1; RUN: llc -mtriple=x86_64-unknown-linux-gnu -filetype=obj < %s | llvm-dwarfdump -v - \ 2; RUN: | FileCheck --check-prefix=MONOLITHIC %s 3; RUN: llc -mtriple=x86_64-unknown-linux-gnu -split-dwarf-file=foo.dwo -filetype=obj < %s \ 4; RUN: | llvm-dwarfdump -v - | FileCheck --check-prefix=SPLIT %s 5 6; This basic test checks the emission of a DWARF v5 string offsets table in 7; the split and non-split (monolithic) scenario. 8; 9; Constructed from the following source with 10; clang -S -emit-llvm -gdwarf-5 11; 12; enum E {a, b, c}; 13; E glob; 14; 15; In the non-split scenario, check the DW_AT_str_offsets_base attribute 16; in .debug_abbrev. 17; MONOLITHIC: .debug_abbrev contents: 18; MONOLITHIC-NOT: contents: 19; MONOLITHIC: DW_TAG_compile_unit 20; MONOLITHIC-NOT: DW_TAG 21; MONOLITHIC: DW_AT_str_offsets_base DW_FORM_sec_offset 22 23; Check that indexed strings come out correctly and that the DW_str_offsets_base attribute 24; is there and has the right value. 25; MONOLITHIC: .debug_info contents: 26; MONOLITHIC-NOT: contents: 27; MONOLITHIC: DW_TAG_compile_unit 28; MONOLITHIC-NOT: {{DW_TAG|NULL}} 29; MONOLITHIC: DW_AT_producer [DW_FORM_strx1] (indexed (00000000) string = "clang{{.*}}") 30; MONOLITHIC-NOT: {{DW_TAG|NULL}} 31; MONOLITHIC: DW_AT_str_offsets_base [DW_FORM_sec_offset] (0x00000008) 32; MONOLITHIC-NOT: {{DW_TAG|NULL}} 33; MONOLITHIC: DW_AT_comp_dir [DW_FORM_strx1] (indexed (00000002) string = "/home/{{.*}}") 34 35; Extract the string offsets from the .debug_str section so we can check that 36; they are referenced correctly in the .debug_str_offsets section. 37; MONOLITHIC: .debug_str contents: 38; MONOLITHIC-NEXT: 0x00000000: 39; MONOLITHIC-NEXT: 0x[[STRING2:[0-9a-f]]] 40; MONOLITHIC-NEXT: 0x[[STRING3:[0-9a-f]]] 41; MONOLITHIC-NEXT: 0x[[STRING4:[0-9a-f]]] 42 43; Verify that the .debug_str_offsets section is there and that it starts 44; with an 8-byte header, followed by offsets into the .debug_str section. 45; MONOLITHIC: .debug_str_offsets contents: 46; MONOLITHIC-NEXT: Contribution size = 36, Format = DWARF32, Version = 5 47; MONOLITHIC-NEXT: 0x00000008: 00000000 48; MONOLITHIC-NEXT: 0x0000000c: [[STRING2]] 49; MONOLITHIC-NEXT: 0x00000010: [[STRING3]] 50; MONOLITHIC-NEXT: 0x00000014: [[STRING4]] 51 52; For split dwarf, verify that the skeleton unit has the DW_AT_str_offsets_base 53; attribute and that it has the right value. 54; 55; SPLIT: .debug_info contents: 56; SPLIT-NEXT: 0x00000000: Compile Unit:{{.*}}DW_UT_skeleton 57; SPLIT-NOT: contents: 58; SPLIT: DW_TAG_skeleton_unit 59; SPLIT-NOT: {{DW_TAG|contents:}} 60; SPLIT: DW_AT_str_offsets_base [DW_FORM_sec_offset] (0x00000008) 61; SPLIT: DW_AT_comp_dir [DW_FORM_strx1] (indexed (00000000) string = "/home/test") 62; SPLIT: DW_AT_dwo_name [DW_FORM_strx1] (indexed (00000001) string = "foo.dwo") 63 64; Check for the split CU in .debug_info.dwo. 65; SPLIT: .debug_info.dwo contents: 66; SPLIT-NEXT: 0x00000000: Compile Unit:{{.*}}DW_UT_split_compile 67; SPLIT-NOT: contents: 68; SPLIT: DW_TAG_compile_unit 69; 70; Check that a couple of indexed strings are displayed correctly and that 71; they have the right format (DW_FORM_strx1). 72; SPLIT-NOT: contents: 73; SPLIT: DW_TAG_enumerator 74; SPLIT-NOT: {{DW_TAG|NULL}} 75; SPLIT: DW_AT_name [DW_FORM_strx1] (indexed (00000001) string = "a") 76; SPLIT-NOT: contents: 77; SPLIT: DW_TAG_enumerator 78; SPLIT-NOT: {{DW_TAG|NULL}} 79; SPLIT: DW_AT_name [DW_FORM_strx1] (indexed (00000002) string = "b") 80; 81; Extract the string offsets referenced in the main file by the skeleton unit. 82; SPLIT: .debug_str contents: 83; SPLIT-NEXT: 0x[[STRHOMETESTSPLIT:[0-9a-f]*]]: "/home/test" 84; SPLIT-NEXT: 0x[[STRESPLIT:[0-9a-f]*]]: "E" 85; SPLIT-NEXT: 0x[[STRGLOBSPLIT:[0-9a-f]*]]: "glob" 86; SPLIT-NEXT: 0x[[STRFOODWOSPLIT:[0-9a-f]*]]: "foo.dwo" 87; 88; Extract the string offsets referenced in the .dwo file by the split unit. 89; SPLIT: .debug_str.dwo contents: 90; SPLIT-NEXT: 0x00000000:{{.*}} 91; SPLIT-NEXT: 0x[[STRING2DWO:[0-9a-f]*]]{{.*}} 92; SPLIT-NEXT: 0x[[STRING3DWO:[0-9a-f]*]]{{.*}} 93; 94; Check the string offsets sections in both the main and the .dwo files and 95; verify that the extracted string offsets are referenced correctly. The 96; sections should contain only the offsets of strings that are actually 97; referenced by the debug info. 98; SPLIT: .debug_str_offsets contents: 99; SPLIT-NEXT: 0x00000000: Contribution size = 12, Format = DWARF32, Version = 5 100; SPLIT-NEXT: 0x00000008: [[STRHOMETESTSPLIT]] "/home/test" 101; SPLIT-NEXT: 0x0000000c: [[STRFOODWOSPLIT]] "foo.dwo" 102; SPLIT-EMPTY: 103 104; SPLIT: .debug_str_offsets.dwo contents: 105; SPLIT-NEXT: 0x00000000: Contribution size = 36, Format = DWARF32, Version = 5 106; SPLIT-NEXT: 0x00000008: 00000000{{.*}} 107; SPLIT-NEXT: 0x0000000c: [[STRING2DWO]]{{.*}} 108; SPLIT-NEXT: 0x00000010: [[STRING3DWO]] 109 110@glob = global i32 0, align 4, !dbg !0 111 112!llvm.dbg.cu = !{!2} 113!llvm.module.flags = !{!11, !12, !13} 114!llvm.ident = !{!14} 115 116!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 117!1 = distinct !DIGlobalVariable(name: "glob", scope: !2, file: !3, line: 3, type: !5, isLocal: false, isDefinition: true) 118!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 7.0.0 (trunk 322415)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !10) 119!3 = !DIFile(filename: "en.cpp", directory: "/home/test", checksumkind: CSK_MD5, checksum: "d96b2e2d618e550f0ddd0b6a49c98b02") 120!4 = !{!5} 121!5 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "E", file: !3, line: 1, size: 32, elements: !6, identifier: "_ZTS1E") 122!6 = !{!7, !8, !9} 123!7 = !DIEnumerator(name: "a", value: 0) 124!8 = !DIEnumerator(name: "b", value: 1) 125!9 = !DIEnumerator(name: "c", value: 2) 126!10 = !{!0} 127!11 = !{i32 2, !"Dwarf Version", i32 5} 128!12 = !{i32 2, !"Debug Info Version", i32 3} 129!13 = !{i32 1, !"wchar_size", i32 4} 130!14 = !{!"clang version 7.0.0 (trunk 322415)"} 131