How to enable AddressSanitizer(ASan) for C++ Project

To integrate AddressSanitizer(ASan) to an existing project, just add the compile option -fsanitize=address and generate debug infor with -g in CMakeLists.txt.

option(ENABLE_ASAN "enable AddressSanitizer" OFF)

if(ENABLE_ASAN)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")
    set(CMAKE_CXX_FLAGS "-O -g")
    set(CMAKE_C_FLAGS "-O -g")
endif()

Compile the project:

mkdir build
cd build
cmake -DENABLE_ASAN=ON ..
cmake --build .

After the build, using following command to start the program:

ASAN_OPTIONS=detect_leaks=1 ./a.out

It will print detail info when memory leak occurs.

=================================================================
==12345==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x7f3d8b4fbb90 in __interceptor_new (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xde90)
    #1 0x4006d6 in createLeak /path/to/your/project/main.cpp:4
    #2 0x4006f8 in main /path/to/your/project/main.cpp:9
    #3 0x7f3d8b0d283f in __libc_start_main (/lib64/libc.so.6+0x2383f)

SUMMARY: AddressSanitizer: 40 byte(s) leaked in 1 allocation(s).