How to use AddressSanitizer with GCC?
I'm trying to build my project with
g++ -O0 -g -fsanitize=address -fno-omit-frame-pointer
but get lots of errors like:
/home/user/libs/opencv/include/opencv2/core/mat.hpp:715: undefined reference to `__asan_report_load8'
How to compile project with AddressSanitize support?
My gcc version is 4.8.4.
Solution 1:
You need to add -fsanitize=address
to compiler flags (both CFLAGS
and CXXFLAGS
) and linker flags (LDFLAGS
). You've probably added it to your compiler flags only.
Note that using explicit -lasan
option has been widely discouraged by ASan developers (e.g. here) as it misses some other important linker flags. The only recommended way to link is to use -fsanitize=address
.
As a side note, for more aggressive verification flags check Asan FAQ (look for "more aggressive diagnostics").
Solution 2:
Make sure you have libasan installed. For example, in Fedora:
dnf install libasan libasan-static
Solution 3:
You need to add the switch -lasan
-fsanitize=address
to your both your compile and link command line to link the correct library.
Note: the original answer -lasan is outdated and should not be used, as per comments