[BOLT][TEST] Add .so instrumentation test

Summary: Shared object instrumentation test

Test Plan: bin/llvm-lit -a bolt/test/X86/internal-call-instrument-so.s

Reviewers: rafauler

FBD34064557

bolt/test/X86/internal-call-instrument-so.s

@@ -0,0 +1,55 @@
+# This reproduces a bug with instrumentation crashes on internal call
+
+# REQUIRES: system-linux,bolt-runtime
+
+# RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown %s -o %t.o
+# Delete our BB symbols so BOLT doesn't mark them as entry points
+# RUN: llvm-strip --strip-unneeded %t.o
+# RUN: ld.lld %t.o -o %t.exe -q -shared -fini=_fini
+# RUN: llvm-bolt -instrument %t.exe -relocs -o %t.out
+
+  .text
+  .globl  _start
+  .type _start, %function
+  .p2align  4
+_start:
+  push   %rbp
+  mov    %rsp,%rbp
+  push   %r12
+  push   %rbx
+  sub    $0x120,%rsp
+  mov    $0x3,%rbx
+.J1:
+  cmp    $0x0,%rbx
+  je     .J2
+  callq  .J3
+  nopl   (%rax,%rax,1)
+  lea    var@GOTPCREL(%rip),%rax
+  retq
+.J2:
+  add    $0x120,%rsp
+  pop    %rbx
+  pop    %r12
+  jmp    .J4
+.J3:
+  pop    %rax
+  add    $0x4,%rax
+  dec    %rbx
+  jmp    .J1
+.J4:
+  pop    %rbp
+  retq
+  .size _start, .-_start
+
+
+  .globl  _fini
+  .type _fini, %function
+  .p2align  4
+_fini:
+  hlt
+  .size _fini, .-_fini
+
+  .data
+  .globl var
+var:
+  .quad 0xdeadbeef