Integration tests

[mmarchini]

Write integration tests that use the library and use readelf/objdump/etc. to ensure that the generated file is correct.

[alan-maguire]

something like the following might be useful; I did this using the python stapsdt example:

$ sudo cat /proc/$(pgrep example.py)/maps|grep pythonapp
7f13289ff000-7f1328a00000 r-xp 00000000 00:01 258616                     /memfd:libstapsdt:pythonapp (deleted)
7f1328a00000-7f1328bff000 ---p 00001000 00:01 258616                     /memfd:libstapsdt:pythonapp (deleted)
7f1328bff000-7f1328c00000 rw-p 00000000 00:01 258616                     /memfd:libstapsdt:pythonapp (deleted)

# Extract the library from the address space of the process:

$ dd if=/proc/$(pgrep example.py)/mem of=out.lib bs=1 count=$((0x7f1328a00000-0x7f13289ff000)) skip=$((0x7f13289ff000))

$ nm -D out.lib
0000000000200120 D __bss_start
0000000000200120 D _edata
0000000000200120 D _end
0000000000000260 T firstProbe

$ readelf -n out.lib

Displaying notes found in: .note.stapsdt
  Owner                Data size 	Description
  stapsdt              0x0000003c	NT_STAPSDT (SystemTap probe descriptors)
    Provider: pythonapp
    Name: firstProbe
    Location: 0x0000000000000260, Base: 0x0000000000000318, Semaphore: 0x0000000000000000
    Arguments: 8@%rdi -4@%rsi