Re: [dpdk-dev] [RFC] porting AddressSanitizer feature to DPDK

[Bruce Richardson <bruce.richardson@intel.com>]

On Thu, Jun 10, 2021 at 01:13:52PM +0800, zhihongx.peng@intel.com wrote:
> From: Zhihong Peng <zhihongx.peng@intel.com>
> 
> AddressSanitizer (ASan) is a google memory error detect
> standard tool. It could help to detect use-after-free and
> {heap,stack,global}-buffer overflow bugs in C/C++ programs,
> print detailed error information when error happens, large
> improve debug efficiency.
> 
> By referring to its implementation algorithm
> (https://github.com/google/sanitizers/wiki/AddressSanitizerAlgorithm),
> ported heap-buffer-overflow and use-after-freefunctions to dpdk.
> 
> Here is an example of heap-buffer-overflow bug:
> 	......
>         char *p = rte_zmalloc(NULL, 7, 0);
>         p[7] = 'a';
> 	......
> 
> Here is an example of use-after-free bug:
> 	......
>         char *p = rte_zmalloc(NULL, 7, 0);
>         rte_free(p);
>         *p = 'a';
> 	......
> 
> If you want to use this feature,
> you need to use the following compilation options:
> -Dc_args='-DRTE_MALLOC_ASAN'
> -Db_lundef=false -Db_sanitize=address
> 
Rather than forcing the user to pass in the extra c_args, you can
automatically add it from the eal/meson.build files. Something like:

if get_option('b_sanitize').startswith('address'):
	cflags += '-DRTE_MALLOC_ASAN'
endif

/Bruce