class Annotation: (source)
Known subclasses: claripy.annotation.SimplificationAvoidanceAnnotation, claripy.vsa.valueset.RegionAnnotation
Annotations are used to achieve claripy's goal of being an arithmetic instrumentation engine. They provide a means to pass extra information to the claripy backends.
| Method | relocate |
This is called when an annotation has to be relocated because of simplifications. |
| Property | eliminatable |
Returns whether this annotation can be eliminated in a simplification. |
| Property | relocatable |
Returns whether this annotation can be relocated in a simplification. |
claripy.vsa.valueset.RegionAnnotationThis is called when an annotation has to be relocated because of simplifications. Consider the following case: x = claripy.BVS('x', 32) zero = claripy.BVV(0, 32).add_annotation(your_annotation) y = x + zero Here, one of three things can happen: 1. if your_annotation.eliminatable is True, the simplifiers will simply eliminate your_annotation along with `zero` and `y is x` will hold 2. elif your_annotation.relocatable is False, the simplifier will abort and y will never be simplified 3. elif your_annotation.relocatable is True, the simplifier will run, determine that the simplified result of `x + zero` will be `x`. It will then call your_annotation.relocate(zero, x) to move the annotation away from the AST that is about to be eliminated. :param src: the old AST that was eliminated in the simplification :param dst: the new AST (the result of a simplification) :return: the annotation that will be applied to `dst`
claripy.annotation.SimplificationAvoidanceAnnotation, claripy.vsa.valueset.RegionAnnotationReturns whether this annotation can be eliminated in a simplification. :return: True if eliminatable, False otherwise
claripy.annotation.SimplificationAvoidanceAnnotation, claripy.vsa.valueset.RegionAnnotationReturns whether this annotation can be relocated in a simplification. :return: True if it can be relocated, false otherwise.