https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115649
Bug ID: 115649
Summary: Non-ABI constructor (C4) emitted in DWARF .debug_info
Product: gcc
Version: 8.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: devengangwani12 at gmail dot com
Target Milestone: ---
Minimal example:
---
//test.cpp
struct A {
int p;
A(int a): p(a) {}
virtual ~A() {}
};
struct A1: public A {
int q;
A1(int b): A(b - 1), q(b) {}
~A1() {}
};
int main() {
A1 new_A1 = A1(5);
return new_A1.p;
}
---
Platform: x86_64
Compile with: g++ -g -c test.cpp
Relevant output of readelf -Ws test.o:
15: 0000000000000000 0 NOTYPE LOCAL DEFAULT 1 _ZN1AC5Ei
17: 0000000000000000 0 NOTYPE LOCAL DEFAULT 3 _ZN2A1C5Ei
19: 0000000000000000 42 FUNC WEAK DEFAULT 15 _ZN1AC2Ei
21: 0000000000000000 42 FUNC WEAK DEFAULT 15 _ZN1AC1Ei
26: 0000000000000000 66 FUNC WEAK DEFAULT 21 _ZN2A1C2Ei
28: 0000000000000000 66 FUNC WEAK DEFAULT 21 _ZN2A1C1Ei
Relevant output of dwarfdump -i test.o or readelf -Wwi test.o:
<41> DW_AT_linkage_name: (strp) (offset: 0x117): _ZN2A1C4ERKS_
<66> DW_AT Linkage_name: (strp) (offset: 0xff): _ZN2A1C4Ei
<b0> DW_AT_linkage_name: (strp) (offset: 0x10a): _ZNIAC4ERKS_
<de> DW AT_linkage_name: (strp) (offset: 0xfo): _ZN1AC4Ei
<22b> DW_AT_linkage_name: (strp) (offset: 0x3): _ZN2A1C2Ei
<2f7> DW_AT_ linkage_name: (strp) (offset: 0xbe): _ZN1AC2Ei
[all are DW_TAG_subprograms]
The linkage names should conform to the ABI which doesn't include C4
constructors (at least according to this:
https://itanium-cxx-abi.github.io/cxx-abi/abi.html).
