[ASAN] Enable detect_odr_violation=2

The ASAN flag for detecting ODR violations has been set to its **++default++** value (2).
commit_hash:7475c1eb748fa0704d3db551189591c87ce5357d

build/scripts/fix_py2_protobuf.py

@@ -22,6 +22,17 @@ def gen_renames_1(d):
 
 def gen_renames_2(p, d):
     for s in gen_renames_1(d):
+        """
+        Since clang-17, the option -fsanitize-address-globals-dead-stripping
+        has been enabled by default. Due to this, we have broken optimization
+        that merges calls to the `asan.module_ctor` function, as we are renaming
+        symbols with a prefix of 'py2_'. When this flag is enabled, and
+        the functions are not merged, false-positive ODR (One Definition Rule)
+        violations occur on objects such as `typeinfo std::exception`, because
+        the runtime is trying to handle global objects that have already been handled.
+        """
+        if 'asan_globals' in s:
+            continue
         yield s + ' ' + p + s
 
 

contrib/libs/clang18-rt/lib/asan/asan_flags.inc

@@ -147,7 +147,7 @@ ASAN_FLAG(bool, detect_container_overflow, true,
           "If true, honor the container overflow annotations. See "
           "https://github.com/google/sanitizers/wiki/"
           "AddressSanitizerContainerOverflow")
-ASAN_FLAG(int, detect_odr_violation, 1,
+ASAN_FLAG(int, detect_odr_violation, 2,
           "If >=2, detect violation of One-Definition-Rule (ODR); "
           "If ==1, detect ODR-violation only if the two variables "
           "have different sizes")