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Top Forums Programming How to Find who is calling me? Post 62057 by Neo on Thursday 10th of February 2005 11:16:17 PM
Old 02-11-2005
Can you use strace ?

Code:
STRACE(1)                                               STRACE(1)

NAME
       strace - trace system calls and signals

SYNOPSIS
       strace [ -dffhiqrtttTvxx ] [ -acolumn ] [ -eexpr ] ...  [ -ofile ] [ -ppid
       ] ...  [ -sstrsize ] [ -uusername ] [ command [ arg ...  ] ]

       strace -c [ -eexpr ] ...  [ -Ooverhead ] [ -Ssortby ] [ command [ arg  ...
       ] ]

DESCRIPTION
       In the simplest case strace runs the specified command until it exits.  It
       intercepts and records the system calls which are called by a process  and
       the  signals  which  are  received  by a process.  The name of each system
       call, its arguments and its return value are printed on standard error  or
       to the file specified with the -o option.

       strace  is a useful diagnostic, instructional, and debugging tool.  System
       adminstrators, diagnosticians and trouble-shooters will find it invaluable
       for  solving  problems  with  programs for which the source is not readily
       available since they do not need to be recompiled in order to trace  them.
       Students,  hackers  and the overly-curious will find that a great deal can
       be learned about a system and its system calls by  tracing  even  ordinary
       programs.   And  programmers will find that since system calls and signals
       are events that happen at the user/kernel interface, a  close  examination
       of  this  boundary  is  very useful for bug isolation, sanity checking and
       attempting to capture race conditions.

... more available on man page

Or, did I misunderstand your question?
 

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pthread_getspecific(3T) 												   pthread_getspecific(3T)

NAME
pthread_getspecific(), pthread_setspecific() - get or set the thread-specific data associated with a key SYNOPSIS
PARAMETERS
key Thread-specific data key whose value for the calling thread is to be set or retrieved. value Value to be assigned to the thread-specific data key for the calling thread. DESCRIPTION
The function returns the thread-specific data value associated with key for the calling thread. If no value has been associated with key for the calling thread, NULL is returned. The function associates the thread-specific data value with key. Each thread may bind a different value to key. These values are usually pointers to memory dynamically allocated by the calling thread. key must be a valid thread-specific data key created by calling If key is not a valid thread-specific data key, undefined behavior results when calling these functions. These functions may be called from a thread-specific data destructor function. However, calling from a destructor may result in lost stor- age. RETURN VALUE
The function returns the thread-specific data value associated with key. If no thread-specific data value is currently associated with key, the value NULL is returned. If successful, returns zero. Otherwise, an error number is returned to indicate the error (the variable is not set). ERRORS
No errors are returned by the function. If any of the following occur, the function returns the corresponding error number: [ENOMEM] There is insufficient memory available in which to associate value with key. For each of the following conditions, if the condition is detected, the function returns the corresponding error number: [EINVAL] key is an invalid thread-specific data key. AUTHOR
and were derived from the IEEE POSIX P1003.1c standard. SEE ALSO
pthread_key_create(3T), pthread_key_delete(3T). STANDARDS CONFORMANCE
Pthread Library pthread_getspecific(3T)
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