[clang] [llvm] [PAC][ELF][AArch64] Support signed personality function pointer (PR #113148)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux-fast` running on `sanitizer-buildbot4` while building `clang,llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/169/builds/6246

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 87724 of 87725 tests, 88 workers --
Testing:  0.. 10.. 20.. 30..
FAIL: LLVM :: CodeGen/Generic/machine-function-splitter.ll (2096 of 87724)
******************** TEST 'LLVM :: CodeGen/Generic/machine-function-splitter.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 5: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc < /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -mtriple=x86_64-unknown-linux-gnu -split-machine-functions | /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -check-prefixes=MFS-DEFAULTS,MFS-DEFAULTS-X86,MFS-NOBBSECTIONS
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc -mtriple=x86_64-unknown-linux-gnu -split-machine-functions
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -check-prefixes=MFS-DEFAULTS,MFS-DEFAULTS-X86,MFS-NOBBSECTIONS
RUN: at line 6: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc < /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -mtriple=x86_64-unknown-linux-gnu -split-machine-functions -mfs-psi-cutoff=0 -mfs-count-threshold=2000 | /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll --dump-input=always -check-prefixes=MFS-OPTS1,MFS-OPTS1-X86
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc -mtriple=x86_64-unknown-linux-gnu -split-machine-functions -mfs-psi-cutoff=0 -mfs-count-threshold=2000
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll --dump-input=always -check-prefixes=MFS-OPTS1,MFS-OPTS1-X86

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll

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

Input was:
<<<<<<
     1:  .text 
     2:  .file "<stdin>" 
     3:  .section .text.hot.foo1,"ax", at progbits 
     4:  .globl foo1 # -- Begin function foo1 
     5:  .p2align 4 
     6:  .type foo1, at function 
     7: foo1: # @foo1 
     8: # %bb.0: 
     9:  pushq %rax 
    10:  testl %edi, %edi 
    11:  je foo1.cold 
    12: # %bb.1: 
    13:  callq bar at PLT 
    14:  popq %rax 
    15:  jmp qux at PLT # TAILCALL 
    16: .LBB_END0_1: 
    17:  .section .text.split.foo1,"ax", at progbits 
    18: foo1.cold: 
    19:  callq baz at PLT 
Step 10 (stage2/asan_ubsan check) failure: stage2/asan_ubsan check (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 87724 of 87725 tests, 88 workers --
Testing:  0.. 10.. 20.. 30..
FAIL: LLVM :: CodeGen/Generic/machine-function-splitter.ll (2096 of 87724)
******************** TEST 'LLVM :: CodeGen/Generic/machine-function-splitter.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 5: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc < /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -mtriple=x86_64-unknown-linux-gnu -split-machine-functions | /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -check-prefixes=MFS-DEFAULTS,MFS-DEFAULTS-X86,MFS-NOBBSECTIONS
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc -mtriple=x86_64-unknown-linux-gnu -split-machine-functions
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -check-prefixes=MFS-DEFAULTS,MFS-DEFAULTS-X86,MFS-NOBBSECTIONS
RUN: at line 6: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc < /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -mtriple=x86_64-unknown-linux-gnu -split-machine-functions -mfs-psi-cutoff=0 -mfs-count-threshold=2000 | /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll --dump-input=always -check-prefixes=MFS-OPTS1,MFS-OPTS1-X86
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/llc -mtriple=x86_64-unknown-linux-gnu -split-machine-functions -mfs-psi-cutoff=0 -mfs-count-threshold=2000
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_asan_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll --dump-input=always -check-prefixes=MFS-OPTS1,MFS-OPTS1-X86

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll

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

Input was:
<<<<<<
     1:  .text 
     2:  .file "<stdin>" 
     3:  .section .text.hot.foo1,"ax", at progbits 
     4:  .globl foo1 # -- Begin function foo1 
     5:  .p2align 4 
     6:  .type foo1, at function 
     7: foo1: # @foo1 
     8: # %bb.0: 
     9:  pushq %rax 
    10:  testl %edi, %edi 
    11:  je foo1.cold 
    12: # %bb.1: 
    13:  callq bar at PLT 
    14:  popq %rax 
    15:  jmp qux at PLT # TAILCALL 
    16: .LBB_END0_1: 
    17:  .section .text.split.foo1,"ax", at progbits 
    18: foo1.cold: 
    19:  callq baz at PLT 
Step 13 (stage2/msan check) failure: stage2/msan check (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 87723 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40
FAIL: LLVM :: CodeGen/Generic/machine-function-splitter.ll (1923 of 87723)
******************** TEST 'LLVM :: CodeGen/Generic/machine-function-splitter.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 5: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/llc < /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -mtriple=x86_64-unknown-linux-gnu -split-machine-functions | /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -check-prefixes=MFS-DEFAULTS,MFS-DEFAULTS-X86,MFS-NOBBSECTIONS
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/llc -mtriple=x86_64-unknown-linux-gnu -split-machine-functions
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -check-prefixes=MFS-DEFAULTS,MFS-DEFAULTS-X86,MFS-NOBBSECTIONS
RUN: at line 6: /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/llc < /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll -mtriple=x86_64-unknown-linux-gnu -split-machine-functions -mfs-psi-cutoff=0 -mfs-count-threshold=2000 | /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll --dump-input=always -check-prefixes=MFS-OPTS1,MFS-OPTS1-X86
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/FileCheck /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll --dump-input=always -check-prefixes=MFS-OPTS1,MFS-OPTS1-X86
+ /home/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/llc -mtriple=x86_64-unknown-linux-gnu -split-machine-functions -mfs-psi-cutoff=0 -mfs-count-threshold=2000

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux-fast/build/llvm-project/llvm/test/CodeGen/Generic/machine-function-splitter.ll

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

Input was:
<<<<<<
     1:  .text 
     2:  .file "<stdin>" 
     3:  .section .text.hot.foo1,"ax", at progbits 
     4:  .globl foo1 # -- Begin function foo1 
     5:  .p2align 4 
     6:  .type foo1, at function 
     7: foo1: # @foo1 
     8: # %bb.0: 
     9:  pushq %rax 
    10:  testl %edi, %edi 
    11:  je foo1.cold 
    12: # %bb.1: 
    13:  callq bar at PLT 
    14:  popq %rax 
    15:  jmp qux at PLT # TAILCALL 
    16: .LBB_END0_1: 
    17:  .section .text.split.foo1,"ax", at progbits 
    18: foo1.cold: 
    19:  callq baz at PLT 

```

</details>

https://github.com/llvm/llvm-project/pull/113148