FILE 1 file1_1.cc
FILE 2 file1_2.cc
FILE 3 file1_3.cc
FUNC 1000 Function1_1
1000 44 1
1004 45 1
1008 46 1
FUNC 1100 Function1_2
1100 65 2
1104 66 2
FUNC 1200 Function1_3
FUNC 1300 Function1_4