fuchsia: Add safestack as a supported sanitizer for x86_64 fuchsia

[PiJoules]

Make it also enabled by default just like it is for clang.

[rustbot]

These commits modify compiler targets.
(See the Target Tier Policy.)

[rustbot]

r? @adwinwhite

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[PiJoules]

r? @erickt

[rustbot]

Failed to set assignee to erickt: invalid assignee

Note: Only org members with at least the repository "read" role, users with write permissions, or people who have commented on the PR may be assigned.

[rust-log-analyzer]

The job aarch64-gnu-llvm-21-1 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

------FileCheck stderr------------------------------
/checkout/tests/assembly-llvm/stack-protector/stack-protector-target-support.rs:272:10: error: r77: expected string not found in input
 // r77: __stack_chk_fail
         ^
/checkout/obj/build/aarch64-unknown-linux-gnu/test/assembly-llvm/stack-protector/stack-protector-target-support.r77/stack-protector-target-support.s:2:20: note: scanning from here
 .section .text.foo,"ax",@progbits
                   ^
/checkout/obj/build/aarch64-unknown-linux-gnu/test/assembly-llvm/stack-protector/stack-protector-target-support.r77/stack-protector-target-support.s:14:20: note: possible intended match here
 .section ".note.GNU-stack","",@progbits
                   ^

Input file: /checkout/obj/build/aarch64-unknown-linux-gnu/test/assembly-llvm/stack-protector/stack-protector-target-support.r77/stack-protector-target-support.s
Check file: /checkout/tests/assembly-llvm/stack-protector/stack-protector-target-support.rs

-dump-input=help explains the following input dump.

Input was:
<<<<<<
             1:  .file "stack_protector_target_support.288192ff6b7189e6-cgu.0" 
             2:  .section .text.foo,"ax",@progbits 
check:272'0                        X~~~~~~~~~~~~~~~ error: no match found
             3:  .globl foo 
check:272'0     ~~~~~~~~~~~~
             4:  .p2align 4 
check:272'0     ~~~~~~~~~~~~
             5:  .type foo,@function 
check:272'0     ~~~~~~~~~~~~~~~~~~~~~
             6: foo: 
check:272'0     ~~~~~
             7:  .cfi_startproc 
check:272'0     ~~~~~~~~~~~~~~~~
             8:  retq 
check:272'0     ~~~~~~
             9: .Lfunc_end0: 
check:272'0     ~~~~~~~~~~~~~
            10:  .size foo, .Lfunc_end0-foo 
check:272'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            11:  .cfi_endproc 
check:272'0     ~~~~~~~~~~~~~~
            12:  
check:272'0     ~
            13:  .ident "rustc version 1.99.0-nightly (0ec8cbf5b 2026-07-24)" 
check:272'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            14:  .section ".note.GNU-stack","",@progbits 
check:272'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
check:272'1                        ?                      possible intended match
>>>>>>

------------------------------------------

error in revision `r77`: verification with 'FileCheck' failed
status: exit status: 1
command: "/usr/lib/llvm-21/bin/FileCheck" "--input-file" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/assembly-llvm/stack-protector/stack-protector-target-support.r77/stack-protector-target-support.s" "/checkout/tests/assembly-llvm/stack-protector/stack-protector-target-support.rs" "--check-prefix=CHECK" "--check-prefix" "r77" "--allow-unused-prefixes" "--dump-input-context" "100"
stdout: none
--- stderr -------------------------------
/checkout/tests/assembly-llvm/stack-protector/stack-protector-target-support.rs:272:10: error: r77: expected string not found in input
 // r77: __stack_chk_fail
         ^
/checkout/obj/build/aarch64-unknown-linux-gnu/test/assembly-llvm/stack-protector/stack-protector-target-support.r77/stack-protector-target-support.s:2:20: note: scanning from here
 .section .text.foo,"ax",@progbits
                   ^
/checkout/obj/build/aarch64-unknown-linux-gnu/test/assembly-llvm/stack-protector/stack-protector-target-support.r77/stack-protector-target-support.s:14:20: note: possible intended match here
 .section ".note.GNU-stack","",@progbits
                   ^

Input file: /checkout/obj/build/aarch64-unknown-linux-gnu/test/assembly-llvm/stack-protector/stack-protector-target-support.r77/stack-protector-target-support.s
Check file: /checkout/tests/assembly-llvm/stack-protector/stack-protector-target-support.rs

-dump-input=help explains the following input dump.

Input was:
<<<<<<
             1:  .file "stack_protector_target_support.288192ff6b7189e6-cgu.0" 
             2:  .section .text.foo,"ax",@progbits 
check:272'0                        X~~~~~~~~~~~~~~~ error: no match found
             3:  .globl foo 
check:272'0     ~~~~~~~~~~~~
             4:  .p2align 4 
check:272'0     ~~~~~~~~~~~~
             5:  .type foo,@function 
check:272'0     ~~~~~~~~~~~~~~~~~~~~~
             6: foo: 
check:272'0     ~~~~~
             7:  .cfi_startproc 
check:272'0     ~~~~~~~~~~~~~~~~
             8:  retq 
check:272'0     ~~~~~~
             9: .Lfunc_end0: 
check:272'0     ~~~~~~~~~~~~~
            10:  .size foo, .Lfunc_end0-foo 
check:272'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            11:  .cfi_endproc 
check:272'0     ~~~~~~~~~~~~~~
            12:  
check:272'0     ~
            13:  .ident "rustc version 1.99.0-nightly (0ec8cbf5b 2026-07-24)" 
check:272'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            14:  .section ".note.GNU-stack","",@progbits 
check:272'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
check:272'1                        ?                      possible intended match
>>>>>>
------------------------------------------

---- [assembly] tests/assembly-llvm/stack-protector/stack-protector-target-support.rs#r77 stdout end ----

failures:
    [assembly] tests/assembly-llvm/stack-protector/stack-protector-target-support.rs#r77

test result: FAILED. 620 passed; 1 failed; 110 ignored; 0 measured; 0 filtered out; finished in 16.79s

[workingjubilee]

huh. that's weird.

[adwinwhite]

@rustbot author

[rustbot]

Reminder, once the PR becomes ready for a review, use @rustbot ready.