[compiler-rt] [ubsan-minimal] Switch to weak symbols for callbacks to allow overriding in client code (PR #119242)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: Kirill Stoimenov (kstoimenov)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/119242.diff


1 Files Affected:

- (modified) compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp (+3-2) 


``````````diff
diff --git a/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp b/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp
index 53a3273e4e6980..aa91a66cb6d32e 100644
--- a/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp
+++ b/compiler-rt/lib/ubsan_minimal/ubsan_minimal_handlers.cpp
@@ -97,8 +97,9 @@ constexpr unsigned kAddrBuf = SANITIZER_WORDSIZE / 4;
 #define MSG_BUF_LEN(msg) (sizeof(MSG_TMPL(msg)) + kAddrBuf + 1)
 
 #define HANDLER_RECOVER(name, msg)                               \
-  INTERFACE void __ubsan_handle_##name##_minimal() {             \
-    uintptr_t caller = GET_CALLER_PC();                  \
+  SANITIZER_INTERFACE_WEAK_DEF(                                  \
+    void, __ubsan_handle_##name##_minimal, void) {               \
+    uintptr_t caller = GET_CALLER_PC();                          \
     if (!report_this_error(caller)) return;                      \
     char msg_buf[MSG_BUF_LEN(msg)] = MSG_TMPL(msg);              \
     decorate_msg(MSG_TMPL_END(msg_buf, msg), caller);            \

``````````

</details>


https://github.com/llvm/llvm-project/pull/119242