[Bug target/96260] New: RISC-V: -fsanitize=kernel-address is not available after gcc10

[Bug target/96260] New: RISC-V: -fsanitize=kernel-address is not available after gcc10

[green.hu at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96260

            Bug ID: 96260
           Summary: RISC-V: -fsanitize=kernel-address is not available
                    after gcc10
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: green.hu at gmail dot com
  Target Milestone: ---
            Target: riscv64

It used to work to build riscv64 Linux kernel with this option
"-fsanitize=kernel-address" for KASAN in gcc9 however it doesn't work in gcc10.

cc1: warning: '-fsanitize=address' and '-fsanitize=kernel-address' are not
supported for this target

[Bug target/96260] RISC-V: -fsanitize=kernel-address is not available after gcc10

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96260

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Depends on|                            |91441

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
See PR91441.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91441
[Bug 91441] ICE in asan_shadow_offset at asan.c:342 on riscv64 target

[Bug target/96260] RISC-V: -fsanitize=kernel-address is not available after gcc10

[kito at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96260

Kito Cheng <kito at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kito at gcc dot gnu.org

--- Comment #2 from Kito Cheng <kito at gcc dot gnu.org> ---
Yeah, seems like I fix PR91441 in wrong way.

[Bug target/96260] [10/11 Regression] RISC-V: -fsanitize=kernel-address is not available after gcc10

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96260

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |10.2
            Summary|RISC-V:                     |[10/11 Regression] RISC-V:
                   |-fsanitize=kernel-address   |-fsanitize=kernel-address
                   |is not available after      |is not available after
                   |gcc10                       |gcc10

[Bug target/96260] [10/11 Regression] RISC-V: -fsanitize=kernel-address is not available after gcc10

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96260

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|10.2                        |10.3

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10.2 is released, adjusting target milestone.

[Bug target/96260] [10/11 Regression] RISC-V: -fsanitize=kernel-address is not available after gcc10

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96260

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Kito Cheng <kito@gcc.gnu.org>:

https://gcc.gnu.org/g:2ca1b6d009b194286c3ec91f9c51cc6b0a475458

commit r11-2283-g2ca1b6d009b194286c3ec91f9c51cc6b0a475458
Author: Kito Cheng <kito.cheng@sifive.com>
Date:   Wed Jul 22 14:50:40 2020 +0800

    PR target/96260 - KASAN should work even back-end not porting anything.

     - Most KASAN function don't need any porting anything in back-end
       except asan stack protection.

     - However kernel will given shadow offset when enable asan stack
       protection, so eveything in KASAN can work if shadow offset is given.

     - Verified with x86 and risc-v.

     - Verified with RISC-V linux kernel.

    gcc/ChangeLog:

            PR target/96260
            * asan.c (asan_shadow_offset_set_p): New.
            * asan.h (asan_shadow_offset_set_p): Ditto.
            * toplev.c (process_options): Allow -fsanitize=kernel-address
            even TARGET_ASAN_SHADOW_OFFSET not implemented, only check when
            asan stack protection is enabled.

    gcc/testsuite/ChangeLog:

            PR target/96260
            * gcc.target/riscv/pr91441.c: Update warning message.
            * gcc.target/riscv/pr96260.c: New.

[Bug target/96260] [10/11 Regression] RISC-V: -fsanitize=kernel-address is not available after gcc10

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96260

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Kito Cheng <kito@gcc.gnu.org>:

https://gcc.gnu.org/g:83f1fbb9e7afaa77d52b200c7937788faa5f24d7

commit r10-8516-g83f1fbb9e7afaa77d52b200c7937788faa5f24d7
Author: Kito Cheng <kito.cheng@sifive.com>
Date:   Wed Jul 22 14:50:40 2020 +0800

    PR target/96260 - KASAN should work even back-end not porting anything.

     - Most KASAN function don't need any porting anything in back-end
       except asan stack protection.

     - However kernel will given shadow offset when enable asan stack
       protection, so eveything in KASAN can work if shadow offset is given.

     - Verified with x86 and risc-v.

     - Verified with RISC-V linux kernel.

    gcc/ChangeLog:

            PR target/96260
            * asan.c (asan_shadow_offset_set_p): New.
            * asan.h (asan_shadow_offset_set_p): Ditto.
            * toplev.c (process_options): Allow -fsanitize=kernel-address
            even TARGET_ASAN_SHADOW_OFFSET not implemented, only check when
            asan stack protection is enabled.

    gcc/testsuite/ChangeLog:

            PR target/96260
            * gcc.target/riscv/pr91441.c: Update warning message.
            * gcc.target/riscv/pr96260.c: New.

    (cherry picked from commit 2ca1b6d009b194286c3ec91f9c51cc6b0a475458)

[Bug target/96260] [10/11 Regression] RISC-V: -fsanitize=kernel-address is not available after gcc10

[kito at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96260

Kito Cheng <kito at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Kito Cheng <kito at gcc dot gnu.org> ---
Fixed on GCC 10 branch and trunk.