lld/test/ELF/symbol-ordering-file-warnings.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t1.o
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %S/Inputs/symbol-ordering-file-warnings1.s -o %t2.o
   4 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %S/Inputs/symbol-ordering-file-warnings2.s -o %t3.o
   5 # RUN: ld.lld -shared %t2.o -o %t.so
   6
   7 # Check that a warning is emitted for entries in the file that are not present in any used input.
   8 # RUN: echo "missing" > %t-order-missing.txt
   9 # RUN: ld.lld %t1.o -o %t --symbol-ordering-file %t-order-missing.txt \
  10 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN,MISSING
  11
  12 # Check that the warning can be disabled.
  13 # RUN: ld.lld %t1.o -o %t --symbol-ordering-file %t-order-missing.txt \
  14 # RUN:   --unresolved-symbols=ignore-all --no-warn-symbol-ordering 2>&1 | \
  15 # RUN:   FileCheck %s --check-prefixes=WARN --allow-empty
  16
  17 # Check that the warning can be re-enabled
  18 # RUN: ld.lld %t1.o -o %t --symbol-ordering-file %t-order-missing.txt \
  19 # RUN:   --unresolved-symbols=ignore-all --no-warn-symbol-ordering --warn-symbol-ordering 2>&1 | \
  20 # RUN:   FileCheck %s --check-prefixes=WARN,MISSING
  21
  22 # Check that a warning is emitted for imported shared symbols.
  23 # RUN: echo "shared" > %t-order-shared.txt
  24 # RUN: ld.lld %t1.o %t.so -o %t --symbol-ordering-file %t-order-shared.txt \
  25 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN,SHARED
  26
  27 # Check that a warning is emitted for absolute symbols.
  28 # RUN: echo "absolute" > %t-order-absolute.txt
  29 # RUN: ld.lld %t1.o -o %t --symbol-ordering-file %t-order-absolute.txt \
  30 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN,ABSOLUTE
  31
  32 # Check that a warning is emitted for symbols discarded due to --gc-sections.
  33 # RUN: echo "gc" > %t-order-gc.txt
  34 # RUN: ld.lld %t1.o -o %t --symbol-ordering-file %t-order-gc.txt --gc-sections \
  35 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN,GC
  36
  37 # Check that a warning is not emitted for the symbol removed due to --icf.
  38 # RUN: echo "icf1" > %t-order-icf.txt
  39 # RUN: echo "icf2" >> %t-order-icf.txt
  40 # RUN: ld.lld %t1.o -o %t --symbol-ordering-file %t-order-icf.txt --icf=all \
  41 # RUN:   --unresolved-symbols=ignore-all --fatal-warnings
  42
  43 # RUN: echo "_GLOBAL_OFFSET_TABLE_" > %t-order-synthetic.txt
  44 # RUN: ld.lld %t1.o -o %t --symbol-ordering-file %t-order-synthetic.txt --icf=all \
  45 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN,SYNTHETIC
  46
  47 # Check that a warning is emitted for symbols discarded due to a linker script /DISCARD/ section.
  48 # RUN: echo "discard" > %t-order-discard.txt
  49 # RUN: echo "SECTIONS { /DISCARD/ : { *(.text.discard) } }" > %t.script
  50 # RUN: ld.lld %t1.o -o %t --symbol-ordering-file %t-order-discard.txt -T %t.script \
  51 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN,DISCARD
  52
  53 # Check that LLD does not warn for discarded COMDAT symbols, if they are present in the kept instance.
  54 # RUN: echo "comdat" > %t-order-comdat.txt
  55 # RUN: ld.lld %t1.o %t2.o -o %t --symbol-ordering-file %t-order-comdat.txt \
  56 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN --allow-empty
  57
  58 # Check that if a COMDAT was unused and discarded via --gc-sections, warn for each instance.
  59 # RUN: ld.lld %t1.o %t2.o -o %t --symbol-ordering-file %t-order-comdat.txt --gc-sections \
  60 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN,COMDAT
  61
  62 # Check that if a weak symbol is not kept, because of an equivalent global symbol, no warning is emitted.
  63 # RUN: echo "glob_or_wk" > %t-order-weak.txt
  64 # RUN: ld.lld %t1.o %t2.o -o %t --symbol-ordering-file %t-order-weak.txt \
  65 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN --allow-empty
  66
  67 # Check that symbols only in unused archive members does not result in a warning.
  68 # RUN: rm -f %t.a
  69 # RUN: llvm-ar rc %t.a %t3.o
  70 # RUN: ld.lld %t1.o %t.a -o %t --symbol-ordering-file %t-order-missing.txt \
  71 # RUN:   --unresolved-symbols=ignore-all 2>&1 | count 0
  72
  73 # Check that a warning for each same-named symbol with an issue.
  74 # RUN: echo "multi" > %t-order-same-name.txt
  75 # RUN: ld.lld %t1.o %t2.o %t3.o -o %t --symbol-ordering-file %t-order-same-name.txt \
  76 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN,MULTI
  77
  78 # Check that a warning is emitted if the same symbol is mentioned multiple times in the ordering file.
  79 # RUN: echo "_start" > %t-order-multiple-same.txt
  80 # RUN: echo "_start" >> %t-order-multiple-same.txt
  81 # RUN: ld.lld %t1.o -o %t --symbol-ordering-file %t-order-multiple-same.txt \
  82 # RUN:   --unresolved-symbols=ignore-all 2>&1 | FileCheck %s --check-prefixes=WARN,SAMESYM
  83
  84 # Check that all warnings can be emitted from the same input.
  85 # RUN: echo "missing_sym" > %t-order-multi.txt
  86 # RUN: echo "undefined" >> %t-order-multi.txt
  87 # RUN: echo "_start" >> %t-order-multi.txt
  88 # RUN: echo "shared" >> %t-order-multi.txt
  89 # RUN: echo "absolute" >> %t-order-multi.txt
  90 # RUN: echo "gc" >> %t-order-multi.txt
  91 # RUN: echo "discard" >> %t-order-multi.txt
  92 # RUN: echo "_GLOBAL_OFFSET_TABLE_" >> %t-order-multi.txt
  93 # RUN: echo "_start" >> %t-order-multi.txt
  94 # RUN: ld.lld %t1.o %t3.o %t.so -o %t --symbol-ordering-file %t-order-multi.txt --gc-sections -T %t.script \
  95 # RUN:   2>&1 | FileCheck %s --check-prefixes=WARN,SAMESYM,ABSOLUTE,SHARED,UNDEFINED,GC,DISCARD,MISSING2,SYNTHETIC
  96
  97 # WARN-NOT:    warning:
  98 # SAMESYM:     warning: {{.*}}.txt: duplicate ordered symbol: _start
  99 # WARN-NOT:    warning:
 100 # SHARED:      warning: {{.*}}.so: unable to order shared symbol: shared
 101 # WARN-NOT:    warning:
 102 # DISCARD:     warning: {{.*}}1.o: unable to order discarded symbol: discard
 103 # WARN-NOT:    warning:
 104 # GC:          warning: {{.*}}1.o: unable to order discarded symbol: gc
 105 # WARN-NOT:    warning:
 106 # SYNTHETIC:   warning: <internal>: unable to order synthetic symbol: _GLOBAL_OFFSET_TABLE_
 107 # WARN-NOT:    warning:
 108 # UNDEFINED:   warning: {{.*}}3.o: unable to order undefined symbol: undefined
 109 # WARN-NOT:    warning:
 110 # ABSOLUTE:    warning: {{.*}}1.o: unable to order absolute symbol: absolute
 111 # WARN-NOT:    warning:
 112 # MISSING:     warning: symbol ordering file: no such symbol: missing
 113 # WARN-NOT:    warning:
 114 # MISSING2:    warning: symbol ordering file: no such symbol: missing_sym
 115 # WARN-NOT:    warning:
 116 # COMDAT:      warning: {{.*}}1.o: unable to order discarded symbol: comdat
 117 # WARN-NOT:    warning:
 118 # MULTI:       warning: {{.*}}2.o: unable to order absolute symbol: multi
 119 # WARN-NOT:    warning:
 120
 121 .section .text._start,"ax",@progbits
 122 .global _start
 123 _start:
 124   movq  %rax, absolute
 125   callq shared
 126
 127 absolute = 0x1234
 128
 129 .section .text.comdat,"axG",@progbits,comdat,comdat
 130 .weak comdat
 131 comdat:
 132   nop
 133
 134 .section .text.discard,"ax",@progbits
 135 .global discard
 136 discard:
 137   nop
 138
 139 .section .text.gc,"ax",@progbits
 140 .global gc
 141 gc:
 142   nop
 143
 144 .section .text.glob_or_wk,"ax",@progbits
 145 .weak glob_or_wk
 146 glob_or_wk:
 147   nop
 148
 149 .section .text.icf1,"ax",@progbits
 150 .global icf1
 151 icf1:
 152     ret
 153
 154 .section .text.icf2,"ax",@progbits
 155 .global icf2
 156 icf2:
 157     ret
 158
 159 # This is a "good" instance of the symbol
 160 .section .text.multi,"ax",@progbits
 161 multi:
 162   .quad _GLOBAL_OFFSET_TABLE_