forked from Mirrors/privacore-open-source-search-engine
28 lines
781 B
C
28 lines
781 B
C
#ifndef GB_SIGNATURE_H_
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#define GB_SIGNATURE_H_
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//Macros for inserting a signature into critical structs for verification and
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//early and (relatively) cheap detection of memory clobbering
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extern void signature_verification_failed();
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#if 1
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#define declare_signature int signature;
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#define set_signature() signature = signature_init
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#define clear_signature() signature = 0
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#define verify_signature() if(__builtin_expect(signature!=signature_init,0)) signature_verification_failed()
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#define verify_signature_at(signature) if(__builtin_expect(signature!=signature_init,0)) signature_verification_failed()
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#else
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#define declare_signature
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#define set_signature()
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#define clear_signature()
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#define verify_signature()
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#define verify_signature_at(x)
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#endif
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#endif //GB_SIGNATURE_H_
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