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* [Bug c++/70331] missing error dereferencing a dangling pointer in constexpr function
[not found] <bug-70331-4@http.gcc.gnu.org/bugzilla/>
@ 2021-07-27 10:05 ` pinskia at gcc dot gnu.org
2021-10-05 14:15 ` [Bug c++/70331] missing error dereferencing a dangling pointer (out of scope) " pinskia at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-07-27 10:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70331
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-07-27
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/70331] missing error dereferencing a dangling pointer (out of scope) in constexpr function
[not found] <bug-70331-4@http.gcc.gnu.org/bugzilla/>
2021-07-27 10:05 ` [Bug c++/70331] missing error dereferencing a dangling pointer in constexpr function pinskia at gcc dot gnu.org
@ 2021-10-05 14:15 ` pinskia at gcc dot gnu.org
2021-10-05 14:15 ` pinskia at gcc dot gnu.org
2023-07-26 1:45 ` cvs-commit at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-05 14:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70331
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |klaus.doldinger64@googlemai
| |l.com
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 93389 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/70331] missing error dereferencing a dangling pointer (out of scope) in constexpr function
[not found] <bug-70331-4@http.gcc.gnu.org/bugzilla/>
2021-07-27 10:05 ` [Bug c++/70331] missing error dereferencing a dangling pointer in constexpr function pinskia at gcc dot gnu.org
2021-10-05 14:15 ` [Bug c++/70331] missing error dereferencing a dangling pointer (out of scope) " pinskia at gcc dot gnu.org
@ 2021-10-05 14:15 ` pinskia at gcc dot gnu.org
2023-07-26 1:45 ` cvs-commit at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-05 14:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70331
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fchelnokov at gmail dot com
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 102603 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/70331] missing error dereferencing a dangling pointer (out of scope) in constexpr function
[not found] <bug-70331-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2021-10-05 14:15 ` pinskia at gcc dot gnu.org
@ 2023-07-26 1:45 ` cvs-commit at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2023-07-26 1:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70331
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Jason Merrill <jason@gcc.gnu.org>:
https://gcc.gnu.org/g:9fdbd7d6fa5e0a76898dd66658934e3184111680
commit r14-2773-g9fdbd7d6fa5e0a76898dd66658934e3184111680
Author: Nathaniel Shead <nathanieloshead@gmail.com>
Date: Sun Jul 23 01:15:14 2023 +1000
c++: Track lifetimes in constant evaluation [PR70331,PR96630,PR98675]
This adds rudimentary lifetime tracking in C++ constexpr contexts,
allowing the compiler to report errors with using values after their
backing has gone out of scope. We don't yet handle other ways of
accessing values outside their lifetime (e.g. following explicit
destructor calls).
PR c++/96630
PR c++/98675
PR c++/70331
gcc/cp/ChangeLog:
* constexpr.cc (constexpr_global_ctx::is_outside_lifetime): New
function.
(constexpr_global_ctx::get_value): Don't return expired values.
(constexpr_global_ctx::get_value_ptr): Likewise.
(constexpr_global_ctx::remove_value): Mark value outside
lifetime.
(outside_lifetime_error): New function.
(cxx_eval_call_expression): No longer track save_exprs.
(cxx_eval_loop_expr): Likewise.
(cxx_eval_constant_expression): Add checks for outside lifetime
values. Remove local variables at end of bind exprs, and
temporaries after cleanup points.
gcc/testsuite/ChangeLog:
* g++.dg/cpp1y/constexpr-lifetime1.C: New test.
* g++.dg/cpp1y/constexpr-lifetime2.C: New test.
* g++.dg/cpp1y/constexpr-lifetime3.C: New test.
* g++.dg/cpp1y/constexpr-lifetime4.C: New test.
* g++.dg/cpp1y/constexpr-lifetime5.C: New test.
* g++.dg/cpp1y/constexpr-lifetime6.C: New test.
Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-07-27 10:05 ` [Bug c++/70331] missing error dereferencing a dangling pointer in constexpr function pinskia at gcc dot gnu.org
2021-10-05 14:15 ` [Bug c++/70331] missing error dereferencing a dangling pointer (out of scope) " pinskia at gcc dot gnu.org
2021-10-05 14:15 ` pinskia at gcc dot gnu.org
2023-07-26 1:45 ` cvs-commit at gcc dot gnu.org
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