ltrace – narzędzie analizy kodu badające interakcję programu z używanymi przez niego bibliotekami dzielonymi (shared libraries).

Przykład 1

Przykład wykonania dla trywialnego programu /bin/true:

$ ltrace /bin/true
__libc_start_main(0x8048a50, 1, 0xbffff434, 0x80499f0, 0x8049a50 <unfinished ...>
setlocale(6, "")                                                                                 = "en_US.UTF-8"
bindtextdomain("coreutils", "/usr/share/locale")                                                 = "/usr/share/locale"
textdomain("coreutils")                                                                          = "coreutils"
__cxa_atexit(0x8048b60, 0, 0, 0xbffff434, 0x41152190)                                            = 0
exit(0 <unfinished ...>
__fpending(0x41149d20, 0x804b254, 0x41152190, 0xbffff3c0, 0xbffff378)                            = 0
+++ exited (status 0) +++

Przykład 2

$ ltrace /bin/chmod 0777 xxx
__libc_start_main(0x80492f0, 3, 0xbffff424, 0x804b120, 0x804b180 <unfinished ...>
setlocale(6, "")                                                                                 = "en_US.UTF-8"
bindtextdomain("coreutils", "/usr/share/locale")                                                 = "/usr/share/locale"
textdomain("coreutils")                                                                          = "coreutils"
__cxa_atexit(0x8049720, 0, 0, 0, 0x41152190)                                                     = 0
getopt_long(3, 0xbffff424, "RcfvrwxXstugoa,+-=", 0x804b3c0, NULL)                                = -1
__ctype_b_loc(0x4000019c, 0x40000e90, 1, 0x41016c40, 35)                                         = 0x40011444
__errno_location()                                                                               = 0x40011440
__strtoul_internal("0777", 0xbffff308, 8)                                                        = 511
malloc(16)                                                                                       = 0x804d858
__xstat64(3, "xxx", 0xbffff2f0)                                                                  = 0
chmod("xxx", 0777)                                                                               = 0
__errno_location()                                                                               = 0x40011440
exit(0 <unfinished ...>
__fpending(0x41149d20, 131072, 0, 0, 0x40f33423)                                                 = 0
+++ exited (status 0) +++

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