[llvm] [llvm][dwarfdump] Add --child-tags option to filter by DWARF tags (PR #165720)

[James Henderson via llvm-commits]

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@@ -0,0 +1,127 @@
+# Tests the --filter-child-tag (-t) option.
+# RUN: yaml2obj %s -o %t.o
+# RUN: llvm-dwarfdump %t.o --filter-child-tag=DW_TAG_structure_type | FileCheck %s --check-prefix=ONLY_STRUCT
+# RUN: llvm-dwarfdump %t.o -t DW_TAG_structure_type -t DW_TAG_namespace | FileCheck %s --check-prefix=STRUCT_AND_NS --implicit-check-not=DW_TAG_subprogram --implicit-check-not=DW_TAG_member
+# RUN: llvm-dwarfdump %t.o -c --name=Foo -t DW_TAG_member | FileCheck %s --check-prefix=FOO_MEM --implicit-check-not=DW_TAG_compile_unit --implicit-check-not=DW_TAG_subprogram --implicit-check-not=DW_TAG_namespace
+# RUN: llvm-dwarfdump %t.o -c --name=Foo -t not_a_tag -t DW_TAG_member | FileCheck %s --check-prefix=SINGLE_INVALID_TAG --implicit-check-not=DW_TAG_compile_unit --implicit-check-not=DW_TAG_subprogram --implicit-check-not=DW_TAG_namespace
+# RUN: llvm-dwarfdump %t.o -c --name=Foo -t not_a_tag | FileCheck %s --check-prefix=ONLY_INVALID_TAGS --implicit-check-not=DW_TAG_compile_unit --implicit-check-not=DW_TAG_subprogram --implicit-check-not=DW_TAG_namespace --implicit-check-not=DW_TAG_member
+# RUN: llvm-dwarfdump %t.o -c -p --name=Foo -t DW_TAG_member | FileCheck %s --check-prefix=FOO_MEM_WITH_PARENT --implicit-check-not=DW_TAG_subprogram
+# RUN: not llvm-dwarfdump %t.o --name=Foo -t DW_TAG_member 2>&1 | FileCheck %s --check-prefix=ERROR_NO_SHOW_CHILDREN
+
+# ONLY_STRUCT: DW_TAG_compile_unit
+# ONLY_STRUCT-NOT: DW_TAG_namespace
+# ONLY_STRUCT-NOT: DW_TAG_structure_type
+
+# STRUCT_AND_NS: DW_TAG_compile_unit
+# STRUCT_AND_NS: DW_TAG_namespace
+# STRUCT_AND_NS: DW_TAG_structure_type
+# STRUCT_AND_NS: DW_TAG_structure_type
+
+# FOO_MEM: DW_TAG_structure_type
+# FOO_MEM: DW_TAG_member
+# FOO_MEM: DW_TAG_member
+# FOO_MEM: DW_TAG_member
+# FOO_MEM-NOT: DW_TAG_structure_type
+# FOO_MEM-NOT: DW_TAG_member
+
+# SINGLE_INVALID_TAG: DW_TAG_structure_type
+# SINGLE_INVALID_TAG: DW_TAG_member
+# SINGLE_INVALID_TAG: DW_TAG_member
+# SINGLE_INVALID_TAG: DW_TAG_member
+# SINGLE_INVALID_TAG-NOT: DW_TAG_structure_type
+# SINGLE_INVALID_TAG-NOT: DW_TAG_member
+
+# ONLY_INVALID_TAGS: DW_TAG_structure_type
+# ONLY_INVALID_TAGS-NOT: DW_TAG_structure_type
+
+# FOO_MEM_WITH_PARENT: DW_TAG_compile_unit
+# FOO_MEM_WITH_PARENT: DW_TAG_namespace
+# FOO_MEM_WITH_PARENT: DW_TAG_structure_type
+# FOO_MEM_WITH_PARENT: DW_TAG_member
+# FOO_MEM_WITH_PARENT: DW_TAG_member
+# FOO_MEM_WITH_PARENT: DW_TAG_member
+# FOO_MEM_WITH_PARENT-NOT: DW_TAG_structure_type
+# FOO_MEM_WITH_PARENT-NOT: DW_TAG_member
+
+# ERROR_NO_SHOW_CHILDREN: incompatible arguments: --filter-child-tag requires --show-children
+
+--- !ELF
+FileHeader:
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_EXEC
+  Machine: EM_X86_64
+DWARF:
+  debug_abbrev:
+    - Table:
+      # 1
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jh7370 wrote:

What are these comments for?

https://github.com/llvm/llvm-project/pull/165720