bolt/test/runtime/X86/hot-end-symbol.s

   1 # This reproduces a bug where BOLT would read __hot_end as
   2 # the name of a function even when -hot-text is used, which
   3 # means BOLT will emit another __hot_end label, eventually
   4 # asserting due to a symbol redefinition in MCStreamer.
   5
   6 # REQUIRES: system-linux
   7
   8 # RUN: llvm-mc -filetype=obj -triple x86_64-unknown-unknown \
   9 # RUN:   %s -o %t.o
  10 # RUN: link_fdata %s %t.o %t.fdata
  11 # RUN: llvm-strip --strip-unneeded %t.o
  12 # RUN: %clang %cflags -no-pie %t.o -o %t.exe -Wl,-q
  13
  14 # RUN: llvm-bolt %t.exe --relocs=1 --hot-text --reorder-functions=hfsort \
  15 # RUN:    --data %t.fdata -o %t.out | FileCheck %s
  16
  17 # RUN: %t.out 1
  18
  19 # CHECK: BOLT-INFO: setting __hot_end to
  20
  21 # RUN: llvm-nm -n %t.exe | FileCheck %s --check-prefix=CHECK-INPUT
  22 # RUN: llvm-nm -n %t.out | FileCheck %s --check-prefix=CHECK-OUTPUT
  23
  24 # CHECK-INPUT:       __hot_start
  25 # CHECK-INPUT-NEXT:  main
  26 # CHECK-INPUT-NEXT:  foo
  27 # CHECK-INPUT-NEXT:  __hot_end
  28
  29 # Our fdata only logs activity in main, so hot markers will change
  30 # CHECK-OUTPUT:       __hot_start
  31 # CHECK-OUTPUT-NEXT:  main
  32 # CHECK-OUTPUT-NEXT:  __hot_end
  33
  34   .text
  35   .globl  main
  36   .type main, %function
  37   .globl  __hot_start
  38   .type __hot_start, %object
  39   .p2align  4
  40 main:
  41 __hot_start:
  42 # FDATA: 0 [unknown] 0 1 main 0 0 510
  43   pushq %rbp
  44   movq  %rsp, %rbp
  45   cmpl  $0x2, %edi
  46   jb    .BBend
  47 .BB2:
  48   callq bar
  49   leaq mystring, %rdi
  50   callq puts
  51
  52 .BBend:
  53   xorq %rax, %rax
  54   leaveq
  55   retq
  56   .size main, .-main
  57
  58   .globl foo
  59   .type foo, %function
  60   .p2align 4
  61 foo:
  62   retq
  63   .size foo, .-foo
  64
  65   .globl __hot_end
  66   .type __hot_end, %object
  67   .p2align 2
  68 __hot_end:
  69   int3
  70   .size __hot_end, 0
  71
  72   .globl bar
  73   .type bar, %function
  74   .p2align 4
  75 bar:
  76   retq
  77   .size bar, .-bar
  78
  79   .data
  80 mystring: .asciz "test\n"