On Thu, Jun 10, 2021 at 01:13:52PM +0800, zhihongx.peng@intel.com wrote:

From: Zhihong Peng <redacted>

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