Knowledge (XXG)

strace

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The most common use is to start a program using strace, which prints a list of system calls made by the program. This is useful if the program continually crashes, or does not behave as expected; for example using strace may reveal that the program is attempting to access a file which does not exist
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and many architectures on Linux (including ARM, IA-64, MIPS, PA-RISC, PowerPC, s390, SPARC) were introduced. In 2002, the burden of strace maintainership was transferred to Roland McGrath. Since then, strace gained support for several new Linux architectures (AMD64, s390x, SuperH), bi-architecture
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operating systems was 4.6, released in March 2011. In strace version 4.7, released in May 2012, all non-Linux code had been removed; since strace 4.13, the project follows Linux kernel's release schedule, and as of version 5.0, it follows Linux's versioning scheme as well.
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tools, offering similar or more advanced features; some of the tools (although using the same or a similar name) may use completely different work mechanisms, resulting in different feature sets or results. Such tools include the following:
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during that period. Since 2009, strace is actively maintained by Dmitry Levin. strace gained support for AArch64, ARC, AVR32, Blackfin, Meta, Nios II, OpenSISC 1000, RISC-V, Tile/TileGx, Xtensa architectures since that time.
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In 2012 strace also gained support for path tracing and file descriptor path decoding. In August 2014, strace 4.9 was released, where support for stack traces printing was added. In December 2016, syscall
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flag to attach to a running process. This is useful if a process has stopped responding, and might reveal, for example, that the process is blocking whilst attempting to make a network connection.
2026:(gdb). It is, however, easier to use than a code debugger, and is a very useful tool for system administrators. It is also used by researchers to generate system call traces for later 405:, releasing his version in November 1992 with the second release following in 1993. Richard Sladkey combined these separate versions of strace in 1993, and ported the program to 1581:
Maintainership passed to Roland McGrath; added x86-64 support on Linux with support of tracing of compat processes; added support for SH and SH64 architectures on Linux;
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Maintainership passed to Dmitry Levin; strace now terminates with the same exit code/signal as the traced program (if it was started by strace); added support for new
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is a useful utility to sort of debug programs for which no source is available which unfortunately includes almost all of the Sun supplied system software.
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Added support for HP PA/RISC and IA-64 architectures on Linux; added support for 32-bit UID/GID syscalls on Linux; added support for FreeBSD on x86
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New maintainer, Wichert Akkerman; added support for IBM POWER, SPARC, and ARM architectures on Linux; added support for many syscalls on Linux
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by Paul Kranenburg in 1991, according to its copyright notice, and published early in 1992, in volume three of comp.sources.sun. The initial
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support for some of them, and received numerous additions and improvements in syscalls decoders on Linux; strace development migrated to
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option provides some additional information, like endpoint addresses for sockets, paths and device major/minor numbers for files).
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The "(deleted)" marker of unlinked file descriptor paths is no longer interpreted as a part of a path; enhanced decoding of
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deliveries, and changes of process state. The operation of strace is made possible by the kernel feature known as
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Decoding of system error messages, however, is performed in accordance with the current locale since strace 4.22.
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Beginning in 1996, strace was maintained by Wichert Akkerman. During his tenure, strace development migrated to
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As strace only details system calls, it cannot be used to detect as many problems as a code debugger such as
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Perform translation of thread, process, process group, and session IDs appearing in the trace into strace's
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option enables printing of additional information, like minimum and maximum syscall execution time).
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option added, that combines regular and summary output; added Tile architecture support on Linux
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option, was originally added in strace 4.5, but was never documented as it did not work properly.
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Added long option aliases along with possibilities for more precise option specifications via
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Added support for the Irix OS, m68k and DEC Alpha architectures on Linux; added support for
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in 1994, resulting in strace 3.0 that was announced in comp.sources.misc in mid-1994.
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mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7f2c000
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syscalls on Linux; added Blackfin, AVR32, and CRIS architedcture support on Linux
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The above fragment is only a small part of the output of strace when run on the '
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Implemented collision resolution for overlapping terminal/sound ioctl commands
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is a system call tracer for Sun(tm) systems much like the Sun supplied program
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open(".", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = 3
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has a similar utility called StraceNT, written by Pankaj Garg, and a similar
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Stack tracing is supported for non-native personalities when compiled with
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Implemented System Call Vectored ABI support on the IBM POWER architecture
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write(1, "autofs\nbackups\ncache\nflexlm\ngames"..., 86autofsA
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Printing stack traces, including (since strace 4.21) symbol demangling (
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Initial cross-platform version by Richard Sladkey. Includes support for
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context information associated with processes, files, and descriptors (
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The last version of strace that had some (evidently dead) code for non-
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Specifying a filter of syscall names that should be traced (via the
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Diagnostic, debugging and instructional userspace utility for Linux
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Extracting information about file descriptors (including sockets,
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Specifying a list of file descriptors whose I/O should be dumped (
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systems provide other diagnostic tools similar to strace, such as
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structures used in the respective System V IPC syscalls commands
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fcntl64(3, F_GETFD) = 0x1 (flags FD_CLOEXEC)
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options; implemented various syscall statistics improvements
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Different operating systems feature other similar or related
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group to contain syscalls associated with process lifecycle:
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fstat64(3, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
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strace supports decoding of arguments of some classes of
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Added option for injecting data on syscall entry/exit (
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Added support for printing SELinux context mismatches (
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fstat64(1, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
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decoding on Linux; Irix 64 updates; Solaris updates
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Added support for 64-bit SPARC architecture on Linux.
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The following is an example of typical output of the
301: 1814:Among other features, strace allows the following: 1808: 296: 284: 272: 262: 142: 130: 120: 89: 57: 43: 33: 1723:option syntax; added support for syscall classes ( 2342:Its shorthand for showing only successful calls, 1519:attaches to all NPTL threads on Linux only when 3406:"The ioapps IO profiler and IO traces replayer" 1648:Added support for MIPS architecture on Linux; 401:Later, Branko Lankester ported this version to 1635:Added support for IBM Z architecture on Linux 2063:getdents64(3, /* 18 entries */, 4096) = 496 1731:); added support for IPC syscalls on Sun OS 8: 2389:"The strace Open Source Project on Open Hub" 1893:Tampering with the syscalls being executed ( 808:Changed the list of syscalls covered by the 19: 2069:close(3) = 0 2066:getdents64(3, /* 0 entries */, 4096) = 0 1932:; since strace 5.11) upon their execution. 1882:Printing relative or absolute time stamps ( 1859:Counting syscall execution time and count ( 1826:; using one of the predefined groups, like 1544:now attaches to all NPTL threads on Linux 453: 309: 109: 65: 25: 18: 3521:"IntellectualHeaven - Strace For Windows" 2111:that can trace library and system calls, 1841:Specifying a list of paths to be traced ( 1807:An alternative application is to use the 787:ioctl decoding; implemented decoding of 685:syscall decoding; imlemented decoding of 2455:"Strace - an alternative syscall tracer" 3471:"XTrace - trace X protocol connections" 2358: 2313: 1908:; since strace 4.16) and error code ( 1357:System call number can be supplied in 2708:Dmitry V. Levin (December 14, 2016). 2693:Dmitry V. Levin (December 14, 2016). 2476:Branko Lankester (November 5, 1992). 844:syscall decoding; added support for 781:syscall decoding; added support for 7: 2710:"Noteworthy changes in release 4.15" 2548:"How about removing non-Linux code?" 2270:Free and open-source software portal 1953:Filtering by syscall return status ( 1166:All non-Linux code had been removed 493:syscall and terminal ioctl commands 2674:"Noteworthy changes in release 4.9" 2672:Dmitry V. Levin (August 15, 2014). 2657:Dmitry V. Levin (August 15, 2014). 2638:"Noteworthy changes in release 4.7" 2606:Dmitry V. Levin (October 4, 2016). 2593:"Noteworthy changes in release 4.7" 2546:Denys Vlasenko (February 7, 2012). 681:option); added support for the new 3427:"The sreplay system call replayer" 2621:Dmitry V. Levin (March 19, 2019). 2591:Dmitry V. Levin (April 20, 2012). 2561:Dmitry V. Levin (March 16, 2011). 2491:Branko Lankester (June 18, 1993). 2411:"[PATCH] Add i18n support" 374:Strace was originally written for 14: 3568:"System Call Tracing with strace" 2453:Paul Kranenburg (March 2, 1992). 2329:The test suite is licensed under 840:were removed; added support for 589:option); added support for a new 3500:"dtrace(1) Mac OS X Manual Page" 2493:"second Linux release of strace" 2276: 2262: 1275:POWER-specific syscall on Linux 2636:Dmitry V. Levin (May 1, 2012). 2576:Dmitry V. Levin (May 2, 2012). 2478:"first Linux release of strace" 1916:; since strace 4.16), delays ( 539:syscalls; enhanced decoding of 3374:Dmitry V. Levin (2011-03-15). 3359:Dmitry V. Levin (2012-05-02). 3344:Dmitry V. Levin (2013-06-03). 3329:Dmitry V. Levin (2014-08-15). 3314:Dmitry V. Levin (2015-03-06). 3299:Dmitry V. Levin (2015-12-21). 3284:Dmitry V. Levin (2016-05-31). 3269:Dmitry V. Levin (2016-07-26). 3254:Dmitry V. Levin (2016-10-04). 3239:Dmitry V. Levin (2016-12-14). 3224:Dmitry V. Levin (2017-02-14). 3209:Dmitry V. Levin (2017-05-24). 3194:Dmitry V. Levin (2017-07-05). 3179:Dmitry V. Levin (2017-09-05). 3164:Dmitry V. Levin (2017-11-13). 3149:Dmitry V. Levin (2018-02-13). 3134:Dmitry V. Levin (2018-04-05). 3119:Dmitry V. Levin (2018-06-14). 3104:Dmitry V. Levin (2018-08-14). 3089:Dmitry V. Levin (2018-10-30). 3074:Dmitry V. Levin (2018-12-26). 3059:Dmitry V. Levin (2019-03-19). 3044:Dmitry V. Levin (2019-05-22). 3029:Dmitry V. Levin (2019-07-12). 3014:Dmitry V. Levin (2019-09-25). 2999:Dmitry V. Levin (2019-11-28). 2984:Dmitry V. Levin (2020-02-06). 2969:Dmitry V. Levin (2020-04-07). 2954:Dmitry V. Levin (2020-06-01). 2939:Dmitry V. Levin (2020-08-06). 2924:Dmitry V. Levin (2020-09-24). 2909:Dmitry V. Levin (2020-12-14). 2894:Dmitry V. Levin (2021-02-17). 2879:Dmitry V. Levin (2021-04-26). 2864:Dmitry V. Levin (2021-07-18). 2849:Dmitry V. Levin (2021-09-02). 2834:Dmitry V. Levin (2021-12-01). 2819:Dmitry V. Levin (2022-01-10). 2804:Dmitry V. Levin (2022-03-27). 2789:Dmitry V. Levin (2022-06-18). 2774:Dmitry V. Levin (2022-08-12). 2759:Dmitry V. Levin (2022-10-29). 2744:Dmitry V. Levin (2022-12-12). 2729:Dmitry V. Levin (2023-02-26). 2431:Dmitry V. Levin (2018-12-15). 2409:Dmitry V. Levin (2018-04-01). 382:file contained the following: 1: 3616:Free software programmed in C 3563:OS Reviews article on strace 2509:. manned.org. June 21, 1994. 1979:option; since strace 5.12). 3389:Rick Sladkey (1994-07-09). 2284:Computer programming portal 1968:option; since strace 5.9). 1904:option): modifying return ( 3637: 1957:option; since strace 5.2). 731:V4L2_BUF_TYPE_META_CAPTURE 652:Added support for the new 618:Added support for the new 1378:syscall group support to 1299:on Linux since long time 735:V4L2_BUF_TYPE_META_OUTPUT 446:feature was implemented. 85: 53: 24: 3475:xtrace.alioth.debian.org 3425:Waterland, Amos (2007). 2044: 568:Added support for a new 1901:tampering specification 1822:option): by name, like 1291:flag is deprecated, as 570:set_mempolicy_home_node 3606:Unix programming tools 3525:intellectualheaven.com 3446:Burton, Ariel (1998). 3316:"strace 4.10 released" 3301:"strace 4.11 released" 3286:"strace 4.12 released" 3271:"strace 4.13 released" 3256:"strace 4.14 released" 3241:"strace 4.15 released" 3226:"strace 4.16 released" 3211:"strace 4.17 released" 3196:"strace 4.18 released" 3181:"strace 4.19 released" 3166:"strace 4.20 released" 3151:"strace 4.21 released" 3136:"strace 4.22 released" 3121:"strace 4.23 released" 3106:"strace 4.24 released" 3091:"strace 4.25 released" 3076:"strace 4.26 released" 2911:"strace 5.10 released" 2896:"strace 5.11 released" 2881:"strace 5.12 released" 2866:"strace 5.13 released" 2851:"strace 5.14 released" 2836:"strace 5.15 released" 2821:"strace 5.16 released" 2806:"strace 5.17 released" 2791:"strace 5.18 released" 2776:"strace 5.19 released" 2695:"strace 4.15 released" 2608:"strace 4.14 released" 2243:-based utility called 1324:Added support for new 1189:Added support for new 399: 3611:Command-line software 3502:. Developer.apple.com 3376:"strace 4.6 released" 3361:"strace 4.7 released" 3346:"strace 4.8 released" 3331:"strace 4.9 released" 3061:"strace 5.0 released" 3046:"strace 5.1 released" 3031:"strace 5.2 released" 3016:"strace 5.3 released" 3001:"strace 5.4 released" 2986:"strace 5.5 released" 2971:"strace 5.6 released" 2956:"strace 5.7 released" 2941:"strace 5.8 released" 2926:"strace 5.9 released" 2761:"strace 6.0 released" 2746:"strace 6.1 released" 2731:"strace 6.2 released" 2659:"strace 4.9 released" 2623:"strace 5.0 released" 2578:"strace 4.7 released" 2563:"strace 4.6 released" 2527:on September 11, 2007 2297:List of Unix commands 1897:syscall specification 895:--relative-timestamps 891:--absolute-timestamps 760:; added support for 739:VIDIOC_QUERY_EXT_CTRL 506:Enhanced decoding of 489:Enhanced decoding of 384: 72:; 53 days ago 3404:Horky, Jiri (2013). 1540:syscalls on Linux; 587:--secontext=mismatch 3553:strace project page 1966:--pidns-translation 1843:-P /etc/ld.so.cache 1804:or cannot be read. 1213:syscalls on Linux; 691:FS_IOC{,32}_ETFLAGS 21: 2028:system call replay 1987:commands, such as 1836:-e trace=/clock_.* 1799:Usage and features 1536:Added support for 1344:syscalls on Linux 1271:Added support for 793:{msg,msq,sem}id_ds 777:Added support for 719:SIOCSIFHWBROADCAST 677:parameters of the 626:syscalls decoding 327:and instructional 35:Original author(s) 2237:Microsoft Windows 1796: 1795: 1577:24 September 2003 1211:rt_tgsigqueueinfo 932:25 September 2019 826:pidfd_send_signal 789:{msg,msq,sem}info 773:24 September 2020 764:syscall decoding 656:syscall decoding 593:syscall on Linux 572:syscall on Linux 533:io_uring_register 323:is a diagnostic, 318: 317: 3628: 3541: 3540: 3538: 3536: 3527:. 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473: 472:26 February 2023 463:Notable changes 454: 396: 392: 388: 343:, which include 314: 313: 306: 303: 193:Imagination META 132:Operating system 113: 108: 105: 103: 101: 80: 78: 73: 69: 29: 22: 3636: 3635: 3631: 3630: 3629: 3627: 3626: 3625: 3596: 3595: 3582:"Modern strace" 3572:Michael Kerrisk 3549: 3544: 3534: 3532: 3531:on 5 March 2016 3519: 3518: 3514: 3505: 3503: 3498: 3497: 3493: 3484: 3482: 3469: 3468: 3464: 3455: 3453: 3450: 3445: 3444: 3440: 3431: 3429: 3424: 3423: 3419: 3410: 3408: 3403: 3402: 3398: 3388: 3387: 3383: 3373: 3372: 3368: 3358: 3357: 3353: 3343: 3342: 3338: 3328: 3327: 3323: 3313: 3312: 3308: 3298: 3297: 3293: 3283: 3282: 3278: 3268: 3267: 3263: 3253: 3252: 3248: 3238: 3237: 3233: 3223: 3222: 3218: 3208: 3207: 3203: 3193: 3192: 3188: 3178: 3177: 3173: 3163: 3162: 3158: 3148: 3147: 3143: 3133: 3132: 3128: 3118: 3117: 3113: 3103: 3102: 3098: 3088: 3087: 3083: 3073: 3072: 3068: 3058: 3057: 3053: 3043: 3042: 3038: 3028: 3027: 3023: 3013: 3012: 3008: 2998: 2997: 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2077: 2074: 2071: 2068: 2065: 2062: 2059: 2056: 2053: 2050: 2046: 2039: 2036: 1976: 1965: 1954: 1947: 1940: 1936: 1929: 1925: 1921: 1917: 1913: 1909: 1905: 1894: 1887: 1883: 1876: 1872: 1868: 1864: 1860: 1853: 1849: 1845:, for example). 1842: 1835: 1831: 1827: 1823: 1819: 1801: 1789: 1785: 1781: 1777: 1773: 1769: 1765: 1761: 1757: 1753: 1749: 1745: 1739: 1728: 1724: 1720: 1714: 1701: 1689: 1678: 1672: 1660: 1649: 1643: 1631:21 January 2000 1630: 1617: 1605: 1593: 1582: 1576: 1564: 1552: 1541: 1537: 1531: 1520: 1516: 1511: 1499: 1486: 1474: 1463: 1459: 1456:fadvise64{,_64} 1455: 1451: 1447: 1443: 1438:19 October 2004 1437: 1426:4 February 2004 1425: 1413: 1401: 1389: 1379: 1375: 1369: 1358: 1353:16 January 2007 1352: 1341: 1337: 1333: 1329: 1325: 1320:16 January 2007 1319: 1307: 1296: 1292: 1288: 1283: 1272: 1266: 1255: 1251: 1247: 1243: 1239: 1235: 1231: 1226:21 October 2009 1225: 1214: 1210: 1206: 1202: 1198: 1195:perf_event_open 1194: 1190: 1184: 1174: 1161: 1151: 1141: 1131: 1121: 1111: 1101: 1091: 1081: 1071: 1061: 1051: 1041: 1031: 1021: 1011: 1001: 991: 982:30 October 2018 981: 971: 961: 951: 941: 931: 921: 910:6 February 2020 909: 899:--syscall-times 898: 894: 890: 886: 882: 878: 874: 868: 856: 848:ioctl decoding 845: 841: 837: 833: 830:rt_sigqueueinfo 829: 825: 821: 817: 813: 809: 803: 792: 788: 783: 778: 772: 762:process_madvise 761: 756: 749: 741:ioctl commands 738: 734: 730: 726: 722: 718: 714: 710: 706: 702: 698: 694: 690: 686: 682: 678: 674: 670: 664: 653: 647: 634: 623: 619: 613: 602:1 December 2021 601: 590: 586: 581:10 January 2022 580: 569: 563: 551: 540: 536: 532: 528: 522: 514:ioctl commands 511: 507: 502:29 October 2022 501: 490: 484: 471: 452: 450:Version history 444:fault injection 394: 390: 386: 372: 308: 300: 116: 98: 81: 76: 74: 71: 39:Paul Kranenburg 17: 12: 11: 5: 3634: 3632: 3624: 3623: 3618: 3613: 3608: 3598: 3597: 3594: 3593: 3579: 3565: 3560: 3555: 3548: 3547:External links 3545: 3543: 3542: 3512: 3491: 3462: 3438: 3417: 3396: 3381: 3366: 3351: 3336: 3321: 3306: 3291: 3276: 3261: 3246: 3231: 3216: 3201: 3186: 3171: 3156: 3141: 3126: 3111: 3096: 3081: 3066: 3051: 3036: 3021: 3006: 2991: 2976: 2961: 2946: 2931: 2916: 2901: 2886: 2871: 2856: 2841: 2826: 2811: 2796: 2781: 2766: 2751: 2736: 2721: 2700: 2685: 2664: 2649: 2628: 2613: 2598: 2583: 2568: 2553: 2538: 2512: 2498: 2483: 2468: 2445: 2435:(Mailing list) 2423: 2413:(Mailing list) 2401: 2380: 2369:. 21 July 2024 2367:"Release 6.10" 2357: 2355: 2352: 2349: 2348: 2335: 2322: 2312: 2311: 2309: 2306: 2305: 2304: 2299: 2294: 2288: 2287: 2273: 2257: 2254: 2253: 2252: 2234: 2224: 2214: 2204: 2187: 2177: 2173:has truss and 2164: 2152: 2140: 2092: 2089: 2045: 2035: 2032: 1981: 1980: 1969: 1958: 1951: 1944: 1933: 1891: 1880: 1857: 1846: 1839: 1800: 1797: 1794: 1793: 1742: 1737: 1733: 1732: 1717: 1712: 1708: 1707: 1704: 1699: 1695: 1694: 1692: 1687: 1683: 1682: 1675: 1670: 1666: 1665: 1663: 1658: 1654: 1653: 1646: 1641: 1637: 1636: 1633: 1628: 1624: 1623: 1620: 1615: 1611: 1610: 1608: 1603: 1599: 1598: 1596: 1594:19 August 2001 1591: 1587: 1586: 1579: 1574: 1570: 1569: 1567: 1562: 1558: 1557: 1555: 1550: 1546: 1545: 1534: 1529: 1525: 1524: 1514: 1509: 1505: 1504: 1502: 1497: 1493: 1492: 1489: 1484: 1480: 1479: 1477: 1475:31 August 2004 1472: 1468: 1467: 1440: 1435: 1431: 1430: 1428: 1423: 1419: 1418: 1416: 1411: 1407: 1406: 1404: 1399: 1395: 1394: 1392: 1387: 1383: 1382: 1372: 1367: 1363: 1362: 1361:specification 1355: 1350: 1346: 1345: 1322: 1317: 1313: 1312: 1310: 1305: 1301: 1300: 1286: 1281: 1277: 1276: 1269: 1267:28 August 2008 1264: 1260: 1259: 1228: 1223: 1219: 1218: 1187: 1182: 1178: 1177: 1172: 1168: 1167: 1164: 1159: 1155: 1154: 1149: 1145: 1144: 1142:15 August 2014 1139: 1135: 1134: 1129: 1125: 1124: 1119: 1115: 1114: 1109: 1105: 1104: 1099: 1095: 1094: 1092:4 October 2016 1089: 1085: 1084: 1079: 1075: 1074: 1069: 1065: 1064: 1059: 1055: 1054: 1049: 1045: 1044: 1039: 1035: 1034: 1029: 1025: 1024: 1019: 1015: 1014: 1009: 1005: 1004: 999: 995: 994: 992:14 August 2018 989: 985: 984: 979: 975: 974: 969: 965: 964: 959: 955: 954: 949: 945: 944: 939: 935: 934: 929: 925: 924: 919: 915: 914: 912: 907: 903: 902: 871: 866: 862: 861: 859: 854: 850: 849: 846:LOOP_CONFIGURE 806: 801: 797: 796: 775: 770: 766: 765: 752: 747: 743: 742: 667: 662: 658: 657: 650: 645: 641: 640: 637: 632: 628: 627: 616: 611: 607: 606: 604: 599: 595: 594: 583: 578: 574: 573: 566: 561: 557: 556: 554: 549: 545: 544: 525: 523:12 August 2022 520: 516: 515: 504: 499: 495: 494: 487: 482: 478: 477: 474: 469: 465: 464: 461: 458: 451: 448: 371: 368: 316: 315: 298: 294: 293: 288: 282: 281: 276: 270: 269: 264: 260: 259: 225:z/Architecture 146: 140: 139: 134: 128: 127: 122: 118: 117: 115: 114: 95: 93: 87: 86: 83: 82: 70:/ 21 July 2024 63: 61: 59:Stable release 55: 54: 51: 50: 47: 41: 40: 37: 31: 30: 15: 13: 10: 9: 6: 4: 3: 2: 3633: 3622: 3619: 3617: 3614: 3612: 3609: 3607: 3604: 3603: 3601: 3591: 3587: 3583: 3580: 3577: 3573: 3569: 3566: 3564: 3561: 3559: 3556: 3554: 3551: 3550: 3546: 3530: 3526: 3522: 3516: 3513: 3501: 3495: 3492: 3481:on 2014-08-05 3480: 3476: 3472: 3466: 3463: 3449: 3442: 3439: 3428: 3421: 3418: 3407: 3400: 3397: 3392: 3385: 3382: 3377: 3370: 3367: 3362: 3355: 3352: 3347: 3340: 3337: 3332: 3325: 3322: 3317: 3310: 3307: 3302: 3295: 3292: 3287: 3280: 3277: 3272: 3265: 3262: 3257: 3250: 3247: 3242: 3235: 3232: 3227: 3220: 3217: 3212: 3205: 3202: 3197: 3190: 3187: 3182: 3175: 3172: 3167: 3160: 3157: 3152: 3145: 3142: 3137: 3130: 3127: 3122: 3115: 3112: 3107: 3100: 3097: 3092: 3085: 3082: 3077: 3070: 3067: 3062: 3055: 3052: 3047: 3040: 3037: 3032: 3025: 3022: 3017: 3010: 3007: 3002: 2995: 2992: 2987: 2980: 2977: 2972: 2965: 2962: 2957: 2950: 2947: 2942: 2935: 2932: 2927: 2920: 2917: 2912: 2905: 2902: 2897: 2890: 2887: 2882: 2875: 2872: 2867: 2860: 2857: 2852: 2845: 2842: 2837: 2830: 2827: 2822: 2815: 2812: 2807: 2800: 2797: 2792: 2785: 2782: 2777: 2770: 2767: 2762: 2755: 2752: 2747: 2740: 2737: 2732: 2725: 2722: 2717: 2716: 2711: 2704: 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Openhub.net 2390: 2384: 2381: 2368: 2362: 2359: 2353: 2339: 2336: 2332: 2326: 2323: 2317: 2314: 2307: 2303: 2300: 2298: 2295: 2293: 2290: 2289: 2285: 2279: 2274: 2271: 2260: 2255: 2250: 2246: 2242: 2238: 2235: 2232: 2228: 2225: 2222: 2218: 2215: 2212: 2208: 2205: 2203: 2199: 2192:provides the 2191: 2188: 2182:provides the 2181: 2178: 2176: 2172: 2168: 2165: 2161: 2156: 2153: 2149: 2145:provides the 2144: 2141: 2138: 2134: 2130: 2126: 2122: 2118: 2114: 2110: 2106: 2103: 2102: 2101: 2098: 2091:Similar tools 2090: 2088: 2086: 2043: 2033: 2031: 2029: 2025: 2020: 2018: 2014: 2010: 2006: 2002: 1998: 1994: 1990: 1986: 1974: 1970: 1963: 1962:PID namespace 1959: 1952: 1945: 1934: 1918::delay_enter= 1902: 1898: 1892: 1881: 1858: 1847: 1840: 1817: 1816: 1815: 1812: 1805: 1798: 1784:qualifiers), 1743: 1738: 1735: 1734: 1718: 1713: 1710: 1709: 1705: 1702:27 April 1999 1700: 1697: 1696: 1693: 1688: 1685: 1684: 1677:Fixed 64-bit 1676: 1671: 1668: 1667: 1664: 1659: 1656: 1655: 1652:script added 1647: 1642: 1639: 1638: 1634: 1629: 1626: 1625: 1621: 1616: 1613: 1612: 1609: 1604: 1601: 1600: 1597: 1592: 1589: 1588: 1585:option added 1580: 1575: 1572: 1571: 1568: 1563: 1560: 1559: 1556: 1551: 1548: 1547: 1535: 1532:16 April 2004 1530: 1527: 1526: 1515: 1510: 1507: 1506: 1503: 1498: 1495: 1494: 1490: 1485: 1482: 1481: 1478: 1473: 1470: 1469: 1441: 1436: 1433: 1432: 1429: 1424: 1421: 1420: 1417: 1414:13 March 2005 1412: 1409: 1408: 1405: 1402:22 March 2005 1400: 1397: 1396: 1393: 1388: 1385: 1384: 1373: 1370:3 August 2005 1368: 1365: 1364: 1356: 1351: 1348: 1347: 1323: 1318: 1315: 1314: 1311: 1308:3 August 2007 1306: 1303: 1302: 1287: 1282: 1279: 1278: 1270: 1265: 1262: 1261: 1248:inotify_init1 1240:epoll_create1 1229: 1224: 1221: 1220: 1191:inotify_init1 1188: 1185:13 April 2010 1183: 1180: 1179: 1175:15 March 2011 1173: 1170: 1169: 1165: 1160: 1157: 1156: 1150: 1147: 1146: 1140: 1137: 1136: 1130: 1127: 1126: 1120: 1117: 1116: 1110: 1107: 1106: 1100: 1097: 1096: 1090: 1087: 1086: 1080: 1077: 1076: 1070: 1067: 1066: 1060: 1057: 1056: 1050: 1047: 1046: 1040: 1037: 1036: 1030: 1027: 1026: 1020: 1017: 1016: 1010: 1007: 1006: 1000: 997: 996: 990: 987: 986: 980: 977: 976: 970: 967: 966: 962:19 March 2019 960: 957: 956: 950: 947: 946: 940: 937: 936: 930: 927: 926: 920: 917: 916: 913: 908: 905: 904: 883:-e decode-fds 872: 867: 864: 863: 860: 855: 852: 851: 807: 804:6 August 2020 802: 799: 798: 786: 776: 771: 768: 767: 759: 753: 748: 745: 744: 668: 663: 660: 659: 654:mount_setattr 651: 648:26 April 2021 646: 643: 642: 638: 633: 630: 629: 617: 612: 609: 608: 605: 600: 597: 596: 584: 579: 576: 575: 567: 564:26 March 2022 562: 559: 558: 555: 550: 547: 546: 526: 521: 518: 517: 505: 500: 497: 496: 488: 483: 480: 479: 475: 470: 467: 466: 462: 460:Release date 459: 456: 455: 449: 447: 445: 439: 436: 431: 428: 423: 419: 414: 412: 408: 404: 398: 383: 381: 377: 369: 367: 365: 361: 356: 354: 350: 346: 342: 338: 334: 330: 326: 322: 312: 305: 299: 295: 292: 289: 287: 283: 280: 277: 275: 271: 268: 265: 261: 258: 254: 250: 246: 242: 238: 234: 230: 226: 222: 218: 214: 210: 206: 202: 198: 194: 190: 186: 182: 178: 174: 170: 166: 162: 161:ARM EABI/OABI 158: 154: 150: 147: 145: 141: 138: 135: 133: 129: 126: 123: 119: 112: 107: 97: 96: 94: 92: 88: 84: 68: 62: 60: 56: 52: 48: 46: 42: 38: 36: 32: 28: 23: 3576:NDC TechTown 3533:. 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Retrieved 2361: 2338: 2325: 2316: 2249:Sysinternals 2135:that extend 2112: 2094: 2082: 2037: 2027: 2024:GNU Debugger 2021: 1982: 1926::poke_enter= 1922::delay_exit= 1900: 1896: 1813: 1806: 1802: 1661:25 July 1999 1650:strace-graph 1618:1 April 2001 1606:7 April 2001 1553:1 March 2004 1523:is supplied 1500:27 June 2004 1487:12 July 2004 1448:et_mempolicy 1284:21 July 2008 1273:subpage_prot 1132:6 March 2015 1102:26 July 2016 1012:5 April 2018 1002:14 June 2018 942:12 July 2019 887:--decode-fds 869:7 April 2020 832:were added, 715:SIOCSIFENCAP 707:SIOCGIFENCAP 703:SIOCDELMULTI 699:SIOCADDMULTI 683:epoll_pwait2 635:18 July 2021 620:memfd_secret 552:18 June 2022 510:syscall and 440: 432: 415: 400: 385: 373: 357: 345:system calls 341:Linux kernel 331:utility for 320: 319: 263:Available in 189:Motorola 68k 77:21 July 2024 49:Dmitry Levin 45:Developer(s) 3558:Manual page 2531:January 14, 2157:offers the 2133:KernelShark 2019:protocols. 1977:--secontext 1930::poke_exit= 1740:9 July 1994 1715:1 June 1996 1690:9 June 1999 1679:struct stat 1673:9 July 1999 1512:3 June 2004 1390:8 June 2005 1152:3 June 2013 1112:31 May 2016 1062:24 May 2017 1052:5 July 2017 952:22 May 2019 857:1 June 2020 779:close_range 727:UBI_IOCSPEB 723:UBI_IOCRPEB 711:SIOCOUTQNSD 671:poke_enter= 624:quotactl_fd 591:futex_waitv 420:; ports to 235:32/64 bit, 231:32/64 bit, 215:32/64 bit, 3600:Categories 3590:DevConf.cz 3535:29 January 3506:2014-07-23 3485:2014-08-12 3456:2013-09-16 3432:2013-09-16 3411:2013-09-16 2439:2021-09-02 2417:2021-09-02 2395:2021-11-23 2354:References 2213:and DTrace 2119:programs, 1955:-e status= 1895:-e inject= 1875:options; 1462:syscalls, 1162:2 May 2012 842:faccessat2 834:arch_prctl 675:poke_exit= 543:structure 529:arch_prctl 291:LGPL v2.1+ 221:System/390 197:MicroBlaze 173:HP PA-RISC 121:Written in 91:Repository 64:6.10  3621:Debuggers 2459:Newsgroup 2331:GPL v2.0+ 2229:provides 2223:and kdump 2209:provides 2196:command, 2129:trace-cmd 2121:SystemTap 2049:stracels 2042:command: 1971:Decoding 1939:option; 1890:options). 1856:options). 1854:-e write= 1820:-e trace= 1380:-e trace= 1256:signalfd4 541:siginfo_t 395:strace(1) 387:strace(1) 360:Unix-like 337:processes 329:userspace 325:debugging 279:Debugging 213:Power ISA 185:LoongArch 171:, C-SKY, 153:DEC Alpha 2507:"strace" 2256:See also 2180:UnixWare 2034:Examples 1950:option). 1914::signal= 1906::retval= 1850:-e read= 1792:options 1334:pselect6 1330:inotify* 1244:eventfd2 1207:recvmmsg 875:-e quiet 810:%process 679:--inject 457:Version 391:trace(1) 339:and the 209:OpenRISC 169:Blackfin 144:Platform 2461::  2373:28 July 2217:OpenBSD 2190:FreeBSD 2186:command 2171:Illumos 2167:Solaris 2163:command 2151:command 2017:netlink 1989:BTRFS_* 1973:SELinux 1910::error= 1766:verbose 1729:process 1460:epoll_* 1442:Decode 1342:unshare 1295:traces 1232:accept4 1203:pwritev 879:--quiet 838:unshare 422:FreeBSD 411:Solaris 370:History 297:Website 286:License 267:English 253:x32 ABI 245:TILE-Gx 241:TILEPro 205:Nios II 149:AArch64 106:/strace 104:/strace 75: ( 3586:source 2715:GitHub 2679:GitHub 2643:GitHub 2231:ktrace 2221:ktrace 2211:ktrace 2207:NetBSD 2202:DTrace 2198:ktrace 2175:DTrace 2137:ftrace 2127:, and 2113:xtrace 2109:ltrace 2040:strace 2001:NSFS_* 1993:V4L2_* 1871:, and 1780:, and 1774:signal 1762:abbrev 1686:3.99.1 1458:, and 1452:waitid 1410:4.5.10 1398:4.5.11 1386:4.5.12 1366:4.5.13 1349:4.5.14 1316:4.5.15 1304:4.5.16 1280:4.5.17 1263:4.5.18 1222:4.5.19 1199:preadv 1181:4.5.20 897:, and 828:, and 822:tgkill 737:, and 695:GPIO_* 535:, and 380:README 353:ptrace 349:signal 321:strace 307:  302:strace 257:Xtensa 249:x86-64 229:SuperH 217:RISC-V 100:github 20:strace 3451:(PDF) 2308:Notes 2227:macOS 2219:uses 2194:truss 2184:truss 2155:HP-UX 2148:truss 2105:Linux 2013:KVM_* 2009:EVIO* 1985:ioctl 1832:%file 1782:write 1758:trace 1657:4.0.1 1602:4.3.1 1561:4.5.1 1549:4.5.2 1528:4.5.3 1508:4.5.4 1496:4.5.5 1483:4.5.6 1471:4.5.7 1464:RTC_* 1444:mbind 1434:4.5.8 1422:4.5.9 1338:ppoll 1297:vfork 1252:pipe2 818:tkill 784:TEE_* 757:libdw 537:prctl 512:PTP_* 508:setns 491:statx 435:Linux 403:Linux 376:SunOS 364:truss 358:Some 333:Linux 233:SPARC 181:IA-64 177:IA-32 165:AVR32 137:Linux 3592:2019 3578:2018 3537:2015 2533:2015 2375:2024 2302:lsof 2200:and 2160:Tusc 2131:and 2125:perf 2107:has 2005:MEM* 1997:DM_* 1928:and 1920:and 1886:and 1852:and 1828:%ipc 1778:read 1725:file 1698:3.99 1538:mq_* 1376:desc 1374:Add 1340:and 1236:dup3 1128:4.10 1118:4.11 1108:4.12 1098:4.13 1088:4.14 1078:4.15 1068:4.16 1058:4.17 1048:4.18 1038:4.19 1028:4.20 1018:4.21 1008:4.22 998:4.23 988:4.24 978:4.25 968:4.26 836:and 814:kill 791:and 746:5.10 673:and 661:5.11 644:5.12 631:5.13 622:and 610:5.14 598:5.15 577:5.16 560:5.17 548:5.18 519:5.19 409:and 407:SVR4 274:Type 237:TILE 201:MIPS 102:.com 3574:at 2292:gdb 2241:GUI 2143:AIX 2051:... 1941:-yy 1830:or 1770:raw 1736:3.0 1721:-o! 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Index


Original author(s)
Developer(s)
Stable release
Edit this on Wikidata
Repository
github.com/strace/strace
Edit this at Wikidata
C
Operating system
Linux
Platform
AArch64
DEC Alpha
ARC
ARM EABI/OABI
AVR32
Blackfin
HP PA-RISC
IA-32
IA-64
LoongArch
Motorola 68k
Imagination META
MicroBlaze
MIPS
Nios II
OpenRISC
Power ISA
RISC-V

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