ClickHouse/dbms/tests/instructions/sanitizers.md

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# How to use Address Sanitizer
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Note: We use Address Sanitizer to run functional tests for every commit automatically.
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```
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mkdir build && cd build
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```
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Note:
ENABLE_TCMALLOC=0 is optional.
CC=clang CXX=clang++ is strongly recommended.
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```
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CC=clang CXX=clang++ cmake -D CMAKE_BUILD_TYPE=ASan -D ENABLE_TCMALLOC=0 ..
make -j24
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```
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## Copy binary to your server
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```
scp ./dbms/src/Server/clickhouse yourserver:~/clickhouse-asan
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```
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## Start ClickHouse and run tests
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```
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sudo -u clickhouse ./clickhouse-asan server --config /etc/clickhouse-server/config.xml
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```
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# How to use Thread Sanitizer
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```
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mkdir build && cd build
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```
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## Note: All parameters are mandatory.
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```
CC=clang CXX=clang++ cmake -D CMAKE_BUILD_TYPE=TSan -D ENABLE_TCMALLOC=0 ..
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make -j24
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```
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## Copy binary to your server
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```
scp ./dbms/src/Server/clickhouse yourserver:~/clickhouse-tsan
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```
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## Start ClickHouse and run tests
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```
sudo -u clickhouse TSAN_OPTIONS='halt_on_error=1' ./clickhouse-tsan server --config /etc/clickhouse-server/config.xml
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```
# How to use Memory Sanitizer
First, build libc++ with MSan:
```
svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
(cd llvm/projects && svn co http://llvm.org/svn/llvm-project/libcxx/trunk libcxx)
(cd llvm/projects && svn co http://llvm.org/svn/llvm-project/libcxxabi/trunk libcxxabi)
mkdir libcxx_msan && cd libcxx_msan
cmake ../llvm -DCMAKE_BUILD_TYPE=Release -DLLVM_USE_SANITIZER=Memory -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
make cxx -j24
```
Then, build ClickHouse:
```
mkdir build && cd build
```
```
CC=clang CXX=clang++ cmake -D CMAKE_BUILD_TYPE=MSan -D LIBCXX_PATH=/home/milovidov/libcxx_msan ..
```