% PT_INSN_GET_IMAGE(3)

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# NAME

pt_insn_get_image, pt_insn_set_image - get/set an Intel(R) Processor Trace
instruction flow decoder's traced memory image descriptor


# SYNOPSIS

| **\#include `<intel-pt.h>`**
|
| **struct pt_image \*pt_insn_get_image(struct pt_insn_decoder \**decoder*);**
|
| **int pt_insn_set_image(struct pt_insn_decoder \**decoder*,**
|                       **struct pt_image \**image*);**

Link with *-lipt*.


# DESCRIPTION

**pt_insn_get_image**() returns the traced memory image descriptor that
*decoder* uses for reading instruction memory.  See **pt_image_alloc**(3).
Every decoder comes with a default *pt_image* object that is initially empty and
that will automatically be destroyed when the decoder is freed.

**pt_insn_set_image**() sets the traced memory image descriptor that *decoder*
uses for reading instruction memory.  If the *image* argument is NULL, sets
*decoder*'s image to be its default image.  The user is responsible for freeing
the *pt_image* object that *image* points to when it is no longer needed.


# RETURN VALUE

**pt_insn_get_image**() returns a pointer to *decoder*'s *pt_image* object.  The
returned pointer is NULL if the *decoder* argument is NULL.

**pt_insn_set_image**() returns zero on success or a negative *pt_error_code*
enumeration constant in case of an error.


# ERRORS

pte_invalid
:   The *decoder* argument is NULL.


# NOTES

One *pt_image* object must not be shared between multiple decoders.  Use
**pt_image_copy**(3) to copy a common image.


# SEE ALSO

**pt_insn_alloc_decoder**(3), **pt_insn_free_decoder**(3), **pt_insn_next**(3)
