40 lines · c
1#include <stdint.h>2#include <stdio.h>3#include <stdlib.h>4 5int __llvm_profile_runtime = 0;6uint64_t __llvm_profile_get_size_for_buffer(void);7int __llvm_profile_write_buffer(char *);8void __llvm_profile_reset_counters(void);9int __llvm_profile_check_compatibility(const char *, uint64_t);10 11int gg = 0;12void bar(char c) {13 if (c == '1')14 gg++;15 else16 gg--;17}18 19/* Returns 0 (size) when an error occurs. */20uint64_t libEntry(char *Buffer, uint64_t MaxSize) {21 22 uint64_t Size = __llvm_profile_get_size_for_buffer();23 if (Size > MaxSize)24 return 0;25 26 __llvm_profile_reset_counters();27 28 bar('1');29 30 if (__llvm_profile_write_buffer(Buffer))31 return 0;32 33 /* Now check compatibility. Should return 0. */34 if (__llvm_profile_check_compatibility(Buffer, Size))35 return 0;36 37 return Size;38}39 40