hi,
on the recent 4.5 branch i have a problems with dwarf4 and pretty printers.
here's steps to reproduce:
$ make
/local/devel/toolchain45/x86_64-gnu-linux.mt_alloc/bin/x86_64-gnu-linux-g++
t.cpp -gdwarf-3 -g2 -o t-dw3
/local/devel/toolchain45/x86_64-gnu-linux.mt_alloc/bin/x86_64-gnu-linux-g++
t.cpp -gdwarf-4 -g2 -o t-dw4
$ gdb ./t-dw3
(gdb) r
Breakpoint 1, main () at t.cpp:4
4 std::string s( "foo" );
(gdb) n
5 s.size();
(gdb) p s
$1 = "foo"
$ gdb ./t-dw4
(gdb) r
Breakpoint 1, main () at t.cpp:4
4 std::string s( "foo" );
(gdb) n
5 s.size();
(gdb) p s
$1 = Traceback (most recent call last):
File
"/local/devel/toolchain45/x86_64-gnu-linux.mt_alloc/share/gcc-4.5.2/python/libstdcxx/v6/printers.py",
line 547, in to_string
reptype = gdb.lookup_type (str (realtype) + '::_Rep').pointer ()
RuntimeError: No type named std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::_Rep.
$ readelf --debug-dump=pubtypes t-dw3
Contents of the .debug_pubtypes section:
Length: 443
Version: 2
Offset into .debug_info section: 0x0
Size of area in .debug_info section: 13545
Offset Name
2d ptrdiff_t
3f size_t
6bf __FILE
6ca __va_list_tag
709 wint_t
770 mbstate_t
fa4 char_traits
121c __pthread_internal_list
1243 __pthread_list_t
12ed __compar_fn_t
b99 tm
161c __gthread_mutex_t
1627 _Atomic_word
163a __pool_base
17c5 __pool
1998 __mt_alloc_base
1a8e __common_pool
1adb __common_pool_base
1b2f __common_pool_policy
1b57 __mt_alloc
1c62 allocator
1cf0 lconv
1e5c __numeric_traits_integer
1ecc basic_string
3293 _Rep_base
32c4 _Rep
$ readelf --debug-dump=pubtypes t-dw4
Contents of the .debug_pubtypes section:
Length: 394
Version: 2
Offset into .debug_info section: 0x0
Size of area in .debug_info section: 3926
Offset Name
2d ptrdiff_t
3f size_t
41e __FILE
25 __va_list_tag
42b wint_t
43e mbstate_t
34 char_traits
25 __pthread_internal_list
b7f __compar_fn_t
25 tm
34 __pool_base
34 __pool
34 __mt_alloc_base
34 __common_pool
34 __common_pool_base
34 __common_pool_policy
34 __mt_alloc
34 allocator
25 lconv
34 __numeric_traits_integer
25 rebind
34 basic_string
34 _Rep_base
34 _Rep
as you can see few types have the same "offset 34". looks like a bug.
--
Summary: broken debuginfo with dwarf4?
Product: gcc
Version: 4.5.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pluto at agmk dot net
GCC build triplet: x86_64-gnu-linux
GCC host triplet: x86_64-gnu-linux
GCC target triplet: x86_64-gnu-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45690
