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
   2
   3 // The test was compiled with:
   4 // clang++ -O2 -g -c dead-strip.cpp -o 1.o
   5
   6 // The goal of the test is to exercise dsymutil's behavior in presence of
   7 // functions/variables that have been dead-stripped by the linker but
   8 // that are still present in the linked debug info (in this case because
   9 // they have been DW_TAG_import'd in another namespace).
  10
  11 // Everything in the N namespace bellow doesn't have a debug map entry, and
  12 // thus is considered dead (::foo() has a debug map entry, otherwse dsymutil
  13 // would just drop the CU altogether).
  14
  15 namespace N {
  16 int blah = 42;
  17 // This is actually a dsymutil-classic bug that we reproduced
  18 // CHECK: DW_TAG_variable
  19 // CHECK-NOT: DW_TAG
  20 // CHECK: DW_AT_location
  21
  22 __attribute__((always_inline)) int foo() { return blah; }
  23 // CHECK: DW_TAG_subprogram
  24 // CHECK-NOT: DW_AT_low_pc
  25 // CHECK-NOT: DW_AT_high_pc
  26 // CHECK: DW_AT_frame_base
  27
  28 // CHECK: DW_TAG_subprogram
  29
  30 int bar(unsigned i) {
  31         int val = foo();
  32         if (i)
  33                 return val + bar(i-1);
  34         return foo();
  35 }
  36 // CHECK: DW_TAG_subprogram
  37 // CHECK-NOT: DW_AT_low_pc
  38 // CHECK-NOT: DW_AT_high_pc
  39 // CHECK: DW_AT_frame_base
  40 // CHECK-NOT: DW_AT_location
  41 // CHECK-NOT: DW_AT_low_pc
  42 // CHECK-NOT: DW_AT_high_pc
  43
  44 }
  45 // CHECK: TAG_imported_module
  46 using namespace N;
  47
  48 void foo() {}