1 Noteworthy changes in release ?.?? (????-??-??)
2 ===============================================
5 * Updated lists of ioctl commands from Linux 4.19.
7 Noteworthy changes in release 4.24 (2018-08-14)
8 ===============================================
11 * Implemented decoding of kvm vcpu exit reason (-e kvm=vcpu option),
12 requires Linux kernel version 4.16.0 or higher.
13 * Implemented decoding of KVM_SET_CPUID2 and KVM_GET_*_CPUID ioctl commands.
14 * Enhanced decoding of corner cases of SO_LINGER, SO_PEERCRED,
15 and PACKET_STATISTICS getsockopt options.
16 * Wired up io_pgetevents and rseq syscalls on hppa, microblaze, mips, powerpc,
18 * Updated lists of AUDIT_*, BPF_*, IFA_*, IFLA_*, RTA_*, RTPROT_*, TCP_*,
19 TRAP_*, and UDP_* constants.
20 * Updated lists of ioctl commands from Linux 4.18.
23 * Fixed decoding of Q_XGETQSTAT on non-native personalities.
24 * Fixed race condition in aio test.
25 * Fixed build with Bionic libc.
26 * Fixed build with glibc-2.28.
27 * Fixed build in exotic systemd-nspawn based environments.
28 * Fixed build on s390 with kernel headers that do not contain Linux commit
31 Noteworthy changes in release 4.23 (2018-06-14)
32 ===============================================
34 * Changes in behaviour
35 * On x32 personality, 64-bit syscalls (such as readv) are now shown with "#64"
36 suffix instead of "64:" prefix. Unlike the old names, these new names
37 can be used in syscall qualification expressions.
38 * Changed error number output format: error numbers are consistently
39 printed as "-1 ECONST (Error description)"
40 for known errors and as "-1 (errno 123)" for unknown errors,
41 regardless of -e raw qualification settings. One can specify
42 -X raw for displaying raw error numbers unconditionally.
43 * Unfetchable addresses inside arrays are now printed as comments.
44 * Obsolete IA-32 mode syscall names are no longer printed on ia64.
47 * Implemented libdw backend for -k option, configured at build time
48 using --with-libdw option.
49 Whether -k option is compiled is now configured at build time
50 using --enable-stacktrace option.
51 * Added -X option for configuring xlat output formatting (addresses
53 * Added support for personality designation ("64", "32", or "x32") to syscall
54 qualifications in -e trace expressions.
55 * Implemented injection of syscalls with no side effects as an alternative
56 to injection of an invalid syscall (-e inject=SET:syscall= expression).
57 * Improved support for reproducible builds (addresses Debian bug #896016).
58 * Implemented decoding of BPF_PROG_QUERY and BPF_RAW_TRACEPOINT_OPEN bpf
60 * Implemented decoding of INOTIFY_IOC_SETNEXTWD and PERF_EVENT_IOC_* ioctl
62 * Implemented decoding of PR_GET_SPECULATION_CTRL and PR_SET_SPECULATION_CTRL
63 prctl syscall options.
64 * Enhanced decoding of bpf, getsockopt, setsockopt, and socket syscalls.
65 * Enhanced decoding of NETLINK_KOBJECT_UEVENT and NETLINK_ROUTE protocols.
66 * Enhanced decoding of *_DIAG_MEMINFO netlink attributes.
67 * Enhanced decoding of BTRFS_*, FS_IOC_*, SIOCGIFHWADDR, and SIOCSIFHWADDR
69 * Enhanced decoding of AF_BLUETOOTH socket addresses.
70 * Implemented decoding of io_pgetevent syscall.
71 * Wired up rseq syscall.
72 * Updated lists of ADJ_*, BPF_*, BPF_F_*, BPF_PROG_TYPE_*, ETH_P_*, FPE_*,
73 IFF_*, IPPROTO_*, MAP_*, MS_*, MSG_*, NETLINK_*, PACKET_*, PROT_*, SCTP_*,
74 SECCOMP_FILTER_FLAG_*, SEGV_*, SEM_*, SHM_*, SW_*, V4L2_CID_*,
75 V4L2_CTRL_CLASS_*, and V4L2_PIX_FMT_* constants.
76 * Updated lists of ioctl commands from Linux 4.17.
79 * Fixed decoding of msgtyp argument of msgrcv syscall.
80 * Fixed fallback definitions for F_*, MCL_*, MSG_ZEROCOPY, SI_*,
81 and SOL_SOCKET constants.
82 * Fixed -e trace=%pure expression on mips.
84 Noteworthy changes in release 4.22 (2018-04-05)
85 ===============================================
87 * Changes in infrastructure
88 * The mailing list was moved to strace-devel@lists.strace.io.
89 * SourceForge git repository
90 (https://sourceforge.net/p/strace/code/ci/master/tree/) is no longer
91 maintained. Please use GitLab (https://gitlab.com/strace/strace/)
92 or GitHub (https://github.com/strace/strace/) repository instead.
94 * Changes in behaviour
95 * When printing string data, '8' and '9' following an octal escape sequence
96 no longer lead to unabbreviated octal escape sequence output, as they used
98 * Angle brackets are now printed as octal number escape sequences
99 in the output of paths associated with file descriptors.
100 * Data dump for write syscalls (-e write) is performed regardless
101 of successfulness of these syscall (addresses Debian bug #436284).
102 * -r and -t options are now affect output independently. Previously,
103 -r option led to ignoring of the -t option (addresses Debian bug #466195).
106 * Implemented delay injection (-e inject=SET:delay_enter= and
107 -e inject=SET:delay_exit= options).
108 * Added -A option for opening output files in append mode
109 (addresses Debian bug #528488).
110 * IPv6 addresses shown in socket information in -yy mode are now printed
112 * Enhanced decoding of bpf, prctl and ptrace syscalls.
113 * Enhanced decoding of BTRFS_IOC_INO_PATHS, BTRFS_IOC_LOGICAL_INO, and PTP_*
115 * Enhanced NETLINK_ROUTE protocol decoding.
116 * Updated lists of signal codes.
117 * Updated lists of BPF_*, BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
118 SCHED_FLAG_*, SCTP_* and error constants.
119 * Implemented block/character device number printing in -yy mode.
120 * Known pixel/SDR format names are printed as comments for pixelformat fields
122 * Enhanced decoding of kern_features syscall.
123 * Enhanced NETLINK_NETFILTER netlink protocol decoder.
124 * Optimized handling of large number of tracees.
125 * Improved wall clock time measurement in syscall count statistics
127 * Extended the range of allowed values in -e inject=...:retval= expression.
128 * Added i18n support.
129 * Updated lists of ioctl commands from Linux 4.16.
130 * Enhanced manual page.
133 * Fixed build on m68k.
134 * Fixed v4l2 pixelformat decoding on big-endian architectures.
137 Noteworthy changes in release 4.21 (2018-02-13)
138 ===============================================
140 * Changes in behaviour
141 * Warning is now issued when -F option is used.
142 * Warning is now issued when a tracee with unsupported personality
144 * Unknown syscall numbers are now printed in hexadecimal form.
147 * Implemented decoding of netlink descriptor attributes as file descriptors.
148 * Implemented decoding of hugetlb page size selection flags.
149 * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
150 BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
151 and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
152 * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
153 perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
154 s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
156 * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
157 * Implemented decoding of riscv_flush_icache syscall.
158 * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
160 * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
161 * Print values returned by mq_open syscall and first arguments
162 of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
164 * Added decoding of get_tls syscall on arm.
165 * Added -e trace=%pure option for tracing system calls with no arguments that
167 * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
168 SHM_*, and TCP_* constants.
169 * Added manual page for the strace-log-merge command.
170 * Updated lists of ioctl commands from Linux 4.15.
171 * Implemented biarch support for s390x.
172 * Implemented an optional support for symbol demangling in strace -k output
173 (activated by --with-libiberty configure option).
174 * Information about availability of demangling and reliable personality
175 decoding (on architectures with multiple personalities) is now available
177 * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
178 powerpc and powerpc64.
179 * Enhanced manual page.
182 * Fixed multi-personality support in cross builds.
183 * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
184 syscalls to %desc tracing set.
185 * Fixed path tracing support for mmap syscalls with indirect arguments and
186 for old select syscall.
187 * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
188 * Fixed open mode flags decoding.
189 * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
190 * Error counts that exceed one billion are now printed correctly in call
192 * Fixed call summary header for x32 personality.
193 * Changes of tracee personalities are reported more reliably.
194 * Fixed the case when strace attaches to a tracee being inside exec and its
195 first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
196 which messed up all the syscall state tracking.
197 * Fixed printing of higher 32 bits of the return value for x32 personality.
200 * A C compiler that supports "for" loop initial declarations is now required.
201 * Inability to configure multiple personality support on architectures where
202 multiple personalities are supported leads to configuration failure during
203 build now. Use --enable-mpers=check to revert to the old behaviour.
204 * Build-time requirement for the mpers support has been lowered from gawk 4
206 * Removed incomplete and non-functional support for the CRIS architecture.
207 * Removed incomplete and unused support for IA-32 mode on the IA-64
210 Noteworthy changes in release 4.20 (2017-11-13)
211 ===============================================
214 * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
215 * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
217 * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
218 MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
220 * Added decoding of statx syscall on hppa.
221 * Updated lists of ioctl commands from Linux 4.14.
224 * Fixed powerpc personality support on powerpc64.
226 Noteworthy changes in release 4.19 (2017-09-05)
227 ===============================================
229 * Changes in behaviour
230 * Changed formatting of personality names on tile architecture in order
231 to make it in line with other multi-personality architectures.
232 * Changed field output order in struct v4l2_requestbuffers to improve in/out
234 * Changed handling of multiple signal= specifications in an injection
235 expression: multiple specification now leads to error instead of implicit
236 usage the last specification.
239 * Enhanced decoding of optlen argument of getsockopt syscall.
240 * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
241 * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
242 * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
243 IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
244 IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
245 of setsockopt syscall.
246 * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
247 (KDF parameters decoding).
248 * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
249 * Enhanced decoding of UFFDIO_API ioctl command.
250 * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
251 and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
252 * Implemented decoding of linux socket filter programs specified
253 for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
254 * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
255 packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
256 * Implemented NETLINK_SELINUX protocol specific decoding.
257 * Implemented decoding of netlink message ack flags.
258 * Implemented decoding of nlmsgerr netlink attributes.
259 * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
260 * Implemented decoding of crypto_user_alg netlink attributes
262 * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
263 mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
265 * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
266 * Improved handling of unexpected tracees (the ones that cloned with
267 CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
268 are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
269 * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
270 * Added decoding of arch_prctl syscall on x86.
271 * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
272 copy_file_range, preadv2, pwritev2, and statx on alpha.
273 * Added decoding of statx syscall on microblaze.
274 * Added decoding of s390_guarded_storage syscall on s390.
275 * Updated lists of ioctl commands from Linux 4.13.
276 * Enhanced manual page.
279 * Fixed printing of group_req structure on non-native personalities.
280 * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
282 * Fixed formatting of nul-terminated strings which have kernel-imposed size
284 * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
286 * Fixed build warnings on Android mips64.
287 * Fixed unused function "is_negated_errno" build warning when built
289 * Fixed syscall number and arguments retrieval behaviour on sparc64 and
290 mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
291 to use if Linux kernel has commit v4.10-rc1~114^2~2.
292 * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
293 and inotify_init syscalls.
294 * Fixed personality switch printing on sparc64 and risc-v.
296 Noteworthy changes in release 4.18 (2017-07-05)
297 ===============================================
300 * Implemented decoding of SCM_TIMESTAMP* control messages.
301 * Implemented decoding of netlink NLMSG_DONE messages.
302 * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
303 * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
304 NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
305 * Implemented decoding of NETLINK_GENERIC protocol families.
306 * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
307 AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
308 * Implemented basic decoding of netlink attributes.
309 * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
310 AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
311 * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
312 netlink attributes of NETLINK_SOCK_DIAG.
313 * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
314 SO_*, V4L2_*, and prctl ARCH_* constants.
315 * Updated lists of ioctl commands from Linux 4.12.
318 * In interactive mode (-I2), those signals that were blocked at startup
319 will remain blocked for the whole period of strace execution.
320 * strace no longer resets SIGCHLD handler in tracees to the default action.
321 * When traced command is terminated by a blocked signal, strace unblocks
322 that signal to ensure its own termination with the same signal.
323 * Fixed corner cases in decoding of old sigaction syscall.
324 * Fixed build with old kernel headers on mips.
325 * Fixed build on aarch64 and tile with glibc >= 2.26.
326 * Fixed build on arc and nios2.
328 Noteworthy changes in release 4.17 (2017-05-24)
329 ===============================================
331 * Changes in command line syntax
332 * Syscall classes specified in -e trace= option now have % prefix (like
333 -e trace=%process). Old style class names without leading % are still
334 supported, but considered deprecated now.
337 * Optimized syscall filtering.
338 * Improved representation of timestamps.
339 * Enhanced decoding of sched_setattr syscall.
340 * Added -e trace=%stat option for tracing variants of stat syscall.
341 * Added -e trace=%lstat option for tracing variants of lstat syscall.
342 * Added -e trace=%fstat option for tracing variants of fstat and fstatat
344 * Added -e trace=%%stat option for tracing syscalls used for querying file
345 status information (stat, lstat, fstat, fstatat, statx, and their
347 * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
349 * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
351 * Added -e trace=%%statfs option for tracing syscalls used for querying file
352 system statistics information (statfs-like, fstatfs-like and ustat).
353 * Added -e trace=/regex option for filtering syscalls using regular
355 * Added support for prepending of question mark before syscall qualification
356 in -e trace expressions in order to suppress error in case no syscalls
357 matched the provided qualification.
358 * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
359 arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
360 powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
362 * Implemented decoding of statx syscall.
363 * Implemented decoding of NS_* ioctl commands.
364 * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
365 * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
366 * Implemented decoding of NLMSG_ERROR netlink messages.
367 * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
368 * Improved decoding of misplaced parts in DM_* ioctl commands.
369 * Updated lists of ioctl commands from Linux 4.11.
372 * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
373 * Fixed the number of arguments and tracing flags of alpha specific syscalls.
374 * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
375 powerpc64, sh, sh64, sparc, and sparc64.
376 * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
377 * Fixed decoding of netlink messages received within struct msghdr.
378 * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
379 argument of sched_getattr syscall being not quite 32-bit.
380 * Fixed corner cases of printing inaccessible times argument of utimes
381 and futimesat syscalls.
383 Noteworthy changes in release 4.16 (2017-02-14)
384 ===============================================
387 * Implemented syscall return value injection (-e inject=SET:retval= option).
388 * Implemented signal injection (-e inject=SET:signal= option).
389 * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
390 * Implemented decoding of all SG_* ioctl commands.
391 * Implemented decoding of ustat syscall.
392 * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
393 and BPF_PROG_DETACH commands of bpf syscall.
394 * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
395 * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
397 * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
398 * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
399 * Updated lists of ioctl commands from Linux 4.10.
400 * Added decoding of recently added syscalls on avr32, microblaze, ppc,
404 * Fixed pathmatch of oldselect syscall on 64-bit architectures.
405 * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
406 * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
407 and pwritev* syscalls on x32.
408 * Fixed printing of string arguments of getxattr and setxattr syscalls
409 when -s option is used to limit the printed string size.
410 * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
412 * Fixed decoding of SG_* and LOOP_* ioctl commands.
413 * Fixed build on mips with musl libc.
414 * Fixed cross-building of ioctlsort.
415 * Applied minor formatting fixes to the manual page.
417 Noteworthy changes in release 4.15 (2016-12-14)
418 ===============================================
420 * Changes in behavior
421 * Time stamps are now printed according to ISO 8601.
422 * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
423 * The last argument of mincore, sched_getaffinity, and sched_setaffinity
424 syscalls is now formatted as an array.
427 * Implemented syscall fault injection (-e fault=... option).
428 * Implemented decoding of DM_* ioctl commands.
429 * Implemented decoding of attr parameter of perf_event_open syscall.
430 * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
431 * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
432 * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
434 * Implemented PTRACE_GETREGS API support on m68k.
435 * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
436 and V4L2_* constants.
437 * Updated lists of ioctl commands from Linux 4.9.
438 * Added decoding of recently added syscalls on arc, x32, and xtensa.
439 * Enhanced manual page.
442 * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
443 getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
444 mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
445 name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
446 setgroups, setns, unshare, and utimes syscalls.
447 * Fixed handling of verbose flag in printing of controls array
448 of struct v4l2_ext_controls.
449 * Fixed omission of field names in the output of capability, sigaction,
450 sigevent, statfs, timespec, timeval, and utimbuf structures.
451 * Fixed printing of unknown syscalls in siginfo structure.
452 * Fixed decoding of ioctl constants on m68k.
453 * Fixed cris architecture support.
454 * Fixed cross build when host compiler does not support the same
455 set of warning flags as the cross compiler.
456 * Fixed build on SLE10 and SLE11.
458 Noteworthy changes in release 4.14 (2016-10-04)
459 ===============================================
461 * Changes in behavior
462 * When using -p option without a command and no processes has been attached,
463 strace exits with exit status 1.
466 * Added printing of the mode argument of open and openat syscalls
467 when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
468 * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
469 * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
470 and aio family syscalls.
471 * Implemented fetching of the 7th subcall argument on mips o32.
472 * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
474 * Updated lists of ioctl commands from Linux 4.8.
475 * Added decoding of new syscalls on sh and sh64.
476 * Added RISC-V architecture support.
479 * Marked io_setup and io_destroy as memory mapping related syscalls.
480 * Fixed leakage of placeholder descriptors to tracees.
481 * Fixed printing of mode_t, umode_t, and umask types.
482 * Fixed decoding of iovec arrays without a limit on total data size.
483 * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
484 and ipc family syscalls.
485 * Fixed decoding of invalid syscalls mapped to indirect subcalls.
486 * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
488 * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
489 * Fixed decoding of struct stat64 on sparc64.
490 * Fixed decoding of uid and gid-related syscalls on sparc64.
491 * Fixed decoding of the forth argument of semctl syscall on sparc64.
492 * Fixed values of tty ioctl constants on sparc64.
493 * Fixed sparc personality support on sparc64.
495 Noteworthy changes in release 4.13 (2016-07-26)
496 ===============================================
499 * Implemented a general netlink socket parser.
500 * Enhanced decoding of socket addresses.
501 * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
502 * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
503 ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
504 * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
505 and *_MAGIC constants.
506 * Updated lists of ioctl commands from Linux 4.7.
509 * Fixed decoding of pid_t argument of prlimit64 syscall.
510 * Fixed sign extension issues in the parser of struct rusage.
511 * Fixed race condition in decoding of timeout argument of recvmmsg and
512 rt_sigtimedwait syscalls.
513 * Fixed build with fresh linux kernel headers.
515 Noteworthy changes in release 4.12 (2016-05-31)
516 ===============================================
519 * Implemented simultaneous use of -p option and tracing of a command.
520 (addresses Debian bug #549942).
521 * Implemented caching of netlink conversations to reduce amount of time
522 spent in decoding socket details in -yy mode.
523 * Implemented -yy mode decoding of protocol:portid pairs associated with
524 netlink socket descriptors.
525 * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
526 * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
528 * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
529 * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
530 * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
531 getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
532 mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
533 rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
534 sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
535 statfs64, tgkill, waitid, and xattr family syscalls.
536 * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
537 * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
538 * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
539 * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
540 * Added decoding of fadvise64 and fadvise64_64 on s390.
541 * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
542 MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
543 * Updated lists of ioctl commands from Linux 4.6.
546 * Fixed build on arc, metag, nios2, or1k, and tile architectures.
547 * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
548 * Fixed decoding of mlock2 syscall on sparc.
549 * Fixed decoding of osf_shmat syscall on alpha.
550 * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
551 (addresses Debian bug #485979 and Fedora bug #1298294).
552 * Fixed decoding of preadv syscall in case of short read.
553 * Fixed decoding and dumping of readv syscall in case of short read.
554 * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
555 * Fixed decoding of mincore syscall's last argument.
556 * Fixed remaining errors in mapping between syscall numbers and numbers
557 of syscall arguments.
558 * Applied various fixes to strace-graph script.
560 Noteworthy changes in release 4.11 (2015-12-21)
561 ===============================================
563 * Changes in behavior
564 * Some syscalls have different names depending on architecture and
565 personality. In these cases, syscall filtering and printing now
566 consistently uses the names that match corresponding __NR_* kernel
567 macros of the tracee's architecture and personality.
568 * Added strace prefix to all diagnostic messages.
571 * Enhanced and extended test suite.
572 * Implemented reliable tracing of processes whose personality differs
573 from the personality of strace, fixed decoding of 32-bit personality
574 syscalls on 64-bit architectures.
575 * When some data referenced by syscall arguments is irrelevant or cannot
576 be read from tracee's memory, strace now prints its address consistently.
577 * When a syscall is restarted using restart_syscall mechanism, strace now
578 shows the syscall name on architectures that expose this information.
579 * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
580 inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
581 socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
582 F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
583 * Optimized decoding of indirect socket syscalls.
584 * Implemented decoding of nanoseconds along with seconds in stat family
585 syscalls (addresses Fedora bug #1251176).
586 * Implemented decoding of struct statfs.f_flags in statfs syscall.
587 * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
589 * Implemented decoding of indirect syscall on mips o32.
590 * Implemented decoding of IPPROTO_IP control messages.
591 * Implemented decoding of setsockopt syscall multicast arguments.
592 * Enhanced decoding of struct sigevent.
593 * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
594 and v4l2 ioctl syscall arguments.
595 * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
596 getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
597 sendfile, setsockopt, and shmctl syscalls.
598 * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
599 lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
600 open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
601 * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
602 IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
603 PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
605 * Added Nios II architecture support.
606 * Added new syscall entries to match Linux 4.4.
609 * Fixed potential short read of strings from tracee's memory.
610 * Fixed -qq option in conjunction with -o option.
611 * Fixed filtering of <unavailable> syscalls.
612 * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
613 with 64-bit aligned structures.
614 * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
615 syscall flags arguments.
616 * Fixed decoding of 4th argument of clock_nanosleep syscall.
617 * Fixed decoding of getpagesize syscall on m68k.
618 * Fixed decoding of getrandom and seccomp syscalls on aarch64.
619 * Fixed decoding of timezone argument of gettimeofday and settimeofday
621 * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
623 * Fixed decoding of pipe syscall on alpha and mips.
624 * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
625 * Fixed decoding of signal mask argument of pselect6 syscall on x32.
626 * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
628 * Fixed decoding of 4th argument of semctl indirect syscall.
629 * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
630 * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
631 * Fixed decoding of struct dirent on x32.
632 * Fixed decoding of times syscall return value on mips n32 and x32.
633 * Fixed decoding of path argument of umount2 syscall
634 (addresses Debian bug #785050).
635 * Worked around a kernel bug in tracing privileged executables.
636 * Fixed various errors in mapping between syscall numbers and associated
637 information like the number of syscall arguments, the name of syscall,
640 Noteworthy changes in release 4.10 (2015-03-06)
641 ===============================================
644 * Added -yy option to print protocol and address information associated with
646 * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
647 recvmsg, sendmmsg, and recvmmsg syscalls.
648 * Implemented full 32-bit decoding of ioctl commands
649 (addresses Debian bug #692913 and Fedora bug #902788).
650 * Implemented PTRACE_GETREGS API support on ia64.
651 * Implemented PTRACE_GETREGS API support on mips.
652 * Implemented PTRACE_GETREGSET API support on s390/s390x.
653 * Implemented decoding of getrandom and seccomp syscalls.
654 * Implemented full decoding of 64-bit capability sets.
655 * Implemented decoding of all prctl commands.
656 * Implemented decoding of parametrized ioctl commands.
657 * Implemented decoding of evdev ioctl commands.
658 * Implemented decoding of v4l ioctl commands.
659 * Implemented decoding of SG_IO v4 ioctl commands.
660 * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
661 * Implemented decoding of FALLOC_FL_* fallocate flags.
662 * Implemented decoding of rt_sigreturn signal mask on aarch64,
664 * Enhanced socket decoder to support bluetooth sockets.
665 * Enhanced decoding of unlisted ioctl commands.
666 * Enhanced decoding of getsockopt and setsockopt syscall.
667 * Enhanced decoding of sysinfo syscall.
668 * Enhanced decoding of struct cmsghdr.
669 * Enhanced decoding of wait status.
670 * Enhanced aio support on non-x86 architectures by using external libaio.h.
671 * Added O_TMPFILE to the list of recognized open mode flags.
672 * Updated the list of filesystem type constants that is used in decoding
673 statfs family syscalls.
674 * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
676 * Updated lists of signal constants from Linux 3.19.
677 * Updated lists of errno constants from Linux 3.19.
678 * Updated lists of ioctl commands from Linux 3.9.
679 * Added new syscall entries to match Linux 3.19.
682 * Fixed various errors in mapping between syscall numbers and associated
683 information like the number of syscall arguments, the name of syscall,
685 * Fixed quoting issues in printing descriptors, filenames, network interface
686 names, struct utsname members, device/volume names of BLK* ioctl commands.
687 * Fixed uid_t/git_t decoding.
688 * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
689 * Fixed potential open flags truncation on some architectures.
690 * Fixed decoding of struct ifreq.ifr_name.
691 * Fixed decoding of SIOCSIFNAME ioctl command.
692 * Fixed decoding of RENAME_* renameat2 flags.
693 * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
694 * Fixed decoding of indirect ipc subcalls on some architectures.
695 * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
696 * Fixed decoding of 32-bit stat structures on 64-bit architectures.
697 * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
698 * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
699 * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
700 sparc, sparc64, mips, and s390.
701 * Fixed instruction pointer output (-i option) on architectures that support
702 several personalities.
703 * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
705 * Fixed build on systems where struct sigaction has no sa_restorer member.
706 * Fixed build with uclibc and musl libc.
709 * Linux kernel >= 2.5.46 is required.
710 Older versions without a decent PTRACE_SETOPTIONS support will not work.
711 * On mips, linux kernel >= 2.6.15 is required.
712 Older versions without a decent PTRACE_GETREGS support will not work.
713 * On s390 and s390x, linux kernel >= 2.6.27 is required.
714 Older versions without a decent PTRACE_GETREGSET support will not work.
716 Noteworthy changes in release 4.9 (2014-08-15)
717 ==============================================
719 * Changes in behavior
720 * Disabled OABI support on ARM EABI systems by default,
721 added --enable-arm-oabi option to enable it at configure time.
724 * Added experimental -k option to print stack trace after each traced syscall.
725 * Added -w option to produce stats on syscall latency.
726 (addresses Debian bug #457497).
727 * Added ARC architecture support.
728 * Added PTRACE_GETREGS API support on PowerPC.
729 * Enhanced Bionic libc and musl libc support.
730 * Enhanced tracing of x86 personality processes on x86_64 and x32.
731 * Enhanced tracing of ARM personality processes on AArch64.
732 * Enhanced 32/64bit personality detection on PowerPC.
733 * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
734 renameat2, and request_key syscalls.
735 * Robustified decoding of select, pselect, and io_submit syscalls.
736 * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
737 setdomainname, sethostname, setns, and sync_file_range syscalls.
738 * Enhanced decoding of signal bitmasks.
739 * Enhanced decoding of file descriptors.
740 * Enhanced siginfo_t decoding.
741 * Enhanced PF_NETLINK decoding.
742 * Updated CLOCK_* constants
743 (addresses Fedora bug #1088455).
744 * Added new syscall entries to match Linux 3.16.
747 * Added shmat and shmdt to the set of memory mapping related syscalls.
748 * Fixed detaching from stopped processes.
749 * Fixed fanotify_mark decoding on 32bit architectures.
750 * Fixed offset decoding in preadv and pwritev syscalls.
751 * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
752 * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
753 * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
754 (addresses Fedora bug #993384).
755 * Miscellaneous corrections in the manual page.
756 (Addresses Debian bug #725987).
758 Noteworthy changes in release 4.8 (2013-06-03)
759 ==============================================
761 * Changes in behavior
762 * In case of normal strace termination, when the trace output is
763 redirected to a pipe, strace now closes it and waits for the pipe
764 process termination before exit.
767 * Implemented tracing using PTRACE_SEIZE API (when available).
768 * Implemented more reliable PTRACE_GETREGSET-based process personality
769 detection on x86-64 and x32 (when available).
770 * Added -e trace=memory option for tracing memory mapping related syscalls.
771 * Documented -b option.
772 * Allowed exit status messages to be suppressed by giving -q option twice.
773 * Added AArch64 architecture support
774 (addresses Debian bug #693074 and Fedora bug #969858).
775 * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
776 * Added tilegx personality support for Tile.
777 * Enhanced support of NOMMU architectures.
778 * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
780 * Added new syscall entries to match Linux 3.9.
781 * Regenerated the list of common ioctl names from Linux 3.9.
782 * Updated the list of errno constants.
783 * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
784 PTRACE_O_*, and TCP_* constants.
785 * Implemented decoding of UBI ioctls.
786 * Removed redundant "*32" ioctl names.
789 * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
790 (addresses Fedora bug #659382).
791 * Fixed kernel release string parsing
792 (addresses Debian bug #702309).
793 * Fixed decoding of *xattr syscalls
794 (addresses Fedora bug #885233).
795 * Fixed handling of files with 64-bit inode numbers by 32-bit strace
796 (addresses Fedora bug #912790).
797 * Fixed tracing forks on SPARC.
798 * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
799 preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
800 and truncate64 syscalls.
801 * Fixed categories of multiple syscalls on most of supported architectures.
802 * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
803 * Fixed decoding of multiple 32-bit personality syscalls on x32.
804 * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
805 S390x, and Tile architectures.
806 * Fixed semtimedop decoding on S390x.
807 * Fixed sram_alloc decoding on Blackfin.
808 * Fixed build when process_vm_readv is a stab.
809 * Fixed build with older versions of libaio.h.
811 Noteworthy changes in release 4.7 (2012-05-02)
812 ==============================================
814 * Changes in behavior
815 * strace no longer suspends waitpid until there is a child
816 for waitpid'ing process to collect status from.
817 * strace no longer detaches from a tracee which is supposed
819 * strace now issues a new message: "+++ exited with EXITCODE +++"
820 which shows exact moment strace got exit notification,
821 analogous to existing "+++ killed by SIG +++" message.
824 * Added x32 personality support (x86_64 architecture).
825 * Added -y and -P options to print file descriptor paths and
826 filter by those paths.
827 * Added -I option to control strace interactivity.
828 * Allowed -p option to take comma or whitespace-separated list of PIDs.
829 * Added strace_log_merge script helper to merge timestamped "strace -ff"
831 * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
832 preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
833 recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
834 sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
835 * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
836 listxattr, setrlimit and swapon syscalls.
837 * Implemented decoding of loop and mtd ioctls.
838 * Added syscall entries for new linux syscalls.
839 * Added syscall entries for direct socket system calls on powerpc.
840 * Updated the list of errno constants.
841 * Updated lists of MSG_*, STA_*, and TCP_* constants.
842 * Regenerated the list of ioctl names from Linux 3.3.
843 * Enhanced switching between processes with different personalities.
844 * Enhanced signals reporting by using short signal names.
845 * Made ERESTART* messages more descriptive.
846 * Made parsing of numbers from strings more robust.
847 * Added support for compat_statfs64 and statfs64.f_flags.
848 * Changed read of data blocks to use single process_vm_readv syscall
849 (when available) instead of several PTRACE_PEEKDATA operations.
850 * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
851 operation instead of several PTRACE_PEEKUSER operations.
852 * Applied various optimizations to make strace work faster.
855 * Implemented proper handling of real SIGTRAPs on kernels supporting
856 PTRACE_O_TRACESYSGOOD.
857 (Addresses Fedora bug #162774).
858 * Fixed sockaddr_un.sun_path name in decoded output.
859 (Addresses Debian bug #554946).
860 * Fixed to avoid potential core file clobbering on exit.
861 (Addresses Debian bug #656398).
862 * Fixed a typo in documentation.
863 (Addresses Debian bug #653309).
864 * Fixed decoding of timer id returned by timer_create.
865 * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
866 * Fixed *at syscalls flags decoding.
867 * Fixed ARM EABI 64-bit syscall's arguments decoding.
868 * Fixed semtimedop decoding on s390.
869 * Fixed osf_sigprocmask decoding on alpha.
870 * Fixed ipc and socket subcall decoding on several architectures.
871 * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
872 epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
873 sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
874 * Corrected io_* syscall entries on ARM.
875 * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
876 * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
877 * Fixed build when libaio-devel is not available.
878 * Fixed configure checks for PTRACE_* constants.
879 * Fixed compilation warnings remained on several architectures.
882 * Removed all non-Linux code. After years of neglect, that dead code
883 just hampered further strace development.
884 * Linux kernel >= 2.6.18 is recommended. Older versions might still
885 work but they haven't been thoroughly tested with this release.
887 Noteworthy changes in release 4.6 (2011-03-15)
888 ==============================================
890 * Changes in behavior
891 * Print diagnostic information about changes in personality mode to
892 standard error instead of standard output.
895 * Implemented a new method of following clone, fork, and vfork
896 syscalls using the Linux kernel's explicit facilities for tracing
897 creation of threads and child processes.
898 * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
899 * Implemented decoding of TLS syscalls on m68k.
900 * Implemented biarch support on powerpc64.
901 * Implemented biarch support for getrlimit() and setrlimit().
902 * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
903 * Implemented SOL_SCTP socket options decoding.
904 * Added HDIO_* ioctl names.
905 (Addresses Debian bug #450953).
906 * Added LOOP_* ioctl names.
907 * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
908 to match Linux 2.6.37.
909 * Updated the list of IPPROTO_* constants to match netinet/in.h.
910 * Implemented decoding of HDIO_* and BLK* ioctls.
911 * Added MicroBlaze architecture support.
912 * Added new syscall entries to match Linux 2.6.37.
913 * Regenerated list of ioctl names from Linux 2.6.37.
914 * Enhanced signal notification decoding.
915 * Documented -C and -D options.
918 * Fixed fetching syscall arguments on m68k.
919 * Fixed an error when judging whether a process has children.
920 * Fixed get/set_robust_list syscall numbers for powerpc.
921 * Fixed a corner case in printing clone flags.
922 * Fixed cross-compiling issues.
923 * Fixed build issues on powerpc64, SH and SPARC.
924 * Fixed syscall flags of fstatat*, mmap, mmap2, fadvise64*, swapoff,
925 fgetxattr, flistxattr, fremovexattr, epoll_create, fallocate,
926 fanotify_init, and fanotify_mark syscalls.
927 * Fixed decoding of get[ug]id, gete[ug]id and setfs[ug]id return values.
928 * Fixed biarch support in IO dumping.
929 * Fixed raw exit_group decoding.
930 * Fixed decoding of file descriptors on 64-bit architectures.
931 * Fixed a corner case in waitpid handling.
932 (Addresses Red Hat bug #663547).
933 * Fixed stat64 decoding on mips
934 (Addresses Debian bug #599028).
935 * Fixed misleading italics in the manual page.
936 (Addresses Debian bug #589323).
938 Noteworthy changes in release 4.5.20 (2010-04-13)
939 =================================================
942 * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
943 * Implemented basic decoding of new linux syscalls: preadv, pwritev,
944 rt_tgsigqueueinfo, perf_event_open.
945 * Enhanced decoding of recently added syscalls on non-x86 architectures
946 by replacing a bare decoder with elaborate parsers enabled earlier
948 * Implemented -C option to combine regular and -c output.
949 (Addresses Debian bug #466196)
950 * Enhanced decoding of mbind and mremap syscalls.
951 * Enhanced SOL_PACKET socket options decoding.
952 * Regenerated list of ioctl names from linux 2.6.33.
953 * Added TILE architecture support.
956 * Fixed build with Linux kernel headers 2.6.32-rc5+.
957 (Addresses Debian bug #560516 and Fedora bug #539044)
958 * Fixed build on mips.
959 * Fixed handling of Linux systems without struct statfs64.
960 * Fixed reporting signal mask by sigreturn on powerpc.
961 * Fixed potential stack buffer overflow in select decoder.
962 (Addresses Fedora bug #556678)
963 * Corrected msgsnd indirect ipccall decoding.
964 * Corrected decoding of 64bit syscalls.
965 (Addresses Debian bug #570603)
966 * Corrected getsockopt decoding on architectures where
967 sizeof(long) > sizeof(int).
968 (Addresses Debian bug #494844)
969 * Corrected decoding of epoll_pwait.
970 (Addresses Debian bug #513014)
971 * Corrected handling of killed threads.
973 Noteworthy changes in release 4.5.19 (2009-10-21)
974 =================================================
976 * Changes in behavior
977 * When command exits, strace now exits with the same exit status.
978 If command is terminated by a signal, strace terminates itself
979 with the same signal, so that strace can be used as a wrapper
980 process transparent to the invoking parent process.
981 When using -p option, the exit status of strace is zero unless
982 there was an unexpected error in doing the tracing.
983 (Addresses Fedora bug #105371 and Debian bug #37665)
986 * Implemented decoding of new Linux syscalls: accept4, dup3,
987 epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
988 * Implemented decoding of socket type flags introduced in Linux 2.6.27.
989 * Implemented decoding of accept4 socketcall.
990 * Enhanced prctl decoding.
991 * Enhanced nanosleep decoding.
992 * Enhanced ptrace decoding.
993 * Enhanced futex decoding.
994 * Enhanced CAP_* decoding.
995 * Enhanced SIOCS* ioctls decoding.
996 * Enhanced fcntl F_* flags decoding.
997 * Enhanced semop/semtimedop decoding.
998 * Updated ARM architecture support.
999 * Added Blackfin architecture support.
1000 * Added AVR32 architecture support.
1001 * Added CRIS architecture support.
1002 * Made strace detect when traced process suddenly disappeared.
1005 * Fixed syscall numbers for tee and sync_file_range.
1006 (Addresses Debian bug #503124)
1007 * Fixed several bugs in strings decoder, including potential heap
1009 (Addresses Fedora bugs #470529, #478324 and #511035)
1010 * Marked sendfile(2) as a network syscall.
1011 (Addresses Debian bug #509499)
1012 * Fixed accept(2) decoding.
1013 (Addresses Debian bug #507573)
1014 * Fixed sigtimedwait(2) decoding.
1015 * Fixed build on ARM EABI.
1016 (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
1017 * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
1018 (Addresses Red Hat bug #471169)
1019 * Fixed display of 32-bit argv array on 64-bit architectures.
1020 (Addresses Fedora bug #519480)
1021 * Fixed display of 32-bit struct sigaction on 64-bit architectures.
1022 * Fixed HPPA architecture support.
1023 (Addresses Debian bugs #437928 and #546619)
1028 * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
1029 * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
1034 * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
1035 * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
1036 * Improved output for prctl system call on Linux.
1037 * Improved support for Linux/ARM.
1038 * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
1043 * Improved output for delete_module, futex, and mbind system calls on Linux.
1044 * Improved output for SG_IO ioctls on Linux.
1045 * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
1046 eventfd, getcpu, epoll_pwait.
1051 * Several biarch improvements.
1052 * Improved output for adjtimex, sysctl, quotactl, mount, umount.
1053 * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
1058 * Accept numeric system calls in -e.
1063 * Introduce "-e trace=desc".
1068 * Better x86-64 support for IA32 processes.
1069 * Update PowerPC system calls.
1070 * Better printing for Linux aio system calls.
1074 * Quick fix release for build issues.
1075 * One fix for Linux/ARM system call table.
1080 * Print fault address for SIGSEGV/SIGBUS signals when available.
1085 * Improve socket ioctl printing.
1086 * Update Linux/IA64 syscall list.
1087 * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
1088 * Improve mount flags printing.
1089 * Support symbolic printing of x86_64 arch_prctl parameters.
1094 * Update syscall tables for Alpha, ARM, HPPA.
1095 * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
1096 * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
1097 * Improve ioctl command name matching.
1098 * Print RTC_* ioctl structure contents.
1099 * Support newer RLIMIT_* values.
1100 * Print struct cmsghdr details in sendmsg.
1105 * Print attribute values in *xattr system calls on Linux.
1106 * Include pread and pwrite calls in -e read and -e write tracing.
1107 * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
1108 * Print clock_t values symbolically in Linux clock_* system calls.
1112 * Bug fixes, Linux ioctl updates.
1113 * David Miller contributed support for Linux/SPARC64.
1121 * Update Linux ioctl lists.
1122 * Update PF_* and AF_* value lists.
1123 * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
1128 * On Linux using NPTL threads, -p will now attach to all threads in a process.
1129 * Handle new mq_* system calls in Linux 2.6.6 and later.
1134 * Report some new VM_* bit values on Linux.
1135 * Better output for Linux sched_* system calls.
1140 * Display multiple ioctl name matches on Linux.
1144 * New port to AMD's x86-64 architecture. One strace binary can
1145 handle both new x86-64 and old i386 processes.
1146 * Fixed support for LFS64 calls.
1147 * New switch -E to add/remove environment variables for the command.
1148 * Merged s390/s390x port.
1149 * Trace an unbounded number of processes.
1150 * Handle numerous new system calls in Linux 2.5, and new threads semantics.
1151 * Fixed bugs with attach/detach leaving things stopped.
1152 * Fixed traced process seeing ECHILD despite live, traced children
1153 in waitpid calls with WNOHANG.
1154 * Stuart Menefy contributed a port to Linux/SH.
1155 * Stephen Thomas contributed a port to Linux/SH64.
1156 * Many other bug fixes.
1160 * Fix Linux/ia64 support, looks like someone renamed a few things on us
1161 * Fix the ioctl setup for Linux, turned out it did not really work.
1162 Improve the ioctl extractor as well so we decode some more ones.
1166 * compile fixes for Linux/mips
1170 * Linux ia64 and hppa ports added
1171 * The usual Linux syscall updates (includes 32bit uid/gid support),
1172 * Linux ioctl list updated
1173 * Support IPv6 scope ids
1174 * FreeBSD/i386 port added
1175 * UnixWare and Solaris updates
1176 * Better support for tracing multithreaded processes in Linux
1180 * Compiles on glibc2.0 systems again
1181 * Linux/S390 port added
1182 * The usual Linux syscall updates
1183 * we can follow fork on arm now
1187 * Linux/MIPS port added
1188 * Lots of Linux updates again
1189 * Improved IPv6 support
1195 * Compiles on glibc2.0 systems again
1199 * Get stat structure properly on Linux 64bit archs
1200 * Personalities work again
1201 * Compile correctly on SunOS again
1207 * Linux (ultra)sparc fixes
1214 * add support for more Linux architectures (powerpc, sparc, arm)
1215 * support lots more Linux syscalls
1216 * fix signal handling
1217 * add IPX and IPIP support
1218 * check stray syscall after execv
1219 * fix hanging children
1221 Changes in version 3.1
1222 ======================
1224 * Irix5 is supported
1225 * Linux 68k is supported
1226 * Linux alpha is supported
1227 * configure is upgraded to autoconf 2.x
1228 * using -f in combination with -e now works correctly
1229 * output can be piped to a program
1230 * tracing setuid programs works better
1231 * it is now reasonable to install strace setuid to root in some circumstances
1232 * new useful tracing names like file and process to trace whole
1233 classes of system calls, e.g. -efile traces all system calls that
1234 take a file name as an argument
1235 * IPC calls on SunOS 4.1.x are decoded
1236 * Linux program memory is reliably dereferenced
1237 * Linux decodes at least the name of all syscalls as of pre2.0.4
1238 * various cosmetic changes and bug fixes
1240 Changes from versions 2.x to version 3.0
1241 ========================================
1243 * filename arguments are neither abbreviated nor stringified
1244 * string arguments are now true C strings using octal instead of hex by default
1245 * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
1246 * by default the output for multiple processes now goes into one file
1247 * all structures, vectors, bitsets, etc. use consistent output formats
1248 * the -c option now means count calls, -i does what the old -c used to do
1250 New Features in version 3.0
1251 ===========================
1253 * non-ascii strings can be optionally printed entirely in hex
1254 * the output format is readable when multiple processes are generating output
1255 * exit values are printed in an alignment column
1256 * is is possible to suppress messages about attaching and detaching
1257 * various tracing features can be enabled on a per syscall/signal/desc basis
1258 * selective tracing of syscalls
1259 * selective printing of syscall structures
1260 * selective abbreviation of long structures on a per syscall basis
1261 * selective printing of raw syscall arguments and results
1262 * selective tracing of signals
1263 * selective dumping of all I/O read from file descriptors
1264 * selective dumping of all I/O written to file descriptors
1265 * optional counting of time, calls, and errors for each syscall