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From: "i at maskray dot me" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/109489] New: [ubsan] Support -fsanitize-trap=
Date: Wed, 12 Apr 2023 18:07:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109489

            Bug ID: 109489
           Summary: [ubsan] Support -fsanitize-trap=3D
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: i at maskray dot me
  Target Milestone: ---

Clang has supported -fsanitize-trap=3Dundefined and many fine-grained optio=
ns[1]
e.g. -fsanitize-trap=3Dalignment since 2015.

-fsanitize-undefined-trap-on-error is a deprecated alias for
-fsanitize-trap=3Dundefined in Clang. -fsanitize-trap=3D provides fine-grai=
ned
control over putting specific checks into the trap mode, and it provides a
unified interface with -fsanitize=3D and -fsanitize-recover=3D.

As an example, -fsanitize=3Dundefined in the normal mode may increase the b=
inary
size a lot.
The user may put some checks into the trap mode while keeping the rest in t=
he
normal mode (-fsanitize-trap=3Dalignment,null) to make the binary smaller.

[1]: https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html=