sMVX: Multi-Variant Execution on Selected Code Paths

The duplicated execution context project. Duplicate the execution for selected code area (A lightweight MVX approach). It aims to Selective Program Duplication and Differential Execution.

Build sMVX

$ make                     
rm -rf obj libmonitor.so liblmvx.so
mkdir -p obj/lib
 [CC]		obj/libmonitor.o
 [CC]		obj/monitor_overrides.o
 [CC]		obj/pkey.o
 [CC]		obj/syscall_blocking.o
 [CC]		obj/loader.o
 [CC]		obj/lmvx.o
 [CC]		obj/trampoline.o
Generate libmonitor.so:
 [CC+LD]	libmonitor.so

 [CC]		obj/lib/liblmvx.o
Generate liblmvx.so:
 [CC+LD]	liblmvx.so

Run simple test cases

$ make
$ make -C test run_global_pointer
[14991] fun
my_struct_t.a 1, b 20, c 0x7fff105af3cc
[14991] main
INFO  update_pointers_self: # of old data pointers on *data+bss* 1   at update_pointers_self (loader.c:400) 
[14991] fun
my_struct_t.a 2, b 20, c 0x7fff105af3cc
INFO  update_heap_pointers_self: # of code pointers on *heap* 2   at update_heap_pointers_self (loader.c:410) 
[14992] fun
my_struct_t.a 2, b 20, c 0x7fff105af3cc
INFO  lmvx_end: finish lmvx region. status 0   at lmvx_end (lmvx.c:263) 
[14991] fun
my_struct_t.a 3, b 20, c 0x7fff105af3cc

Taint analysis