hsbench: add Hyperscan benchmarker

The hsbench tool provides an easy way to measure Hyperscan's
performance for a particular set of patterns and corpus of data
to be scanned.

tools/hsbench/CMakeLists.txt

@@ -0,0 +1,36 @@
+include (${CMAKE_MODULE_PATH}/sqlite3.cmake)
+
+if (NOT XCODE)
+    include_directories(SYSTEM ${SQLITE3_INCLUDE_DIRS})
+else()
+    # cmake doesn't think Xcode supports isystem
+    set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -isystem ${SQLITE3_INCLUDE_DIRS}")
+endif()
+
+CHECK_FUNCTION_EXISTS(malloc_info HAVE_MALLOC_INFO)
+CHECK_FUNCTION_EXISTS(shmget HAVE_SHMGET)
+set(HAVE_SHMGET ${HAVE_SHMGET} CACHE BOOL "shmget()")
+
+# only set these after all tests are done
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_C_FLAGS}")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${EXTRA_CXX_FLAGS}")
+
+
+SET(hsbench_SOURCES
+    common.h
+    data_corpus.cpp
+    data_corpus.h
+    engine_hyperscan.cpp
+    engine_hyperscan.h
+    heapstats.cpp
+    heapstats.h
+    huge.cpp
+    huge.h
+    main.cpp
+    thread_barrier.h
+    timer.h
+)
+
+add_executable(hsbench ${hsbench_SOURCES})
+target_link_libraries(hsbench hs databaseutil expressionutil ${SQLITE3_LDFLAGS}
+    ${CMAKE_THREAD_LIBS_INIT})