llvm/test/tools/dsymutil/X86/dead-stripped.cpp

   1 // RUN: dsymutil -f -y %p/dummy-debug-map.map -oso-prepend-path %p/../Inputs/dead-stripped -o - | llvm-dwarfdump - --debug-info | FileCheck %s --implicit-check-not "{{DW_AT_low_pc|DW_AT_high_pc|DW_AT_location|DW_TAG|NULL}}"
   2
   3 // RUN: dsymutil --linker llvm -f -y %p/dummy-debug-map.map -oso-prepend-path \
   4 // RUN: %p/../Inputs/dead-stripped -o - | llvm-dwarfdump - --debug-info | \
   5 // RUN: FileCheck %s --implicit-check-not \
   6 // RUN: "{{DW_AT_low_pc|DW_AT_high_pc|DW_AT_location|DW_TAG|NULL}}"
   7
   8 // The test was compiled with:
   9 // clang++ -O2 -g -c dead-strip.cpp -o 1.o
  10
  11 // The goal of the test is to exercise dsymutil's behavior in presence of
  12 // functions/variables that have been dead-stripped by the linker but
  13 // that are still present in the linked debug info (in this case because
  14 // they have been DW_TAG_import'd in another namespace).
  15
  16 // Everything in the N namespace below doesn't have a debug map entry, and
  17 // thus is considered dead (::foo() has a debug map entry, otherwise dsymutil
  18 // would just drop the CU altogether).
  19
  20 // CHECK: DW_TAG_compile_unit
  21 // CHECK:   DW_AT_low_pc
  22 // CHECK:   DW_AT_high_pc
  23 // CHECK:   DW_TAG_namespace
  24 namespace N {
  25 int blah = 42;
  26 // CHECK: DW_TAG_variable
  27 // CHECK-NOT: DW_AT_location
  28
  29 __attribute__((always_inline)) int foo() { return blah; }
  30 // CHECK: DW_TAG_subprogram
  31 // CHECK-NOT:  DW_AT_frame_base
  32
  33 // CHECK: DW_TAG_subprogram
  34
  35 int bar(unsigned i) {
  36         int val = foo();
  37         if (i)
  38                 return val + bar(i-1);
  39         return foo();
  40 }
  41 // CHECK: DW_TAG_subprogram
  42 // CHECK-NOT:  DW_AT_frame_base
  43 // CHECK:   DW_TAG_formal_parameter
  44 // CHECK:   DW_TAG_variable
  45 // CHECK:   DW_TAG_inlined_subroutine
  46 // CHECK:   NULL
  47 // CHECK: NULL
  48 }
  49 // CHECK: DW_TAG_base_type
  50 // CHECK: DW_TAG_imported_module
  51 // CHECK: DW_TAG_subprogram
  52 // CHECK:   DW_AT_low_pc
  53 // CHECK:   DW_AT_high_pc
  54 // CHECK: DW_TAG_base_type
  55 // CHECK: NULL
  56
  57 using namespace N;
  58
  59 void foo() {}