User Commands apptrace(1)
NAME
apptrace - trace application function calls to Solaris
shared librariesSYNOPSIS
apptrace [-f] [-F [!] tracefromlist] [-T [!] tracetolist]
[-o outputfile] [ [-tv] [!] call ,...] command
[command arguments]DESCRIPTION
The apptrace utility runs the executable program specified
by command and traces all function calls that the program-
command makes to the Solaris shared libraries. For eachfunction call that is traceable, apptrace reports the name
of the library interface called, the values of the arguments passed, and the return value.By default, apptrace traces calls directly from the execut-
able object to any of the shared objects it depends on. Indirect calls (that is, calls made between shared objects that the executable depends upon) are not reported by default. Calls from or to additional shared objects may be tracedusing the -F or -T options (see below).
The default reporting format is a single line per call, with no formatted printing of arguments passed by reference or of data structures. Formatted printing providing additional argument details isobtained using the -v option (see below).
By default, every interface provided by a shared object is traced if called. However, the set of interfaces to betraced can be restricted, using the -t and/or -v options.
Since it is generally possible to trace calls between any of the dynamic objects linked at runtime (the executable object and any of the shared objects depended upon), the report of each traced call gives the name of the object from which the call was made.SunOS 5.11 Last change: 14 July 2010 1
User Commands apptrace(1)
apptrace traces all of the procedure calls that occur
between dynamic objects via the procedure linkage table, so only those procedure calls which are bound via the table will be traced. See the Linker and Libraries Guide. OPTIONS The following options are supported:-f Follows all children created by
fork(2). This option will also cause the process id to be printed at the beginning of each line.-F [!]tracefromlist Traces calls from a comma-separated
list of shared objects. Only calls from these shared objects will be traced. The default is to trace calls from the main executable only. Only the basename of the shared object is required. For example, libc will match /usr/lib/libc.so.1. Additionally, shell style wildcard characters are supported asdescribed in fnmatch(5). A list pre-
ceded by a ``!'' defines a list of objects from which calls should not be traced. If the tracing of callsfrom command is required, then com-
mand must be a member of tracefrom-
list.-o outputfile apptrace output will be directed to
the outputfile. By default, apptrace
output is placed on the stderr stream of the process being traced.-t [!]call,... Traces or excludes function calls.
Those calls specified in the comma-
separated list call are traced. Ifthe list begins with a !, the speci-
fied function calls are excluded from the trace output. The defaultis -t *. The use of shell style
wildcards is allowed.-T [!]tracetolist Traces calls to a comma-separated
list of shared objects. The default is to trace calls to all sharedSunOS 5.11 Last change: 14 July 2010 2
User Commands apptrace(1)
objects. As above, the basename is all that is required and wildcarding is allowed. A list preceded by a ``!'' denotes a list of objects to which calls should not be traced.-v [!]call,... Provides verbose, formatted output
of the arguments and return values of the function calls specified (asabove in the -t option). Unlike
truss(1), calls named by the -v
option do not have to be named bythe -t option. For example, apptrace
-v open is equivalent to truss -t
open -v open.
EXAMPLES
Example 1 Tracing the date command% apptrace date
-> date -> libc.so.1:atexit(0xff3bf9ac, 0x22000, 0x0) ** NR
-> date -> libc.so.1:atexit(0x11550, 0xfefeef80, 0xab268) ** NR
-> date -> libc.so.1:setlocale(0x6, 0x11560, 0x0) ** NR
-> date -> libc.so.1:textdomain(0x11564, 0xfefce156, 0xff160200) ** NR
-> date -> libc.so.1:int getopt(int = 0x1,
const char * * = 0xffbffa5c, const char * = 0x11574 "a:u")<- date -> libc.so.1:getopt() = 0xffffffff
-> date -> libc.so.1:time_t time(time_t * = 0x225c0)
<- date -> libc.so.1:time() = 0x41ab6e82
-> date -> libc.so.1:char * nl_langinfo(nl_item = 0x3a)
<- date -> libc.so.1:nl_langinfo() = 0xfefd3e10
-> date -> libc.so.1:struct tm * localtime(const time_t * = 0x225c0)
<- date -> libc.so.1:localtime() = 0xff160240
-> date -> libc.so.1:memcpy(0xffbff9cc, 0xff160240, 0x24) ** NR
-> date -> libc.so.1:size_t strftime(char * = 0x225c4 "",
size_t = 0x400,
const char * = 0xfefd3e10 "%a %b %e %T %Z %Y",
const struct tm * = 0xffbff9cc)<- date -> libc.so.1:strftime() = 0x1c
-> date -> libc.so.1:int puts(const char * = 0x225c4
"Mon Nov 29 10:46:26 PST 2004") Mon Nov 29 10:46:26 PST 2004<- date -> libc.so.1:puts() = 0x1d
-> date -> libc.so.1:exit(0x0, 0x22400, 0x0) ** NR
Example 2 Tracing a specific set of interfaces with verbos-
ity setSunOS 5.11 Last change: 14 July 2010 3
User Commands apptrace(1)
% apptrace -v localtime,strftime,puts date
-> date -> libc.so.1:struct tm * localtime(const time_t * = 0x225c0)
arg0 = (const time_t *) 0x225c0
return = (struct tm *) 0xff160280 (struct tm) {tm_sec: (int) 0x4
tm_min: (int) 0x34
tm_hour: (int) 0xa
tm_mday: (int) 0x1d
tm_mon: (int) 0xa
tm_year: (int) 0x68
tm_wday: (int) 0x1
tm_yday: (int) 0x14d
tm_isdst: (int) 0
}<- date -> libc.so.1:localtime() = 0xff160280
-> date -> libc.so.1:size_t strftime(char * = 0x225c4 "",
size_t = 0x400,
const char * = 0xfefd3e10 "%a %b %e %T %Z %Y",
const struct tm * = 0xffbff99c) arg0 = (char *) 0x225c4 ""arg1 = (size_t) 0x400
arg2 = (const char *) 0xfefd3e10 "%a %b %e %T %Z %Y"
arg3 = (const struct tm *) 0xffbff99c (struct tm) {tm_sec: (int) 0x4
tm_min: (int) 0x34
tm_hour: (int) 0xa
tm_mday: (int) 0x1d
tm_mon: (int) 0xa
tm_year: (int) 0x68
tm_wday: (int) 0x1
tm_yday: (int) 0x14d
tm_isdst: (int) 0
}return = (size_t) 0x1c
<- date -> libc.so.1:strftime() = 0x1c
-> date -> libc.so.1:int puts(const char * = 0x225c4
"Mon Nov 29 10:52:04 PST 2004") arg0 = (const char *) 0x225c4 "Mon Nov 29 10:52:04 PST 2004" Mon Nov 29 10:52:04 PST 2004 return = (int) 0x1d<- date -> libc.so.1:puts() = 0x1d
** NR - The return value of a function call will not be
traced. FILESBasic runtime support for apptrace is provided by the link
auditing feature of the Solaris runtime linker (ld.so.1(1))and the apptrace command's use of this facility relies on an
SunOS 5.11 Last change: 14 July 2010 4
User Commands apptrace(1)
auditing object (apptrace.so.1) kept in /usr/lib/abi.
LIMITATIONSIn general, apptrace cannot trace calls to functions accept-
ing variable argument lists. There has been some clever cod-
ing in several specific cases to work around this limita-
tion, most notably in the printf and scanf families.The apptrace utility can not trace the return value of a
function call whose return type is a struct or union. Functions that attempt to probe the stack or otherwise extract information about the caller cannot be traced. Some examples are [gs]etcontext(), [sig]longjmp(), [sig]setjmp(), and vfork(). Functions such as exit(2) that do not return will not be traced for their return values. For security reasons, only those processes with appropriateprivileges can use apptrace to trace setuid/setgid programs.
Tracing functions whose usage requires the inclusion of, such as vwprintw(3XCURSES) and vwscanw(3XCURSES), will not provide formatted printing of arguments. ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | developer/apptrace (32-bit) |
| | SUNWcstlx (64-bit) |
|_____________________________|_____________________________|
| Interface Stability | Uncommitted ||_____________________________|_____________________________|
SEE ALSO
ld.so.1(1), truss(1), vwprintw(3XCURSES), vwscanw(3XCURSES), attributes(5), fnmatch(5)SunOS 5.11 Last change: 14 July 2010 5
User Commands apptrace(1)
Linker and Libraries GuideSunOS 5.11 Last change: 14 July 2010 6