1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Implemented decoding of kvm vcpu exit reason (-e kvm=vcpu option),
6 requires Linux kernel version 4.16.0 or higher.
7 * Implemented decoding of KVM_SET_CPUID2 and KVM_GET_*_CPUID ioctl commands.
8 * Enhanced decoding of corner cases of SO_LINGER, SO_PEERCRED,
9 and PACKET_STATISTICS getsockopt options.
10 * Wired up io_pgetevents and rseq syscalls on hppa, microblaze, mips, powerpc,
12 * Updated lists of AUDIT_*, BPF_*, IFA_*, IFLA_*, RTA_*, RTPROT_*, TCP_*,
13 TRAP_*, and UDP_* constants.
16 * Fixed decoding of Q_XGETQSTAT on non-native personalities.
17 * Fixed race condition in aio test.
18 * Fixed build with Bionic libc.
20 Noteworthy changes in release 4.23 (2018-06-14)
21 ===============================================
23 * Changes in behaviour
24 * On x32 personality, 64-bit syscalls (such as readv) are now shown with "#64"
25 suffix instead of "64:" prefix. Unlike the old names, these new names
26 can be used in syscall qualification expressions.
27 * Changed error number output format: error numbers are consistently
28 printed as "-1 ECONST (Error description)"
29 for known errors and as "-1 (errno 123)" for unknown errors,
30 regardless of -e raw qualification settings. One can specify
31 -X raw for displaying raw error numbers unconditionally.
32 * Unfetchable addresses inside arrays are now printed as comments.
33 * Obsolete IA-32 mode syscall names are no longer printed on ia64.
36 * Implemented libdw backend for -k option, configured at build time
37 using --with-libdw option.
38 Whether -k option is compiled is now configured at build time
39 using --enable-stacktrace option.
40 * Added -X option for configuring xlat output formatting (addresses
42 * Added support for personality designation ("64", "32", or "x32") to syscall
43 qualifications in -e trace expressions.
44 * Implemented injection of syscalls with no side effects as an alternative
45 to injection of an invalid syscall (-e inject=SET:syscall= expression).
46 * Improved support for reproducible builds (addresses Debian bug #896016).
47 * Implemented decoding of BPF_PROG_QUERY and BPF_RAW_TRACEPOINT_OPEN bpf
49 * Implemented decoding of INOTIFY_IOC_SETNEXTWD and PERF_EVENT_IOC_* ioctl
51 * Implemented decoding of PR_GET_SPECULATION_CTRL and PR_SET_SPECULATION_CTRL
52 prctl syscall options.
53 * Enhanced decoding of bpf, getsockopt, setsockopt, and socket syscalls.
54 * Enhanced decoding of NETLINK_KOBJECT_UEVENT and NETLINK_ROUTE protocols.
55 * Enhanced decoding of *_DIAG_MEMINFO netlink attributes.
56 * Enhanced decoding of BTRFS_*, FS_IOC_*, SIOCGIFHWADDR, and SIOCSIFHWADDR
58 * Enhanced decoding of AF_BLUETOOTH socket addresses.
59 * Implemented decoding of io_pgetevent syscall.
60 * Wired up rseq syscall.
61 * Updated lists of ADJ_*, BPF_*, BPF_F_*, BPF_PROG_TYPE_*, ETH_P_*, FPE_*,
62 IFF_*, IPPROTO_*, MAP_*, MS_*, MSG_*, NETLINK_*, PACKET_*, PROT_*, SCTP_*,
63 SECCOMP_FILTER_FLAG_*, SEGV_*, SEM_*, SHM_*, SW_*, V4L2_CID_*,
64 V4L2_CTRL_CLASS_*, and V4L2_PIX_FMT_* constants.
65 * Updated lists of ioctl commands from Linux 4.17.
68 * Fixed decoding of msgtyp argument of msgrcv syscall.
69 * Fixed fallback definitions for F_*, MCL_*, MSG_ZEROCOPY, SI_*,
70 and SOL_SOCKET constants.
71 * Fixed -e trace=%pure expression on mips.
73 Noteworthy changes in release 4.22 (2018-04-05)
74 ===============================================
76 * Changes in infrastructure
77 * The mailing list was moved to strace-devel@lists.strace.io.
78 * SourceForge git repository
79 (https://sourceforge.net/p/strace/code/ci/master/tree/) is no longer
80 maintained. Please use GitLab (https://gitlab.com/strace/strace/)
81 or GitHub (https://github.com/strace/strace/) repository instead.
83 * Changes in behaviour
84 * When printing string data, '8' and '9' following an octal escape sequence
85 no longer lead to unabbreviated octal escape sequence output, as they used
87 * Angle brackets are now printed as octal number escape sequences
88 in the output of paths associated with file descriptors.
89 * Data dump for write syscalls (-e write) is performed regardless
90 of successfulness of these syscall (addresses Debian bug #436284).
91 * -r and -t options are now affect output independently. Previously,
92 -r option led to ignoring of the -t option (addresses Debian bug #466195).
95 * Implemented delay injection (-e inject=SET:delay_enter= and
96 -e inject=SET:delay_exit= options).
97 * Added -A option for opening output files in append mode
98 (addresses Debian bug #528488).
99 * IPv6 addresses shown in socket information in -yy mode are now printed
101 * Enhanced decoding of bpf, prctl and ptrace syscalls.
102 * Enhanced decoding of BTRFS_IOC_INO_PATHS, BTRFS_IOC_LOGICAL_INO, and PTP_*
104 * Enhanced NETLINK_ROUTE protocol decoding.
105 * Updated lists of signal codes.
106 * Updated lists of BPF_*, BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
107 SCHED_FLAG_*, SCTP_* and error constants.
108 * Implemented block/character device number printing in -yy mode.
109 * Known pixel/SDR format names are printed as comments for pixelformat fields
111 * Enhanced decoding of kern_features syscall.
112 * Enhanced NETLINK_NETFILTER netlink protocol decoder.
113 * Optimized handling of large number of tracees.
114 * Improved wall clock time measurement in syscall count statistics
116 * Extended the range of allowed values in -e inject=...:retval= expression.
117 * Added i18n support.
118 * Updated lists of ioctl commands from Linux 4.16.
119 * Enhanced manual page.
122 * Fixed build on m68k.
123 * Fixed v4l2 pixelformat decoding on big-endian architectures.
126 Noteworthy changes in release 4.21 (2018-02-13)
127 ===============================================
129 * Changes in behaviour
130 * Warning is now issued when -F option is used.
131 * Warning is now issued when a tracee with unsupported personality
133 * Unknown syscall numbers are now printed in hexadecimal form.
136 * Implemented decoding of netlink descriptor attributes as file descriptors.
137 * Implemented decoding of hugetlb page size selection flags.
138 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
139 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
140 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
141 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
142 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
143 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
145 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
146 * Implemented decoding of riscv_flush_icache syscall.
147 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
149 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
150 * Print values returned by mq_open syscall and first arguments
151 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
153 * Added decoding of get_tls syscall on arm.
154 * Added -e trace=%pure option for tracing system calls with no arguments that
156 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
157 SHM_*, and TCP_* constants.
158 * Added manual page for the strace-log-merge command.
159 * Updated lists of ioctl commands from Linux 4.15.
160 * Implemented biarch support for s390x.
161 * Implemented an optional support for symbol demangling in strace -k output
162 (activated by --with-libiberty configure option).
163 * Information about availability of demangling and reliable personality
164 decoding (on architectures with multiple personalities) is now available
166 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
167 powerpc and powerpc64.
168 * Enhanced manual page.
171 * Fixed multi-personality support in cross builds.
172 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
173 syscalls to %desc tracing set.
174 * Fixed path tracing support for mmap syscalls with indirect arguments and
175 for old select syscall.
176 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
177 * Fixed open mode flags decoding.
178 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
179 * Error counts that exceed one billion are now printed correctly in call
181 * Fixed call summary header for x32 personality.
182 * Changes of tracee personalities are reported more reliably.
183 * Fixed the case when strace attaches to a tracee being inside exec and its
184 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
185 which messed up all the syscall state tracking.
186 * Fixed printing of higher 32 bits of the return value for x32 personality.
189 * A C compiler that supports "for" loop initial declarations is now required.
190 * Inability to configure multiple personality support on architectures where
191 multiple personalities are supported leads to configuration failure during
192 build now. Use --enable-mpers=check to revert to the old behaviour.
193 * Build-time requirement for the mpers support has been lowered from gawk 4
195 * Removed incomplete and non-functional support for the CRIS architecture.
196 * Removed incomplete and unused support for IA-32 mode on the IA-64
199 Noteworthy changes in release 4.20 (2017-11-13)
200 ===============================================
203 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
204 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
206 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
207 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
209 * Added decoding of statx syscall on hppa.
210 * Updated lists of ioctl commands from Linux 4.14.
213 * Fixed powerpc personality support on powerpc64.
215 Noteworthy changes in release 4.19 (2017-09-05)
216 ===============================================
218 * Changes in behaviour
219 * Changed formatting of personality names on tile architecture in order
220 to make it in line with other multi-personality architectures.
221 * Changed field output order in struct v4l2_requestbuffers to improve in/out
223 * Changed handling of multiple signal= specifications in an injection
224 expression: multiple specification now leads to error instead of implicit
225 usage the last specification.
228 * Enhanced decoding of optlen argument of getsockopt syscall.
229 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
230 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
231 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
232 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
233 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
234 of setsockopt syscall.
235 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
236 (KDF parameters decoding).
237 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
238 * Enhanced decoding of UFFDIO_API ioctl command.
239 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
240 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
241 * Implemented decoding of linux socket filter programs specified
242 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
243 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
244 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
245 * Implemented NETLINK_SELINUX protocol specific decoding.
246 * Implemented decoding of netlink message ack flags.
247 * Implemented decoding of nlmsgerr netlink attributes.
248 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
249 * Implemented decoding of crypto_user_alg netlink attributes
251 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
252 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
254 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
255 * Improved handling of unexpected tracees (the ones that cloned with
256 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
257 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
258 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
259 * Added decoding of arch_prctl syscall on x86.
260 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
261 copy_file_range, preadv2, pwritev2, and statx on alpha.
262 * Added decoding of statx syscall on microblaze.
263 * Added decoding of s390_guarded_storage syscall on s390.
264 * Updated lists of ioctl commands from Linux 4.13.
265 * Enhanced manual page.
268 * Fixed printing of group_req structure on non-native personalities.
269 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
271 * Fixed formatting of nul-terminated strings which have kernel-imposed size
273 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
275 * Fixed build warnings on Android mips64.
276 * Fixed unused function "is_negated_errno" build warning when built
278 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
279 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
280 to use if Linux kernel has commit v4.10-rc1~114^2~2.
281 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
282 and inotify_init syscalls.
283 * Fixed personality switch printing on sparc64 and risc-v.
285 Noteworthy changes in release 4.18 (2017-07-05)
286 ===============================================
289 * Implemented decoding of SCM_TIMESTAMP* control messages.
290 * Implemented decoding of netlink NLMSG_DONE messages.
291 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
292 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
293 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
294 * Implemented decoding of NETLINK_GENERIC protocol families.
295 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
296 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
297 * Implemented basic decoding of netlink attributes.
298 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
299 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
300 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
301 netlink attributes of NETLINK_SOCK_DIAG.
302 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
303 SO_*, V4L2_*, and prctl ARCH_* constants.
304 * Updated lists of ioctl commands from Linux 4.12.
307 * In interactive mode (-I2), those signals that were blocked at startup
308 will remain blocked for the whole period of strace execution.
309 * strace no longer resets SIGCHLD handler in tracees to the default action.
310 * When traced command is terminated by a blocked signal, strace unblocks
311 that signal to ensure its own termination with the same signal.
312 * Fixed corner cases in decoding of old sigaction syscall.
313 * Fixed build with old kernel headers on mips.
314 * Fixed build on aarch64 and tile with glibc >= 2.26.
315 * Fixed build on arc and nios2.
317 Noteworthy changes in release 4.17 (2017-05-24)
318 ===============================================
320 * Changes in command line syntax
321 * Syscall classes specified in -e trace= option now have % prefix (like
322 -e trace=%process). Old style class names without leading % are still
323 supported, but considered deprecated now.
326 * Optimized syscall filtering.
327 * Improved representation of timestamps.
328 * Enhanced decoding of sched_setattr syscall.
329 * Added -e trace=%stat option for tracing variants of stat syscall.
330 * Added -e trace=%lstat option for tracing variants of lstat syscall.
331 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
333 * Added -e trace=%%stat option for tracing syscalls used for querying file
334 status information (stat, lstat, fstat, fstatat, statx, and their
336 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
338 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
340 * Added -e trace=%%statfs option for tracing syscalls used for querying file
341 system statistics information (statfs-like, fstatfs-like and ustat).
342 * Added -e trace=/regex option for filtering syscalls using regular
344 * Added support for prepending of question mark before syscall qualification
345 in -e trace expressions in order to suppress error in case no syscalls
346 matched the provided qualification.
347 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
348 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
349 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
351 * Implemented decoding of statx syscall.
352 * Implemented decoding of NS_* ioctl commands.
353 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
354 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
355 * Implemented decoding of NLMSG_ERROR netlink messages.
356 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
357 * Improved decoding of misplaced parts in DM_* ioctl commands.
358 * Updated lists of ioctl commands from Linux 4.11.
361 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
362 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
363 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
364 powerpc64, sh, sh64, sparc, and sparc64.
365 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
366 * Fixed decoding of netlink messages received within struct msghdr.
367 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
368 argument of sched_getattr syscall being not quite 32-bit.
369 * Fixed corner cases of printing inaccessible times argument of utimes
370 and futimesat syscalls.
372 Noteworthy changes in release 4.16 (2017-02-14)
373 ===============================================
376 * Implemented syscall return value injection (-e inject=SET:retval= option).
377 * Implemented signal injection (-e inject=SET:signal= option).
378 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
379 * Implemented decoding of all SG_* ioctl commands.
380 * Implemented decoding of ustat syscall.
381 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
382 and BPF_PROG_DETACH commands of bpf syscall.
383 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
384 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
386 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
387 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
388 * Updated lists of ioctl commands from Linux 4.10.
389 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
393 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
394 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
395 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
396 and pwritev* syscalls on x32.
397 * Fixed printing of string arguments of getxattr and setxattr syscalls
398 when -s option is used to limit the printed string size.
399 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
401 * Fixed decoding of SG_* and LOOP_* ioctl commands.
402 * Fixed build on mips with musl libc.
403 * Fixed cross-building of ioctlsort.
404 * Applied minor formatting fixes to the manual page.
406 Noteworthy changes in release 4.15 (2016-12-14)
407 ===============================================
409 * Changes in behavior
410 * Time stamps are now printed according to ISO 8601.
411 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
412 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
413 syscalls is now formatted as an array.
416 * Implemented syscall fault injection (-e fault=... option).
417 * Implemented decoding of DM_* ioctl commands.
418 * Implemented decoding of attr parameter of perf_event_open syscall.
419 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
420 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
421 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
423 * Implemented PTRACE_GETREGS API support on m68k.
424 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
425 and V4L2_* constants.
426 * Updated lists of ioctl commands from Linux 4.9.
427 * Added decoding of recently added syscalls on arc, x32, and xtensa.
428 * Enhanced manual page.
431 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
432 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
433 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
434 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
435 setgroups, setns, unshare, and utimes syscalls.
436 * Fixed handling of verbose flag in printing of controls array
437 of struct v4l2_ext_controls.
438 * Fixed omission of field names in the output of capability, sigaction,
439 sigevent, statfs, timespec, timeval, and utimbuf structures.
440 * Fixed printing of unknown syscalls in siginfo structure.
441 * Fixed decoding of ioctl constants on m68k.
442 * Fixed cris architecture support.
443 * Fixed cross build when host compiler does not support the same
444 set of warning flags as the cross compiler.
445 * Fixed build on SLE10 and SLE11.
447 Noteworthy changes in release 4.14 (2016-10-04)
448 ===============================================
450 * Changes in behavior
451 * When using -p option without a command and no processes has been attached,
452 strace exits with exit status 1.
455 * Added printing of the mode argument of open and openat syscalls
456 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
457 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
458 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
459 and aio family syscalls.
460 * Implemented fetching of the 7th subcall argument on mips o32.
461 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
463 * Updated lists of ioctl commands from Linux 4.8.
464 * Added decoding of new syscalls on sh and sh64.
465 * Added RISC-V architecture support.
468 * Marked io_setup and io_destroy as memory mapping related syscalls.
469 * Fixed leakage of placeholder descriptors to tracees.
470 * Fixed printing of mode_t, umode_t, and umask types.
471 * Fixed decoding of iovec arrays without a limit on total data size.
472 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
473 and ipc family syscalls.
474 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
475 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
477 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
478 * Fixed decoding of struct stat64 on sparc64.
479 * Fixed decoding of uid and gid-related syscalls on sparc64.
480 * Fixed decoding of the forth argument of semctl syscall on sparc64.
481 * Fixed values of tty ioctl constants on sparc64.
482 * Fixed sparc personality support on sparc64.
484 Noteworthy changes in release 4.13 (2016-07-26)
485 ===============================================
488 * Implemented a general netlink socket parser.
489 * Enhanced decoding of socket addresses.
490 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
491 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
492 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
493 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
494 and *_MAGIC constants.
495 * Updated lists of ioctl commands from Linux 4.7.
498 * Fixed decoding of pid_t argument of prlimit64 syscall.
499 * Fixed sign extension issues in the parser of struct rusage.
500 * Fixed race condition in decoding of timeout argument of recvmmsg and
501 rt_sigtimedwait syscalls.
502 * Fixed build with fresh linux kernel headers.
504 Noteworthy changes in release 4.12 (2016-05-31)
505 ===============================================
508 * Implemented simultaneous use of -p option and tracing of a command.
509 (addresses Debian bug #549942).
510 * Implemented caching of netlink conversations to reduce amount of time
511 spent in decoding socket details in -yy mode.
512 * Implemented -yy mode decoding of protocol:portid pairs associated with
513 netlink socket descriptors.
514 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
515 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
517 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
518 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
519 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
520 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
521 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
522 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
523 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
524 statfs64, tgkill, waitid, and xattr family syscalls.
525 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
526 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
527 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
528 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
529 * Added decoding of fadvise64 and fadvise64_64 on s390.
530 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
531 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
532 * Updated lists of ioctl commands from Linux 4.6.
535 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
536 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
537 * Fixed decoding of mlock2 syscall on sparc.
538 * Fixed decoding of osf_shmat syscall on alpha.
539 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
540 (addresses Debian bug #485979 and Fedora bug #1298294).
541 * Fixed decoding of preadv syscall in case of short read.
542 * Fixed decoding and dumping of readv syscall in case of short read.
543 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
544 * Fixed decoding of mincore syscall's last argument.
545 * Fixed remaining errors in mapping between syscall numbers and numbers
546 of syscall arguments.
547 * Applied various fixes to strace-graph script.
549 Noteworthy changes in release 4.11 (2015-12-21)
550 ===============================================
552 * Changes in behavior
553 * Some syscalls have different names depending on architecture and
554 personality. In these cases, syscall filtering and printing now
555 consistently uses the names that match corresponding __NR_* kernel
556 macros of the tracee's architecture and personality.
557 * Added strace prefix to all diagnostic messages.
560 * Enhanced and extended test suite.
561 * Implemented reliable tracing of processes whose personality differs
562 from the personality of strace, fixed decoding of 32-bit personality
563 syscalls on 64-bit architectures.
564 * When some data referenced by syscall arguments is irrelevant or cannot
565 be read from tracee's memory, strace now prints its address consistently.
566 * When a syscall is restarted using restart_syscall mechanism, strace now
567 shows the syscall name on architectures that expose this information.
568 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
569 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
570 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
571 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
572 * Optimized decoding of indirect socket syscalls.
573 * Implemented decoding of nanoseconds along with seconds in stat family
574 syscalls (addresses Fedora bug #1251176).
575 * Implemented decoding of struct statfs.f_flags in statfs syscall.
576 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
578 * Implemented decoding of indirect syscall on mips o32.
579 * Implemented decoding of IPPROTO_IP control messages.
580 * Implemented decoding of setsockopt syscall multicast arguments.
581 * Enhanced decoding of struct sigevent.
582 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
583 and v4l2 ioctl syscall arguments.
584 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
585 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
586 sendfile, setsockopt, and shmctl syscalls.
587 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
588 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
589 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
590 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
591 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
592 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
594 * Added Nios II architecture support.
595 * Added new syscall entries to match Linux 4.4.
598 * Fixed potential short read of strings from tracee's memory.
599 * Fixed -qq option in conjunction with -o option.
600 * Fixed filtering of <unavailable> syscalls.
601 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
602 with 64-bit aligned structures.
603 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
604 syscall flags arguments.
605 * Fixed decoding of 4th argument of clock_nanosleep syscall.
606 * Fixed decoding of getpagesize syscall on m68k.
607 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
608 * Fixed decoding of timezone argument of gettimeofday and settimeofday
610 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
612 * Fixed decoding of pipe syscall on alpha and mips.
613 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
614 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
615 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
617 * Fixed decoding of 4th argument of semctl indirect syscall.
618 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
619 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
620 * Fixed decoding of struct dirent on x32.
621 * Fixed decoding of times syscall return value on mips n32 and x32.
622 * Fixed decoding of path argument of umount2 syscall
623 (addresses Debian bug #785050).
624 * Worked around a kernel bug in tracing privileged executables.
625 * Fixed various errors in mapping between syscall numbers and associated
626 information like the number of syscall arguments, the name of syscall,
629 Noteworthy changes in release 4.10 (2015-03-06)
630 ===============================================
633 * Added -yy option to print protocol and address information associated with
635 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
636 recvmsg, sendmmsg, and recvmmsg syscalls.
637 * Implemented full 32-bit decoding of ioctl commands
638 (addresses Debian bug #692913 and Fedora bug #902788).
639 * Implemented PTRACE_GETREGS API support on ia64.
640 * Implemented PTRACE_GETREGS API support on mips.
641 * Implemented PTRACE_GETREGSET API support on s390/s390x.
642 * Implemented decoding of getrandom and seccomp syscalls.
643 * Implemented full decoding of 64-bit capability sets.
644 * Implemented decoding of all prctl commands.
645 * Implemented decoding of parametrized ioctl commands.
646 * Implemented decoding of evdev ioctl commands.
647 * Implemented decoding of v4l ioctl commands.
648 * Implemented decoding of SG_IO v4 ioctl commands.
649 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
650 * Implemented decoding of FALLOC_FL_* fallocate flags.
651 * Implemented decoding of rt_sigreturn signal mask on aarch64,
653 * Enhanced socket decoder to support bluetooth sockets.
654 * Enhanced decoding of unlisted ioctl commands.
655 * Enhanced decoding of getsockopt and setsockopt syscall.
656 * Enhanced decoding of sysinfo syscall.
657 * Enhanced decoding of struct cmsghdr.
658 * Enhanced decoding of wait status.
659 * Enhanced aio support on non-x86 architectures by using external libaio.h.
660 * Added O_TMPFILE to the list of recognized open mode flags.
661 * Updated the list of filesystem type constants that is used in decoding
662 statfs family syscalls.
663 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
665 * Updated lists of signal constants from Linux 3.19.
666 * Updated lists of errno constants from Linux 3.19.
667 * Updated lists of ioctl commands from Linux 3.9.
668 * Added new syscall entries to match Linux 3.19.
671 * Fixed various errors in mapping between syscall numbers and associated
672 information like the number of syscall arguments, the name of syscall,
674 * Fixed quoting issues in printing descriptors, filenames, network interface
675 names, struct utsname members, device/volume names of BLK* ioctl commands.
676 * Fixed uid_t/git_t decoding.
677 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
678 * Fixed potential open flags truncation on some architectures.
679 * Fixed decoding of struct ifreq.ifr_name.
680 * Fixed decoding of SIOCSIFNAME ioctl command.
681 * Fixed decoding of RENAME_* renameat2 flags.
682 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
683 * Fixed decoding of indirect ipc subcalls on some architectures.
684 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
685 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
686 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
687 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
688 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
689 sparc, sparc64, mips, and s390.
690 * Fixed instruction pointer output (-i option) on architectures that support
691 several personalities.
692 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
694 * Fixed build on systems where struct sigaction has no sa_restorer member.
695 * Fixed build with uclibc and musl libc.
698 * Linux kernel >= 2.5.46 is required.
699 Older versions without a decent PTRACE_SETOPTIONS support will not work.
700 * On mips, linux kernel >= 2.6.15 is required.
701 Older versions without a decent PTRACE_GETREGS support will not work.
702 * On s390 and s390x, linux kernel >= 2.6.27 is required.
703 Older versions without a decent PTRACE_GETREGSET support will not work.
705 Noteworthy changes in release 4.9 (2014-08-15)
706 ==============================================
708 * Changes in behavior
709 * Disabled OABI support on ARM EABI systems by default,
710 added --enable-arm-oabi option to enable it at configure time.
713 * Added experimental -k option to print stack trace after each traced syscall.
714 * Added -w option to produce stats on syscall latency.
715 (addresses Debian bug #457497).
716 * Added ARC architecture support.
717 * Added PTRACE_GETREGS API support on PowerPC.
718 * Enhanced Bionic libc and musl libc support.
719 * Enhanced tracing of x86 personality processes on x86_64 and x32.
720 * Enhanced tracing of ARM personality processes on AArch64.
721 * Enhanced 32/64bit personality detection on PowerPC.
722 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
723 renameat2, and request_key syscalls.
724 * Robustified decoding of select, pselect, and io_submit syscalls.
725 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
726 setdomainname, sethostname, setns, and sync_file_range syscalls.
727 * Enhanced decoding of signal bitmasks.
728 * Enhanced decoding of file descriptors.
729 * Enhanced siginfo_t decoding.
730 * Enhanced PF_NETLINK decoding.
731 * Updated CLOCK_* constants
732 (addresses Fedora bug #1088455).
733 * Added new syscall entries to match Linux 3.16.
736 * Added shmat and shmdt to the set of memory mapping related syscalls.
737 * Fixed detaching from stopped processes.
738 * Fixed fanotify_mark decoding on 32bit architectures.
739 * Fixed offset decoding in preadv and pwritev syscalls.
740 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
741 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
742 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
743 (addresses Fedora bug #993384).
744 * Miscellaneous corrections in the manual page.
745 (Addresses Debian bug #725987).
747 Noteworthy changes in release 4.8 (2013-06-03)
748 ==============================================
750 * Changes in behavior
751 * In case of normal strace termination, when the trace output is
752 redirected to a pipe, strace now closes it and waits for the pipe
753 process termination before exit.
756 * Implemented tracing using PTRACE_SEIZE API (when available).
757 * Implemented more reliable PTRACE_GETREGSET-based process personality
758 detection on x86-64 and x32 (when available).
759 * Added -e trace=memory option for tracing memory mapping related syscalls.
760 * Documented -b option.
761 * Allowed exit status messages to be suppressed by giving -q option twice.
762 * Added AArch64 architecture support
763 (addresses Debian bug #693074 and Fedora bug #969858).
764 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
765 * Added tilegx personality support for Tile.
766 * Enhanced support of NOMMU architectures.
767 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
769 * Added new syscall entries to match Linux 3.9.
770 * Regenerated the list of common ioctl names from Linux 3.9.
771 * Updated the list of errno constants.
772 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
773 PTRACE_O_*, and TCP_* constants.
774 * Implemented decoding of UBI ioctls.
775 * Removed redundant "*32" ioctl names.
778 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
779 (addresses Fedora bug #659382).
780 * Fixed kernel release string parsing
781 (addresses Debian bug #702309).
782 * Fixed decoding of *xattr syscalls
783 (addresses Fedora bug #885233).
784 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
785 (addresses Fedora bug #912790).
786 * Fixed tracing forks on SPARC.
787 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
788 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
789 and truncate64 syscalls.
790 * Fixed categories of multiple syscalls on most of supported architectures.
791 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
792 * Fixed decoding of multiple 32-bit personality syscalls on x32.
793 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
794 S390x, and Tile architectures.
795 * Fixed semtimedop decoding on S390x.
796 * Fixed sram_alloc decoding on Blackfin.
797 * Fixed build when process_vm_readv is a stab.
798 * Fixed build with older versions of libaio.h.
800 Noteworthy changes in release 4.7 (2012-05-02)
801 ==============================================
803 * Changes in behavior
804 * strace no longer suspends waitpid until there is a child
805 for waitpid'ing process to collect status from.
806 * strace no longer detaches from a tracee which is supposed
808 * strace now issues a new message: "+++ exited with EXITCODE +++"
809 which shows exact moment strace got exit notification,
810 analogous to existing "+++ killed by SIG +++" message.
813 * Added x32 personality support (x86_64 architecture).
814 * Added -y and -P options to print file descriptor paths and
815 filter by those paths.
816 * Added -I option to control strace interactivity.
817 * Allowed -p option to take comma or whitespace-separated list of PIDs.
818 * Added strace_log_merge script helper to merge timestamped "strace -ff"
820 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
821 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
822 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
823 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
824 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
825 listxattr, setrlimit and swapon syscalls.
826 * Implemented decoding of loop and mtd ioctls.
827 * Added syscall entries for new linux syscalls.
828 * Added syscall entries for direct socket system calls on powerpc.
829 * Updated the list of errno constants.
830 * Updated lists of MSG_*, STA_*, and TCP_* constants.
831 * Regenerated the list of ioctl names from Linux 3.3.
832 * Enhanced switching between processes with different personalities.
833 * Enhanced signals reporting by using short signal names.
834 * Made ERESTART* messages more descriptive.
835 * Made parsing of numbers from strings more robust.
836 * Added support for compat_statfs64 and statfs64.f_flags.
837 * Changed read of data blocks to use single process_vm_readv syscall
838 (when available) instead of several PTRACE_PEEKDATA operations.
839 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
840 operation instead of several PTRACE_PEEKUSER operations.
841 * Applied various optimizations to make strace work faster.
844 * Implemented proper handling of real SIGTRAPs on kernels supporting
845 PTRACE_O_TRACESYSGOOD.
846 (Addresses Fedora bug #162774).
847 * Fixed sockaddr_un.sun_path name in decoded output.
848 (Addresses Debian bug #554946).
849 * Fixed to avoid potential core file clobbering on exit.
850 (Addresses Debian bug #656398).
851 * Fixed a typo in documentation.
852 (Addresses Debian bug #653309).
853 * Fixed decoding of timer id returned by timer_create.
854 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
855 * Fixed *at syscalls flags decoding.
856 * Fixed ARM EABI 64-bit syscall's arguments decoding.
857 * Fixed semtimedop decoding on s390.
858 * Fixed osf_sigprocmask decoding on alpha.
859 * Fixed ipc and socket subcall decoding on several architectures.
860 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
861 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
862 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
863 * Corrected io_* syscall entries on ARM.
864 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
865 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
866 * Fixed build when libaio-devel is not available.
867 * Fixed configure checks for PTRACE_* constants.
868 * Fixed compilation warnings remained on several architectures.
871 * Removed all non-Linux code. After years of neglect, that dead code
872 just hampered further strace development.
873 * Linux kernel >= 2.6.18 is recommended. Older versions might still
874 work but they haven't been thoroughly tested with this release.
876 Noteworthy changes in release 4.6 (2011-03-15)
877 ==============================================
879 * Changes in behavior
880 * Print diagnostic information about changes in personality mode to
881 standard error instead of standard output.
884 * Implemented a new method of following clone, fork, and vfork
885 syscalls using the Linux kernel's explicit facilities for tracing
886 creation of threads and child processes.
887 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
888 * Implemented decoding of TLS syscalls on m68k.
889 * Implemented biarch support on powerpc64.
890 * Implemented biarch support for getrlimit() and setrlimit().
891 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
892 * Implemented SOL_SCTP socket options decoding.
893 * Added HDIO_* ioctl names.
894 (Addresses Debian bug #450953).
895 * Added LOOP_* ioctl names.
896 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
897 to match Linux 2.6.37.
898 * Updated the list of IPPROTO_* constants to match netinet/in.h.
899 * Implemented decoding of HDIO_* and BLK* ioctls.
900 * Added MicroBlaze architecture support.
901 * Added new syscall entries to match Linux 2.6.37.
902 * Regenerated list of ioctl names from Linux 2.6.37.
903 * Enhanced signal notification decoding.
904 * Documented -C and -D options.
907 * Fixed fetching syscall arguments on m68k.
908 * Fixed an error when judging whether a process has children.
909 * Fixed get/set_robust_list syscall numbers for powerpc.
910 * Fixed a corner case in printing clone flags.
911 * Fixed cross-compiling issues.
912 * Fixed build issues on powerpc64, SH and SPARC.
913 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
914 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
915 fanotify_init, and fanotify_mark syscalls.
916 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
917 * Fixed biarch support in IO dumping.
918 * Fixed raw exit_group decoding.
919 * Fixed decoding of file descriptors on 64-bit architectures.
920 * Fixed a corner case in waitpid handling.
921 (Addresses Red Hat bug #663547).
922 * Fixed stat64 decoding on mips
923 (Addresses Debian bug #599028).
924 * Fixed misleading italics in the manual page.
925 (Addresses Debian bug #589323).
927 Noteworthy changes in release 4.5.20 (2010-04-13)
928 =================================================
931 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
932 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
933 rt_tgsigqueueinfo, perf_event_open.
934 * Enhanced decoding of recently added syscalls on non-x86 architectures
935 by replacing a bare decoder with elaborate parsers enabled earlier
937 * Implemented -C option to combine regular and -c output.
938 (Addresses Debian bug #466196)
939 * Enhanced decoding of mbind and mremap syscalls.
940 * Enhanced SOL_PACKET socket options decoding.
941 * Regenerated list of ioctl names from linux 2.6.33.
942 * Added TILE architecture support.
945 * Fixed build with Linux kernel headers 2.6.32-rc5+.
946 (Addresses Debian bug #560516 and Fedora bug #539044)
947 * Fixed build on mips.
948 * Fixed handling of Linux systems without struct statfs64.
949 * Fixed reporting signal mask by sigreturn on powerpc.
950 * Fixed potential stack buffer overflow in select decoder.
951 (Addresses Fedora bug #556678)
952 * Corrected msgsnd indirect ipccall decoding.
953 * Corrected decoding of 64bit syscalls.
954 (Addresses Debian bug #570603)
955 * Corrected getsockopt decoding on architectures where
956 sizeof(long) > sizeof(int).
957 (Addresses Debian bug #494844)
958 * Corrected decoding of epoll_pwait.
959 (Addresses Debian bug #513014)
960 * Corrected handling of killed threads.
962 Noteworthy changes in release 4.5.19 (2009-10-21)
963 =================================================
965 * Changes in behavior
966 * When command exits, strace now exits with the same exit status.
967 If command is terminated by a signal, strace terminates itself
968 with the same signal, so that strace can be used as a wrapper
969 process transparent to the invoking parent process.
970 When using -p option, the exit status of strace is zero unless
971 there was an unexpected error in doing the tracing.
972 (Addresses Fedora bug #105371 and Debian bug #37665)
975 * Implemented decoding of new Linux syscalls: accept4, dup3,
976 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
977 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
978 * Implemented decoding of accept4 socketcall.
979 * Enhanced prctl decoding.
980 * Enhanced nanosleep decoding.
981 * Enhanced ptrace decoding.
982 * Enhanced futex decoding.
983 * Enhanced CAP_* decoding.
984 * Enhanced SIOCS* ioctls decoding.
985 * Enhanced fcntl F_* flags decoding.
986 * Enhanced semop/semtimedop decoding.
987 * Updated ARM architecture support.
988 * Added Blackfin architecture support.
989 * Added AVR32 architecture support.
990 * Added CRIS architecture support.
991 * Made strace detect when traced process suddenly disappeared.
994 * Fixed syscall numbers for tee and sync_file_range.
995 (Addresses Debian bug #503124)
996 * Fixed several bugs in strings decoder, including potential heap
998 (Addresses Fedora bugs #470529, #478324 and #511035)
999 * Marked sendfile(2) as a network syscall.
1000 (Addresses Debian bug #509499)
1001 * Fixed accept(2) decoding.
1002 (Addresses Debian bug #507573)
1003 * Fixed sigtimedwait(2) decoding.
1004 * Fixed build on ARM EABI.
1005 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
1006 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
1007 (Addresses Red Hat bug #471169)
1008 * Fixed display of 32-bit argv array on 64-bit architectures.
1009 (Addresses Fedora bug #519480)
1010 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
1011 * Fixed HPPA architecture support.
1012 (Addresses Debian bugs #437928 and #546619)
1017 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
1018 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
1023 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
1024 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
1025 * Improved output for prctl system call on Linux.
1026 * Improved support for Linux/ARM.
1027 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
1032 * Improved output for delete_module, futex, and mbind system calls on Linux.
1033 * Improved output for SG_IO ioctls on Linux.
1034 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
1035 eventfd, getcpu, epoll_pwait.
1040 * Several biarch improvements.
1041 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
1042 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
1047 * Accept numeric system calls in -e.
1052 * Introduce "-e trace=desc".
1057 * Better x86-64 support for IA32 processes.
1058 * Update PowerPC system calls.
1059 * Better printing for Linux aio system calls.
1063 * Quick fix release for build issues.
1064 * One fix for Linux/ARM system call table.
1069 * Print fault address for SIGSEGV/SIGBUS signals when available.
1074 * Improve socket ioctl printing.
1075 * Update Linux/IA64 syscall list.
1076 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
1077 * Improve mount flags printing.
1078 * Support symbolic printing of x86_64 arch_prctl parameters.
1083 * Update syscall tables for Alpha, ARM, HPPA.
1084 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
1085 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
1086 * Improve ioctl command name matching.
1087 * Print RTC_* ioctl structure contents.
1088 * Support newer RLIMIT_* values.
1089 * Print struct cmsghdr details in sendmsg.
1094 * Print attribute values in *xattr system calls on Linux.
1095 * Include pread and pwrite calls in -e read and -e write tracing.
1096 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
1097 * Print clock_t values symbolically in Linux clock_* system calls.
1101 * Bug fixes, Linux ioctl updates.
1102 * David Miller contributed support for Linux/SPARC64.
1110 * Update Linux ioctl lists.
1111 * Update PF_* and AF_* value lists.
1112 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1117 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1118 * Handle new mq_* system calls in Linux 2.6.6 and later.
1123 * Report some new VM_* bit values on Linux.
1124 * Better output for Linux sched_* system calls.
1129 * Display multiple ioctl name matches on Linux.
1133 * New port to AMD's x86-64 architecture. One strace binary can
1134 handle both new x86-64 and old i386 processes.
1135 * Fixed support for LFS64 calls.
1136 * New switch -E to add/remove environment variables for the command.
1137 * Merged s390/s390x port.
1138 * Trace an unbounded number of processes.
1139 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1140 * Fixed bugs with attach/detach leaving things stopped.
1141 * Fixed traced process seeing ECHILD despite live, traced children
1142 in waitpid calls with WNOHANG.
1143 * Stuart Menefy contributed a port to Linux/SH.
1144 * Stephen Thomas contributed a port to Linux/SH64.
1145 * Many other bug fixes.
1149 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1150 * Fix the ioctl setup for Linux, turned out it did not really work.
1151 Improve the ioctl extractor as well so we decode some more ones.
1155 * compile fixes for Linux/mips
1159 * Linux ia64 and hppa ports added
1160 * The usual Linux syscall updates (includes 32bit uid/gid support),
1161 * Linux ioctl list updated
1162 * Support IPv6 scope ids
1163 * FreeBSD/i386 port added
1164 * UnixWare and Solaris updates
1165 * Better support for tracing multithreaded processes in Linux
1169 * Compiles on glibc2.0 systems again
1170 * Linux/S390 port added
1171 * The usual Linux syscall updates
1172 * we can follow fork on arm now
1176 * Linux/MIPS port added
1177 * Lots of Linux updates again
1178 * Improved IPv6 support
1184 * Compiles on glibc2.0 systems again
1188 * Get stat structure properly on Linux 64bit archs
1189 * Personalities work again
1190 * Compile correctly on SunOS again
1196 * Linux (ultra)sparc fixes
1203 * add support for more Linux architectures (powerpc, sparc, arm)
1204 * support lots more Linux syscalls
1205 * fix signal handling
1206 * add IPX and IPIP support
1207 * check stray syscall after execv
1208 * fix hanging children
1210 Changes in version 3.1
1211 ======================
1213 * Irix5 is supported
1214 * Linux 68k is supported
1215 * Linux alpha is supported
1216 * configure is upgraded to autoconf 2.x
1217 * using -f in combination with -e now works correctly
1218 * output can be piped to a program
1219 * tracing setuid programs works better
1220 * it is now reasonable to install strace setuid to root in some circumstances
1221 * new useful tracing names like file and process to trace whole
1222 classes of system calls, e.g. -efile traces all system calls that
1223 take a file name as an argument
1224 * IPC calls on SunOS 4.1.x are decoded
1225 * Linux program memory is reliably dereferenced
1226 * Linux decodes at least the name of all syscalls as of pre2.0.4
1227 * various cosmetic changes and bug fixes
1229 Changes from versions 2.x to version 3.0
1230 ========================================
1232 * filename arguments are neither abbreviated nor stringified
1233 * string arguments are now true C strings using octal instead of hex by default
1234 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1235 * by default the output for multiple processes now goes into one file
1236 * all structures, vectors, bitsets, etc. use consistent output formats
1237 * the -c option now means count calls, -i does what the old -c used to do
1239 New Features in version 3.0
1240 ===========================
1242 * non-ascii strings can be optionally printed entirely in hex
1243 * the output format is readable when multiple processes are generating output
1244 * exit values are printed in an alignment column
1245 * is is possible to suppress messages about attaching and detaching
1246 * various tracing features can be enabled on a per syscall/signal/desc basis
1247 * selective tracing of syscalls
1248 * selective printing of syscall structures
1249 * selective abbreviation of long structures on a per syscall basis
1250 * selective printing of raw syscall arguments and results
1251 * selective tracing of signals
1252 * selective dumping of all I/O read from file descriptors
1253 * selective dumping of all I/O written to file descriptors
1254 * optional counting of time, calls, and errors for each syscall
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