bolt/test/AArch64/exclusive-instrument.s

   1 // This test checks that the foo function having exclusive memory access
   2 // instructions won't be instrumented.
   3
   4 // REQUIRES: system-linux,bolt-runtime,target=aarch64{{.*}}
   5
   6 // RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown \
   7 // RUN:   %s -o %t.o
   8 // RUN: %clang %cflags -fPIC -pie %t.o -o %t.exe -nostdlib -Wl,-q -Wl,-fini=dummy
   9 // RUN: llvm-bolt %t.exe -o %t.bolt -instrument -v=1 | FileCheck %s
  10
  11 // CHECK: Function foo has exclusive instructions, skip instrumentation
  12
  13 .global foo
  14 .type foo, %function
  15 foo:
  16   ldaxr w9, [x10]
  17   cbnz w9, .Lret
  18   stlxr w12, w11, [x9]
  19   cbz w12, foo
  20   clrex
  21 .Lret:
  22   ret
  23 .size foo, .-foo
  24
  25 .global _start
  26 .type _start, %function
  27 _start:
  28   cmp x0, #0
  29   b.eq .Lexit
  30   bl foo
  31 .Lexit:
  32   ret
  33 .size _start, .-_start
  34
  35 .global dummy
  36 .type dummy, %function
  37 dummy:
  38   ret
  39 .size dummy, .-dummy