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:    --split-functions --split-strategy=all \
  16 # RUN:    --data %t.fdata -o %t.out | FileCheck %s
  17
  18 # RUN: %t.out 1
  19
  20 # CHECK: BOLT-INFO: setting __hot_end to
  21
  22 # RUN: llvm-nm -n %t.exe | FileCheck %s --check-prefix=CHECK-INPUT
  23 # RUN: llvm-nm -n %t.out | FileCheck %s --check-prefix=CHECK-OUTPUT
  24
  25 # CHECK-INPUT:       __hot_start
  26 # CHECK-INPUT-NEXT:  main
  27 # CHECK-INPUT-NEXT:  foo
  28 # CHECK-INPUT-NEXT:  __hot_end
  29
  30 # Our fdata only logs activity in main, so hot markers will change
  31 # CHECK-OUTPUT:       __hot_start
  32 # CHECK-OUTPUT-NEXT:  main
  33 # CHECK-OUTPUT-NEXT:  __hot_end
  34 # CHECK-OUTPUT-NOT:   __hot_start.cold
  35
  36   .text
  37   .globl  main
  38   .type main, %function
  39   .globl  __hot_start
  40   .p2align  4
  41 main:
  42 __hot_start:
  43 # FDATA: 0 [unknown] 0 1 main 0 0 510
  44   pushq %rbp
  45   movq  %rsp, %rbp
  46   cmpl  $0x2, %edi
  47   jb    .BBend
  48 .BB2:
  49   callq bar
  50   leaq mystring, %rdi
  51   callq puts
  52
  53 .BBend:
  54   xorq %rax, %rax
  55   leaveq
  56   retq
  57   .size main, .-main
  58
  59   .globl foo
  60   .type foo, %function
  61   .p2align 4
  62 foo:
  63   retq
  64   .size foo, .-foo
  65
  66   .globl __hot_end
  67   .type __hot_end, %object
  68   .p2align 2
  69 __hot_end:
  70   int3
  71   .size __hot_end, 0
  72
  73   .globl bar
  74   .type bar, %function
  75   .p2align 4
  76 bar:
  77   retq
  78   .size bar, .-bar
  79
  80   .data
  81 mystring: .asciz "test\n"