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0a592fd282
Summary:
This support is needed for the Fortran array variables with pointer/allocatable
attribute. This support enables debugger to identify the status of variable
whether that is currently allocated/associated.
for pointer array (before allocation/association)
without DW_AT_associated
(gdb) pt ptr
type = integer (140737345375288:140737354129776)
(gdb) p ptr
value requires 35017956 bytes, which is more than max-value-size
with DW_AT_associated
(gdb) pt ptr
type = integer (:)
(gdb) p ptr
$1 = <not associated>
for allocatable array (before allocation)
without DW_AT_allocated
(gdb) pt arr
type = integer (140737345375288:140737354129776)
(gdb) p arr
value requires 35017956 bytes, which is more than max-value-size
with DW_AT_allocated
(gdb) pt arr
type = integer, allocatable (:)
(gdb) p arr
$1 = <not allocated>
Testing
- unit test cases added
- check-llvm
- check-debuginfo
Reviewed By: aprantl
Differential Revision: https://reviews.llvm.org/D83544
33 lines
2.1 KiB
LLVM
33 lines
2.1 KiB
LLVM
;; This test checks dataLocation field of DICompositeType
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; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis | FileCheck %s
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;; Test whether DW_AT_data_location is generated.
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; CHECK: !DICompositeType(tag: DW_TAG_array_type, baseType: !{{[0-9]+}}, size: 32, align: 32, elements: !{{[0-9]+}}, dataLocation: !{{[0-9]+}}, allocated: !{{[0-9]+}})
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; CHECK: !DICompositeType(tag: DW_TAG_array_type, baseType: !{{[0-9]+}}, size: 32, align: 32, elements: !{{[0-9]+}}, dataLocation: !DIExpression(DW_OP_push_object_address, DW_OP_deref), allocated: !DIExpression(DW_OP_push_object_address, DW_OP_deref))
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; ModuleID = 'allocated.f90'
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source_filename = "/dir/allocated.ll"
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!llvm.module.flags = !{!0, !1}
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!llvm.dbg.cu = !{!2}
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!0 = !{i32 2, !"Dwarf Version", i32 4}
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!1 = !{i32 2, !"Debug Info Version", i32 3}
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!2 = distinct !DICompileUnit(language: DW_LANG_Fortran90, file: !3, producer: " F90 Flang - 1.5 2017-05-01", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !5, globals: !4, imports: !4)
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!3 = !DIFile(filename: "allocated.f90", directory: "/dir")
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!4 = !{}
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!5 = !{!6, !17}
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!6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 32, align: 32, elements: !8, dataLocation: !10, allocated: !15)
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!7 = !DIBasicType(name: "integer", size: 32, align: 32, encoding: DW_ATE_signed)
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!8 = !{!9}
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!9 = !DISubrange(count: 19, lowerBound: 2)
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!10 = distinct !DILocalVariable(scope: !11, file: !3, type: !14, flags: DIFlagArtificial)
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!11 = distinct !DISubprogram(name: "main", scope: !2, file: !3, line: 1, type: !12, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagMainSubprogram, unit: !2)
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!12 = !DISubroutineType(cc: DW_CC_program, types: !13)
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!13 = !{null}
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!14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 32, align: 32)
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!15 = distinct !DILocalVariable(scope: !11, file: !3, type: !16, flags: DIFlagArtificial)
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!16 = !DIBasicType(name: "logical", size: 32, align: 32, encoding: DW_ATE_signed)
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!17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 32, align: 32, elements: !8, dataLocation: !DIExpression(DW_OP_push_object_address, DW_OP_deref), allocated: !DIExpression(DW_OP_push_object_address, DW_OP_deref))
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