lld/test/COFF/associative-comdat-mingw-weak.s

   1 # REQUIRES: x86
   2
   3 # RUN: llvm-mc -triple=x86_64-windows-gnu %s -filetype=obj -o %t.obj
   4 # RUN: llvm-readobj --symbols %t.obj | FileCheck %s --check-prefix=SYMBOL
   5
   6 # RUN: lld-link -lldmingw -entry:main %t.obj -out:%t.exe -lldmap:%t.map -verbose
   7 # RUN: llvm-readobj --sections %t.exe | FileCheck %s
   8
   9 # CHECK: Sections [
  10 # CHECK:   Section {
  11 # CHECK:     Number: 2
  12 # CHECK-LABEL:     Name: .rdata (2E 72 64 61 74 61 00 00)
  13 #             This is the critical check to show that .xdata$foo was
  14 #             retained, while .xdata$bar wasn't. This *must* be 0x24
  15 #             (0x4 for the .xdata section and 0x20 for the
  16 #             .ctors/.dtors headers/ends).
  17 # CHECK-NEXT:     VirtualSize: 0x24
  18
  19 # Check that the weak symbols still are emitted as it was when the test was
  20 # written, to make sure the test still actually tests what was intended.
  21
  22 # SYMBOL:       Symbol {
  23 # SYMBOL:         Name: foo
  24 # SYMBOL-NEXT:    Value: 0
  25 # SYMBOL-NEXT:    Section: IMAGE_SYM_UNDEFINED (0)
  26 # SYMBOL-NEXT:    BaseType: Null (0x0)
  27 # SYMBOL-NEXT:    ComplexType: Null (0x0)
  28 # SYMBOL-NEXT:    StorageClass: WeakExternal (0x69)
  29 # SYMBOL-NEXT:    AuxSymbolCount: 1
  30 # SYMBOL-NEXT:    AuxWeakExternal {
  31 # SYMBOL-NEXT:      Linked: .weak.foo.default.main (19)
  32 # SYMBOL-NEXT:      Search: Alias (0x3)
  33 # SYMBOL-NEXT:    }
  34 # SYMBOL-NEXT:  }
  35
  36         .text
  37         .globl          main
  38 main:
  39         call            foo
  40         retq
  41
  42 # See associative-comdat-mingw.s for the general setup. Here, the leader
  43 # symbols are weak, which causes the functions foo and bar to be undefined
  44 # weak externals, while the actual leader symbols are named like
  45 # .weak.foo.default.main.
  46
  47         .section        .xdata$foo,"dr"
  48         .linkonce       discard
  49         .long           42
  50
  51         .section        .xdata$bar,"dr"
  52         .linkonce       discard
  53         .long           43
  54
  55         .section        .text$foo,"xr",discard,foo
  56         .weak           foo
  57 foo:
  58         ret
  59
  60         .section        .text$bar,"xr",discard,bar
  61         .weak           bar
  62 bar:
  63         ret