kernel >= 2.6.27 is required.
642 Older versions without a decent PTRACE_GETREGSET support will not work.
644 Noteworthy changes in release 4.9 (2014-08-15)
645 ==============================================
647 * Changes in behavior
648 * Disabled OABI support on ARM EABI systems by default,
649 added --enable-arm-oabi option to enable it at configure time.
652 * Added experimental -k option to print stack trace after each traced syscall.
653 * Added -w option to produce stats on syscall latency.
654 (addresses Debian bug #457497).
655 * Added ARC architecture support.
656 * Added PTRACE_GETREGS API support on PowerPC.
657 * Enhanced Bionic libc and musl libc support.
658 * Enhanced tracing of x86 personality processes on x86_64 and x32.
659 * Enhanced tracing of ARM personality processes on AArch64.
660 * Enhanced 32/64bit personality detection on PowerPC.
661 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
662 renameat2, and request_key syscalls.
663 * Robustified decoding of select, pselect, and io_submit syscalls.
664 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
665 setdomainname, sethostname, setns, and sync_file_range syscalls.
666 * Enhanced decoding of signal bitmasks.
667 * Enhanced decoding of file descriptors.
668 * Enhanced siginfo_t decoding.
669 * Enhanced PF_NETLINK decoding.
670 * Updated CLOCK_* constants
671 (addresses Fedora bug #1088455).
672 * Added new syscall entries to match Linux 3.16.
675 * Added shmat and shmdt to the set of memory mapping related syscalls.
676 * Fixed detaching from stopped processes.
677 * Fixed fanotify_mark decoding on 32bit architectures.
678 * Fixed offset decoding in preadv and pwritev syscalls.
679 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
680 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
681 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
682 (addresses Fedora bug #993384).
683 * Miscellaneous corrections in the manual page.
684 (Addresses Debian bug #725987).
686 Noteworthy changes in release 4.8 (2013-06-03)
687 ==============================================
689 * Changes in behavior
690 * In case of normal strace termination, when the trace output is
691 redirected to a pipe, strace now closes it and waits for the pipe
692 process termination before exit.
695 * Implemented tracing using PTRACE_SEIZE API (when available).
696 * Implemented more reliable PTRACE_GETREGSET-based process personality
697 detection on x86-64 and x32 (when available).
698 * Added -e trace=memory option for tracing memory mapping related syscalls.
699 * Documented -b option.
700 * Allowed exit status messages to be suppressed by giving -q option twice.
701 * Added AArch64 architecture support
702 (addresses Debian bug #693074 and Fedora bug #969858).
703 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
704 * Added tilegx personality support for Tile.
705 * Enhanced support of NOMMU architectures.
706 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
708 * Added new syscall entries to match Linux 3.9.
709 * Regenerated the list of common ioctl names from Linux 3.9.
710 * Updated the list of errno constants.
711 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
712 PTRACE_O_*, and TCP_* constants.
713 * Implemented decoding of UBI ioctls.
714 * Removed redundant "*32" ioctl names.
717 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
718 (addresses Fedora bug #659382).
719 * Fixed kernel release string parsing
720 (addresses Debian bug #702309).
721 * Fixed decoding of *xattr syscalls
722 (addresses Fedora bug #885233).
723 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
724 (addresses Fedora bug #912790).
725 * Fixed tracing forks on SPARC.
726 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
727 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
728 and truncate64 syscalls.
729 * Fixed categories of multiple syscalls on most of supported architectures.
730 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
731 * Fixed decoding of multiple 32-bit personality syscalls on x32.
732 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
733 S390x, and Tile architectures.
734 * Fixed semtimedop decoding on S390x.
735 * Fixed sram_alloc decoding on Blackfin.
736 * Fixed build when process_vm_readv is a stab.
737 * Fixed build with older versions of libaio.h.
739 Noteworthy changes in release 4.7 (2012-05-02)
740 ==============================================
742 * Changes in behavior
743 * strace no longer suspends waitpid until there is a child
744 for waitpid'ing process to collect status from.
745 * strace no longer detaches from a tracee which is supposed
747 * strace now issues a new message: "+++ exited with EXITCODE +++"
748 which shows exact moment strace got exit notification,
749 analogous to existing "+++ killed by SIG +++" message.
752 * Added x32 personality support (x86_64 architecture).
753 * Added -y and -P options to print file descriptor paths and
754 filter by those paths.
755 * Added -I option to control strace interactivity.
756 * Allowed -p option to take comma or whitespace-separated list of PIDs.
757 * Added strace_log_merge script helper to merge timestamped "strace -ff"
759 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
760 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
761 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
762 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
763 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
764 listxattr, setrlimit and swapon syscalls.
765 * Implemented decoding of loop and mtd ioctls.
766 * Added syscall entries for new linux syscalls.
767 * Added syscall entries for direct socket system calls on powerpc.
768 * Updated the list of errno constants.
769 * Updated lists of MSG_*, STA_*, and TCP_* constants.
770 * Regenerated the list of ioctl names from Linux 3.3.
771 * Enhanced switching between processes with different personalities.
772 * Enhanced signals reporting by using short signal names.
773 * Made ERESTART* messages more descriptive.
774 * Made parsing of numbers from strings more robust.
775 * Added support for compat_statfs64 and statfs64.f_flags.
776 * Changed read of data blocks to use single process_vm_readv syscall
777 (when available) instead of several PTRACE_PEEKDATA operations.
778 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
779 operation instead of several PTRACE_PEEKUSER operations.
780 * Applied various optimizations to make strace work faster.
783 * Implemented proper handling of real SIGTRAPs on kernels supporting
784 PTRACE_O_TRACESYSGOOD.
785 (Addresses Fedora bug #162774).
786 * Fixed sockaddr_un.sun_path name in decoded output.
787 (Addresses Debian bug #554946).
788 * Fixed to avoid potential core file clobbering on exit.
789 (Addresses Debian bug #656398).
790 * Fixed a typo in documentation.
791 (Addresses Debian bug #653309).
792 * Fixed decoding of timer id returned by timer_create.
793 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
794 * Fixed *at syscalls flags decoding.
795 * Fixed ARM EABI 64-bit syscall's arguments decoding.
796 * Fixed semtimedop decoding on s390.
797 * Fixed osf_sigprocmask decoding on alpha.
798 * Fixed ipc and socket subcall decoding on several architectures.
799 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
800 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
801 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
802 * Corrected io_* syscall entries on ARM.
803 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
804 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
805 * Fixed build when libaio-devel is not available.
806 * Fixed configure checks for PTRACE_* constants.
807 * Fixed compilation warnings remained on several architectures.
810 * Removed all non-Linux code. After years of neglect, that dead code
811 just hampered further strace development.
812 * Linux kernel >= 2.6.18 is recommended. Older versions might still
813 work but they haven't been thoroughly tested with this release.
815 Noteworthy changes in release 4.6 (2011-03-15)
816 ==============================================
818 * Changes in behavior
819 * Print diagnostic information about changes in personality mode to
820 standard error instead of standard output.
823 * Implemented a new method of following clone, fork, and vfork
824 syscalls using the Linux kernel's explicit facilities for tracing
825 creation of threads and child processes.
826 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
827 * Implemented decoding of TLS syscalls on m68k.
828 * Implemented biarch support on powerpc64.
829 * Implemented biarch support for getrlimit() and setrlimit().
830 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
831 * Implemented SOL_SCTP socket options decoding.
832 * Added HDIO_* ioctl names.
833 (Addresses Debian bug #450953).
834 * Added LOOP_* ioctl names.
835 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
836 to match Linux 2.6.37.
837 * Updated the list of IPPROTO_* constants to match netinet/in.h.
838 * Implemented decoding of HDIO_* and BLK* ioctls.
839 * Added MicroBlaze architecture support.
840 * Added new syscall entries to match Linux 2.6.37.
841 * Regenerated list of ioctl names from Linux 2.6.37.
842 * Enhanced signal notification decoding.
843 * Documented -C and -D options.
846 * Fixed fetching syscall arguments on m68k.
847 * Fixed an error when judging whether a process has children.
848 * Fixed get/set_robust_list syscall numbers for powerpc.
849 * Fixed a corner case in printing clone flags.
850 * Fixed cross-compiling issues.
851 * Fixed build issues on powerpc64, SH and SPARC.
852 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
853 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
854 fanotify_init, and fanotify_mark syscalls.
855 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
856 * Fixed biarch support in IO dumping.
857 * Fixed raw exit_group decoding.
858 * Fixed decoding of file descriptors on 64-bit architectures.
859 * Fixed a corner case in waitpid handling.
860 (Addresses Red Hat bug #663547).
861 * Fixed stat64 decoding on mips
862 (Addresses Debian bug #599028).
863 * Fixed misleading italics in the manual page.
864 (Addresses Debian bug #589323).
866 Noteworthy changes in release 4.5.20 (2010-04-13)
867 =================================================
870 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
871 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
872 rt_tgsigqueueinfo, perf_event_open.
873 * Enhanced decoding of recently added syscalls on non-x86 architectures
874 by replacing a bare decoder with elaborate parsers enabled earlier
876 * Implemented -C option to combine regular and -c output.
877 (Addresses Debian bug #466196)
878 * Enhanced decoding of mbind and mremap syscalls.
879 * Enhanced SOL_PACKET socket options decoding.
880 * Regenerated list of ioctl names from linux 2.6.33.
881 * Added TILE architecture support.
884 * Fixed build with Linux kernel headers 2.6.32-rc5+.
885 (Addresses Debian bug #560516 and Fedora bug #539044)
886 * Fixed build on mips.
887 * Fixed handling of Linux systems without struct statfs64.
888 * Fixed reporting signal mask by sigreturn on powerpc.
889 * Fixed potential stack buffer overflow in select decoder.
890 (Addresses Fedora bug #556678)
891 * Corrected msgsnd indirect ipccall decoding.
892 * Corrected decoding of 64bit syscalls.
893 (Addresses Debian bug #570603)
894 * Corrected getsockopt decoding on architectures where
895 sizeof(long) > sizeof(int).
896 (Addresses Debian bug #494844)
897 * Corrected decoding of epoll_pwait.
898 (Addresses Debian bug #513014)
899 * Corrected handling of killed threads.
901 Noteworthy changes in release 4.5.19 (2009-10-21)
902 =================================================
904 * Changes in behavior
905 * When command exits, strace now exits with the same exit status.
906 If command is terminated by a signal, strace terminates itself
907 with the same signal, so that strace can be used as a wrapper
908 process transparent to the invoking parent process.
909 When using -p option, the exit status of strace is zero unless
910 there was an unexpected error in doing the tracing.
911 (Addresses Fedora bug #105371 and Debian bug #37665)
914 * Implemented decoding of new Linux syscalls: accept4, dup3,
915 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
916 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
917 * Implemented decoding of accept4 socketcall.
918 * Enhanced prctl decoding.
919 * Enhanced nanosleep decoding.
920 * Enhanced ptrace decoding.
921 * Enhanced futex decoding.
922 * Enhanced CAP_* decoding.
923 * Enhanced SIOCS* ioctls decoding.
924 * Enhanced fcntl F_* flags decoding.
925 * Enhanced semop/semtimedop decoding.
926 * Updated ARM architecture support.
927 * Added Blackfin architecture support.
928 * Added AVR32 architecture support.
929 * Added CRIS architecture support.
930 * Made strace detect when traced process suddenly disappeared.
933 * Fixed syscall numbers for tee and sync_file_range.
934 (Addresses Debian bug #503124)
935 * Fixed several bugs in strings decoder, including potential heap
937 (Addresses Fedora bugs #470529, #478324 and #511035)
938 * Marked sendfile(2) as a network syscall.
939 (Addresses Debian bug #509499)
940 * Fixed accept(2) decoding.
941 (Addresses Debian bug #507573)
942 * Fixed sigtimedwait(2) decoding.
943 * Fixed build on ARM EABI.
944 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
945 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
946 (Addresses Red Hat bug #471169)
947 * Fixed display of 32-bit argv array on 64-bit architectures.
948 (Addresses Fedora bug #519480)
949 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
950 * Fixed HPPA architecture support.
951 (Addresses Debian bugs #437928 and #546619)
956 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
957 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
962 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
963 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
964 * Improved output for prctl system call on Linux.
965 * Improved support for Linux/ARM.
966 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
971 * Improved output for delete_module, futex, and mbind system calls on Linux.
972 * Improved output for SG_IO ioctls on Linux.
973 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
974 eventfd, getcpu, epoll_pwait.
979 * Several biarch improvements.
980 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
981 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
986 * Accept numeric system calls in -e.
991 * Introduce "-e trace=desc".
996 * Better x86-64 support for IA32 processes.
997 * Update PowerPC system calls.
998 * Better printing for Linux aio system calls.
1002 * Quick fix release for build issues.
1003 * One fix for Linux/ARM system call table.
1008 * Print fault address for SIGSEGV/SIGBUS signals when available.
1013 * Improve socket ioctl printing.
1014 * Update Linux/IA64 syscall list.
1015 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
1016 * Improve mount flags printing.
1017 * Support symbolic printing of x86_64 arch_prctl parameters.
1022 * Update syscall tables for Alpha, ARM, HPPA.
1023 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
1024 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
1025 * Improve ioctl command name matching.
1026 * Print RTC_* ioctl structure contents.
1027 * Support newer RLIMIT_* values.
1028 * Print struct cmsghdr details in sendmsg.
1033 * Print attribute values in *xattr system calls on Linux.
1034 * Include pread and pwrite calls in -e read and -e write tracing.
1035 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
1036 * Print clock_t values symbolically in Linux clock_* system calls.
1040 * Bug fixes, Linux ioctl updates.
1041 * David Miller contributed support for Linux/SPARC64.
1049 * Update Linux ioctl lists.
1050 * Update PF_* and AF_* value lists.
1051 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1056 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1057 * Handle new mq_* system calls in Linux 2.6.6 and later.
1062 * Report some new VM_* bit values on Linux.
1063 * Better output for Linux sched_* system calls.
1068 * Display multiple ioctl name matches on Linux.
1072 * New port to AMD's x86-64 architecture. One strace binary can
1073 handle both new x86-64 and old i386 processes.
1074 * Fixed support for LFS64 calls.
1075 * New switch -E to add/remove environment variables for the command.
1076 * Merged s390/s390x port.
1077 * Trace an unbounded number of processes.
1078 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1079 * Fixed bugs with attach/detach leaving things stopped.
1080 * Fixed traced process seeing ECHILD despite live, traced children
1081 in waitpid calls with WNOHANG.
1082 * Stuart Menefy contributed a port to Linux/SH.
1083 * Stephen Thomas contributed a port to Linux/SH64.
1084 * Many other bug fixes.
1088 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1089 * Fix the ioctl setup for Linux, turned out it did not really work.
1090 Improve the ioctl extractor as well so we decode some more ones.
1094 * compile fixes for Linux/mips
1098 * Linux ia64 and hppa ports added
1099 * The usual Linux syscall updates (includes 32bit uid/gid support),
1100 * Linux ioctl list updated
1101 * Support IPv6 scope ids
1102 * FreeBSD/i386 port added
1103 * UnixWare and Solaris updates
1104 * Better support for tracing multithreaded processes in Linux
1108 * Compiles on glibc2.0 systems again
1109 * Linux/S390 port added
1110 * The usual Linux syscall updates
1111 * we can follow fork on arm now
1115 * Linux/MIPS port added
1116 * Lots of Linux updates again
1117 * Improved IPv6 support
1123 * Compiles on glibc2.0 systems again
1127 * Get stat structure properly on Linux 64bit archs
1128 * Personalities work again
1129 * Compile correctly on SunOS again
1135 * Linux (ultra)sparc fixes
1142 * add support for more Linux architectures (powerpc, sparc, arm)
1143 * support lots more Linux syscalls
1144 * fix signal handling
1145 * add IPX and IPIP support
1146 * check stray syscall after execv
1147 * fix hanging children
1149 Changes in version 3.1
1150 ======================
1152 * Irix5 is supported
1153 * Linux 68k is supported
1154 * Linux alpha is supported
1155 * configure is upgraded to autoconf 2.x
1156 * using -f in combination with -e now works correctly
1157 * output can be piped to a program
1158 * tracing setuid programs works better
1159 * it is now reasonable to install strace setuid to root in some circumstances
1160 * new useful tracing names like file and process to trace whole
1161 classes of system calls, e.g. -efile traces all system calls that
1162 take a file name as an argument
1163 * IPC calls on SunOS 4.1.x are decoded
1164 * Linux program memory is reliably dereferenced
1165 * Linux decodes at least the name of all syscalls as of pre2.0.4
1166 * various cosmetic changes and bug fixes
1168 Changes from versions 2.x to version 3.0
1169 ========================================
1171 * filename arguments are neither abbreviated nor stringified
1172 * string arguments are now true C strings using octal instead of hex by default
1173 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1174 * by default the output for multiple processes now goes into one file
1175 * all structures, vectors, bitsets, etc. use consistent output formats
1176 * the -c option now means count calls, -i does what the old -c used to do
1178 New Features in version 3.0
1179 ===========================
1181 * non-ascii strings can be optionally printed entirely in hex
1182 * the output format is readable when multiple processes are generating output
1183 * exit values are printed in an alignment column
1184 * is is possible to suppress messages about attaching and detaching
1185 * various tracing features can be enabled on a per syscall/signal/desc basis
1186 * selective tracing of syscalls
1187 * selective printing of syscall structures
1188 * selective abbreviation of long structures on a per syscall basis
1189 * selective printing of raw syscall arguments and results
1190 * selective tracing of signals
1191 * selective dumping of all I/O read from file descriptors
1192 * selective dumping of all I/O written to file descriptors
1193 * optional counting of time, calls, and errors for each syscall
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