[clang] [lld] [llvm] Reland "Compute GUIDs once and store in metadata" (#184065) (PR #201849)

Tue Jul 7 16:53:15 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-gcc-ubuntu` running on `sie-linux-worker3` while building `clang,lld,llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/174/builds/37887

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'libFuzzer-x86_64-default-Linux :: symbolize-deadlock.test' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/./bin/clang   -m64  --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/SymbolizeDeadlock.cpp -o /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/symbolize-deadlock.test.tmp
# executed command: /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/./bin/clang -m64 --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/SymbolizeDeadlock.cpp -o /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/symbolize-deadlock.test.tmp
# note: command had no output on stdout or stderr
# RUN: at line 2
not  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/symbolize-deadlock.test.tmp -rss_limit_mb=20 2>&1
# executed command: not /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/symbolize-deadlock.test.tmp -rss_limit_mb=20
# .---command stdout------------
# | INFO: Running with entropic power schedule (0xFF, 100).
# | INFO: Seed: 817533373
# | INFO: Loaded 1 modules   (10 inline 8-bit counters): 10 [0x558156653e48, 0x558156653e52), 
# | INFO: Loaded 1 PC tables (10 PCs): 10 [0x558156653e58,0x558156653ef8), 
# | 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: 101Mb
# | #4	NEW    cov: 3 ft: 3 corp: 2/4b lim: 4 exec/s: 0 rss: 101Mb L: 3/3 MS: 2 CrossOver-CrossOver-
# | #572	NEW    cov: 4 ft: 4 corp: 3/12b lim: 8 exec/s: 0 rss: 101Mb L: 8/8 MS: 3 InsertRepeatedBytes-ChangeBinInt-ShuffleBytes-
# | #599	REDUCE cov: 4 ft: 4 corp: 3/9b lim: 8 exec/s: 0 rss: 101Mb L: 5/5 MS: 2 CopyPart-CrossOver-
# | #745	REDUCE cov: 4 ft: 4 corp: 3/7b lim: 8 exec/s: 0 rss: 101Mb L: 3/3 MS: 1 EraseBytes-
# | #37395	REDUCE cov: 5 ft: 5 corp: 4/11b lim: 365 exec/s: 0 rss: 101Mb L: 4/4 MS: 5 EraseBytes-ChangeBit-CopyPart-ShuffleBytes-CopyPart-
# | #37666	REDUCE cov: 5 ft: 5 corp: 4/10b lim: 365 exec/s: 0 rss: 101Mb L: 3/3 MS: 1 EraseBytes-
# | 	NEW_FUNC[1/1]: 0x558156606550 in aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
# | #50692	REDUCE cov: 9 ft: 9 corp: 5/14b lim: 493 exec/s: 0 rss: 101Mb L: 4/4 MS: 1 InsertByte-
# | ==2638296== ERROR: libFuzzer: out-of-memory (used: 101Mb; limit: 20Mb)
# |    To change the out-of-memory limit use -rss_limit_mb=<N>
# | 
# | Live Heap Allocations: 24465951 bytes in 74 chunks; quarantined: 1195178 bytes in 52444 chunks; 17561 other chunks; total chunks: 70079; showing top 95% (at most 8 unique contexts)
# | 21233984 byte(s) (86%) in 1 allocation(s)
# |     #0 0x55815660515d in operator new(unsigned long) /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/asan/asan_new_delete.cpp:109:35
# |     #1 0x5581564e821a in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:822:18
# |     #2 0x5581565161c2 in main /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
# |     #3 0x7fa082b0e082 in __libc_start_main /build/glibc-B3wQXB/glibc-2.31/csu/../csu/libc-start.c:308:16
# | 
# | 3148000 byte(s) (12%) in 1 allocation(s)
# |     #0 0x55815660515d in operator new(unsigned long) /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/asan/asan_new_delete.cpp:109:35
# |     #1 0x5581564e81f4 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:821:14
# |     #2 0x5581565161c2 in main /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
# |     #3 0x7fa082b0e082 in __libc_start_main /build/glibc-B3wQXB/glibc-2.31/csu/../csu/libc-start.c:308:16
# | 
# | MS: 2 ShuffleBytes-ChangeByte-
# `-----------------------------
# error: command failed with exit status: 1

--

...

```

</details>

https://github.com/llvm/llvm-project/pull/201849