Tag-Protector: An Effective and Dynamic Detection of Illegal Memory Accesses through Compile Time Code Instrumentation

Listing 6

LLVM-IR code (uninstrumented) for C code presented in Listing 5.

 //Lines 1-2 represent LLV-IR code for lines 1-2 of C code in Listing 5

1: %call = call noalias i8  @malloc (i64 80) #2

2: store i8  %call, i8  @buffer, align 8

 //Lines 3-7 represent LLV-IR code for line 3 of C code in Listing 5

3: %0 = load i8  @buffer, align 8

4: %arrayidx = getelementptr inbounds i8  %argv, i64 1

5: %1 = load i8  %arrayidx, align 8

6: % call1 = call i8  @strcpy (i8  %0, i8  %1) #2

7: ret i32 0