[clang] [llvm] Introduce a new WebKit checker for a unchecked local variable (PR #113708)

LLVM Continuous Integration via cfe-commits cfe-commits at lists.llvm.org
Fri Nov 1 00:45:22 PDT 2024 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux` running on `sanitizer-buildbot1` while building `clang,llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/66/builds/5630

<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/build/llvm-project/compiler-rt/test/lit.common.cfg.py:246: warning: COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=ON, but this test suite does not support testing the just-built runtime libraries when the test compiler is configured to use different runtime libraries. Either modify this test suite to support this test configuration, or set COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=OFF to test the runtime libraries included in the compiler instead.
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:257: note: Testing using libraries in "/home/b/sanitizer-x86_64-linux/build/build_default/./lib/../lib/clang/20/lib/i386-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:235: warning: Compiler lib dir != compiler-rt lib dir
Compiler libdir:     "/home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/i386-unknown-linux-gnu"
compiler-rt libdir:  "/home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/x86_64-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:246: warning: COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=ON, but this test suite does not support testing the just-built runtime libraries when the test compiler is configured to use different runtime libraries. Either modify this test suite to support this test configuration, or set COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=OFF to test the runtime libraries included in the compiler instead.
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:257: note: Testing using libraries in "/home/b/sanitizer-x86_64-linux/build/build_default/./lib/../lib/clang/20/lib/x86_64-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/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: 4720 of 10477 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90
FAIL: libFuzzer-x86_64-default-Linux :: reduce_inputs.test (4374 of 4720)
******************** TEST 'libFuzzer-x86_64-default-Linux :: reduce_inputs.test' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 3: rm -rf /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C
+ rm -rf /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C
RUN: at line 4: mkdir -p /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C
+ mkdir -p /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C
RUN: at line 5: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/fuzzer -m64 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/ShrinkControlFlowSimpleTest.cpp -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowSimpleTest
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/fuzzer -m64 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/ShrinkControlFlowSimpleTest.cpp -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowSimpleTest
RUN: at line 6: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/fuzzer -m64 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/ShrinkControlFlowTest.cpp -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowTest
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/fuzzer -m64 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/ShrinkControlFlowTest.cpp -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowTest
RUN: at line 7: /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowSimpleTest  -exit_on_item=0eb8e4ed029b774d80f2b66408203801cb982a60   -runs=1000000 /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C 2>&1 | FileCheck /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/reduce_inputs.test
+ FileCheck /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/reduce_inputs.test
+ /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowSimpleTest -exit_on_item=0eb8e4ed029b774d80f2b66408203801cb982a60 -runs=1000000 /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C
/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/reduce_inputs.test:8:8: error: CHECK: expected string not found in input
CHECK: INFO: found item with checksum '0eb8e4ed029b774d80f2b66408203801cb982a60'
       ^
<stdin>:1:1: note: scanning from here
INFO: Running with entropic power schedule (0xFF, 100).
^

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/reduce_inputs.test

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

Input was:
<<<<<<
         1: INFO: Running with entropic power schedule (0xFF, 100). 
check:8     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
         2: INFO: Seed: 3546511603 
check:8     ~~~~~~~~~~~~~~~~~~~~~~~
         3: INFO: Loaded 1 modules (6 inline 8-bit counters): 6 [0x5b2169520048, 0x5b216952004e),  
check:8     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         4: INFO: Loaded 1 PC tables (6 PCs): 6 [0x5b2169520050,0x5b21695200b0),  
check:8     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Step 11 (test compiler-rt debug) failure: test compiler-rt debug (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:246: warning: COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=ON, but this test suite does not support testing the just-built runtime libraries when the test compiler is configured to use different runtime libraries. Either modify this test suite to support this test configuration, or set COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=OFF to test the runtime libraries included in the compiler instead.
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:257: note: Testing using libraries in "/home/b/sanitizer-x86_64-linux/build/build_default/./lib/../lib/clang/20/lib/i386-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:235: warning: Compiler lib dir != compiler-rt lib dir
Compiler libdir:     "/home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/i386-unknown-linux-gnu"
compiler-rt libdir:  "/home/b/sanitizer-x86_64-linux/build/build_default/lib/clang/20/lib/x86_64-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:246: warning: COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=ON, but this test suite does not support testing the just-built runtime libraries when the test compiler is configured to use different runtime libraries. Either modify this test suite to support this test configuration, or set COMPILER_RT_TEST_STANDALONE_BUILD_LIBS=OFF to test the runtime libraries included in the compiler instead.
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/lit.common.cfg.py:257: note: Testing using libraries in "/home/b/sanitizer-x86_64-linux/build/build_default/./lib/../lib/clang/20/lib/x86_64-unknown-linux-gnu"
llvm-lit: /home/b/sanitizer-x86_64-linux/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: 4720 of 10477 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90
FAIL: libFuzzer-x86_64-default-Linux :: reduce_inputs.test (4374 of 4720)
******************** TEST 'libFuzzer-x86_64-default-Linux :: reduce_inputs.test' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 3: rm -rf /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C
+ rm -rf /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C
RUN: at line 4: mkdir -p /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C
+ mkdir -p /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C
RUN: at line 5: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/fuzzer -m64 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/ShrinkControlFlowSimpleTest.cpp -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowSimpleTest
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/fuzzer -m64 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/ShrinkControlFlowSimpleTest.cpp -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowSimpleTest
RUN: at line 6: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/fuzzer -m64 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/ShrinkControlFlowTest.cpp -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowTest
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/fuzzer -m64 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/ShrinkControlFlowTest.cpp -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowTest
RUN: at line 7: /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowSimpleTest  -exit_on_item=0eb8e4ed029b774d80f2b66408203801cb982a60   -runs=1000000 /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C 2>&1 | FileCheck /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/reduce_inputs.test
+ FileCheck /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/reduce_inputs.test
+ /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp-ShrinkControlFlowSimpleTest -exit_on_item=0eb8e4ed029b774d80f2b66408203801cb982a60 -runs=1000000 /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/reduce_inputs.test.tmp/C
/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/reduce_inputs.test:8:8: error: CHECK: expected string not found in input
CHECK: INFO: found item with checksum '0eb8e4ed029b774d80f2b66408203801cb982a60'
       ^
<stdin>:1:1: note: scanning from here
INFO: Running with entropic power schedule (0xFF, 100).
^

Input file: <stdin>
Check file: /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/fuzzer/reduce_inputs.test

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

Input was:
<<<<<<
         1: INFO: Running with entropic power schedule (0xFF, 100). 
check:8     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
         2: INFO: Seed: 3546511603 
check:8     ~~~~~~~~~~~~~~~~~~~~~~~
         3: INFO: Loaded 1 modules (6 inline 8-bit counters): 6 [0x5b2169520048, 0x5b216952004e),  
check:8     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         4: INFO: Loaded 1 PC tables (6 PCs): 6 [0x5b2169520050,0x5b21695200b0),  
check:8     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

```

</details>

https://github.com/llvm/llvm-project/pull/113708

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