公开(公告)号：US20210240820A1

公开(公告)日：2021-08-05

申请号：US17237388

申请日：2021-04-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ting Dai ,  Yongzheng Wu ,  Tieyan Li

IPC: G06F21/54 ,  G06F8/41

Abstract: This document describes a device and method for validation of virtual function pointers. The method is about compiling a source code file with one or more classes whereby each of the classes has a virtual table, the compiling comprises: associating a security check function with the virtual function invocation site such that the associated security check function is executed prior to an invocation of the virtual function; generating a Class Hierarchy Hash Table (CHHT); whereby when the compiled source code file is executed, the security check function is used to determine whether an invoked virtual function pointer of a virtual function associated with the security check function is valid by looking up a indicator in the CHHT according to a hash result of the virtual function pointer and an address of a virtual table containing the virtual function pointer.

公开(公告)号：US11755723B2

公开(公告)日：2023-09-12

申请号：US17237388

申请日：2021-04-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ting Dai ,  Yongzheng Wu ,  Tieyan Li

IPC: G06F21/00 ,  G06F21/54 ,  G06F8/41

CPC classification number: G06F21/54 ,  G06F8/41 ,  G06F2221/033

Abstract: A method for validation of virtual function pointers includes compiling a source code file with one or more classes whereby each of the classes has a virtual table, and the compiling includes associating a security check function with the virtual function invocation site such that the associated security check function is executed prior to an invocation of the virtual function, generating a class hierarchy hash table (CHHT), whereby when the compiled source code file is executed, the security check function is used to determine whether an invoked virtual function pointer of a virtual function associated with the security check function is valid by looking up an indicator in the CHHT according to a hash result of the virtual function pointer and an address of a virtual table containing the virtual function pointer.