Re: [dpdk-dev] [PATCH v6 1/2] Enable ASan for memory detector on DPDK

["Burakov, Anatoly" <anatoly.burakov@intel.com>]

On 30-Sep-21 1:59 PM, 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.
> 
> `AddressSanitizer
> <https://github.com/google/sanitizers/wiki/AddressSanitizer>` (ASan)
> is a widely-used debugging tool to detect memory access errors.
> It helps detect issues like use-after-free, various kinds of buffer
> overruns in C/C++ programs, and other similar errors, as well as
> printing out detailed debug information whenever an error is detected.
> 
> DPDK ASan functionality is currently only supported Linux x86_64.
> Support other platforms, need to define ASAN_SHADOW_OFFSET value
> according to google ASan document.
> 
> 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 add below compilation options when compiling code:
> -Dbuildtype=debug -Db_lundef=false -Db_sanitize=address
> "-Dbuildtype=debug": This is a non-essential option. When this option
> is added, if a memory error occurs, ASan can clearly show where the
> code is wrong.
> "-Db_lundef=false": When use clang to compile DPDK, this option must
> be added.
> 
> Signed-off-by: Xueqin Lin <xueqin.lin@intel.com>
> Signed-off-by: Zhihong Peng <zhihongx.peng@intel.com>
> ---

Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>

-- 
Thanks,
Anatoly