[dwarfdump] Improve -diff option by hiding more.

[JDevlieghere]

Summary

The -diff option makes it easy to diff dwarf by hiding addresses and offsets. However not all of them were hidden, which should be fixed by this patch.

[aprantl]

Thanks, this will be very useful.

llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp

410 ↗

(On Diff #163709)

Can using two different streams cause the output to go out of sync due to buffering?

[JDevlieghere]

llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp

410 ↗

(On Diff #163709)

It's either the same stream or null, so shouldn't pose a problem.

llvm/trunk/lib/DebugInfo/DWARF/DWARFDie.cpp

else if (Attr == DW_AT_high_pc && !DumpOpts.ShowForm && !DumpOpts.Verbose &&
     }
   } else if (Attr == DW_AT_location || Attr == DW_AT_frame_base ||
              Attr == DW_AT_data_member_location ||
              Attr == DW_AT_GNU_call_site_value)
     dumpLocation(OS, formValue, U, sizeof(BaseIndent) + Indent + 4, DumpOpts);
   else
     formValue.dump(OS, DumpOpts);
 
+  std::string Space = DumpOpts.ShowAddresses ? " " : "";
+
   // We have dumped the attribute raw value. For some attributes
   // having both the raw value and the pretty-printed value is
   // interesting. These attributes are handled below.
   if (Attr == DW_AT_specification || Attr == DW_AT_abstract_origin) {
     if (const char *Name = Die.getAttributeValueAsReferencedDie(Attr).getName(
             DINameKind::LinkageName))
-      OS << " \"" << Name << '\"';
+      OS << Space << "\"" << Name << '\"';
   } else if (Attr == DW_AT_type) {
-    OS << " \"";
+    OS << Space << "\"";
     dumpTypeName(OS, Die);
     OS << '"';
   } else if (Attr == DW_AT_APPLE_property_attribute) {
     if (Optional<uint64_t> OptVal = formValue.getAsUnsignedConstant())
       dumpApplePropertyAttribute(OS, *OptVal);
   } else if (Attr == DW_AT_ranges) {
     const DWARFObject &Obj = Die.getDwarfUnit()->getContext().getDWARFObj();
     // For DW_FORM_rnglistx we need to dump the offset separately, since

llvm/trunk/lib/DebugInfo/DWARF/DWARFFormValue.cpp

void DWARFFormValue::dump(raw_ostream &OS, DIDumpOptions DumpOpts) const {
   case DW_FORM_block:
   case DW_FORM_block1:
   case DW_FORM_block2:
   case DW_FORM_block4:
     if (UValue > 0) {
       switch (Form) {
       case DW_FORM_exprloc:
       case DW_FORM_block:
-        OS << format("<0x%" PRIx64 "> ", UValue);
+        AddrOS << format("<0x%" PRIx64 "> ", UValue);
         break;
       case DW_FORM_block1:
-        OS << format("<0x%2.2x> ", (uint8_t)UValue);
+        AddrOS << format("<0x%2.2x> ", (uint8_t)UValue);
         break;
       case DW_FORM_block2:
-        OS << format("<0x%4.4x> ", (uint16_t)UValue);
+        AddrOS << format("<0x%4.4x> ", (uint16_t)UValue);
         break;
       case DW_FORM_block4:
-        OS << format("<0x%8.8x> ", (uint32_t)UValue);
+        AddrOS << format("<0x%8.8x> ", (uint32_t)UValue);
         break;
       default:
         break;
       }
 
       const uint8_t *DataPtr = Value.data;
       if (DataPtr) {
         // UValue contains size of block
         const uint8_t *EndDataPtr = DataPtr + UValue;
         while (DataPtr < EndDataPtr) {
-          OS << format("%2.2x ", *DataPtr);
+          AddrOS << format("%2.2x ", *DataPtr);
           ++DataPtr;
         }
       } else
         OS << "NULL";
     }
     break;
 
   case DW_FORM_sdata:
void DWARFFormValue::dump(raw_ostream &OS, DIDumpOptions DumpOpts) const {
   default:
     OS << format("DW_FORM(0x%4.4x)", Form);
     break;
   }
 
   if (CURelativeOffset) {
     if (DumpOpts.Verbose)
       OS << " => {";
+    if (DumpOpts.ShowAddresses)
       WithColor(OS, HighlightColor::Address).get()
           << format("0x%8.8" PRIx64, UValue + (U ? U->getOffset() : 0));
     if (DumpOpts.Verbose)
       OS << "}";
   }
 }
 
 void DWARFFormValue::dumpString(raw_ostream &OS) const {
   Optional<const char *> DbgStr = getAsCString();
   if (DbgStr.hasValue()) {

llvm/trunk/test/tools/llvm-dwarfdump/X86/DW_AT_object_pointer.s

+# RUN: llvm-mc %s -filetype obj -triple x86_64-apple-darwin -o %t.o
+# RUN: llvm-dwarfdump -diff %t.o | FileCheck %s
+
+# CHECK: DW_AT_type ("A*")
+# CHECK: DW_AT_specification ("A")
+# CHECK: DW_AT_object_pointer ()
+
+  .section  __TEXT,__text,regular,pure_instructions
+  .globl  __Z3fooi                ## -- Begin function _Z3fooi
+  .p2align  4, 0x90
+__Z3fooi:
+Lfunc_begin0:
+Ltmp0:
+Ltmp1:
+Lfunc_end0:
+__ZN1AC1Ev:
+Lfunc_begin1:
+Ltmp2:
+Ltmp3:
+Lfunc_end1:
+__ZN1AC2Ev:
+Lfunc_begin2:
+Ltmp4:
+Ltmp5:
+Lfunc_end2:
+                                        ## -- End function
+  .section  __DWARF,__debug_str,regular,debug
+Linfo_string:
+  .asciz  "clang version 3.2 (trunk 163586) (llvm/trunk 163570)" ## string offset=0
+  .asciz  "bar.cpp"               ## string offset=53
+  .asciz  "/Users/echristo/debug-tests" ## string offset=61
+  .asciz  "foo"                   ## string offset=89
+  .asciz  "_Z3fooi"               ## string offset=93
+  .asciz  "A"                     ## string offset=101
+  .asciz  "m_a"                   ## string offset=103
+  .asciz  "int"                   ## string offset=107
+  .asciz  "_ZN1AC1Ev"             ## string offset=111
+  .asciz  "_ZN1AC2Ev"             ## string offset=121
+  .asciz  "a"                     ## string offset=131
+  .asciz  "this"                  ## string offset=133
+  .section  __DWARF,__debug_abbrev,regular,debug
+Lsection_abbrev:
+  .byte 1                       ## Abbreviation Code
+  .byte 17                      ## DW_TAG_compile_unit
+  .byte 1                       ## DW_CHILDREN_yes
+  .byte 37                      ## DW_AT_producer
+  .byte 14                      ## DW_FORM_strp
+  .byte 19                      ## DW_AT_language
+  .byte 5                       ## DW_FORM_data2
+  .byte 3                       ## DW_AT_name
+  .byte 14                      ## DW_FORM_strp
+  .byte 16                      ## DW_AT_stmt_list
+  .byte 23                      ## DW_FORM_sec_offset
+  .byte 27                      ## DW_AT_comp_dir
+  .byte 14                      ## DW_FORM_strp
+  .byte 17                      ## DW_AT_low_pc
+  .byte 1                       ## DW_FORM_addr
+  .byte 18                      ## DW_AT_high_pc
+  .byte 6                       ## DW_FORM_data4
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 2                       ## Abbreviation Code
+  .byte 46                      ## DW_TAG_subprogram
+  .byte 1                       ## DW_CHILDREN_yes
+  .byte 17                      ## DW_AT_low_pc
+  .byte 1                       ## DW_FORM_addr
+  .byte 18                      ## DW_AT_high_pc
+  .byte 6                       ## DW_FORM_data4
+  .ascii  "\347\177"              ## DW_AT_APPLE_omit_frame_ptr
+  .byte 25                      ## DW_FORM_flag_present
+  .byte 64                      ## DW_AT_frame_base
+  .byte 24                      ## DW_FORM_exprloc
+  .byte 110                     ## DW_AT_linkage_name
+  .byte 14                      ## DW_FORM_strp
+  .byte 3                       ## DW_AT_name
+  .byte 14                      ## DW_FORM_strp
+  .byte 58                      ## DW_AT_decl_file
+  .byte 11                      ## DW_FORM_data1
+  .byte 59                      ## DW_AT_decl_line
+  .byte 11                      ## DW_FORM_data1
+  .byte 73                      ## DW_AT_type
+  .byte 19                      ## DW_FORM_ref4
+  .byte 63                      ## DW_AT_external
+  .byte 25                      ## DW_FORM_flag_present
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 3                       ## Abbreviation Code
+  .byte 5                       ## DW_TAG_formal_parameter
+  .byte 0                       ## DW_CHILDREN_no
+  .byte 2                       ## DW_AT_location
+  .byte 24                      ## DW_FORM_exprloc
+  .byte 58                      ## DW_AT_decl_file
+  .byte 11                      ## DW_FORM_data1
+  .byte 59                      ## DW_AT_decl_line
+  .byte 11                      ## DW_FORM_data1
+  .byte 73                      ## DW_AT_type
+  .byte 19                      ## DW_FORM_ref4
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 4                       ## Abbreviation Code
+  .byte 11                      ## DW_TAG_lexical_block
+  .byte 1                       ## DW_CHILDREN_yes
+  .byte 17                      ## DW_AT_low_pc
+  .byte 1                       ## DW_FORM_addr
+  .byte 18                      ## DW_AT_high_pc
+  .byte 6                       ## DW_FORM_data4
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 5                       ## Abbreviation Code
+  .byte 52                      ## DW_TAG_variable
+  .byte 0                       ## DW_CHILDREN_no
+  .byte 2                       ## DW_AT_location
+  .byte 24                      ## DW_FORM_exprloc
+  .byte 3                       ## DW_AT_name
+  .byte 14                      ## DW_FORM_strp
+  .byte 58                      ## DW_AT_decl_file
+  .byte 11                      ## DW_FORM_data1
+  .byte 59                      ## DW_AT_decl_line
+  .byte 11                      ## DW_FORM_data1
+  .byte 73                      ## DW_AT_type
+  .byte 19                      ## DW_FORM_ref4
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 6                       ## Abbreviation Code
+  .byte 2                       ## DW_TAG_class_type
+  .byte 1                       ## DW_CHILDREN_yes
+  .byte 3                       ## DW_AT_name
+  .byte 14                      ## DW_FORM_strp
+  .byte 11                      ## DW_AT_byte_size
+  .byte 11                      ## DW_FORM_data1
+  .byte 58                      ## DW_AT_decl_file
+  .byte 11                      ## DW_FORM_data1
+  .byte 59                      ## DW_AT_decl_line
+  .byte 11                      ## DW_FORM_data1
+  .ascii  "\210\001"              ## DW_AT_alignment
+  .byte 15                      ## DW_FORM_udata
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 7                       ## Abbreviation Code
+  .byte 13                      ## DW_TAG_member
+  .byte 0                       ## DW_CHILDREN_no
+  .byte 3                       ## DW_AT_name
+  .byte 14                      ## DW_FORM_strp
+  .byte 73                      ## DW_AT_type
+  .byte 19                      ## DW_FORM_ref4
+  .byte 58                      ## DW_AT_decl_file
+  .byte 11                      ## DW_FORM_data1
+  .byte 59                      ## DW_AT_decl_line
+  .byte 11                      ## DW_FORM_data1
+  .ascii  "\210\001"              ## DW_AT_alignment
+  .byte 15                      ## DW_FORM_udata
+  .byte 56                      ## DW_AT_data_member_location
+  .byte 11                      ## DW_FORM_data1
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 8                       ## Abbreviation Code
+  .byte 46                      ## DW_TAG_subprogram
+  .byte 1                       ## DW_CHILDREN_yes
+  .byte 3                       ## DW_AT_name
+  .byte 14                      ## DW_FORM_strp
+  .byte 58                      ## DW_AT_decl_file
+  .byte 11                      ## DW_FORM_data1
+  .byte 59                      ## DW_AT_decl_line
+  .byte 11                      ## DW_FORM_data1
+  .byte 60                      ## DW_AT_declaration
+  .byte 25                      ## DW_FORM_flag_present
+  .byte 63                      ## DW_AT_external
+  .byte 25                      ## DW_FORM_flag_present
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 9                       ## Abbreviation Code
+  .byte 5                       ## DW_TAG_formal_parameter
+  .byte 0                       ## DW_CHILDREN_no
+  .byte 73                      ## DW_AT_type
+  .byte 19                      ## DW_FORM_ref4
+  .byte 52                      ## DW_AT_artificial
+  .byte 25                      ## DW_FORM_flag_present
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 10                      ## Abbreviation Code
+  .byte 36                      ## DW_TAG_base_type
+  .byte 0                       ## DW_CHILDREN_no
+  .byte 3                       ## DW_AT_name
+  .byte 14                      ## DW_FORM_strp
+  .byte 62                      ## DW_AT_encoding
+  .byte 11                      ## DW_FORM_data1
+  .byte 11                      ## DW_AT_byte_size
+  .byte 11                      ## DW_FORM_data1
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 11                      ## Abbreviation Code
+  .byte 15                      ## DW_TAG_pointer_type
+  .byte 0                       ## DW_CHILDREN_no
+  .byte 73                      ## DW_AT_type
+  .byte 19                      ## DW_FORM_ref4
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 12                      ## Abbreviation Code
+  .byte 46                      ## DW_TAG_subprogram
+  .byte 1                       ## DW_CHILDREN_yes
+  .byte 17                      ## DW_AT_low_pc
+  .byte 1                       ## DW_FORM_addr
+  .byte 18                      ## DW_AT_high_pc
+  .byte 6                       ## DW_FORM_data4
+  .ascii  "\347\177"              ## DW_AT_APPLE_omit_frame_ptr
+  .byte 25                      ## DW_FORM_flag_present
+  .byte 64                      ## DW_AT_frame_base
+  .byte 24                      ## DW_FORM_exprloc
+  .byte 100                     ## DW_AT_object_pointer
+  .byte 19                      ## DW_FORM_ref4
+  .byte 110                     ## DW_AT_linkage_name
+  .byte 14                      ## DW_FORM_strp
+  .byte 71                      ## DW_AT_specification
+  .byte 19                      ## DW_FORM_ref4
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 13                      ## Abbreviation Code
+  .byte 5                       ## DW_TAG_formal_parameter
+  .byte 0                       ## DW_CHILDREN_no
+  .byte 2                       ## DW_AT_location
+  .byte 24                      ## DW_FORM_exprloc
+  .byte 3                       ## DW_AT_name
+  .byte 14                      ## DW_FORM_strp
+  .byte 58                      ## DW_AT_decl_file
+  .byte 11                      ## DW_FORM_data1
+  .byte 59                      ## DW_AT_decl_line
+  .byte 11                      ## DW_FORM_data1
+  .byte 73                      ## DW_AT_type
+  .byte 19                      ## DW_FORM_ref4
+  .byte 52                      ## DW_AT_artificial
+  .byte 25                      ## DW_FORM_flag_present
+  .byte 0                       ## EOM(1)
+  .byte 0                       ## EOM(2)
+  .byte 0                       ## EOM(3)
+  .section  __DWARF,__debug_info,regular,debug
+Lsection_info:
+Lcu_begin0:
+  .long 244                     ## Length of Unit
+  .short  4                       ## DWARF version number
+.set Lset0, Lsection_abbrev-Lsection_abbrev ## Offset Into Abbrev. Section
+  .long Lset0
+  .byte 8                       ## Address Size (in bytes)
+  .byte 1                       ## Abbrev [1] 0xb:0xed DW_TAG_compile_unit
+  .long 0                       ## DW_AT_producer
+  .short  4                       ## DW_AT_language
+  .long 53                      ## DW_AT_name
+.set Lset1, Lline_table_start0-Lsection_line ## DW_AT_stmt_list
+  .long Lset1
+  .long 61                      ## DW_AT_comp_dir
+  .quad Lfunc_begin0            ## DW_AT_low_pc
+.set Lset2, Lfunc_end2-Lfunc_begin0     ## DW_AT_high_pc
+  .long Lset2
+  .byte 2                       ## Abbrev [2] 0x2a:0x44 DW_TAG_subprogram
+  .quad Lfunc_begin0            ## DW_AT_low_pc
+.set Lset3, Lfunc_end0-Lfunc_begin0     ## DW_AT_high_pc
+  .long Lset3
+                                        ## DW_AT_APPLE_omit_frame_ptr
+  .byte 1                       ## DW_AT_frame_base
+  .byte 87
+  .long 93                      ## DW_AT_linkage_name
+  .long 89                      ## DW_AT_name
+  .byte 1                       ## DW_AT_decl_file
+  .byte 7                       ## DW_AT_decl_line
+  .long 146                     ## DW_AT_type
+                                        ## DW_AT_external
+  .byte 3                       ## Abbrev [3] 0x47:0xa DW_TAG_formal_parameter
+  .byte 2                       ## DW_AT_location
+  .byte 145
+  .byte 4
+  .byte 1                       ## DW_AT_decl_file
+  .byte 7                       ## DW_AT_decl_line
+  .long 146                     ## DW_AT_type
+  .byte 4                       ## Abbrev [4] 0x51:0x1c DW_TAG_lexical_block
+  .quad Ltmp0                   ## DW_AT_low_pc
+.set Lset4, Ltmp1-Ltmp0                 ## DW_AT_high_pc
+  .long Lset4
+  .byte 5                       ## Abbrev [5] 0x5e:0xe DW_TAG_variable
+  .byte 2                       ## DW_AT_location
+  .byte 145
+  .byte 0
+  .long 131                     ## DW_AT_name
+  .byte 1                       ## DW_AT_decl_file
+  .byte 8                       ## DW_AT_decl_line
+  .long 110                     ## DW_AT_type
+  .byte 0                       ## End Of Children Mark
+  .byte 0                       ## End Of Children Mark
+  .byte 6                       ## Abbrev [6] 0x6e:0x24 DW_TAG_class_type
+  .long 101                     ## DW_AT_name
+  .byte 4                       ## DW_AT_byte_size
+  .byte 1                       ## DW_AT_decl_file
+  .byte 1                       ## DW_AT_decl_line
+  .byte 4                       ## DW_AT_alignment
+  .byte 7                       ## Abbrev [7] 0x77:0xd DW_TAG_member
+  .long 103                     ## DW_AT_name
+  .long 146                     ## DW_AT_type
+  .byte 1                       ## DW_AT_decl_file
+  .byte 4                       ## DW_AT_decl_line
+  .byte 4                       ## DW_AT_alignment
+  .byte 0                       ## DW_AT_data_member_location
+  .byte 8                       ## Abbrev [8] 0x84:0xd DW_TAG_subprogram
+  .long 101                     ## DW_AT_name
+  .byte 1                       ## DW_AT_decl_file
+  .byte 3                       ## DW_AT_decl_line
+                                        ## DW_AT_declaration
+                                        ## DW_AT_external
+  .byte 9                       ## Abbrev [9] 0x8b:0x5 DW_TAG_formal_parameter
+  .long 153                     ## DW_AT_type
+                                        ## DW_AT_artificial
+  .byte 0                       ## End Of Children Mark
+  .byte 0                       ## End Of Children Mark
+  .byte 10                      ## Abbrev [10] 0x92:0x7 DW_TAG_base_type
+  .long 107                     ## DW_AT_name
+  .byte 5                       ## DW_AT_encoding
+  .byte 4                       ## DW_AT_byte_size
+  .byte 11                      ## Abbrev [11] 0x99:0x5 DW_TAG_pointer_type
+  .long 110                     ## DW_AT_type
+  .byte 12                      ## Abbrev [12] 0x9e:0x2a DW_TAG_subprogram
+  .quad Lfunc_begin1            ## DW_AT_low_pc
+.set Lset5, Lfunc_end1-Lfunc_begin1     ## DW_AT_high_pc
+  .long Lset5
+                                        ## DW_AT_APPLE_omit_frame_ptr
+  .byte 1                       ## DW_AT_frame_base
+  .byte 87
+  .long 185                     ## DW_AT_object_pointer
+  .long 111                     ## DW_AT_linkage_name
+  .long 132                     ## DW_AT_specification
+  .byte 13                      ## Abbrev [13] 0xb9:0xe DW_TAG_formal_parameter
+  .byte 2                       ## DW_AT_location
+  .byte 145
+  .byte 0
+  .long 133                     ## DW_AT_name
+  .byte 1                       ## DW_AT_decl_file
+  .byte 3                       ## DW_AT_decl_line
+  .long 242                     ## DW_AT_type
+                                        ## DW_AT_artificial
+  .byte 0                       ## End Of Children Mark
+  .byte 12                      ## Abbrev [12] 0xc8:0x2a DW_TAG_subprogram
+  .quad Lfunc_begin2            ## DW_AT_low_pc
+.set Lset6, Lfunc_end2-Lfunc_begin2     ## DW_AT_high_pc
+  .long Lset6
+                                        ## DW_AT_APPLE_omit_frame_ptr
+  .byte 1                       ## DW_AT_frame_base
+  .byte 87
+  .long 227                     ## DW_AT_object_pointer
+  .long 121                     ## DW_AT_linkage_name
+  .long 132                     ## DW_AT_specification
+  .byte 13                      ## Abbrev [13] 0xe3:0xe DW_TAG_formal_parameter
+  .byte 2                       ## DW_AT_location
+  .byte 145
+  .byte 120
+  .long 133                     ## DW_AT_name
+  .byte 1                       ## DW_AT_decl_file
+  .byte 3                       ## DW_AT_decl_line
+  .long 242                     ## DW_AT_type
+                                        ## DW_AT_artificial
+  .byte 0                       ## End Of Children Mark
+  .byte 11                      ## Abbrev [11] 0xf2:0x5 DW_TAG_pointer_type
+  .long 110                     ## DW_AT_type
+  .byte 0                       ## End Of Children Mark
+  .section  __DWARF,__debug_macinfo,regular,debug
+Ldebug_macinfo:
+  .byte 0                       ## End Of Macro List Mark
+  .section  __DWARF,__apple_names,regular,debug
+Lnames_begin:
+  .long 1212240712              ## Header Magic
+  .short  1                       ## Header Version
+  .short  0                       ## Header Hash Function
+  .long 5                       ## Header Bucket Count
+  .long 5                       ## Header Hash Count
+  .long 12                      ## Header Data Length
+  .long 0                       ## HeaderData Die Offset Base
+  .long 1                       ## HeaderData Atom Count
+  .short  1                       ## DW_ATOM_die_offset
+  .short  6                       ## DW_FORM_data4
+  .long 0                       ## Bucket 0
+  .long 2                       ## Bucket 1
+  .long -1                      ## Bucket 2
+  .long 3                       ## Bucket 3
+  .long 4                       ## Bucket 4
+  .long 649621230               ## Hash in Bucket 0
+  .long 1784752350              ## Hash in Bucket 0
+  .long 649620141               ## Hash in Bucket 1
+  .long 177638                  ## Hash in Bucket 3
+  .long 193491849               ## Hash in Bucket 4
+.set Lset7, LNames4-Lnames_begin        ## Offset in Bucket 0
+  .long Lset7
+.set Lset8, LNames3-Lnames_begin        ## Offset in Bucket 0
+  .long Lset8
+.set Lset9, LNames2-Lnames_begin        ## Offset in Bucket 1
+  .long Lset9
+.set Lset10, LNames0-Lnames_begin       ## Offset in Bucket 3
+  .long Lset10
+.set Lset11, LNames1-Lnames_begin       ## Offset in Bucket 4
+  .long Lset11
+LNames4:
+  .long 121                     ## _ZN1AC2Ev
+  .long 1                       ## Num DIEs
+  .long 200
+  .long 0
+LNames3:
+  .long 93                      ## _Z3fooi
+  .long 1                       ## Num DIEs
+  .long 42
+  .long 0
+LNames2:
+  .long 111                     ## _ZN1AC1Ev
+  .long 1                       ## Num DIEs
+  .long 158
+  .long 0
+LNames0:
+  .long 101                     ## A
+  .long 2                       ## Num DIEs
+  .long 158
+  .long 200
+  .long 0
+LNames1:
+  .long 89                      ## foo
+  .long 1                       ## Num DIEs
+  .long 42
+  .long 0
+  .section  __DWARF,__apple_objc,regular,debug
+Lobjc_begin:
+  .long 1212240712              ## Header Magic
+  .short  1                       ## Header Version
+  .short  0                       ## Header Hash Function
+  .long 1                       ## Header Bucket Count
+  .long 0                       ## Header Hash Count
+  .long 12                      ## Header Data Length
+  .long 0                       ## HeaderData Die Offset Base
+  .long 1                       ## HeaderData Atom Count
+  .short  1                       ## DW_ATOM_die_offset
+  .short  6                       ## DW_FORM_data4
+  .long -1                      ## Bucket 0
+  .section  __DWARF,__apple_namespac,regular,debug
+Lnamespac_begin:
+  .long 1212240712              ## Header Magic
+  .short  1                       ## Header Version
+  .short  0                       ## Header Hash Function
+  .long 1                       ## Header Bucket Count
+  .long 0                       ## Header Hash Count
+  .long 12                      ## Header Data Length
+  .long 0                       ## HeaderData Die Offset Base
+  .long 1                       ## HeaderData Atom Count
+  .short  1                       ## DW_ATOM_die_offset
+  .short  6                       ## DW_FORM_data4
+  .long -1                      ## Bucket 0
+  .section  __DWARF,__apple_types,regular,debug
+Ltypes_begin:
+  .long 1212240712              ## Header Magic
+  .short  1                       ## Header Version
+  .short  0                       ## Header Hash Function
+  .long 2                       ## Header Bucket Count
+  .long 2                       ## Header Hash Count
+  .long 20                      ## Header Data Length
+  .long 0                       ## HeaderData Die Offset Base
+  .long 3                       ## HeaderData Atom Count
+  .short  1                       ## DW_ATOM_die_offset
+  .short  6                       ## DW_FORM_data4
+  .short  3                       ## DW_ATOM_die_tag
+  .short  5                       ## DW_FORM_data2
+  .short  4                       ## DW_ATOM_type_flags
+  .short  11                      ## DW_FORM_data1
+  .long 0                       ## Bucket 0
+  .long -1                      ## Bucket 1
+  .long 177638                  ## Hash in Bucket 0
+  .long 193495088               ## Hash in Bucket 0
+.set Lset12, Ltypes0-Ltypes_begin       ## Offset in Bucket 0
+  .long Lset12
+.set Lset13, Ltypes1-Ltypes_begin       ## Offset in Bucket 0
+  .long Lset13
+Ltypes0:
+  .long 101                     ## A
+  .long 1                       ## Num DIEs
+  .long 110
+  .short  2
+  .byte 0
+  .long 0
+Ltypes1:
+  .long 107                     ## int
+  .long 1                       ## Num DIEs
+  .long 146
+  .short  36
+  .byte 0
+  .long 0
+
+.subsections_via_symbols
+  .section  __DWARF,__debug_line,regular,debug
+Lsection_line:
+Lline_table_start0: