[compiler-rt] [llvm] [asan] Catch `initialization-order-fiasco` in modules without globals (PR #104621)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/25/builds/1719

Here is the relevant piece of the build log for the reference:
```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/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: 85062 tests, 88 workers --
Testing:  0..
FAIL: Clang :: CodeGen/sanitize-ignorelist-mainfile.c (7505 of 85062)
******************** TEST 'Clang :: CodeGen/sanitize-ignorelist-mainfile.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: rm -rf /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp && split-file /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp && cd /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
+ rm -rf /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
+ split-file /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
+ cd /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
RUN: at line 3: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment a.c -o - | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,DEFAULT
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,DEFAULT
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment a.c -o -
RUN: at line 4: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment -fsanitize-ignorelist=a.list a.c -o - | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,IGNORE
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment -fsanitize-ignorelist=a.list a.c -o -
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,IGNORE
/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c:35:16: error: IGNORE-NOT: excluded string found in input
// IGNORE-NOT: @___asan_gen_
               ^
<stdin>:9:1: note: found here
@___asan_gen_ = private constant [4 x i8] c"a.c\00", align 1
^~~~~~~~~~~~~

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c

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

Input was:
<<<<<<
        1: ; ModuleID = 'a.c' 
        2: source_filename = "a.c" 
        3: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128" 
        4: target triple = "x86_64" 
        5:  
        6: @global_h = global i32 0, no_sanitize_address, align 4 
        7: @global_c = global i32 0, no_sanitize_address, align 4 
        8: @llvm.used = appending global [1 x ptr] [ptr @asan.module_ctor], section "llvm.metadata" 
        9: @___asan_gen_ = private constant [4 x i8] c"a.c\00", align 1 
Step 10 (stage2/ubsan check) failure: stage2/ubsan check (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/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: 85062 tests, 88 workers --
Testing:  0..
FAIL: Clang :: CodeGen/sanitize-ignorelist-mainfile.c (7505 of 85062)
******************** TEST 'Clang :: CodeGen/sanitize-ignorelist-mainfile.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: rm -rf /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp && split-file /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp && cd /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
+ rm -rf /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
+ split-file /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
+ cd /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
RUN: at line 3: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment a.c -o - | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,DEFAULT
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,DEFAULT
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment a.c -o -
RUN: at line 4: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment -fsanitize-ignorelist=a.list a.c -o - | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,IGNORE
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment -fsanitize-ignorelist=a.list a.c -o -
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,IGNORE
/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c:35:16: error: IGNORE-NOT: excluded string found in input
// IGNORE-NOT: @___asan_gen_
               ^
<stdin>:9:1: note: found here
@___asan_gen_ = private constant [4 x i8] c"a.c\00", align 1
^~~~~~~~~~~~~

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c

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

Input was:
<<<<<<
        1: ; ModuleID = 'a.c' 
        2: source_filename = "a.c" 
        3: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128" 
        4: target triple = "x86_64" 
        5:  
        6: @global_h = global i32 0, no_sanitize_address, align 4 
        7: @global_c = global i32 0, no_sanitize_address, align 4 
        8: @llvm.used = appending global [1 x ptr] [ptr @asan.module_ctor], section "llvm.metadata" 
        9: @___asan_gen_ = private constant [4 x i8] c"a.c\00", align 1 
Step 13 (stage3/ubsan check) failure: stage3/ubsan check (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:508: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/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: 82243 tests, 88 workers --
Testing:  0..
FAIL: Clang :: CodeGen/sanitize-ignorelist-mainfile.c (7472 of 82243)
******************** TEST 'Clang :: CodeGen/sanitize-ignorelist-mainfile.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: rm -rf /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp && split-file /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp && cd /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
+ rm -rf /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
+ split-file /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
+ cd /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/tools/clang/test/CodeGen/Output/sanitize-ignorelist-mainfile.c.tmp
RUN: at line 3: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment a.c -o - | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,DEFAULT
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment a.c -o -
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,DEFAULT
RUN: at line 4: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment -fsanitize-ignorelist=a.list a.c -o - | /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,IGNORE
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/lib/clang/20/include -nostdsysteminc -emit-llvm -triple x86_64 -fsanitize=address,alignment -fsanitize-ignorelist=a.list a.c -o -
+ /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build2_ubsan/bin/FileCheck /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c --check-prefixes=CHECK,IGNORE
/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c:35:16: error: IGNORE-NOT: excluded string found in input
// IGNORE-NOT: @___asan_gen_
               ^
<stdin>:9:1: note: found here
@___asan_gen_ = private constant [4 x i8] c"a.c\00", align 1
^~~~~~~~~~~~~

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/clang/test/CodeGen/sanitize-ignorelist-mainfile.c

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

Input was:
<<<<<<
        1: ; ModuleID = 'a.c' 
        2: source_filename = "a.c" 
        3: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128" 
        4: target triple = "x86_64" 
        5:  
        6: @global_h = global i32 0, no_sanitize_address, align 4 
        7: @global_c = global i32 0, no_sanitize_address, align 4 
        8: @llvm.used = appending global [1 x ptr] [ptr @asan.module_ctor], section "llvm.metadata" 
        9: @___asan_gen_ = private constant [4 x i8] c"a.c\00", align 1 

```

https://github.com/llvm/llvm-project/pull/104621