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a2029fa58e
In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
285 lines
13 KiB
LLVM
285 lines
13 KiB
LLVM
; REQUIRES: object-emission
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; RUN: llc < %s -o %t -filetype=obj -O0 -generate-type-units -mtriple=x86_64-unknown-linux-gnu
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; RUN: llvm-dwarfdump -v %t | FileCheck --check-prefix=CHECK --check-prefix=SINGLE %s
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; RUN: llvm-readobj -s -t %t | FileCheck --check-prefix=OBJ_SINGLE %s
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; RUN: llc < %s -split-dwarf-file=foo.dwo -o %t -filetype=obj -O0 -generate-type-units -mtriple=x86_64-unknown-linux-gnu
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; RUN: llvm-dwarfdump -v %t | FileCheck --check-prefix=CHECK --check-prefix=FISSION %s
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; RUN: llvm-readobj -s -t %t | FileCheck --check-prefix=OBJ_FISSION %s
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; Generated from bar.cpp:
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; #line 1 "bar.h"
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; struct bar {};
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; #line 2 "bar.cpp"
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; struct bar b;
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; void foo(void) {
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; struct baz {};
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; baz b;
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; }
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; namespace echidna {
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; namespace capybara {
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; namespace mongoose {
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; class fluffy {
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; int a;
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; int b;
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; };
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; fluffy animal;
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; }
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; }
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; }
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; namespace {
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; struct walrus {
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; walrus() {}
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; };
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; }
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; walrus w;
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; struct wombat {
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; struct {
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; int a;
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; int b;
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; } a_b;
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; };
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; wombat wom;
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; SINGLE-LABEL: .debug_info contents:
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; FISSION-LABEL: .debug_info.dwo contents:
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; CHECK: Compile Unit: length = [[CU_SIZE:[0-9a-f]+]]
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; CHECK: [[BAR:^0x........]]: DW_TAG_structure_type
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; CHECK-NEXT: DW_AT_declaration
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; CHECK-NEXT: DW_AT_signature {{.*}} (0x1d02f3be30cc5688)
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; CHECK: [[FLUFFY:^0x........]]: DW_TAG_class_type
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; CHECK-NEXT: DW_AT_declaration
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; CHECK-NEXT: DW_AT_signature {{.*}} (0xb04af47397402e77)
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; Ensure the CU-local type 'walrus' is not placed in a type unit.
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; CHECK: [[WALRUS:^0x........]]: DW_TAG_structure_type
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; CHECK-NEXT: DW_AT_name{{.*}}"walrus"
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; CHECK-NEXT: DW_AT_byte_size
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; CHECK-NEXT: DW_AT_decl_file
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; CHECK-NEXT: DW_AT_decl_line
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; CHECK: [[WOMBAT:^0x........]]: DW_TAG_structure_type
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; CHECK-NEXT: DW_AT_declaration
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; CHECK-NEXT: DW_AT_signature {{.*}} (0xfd756cee88f8a118)
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; SINGLE-LABEL: .debug_types contents:
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; FISSION: .debug_types.dwo contents:
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; Check that we generate a hash for bar and the value.
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; CHECK-NOT: type_signature
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; CHECK-LABEL: type_signature = 0x1d02f3be30cc5688
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; CHECK: DW_TAG_structure_type
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; FISSION-NEXT: DW_AT_name {{.*}} ( indexed {{.*}} "bar"
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; SINGLE-NEXT: DW_AT_name {{.*}} "bar"
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; Check that we generate a hash for fluffy and the value.
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; CHECK-NOT: type_signature
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; CHECK-LABEL: type_signature = 0xb04af47397402e77
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; CHECK-NOT: DW_AT_GNU_odr_signature [DW_FORM_data8] (0x9a0124d5a0c21c52)
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; CHECK: DW_TAG_namespace
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; CHECK-NEXT: DW_AT_name{{.*}}"echidna"
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; CHECK: DW_TAG_namespace
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; CHECK-NEXT: DW_AT_name{{.*}}"capybara"
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; CHECK: DW_TAG_namespace
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; CHECK-NEXT: DW_AT_name{{.*}}"mongoose"
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; CHECK: DW_TAG_class_type
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; CHECK-NEXT: DW_AT_name{{.*}}"fluffy"
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; Check that we generate a hash for wombat and the value, but not for the
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; anonymous type contained within.
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; CHECK-NOT: type_signature
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; CHECK-LABEL: type_signature = 0xfd756cee88f8a118
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; CHECK-NOT: DW_AT_GNU_odr_signature [DW_FORM_data8] (0x685bcc220141e9d7)
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; CHECK: DW_TAG_structure_type
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; CHECK-NEXT: DW_AT_name{{.*}}"wombat"
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; CHECK-NOT: type_signature
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; CHECK-LABEL: type_signature = 0xe94f6d3843e62d6b
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; CHECK: DW_TAG_type_unit
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; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
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; CHECK-NOT: NULL
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; CHECK-NOT: DW_AT_GNU_odr_signature
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; CHECK: DW_TAG_structure_type
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; The signature for the outer 'wombat' type
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; CHECK: DW_AT_signature [DW_FORM_ref_sig8] (0xfd756cee88f8a118)
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; CHECK: DW_TAG_structure_type
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; CHECK-NOT: DW_AT_name
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; CHECK-NOT: DW_AT_GNU_odr_signature
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; CHECK: DW_TAG_member
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; CHECK-NEXT: DW_AT_name{{.*}}"a"
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; CHECK-LABEL: .debug_line contents:
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; CHECK: Line table prologue
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; CHECK-NOT: file_names[
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; SINGLE: file_names[
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; SINGLE-NEXT: name: "bar.h"
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; CHECK: file_names[
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; CHECK-NEXT: name: "bar.cpp"
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; CHECK-NOT: file_names[
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; FISSION: .debug_line.dwo contents:
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; CHECK-NOT: .debug_line.dwo contents:
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; FISSION: Line table prologue
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; FISSION: opcode_base: 1
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; FISSION-NOT: standard_opcode_lengths
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; FISSION-NOT: include_directories
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; FISSION-NOT: file_names[
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; FISSION: file_names[
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; FISSION-NEXT: name: "bar.h"
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; FISSION: file_names[
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; FISSION-NEXT: name: "bar.cpp"
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; FISSION-NOT: file_names[
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; CHECK-LABEL: .debug_str contents:
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; Use the unit size as a rough hash/identifier for the unit we're dealing with
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; it happens to be unambiguous at the moment, but it's hardly ideal.
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; CHECK-LABEL: .debug_pubtypes contents:
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; Don't emit pubtype entries for type DIEs in the compile unit that just indirect to a type unit.
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; CHECK-NEXT: unit_size = [[CU_SIZE]]
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; CHECK-NEXT: Offset Name
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; CHECK-DAG: [[BAR]] "bar"
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; CHECK-DAG: [[WALRUS]] "(anonymous namespace)::walrus"
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; CHECK-DAG: [[WOMBAT]] "wombat"
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; CHECK-DAG: [[FLUFFY]] "echidna::capybara::mongoose::fluffy"
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; Make sure debug_types are in comdat groups. This could be more rigid to check
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; that they're the right comdat groups (each type in a separate comdat group,
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; etc)
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; OBJ_SINGLE: Name: .debug_types (
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; OBJ_SINGLE-NOT: }
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; OBJ_SINGLE: SHF_GROUP
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; Fission type units don't go in comdat groups, since their linker is debug
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; aware it's handled using the debug info semantics rather than raw ELF object
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; semantics.
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; OBJ_FISSION: Name: .debug_types.dwo (
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; OBJ_FISSION-NOT: SHF_GROUP
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; OBJ_FISSION: }
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source_filename = "test/DebugInfo/X86/generate-odr-hash.ll"
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%struct.bar = type { i8 }
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%"class.echidna::capybara::mongoose::fluffy" = type { i32, i32 }
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%"struct.<anonymous namespace>::walrus" = type { i8 }
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%struct.wombat = type { %struct.anon }
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%struct.anon = type { i32, i32 }
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%struct.baz = type { i8 }
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@b = global %struct.bar zeroinitializer, align 1, !dbg !0
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@_ZN7echidna8capybara8mongoose6animalE = global %"class.echidna::capybara::mongoose::fluffy" zeroinitializer, align 4, !dbg !6
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@w = internal global %"struct.<anonymous namespace>::walrus" zeroinitializer, align 1, !dbg !16
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@wom = global %struct.wombat zeroinitializer, align 4, !dbg !25
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@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @_GLOBAL__I_a }]
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; Function Attrs: nounwind uwtable
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define void @_Z3foov() #0 !dbg !40 {
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entry:
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%b = alloca %struct.baz, align 1
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call void @llvm.dbg.declare(metadata %struct.baz* %b, metadata !43, metadata !45), !dbg !46
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ret void, !dbg !47
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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define internal void @__cxx_global_var_init() section ".text.startup" !dbg !48 {
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entry:
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call void @_ZN12_GLOBAL__N_16walrusC2Ev(%"struct.<anonymous namespace>::walrus"* @w), !dbg !49
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ret void, !dbg !49
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}
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; Function Attrs: nounwind uwtable
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define internal void @_ZN12_GLOBAL__N_16walrusC2Ev(%"struct.<anonymous namespace>::walrus"* %this) unnamed_addr #0 align 2 !dbg !50 {
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entry:
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%this.addr = alloca %"struct.<anonymous namespace>::walrus"*, align 8
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store %"struct.<anonymous namespace>::walrus"* %this, %"struct.<anonymous namespace>::walrus"** %this.addr, align 8
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call void @llvm.dbg.declare(metadata %"struct.<anonymous namespace>::walrus"** %this.addr, metadata !51, metadata !45), !dbg !53
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%this1 = load %"struct.<anonymous namespace>::walrus"*, %"struct.<anonymous namespace>::walrus"** %this.addr
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ret void, !dbg !54
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}
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define internal void @_GLOBAL__I_a() section ".text.startup" !dbg !55 {
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entry:
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call void @__cxx_global_var_init(), !dbg !57
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ret void, !dbg !57
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}
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attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!34}
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!llvm.module.flags = !{!37, !38}
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!llvm.ident = !{!39}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "b", scope: null, file: !2, line: 3, type: !3, isLocal: false, isDefinition: true)
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!2 = !DIFile(filename: "bar.cpp", directory: "/tmp/dbginfo")
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!3 = !DICompositeType(tag: DW_TAG_structure_type, name: "bar", file: !4, line: 1, size: 8, align: 8, elements: !5, identifier: "_ZTS3bar")
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!4 = !DIFile(filename: "bar.h", directory: "/tmp/dbginfo")
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!5 = !{}
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!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
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!7 = !DIGlobalVariable(name: "animal", linkageName: "_ZN7echidna8capybara8mongoose6animalE", scope: !8, file: !2, line: 18, type: !11, isLocal: false, isDefinition: true)
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!8 = !DINamespace(name: "mongoose", scope: !9)
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!9 = !DINamespace(name: "capybara", scope: !10)
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!10 = !DINamespace(name: "echidna", scope: null)
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!11 = !DICompositeType(tag: DW_TAG_class_type, name: "fluffy", scope: !8, file: !2, line: 13, size: 64, align: 32, elements: !12, identifier: "_ZTSN7echidna8capybara8mongoose6fluffyE")
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!12 = !{!13, !15}
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!13 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !11, file: !2, line: 14, baseType: !14, size: 32, align: 32, flags: DIFlagPrivate)
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!14 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!15 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !11, file: !2, line: 15, baseType: !14, size: 32, align: 32, offset: 32, flags: DIFlagPrivate)
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!16 = !DIGlobalVariableExpression(var: !17, expr: !DIExpression())
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!17 = !DIGlobalVariable(name: "w", scope: null, file: !2, line: 29, type: !18, isLocal: true, isDefinition: true)
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!18 = !DICompositeType(tag: DW_TAG_structure_type, name: "walrus", scope: !19, file: !2, line: 24, size: 8, align: 8, elements: !20)
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!19 = !DINamespace(scope: null)
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!20 = !{!21}
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!21 = !DISubprogram(name: "walrus", scope: !18, file: !2, line: 25, type: !22, isLocal: false, isDefinition: false, scopeLine: 25, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false)
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!22 = !DISubroutineType(types: !23)
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!23 = !{null, !24}
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!24 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!25 = !DIGlobalVariableExpression(var: !26, expr: !DIExpression())
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!26 = !DIGlobalVariable(name: "wom", scope: null, file: !2, line: 38, type: !27, isLocal: false, isDefinition: true)
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!27 = !DICompositeType(tag: DW_TAG_structure_type, name: "wombat", file: !2, line: 31, size: 64, align: 32, elements: !28, identifier: "_ZTS6wombat")
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!28 = !{!29}
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!29 = !DIDerivedType(tag: DW_TAG_member, name: "a_b", scope: !27, file: !2, line: 35, baseType: !30, size: 64, align: 32)
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!30 = !DICompositeType(tag: DW_TAG_structure_type, scope: !27, file: !2, line: 32, size: 64, align: 32, elements: !31, identifier: "_ZTSN6wombatUt_E")
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!31 = !{!32, !33}
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!32 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !30, file: !2, line: 33, baseType: !14, size: 32, align: 32)
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!33 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !30, file: !2, line: 34, baseType: !14, size: 32, align: 32, offset: 32)
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!34 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 3.5 ", isOptimized: false, runtimeVersion: 0, splitDebugFilename: "bar.dwo", emissionKind: FullDebug, enums: !5, retainedTypes: !35, globals: !36, imports: !5)
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!35 = !{!3, !11, !27, !30}
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!36 = !{!0, !6, !16, !25}
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!37 = !{i32 2, !"Dwarf Version", i32 4}
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!38 = !{i32 1, !"Debug Info Version", i32 3}
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!39 = !{!"clang version 3.5 "}
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!40 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !2, file: !2, line: 5, type: !41, isLocal: false, isDefinition: true, scopeLine: 5, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !34, retainedNodes: !5)
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!41 = !DISubroutineType(types: !42)
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!42 = !{null}
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!43 = !DILocalVariable(name: "b", scope: !40, file: !2, line: 7, type: !44)
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!44 = !DICompositeType(tag: DW_TAG_structure_type, name: "baz", scope: !40, file: !2, line: 6, size: 8, align: 8, elements: !5)
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!45 = !DIExpression()
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!46 = !DILocation(line: 7, scope: !40)
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!47 = !DILocation(line: 8, scope: !40)
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!48 = distinct !DISubprogram(name: "__cxx_global_var_init", scope: !2, file: !2, line: 29, type: !41, isLocal: true, isDefinition: true, scopeLine: 29, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !34, retainedNodes: !5)
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!49 = !DILocation(line: 29, scope: !48)
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!50 = distinct !DISubprogram(name: "walrus", linkageName: "_ZN12_GLOBAL__N_16walrusC2Ev", scope: !18, file: !2, line: 25, type: !22, isLocal: true, isDefinition: true, scopeLine: 25, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !34, declaration: !21, retainedNodes: !5)
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!51 = !DILocalVariable(name: "this", arg: 1, scope: !50, type: !52, flags: DIFlagArtificial | DIFlagObjectPointer)
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!52 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64, align: 64)
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!53 = !DILocation(line: 0, scope: !50)
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!54 = !DILocation(line: 25, scope: !50)
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!55 = distinct !DISubprogram(linkageName: "_GLOBAL__I_a", scope: !2, file: !2, line: 25, type: !56, isLocal: true, isDefinition: true, scopeLine: 25, virtualIndex: 6, flags: DIFlagArtificial, isOptimized: false, unit: !34, retainedNodes: !5)
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!56 = !DISubroutineType(types: !5)
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!57 = !DILocation(line: 25, scope: !55)
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