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
11 * Updated lists of ioctl commands from Linux 4.17.
13 Noteworthy changes in release 4.22 (2018-04-05)
14 ===============================================
16 * Changes in infrastructure
17 * The mailing list was moved to strace-devel@lists.strace.io.
18 * SourceForge git repository
19 (https://sourceforge.net/p/strace/code/ci/master/tree/) is no longer
20 maintained. Please use GitLab (https://gitlab.com/strace/strace/)
21 or GitHub (https://github.com/strace/strace/) repository instead.
23 * Changes in behaviour
24 * When printing string data, '8' and '9' following an octal escape sequence
25 no longer lead to unabbreviated octal escape sequence output, as they used
27 * Angle brackets are now printed as octal number escape sequences
28 in the output of paths associated with file descriptors.
29 * Data dump for write syscalls (-e write) is performed regardless
30 of successfulness of these syscall (addresses Debian bug #436284).
31 * -r and -t options are now affect output independently. Previously,
32 -r option led to ignoring of the -t option (addresses Debian bug #466195).
35 * Implemented delay injection (-e inject=SET:delay_enter= and
36 -e inject=SET:delay_exit= options).
37 * Added -A option for opening output files in append mode
38 (addresses Debian bug #528488).
39 * IPv6 addresses shown in socket information in -yy mode are now printed
41 * Enhanced decoding of bpf, prctl and ptrace syscalls.
42 * Enhanced decoding of BTRFS_IOC_INO_PATHS, BTRFS_IOC_LOGICAL_INO, and PTP_*
44 * Enhanced NETLINK_ROUTE protocol decoding.
45 * Updated lists of signal codes.
46 * Updated lists of BPF_*, BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
47 SCHED_FLAG_*, SCTP_* and error constants.
48 * Implemented block/character device number printing in -yy mode.
49 * Known pixel/SDR format names are printed as comments for pixelformat fields
51 * Enhanced decoding of kern_features syscall.
52 * Enhanced NETLINK_NETFILTER netlink protocol decoder.
53 * Optimized handling of large number of tracees.
54 * Improved wall clock time measurement in syscall count statistics
56 * Extended the range of allowed values in -e inject=...:retval= expression.
58 * Updated lists of ioctl commands from Linux 4.16.
59 * Enhanced manual page.
62 * Fixed build on m68k.
63 * Fixed v4l2 pixelformat decoding on big-endian architectures.
66 Noteworthy changes in release 4.21 (2018-02-13)
67 ===============================================
69 * Changes in behaviour
70 * Warning is now issued when -F option is used.
71 * Warning is now issued when a tracee with unsupported personality
73 * Unknown syscall numbers are now printed in hexadecimal form.
76 * Implemented decoding of netlink descriptor attributes as file descriptors.
77 * Implemented decoding of hugetlb page size selection flags.
78 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
79 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
80 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
81 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
82 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
83 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
85 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
86 * Implemented decoding of riscv_flush_icache syscall.
87 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
89 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
90 * Print values returned by mq_open syscall and first arguments
91 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
93 * Added decoding of get_tls syscall on arm.
94 * Added -e trace=%pure option for tracing system calls with no arguments that
96 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
97 SHM_*, and TCP_* constants.
98 * Added manual page for the strace-log-merge command.
99 * Updated lists of ioctl commands from Linux 4.15.
100 * Implemented biarch support for s390x.
101 * Implemented an optional support for symbol demangling in strace -k output
102 (activated by --with-libiberty configure option).
103 * Information about availability of demangling and reliable personality
104 decoding (on architectures with multiple personalities) is now available
106 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
107 powerpc and powerpc64.
108 * Enhanced manual page.
111 * Fixed multi-personality support in cross builds.
112 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
113 syscalls to %desc tracing set.
114 * Fixed path tracing support for mmap syscalls with indirect arguments and
115 for old select syscall.
116 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
117 * Fixed open mode flags decoding.
118 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
119 * Error counts that exceed one billion are now printed correctly in call
121 * Fixed call summary header for x32 personality.
122 * Changes of tracee personalities are reported more reliably.
123 * Fixed the case when strace attaches to a tracee being inside exec and its
124 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
125 which messed up all the syscall state tracking.
126 * Fixed printing of higher 32 bits of the return value for x32 personality.
129 * A C compiler that supports "for" loop initial declarations is now required.
130 * Inability to configure multiple personality support on architectures where
131 multiple personalities are supported leads to configuration failure during
132 build now. Use --enable-mpers=check to revert to the old behaviour.
133 * Build-time requirement for the mpers support has been lowered from gawk 4
135 * Removed incomplete and non-functional support for the CRIS architecture.
136 * Removed incomplete and unused support for IA-32 mode on the IA-64
139 Noteworthy changes in release 4.20 (2017-11-13)
140 ===============================================
143 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
144 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
146 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
147 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
149 * Added decoding of statx syscall on hppa.
150 * Updated lists of ioctl commands from Linux 4.14.
153 * Fixed powerpc personality support on powerpc64.
155 Noteworthy changes in release 4.19 (2017-09-05)
156 ===============================================
158 * Changes in behaviour
159 * Changed formatting of personality names on tile architecture in order
160 to make it in line with other multi-personality architectures.
161 * Changed field output order in struct v4l2_requestbuffers to improve in/out
163 * Changed handling of multiple signal= specifications in an injection
164 expression: multiple specification now leads to error instead of implicit
165 usage the last specification.
168 * Enhanced decoding of optlen argument of getsockopt syscall.
169 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
170 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
171 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
172 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
173 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
174 of setsockopt syscall.
175 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
176 (KDF parameters decoding).
177 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
178 * Enhanced decoding of UFFDIO_API ioctl command.
179 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
180 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
181 * Implemented decoding of linux socket filter programs specified
182 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
183 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
184 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
185 * Implemented NETLINK_SELINUX protocol specific decoding.
186 * Implemented decoding of netlink message ack flags.
187 * Implemented decoding of nlmsgerr netlink attributes.
188 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
189 * Implemented decoding of crypto_user_alg netlink attributes
191 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
192 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
194 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
195 * Improved handling of unexpected tracees (the ones that cloned with
196 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
197 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
198 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
199 * Added decoding of arch_prctl syscall on x86.
200 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
201 copy_file_range, preadv2, pwritev2, and statx on alpha.
202 * Added decoding of statx syscall on microblaze.
203 * Added decoding of s390_guarded_storage syscall on s390.
204 * Updated lists of ioctl commands from Linux 4.13.
205 * Enhanced manual page.
208 * Fixed printing of group_req structure on non-native personalities.
209 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
211 * Fixed formatting of nul-terminated strings which have kernel-imposed size
213 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
215 * Fixed build warnings on Android mips64.
216 * Fixed unused function "is_negated_errno" build warning when built
218 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
219 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
220 to use if Linux kernel has commit v4.10-rc1~114^2~2.
221 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
222 and inotify_init syscalls.
223 * Fixed personality switch printing on sparc64 and risc-v.
225 Noteworthy changes in release 4.18 (2017-07-05)
226 ===============================================
229 * Implemented decoding of SCM_TIMESTAMP* control messages.
230 * Implemented decoding of netlink NLMSG_DONE messages.
231 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
232 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
233 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
234 * Implemented decoding of NETLINK_GENERIC protocol families.
235 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
236 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
237 * Implemented basic decoding of netlink attributes.
238 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
239 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
240 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
241 netlink attributes of NETLINK_SOCK_DIAG.
242 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
243 SO_*, V4L2_*, and prctl ARCH_* constants.
244 * Updated lists of ioctl commands from Linux 4.12.
247 * In interactive mode (-I2), those signals that were blocked at startup
248 will remain blocked for the whole period of strace execution.
249 * strace no longer resets SIGCHLD handler in tracees to the default action.
250 * When traced command is terminated by a blocked signal, strace unblocks
251 that signal to ensure its own termination with the same signal.
252 * Fixed corner cases in decoding of old sigaction syscall.
253 * Fixed build with old kernel headers on mips.
254 * Fixed build on aarch64 and tile with glibc >= 2.26.
255 * Fixed build on arc and nios2.
257 Noteworthy changes in release 4.17 (2017-05-24)
258 ===============================================
260 * Changes in command line syntax
261 * Syscall classes specified in -e trace= option now have % prefix (like
262 -e trace=%process). Old style class names without leading % are still
263 supported, but considered deprecated now.
266 * Optimized syscall filtering.
267 * Improved representation of timestamps.
268 * Enhanced decoding of sched_setattr syscall.
269 * Added -e trace=%stat option for tracing variants of stat syscall.
270 * Added -e trace=%lstat option for tracing variants of lstat syscall.
271 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
273 * Added -e trace=%%stat option for tracing syscalls used for querying file
274 status information (stat, lstat, fstat, fstatat, statx, and their
276 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
278 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
280 * Added -e trace=%%statfs option for tracing syscalls used for querying file
281 system statistics information (statfs-like, fstatfs-like and ustat).
282 * Added -e trace=/regex option for filtering syscalls using regular
284 * Added support for prepending of question mark before syscall qualification
285 in -e trace expressions in order to suppress error in case no syscalls
286 matched the provided qualification.
287 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
288 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
289 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
291 * Implemented decoding of statx syscall.
292 * Implemented decoding of NS_* ioctl commands.
293 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
294 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
295 * Implemented decoding of NLMSG_ERROR netlink messages.
296 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
297 * Improved decoding of misplaced parts in DM_* ioctl commands.
298 * Updated lists of ioctl commands from Linux 4.11.
301 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
302 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
303 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
304 powerpc64, sh, sh64, sparc, and sparc64.
305 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
306 * Fixed decoding of netlink messages received within struct msghdr.
307 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
308 argument of sched_getattr syscall being not quite 32-bit.
309 * Fixed corner cases of printing inaccessible times argument of utimes
310 and futimesat syscalls.
312 Noteworthy changes in release 4.16 (2017-02-14)
313 ===============================================
316 * Implemented syscall return value injection (-e inject=SET:retval= option).
317 * Implemented signal injection (-e inject=SET:signal= option).
318 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
319 * Implemented decoding of all SG_* ioctl commands.
320 * Implemented decoding of ustat syscall.
321 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
322 and BPF_PROG_DETACH commands of bpf syscall.
323 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
324 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
326 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
327 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
328 * Updated lists of ioctl commands from Linux 4.10.
329 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
333 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
334 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
335 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
336 and pwritev* syscalls on x32.
337 * Fixed printing of string arguments of getxattr and setxattr syscalls
338 when -s option is used to limit the printed string size.
339 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
341 * Fixed decoding of SG_* and LOOP_* ioctl commands.
342 * Fixed build on mips with musl libc.
343 * Fixed cross-building of ioctlsort.
344 * Applied minor formatting fixes to the manual page.
346 Noteworthy changes in release 4.15 (2016-12-14)
347 ===============================================
349 * Changes in behavior
350 * Time stamps are now printed according to ISO 8601.
351 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
352 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
353 syscalls is now formatted as an array.
356 * Implemented syscall fault injection (-e fault=... option).
357 * Implemented decoding of DM_* ioctl commands.
358 * Implemented decoding of attr parameter of perf_event_open syscall.
359 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
360 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
361 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
363 * Implemented PTRACE_GETREGS API support on m68k.
364 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
365 and V4L2_* constants.
366 * Updated lists of ioctl commands from Linux 4.9.
367 * Added decoding of recently added syscalls on arc, x32, and xtensa.
368 * Enhanced manual page.
371 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
372 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
373 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
374 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
375 setgroups, setns, unshare, and utimes syscalls.
376 * Fixed handling of verbose flag in printing of controls array
377 of struct v4l2_ext_controls.
378 * Fixed omission of field names in the output of capability, sigaction,
379 sigevent, statfs, timespec, timeval, and utimbuf structures.
380 * Fixed printing of unknown syscalls in siginfo structure.
381 * Fixed decoding of ioctl constants on m68k.
382 * Fixed cris architecture support.
383 * Fixed cross build when host compiler does not support the same
384 set of warning flags as the cross compiler.
385 * Fixed build on SLE10 and SLE11.
387 Noteworthy changes in release 4.14 (2016-10-04)
388 ===============================================
390 * Changes in behavior
391 * When using -p option without a command and no processes has been attached,
392 strace exits with exit status 1.
395 * Added printing of the mode argument of open and openat syscalls
396 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
397 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
398 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
399 and aio family syscalls.
400 * Implemented fetching of the 7th subcall argument on mips o32.
401 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
403 * Updated lists of ioctl commands from Linux 4.8.
404 * Added decoding of new syscalls on sh and sh64.
405 * Added RISC-V architecture support.
408 * Marked io_setup and io_destroy as memory mapping related syscalls.
409 * Fixed leakage of placeholder descriptors to tracees.
410 * Fixed printing of mode_t, umode_t, and umask types.
411 * Fixed decoding of iovec arrays without a limit on total data size.
412 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
413 and ipc family syscalls.
414 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
415 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
417 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
418 * Fixed decoding of struct stat64 on sparc64.
419 * Fixed decoding of uid and gid-related syscalls on sparc64.
420 * Fixed decoding of the forth argument of semctl syscall on sparc64.
421 * Fixed values of tty ioctl constants on sparc64.
422 * Fixed sparc personality support on sparc64.
424 Noteworthy changes in release 4.13 (2016-07-26)
425 ===============================================
428 * Implemented a general netlink socket parser.
429 * Enhanced decoding of socket addresses.
430 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
431 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
432 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
433 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
434 and *_MAGIC constants.
435 * Updated lists of ioctl commands from Linux 4.7.
438 * Fixed decoding of pid_t argument of prlimit64 syscall.
439 * Fixed sign extension issues in the parser of struct rusage.
440 * Fixed race condition in decoding of timeout argument of recvmmsg and
441 rt_sigtimedwait syscalls.
442 * Fixed build with fresh linux kernel headers.
444 Noteworthy changes in release 4.12 (2016-05-31)
445 ===============================================
448 * Implemented simultaneous use of -p option and tracing of a command.
449 (addresses Debian bug #549942).
450 * Implemented caching of netlink conversations to reduce amount of time
451 spent in decoding socket details in -yy mode.
452 * Implemented -yy mode decoding of protocol:portid pairs associated with
453 netlink socket descriptors.
454 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
455 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
457 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
458 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
459 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
460 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
461 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
462 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
463 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
464 statfs64, tgkill, waitid, and xattr family syscalls.
465 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
466 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
467 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
468 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
469 * Added decoding of fadvise64 and fadvise64_64 on s390.
470 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
471 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
472 * Updated lists of ioctl commands from Linux 4.6.
475 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
476 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
477 * Fixed decoding of mlock2 syscall on sparc.
478 * Fixed decoding of osf_shmat syscall on alpha.
479 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
480 (addresses Debian bug #485979 and Fedora bug #1298294).
481 * Fixed decoding of preadv syscall in case of short read.
482 * Fixed decoding and dumping of readv syscall in case of short read.
483 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
484 * Fixed decoding of mincore syscall's last argument.
485 * Fixed remaining errors in mapping between syscall numbers and numbers
486 of syscall arguments.
487 * Applied various fixes to strace-graph script.
489 Noteworthy changes in release 4.11 (2015-12-21)
490 ===============================================
492 * Changes in behavior
493 * Some syscalls have different names depending on architecture and
494 personality. In these cases, syscall filtering and printing now
495 consistently uses the names that match corresponding __NR_* kernel
496 macros of the tracee's architecture and personality.
497 * Added strace prefix to all diagnostic messages.
500 * Enhanced and extended test suite.
501 * Implemented reliable tracing of processes whose personality differs
502 from the personality of strace, fixed decoding of 32-bit personality
503 syscalls on 64-bit architectures.
504 * When some data referenced by syscall arguments is irrelevant or cannot
505 be read from tracee's memory, strace now prints its address consistently.
506 * When a syscall is restarted using restart_syscall mechanism, strace now
507 shows the syscall name on architectures that expose this information.
508 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
509 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
510 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
511 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
512 * Optimized decoding of indirect socket syscalls.
513 * Implemented decoding of nanoseconds along with seconds in stat family
514 syscalls (addresses Fedora bug #1251176).
515 * Implemented decoding of struct statfs.f_flags in statfs syscall.
516 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
518 * Implemented decoding of indirect syscall on mips o32.
519 * Implemented decoding of IPPROTO_IP control messages.
520 * Implemented decoding of setsockopt syscall multicast arguments.
521 * Enhanced decoding of struct sigevent.
522 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
523 and v4l2 ioctl syscall arguments.
524 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
525 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
526 sendfile, setsockopt, and shmctl syscalls.
527 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
528 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
529 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
530 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
531 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
532 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
534 * Added Nios II architecture support.
535 * Added new syscall entries to match Linux 4.4.
538 * Fixed potential short read of strings from tracee's memory.
539 * Fixed -qq option in conjunction with -o option.
540 * Fixed filtering of <unavailable> syscalls.
541 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
542 with 64-bit aligned structures.
543 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
544 syscall flags arguments.
545 * Fixed decoding of 4th argument of clock_nanosleep syscall.
546 * Fixed decoding of getpagesize syscall on m68k.
547 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
548 * Fixed decoding of timezone argument of gettimeofday and settimeofday
550 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
552 * Fixed decoding of pipe syscall on alpha and mips.
553 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
554 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
555 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
557 * Fixed decoding of 4th argument of semctl indirect syscall.
558 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
559 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
560 * Fixed decoding of struct dirent on x32.
561 * Fixed decoding of times syscall return value on mips n32 and x32.
562 * Fixed decoding of path argument of umount2 syscall
563 (addresses Debian bug #785050).
564 * Worked around a kernel bug in tracing privileged executables.
565 * Fixed various errors in mapping between syscall numbers and associated
566 information like the number of syscall arguments, the name of syscall,
569 Noteworthy changes in release 4.10 (2015-03-06)
570 ===============================================
573 * Added -yy option to print protocol and address information associated with
575 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
576 recvmsg, sendmmsg, and recvmmsg syscalls.
577 * Implemented full 32-bit decoding of ioctl commands
578 (addresses Debian bug #692913 and Fedora bug #902788).
579 * Implemented PTRACE_GETREGS API support on ia64.
580 * Implemented PTRACE_GETREGS API support on mips.
581 * Implemented PTRACE_GETREGSET API support on s390/s390x.
582 * Implemented decoding of getrandom and seccomp syscalls.
583 * Implemented full decoding of 64-bit capability sets.
584 * Implemented decoding of all prctl commands.
585 * Implemented decoding of parametrized ioctl commands.
586 * Implemented decoding of evdev ioctl commands.
587 * Implemented decoding of v4l ioctl commands.
588 * Implemented decoding of SG_IO v4 ioctl commands.
589 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
590 * Implemented decoding of FALLOC_FL_* fallocate flags.
591 * Implemented decoding of rt_sigreturn signal mask on aarch64,
593 * Enhanced socket decoder to support bluetooth sockets.
594 * Enhanced decoding of unlisted ioctl commands.
595 * Enhanced decoding of getsockopt and setsockopt syscall.
596 * Enhanced decoding of sysinfo syscall.
597 * Enhanced decoding of struct cmsghdr.
598 * Enhanced decoding of wait status.
599 * Enhanced aio support on non-x86 architectures by using external libaio.h.
600 * Added O_TMPFILE to the list of recognized open mode flags.
601 * Updated the list of filesystem type constants that is used in decoding
602 statfs family syscalls.
603 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
605 * Updated lists of signal constants from Linux 3.19.
606 * Updated lists of errno constants from Linux 3.19.
607 * Updated lists of ioctl commands from Linux 3.9.
608 * Added new syscall entries to match Linux 3.19.
611 * Fixed various errors in mapping between syscall numbers and associated
612 information like the number of syscall arguments, the name of syscall,
614 * Fixed quoting issues in printing descriptors, filenames, network interface
615 names, struct utsname members, device/volume names of BLK* ioctl commands.
616 * Fixed uid_t/git_t decoding.
617 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
618 * Fixed potential open flags truncation on some architectures.
619 * Fixed decoding of struct ifreq.ifr_name.
620 * Fixed decoding of SIOCSIFNAME ioctl command.
621 * Fixed decoding of RENAME_* renameat2 flags.
622 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
623 * Fixed decoding of indirect ipc subcalls on some architectures.
624 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
625 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
626 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
627 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
628 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
629 sparc, sparc64, mips, and s390.
630 * Fixed instruction pointer output (-i option) on architectures that support
631 several personalities.
632 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
634 * Fixed build on systems where struct sigaction has no sa_restorer member.
635 * Fixed build with uclibc and musl libc.
638 * Linux kernel >= 2.5.46 is required.
639 Older versions without a decent PTRACE_SETOPTIONS support will not work.
640 * On mips, linux kernel >= 2.6.15 is required.
641 Older versions without a decent PTRACE_GETREGS support will not work.
642 * On s390 and s390x, linux kernel >= 2.6.27 is required.
643 Older versions without a decent PTRACE_GETREGSET support will not work.
645 Noteworthy changes in release 4.9 (2014-08-15)
646 ==============================================
648 * Changes in behavior
649 * Disabled OABI support on ARM EABI systems by default,
650 added --enable-arm-oabi option to enable it at configure time.
653 * Added experimental -k option to print stack trace after each traced syscall.
654 * Added -w option to produce stats on syscall latency.
655 (addresses Debian bug #457497).
656 * Added ARC architecture support.
657 * Added PTRACE_GETREGS API support on PowerPC.
658 * Enhanced Bionic libc and musl libc support.
659 * Enhanced tracing of x86 personality processes on x86_64 and x32.
660 * Enhanced tracing of ARM personality processes on AArch64.
661 * Enhanced 32/64bit personality detection on PowerPC.
662 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
663 renameat2, and request_key syscalls.
664 * Robustified decoding of select, pselect, and io_submit syscalls.
665 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
666 setdomainname, sethostname, setns, and sync_file_range syscalls.
667 * Enhanced decoding of signal bitmasks.
668 * Enhanced decoding of file descriptors.
669 * Enhanced siginfo_t decoding.
670 * Enhanced PF_NETLINK decoding.
671 * Updated CLOCK_* constants
672 (addresses Fedora bug #1088455).
673 * Added new syscall entries to match Linux 3.16.
676 * Added shmat and shmdt to the set of memory mapping related syscalls.
677 * Fixed detaching from stopped processes.
678 * Fixed fanotify_mark decoding on 32bit architectures.
679 * Fixed offset decoding in preadv and pwritev syscalls.
680 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
681 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
682 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
683 (addresses Fedora bug #993384).
684 * Miscellaneous corrections in the manual page.
685 (Addresses Debian bug #725987).
687 Noteworthy changes in release 4.8 (2013-06-03)
688 ==============================================
690 * Changes in behavior
691 * In case of normal strace termination, when the trace output is
692 redirected to a pipe, strace now closes it and waits for the pipe
693 process termination before exit.
696 * Implemented tracing using PTRACE_SEIZE API (when available).
697 * Implemented more reliable PTRACE_GETREGSET-based process personality
698 detection on x86-64 and x32 (when available).
699 * Added -e trace=memory option for tracing memory mapping related syscalls.
700 * Documented -b option.
701 * Allowed exit status messages to be suppressed by giving -q option twice.
702 * Added AArch64 architecture support
703 (addresses Debian bug #693074 and Fedora bug #969858).
704 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
705 * Added tilegx personality support for Tile.
706 * Enhanced support of NOMMU architectures.
707 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
709 * Added new syscall entries to match Linux 3.9.
710 * Regenerated the list of common ioctl names from Linux 3.9.
711 * Updated the list of errno constants.
712 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
713 PTRACE_O_*, and TCP_* constants.
714 * Implemented decoding of UBI ioctls.
715 * Removed redundant "*32" ioctl names.
718 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
719 (addresses Fedora bug #659382).
720 * Fixed kernel release string parsing
721 (addresses Debian bug #702309).
722 * Fixed decoding of *xattr syscalls
723 (addresses Fedora bug #885233).
724 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
725 (addresses Fedora bug #912790).
726 * Fixed tracing forks on SPARC.
727 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
728 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
729 and truncate64 syscalls.
730 * Fixed categories of multiple syscalls on most of supported architectures.
731 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
732 * Fixed decoding of multiple 32-bit personality syscalls on x32.
733 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
734 S390x, and Tile architectures.
735 * Fixed semtimedop decoding on S390x.
736 * Fixed sram_alloc decoding on Blackfin.
737 * Fixed build when process_vm_readv is a stab.
738 * Fixed build with older versions of libaio.h.
740 Noteworthy changes in release 4.7 (2012-05-02)
741 ==============================================
743 * Changes in behavior
744 * strace no longer suspends waitpid until there is a child
745 for waitpid'ing process to collect status from.
746 * strace no longer detaches from a tracee which is supposed
748 * strace now issues a new message: "+++ exited with EXITCODE +++"
749 which shows exact moment strace got exit notification,
750 analogous to existing "+++ killed by SIG +++" message.
753 * Added x32 personality support (x86_64 architecture).
754 * Added -y and -P options to print file descriptor paths and
755 filter by those paths.
756 * Added -I option to control strace interactivity.
757 * Allowed -p option to take comma or whitespace-separated list of PIDs.
758 * Added strace_log_merge script helper to merge timestamped "strace -ff"
760 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
761 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
762 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
763 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
764 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
765 listxattr, setrlimit and swapon syscalls.
766 * Implemented decoding of loop and mtd ioctls.
767 * Added syscall entries for new linux syscalls.
768 * Added syscall entries for direct socket system calls on powerpc.
769 * Updated the list of errno constants.
770 * Updated lists of MSG_*, STA_*, and TCP_* constants.
771 * Regenerated the list of ioctl names from Linux 3.3.
772 * Enhanced switching between processes with different personalities.
773 * Enhanced signals reporting by using short signal names.
774 * Made ERESTART* messages more descriptive.
775 * Made parsing of numbers from strings more robust.
776 * Added support for compat_statfs64 and statfs64.f_flags.
777 * Changed read of data blocks to use single process_vm_readv syscall
778 (when available) instead of several PTRACE_PEEKDATA operations.
779 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
780 operation instead of several PTRACE_PEEKUSER operations.
781 * Applied various optimizations to make strace work faster.
784 * Implemented proper handling of real SIGTRAPs on kernels supporting
785 PTRACE_O_TRACESYSGOOD.
786 (Addresses Fedora bug #162774).
787 * Fixed sockaddr_un.sun_path name in decoded output.
788 (Addresses Debian bug #554946).
789 * Fixed to avoid potential core file clobbering on exit.
790 (Addresses Debian bug #656398).
791 * Fixed a typo in documentation.
792 (Addresses Debian bug #653309).
793 * Fixed decoding of timer id returned by timer_create.
794 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
795 * Fixed *at syscalls flags decoding.
796 * Fixed ARM EABI 64-bit syscall's arguments decoding.
797 * Fixed semtimedop decoding on s390.
798 * Fixed osf_sigprocmask decoding on alpha.
799 * Fixed ipc and socket subcall decoding on several architectures.
800 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
801 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
802 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
803 * Corrected io_* syscall entries on ARM.
804 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
805 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
806 * Fixed build when libaio-devel is not available.
807 * Fixed configure checks for PTRACE_* constants.
808 * Fixed compilation warnings remained on several architectures.
811 * Removed all non-Linux code. After years of neglect, that dead code
812 just hampered further strace development.
813 * Linux kernel >= 2.6.18 is recommended. Older versions might still
814 work but they haven't been thoroughly tested with this release.
816 Noteworthy changes in release 4.6 (2011-03-15)
817 ==============================================
819 * Changes in behavior
820 * Print diagnostic information about changes in personality mode to
821 standard error instead of standard output.
824 * Implemented a new method of following clone, fork, and vfork
825 syscalls using the Linux kernel's explicit facilities for tracing
826 creation of threads and child processes.
827 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
828 * Implemented decoding of TLS syscalls on m68k.
829 * Implemented biarch support on powerpc64.
830 * Implemented biarch support for getrlimit() and setrlimit().
831 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
832 * Implemented SOL_SCTP socket options decoding.
833 * Added HDIO_* ioctl names.
834 (Addresses Debian bug #450953).
835 * Added LOOP_* ioctl names.
836 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
837 to match Linux 2.6.37.
838 * Updated the list of IPPROTO_* constants to match netinet/in.h.
839 * Implemented decoding of HDIO_* and BLK* ioctls.
840 * Added MicroBlaze architecture support.
841 * Added new syscall entries to match Linux 2.6.37.
842 * Regenerated list of ioctl names from Linux 2.6.37.
843 * Enhanced signal notification decoding.
844 * Documented -C and -D options.
847 * Fixed fetching syscall arguments on m68k.
848 * Fixed an error when judging whether a process has children.
849 * Fixed get/set_robust_list syscall numbers for powerpc.
850 * Fixed a corner case in printing clone flags.
851 * Fixed cross-compiling issues.
852 * Fixed build issues on powerpc64, SH and SPARC.
853 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
854 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
855 fanotify_init, and fanotify_mark syscalls.
856 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
857 * Fixed biarch support in IO dumping.
858 * Fixed raw exit_group decoding.
859 * Fixed decoding of file descriptors on 64-bit architectures.
860 * Fixed a corner case in waitpid handling.
861 (Addresses Red Hat bug #663547).
862 * Fixed stat64 decoding on mips
863 (Addresses Debian bug #599028).
864 * Fixed misleading italics in the manual page.
865 (Addresses Debian bug #589323).
867 Noteworthy changes in release 4.5.20 (2010-04-13)
868 =================================================
871 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
872 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
873 rt_tgsigqueueinfo, perf_event_open.
874 * Enhanced decoding of recently added syscalls on non-x86 architectures
875 by replacing a bare decoder with elaborate parsers enabled earlier
877 * Implemented -C option to combine regular and -c output.
878 (Addresses Debian bug #466196)
879 * Enhanced decoding of mbind and mremap syscalls.
880 * Enhanced SOL_PACKET socket options decoding.
881 * Regenerated list of ioctl names from linux 2.6.33.
882 * Added TILE architecture support.
885 * Fixed build with Linux kernel headers 2.6.32-rc5+.
886 (Addresses Debian bug #560516 and Fedora bug #539044)
887 * Fixed build on mips.
888 * Fixed handling of Linux systems without struct statfs64.
889 * Fixed reporting signal mask by sigreturn on powerpc.
890 * Fixed potential stack buffer overflow in select decoder.
891 (Addresses Fedora bug #556678)
892 * Corrected msgsnd indirect ipccall decoding.
893 * Corrected decoding of 64bit syscalls.
894 (Addresses Debian bug #570603)
895 * Corrected getsockopt decoding on architectures where
896 sizeof(long) > sizeof(int).
897 (Addresses Debian bug #494844)
898 * Corrected decoding of epoll_pwait.
899 (Addresses Debian bug #513014)
900 * Corrected handling of killed threads.
902 Noteworthy changes in release 4.5.19 (2009-10-21)
903 =================================================
905 * Changes in behavior
906 * When command exits, strace now exits with the same exit status.
907 If command is terminated by a signal, strace terminates itself
908 with the same signal, so that strace can be used as a wrapper
909 process transparent to the invoking parent process.
910 When using -p option, the exit status of strace is zero unless
911 there was an unexpected error in doing the tracing.
912 (Addresses Fedora bug #105371 and Debian bug #37665)
915 * Implemented decoding of new Linux syscalls: accept4, dup3,
916 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
917 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
918 * Implemented decoding of accept4 socketcall.
919 * Enhanced prctl decoding.
920 * Enhanced nanosleep decoding.
921 * Enhanced ptrace decoding.
922 * Enhanced futex decoding.
923 * Enhanced CAP_* decoding.
924 * Enhanced SIOCS* ioctls decoding.
925 * Enhanced fcntl F_* flags decoding.
926 * Enhanced semop/semtimedop decoding.
927 * Updated ARM architecture support.
928 * Added Blackfin architecture support.
929 * Added AVR32 architecture support.
930 * Added CRIS architecture support.
931 * Made strace detect when traced process suddenly disappeared.
934 * Fixed syscall numbers for tee and sync_file_range.
935 (Addresses Debian bug #503124)
936 * Fixed several bugs in strings decoder, including potential heap
938 (Addresses Fedora bugs #470529, #478324 and #511035)
939 * Marked sendfile(2) as a network syscall.
940 (Addresses Debian bug #509499)
941 * Fixed accept(2) decoding.
942 (Addresses Debian bug #507573)
943 * Fixed sigtimedwait(2) decoding.
944 * Fixed build on ARM EABI.
945 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
946 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
947 (Addresses Red Hat bug #471169)
948 * Fixed display of 32-bit argv array on 64-bit architectures.
949 (Addresses Fedora bug #519480)
950 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
951 * Fixed HPPA architecture support.
952 (Addresses Debian bugs #437928 and #546619)
957 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
958 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
963 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
964 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
965 * Improved output for prctl system call on Linux.
966 * Improved support for Linux/ARM.
967 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
972 * Improved output for delete_module, futex, and mbind system calls on Linux.
973 * Improved output for SG_IO ioctls on Linux.
974 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
975 eventfd, getcpu, epoll_pwait.
980 * Several biarch improvements.
981 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
982 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
987 * Accept numeric system calls in -e.
992 * Introduce "-e trace=desc".
997 * Better x86-64 support for IA32 processes.
998 * Update PowerPC system calls.
999 * Better printing for Linux aio system calls.
1003 * Quick fix release for build issues.
1004 * One fix for Linux/ARM system call table.
1009 * Print fault address for SIGSEGV/SIGBUS signals when available.
1014 * Improve socket ioctl printing.
1015 * Update Linux/IA64 syscall list.
1016 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
1017 * Improve mount flags printing.
1018 * Support symbolic printing of x86_64 arch_prctl parameters.
1023 * Update syscall tables for Alpha, ARM, HPPA.
1024 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
1025 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
1026 * Improve ioctl command name matching.
1027 * Print RTC_* ioctl structure contents.
1028 * Support newer RLIMIT_* values.
1029 * Print struct cmsghdr details in sendmsg.
1034 * Print attribute values in *xattr system calls on Linux.
1035 * Include pread and pwrite calls in -e read and -e write tracing.
1036 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
1037 * Print clock_t values symbolically in Linux clock_* system calls.
1041 * Bug fixes, Linux ioctl updates.
1042 * David Miller contributed support for Linux/SPARC64.
1050 * Update Linux ioctl lists.
1051 * Update PF_* and AF_* value lists.
1052 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1057 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1058 * Handle new mq_* system calls in Linux 2.6.6 and later.
1063 * Report some new VM_* bit values on Linux.
1064 * Better output for Linux sched_* system calls.
1069 * Display multiple ioctl name matches on Linux.
1073 * New port to AMD's x86-64 architecture. One strace binary can
1074 handle both new x86-64 and old i386 processes.
1075 * Fixed support for LFS64 calls.
1076 * New switch -E to add/remove environment variables for the command.
1077 * Merged s390/s390x port.
1078 * Trace an unbounded number of processes.
1079 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1080 * Fixed bugs with attach/detach leaving things stopped.
1081 * Fixed traced process seeing ECHILD despite live, traced children
1082 in waitpid calls with WNOHANG.
1083 * Stuart Menefy contributed a port to Linux/SH.
1084 * Stephen Thomas contributed a port to Linux/SH64.
1085 * Many other bug fixes.
1089 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1090 * Fix the ioctl setup for Linux, turned out it did not really work.
1091 Improve the ioctl extractor as well so we decode some more ones.
1095 * compile fixes for Linux/mips
1099 * Linux ia64 and hppa ports added
1100 * The usual Linux syscall updates (includes 32bit uid/gid support),
1101 * Linux ioctl list updated
1102 * Support IPv6 scope ids
1103 * FreeBSD/i386 port added
1104 * UnixWare and Solaris updates
1105 * Better support for tracing multithreaded processes in Linux
1109 * Compiles on glibc2.0 systems again
1110 * Linux/S390 port added
1111 * The usual Linux syscall updates
1112 * we can follow fork on arm now
1116 * Linux/MIPS port added
1117 * Lots of Linux updates again
1118 * Improved IPv6 support
1124 * Compiles on glibc2.0 systems again
1128 * Get stat structure properly on Linux 64bit archs
1129 * Personalities work again
1130 * Compile correctly on SunOS again
1136 * Linux (ultra)sparc fixes
1143 * add support for more Linux architectures (powerpc, sparc, arm)
1144 * support lots more Linux syscalls
1145 * fix signal handling
1146 * add IPX and IPIP support
1147 * check stray syscall after execv
1148 * fix hanging children
1150 Changes in version 3.1
1151 ======================
1153 * Irix5 is supported
1154 * Linux 68k is supported
1155 * Linux alpha is supported
1156 * configure is upgraded to autoconf 2.x
1157 * using -f in combination with -e now works correctly
1158 * output can be piped to a program
1159 * tracing setuid programs works better
1160 * it is now reasonable to install strace setuid to root in some circumstances
1161 * new useful tracing names like file and process to trace whole
1162 classes of system calls, e.g. -efile traces all system calls that
1163 take a file name as an argument
1164 * IPC calls on SunOS 4.1.x are decoded
1165 * Linux program memory is reliably dereferenced
1166 * Linux decodes at least the name of all syscalls as of pre2.0.4
1167 * various cosmetic changes and bug fixes
1169 Changes from versions 2.x to version 3.0
1170 ========================================
1172 * filename arguments are neither abbreviated nor stringified
1173 * string arguments are now true C strings using octal instead of hex by default
1174 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1175 * by default the output for multiple processes now goes into one file
1176 * all structures, vectors, bitsets, etc. use consistent output formats
1177 * the -c option now means count calls, -i does what the old -c used to do
1179 New Features in version 3.0
1180 ===========================
1182 * non-ascii strings can be optionally printed entirely in hex
1183 * the output format is readable when multiple processes are generating output
1184 * exit values are printed in an alignment column
1185 * is is possible to suppress messages about attaching and detaching
1186 * various tracing features can be enabled on a per syscall/signal/desc basis
1187 * selective tracing of syscalls
1188 * selective printing of syscall structures
1189 * selective abbreviation of long structures on a per syscall basis
1190 * selective printing of raw syscall arguments and results
1191 * selective tracing of signals
1192 * selective dumping of all I/O read from file descriptors
1193 * selective dumping of all I/O written to file descriptors
1194 * optional counting of time, calls, and errors for each syscall
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