Mirror of strace – the linux syscall tracer
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  1. Noteworthy changes in release ?.?? (????-??-??)
  2. ===============================================
  3. * Improvements
  4. * Enhanced xlat styles support configured by -X option.
  5. * Enhanced decoding of PTRACE_PEEKUSER and PTRACE_POKEUSER on hppa.
  6. * Wired up kexec_file_load and rseq syscalls on aarch64, arc, metag, nios2,
  7. or1k, riscv, and tile architectures.
  8. * Updated lists of BPF_*, BTRFS_*, FAN_*, IFLA_*, KERN_*, KVM_CAP_*, NDA_*,
  9. NETNSA_*, NT_*, PR_*, REL_*, SECCOMP_*, SCTP_*, UDP_*, V4L2_*, and *_MAGIC
  10. constants.
  11. * Updated lists of ioctl commands from Linux 5.0.
  12. * Bug fixes
  13. * Fixed ordering of sockaddr_in6 fields.
  14. * Fixed strace-k test on alpha.
  15. * Fixed build on mips o32.
  16. * Fixed build on NOMMU architectures.
  17. * Fixed build in --with-libiberty=yes mode.
  18. Noteworthy changes in release 4.26 (2018-12-26)
  19. ===============================================
  20. * License
  21. * The test suite is now provided under the terms of
  22. the GNU General Public License version 2 or later.
  23. * All the rest of strace is now provided under the terms of
  24. the GNU Lesser General Public License version 2.1 or later.
  25. * Changes in behavior
  26. * If strace is interrupted by a signal it handles (currently
  27. one of HUP, INT, QUIT, PIPE, or TERM), strace terminates
  28. itself with this signal.
  29. * Improvements
  30. * Implemented obtainment of system call information using
  31. PTRACE_GET_SYSCALL_INFO ptrace API.
  32. * Implemented decoding of PTRACE_GET_SYSCALL_INFO ptrace request.
  33. * Implemented decoding of BLKGETZONESZ, BLKGETNRZONES, and RND* ioctl
  34. commands.
  35. * Enhanced xlat styles support configured by -X option.
  36. * Enhanced internet address formatting in structureless contexts.
  37. * Enhanced decoding of getsockopt SO_ERROR option.
  38. * Enhanced error diagnostics when the first exec fails.
  39. * Added %net as a short form of %network in syscall specifications.
  40. * Updated lists of ABS_*, BPF_*, FAN_*, IFA_*, IFLA_*, KVM_CAP_*, NETLINK_*,
  41. NTF_*, PR_SPEC_*, REL_*, SOL_*, TCA_*, and V4L2_* constants.
  42. * Updated lists of ioctl commands from Linux 4.20.
  43. * Enhanced manual page.
  44. * Bug fixes
  45. * Fixed "xlat_idx: Unexpected xlat value 0" warnings.
  46. * Fixed sthyi output format on s390.
  47. * Documented -X option in strace -h output.
  48. Noteworthy changes in release 4.25 (2018-10-30)
  49. ===============================================
  50. * Improvements
  51. * Implemented decoding of KVM_CHECK_EXTENSION and NBD_* ioctl commands.
  52. * Implemented decoding of SOL_XDP socket option names.
  53. * Implemented decoding of AF_PACKET protocols in socket syscall.
  54. * Implemented decoding of AF_AX25 and AF_X25 addresses, protocols,
  55. and options.
  56. * Implemented stack trace printing on receiving signals.
  57. * Enhanced xlat styles support configured by -X option.
  58. * Enhanced decoding of IFLA_*, NETCONFA_*, and SMC_DIAG_* netlink attributes.
  59. * Wired up io_pgetevents syscall on arm, sparc, and sparc64.
  60. * Updated lists of AF_*, AUDIT_*, BPF_*, IFLA_*, IN_*, IPSTATS_*,
  61. IPV4_DEVCONF_*, NT_*, SCTP_*, SO_*, SOCK_*, SOL_*, and V4L2_* constants.
  62. * Updated lists of ioctl commands from Linux 4.19.
  63. * Bug fixes
  64. * Fixed decoding of bit sets in evdev ioctl commands.
  65. * Fixed decoding of EVIOCGBIT(0, ...) ioctl commands.
  66. * Fixed test suite for the case when mlockall and unimplemented syscalls
  67. are explicitly disabled by a seccomp filter.
  68. Noteworthy changes in release 4.24 (2018-08-14)
  69. ===============================================
  70. * Improvements
  71. * Implemented decoding of kvm vcpu exit reason (-e kvm=vcpu option),
  72. requires Linux kernel version 4.16.0 or higher.
  73. * Implemented decoding of KVM_SET_CPUID2 and KVM_GET_*_CPUID ioctl commands.
  74. * Enhanced decoding of corner cases of SO_LINGER, SO_PEERCRED,
  75. and PACKET_STATISTICS getsockopt options.
  76. * Wired up io_pgetevents and rseq syscalls on hppa, microblaze, mips, powerpc,
  77. and s390.
  78. * Updated lists of AUDIT_*, BPF_*, IFA_*, IFLA_*, RTA_*, RTPROT_*, TCP_*,
  79. TRAP_*, and UDP_* constants.
  80. * Updated lists of ioctl commands from Linux 4.18.
  81. * Bug fixes
  82. * Fixed decoding of Q_XGETQSTAT on non-native personalities.
  83. * Fixed race condition in aio test.
  84. * Fixed build with Bionic libc.
  85. * Fixed build with glibc-2.28.
  86. * Fixed build in exotic systemd-nspawn based environments.
  87. * Fixed build on s390 with kernel headers that do not contain Linux commit
  88. v3.10-rc1~201^2~11.
  89. Noteworthy changes in release 4.23 (2018-06-14)
  90. ===============================================
  91. * Changes in behaviour
  92. * On x32 personality, 64-bit syscalls (such as readv) are now shown with "#64"
  93. suffix instead of "64:" prefix. Unlike the old names, these new names
  94. can be used in syscall qualification expressions.
  95. * Changed error number output format: error numbers are consistently
  96. printed as "-1 ECONST (Error description)"
  97. for known errors and as "-1 (errno 123)" for unknown errors,
  98. regardless of -e raw qualification settings. One can specify
  99. -X raw for displaying raw error numbers unconditionally.
  100. * Unfetchable addresses inside arrays are now printed as comments.
  101. * Obsolete IA-32 mode syscall names are no longer printed on ia64.
  102. * Improvements
  103. * Implemented libdw backend for -k option, configured at build time
  104. using --with-libdw option.
  105. Whether -k option is compiled is now configured at build time
  106. using --enable-stacktrace option.
  107. * Added -X option for configuring xlat output formatting (addresses
  108. Debian bug #692915).
  109. * Added support for personality designation ("64", "32", or "x32") to syscall
  110. qualifications in -e trace expressions.
  111. * Implemented injection of syscalls with no side effects as an alternative
  112. to injection of an invalid syscall (-e inject=SET:syscall= expression).
  113. * Improved support for reproducible builds (addresses Debian bug #896016).
  114. * Implemented decoding of BPF_PROG_QUERY and BPF_RAW_TRACEPOINT_OPEN bpf
  115. syscall commands.
  116. * Implemented decoding of INOTIFY_IOC_SETNEXTWD and PERF_EVENT_IOC_* ioctl
  117. commands.
  118. * Implemented decoding of PR_GET_SPECULATION_CTRL and PR_SET_SPECULATION_CTRL
  119. prctl syscall options.
  120. * Enhanced decoding of bpf, getsockopt, setsockopt, and socket syscalls.
  121. * Enhanced decoding of NETLINK_KOBJECT_UEVENT and NETLINK_ROUTE protocols.
  122. * Enhanced decoding of *_DIAG_MEMINFO netlink attributes.
  123. * Enhanced decoding of BTRFS_*, FS_IOC_*, SIOCGIFHWADDR, and SIOCSIFHWADDR
  124. ioctl commands.
  125. * Enhanced decoding of AF_BLUETOOTH socket addresses.
  126. * Implemented decoding of io_pgetevent syscall.
  127. * Wired up rseq syscall.
  128. * Updated lists of ADJ_*, BPF_*, BPF_F_*, BPF_PROG_TYPE_*, ETH_P_*, FPE_*,
  129. IFF_*, IPPROTO_*, MAP_*, MS_*, MSG_*, NETLINK_*, PACKET_*, PROT_*, SCTP_*,
  130. SECCOMP_FILTER_FLAG_*, SEGV_*, SEM_*, SHM_*, SW_*, V4L2_CID_*,
  131. V4L2_CTRL_CLASS_*, and V4L2_PIX_FMT_* constants.
  132. * Updated lists of ioctl commands from Linux 4.17.
  133. * Bug fixes
  134. * Fixed decoding of msgtyp argument of msgrcv syscall.
  135. * Fixed fallback definitions for F_*, MCL_*, MSG_ZEROCOPY, SI_*,
  136. and SOL_SOCKET constants.
  137. * Fixed -e trace=%pure expression on mips.
  138. Noteworthy changes in release 4.22 (2018-04-05)
  139. ===============================================
  140. * Changes in infrastructure
  141. * The mailing list was moved to strace-devel@lists.strace.io.
  142. * SourceForge git repository
  143. (https://sourceforge.net/p/strace/code/ci/master/tree/) is no longer
  144. maintained. Please use GitLab (https://gitlab.com/strace/strace/)
  145. or GitHub (https://github.com/strace/strace/) repository instead.
  146. * Changes in behaviour
  147. * When printing string data, '8' and '9' following an octal escape sequence
  148. no longer lead to unabbreviated octal escape sequence output, as they used
  149. to do.
  150. * Angle brackets are now printed as octal number escape sequences
  151. in the output of paths associated with file descriptors.
  152. * Data dump for write syscalls (-e write) is performed regardless
  153. of successfulness of these syscall (addresses Debian bug #436284).
  154. * -r and -t options are now affect output independently. Previously,
  155. -r option led to ignoring of the -t option (addresses Debian bug #466195).
  156. * Improvements
  157. * Implemented delay injection (-e inject=SET:delay_enter= and
  158. -e inject=SET:delay_exit= options).
  159. * Added -A option for opening output files in append mode
  160. (addresses Debian bug #528488).
  161. * IPv6 addresses shown in socket information in -yy mode are now printed
  162. in brackets.
  163. * Enhanced decoding of bpf, prctl and ptrace syscalls.
  164. * Enhanced decoding of BTRFS_IOC_INO_PATHS, BTRFS_IOC_LOGICAL_INO, and PTP_*
  165. ioctl commands.
  166. * Enhanced NETLINK_ROUTE protocol decoding.
  167. * Updated lists of signal codes.
  168. * Updated lists of BPF_*, BTN_*, ETH_P_*, INET_DIAG_BC_*, KEY_*, POLL*, RWF_*,
  169. SCHED_FLAG_*, SCTP_* and error constants.
  170. * Implemented block/character device number printing in -yy mode.
  171. * Known pixel/SDR format names are printed as comments for pixelformat fields
  172. in v4l2 structures.
  173. * Enhanced decoding of kern_features syscall.
  174. * Enhanced NETLINK_NETFILTER netlink protocol decoder.
  175. * Optimized handling of large number of tracees.
  176. * Improved wall clock time measurement in syscall count statistics
  177. (-c -w option).
  178. * Extended the range of allowed values in -e inject=...:retval= expression.
  179. * Added i18n support.
  180. * Updated lists of ioctl commands from Linux 4.16.
  181. * Enhanced manual page.
  182. * Bug fixes
  183. * Fixed build on m68k.
  184. * Fixed v4l2 pixelformat decoding on big-endian architectures.
  185. * Fixed -O option.
  186. Noteworthy changes in release 4.21 (2018-02-13)
  187. ===============================================
  188. * Changes in behaviour
  189. * Warning is now issued when -F option is used.
  190. * Warning is now issued when a tracee with unsupported personality
  191. is attached.
  192. * Unknown syscall numbers are now printed in hexadecimal form.
  193. * Improvements
  194. * Implemented decoding of netlink descriptor attributes as file descriptors.
  195. * Implemented decoding of hugetlb page size selection flags.
  196. * Implemented decoding of BPF_PROG_TEST_RUN, BPF_PROG_GET_NEXT_ID,
  197. BPF_MAP_GET_NEXT_ID, BPF_PROG_GET_FD_BY_ID, BPF_MAP_GET_FD_BY_ID,
  198. and BPF_OBJ_GET_INFO_BY_FD commands of bpf syscall.
  199. * Enhanced decoding of get_thread_area, memfd_create, modify_ldt,
  200. perf_event_open, reboot, s390_guarded_storage, s390_pcio_mmio_read,
  201. s390_pci_mmio_write, s390_runtime_instr, s390_sthyi, set_thread_area,
  202. and shmget syscalls.
  203. * Implemented decoding of KVM_* and DM_LIST_DEVICES ioctl commands.
  204. * Implemented decoding of riscv_flush_icache syscall.
  205. * Enhanced decoding of getsockopt and setsockopt syscalls for SOL_NETLINK
  206. level.
  207. * Enhanced decoding of BPF_MAP_CREATE command of bpf syscall.
  208. * Print values returned by mq_open syscall and first arguments
  209. of mq_getsetattr, mq_notify, mq_timedreceive, and mq_timedsend syscalls
  210. as file descriptors.
  211. * Added decoding of get_tls syscall on arm.
  212. * Added -e trace=%pure option for tracing system calls with no arguments that
  213. never fail.
  214. * Updated lists of IPV6_*, MAP_*, MEMBARRIER_CMD_*, MSG_*, NT_*, PKEY_*,
  215. SHM_*, and TCP_* constants.
  216. * Added manual page for the strace-log-merge command.
  217. * Updated lists of ioctl commands from Linux 4.15.
  218. * Implemented biarch support for s390x.
  219. * Implemented an optional support for symbol demangling in strace -k output
  220. (activated by --with-libiberty configure option).
  221. * Information about availability of demangling and reliable personality
  222. decoding (on architectures with multiple personalities) is now available
  223. in strace -V output.
  224. * Added decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls on
  225. powerpc and powerpc64.
  226. * Enhanced manual page.
  227. * Bug fixes
  228. * Fixed multi-personality support in cross builds.
  229. * Added mq_getsetattr, mq_notify, mq_open, mq_timedreceive, and mq_timedsend
  230. syscalls to %desc tracing set.
  231. * Fixed path tracing support for mmap syscalls with indirect arguments and
  232. for old select syscall.
  233. * Fixed decoding of arm-specific (__ARM_NR_*) syscalls.
  234. * Fixed open mode flags decoding.
  235. * Fixed corner cases in handling of strace -ff -ttt logs by strace-log-merge.
  236. * Error counts that exceed one billion are now printed correctly in call
  237. summary output.
  238. * Fixed call summary header for x32 personality.
  239. * Changes of tracee personalities are reported more reliably.
  240. * Fixed the case when strace attaches to a tracee being inside exec and its
  241. first syscall stop is syscall-exit-stop instead of syscall-enter-stop,
  242. which messed up all the syscall state tracking.
  243. * Fixed printing of higher 32 bits of the return value for x32 personality.
  244. * Portability
  245. * A C compiler that supports "for" loop initial declarations is now required.
  246. * Inability to configure multiple personality support on architectures where
  247. multiple personalities are supported leads to configuration failure during
  248. build now. Use --enable-mpers=check to revert to the old behaviour.
  249. * Build-time requirement for the mpers support has been lowered from gawk 4
  250. to gawk 3.
  251. * Removed incomplete and non-functional support for the CRIS architecture.
  252. * Removed incomplete and unused support for IA-32 mode on the IA-64
  253. architecture.
  254. Noteworthy changes in release 4.20 (2017-11-13)
  255. ===============================================
  256. * Improvements
  257. * Implemented decoding of NETLINK_NETFILTER netlink message types and flags.
  258. * Implemented decoding of SECCOMP_GET_ACTION_AVAIL operation of seccomp
  259. syscall.
  260. * Updated lists of ARPHRD_*, BPF_*, ETH_P_*, LOOP_*, MADV_*,
  261. MEMBARRIER_CMD_*, MFD_*, SECCOMP_*, SO_*, SOL_*, TCP_*, and UFFD_FEATURE_*
  262. constants.
  263. * Added decoding of statx syscall on hppa.
  264. * Updated lists of ioctl commands from Linux 4.14.
  265. * Bug fixes
  266. * Fixed powerpc personality support on powerpc64.
  267. Noteworthy changes in release 4.19 (2017-09-05)
  268. ===============================================
  269. * Changes in behaviour
  270. * Changed formatting of personality names on tile architecture in order
  271. to make it in line with other multi-personality architectures.
  272. * Changed field output order in struct v4l2_requestbuffers to improve in/out
  273. field formatting.
  274. * Changed handling of multiple signal= specifications in an injection
  275. expression: multiple specification now leads to error instead of implicit
  276. usage the last specification.
  277. * Improvements
  278. * Enhanced decoding of optlen argument of getsockopt syscall.
  279. * Enhanced decoding of SO_LINGER option of getsockopt and setsockopt syscalls.
  280. * Enhanced decoding of SO_PEERCRED option of getsockopt syscall.
  281. * Enhanced decoding of IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
  282. IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP, IPV6_JOIN_ANYCAST,
  283. IPV6_LEAVE_ANYCAST, MCAST_JOIN_GROUP, and MCAST_LEAVE_GROUP options
  284. of setsockopt syscall.
  285. * Enhanced decoding of KEYCTL_DH_COMPUTE operation of keyctl syscall
  286. (KDF parameters decoding).
  287. * Implemented decoding of KEYCTL_RESTRICT_KEYRING operation of keyctl syscall.
  288. * Enhanced decoding of UFFDIO_API ioctl command.
  289. * Enhanced decoding of BPF_PROG_LOAD, BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM,
  290. and BPF_MAP_GET_NEXT_KEY commands of bpf syscall.
  291. * Implemented decoding of linux socket filter programs specified
  292. for SO_ATTACH_FILTER and SO_ATTACH_REUSEPORT_CBPF socket options.
  293. * Implemented decoding of inet_diag_req_v2, inet_diag_req_compat,
  294. packet_diag_msg, and smc_diag_msg netlink attributes of NETLINK_SOCK_DIAG.
  295. * Implemented NETLINK_SELINUX protocol specific decoding.
  296. * Implemented decoding of netlink message ack flags.
  297. * Implemented decoding of nlmsgerr netlink attributes.
  298. * Implemented basic protocol specific decoding of NETLINK_CRYPTO.
  299. * Implemented decoding of crypto_user_alg netlink attributes
  300. of NETLINK_CRYPTO.
  301. * Implemented basic protocol specific decoding of addr, addrlabel, dcb, link,
  302. mdb, neigh, neightbl, netconf, nsid, route, rule, tc, and tca messages
  303. of NETLINK_ROUTE.
  304. * Implemented decoding of NETLINK_KOBJECT_UEVENT messages.
  305. * Improved handling of unexpected tracees (the ones that cloned with
  306. CLONE_PARENT/CLONE_PTRACE or called PTRACE_TRACEME on themselves): they
  307. are now PTRACE_DETACH'ed instead of PTRACE_CONT'ed.
  308. * Updated lists of BPF_*, KEY_*, RWF_*, SCM_*, SO_*, and *_MAGIC constants.
  309. * Added decoding of arch_prctl syscall on x86.
  310. * Added decoding of seccomp, bpf, userfaultfd, membarrier, mlock2,
  311. copy_file_range, preadv2, pwritev2, and statx on alpha.
  312. * Added decoding of statx syscall on microblaze.
  313. * Added decoding of s390_guarded_storage syscall on s390.
  314. * Updated lists of ioctl commands from Linux 4.13.
  315. * Enhanced manual page.
  316. * Bug fixes
  317. * Fixed printing of group_req structure on non-native personalities.
  318. * Fixed output formatting of blkpg_ioctl_arg, dm_name_list, and iocb
  319. structures.
  320. * Fixed formatting of nul-terminated strings which have kernel-imposed size
  321. limit.
  322. * Fixed printing of paths that hit PATM_MAX limit in order to match kernel's
  323. behaviour.
  324. * Fixed build warnings on Android mips64.
  325. * Fixed unused function "is_negated_errno" build warning when built
  326. with clang.
  327. * Fixed syscall number and arguments retrieval behaviour on sparc64 and
  328. mips o32 after prctl(PR_SET_DUMPABLE, 0) makes PTRACE_PEEKTEXT impossible
  329. to use if Linux kernel has commit v4.10-rc1~114^2~2.
  330. * Fixed path tracing for execveat, symlink, symlinkat, inotify_add_watch,
  331. and inotify_init syscalls.
  332. * Fixed personality switch printing on sparc64 and risc-v.
  333. Noteworthy changes in release 4.18 (2017-07-05)
  334. ===============================================
  335. * Improvements
  336. * Implemented decoding of SCM_TIMESTAMP* control messages.
  337. * Implemented decoding of netlink NLMSG_DONE messages.
  338. * Implemented decoding of netlink generic nlmsg_type and nlmsg_flags.
  339. * Implemented decoding of NETLINK_AUDIT, NETLINK_NETFILTER, NETLINK_ROUTE,
  340. NETLINK_SELINUX, NETLINK_SOCK_DIAG, and NETLINK_XFRM message types.
  341. * Implemented decoding of NETLINK_GENERIC protocol families.
  342. * Implemented basic protocol specific decoding of AF_INET, AF_INET6,
  343. AF_NETLINK, AF_PACKET, AF_SMC, and AF_UNIX messages of NETLINK_SOCK_DIAG.
  344. * Implemented basic decoding of netlink attributes.
  345. * Implemented basic protocol specific decoding of AF_INET, AF_NETLINK,
  346. AF_PACKET, AF_SMC, and AF_UNIX netlink attributes of NETLINK_SOCK_DIAG.
  347. * Implemented decoding of inet_diag_msg, netlink_diag_msg, and unix_diag_msg
  348. netlink attributes of NETLINK_SOCK_DIAG.
  349. * Updated lists of ARPHRD_*, KEYCTL_*, NDIAG_SHOW_*, RTM_*, SCM_*, SCTP_*,
  350. SO_*, V4L2_*, and prctl ARCH_* constants.
  351. * Updated lists of ioctl commands from Linux 4.12.
  352. * Bug fixes
  353. * In interactive mode (-I2), those signals that were blocked at startup
  354. will remain blocked for the whole period of strace execution.
  355. * strace no longer resets SIGCHLD handler in tracees to the default action.
  356. * When traced command is terminated by a blocked signal, strace unblocks
  357. that signal to ensure its own termination with the same signal.
  358. * Fixed corner cases in decoding of old sigaction syscall.
  359. * Fixed build with old kernel headers on mips.
  360. * Fixed build on aarch64 and tile with glibc >= 2.26.
  361. * Fixed build on arc and nios2.
  362. Noteworthy changes in release 4.17 (2017-05-24)
  363. ===============================================
  364. * Changes in command line syntax
  365. * Syscall classes specified in -e trace= option now have % prefix (like
  366. -e trace=%process). Old style class names without leading % are still
  367. supported, but considered deprecated now.
  368. * Improvements
  369. * Optimized syscall filtering.
  370. * Improved representation of timestamps.
  371. * Enhanced decoding of sched_setattr syscall.
  372. * Added -e trace=%stat option for tracing variants of stat syscall.
  373. * Added -e trace=%lstat option for tracing variants of lstat syscall.
  374. * Added -e trace=%fstat option for tracing variants of fstat and fstatat
  375. syscalls.
  376. * Added -e trace=%%stat option for tracing syscalls used for querying file
  377. status information (stat, lstat, fstat, fstatat, statx, and their
  378. variations).
  379. * Added -e trace=%statfs option for tracing statfs, statfs64 and statvfs
  380. syscalls.
  381. * Added -e trace=%fstatfs option for tracing fstatfs, fstatfs64 and fstatvfs
  382. syscalls.
  383. * Added -e trace=%%statfs option for tracing syscalls used for querying file
  384. system statistics information (statfs-like, fstatfs-like and ustat).
  385. * Added -e trace=/regex option for filtering syscalls using regular
  386. expressions.
  387. * Added support for prepending of question mark before syscall qualification
  388. in -e trace expressions in order to suppress error in case no syscalls
  389. matched the provided qualification.
  390. * Implemented decoding of signal mask in rt_sigreturn syscall on alpha, arc,
  391. arm, avr32, bfin, cris, hppa, m68k, metag, microblaze, mips, nios2, or1k,
  392. powerpc, powerpc64, riscv, sh, sh64, sparc, sparc64, tile, x86, and xtensa
  393. architectures.
  394. * Implemented decoding of statx syscall.
  395. * Implemented decoding of NS_* ioctl commands.
  396. * Implemented decoding of the remaining V4L2_BUF_TYPE_* types.
  397. * Implemented decoding of VIDIOC_[SG]_TUNER ioctl commands.
  398. * Implemented decoding of NLMSG_ERROR netlink messages.
  399. * Improved decoding of BPF_PROG_ATTACH command of bpf syscall.
  400. * Improved decoding of misplaced parts in DM_* ioctl commands.
  401. * Updated lists of ioctl commands from Linux 4.11.
  402. * Bug fixes
  403. * Fixed decoding of flags argument of preadv2 and pwritev2 syscalls on x32.
  404. * Fixed the number of arguments and tracing flags of alpha specific syscalls.
  405. * Fixed decoding of old sigsuspend syscall on alpha, cris, mips, powerpc,
  406. powerpc64, sh, sh64, sparc, and sparc64.
  407. * Fixed decoding of sgetmask and ssetmask syscalls on 64-bit architectures.
  408. * Fixed decoding of netlink messages received within struct msghdr.
  409. * Worked around a bug in miscompiled aarch64 kernels leading to the 3rd
  410. argument of sched_getattr syscall being not quite 32-bit.
  411. * Fixed corner cases of printing inaccessible times argument of utimes
  412. and futimesat syscalls.
  413. Noteworthy changes in release 4.16 (2017-02-14)
  414. ===============================================
  415. * Improvements
  416. * Implemented syscall return value injection (-e inject=SET:retval= option).
  417. * Implemented signal injection (-e inject=SET:signal= option).
  418. * Implemented decoding of SUID_DUMP_* constants in PR_[GS]ET_DUMPABLE.
  419. * Implemented decoding of all SG_* ioctl commands.
  420. * Implemented decoding of ustat syscall.
  421. * Implemented decoding of BPF_OBJ_PIN, BPF_OBJ_GET, BPF_PROG_ATTACH,
  422. and BPF_PROG_DETACH commands of bpf syscall.
  423. * Enhanced decoding of sg_io_hdr and sg_io_v4 structures.
  424. * Enhanced decoding of get_robust_list, getrandom, io_submit, set_robust_list
  425. syscalls.
  426. * Enhanced decoding of entities of kernel long type on x32 and mips n32 ABIs.
  427. * Updated lists of IP_*, IPV6_*, and LOOP_* constants.
  428. * Updated lists of ioctl commands from Linux 4.10.
  429. * Added decoding of recently added syscalls on avr32, microblaze, ppc,
  430. and ppc64.
  431. * Bug fixes
  432. * Fixed pathmatch of oldselect syscall on 64-bit architectures.
  433. * Fixed decoding of mmap2 syscall on s390 when arguments are not available.
  434. * Fixed decoding of kexec_file_load, mprotect, pkey_mprotect, prctl, preadv*,
  435. and pwritev* syscalls on x32.
  436. * Fixed printing of string arguments of getxattr and setxattr syscalls
  437. when -s option is used to limit the printed string size.
  438. * Fixed decoding of ifconf, ifreq, and loop_info structures on non-native
  439. personalities.
  440. * Fixed decoding of SG_* and LOOP_* ioctl commands.
  441. * Fixed build on mips with musl libc.
  442. * Fixed cross-building of ioctlsort.
  443. * Applied minor formatting fixes to the manual page.
  444. Noteworthy changes in release 4.15 (2016-12-14)
  445. ===============================================
  446. * Changes in behavior
  447. * Time stamps are now printed according to ISO 8601.
  448. * Changed output format of val3 parameter of futex FUTEX_WAKE_OP operation.
  449. * The last argument of mincore, sched_getaffinity, and sched_setaffinity
  450. syscalls is now formatted as an array.
  451. * Improvements
  452. * Implemented syscall fault injection (-e fault=... option).
  453. * Implemented decoding of DM_* ioctl commands.
  454. * Implemented decoding of attr parameter of perf_event_open syscall.
  455. * Implemented decoding of pkey_alloc, pkey_free, and pkey_mprotect syscalls.
  456. * Implemented dumping of mq_timedsend and mq_timedreceive syscalls.
  457. * Implemented decoding of PR_SET_FP_MODE and PR_GET_FP_MODE operations
  458. of prctl syscall.
  459. * Implemented PTRACE_GETREGS API support on m68k.
  460. * Updated lists of ARCH_*, BPF_*, BTRFS_*, FALLOC_*, MS_*, *_MAGIC,
  461. and V4L2_* constants.
  462. * Updated lists of ioctl commands from Linux 4.9.
  463. * Added decoding of recently added syscalls on arc, x32, and xtensa.
  464. * Enhanced manual page.
  465. * Bug fixes
  466. * Fixed corner cases in decoding of exit, exit_group, futimesat, getgroups,
  467. getresuid, init_module, inotify_init1, kcmp, kexec_load, lookup_dcookie,
  468. mq_getsetattr, mq_notify, mq_open, mq_timedreceive, mq_timedsend,
  469. name_to_handle_at, prctl, process_vm_readv, process_vm_writev, setfsuid,
  470. setgroups, setns, unshare, and utimes syscalls.
  471. * Fixed handling of verbose flag in printing of controls array
  472. of struct v4l2_ext_controls.
  473. * Fixed omission of field names in the output of capability, sigaction,
  474. sigevent, statfs, timespec, timeval, and utimbuf structures.
  475. * Fixed printing of unknown syscalls in siginfo structure.
  476. * Fixed decoding of ioctl constants on m68k.
  477. * Fixed cris architecture support.
  478. * Fixed cross build when host compiler does not support the same
  479. set of warning flags as the cross compiler.
  480. * Fixed build on SLE10 and SLE11.
  481. Noteworthy changes in release 4.14 (2016-10-04)
  482. ===============================================
  483. * Changes in behavior
  484. * When using -p option without a command and no processes has been attached,
  485. strace exits with exit status 1.
  486. * Improvements
  487. * Added printing of the mode argument of open and openat syscalls
  488. when O_TMPFILE flag is set. (Addresses Fedora bug #1377846).
  489. * Enhanced -e abbrev=set, -e raw=set, and -e verbose=set.
  490. * Enhanced decoding of futex, keyctl, quotactl, timerfd_settime,
  491. and aio family syscalls.
  492. * Implemented fetching of the 7th subcall argument on mips o32.
  493. * Updated lists of BPF_*, ETH_P_*, KEXEC_ARCH_*, SCTP_*, TCP_*, and *_MAGIC
  494. constants.
  495. * Updated lists of ioctl commands from Linux 4.8.
  496. * Added decoding of new syscalls on sh and sh64.
  497. * Added RISC-V architecture support.
  498. * Bug fixes
  499. * Marked io_setup and io_destroy as memory mapping related syscalls.
  500. * Fixed leakage of placeholder descriptors to tracees.
  501. * Fixed printing of mode_t, umode_t, and umask types.
  502. * Fixed decoding of iovec arrays without a limit on total data size.
  503. * Fixed decoding of fadvise64, fallocate, futex, keyctl, quotactl, readahead,
  504. and ipc family syscalls.
  505. * Fixed decoding of invalid syscalls mapped to indirect subcalls.
  506. * Fixed decoding of struct btrfs_ioctl_vol_args_v2 on non-native
  507. personalities.
  508. * Fixed decoding of PTRACE_DETACH on sparc and sparc64.
  509. * Fixed decoding of struct stat64 on sparc64.
  510. * Fixed decoding of uid and gid-related syscalls on sparc64.
  511. * Fixed decoding of the forth argument of semctl syscall on sparc64.
  512. * Fixed values of tty ioctl constants on sparc64.
  513. * Fixed sparc personality support on sparc64.
  514. Noteworthy changes in release 4.13 (2016-07-26)
  515. ===============================================
  516. * Improvements
  517. * Implemented a general netlink socket parser.
  518. * Enhanced decoding of socket addresses.
  519. * Enhanced decoding of cmsghdr, msghdr, and mmsghdr structures.
  520. * Enhanced decoding of accept, accept4, bind, getpeername, getsockname,
  521. ipc, recvfrom, recvmsg, recvmmsg, sendto, sendmmsg, and socketcall syscalls.
  522. * Updated lists of AF_*, BPF_MAP_TYPE_*, KEY_*, KEYCTL_*, RWF_*, SS_*,
  523. and *_MAGIC constants.
  524. * Updated lists of ioctl commands from Linux 4.7.
  525. * Bug fixes
  526. * Fixed decoding of pid_t argument of prlimit64 syscall.
  527. * Fixed sign extension issues in the parser of struct rusage.
  528. * Fixed race condition in decoding of timeout argument of recvmmsg and
  529. rt_sigtimedwait syscalls.
  530. * Fixed build with fresh linux kernel headers.
  531. Noteworthy changes in release 4.12 (2016-05-31)
  532. ===============================================
  533. * Improvements
  534. * Implemented simultaneous use of -p option and tracing of a command.
  535. (addresses Debian bug #549942).
  536. * Implemented caching of netlink conversations to reduce amount of time
  537. spent in decoding socket details in -yy mode.
  538. * Implemented -yy mode decoding of protocol:portid pairs associated with
  539. netlink socket descriptors.
  540. * Implemented decoding of copy_file_range, preadv2, and pwritev2 syscalls.
  541. * Implemented dumping of preadv, preadv2, pwritev, pwritev2, and vmsplice
  542. syscalls.
  543. * Implemented decoding of BTRFS_* and UFFDIO_* ioctl commands.
  544. * Enhanced decoding of BLK*, EVIOC*, RTC_*, and VIDIOC_* ioctl commands.
  545. * Enhanced decoding of fstatfs, fstatfs64, get_mempolicy, getdents,
  546. getdents64, getgroups, getpriority, kill, mbind, migrate_pages, mknod,
  547. mknodat, personality, poll, ppoll, quotactl, rt_sigpending,
  548. rt_sigqueueinfo, rt_sigtimedwait, rt_tgsigqueueinfo, sched_getaffinity,
  549. sched_setaffinity, seccomp, set_mempolicy, setgroups, setpriority, statfs,
  550. statfs64, tgkill, waitid, and xattr family syscalls.
  551. * Enhanced decoding of getxpid, getxuid, and getxgid syscalls on alpha.
  552. * Enhanced decoding of pipe syscall on alpha, ia64, mips, sh, and sparc.
  553. * Added decoding of bind, listen, and setsockopt direct syscalls on sparc.
  554. * Added decoding of osf_statfs64 and osf_fstatfs64 syscalls on alpha.
  555. * Added decoding of fadvise64 and fadvise64_64 on s390.
  556. * Updated lists of AF_*, BPF_MAP_TYPE_*, CLONE_*, EPOLL*, IPV6_*, MADV_*,
  557. MSG_*, PTRACE_*, SEGV_*, SO_*, SOL_*, *_MAGIC, and quotactl constants.
  558. * Updated lists of ioctl commands from Linux 4.6.
  559. * Bug fixes
  560. * Fixed build on arc, metag, nios2, or1k, and tile architectures.
  561. * Fixed decoding of 32-bit times syscall return value on 64-bit architectures.
  562. * Fixed decoding of mlock2 syscall on sparc.
  563. * Fixed decoding of osf_shmat syscall on alpha.
  564. * Fixed decoding of syscalls unknown to the kernel on s390/s390x.
  565. (addresses Debian bug #485979 and Fedora bug #1298294).
  566. * Fixed decoding of preadv syscall in case of short read.
  567. * Fixed decoding and dumping of readv syscall in case of short read.
  568. * Fixed dumping of recvmsg and recvmmsg syscalls in case of short read.
  569. * Fixed decoding of mincore syscall's last argument.
  570. * Fixed remaining errors in mapping between syscall numbers and numbers
  571. of syscall arguments.
  572. * Applied various fixes to strace-graph script.
  573. Noteworthy changes in release 4.11 (2015-12-21)
  574. ===============================================
  575. * Changes in behavior
  576. * Some syscalls have different names depending on architecture and
  577. personality. In these cases, syscall filtering and printing now
  578. consistently uses the names that match corresponding __NR_* kernel
  579. macros of the tracee's architecture and personality.
  580. * Added strace prefix to all diagnostic messages.
  581. * Improvements
  582. * Enhanced and extended test suite.
  583. * Implemented reliable tracing of processes whose personality differs
  584. from the personality of strace, fixed decoding of 32-bit personality
  585. syscalls on 64-bit architectures.
  586. * When some data referenced by syscall arguments is irrelevant or cannot
  587. be read from tracee's memory, strace now prints its address consistently.
  588. * When a syscall is restarted using restart_syscall mechanism, strace now
  589. shows the syscall name on architectures that expose this information.
  590. * Print values returned by epoll_create1, eventfd, eventfd2, fanotify_init,
  591. inotify_init1, perf_event_open, pipe, pipe2, signalfd, signalfd4, socket,
  592. socketpair, timerfd, and timerfd_create syscalls, as well as F_DUPFD and
  593. F_DUPFD_CLOEXEC fcntl commands, as file descriptors.
  594. * Optimized decoding of indirect socket syscalls.
  595. * Implemented decoding of nanoseconds along with seconds in stat family
  596. syscalls (addresses Fedora bug #1251176).
  597. * Implemented decoding of struct statfs.f_flags in statfs syscall.
  598. * Implemented decoding of siginfo_t.si_syscall and siginfo_t.si_arch
  599. in SIGSYS signal.
  600. * Implemented decoding of indirect syscall on mips o32.
  601. * Implemented decoding of IPPROTO_IP control messages.
  602. * Implemented decoding of setsockopt syscall multicast arguments.
  603. * Enhanced decoding of struct sigevent.
  604. * Enhanced decoding of block, loop, mtd, ptp, rtc, SG_IO, socket, tty,
  605. and v4l2 ioctl syscall arguments.
  606. * Enhanced decoding of epoll_create, fcntl, fcntl64, futex, getdents,
  607. getdents64, getsockopt, io_*, mount, msgctl, prctl, quotactl, recvfrom,
  608. sendfile, setsockopt, and shmctl syscalls.
  609. * Implemented decoding of bpf, execveat, ioperm, iopl, kcmp, kexec_file_load,
  610. lookup_dcookie, membarrier, memfd_create, mlock2, name_to_handle_at,
  611. open_by_handle_at, sched_getattr, sched_setattr, and userfaultfd syscalls.
  612. * Updated lists of AF_*, EPOLL_*, FALLOC_FL_*, F_*, INPUT_PROP_*, IPPROTO_*,
  613. IPV6_*, IP_*, KEY_*, LOCK_*, MNT_*, MS_*, PACKET_*, PERF_FLAG_*, PF_*,
  614. PR_*, PTRACE_O_*, RENAME_*, SCTP_*, SECBIT_*, SO_*, TCP_*, and siginfo_t
  615. constants.
  616. * Added Nios II architecture support.
  617. * Added new syscall entries to match Linux 4.4.
  618. * Bug fixes
  619. * Fixed potential short read of strings from tracee's memory.
  620. * Fixed -qq option in conjunction with -o option.
  621. * Fixed filtering of <unavailable> syscalls.
  622. * Fixed decoding of ioctl syscall command on aarch64 and 32-bit architectures
  623. with 64-bit aligned structures.
  624. * Fixed decoding of eventfd2, epoll_create1, signalfd4, and sync_file_range2
  625. syscall flags arguments.
  626. * Fixed decoding of 4th argument of clock_nanosleep syscall.
  627. * Fixed decoding of getpagesize syscall on m68k.
  628. * Fixed decoding of getrandom and seccomp syscalls on aarch64.
  629. * Fixed decoding of timezone argument of gettimeofday and settimeofday
  630. * syscalls.
  631. * Fixed decoding of offset argument of mmap2 syscall on arm, sparc,
  632. and sparc64.
  633. * Fixed decoding of pipe syscall on alpha and mips.
  634. * Fixed decoding of pipe2 syscall on ia64, sh, sparc, and sparc64.
  635. * Fixed decoding of signal mask argument of pselect6 syscall on x32.
  636. * Fixed decoding of signal mask of rt_sigreturn syscall on aarch64, m68k,
  637. and x32.
  638. * Fixed decoding of 4th argument of semctl indirect syscall.
  639. * Fixed decoding of sa_restorer and sa_mask of sigaction syscall on m68k.
  640. * Fixed decoding of statfs64 and fstatfs64 syscalls on arm eabi.
  641. * Fixed decoding of struct dirent on x32.
  642. * Fixed decoding of times syscall return value on mips n32 and x32.
  643. * Fixed decoding of path argument of umount2 syscall
  644. (addresses Debian bug #785050).
  645. * Worked around a kernel bug in tracing privileged executables.
  646. * Fixed various errors in mapping between syscall numbers and associated
  647. information like the number of syscall arguments, the name of syscall,
  648. and syscall decoder.
  649. Noteworthy changes in release 4.10 (2015-03-06)
  650. ===============================================
  651. * Improvements
  652. * Added -yy option to print protocol and address information associated with
  653. socket descriptors.
  654. * Extended "-e read=set" and "-e write=set" options to cover sendmsg,
  655. recvmsg, sendmmsg, and recvmmsg syscalls.
  656. * Implemented full 32-bit decoding of ioctl commands
  657. (addresses Debian bug #692913 and Fedora bug #902788).
  658. * Implemented PTRACE_GETREGS API support on ia64.
  659. * Implemented PTRACE_GETREGS API support on mips.
  660. * Implemented PTRACE_GETREGSET API support on s390/s390x.
  661. * Implemented decoding of getrandom and seccomp syscalls.
  662. * Implemented full decoding of 64-bit capability sets.
  663. * Implemented decoding of all prctl commands.
  664. * Implemented decoding of parametrized ioctl commands.
  665. * Implemented decoding of evdev ioctl commands.
  666. * Implemented decoding of v4l ioctl commands.
  667. * Implemented decoding of SG_IO v4 ioctl commands.
  668. * Implemented decoding of FIFREEZE/FITHAW/FITRIM ioctl commands.
  669. * Implemented decoding of FALLOC_FL_* fallocate flags.
  670. * Implemented decoding of rt_sigreturn signal mask on aarch64,
  671. x32, and x86_64.
  672. * Enhanced socket decoder to support bluetooth sockets.
  673. * Enhanced decoding of unlisted ioctl commands.
  674. * Enhanced decoding of getsockopt and setsockopt syscall.
  675. * Enhanced decoding of sysinfo syscall.
  676. * Enhanced decoding of struct cmsghdr.
  677. * Enhanced decoding of wait status.
  678. * Enhanced aio support on non-x86 architectures by using external libaio.h.
  679. * Added O_TMPFILE to the list of recognized open mode flags.
  680. * Updated the list of filesystem type constants that is used in decoding
  681. statfs family syscalls.
  682. * Updated lists of CAP_*, PR_*, PTRACE_*, SCHED_*, SO_*, SOL_*, SWAP_FLAG_*,
  683. and TFD_* constants.
  684. * Updated lists of signal constants from Linux 3.19.
  685. * Updated lists of errno constants from Linux 3.19.
  686. * Updated lists of ioctl commands from Linux 3.9.
  687. * Added new syscall entries to match Linux 3.19.
  688. * Bug fixes
  689. * Fixed various errors in mapping between syscall numbers and associated
  690. information like the number of syscall arguments, the name of syscall,
  691. and syscall decoder.
  692. * Fixed quoting issues in printing descriptors, filenames, network interface
  693. names, struct utsname members, device/volume names of BLK* ioctl commands.
  694. * Fixed uid_t/git_t decoding.
  695. * Fixed potential out-of-bounds read issues in getdents/getdents64 decoders.
  696. * Fixed potential open flags truncation on some architectures.
  697. * Fixed decoding of struct ifreq.ifr_name.
  698. * Fixed decoding of SIOCSIFNAME ioctl command.
  699. * Fixed decoding of RENAME_* renameat2 flags.
  700. * Fixed decoding of UTIME_NOW/UTIME_OMIT timeval structures.
  701. * Fixed decoding of indirect ipc subcalls on some architectures.
  702. * Fixed decoding of fanotify_mark syscall on 32-bit architectures.
  703. * Fixed decoding of 32-bit stat structures on 64-bit architectures.
  704. * Fixed decoding of 32-bit struct cmsghdr on 64-bit architectures.
  705. * Fixed decoding of 32-bit preadv/pwritev offset on 64-bit architectures.
  706. * Fixed decoding of sigreturn/rt_sigreturn signal mask on ia64, ppc, ppc64,
  707. sparc, sparc64, mips, and s390.
  708. * Fixed instruction pointer output (-i option) on architectures that support
  709. several personalities.
  710. * Fixed behaviour of "-e read=set" and "-e write=set" when read and write
  711. sets intersect.
  712. * Fixed build on systems where struct sigaction has no sa_restorer member.
  713. * Fixed build with uclibc and musl libc.
  714. * Portability
  715. * Linux kernel >= 2.5.46 is required.
  716. Older versions without a decent PTRACE_SETOPTIONS support will not work.
  717. * On mips, linux kernel >= 2.6.15 is required.
  718. Older versions without a decent PTRACE_GETREGS support will not work.
  719. * On s390 and s390x, linux kernel >= 2.6.27 is required.
  720. Older versions without a decent PTRACE_GETREGSET support will not work.
  721. Noteworthy changes in release 4.9 (2014-08-15)
  722. ==============================================
  723. * Changes in behavior
  724. * Disabled OABI support on ARM EABI systems by default,
  725. added --enable-arm-oabi option to enable it at configure time.
  726. * Improvements
  727. * Added experimental -k option to print stack trace after each traced syscall.
  728. * Added -w option to produce stats on syscall latency.
  729. (addresses Debian bug #457497).
  730. * Added ARC architecture support.
  731. * Added PTRACE_GETREGS API support on PowerPC.
  732. * Enhanced Bionic libc and musl libc support.
  733. * Enhanced tracing of x86 personality processes on x86_64 and x32.
  734. * Enhanced tracing of ARM personality processes on AArch64.
  735. * Enhanced 32/64bit personality detection on PowerPC.
  736. * Implemented decoding of add_key, ioprio_get, ioprio_set, kexec_load, keyctl,
  737. renameat2, and request_key syscalls.
  738. * Robustified decoding of select, pselect, and io_submit syscalls.
  739. * Enhanced decoding of delete_module, fanotify_init, fanotify_mark, fcntl,
  740. setdomainname, sethostname, setns, and sync_file_range syscalls.
  741. * Enhanced decoding of signal bitmasks.
  742. * Enhanced decoding of file descriptors.
  743. * Enhanced siginfo_t decoding.
  744. * Enhanced PF_NETLINK decoding.
  745. * Updated CLOCK_* constants
  746. (addresses Fedora bug #1088455).
  747. * Added new syscall entries to match Linux 3.16.
  748. * Bug fixes
  749. * Added shmat and shmdt to the set of memory mapping related syscalls.
  750. * Fixed detaching from stopped processes.
  751. * Fixed fanotify_mark decoding on 32bit architectures.
  752. * Fixed offset decoding in preadv and pwritev syscalls.
  753. * Fixed select decoding for glibc in _FORTIFY_SOURCE mode.
  754. * Fixed decoding of epoll_ctl syscall with EPOLL_CTL_DEL argument.
  755. * Fixed build when <sys/ptrace.h> and <linux/ptrace.h> conflict
  756. (addresses Fedora bug #993384).
  757. * Miscellaneous corrections in the manual page.
  758. (Addresses Debian bug #725987).
  759. Noteworthy changes in release 4.8 (2013-06-03)
  760. ==============================================
  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.
  765. * Improvements
  766. * Implemented tracing using PTRACE_SEIZE API (when available).
  767. * Implemented more reliable PTRACE_GETREGSET-based process personality
  768. detection on x86-64 and x32 (when available).
  769. * Added -e trace=memory option for tracing memory mapping related syscalls.
  770. * Documented -b option.
  771. * Allowed exit status messages to be suppressed by giving -q option twice.
  772. * Added AArch64 architecture support
  773. (addresses Debian bug #693074 and Fedora bug #969858).
  774. * Added support for OpenRISC 1000, Meta, and Xtensa architectures.
  775. * Added tilegx personality support for Tile.
  776. * Enhanced support of NOMMU architectures.
  777. * Enhanced decoding of getdents, mmap, perf_event_open, ptrace, and
  778. quotactl syscalls.
  779. * Added new syscall entries to match Linux 3.9.
  780. * Regenerated the list of common ioctl names from Linux 3.9.
  781. * Updated the list of errno constants.
  782. * Updated lists of AF_*, MADV_*, MAP_*, MSG_*, MS_*, PF_*, PR_*,
  783. PTRACE_O_*, and TCP_* constants.
  784. * Implemented decoding of UBI ioctls.
  785. * Removed redundant "*32" ioctl names.
  786. * Bug fixes
  787. * Fixed ERESTARTNOINTR leaking to userspace on ancient kernels
  788. (addresses Fedora bug #659382).
  789. * Fixed kernel release string parsing
  790. (addresses Debian bug #702309).
  791. * Fixed decoding of *xattr syscalls
  792. (addresses Fedora bug #885233).
  793. * Fixed handling of files with 64-bit inode numbers by 32-bit strace
  794. (addresses Fedora bug #912790).
  795. * Fixed tracing forks on SPARC.
  796. * Fixed decoding of fadvise64, fallocate, ftruncate64, io_submit, pread,
  797. preadv, pwrite, pwritev, readahead, sigaltstack, sync_file_range, sysctl,
  798. and truncate64 syscalls.
  799. * Fixed categories of multiple syscalls on most of supported architectures.
  800. * Fixed decoding of non-native 32-bit personality recv[m]msg syscalls.
  801. * Fixed decoding of multiple 32-bit personality syscalls on x32.
  802. * Fixed decoding of long long syscall arguments on ARM, MIPS/o32, PowerPC,
  803. S390x, and Tile architectures.
  804. * Fixed semtimedop decoding on S390x.
  805. * Fixed sram_alloc decoding on Blackfin.
  806. * Fixed build when process_vm_readv is a stab.
  807. * Fixed build with older versions of libaio.h.
  808. Noteworthy changes in release 4.7 (2012-05-02)
  809. ==============================================
  810. * Changes in behavior
  811. * strace no longer suspends waitpid until there is a child
  812. for waitpid'ing process to collect status from.
  813. * strace no longer detaches from a tracee which is supposed
  814. to be going to die.
  815. * strace now issues a new message: "+++ exited with EXITCODE +++"
  816. which shows exact moment strace got exit notification,
  817. analogous to existing "+++ killed by SIG +++" message.
  818. * Improvements
  819. * Added x32 personality support (x86_64 architecture).
  820. * Added -y and -P options to print file descriptor paths and
  821. filter by those paths.
  822. * Added -I option to control strace interactivity.
  823. * Allowed -p option to take comma or whitespace-separated list of PIDs.
  824. * Added strace_log_merge script helper to merge timestamped "strace -ff"
  825. log files.
  826. * Implemented decoding of clock_adjtime, get_robust_list, migrate_pages,
  827. preadv, prlimit64, process_vm_readv, process_vm_writev, pwritev,
  828. recvmmsg, recvmsg, rt_tgsigqueueinfo, sendmmsg, setns, set_robust_list,
  829. sched_rr_get_interval, splice, syslog, tee and vmsplice syscalls.
  830. * Enhanced decoding of capget, capset, getrlimit, flistxattr, io_submit,
  831. listxattr, setrlimit and swapon syscalls.
  832. * Implemented decoding of loop and mtd ioctls.
  833. * Added syscall entries for new linux syscalls.
  834. * Added syscall entries for direct socket system calls on powerpc.
  835. * Updated the list of errno constants.
  836. * Updated lists of MSG_*, STA_*, and TCP_* constants.
  837. * Regenerated the list of ioctl names from Linux 3.3.
  838. * Enhanced switching between processes with different personalities.
  839. * Enhanced signals reporting by using short signal names.
  840. * Made ERESTART* messages more descriptive.
  841. * Made parsing of numbers from strings more robust.
  842. * Added support for compat_statfs64 and statfs64.f_flags.
  843. * Changed read of data blocks to use single process_vm_readv syscall
  844. (when available) instead of several PTRACE_PEEKDATA operations.
  845. * Changed read of registers on x86 and x86-64 to use single PTRACE_GETREGS
  846. operation instead of several PTRACE_PEEKUSER operations.
  847. * Applied various optimizations to make strace work faster.
  848. * Bug fixes
  849. * Implemented proper handling of real SIGTRAPs on kernels supporting
  850. PTRACE_O_TRACESYSGOOD.
  851. (Addresses Fedora bug #162774).
  852. * Fixed sockaddr_un.sun_path name in decoded output.
  853. (Addresses Debian bug #554946).
  854. * Fixed to avoid potential core file clobbering on exit.
  855. (Addresses Debian bug #656398).
  856. * Fixed a typo in documentation.
  857. (Addresses Debian bug #653309).
  858. * Fixed decoding of timer id returned by timer_create.
  859. * Fixed epoll_create1, epoll_wait and epoll_pwait decoding.
  860. * Fixed *at syscalls flags decoding.
  861. * Fixed ARM EABI 64-bit syscall's arguments decoding.
  862. * Fixed semtimedop decoding on s390.
  863. * Fixed osf_sigprocmask decoding on alpha.
  864. * Fixed ipc and socket subcall decoding on several architectures.
  865. * Corrected syscall entries for epoll_pwait, epoll_create, epoll_ctl,
  866. epoll_wait, mincore, mlockall, prctl, reboot, sendfile, sendfile64,
  867. sendmsg, sgetmask, ssetmask, swapon, tgkill and tkill syscalls.
  868. * Corrected io_* syscall entries on ARM.
  869. * Fixed PID prefix printing in "strace -oLOG -ff -p1 -p2 -p3" case.
  870. * Fixed logging of unfinished lines in "strace -oLOG -ff" case.
  871. * Fixed build when libaio-devel is not available.
  872. * Fixed configure checks for PTRACE_* constants.
  873. * Fixed compilation warnings remained on several architectures.
  874. * Portability
  875. * Removed all non-Linux code. After years of neglect, that dead code
  876. just hampered further strace development.
  877. * Linux kernel >= 2.6.18 is recommended. Older versions might still
  878. work but they haven't been thoroughly tested with this release.
  879. Noteworthy changes in release 4.6 (2011-03-15)
  880. ==============================================
  881. * Changes in behavior
  882. * Print diagnostic information about changes in personality mode to
  883. standard error instead of standard output.
  884. * Improvements
  885. * Implemented a new method of following clone, fork, and vfork
  886. syscalls using the Linux kernel's explicit facilities for tracing
  887. creation of threads and child processes.
  888. * Implemented CLONE_PARENT and CLONE_UNTRACED flags handling.
  889. * Implemented decoding of TLS syscalls on m68k.
  890. * Implemented biarch support on powerpc64.
  891. * Implemented biarch support for getrlimit() and setrlimit().
  892. * Implemented decoding of struct ucred in getsockopt SO_PEERCRED.
  893. * Implemented SOL_SCTP socket options decoding.
  894. * Added HDIO_* ioctl names.
  895. (Addresses Debian bug #450953).
  896. * Added LOOP_* ioctl names.
  897. * Updated lists of CLOCK_*, CLONE_*, MS_*, and SOL_* constants
  898. to match Linux 2.6.37.
  899. * Updated the list of IPPROTO_* constants to match netinet/in.h.
  900. * Implemented decoding of HDIO_* and BLK* ioctls.
  901. * Added MicroBlaze architecture support.
  902. * Added new syscall entries to match Linux 2.6.37.
  903. * Regenerated list of ioctl names from Linux 2.6.37.
  904. * Enhanced signal notification decoding.
  905. * Documented -C and -D options.
  906. * Bug fixes
  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).
  926. Noteworthy changes in release 4.5.20 (2010-04-13)
  927. =================================================
  928. * Improvements
  929. * Implemented decoding of new linux syscalls: inotify_init1, recvmmsg.
  930. * Implemented basic decoding of new linux syscalls: preadv, pwritev,
  931. rt_tgsigqueueinfo, perf_event_open.
  932. * Enhanced decoding of recently added syscalls on non-x86 architectures
  933. by replacing a bare decoder with elaborate parsers enabled earlier
  934. for x86/x86-64.
  935. * Implemented -C option to combine regular and -c output.
  936. (Addresses Debian bug #466196)
  937. * Enhanced decoding of mbind and mremap syscalls.
  938. * Enhanced SOL_PACKET socket options decoding.
  939. * Regenerated list of ioctl names from linux 2.6.33.
  940. * Added TILE architecture support.
  941. * Bug fixes
  942. * Fixed build with Linux kernel headers 2.6.32-rc5+.
  943. (Addresses Debian bug #560516 and Fedora bug #539044)
  944. * Fixed build on mips.
  945. * Fixed handling of Linux systems without struct statfs64.
  946. * Fixed reporting signal mask by sigreturn on powerpc.
  947. * Fixed potential stack buffer overflow in select decoder.
  948. (Addresses Fedora bug #556678)
  949. * Corrected msgsnd indirect ipccall decoding.
  950. * Corrected decoding of 64bit syscalls.
  951. (Addresses Debian bug #570603)
  952. * Corrected getsockopt decoding on architectures where
  953. sizeof(long) > sizeof(int).
  954. (Addresses Debian bug #494844)
  955. * Corrected decoding of epoll_pwait.
  956. (Addresses Debian bug #513014)
  957. * Corrected handling of killed threads.
  958. Noteworthy changes in release 4.5.19 (2009-10-21)
  959. =================================================
  960. * Changes in behavior
  961. * When command exits, strace now exits with the same exit status.
  962. If command is terminated by a signal, strace terminates itself
  963. with the same signal, so that strace can be used as a wrapper
  964. process transparent to the invoking parent process.
  965. When using -p option, the exit status of strace is zero unless
  966. there was an unexpected error in doing the tracing.
  967. (Addresses Fedora bug #105371 and Debian bug #37665)
  968. * Improvements
  969. * Implemented decoding of new Linux syscalls: accept4, dup3,
  970. epoll_create1, eventfd2, inotify_init1, pipe2, signalfd4.
  971. * Implemented decoding of socket type flags introduced in Linux 2.6.27.
  972. * Implemented decoding of accept4 socketcall.
  973. * Enhanced prctl decoding.
  974. * Enhanced nanosleep decoding.
  975. * Enhanced ptrace decoding.
  976. * Enhanced futex decoding.
  977. * Enhanced CAP_* decoding.
  978. * Enhanced SIOCS* ioctls decoding.
  979. * Enhanced fcntl F_* flags decoding.
  980. * Enhanced semop/semtimedop decoding.
  981. * Updated ARM architecture support.
  982. * Added Blackfin architecture support.
  983. * Added AVR32 architecture support.
  984. * Added CRIS architecture support.
  985. * Made strace detect when traced process suddenly disappeared.
  986. * Bug fixes
  987. * Fixed syscall numbers for tee and sync_file_range.
  988. (Addresses Debian bug #503124)
  989. * Fixed several bugs in strings decoder, including potential heap
  990. memory corruption.
  991. (Addresses Fedora bugs #470529, #478324 and #511035)
  992. * Marked sendfile(2) as a network syscall.
  993. (Addresses Debian bug #509499)
  994. * Fixed accept(2) decoding.
  995. (Addresses Debian bug #507573)
  996. * Fixed sigtimedwait(2) decoding.
  997. * Fixed build on ARM EABI.
  998. (Addresses Debian bugs #520084 and #535564, and Fedora bug #507576)
  999. * Fixed display of 32-bit fcntl(F_SETLK) on 64-bit architectures.
  1000. (Addresses Red Hat bug #471169)
  1001. * Fixed display of 32-bit argv array on 64-bit architectures.
  1002. (Addresses Fedora bug #519480)
  1003. * Fixed display of 32-bit struct sigaction on 64-bit architectures.
  1004. * Fixed HPPA architecture support.
  1005. (Addresses Debian bugs #437928 and #546619)
  1006. Changes in 4.5.18
  1007. ==============
  1008. * Bug fixes.
  1009. * Support new Linux/PPC system call subpage_prot and PROT_SAO flag.
  1010. * In sigaction system call, display sa_flags value along with SIG_DFL/SIG_IGN.
  1011. Changes in 4.5.17
  1012. ==============
  1013. * Many bug fixes.
  1014. * -F is now deprecated, -f has traced vfork too on Linux for a long time now.
  1015. * Print O_CLOEXEC, MSG_CMSG_CLOEXEC flag bits.
  1016. * Improved output for prctl system call on Linux.
  1017. * Improved support for Linux/ARM.
  1018. * SA_NOMASK is now spelled SA_NODEFER, and SA_ONESHOT is spelled SA_RESETHAND.
  1019. Changes in 4.5.16
  1020. ==============
  1021. * Bug fixes.
  1022. * Improved output for delete_module, futex, and mbind system calls on Linux.
  1023. * Improved output for SG_IO ioctls on Linux.
  1024. * Support new Linux system calls move_pages, utimensat, signalfd, timerfd,
  1025. eventfd, getcpu, epoll_pwait.
  1026. Changes in 4.5.15
  1027. ==============
  1028. * Bug fixes.
  1029. * Several biarch improvements.
  1030. * Improved output for adjtimex, sysctl, quotactl, mount, umount.
  1031. * Support new Linux system calls *at, inotify*, pselect6, ppoll and unshare.
  1032. Changes in 4.5.14
  1033. ==============
  1034. * Bug fixes.
  1035. * Accept numeric system calls in -e.
  1036. Changes in 4.5.13
  1037. ==============
  1038. * Bug fixes.
  1039. * Introduce "-e trace=desc".
  1040. Changes in 4.5.12
  1041. ==============
  1042. * Bug fixes.
  1043. * Better x86-64 support for IA32 processes.
  1044. * Update PowerPC system calls.
  1045. * Better printing for Linux aio system calls.
  1046. Changes in 4.5.11
  1047. ==============
  1048. * Quick fix release for build issues.
  1049. * One fix for Linux/ARM system call table.
  1050. Changes in 4.5.10
  1051. ==============
  1052. * Bug fixes.
  1053. * Print fault address for SIGSEGV/SIGBUS signals when available.
  1054. Changes in 4.5.9
  1055. ==============
  1056. * Bug fixes.
  1057. * Improve socket ioctl printing.
  1058. * Update Linux/IA64 syscall list.
  1059. * Fix Linux/x86-64 syscall argument extraction for 32-bit processes.
  1060. * Improve mount flags printing.
  1061. * Support symbolic printing of x86_64 arch_prctl parameters.
  1062. Changes in 4.5.8
  1063. ==============
  1064. * Bug fixes.
  1065. * Update syscall tables for Alpha, ARM, HPPA.
  1066. * Support new Linux syscalls mbind, set_mempolicy, get_mempolicy, waitid.
  1067. * Support Linux syscalls fadvise64, fadvise64_64, and epoll_*.
  1068. * Improve ioctl command name matching.
  1069. * Print RTC_* ioctl structure contents.
  1070. * Support newer RLIMIT_* values.
  1071. * Print struct cmsghdr details in sendmsg.
  1072. Changes in 4.5.7
  1073. ==============
  1074. * Bug fixes.
  1075. * Print attribute values in *xattr system calls on Linux.
  1076. * Include pread and pwrite calls in -e read and -e write tracing.
  1077. * Update SO_* and IP_* value lists and add IPV6_* values for socket options.
  1078. * Print clock_t values symbolically in Linux clock_* system calls.
  1079. Changes in 4.5.6
  1080. ==============
  1081. * Bug fixes, Linux ioctl updates.
  1082. * David Miller contributed support for Linux/SPARC64.
  1083. Changes in 4.5.5
  1084. ==============
  1085. * Just bug fixes.
  1086. Changes in 4.5.4
  1087. ==============
  1088. * Update Linux ioctl lists.
  1089. * Update PF_* and AF_* value lists.
  1090. * The 4.5.3 -p behavior for NPTL threads applies only under -f, and got fixed.
  1091. Changes in 4.5.3
  1092. ==============
  1093. * Bug fixes.
  1094. * On Linux using NPTL threads, -p will now attach to all threads in a process.
  1095. * Handle new mq_* system calls in Linux 2.6.6 and later.
  1096. Changes in 4.5.2
  1097. ==============
  1098. * Bug fixes.
  1099. * Report some new VM_* bit values on Linux.
  1100. * Better output for Linux sched_* system calls.
  1101. Changes in 4.5.1
  1102. ==============
  1103. * Bug fixes.
  1104. * Display multiple ioctl name matches on Linux.
  1105. Changes in 4.5
  1106. ==============
  1107. * New port to AMD's x86-64 architecture. One strace binary can
  1108. handle both new x86-64 and old i386 processes.
  1109. * Fixed support for LFS64 calls.
  1110. * New switch -E to add/remove environment variables for the command.
  1111. * Merged s390/s390x port.
  1112. * Trace an unbounded number of processes.
  1113. * Handle numerous new system calls in Linux 2.5, and new threads semantics.
  1114. * Fixed bugs with attach/detach leaving things stopped.
  1115. * Fixed traced process seeing ECHILD despite live, traced children
  1116. in waitpid calls with WNOHANG.
  1117. * Stuart Menefy contributed a port to Linux/SH.
  1118. * Stephen Thomas contributed a port to Linux/SH64.
  1119. * Many other bug fixes.
  1120. Changes in 4.4
  1121. ==============
  1122. * Fix Linux/ia64 support, looks like someone renamed a few things on us
  1123. * Fix the ioctl setup for Linux, turned out it did not really work.
  1124. Improve the ioctl extractor as well so we decode some more ones.
  1125. Changes in 4.3.1
  1126. ================
  1127. * compile fixes for Linux/mips
  1128. Changes in 4.3
  1129. ==============
  1130. * Linux ia64 and hppa ports added
  1131. * The usual Linux syscall updates (includes 32bit uid/gid support),
  1132. * Linux ioctl list updated
  1133. * Support IPv6 scope ids
  1134. * FreeBSD/i386 port added
  1135. * UnixWare and Solaris updates
  1136. * Better support for tracing multithreaded processes in Linux
  1137. Changes in 4.2
  1138. ==============
  1139. * Compiles on glibc2.0 systems again
  1140. * Linux/S390 port added
  1141. * The usual Linux syscall updates
  1142. * we can follow fork on arm now
  1143. Changes in 4.1
  1144. ================
  1145. * Linux/MIPS port added
  1146. * Lots of Linux updates again
  1147. * Improved IPv6 support
  1148. * Add strace-graph
  1149. Changes in 4.0.1
  1150. ================
  1151. * Minor bugfixes
  1152. * Compiles on glibc2.0 systems again
  1153. Changes in 4.0
  1154. ==============
  1155. * Get stat structure properly on Linux 64bit archs
  1156. * Personalities work again
  1157. * Compile correctly on SunOS again
  1158. * IRIX64 updates
  1159. * Solaris updates
  1160. Changes in 3.99.1
  1161. =================
  1162. * Linux (ultra)sparc fixes
  1163. * Linux alpha fixes
  1164. * Minor cleanups
  1165. Changes in 3.99
  1166. ===============
  1167. * New maintainer
  1168. * add support for more Linux architectures (powerpc, sparc, arm)
  1169. * support lots more Linux syscalls
  1170. * fix signal handling
  1171. * add IPX and IPIP support
  1172. * check stray syscall after execv
  1173. * fix hanging children
  1174. Changes in version 3.1
  1175. ======================
  1176. * Irix5 is supported
  1177. * Linux 68k is supported
  1178. * Linux alpha is supported
  1179. * configure is upgraded to autoconf 2.x
  1180. * using -f in combination with -e now works correctly
  1181. * output can be piped to a program
  1182. * tracing setuid programs works better
  1183. * it is now reasonable to install strace setuid to root in some circumstances
  1184. * new useful tracing names like file and process to trace whole
  1185. classes of system calls, e.g. -efile traces all system calls that
  1186. take a file name as an argument
  1187. * IPC calls on SunOS 4.1.x are decoded
  1188. * Linux program memory is reliably dereferenced
  1189. * Linux decodes at least the name of all syscalls as of pre2.0.4
  1190. * various cosmetic changes and bug fixes
  1191. Changes from versions 2.x to version 3.0
  1192. ========================================
  1193. * filename arguments are neither abbreviated nor stringified
  1194. * string arguments are now true C strings using octal instead of hex by default
  1195. * preprocessor constants are never shortened (e.g. was RDONLY => now O_RDONLY)
  1196. * by default the output for multiple processes now goes into one file
  1197. * all structures, vectors, bitsets, etc. use consistent output formats
  1198. * the -c option now means count calls, -i does what the old -c used to do
  1199. New Features in version 3.0
  1200. ===========================
  1201. * non-ascii strings can be optionally printed entirely in hex
  1202. * the output format is readable when multiple processes are generating output
  1203. * exit values are printed in an alignment column
  1204. * is is possible to suppress messages about attaching and detaching
  1205. * various tracing features can be enabled on a per syscall/signal/desc basis
  1206. * selective tracing of syscalls
  1207. * selective printing of syscall structures
  1208. * selective abbreviation of long structures on a per syscall basis
  1209. * selective printing of raw syscall arguments and results
  1210. * selective tracing of signals
  1211. * selective dumping of all I/O read from file descriptors
  1212. * selective dumping of all I/O written to file descriptors
  1213. * optional counting of time, calls, and errors for each syscall