[clang] Revert "[Fuchsia] Stack analysis flags for runtimes" (PR #192515)

Sat Apr 18 14:51:39 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-s390x-linux-lnt` running on `systemz-1` while building `clang` at step 7 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/136/builds/7428

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

```
Step 7 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'libFuzzer-s390x-default-Linux :: fuzzer-timeout.test' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/lib/fuzzer  /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/TimeoutTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest # RUN: at line 1
+ /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/lib/fuzzer /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/TimeoutTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest
/home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/lib/fuzzer  /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/TimeoutEmptyTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutEmptyTest # RUN: at line 2
+ /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/lib/fuzzer /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/TimeoutEmptyTest.cpp -o /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutEmptyTest
not  /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 2>&1 | FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=TimeoutTest # RUN: at line 3
+ not /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1
+ FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=TimeoutTest
not  /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/hi.txt 2>&1 | FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=SingleInputTimeoutTest # RUN: at line 12
+ not /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/hi.txt
+ FileCheck /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/test/fuzzer/fuzzer-timeout.test --check-prefix=SingleInputTimeoutTest
/home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 -timeout_exitcode=0 # RUN: at line 16
+ /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/runtimes/runtimes-bins/compiler-rt/test/fuzzer/S390XDefaultLinuxConfig/Output/fuzzer-timeout.test.tmp-TimeoutTest -timeout=1 -timeout_exitcode=0
INFO: Running with entropic power schedule (0xFF, 100).
INFO: Seed: 1880462010
INFO: Loaded 1 modules   (13 inline 8-bit counters): 13 [0x2aa059d4e78, 0x2aa059d4e85), 
INFO: Loaded 1 PC tables (13 PCs): 13 [0x2aa059d4e88,0x2aa059d4f58), 
INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 4096 bytes
INFO: A corpus is not provided, starting from an empty corpus
#2	INITED cov: 2 ft: 2 corp: 1/1b exec/s: 0 rss: 31Mb
#2749	NEW    cov: 3 ft: 3 corp: 2/2b lim: 29 exec/s: 0 rss: 32Mb L: 1/1 MS: 2 ChangeByte-ChangeBit-
#2780	NEW    cov: 4 ft: 4 corp: 3/4b lim: 29 exec/s: 0 rss: 32Mb L: 2/2 MS: 1 CopyPart-
#6356	NEW    cov: 5 ft: 5 corp: 4/38b lim: 63 exec/s: 0 rss: 32Mb L: 34/34 MS: 1 InsertRepeatedBytes-
#6369	REDUCE cov: 5 ft: 5 corp: 4/23b lim: 63 exec/s: 0 rss: 32Mb L: 19/19 MS: 3 CopyPart-ChangeBit-EraseBytes-
#6397	REDUCE cov: 5 ft: 5 corp: 4/21b lim: 63 exec/s: 0 rss: 32Mb L: 17/17 MS: 3 InsertByte-ChangeBit-EraseBytes-
#6652	REDUCE cov: 5 ft: 5 corp: 4/18b lim: 63 exec/s: 0 rss: 32Mb L: 14/14 MS: 5 CrossOver-ChangeBinInt-ChangeBinInt-ShuffleBytes-EraseBytes-
#6703	REDUCE cov: 5 ft: 5 corp: 4/14b lim: 63 exec/s: 0 rss: 32Mb L: 10/10 MS: 1 EraseBytes-
#6765	REDUCE cov: 5 ft: 5 corp: 4/10b lim: 63 exec/s: 0 rss: 32Mb L: 6/6 MS: 2 ChangeBit-EraseBytes-
#6862	REDUCE cov: 5 ft: 5 corp: 4/9b lim: 63 exec/s: 0 rss: 32Mb L: 5/5 MS: 2 CopyPart-EraseBytes-
#6894	REDUCE cov: 5 ft: 5 corp: 4/7b lim: 63 exec/s: 0 rss: 32Mb L: 3/3 MS: 2 ChangeBit-EraseBytes-
#7406	REDUCE cov: 6 ft: 6 corp: 5/9b lim: 68 exec/s: 0 rss: 32Mb L: 2/3 MS: 2 ShuffleBytes-EraseBytes-
ALARM: working on the last Unit for 1 seconds
       and the timeout value is 1 (use -timeout=N to change)
MS: 1 InsertByte-; base unit: 94dd9e08c129c785f7f256e82fbe0a30e6d1ae40
0x48,0x69,0x21,
Hi!
artifact_prefix='./'; Test unit written to ./timeout-c0a0ad26a634840c67a210fefdda76577b03a111
Base64: SGkh
==1383288== ERROR: libFuzzer: timeout after 1 seconds
/home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/stage1/./bin/llvm-symbolizer: error: 'linux-vdso64.so.1': No such file or directory
    #0 0x02aa0594c935 in __sanitizer_print_stack_trace /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/lib/asan/asan_stack.cpp:87:3
    #1 0x02aa05879ef7 in fuzzer::PrintStackTrace() /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/lib/fuzzer/FuzzerUtil.cpp:210:5
    #2 0x02aa05854fbb in fuzzer::Fuzzer::AlarmCallback() /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:304:5
    #3 0x03ffa0bfe47f  (linux-vdso64.so.1+0x47f) (BuildId: a1b6aba4744d6ee54c7f0d15adfbce69f31e46e9)
    #4 0x02aa05877921 in Popcountll /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/lib/fuzzer/FuzzerBuiltins.h:29:54
    #5 0x02aa05877921 in HandleCmp<unsigned int> /home/uweigand/sandbox/buildbot/clang-s390x-linux-lnt/llvm/compiler-rt/lib/fuzzer/FuzzerTracePC.cpp:392:30
...

```

</details>

https://github.com/llvm/llvm-project/pull/192515