patches: support instrumenting dlmalloc by ASAN

The patch add a patch that implements support of AddressSanitizer
in LuaJIT's dlmalloc. The work has been done by Maksim Tiushev in
Tarantool Lab.

By default instrumentation is disabled and it can be enabled
by passing a flag LUAJIT_USE_ASAN.

Author: ligurio

cmake/BuildLuaJIT.cmake

@@ -13,7 +13,7 @@ macro(build_luajit LJ_VERSION)
     set(CFLAGS "${CFLAGS} -fsanitize=fuzzer-no-link")
     set(LDFLAGS "-fsanitize=fuzzer-no-link")
 
-    set(LUAJIT_PATCH_PATH ${PROJECT_SOURCE_DIR}/patches/luajit-v2.1.patch)
+    set(LUAJIT_BASEDIR ${PROJECT_SOURCE_DIR}/patches/)
 
     if (CMAKE_BUILD_TYPE STREQUAL "Debug")
         set(CFLAGS "${CFLAGS} ${CMAKE_C_FLAGS_DEBUG}")
@@ -99,7 +99,9 @@ macro(build_luajit LJ_VERSION)
         TMP_DIR ${LJ_BINARY_DIR}/tmp
         STAMP_DIR ${LJ_BINARY_DIR}/stamp
 
-        PATCH_COMMAND git reset --hard && cd <SOURCE_DIR> && patch -p1 -i ${LUAJIT_PATCH_PATH}
+        PATCH_COMMAND git reset --hard && cd <SOURCE_DIR> &&
+                      patch -p1 -i ${LUAJIT_BASEDIR}/luajit-v2.1.patch &&
+                      patch -p1 -i ${LUAJIT_BASEDIR}/luajit-dmalloc-asan_instr-v2.1.patch
         CONFIGURE_COMMAND ""
         BUILD_COMMAND cd <SOURCE_DIR> && make -j CC=${CMAKE_C_COMPILER}
                                                  CFLAGS=${CFLAGS}