[compiler-rt] [compiler-rt][rtsan] Fix #123484 for glibc < 2.21 (PR #123664)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

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

Author: David CARLIER (devnexen)

<details>
<summary>Changes</summary>

linux/glibc prior to 2.21 had a different signature for recvmmsg.

---
Full diff: https://github.com/llvm/llvm-project/pull/123664.diff


1 Files Affected:

- (modified) compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp (+5) 


``````````diff
diff --git a/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp b/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
index 34c2d4cb37fd0c..2d8ab696835081 100644
--- a/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
+++ b/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
@@ -927,8 +927,13 @@ INTERCEPTOR(ssize_t, recvmsg, int socket, struct msghdr *message, int flags) {
 }
 
 #if SANITIZER_INTERCEPT_RECVMMSG
+#if defined(__GLIBC_MINOR__) && __GLIBC_MINOR__ < 21
+INTERCEPTOR(int, recvmmsg, int socket, struct mmsghdr *message,
+            unsigned int len, int flags, const struct timespec *timeout) {
+#else
 INTERCEPTOR(int, recvmmsg, int socket, struct mmsghdr *message,
             unsigned int len, int flags, struct timespec *timeout) {
+#endif
   __rtsan_notify_intercepted_call("recvmmsg");
   return REAL(recvmmsg)(socket, message, len, flags, timeout);
 }

``````````

</details>


https://github.com/llvm/llvm-project/pull/123664