-----Original Message-----
From: Peng, ZhihongX <redacted>
Sent: Tuesday, October 19, 2021 6:12 PM
To: david.marchand@redhat.com; Burakov, Anatoly
[off-list ref]; Ananyev, Konstantin
[off-list ref]; stephen@networkplumber.org;
Dumitrescu, Cristian [off-list ref]; Mcnamara, John
[off-list ref]; Richardson, Bruce
[off-list ref]
Cc: dev@dpdk.org; Lin, Xueqin <redacted>; Peng, ZhihongX
[off-list ref]
Subject: [PATCH v11 1/4] Enable ASan for memory detector on DPDK

From: Zhihong Peng <redacted>

`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.

We can enable ASan by adding below compilation options:
-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 <redacted>
Signed-off-by: Zhihong Peng <redacted>
---
v7: 1) Split doc and code into two.
    2) Modify asan.rst doc
v8: No change.
v9: 1) Add the check of libasan library.
    2) Add release notes.
v10:1) Split doc and code into two.
    2) Meson supports asan.
v11:Modify the document.
---
 config/meson.build                     | 16 +++++++++++
 devtools/words-case.txt                |  1 +
 doc/guides/prog_guide/asan.rst         | 40 ++++++++++++++++++++++++++
 doc/guides/prog_guide/index.rst        |  1 +
 doc/guides/rel_notes/release_21_11.rst |  9 ++++++
 5 files changed, 67 insertions(+)
 create mode 100644 doc/guides/prog_guide/asan.rst

diff --git a/config/meson.build b/config/meson.build index

4cdf589e20..f02b0e9c6d 100644

--- a/config/meson.build
+++ b/config/meson.build

@@ -411,6 +411,22 @@ if get_option('b_lto')
     endif
 endif

+if get_option('b_sanitize') == 'address' or get_option('b_sanitize') ==

'address,undefined'
+    if is_windows
+        error('ASan is not supported on windows')
+    endif
+
+    if cc.get_id() == 'gcc'
+        asan_dep = cc.find_library('asan', required: true)
+        if (not cc.links('int main(int argc, char *argv[]) { return 0; }',
+                dependencies: asan_dep))
+            error('broken dependency, "libasan"')
+        endif
+        add_project_link_arguments('-lasan', language: 'c')
+        dpdk_extra_ldflags += '-lasan'
+    endif
+endif
+
 if get_option('default_library') == 'both'
     error( '''
  Unsupported value "both" for "default_library" option.

diff --git a/devtools/words-case.txt b/devtools/words-case.txt index

0bbad48626..ada6910fa0 100644

--- a/devtools/words-case.txt
+++ b/devtools/words-case.txt

@@ -5,6 +5,7 @@ API
 Arm
 armv7
 armv8
+ASan
 BAR
 CRC
 DCB

diff --git a/doc/guides/prog_guide/asan.rst

b/doc/guides/prog_guide/asan.rst new file mode 100644 index
0000000000..969676ebe8

--- /dev/null
+++ b/doc/guides/prog_guide/asan.rst

@@ -0,0 +1,40 @@
+.. SPDX-License-Identifier: BSD-3-Clause
+   Copyright(c) 2021 Intel Corporation
+
+Running Address Sanitizer
+=========================
+
+`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.
+
+AddressSanitizer is a part of LLVM (3.1+) and GCC (4.8+).
+
+Usage
+-----
+
+meson build
+^^^^^^^^^^^
+
+To enable ASan in meson build system, use following meson build

command:
+
+Example usage::
+
+* gcc::
+
+      meson build -Dbuildtype=debug -Db_sanitize=address
+      ninja -C build
+
+* clang::
+
+      meson build -Dbuildtype=debug -Db_lundef=false -Db_sanitize=address
+      ninja -C build
+
+.. Note::
+
+  a) To compile with gcc in centos, libasan needs to be installed separately.
+  b) If the program being tested uses cmdline you will need to execute the
+     "stty echo" command when a error occurs.

diff --git a/doc/guides/prog_guide/index.rst

b/doc/guides/prog_guide/index.rst index 89af28dacb..561d787fcf 100644

--- a/doc/guides/prog_guide/index.rst
+++ b/doc/guides/prog_guide/index.rst

@@ -72,3 +72,4 @@ Programmer's Guide
     lto
     profile_app
     glossary
+    asan

diff --git a/doc/guides/rel_notes/release_21_11.rst

b/doc/guides/rel_notes/release_21_11.rst
index d5435a64aa..1fa8eb3368 100644

--- a/doc/guides/rel_notes/release_21_11.rst
+++ b/doc/guides/rel_notes/release_21_11.rst

@@ -167,6 +167,15 @@ New Features
   * Added tests to verify tunnel header verification in IPsec inbound.
   * Added tests to verify inner checksum.

+* **Enable ASan for memory detector on DPDK.**
+
+  `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.
+

 Removed Items
 -------------
--

2.25.1