Message ID | 20240118-submit-domain-hacks-2-v2-6-aecab29fa104@tromey.com |
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State | New |
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Series |
Restructure symbol domains
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Commit Message
Tom Tromey
Jan. 18, 2024, 8:32 p.m. UTC
A patch later in this series will change check_typedef to also look in the type domain. This change by itself caused a regression, but one that revealed some peculiar behavior. The regression is in nullptr_t.exp, where examining a std::nullptr_t will change from the correct: typedef decltype(nullptr) std::nullptr_t; to typedef void std::nullptr_t; Right now, the DWARF reader marks all unspecified types as stub types. However, this interacts weirdly with check_typedef, which currently does not try to resolve types -- only struct-domain objects. My first attempt here was to fix this by changing void types not to be stub types, as I didn't see what value that provided. However, this caused another regression, because call_function_by_hand_dummy checks for stub-ness: if (values_type == NULL || values_type->is_stub ()) values_type = default_return_type; I'm not really sure why it does this rather than check for TYPE_CODE_VOID. While looking into this, I found another oddity: the DWARF reader correctly creates a type named 'decltype(nullptr)' when it seems a DW_TAG_unspecified_type -- but it creates a symbol named "void" instead. This patch changes the DWARF reader to give the symbol the correct name. This avoids the regression. --- gdb/dwarf2/read.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c index a4b8a855e24..078edd8c842 100644 --- a/gdb/dwarf2/read.c +++ b/gdb/dwarf2/read.c @@ -6593,6 +6593,7 @@ process_die (struct die_info *die, struct dwarf2_cu *cu) case DW_TAG_subrange_type: case DW_TAG_generic_subrange: case DW_TAG_typedef: + case DW_TAG_unspecified_type: /* Add a typedef symbol for the type definition, if it has a DW_AT_name. */ new_symbol (die, read_type_die (die, cu), cu);