https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66069
Bug ID: 66069
Summary: New -fkeep-all-method-instances
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: jan.kratochvil at redhat dot com
Target Milestone: ---
Target: x86_64-linux-gnu
For debugging (-O0 -g) code there could be a way to provide all instantiable
methods for TYPE when anything from template<TYPE> gets used. The problem:
-------------------------------------------------------------------------------
1 #include <memory>
2 class C { public: int i; };
3 int main() {
4 std::unique_ptr<C> cp(new C());
5 return cp->i;
6 }
(gdb) p cp
$1 = std::unique_ptr<C> containing 0x603010
(gdb) p *cp
Could not find operator*.
-------------------------------------------------------------------------------
compiled-in:
std::unique_ptr<C, std::default_delete<C> >::get() const
std::unique_ptr<C, std::default_delete<C> >::get_deleter()
std::unique_ptr<C, std::default_delete<C> >::operator->() const
std::unique_ptr<C, std::default_delete<C> >::unique_ptr(C*)
std::unique_ptr<C, std::default_delete<C> >::~unique_ptr()
-------------------------------------------------------------------------------
The current workaround:
-------------------------------------------------------------------------------
1 #include <memory>
2 class C { public: int i; };
3 int main() {
4 std::unique_ptr<C> cp(new C());
5 __attribute__((unused)) const C &gdbstub(*cp);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
6 return cp->i;
7 }
(gdb) p *cp
$1 = (C &) @0x603010: {i = 0}
-------------------------------------------------------------------------------
added method:
std::unique_ptr<C, std::default_delete<C> >::operator*() const
-------------------------------------------------------------------------------
Similar problems are with operator[], operator-> for maps etc.
