06-01-2012
Thread specific data from linux core dump
How do i get pointer to thread's local storage or thread specific data while analyzing core dump for linux ?
i use pthread_setspecific to store some data in the pthread's local stoare.
my multi threaded program on linux crashed, and i want to see what is stored in current running thread's local storage.
If i get pointer to thread's local storage i can use key to get the data that is stored.
Is there a command in gdb to get the pointer to thread's local storage?
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LEARN ABOUT MOJAVE
pthread_setspecific
PTHREAD_SETSPECIFIC(3) BSD Library Functions Manual PTHREAD_SETSPECIFIC(3)
NAME
pthread_setspecific -- set a thread-specific data value
SYNOPSIS
#include <pthread.h>
int
pthread_setspecific(pthread_key_t key, const void *value);
DESCRIPTION
The pthread_setspecific() function associates a thread-specific value with a key obtained via a previous call to pthread_key_create(). Dif-
ferent threads can bind different values to the same key. These values are typically pointers to blocks of dynamically allocated memory that
have been reserved for use by the calling thread.
The effect of calling pthread_setspecific() with a key value not obtained from pthread_key_create() or after key has been deleted with
pthread_key_delete() is undefined.
The pthread_setspecific() function may be called from a thread-specific data destructor function, however this may result in lost storage or
infinite loops.
RETURN VALUES
If successful, the pthread_setspecific() function will return zero. Otherwise an error number will be returned to indicate the error.
ERRORS
The pthread_setspecific() function will fail if:
[ENOMEM] Insufficient memory exists to associate the value with the key.
[EINVAL] The key value is invalid.
SEE ALSO
pthread_getspecific(3), pthread_key_create(3), pthread_key_delete(3)
STANDARDS
The pthread_setspecific() function conforms to ISO/IEC 9945-1:1996 (``POSIX.1'').
BSD
April 4, 1996 BSD