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From: "laurent.alfonsi at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/107940] temp_directory_path testcase broken
Date: Wed, 30 Nov 2022 22:49:34 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107940

--- Comment #4 from laurent.alfonsi at linaro dot org <laurent.alfonsi at l=
inaro dot org> ---
(In reply to Jonathan Wakely from comment #1)
> (In reply to laurent.alfonsi@linaro.org from comment #0)
> > This may be linked to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D90=
787.
> > But, I confirm my toolchain is based on trunk (13.0), and contains the =
90787
> > fix.
>=20
> No, I don't think it's related to that in any way.
>=20
> valgrind and asan are both clean when running that test on
> x86_64-pc-linux-gnu.
>=20
> Where does valgrind say there are uninitialized values? Maybe the problem=
 is
> in the unwinder.

Plenty places : "More than 1000 different errors detected"

Many are from init phase :
=3D=3D47392=3D=3D Conditional jump or move depends on uninitialised value(s)
=3D=3D47392=3D=3D    at 0x497FB0: malloc=20
=3D=3D47392=3D=3D    by 0x4C6E23: _dl_get_origin
=3D=3D47392=3D=3D    by 0x4B0A0F: _dl_non_dynamic_init
=3D=3D47392=3D=3D    by 0x4B147B: __libc_init_first
=3D=3D47392=3D=3D    by 0x469DBB: (below main)

Then from the testcase itself (test02):=20
=3D=3D47392=3D=3D Conditional jump or move depends on uninitialised value(s)
=3D=3D47392=3D=3D    at 0x498034: malloc=20
=3D=3D47392=3D=3D    by 0x40C70B: operator new(unsigned long)=20
=3D=3D47392=3D=3D    by 0x401923: void std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> >::_M_construct<char const*>(c=
har
const*, char const*, std::forward_iterator_tag) [clone .isra.0]
=3D=3D47392=3D=3D    by 0x4036F3: test02()=20
=3D=3D47392=3D=3D    by 0x400DDB: main=20

test03 :=20
=3D=3D47392=3D=3D Conditional jump or move depends on uninitialised value(s)
=3D=3D47392=3D=3D    at 0x47B6F4: unsetenv=20
=3D=3D47392=3D=3D    by 0x403FBF: test03()=20
=3D=3D47392=3D=3D    by 0x400DDF: main=