[clang] [clang][ssaf] Add UnsafeBufferUsage summary extractor for functions (PR #182941)

Wed Mar 11 11:55:20 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-x86_64-linux-abi-test` running on `sie-linux-worker2` while building `clang` at step 6 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/8/builds/28176

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

```
Step 6 (build-unified-tree) failure: build (failure)
...
264.063 [1049/10/6548] Linking CXX executable bin/llvm-objcopy
264.066 [1048/10/6549] Generating ../../bin/llvm-bitcode-strip
264.068 [1047/10/6550] Generating ../../bin/llvm-install-name-tool
264.071 [1046/10/6551] Generating ../../bin/llvm-strip
264.127 [1045/10/6552] Building CXX object tools/llvm-objdump/CMakeFiles/llvm-objdump.dir/OffloadDump.cpp.o
264.127 [1044/10/6553] Building CXX object tools/llvm-objdump/CMakeFiles/llvm-objdump.dir/WasmDump.cpp.o
264.173 [1043/10/6554] Building CXX object tools/llvm-objdump/CMakeFiles/llvm-objdump.dir/llvm-objdump-driver.cpp.o
264.193 [1042/10/6555] Building CXX object tools/llvm-objdump/CMakeFiles/llvm-objdump.dir/XCOFFDump.cpp.o
264.234 [1041/10/6556] Building CXX object tools/llvm-offload-binary/CMakeFiles/llvm-offload-binary.dir/llvm-offload-binary.cpp.o
264.653 [1040/10/6557] Building CXX object tools/clang/unittests/Analysis/Scalable/CMakeFiles/ClangScalableAnalysisTests.dir/Analyses/UnsafeBufferUsage/UnsafeBufferUsageTest.cpp.o
FAILED: tools/clang/unittests/Analysis/Scalable/CMakeFiles/ClangScalableAnalysisTests.dir/Analyses/UnsafeBufferUsage/UnsafeBufferUsageTest.cpp.o 
/opt/ccache/bin/g++ -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/buildbot-root/abi-test/build/tools/clang/unittests/Analysis/Scalable -I/home/buildbot/buildbot-root/abi-test/llvm/clang/unittests/Analysis/Scalable -I/home/buildbot/buildbot-root/abi-test/llvm/clang/include -I/home/buildbot/buildbot-root/abi-test/build/tools/clang/include -I/home/buildbot/buildbot-root/abi-test/build/include -I/home/buildbot/buildbot-root/abi-test/llvm/llvm/include -I/home/buildbot/buildbot-root/abi-test/llvm/third-party/unittest/googletest/include -I/home/buildbot/buildbot-root/abi-test/llvm/third-party/unittest/googlemock/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-array-bounds -Wno-stringop-overread -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -O3 -DNDEBUG -UNDEBUG -Wno-variadic-macros -fno-exceptions -funwind-tables -fno-rtti -Wno-suggest-override -std=c++17 -MD -MT tools/clang/unittests/Analysis/Scalable/CMakeFiles/ClangScalableAnalysisTests.dir/Analyses/UnsafeBufferUsage/UnsafeBufferUsageTest.cpp.o -MF tools/clang/unittests/Analysis/Scalable/CMakeFiles/ClangScalableAnalysisTests.dir/Analyses/UnsafeBufferUsage/UnsafeBufferUsageTest.cpp.o.d -o tools/clang/unittests/Analysis/Scalable/CMakeFiles/ClangScalableAnalysisTests.dir/Analyses/UnsafeBufferUsage/UnsafeBufferUsageTest.cpp.o -c /home/buildbot/buildbot-root/abi-test/llvm/clang/unittests/Analysis/Scalable/Analyses/UnsafeBufferUsage/UnsafeBufferUsageTest.cpp
/home/buildbot/buildbot-root/abi-test/llvm/clang/unittests/Analysis/Scalable/Analyses/UnsafeBufferUsage/UnsafeBufferUsageTest.cpp:62:13: error: declaration of ‘clang::ssaf::TUSummary {anonymous}::UnsafeBufferUsageTest::TUSummary’ changes meaning of ‘TUSummary’ [-fpermissive]
   62 |   TUSummary TUSummary;
      |             ^~~~~~~~~
In file included from /home/buildbot/buildbot-root/abi-test/llvm/clang/unittests/Analysis/Scalable/Analyses/UnsafeBufferUsage/UnsafeBufferUsageTest.cpp:15:
/home/buildbot/buildbot-root/abi-test/llvm/clang/include/clang/Analysis/Scalable/TUSummary/TUSummary.h:24:7: note: ‘TUSummary’ declared here as ‘class clang::ssaf::TUSummary’
   24 | class TUSummary {
      |       ^~~~~~~~~
/home/buildbot/buildbot-root/abi-test/llvm/clang/unittests/Analysis/Scalable/Analyses/UnsafeBufferUsage/UnsafeBufferUsageTest.cpp:63:20: error: declaration of ‘clang::ssaf::TUSummaryBuilder {anonymous}::UnsafeBufferUsageTest::TUSummaryBuilder’ changes meaning of ‘TUSummaryBuilder’ [-fpermissive]
   63 |   TUSummaryBuilder TUSummaryBuilder;
      |                    ^~~~~~~~~~~~~~~~
In file included from /home/buildbot/buildbot-root/abi-test/llvm/clang/include/clang/Analysis/Scalable/Analyses/UnsafeBufferUsage/UnsafeBufferUsageExtractor.h:14,
                 from /home/buildbot/buildbot-root/abi-test/llvm/clang/unittests/Analysis/Scalable/Analyses/UnsafeBufferUsage/UnsafeBufferUsageTest.cpp:12:
/home/buildbot/buildbot-root/abi-test/llvm/clang/include/clang/Analysis/Scalable/TUSummary/TUSummaryBuilder.h:22:7: note: ‘TUSummaryBuilder’ declared here as ‘class clang::ssaf::TUSummaryBuilder’
   22 | class TUSummaryBuilder {
      |       ^~~~~~~~~~~~~~~~
264.700 [1040/9/6558] Linking CXX executable bin/llvm-mca
265.067 [1040/8/6559] Linking CXX executable bin/llvm-offload-binary
265.214 [1040/7/6560] Linking CXX executable bin/llvm-gsymutil
265.634 [1040/6/6561] Linking CXX executable bin/llvm-ml
266.175 [1040/5/6562] Linking CXX executable bin/llvm-nm
266.547 [1040/4/6563] Linking CXX executable bin/llvm-objdump
267.277 [1040/3/6564] Linking CXX executable bin/llvm-ir2vec
268.037 [1040/2/6565] Linking CXX executable tools/clang/unittests/AllClangUnitTests
268.963 [1040/1/6566] Linking CXX executable bin/llvm-lto2
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/182941