Closed as not planned
Description
We are adding declarations of types to debug-names when type units are involved:
For example:
namespace MyNamespace {
struct MyStruct1 {
char c1;
};
struct MyStruct2 {
char c2;
};
}
MyNamespace::MyStruct1 gv1;
MyNamespace::MyStruct2 gv2;
Compiling with:
clang++ -target x86_64 -c two_tus.cpp -g2 -gpubnames -fdebug-types-section -o - | \
llvm-dwarfdump - --debug-names | \
grep MyStruct2 -A14
We see:
Bucket 0 [
Name 1 {
Hash: 0xE186C022
String: 0x00000037 "MyStruct2"
Entry @ 0xc9 {
Abbrev: 0x26c
Tag: DW_TAG_structure_type
DW_IDX_type_unit: 0x01
DW_IDX_die_offset: 0x00000025
}
Entry @ 0xd0 {
Abbrev: 0x268
Tag: DW_TAG_structure_type
DW_IDX_die_offset: 0x00000034
}
}
]
I can't explain why this second entry is added. Looking at the debug-info section, the offset 0x34 is an offset to the declaration inside the CU:
0x00000029: DW_TAG_namespace
DW_AT_name ("MyNamespace")
0x0000002b: DW_TAG_structure_type
DW_AT_declaration (true)
DW_AT_signature (0x8b108ad18e93cb95)
0x00000034: DW_TAG_structure_type
DW_AT_declaration (true)
DW_AT_signature (0x690ca39e0eeaec8f)
0x0000003d: NULL
But declarations are not supposed to show up in debug-names...
Originally posted by @felipepiovezan in #77457 (comment)