[RFC 0/1] support ThreadSanitizer

[RFC 0/1] support ThreadSanitizer

[Dengdui Huang]

When I tried to enable TSan on DPDK using this patch, DPDK cannot be initialized.

When the DPDK initializes the memseg, a large number of address space is reserved.
However, The introduction of ThreadSanitizer brings a large amount of memory overhead.
As a result, the address space is insufficient and the DPDK cannot be initialized.

I fixed it by changing the value of the macro RTE_MAX_MEM_MB,
but I know that's not a good idea. Suggestions are welcome.

Dengdui Huang (1):
  build: support ThreadSanitizer

 config/meson.build | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

-- 
2.33.0

[RFC 1/1] build: support ThreadSanitizer

[Dengdui Huang]

ThreadSanitizer is a tool that detects data races. It consists of a
compiler instrumentation module and a run-time library.
Typical slowdown introduced by ThreadSanitizer is about 5x-15x.
Typical memory overhead introduced by ThreadSanitizer is about 5x-10x.

UBSan is integrated with gcc and clang and can be enabled via a meson
option: -Db_sanitize=thread.

Signed-off-by: Dengdui Huang <huangdengdui@huawei.com>
---
 config/meson.build | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/config/meson.build b/config/meson.build
index f31fef216c..dca1e2b5a4 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -519,6 +519,20 @@ if get_option('b_sanitize') == 'address' or get_option('b_sanitize') == 'address
     endif
 endif
 
+if get_option('b_sanitize') == 'thread'
+    if is_windows
+        error('TSan is not supported on windows')
+    endif
+
+    if cc.get_id() == 'gcc'
+        tsan_dep = cc.find_library('tsan', required: true)
+        if (not cc.links('int main(int argc, char *argv[]) { return 0; }',
+                dependencies: tsan_dep))
+            error('broken dependency, "libtsan"')
+        endif
+    endif
+endif
+
 if get_option('default_library') == 'both'
     error( '''
  Unsupported value "both" for "default_library" option.
-- 
2.33.0