https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68904
Bug ID: 68904
Summary: DWARF for class ios_base says it's a declaration
Product: gcc
Version: 5.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: chihin.ko at oracle dot com
Target Milestone: ---
We've build the appended program with all manner of g++'s (from 3.4.3 to 5.2.0)
and in all cases the DWARF information for class ios_base is "weird":
< 2><0x00000601> DW_TAG_class_type
DW_AT_name "ios_base"
DW_AT_declaration yes(1)
DW_AT_sibling <0x0000080d>
BUT IT HAS THE USUAL MEMBER DEFINITIONS ETC FOLLOWING HERE!
The test program has some other only-forward, empty and within-namespace
definitions
and for them the DWARF is as expected:
class Fwd;
< 1><0x000018d2> DW_TAG_class_type
DW_AT_name "Fwd"
DW_AT_declaration yes(1)
class Foo {
public:
int foo;
};
< 1><0x000014b6> DW_TAG_class_type
DW_AT_name "Foo"
DW_AT_byte_size 0x00000004
DW_AT_decl_file 0x00000001
/net/djomolungma/export/home/test/gnu/class/t.cc
DW_AT_decl_line 0x00000012
DW_AT_sibling <0x000014e6>
< 2><0x000014c2> DW_TAG_member
ADDITIONAL MEMBER INFO
class Bar {
};
< 1><0x000014ec> DW_TAG_class_type
DW_AT_name "Bar"
DW_AT_byte_size 0x00000001
DW_AT_decl_file 0x00000001
/net/djomolungma/export/home/test/gnu/class/t.cc
DW_AT_decl_line 0x00000019
something gets the compiler confused about 'ios_base' such that it emits
attributes that say it's a declaration but then the compiler also
outputs full member information for 'ios_base'.
