[compiler-rt][rtsan] intercept accept4 syscall.

[devnexen]

No description provided.

[llvmbot]

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

Author: David CARLIER (devnexen)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/117278.diff

1 Files Affected:

• (modified) compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp (+11)

diff --git a/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp b/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
index 91d023e858ba3b..47dd94852ff3c2 100644
--- a/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
+++ b/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
@@ -643,6 +643,14 @@ INTERCEPTOR(int, shutdown, int socket, int how) {
   return REAL(shutdown)(socket, how);
 }
 
+#if SANITIZER_INTERCEPT_ACCEPT4
+INTERCEPTOR(int, accept4, int socket, struct sockaddr *address,
+            socklen_t *address_len, int flags) {
+  __rtsan_notify_intercepted_call("accept4");
+  return REAL(accept4)(socket, address, address_len, flags);
+}
+#endif
+
 // I/O Multiplexing
 
 INTERCEPTOR(int, poll, struct pollfd *fds, nfds_t nfds, int timeout) {
@@ -840,6 +848,9 @@ void __rtsan::InitializeInterceptors() {
   INTERCEPT_FUNCTION(sendto);
   INTERCEPT_FUNCTION(shutdown);
   INTERCEPT_FUNCTION(socket);
+#if SANITIZER_INTERCEPT_ACCEPT4
+  INTERCEPT_FUNCTION(accept4);
+#endif
 
   RTSAN_MAYBE_INTERCEPT_SELECT;
   INTERCEPT_FUNCTION(pselect);

[cjappl]

Please add a unit test for this in rtsan_test_interceptors_posix

[github-actions]

✅ With the latest revision this PR passed the C/C++ code formatter.

[cjappl]

@devnexen Thanks for the contribution. If you do any future work on rtsan please add me as a reviewer if you want eyes on it, otherwise I may miss it.

[devnexen]

roger !