Fujitsu Corporation

Maarten H Wiggers

Mukul Ranjan Prasad

Hiroaki Yoshida

Indradeep Ghosh

Ryusuke Masuoka

Zhexuan Song

According to an aspect of an embodiment, a method of establishing a chain of trust into a virtual machine on a hardware system is described. The method may include measuring an immutable portion of a virtual machine image configured to instantiate as the virtual machine to generate a trust anchor measurement. The method may also include storing the trust anchor measurement in a sealed memory.

Establishing a chain of trust within a virtual machine

A method of verifying software may include receiving a portion of a software program that includes multiple functions. The method may also include clustering the functions into two or more clusters of functions and generating a symbolic driver for each of the clusters of functions such that multiple symbolic drivers are generated. The clusters of functions may be symbolically executed using the symbolic drivers to generate concrete test cases for the functions in the clusters. In response to the coverage of the symbolic execution of the clusters of functions being less than a particular coverage or a number of the concrete test cases being more than a particular number of concrete test cases, the method may include re-clustering the functions.

Software verification

A method of verifying software includes receiving at least a portion of a software program. The portion of the software program may include a software function within a class. The method may also include generating a proxy class based on the class where the proxy class includes a proxy function that includes a call to the software function and analyzing the proxy function. The analysis of the proxy function may include analyzing the software function based on a proxy condition used by the proxy function, the proxy condition based on the software program and configured to apply conditions to parameters and/or variables in the software function.

A method includes, by one or more computing devices, determining instructions for a computing device to be evaluated, creating a first symbolic test driver including one or more of the instructions to be evaluated and a designation of a symbolic variable corresponding to a portion of the instructions, symbolically executing the instructions with respect to the symbolic variable, determining a test case from the results of the symbolic execution including one or more commands to execute the instructions with a given value for the symbolic variable, determining one or more calls to an object-oriented-programming component in the commands, creating a new symbolic test driver including the calls based on the determined calls, and subsequently symbolically executing the new symbolic test driver.

Iterative generation of symbolic test drivers for object-oriented languages

A method of testing software may include accessing first software that includes multiple execution paths and concretely executing the first software using a test case associated with second software to traverse at least a first execution path of the execution paths. The method may also include capturing concrete execution results produced from concretely executing the first software to record the first execution path and symbolically executing the first software using a symbolic input based on the recorded first execution path.

Software regression testing using symbolic execution

A method of testing software may include accessing software that includes multiple execution paths that each include one or more branching points. The method may also include concretely executing the software using multiple concrete inputs to traverse at least two of the execution paths of the software. The method may also include capturing concrete execution results produced from executing the software using the concrete inputs. The method may also include symbolically executing the software using one or more symbolic inputs based on the concrete execution results.

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San Jose, CA, United States of America

Maarten H Wiggers