[compiler-rt] [compiler-rt][rtsan] getsockopt/setsockopt interception. (PR #124004)

[David CARLIER via llvm-commits]

https://github.com/devnexen created https://github.com/llvm/llvm-project/pull/124004

None

>From 2ba05fce7fab24d89de8c07edd7d018a12bb789a Mon Sep 17 00:00:00 2001
From: David Carlier <devnexen at gmail.com>
Date: Wed, 22 Jan 2025 21:06:19 +0000
Subject: [PATCH] [compiler-rt][rtsan] getsockopt/setsockopt interception.

---
 .../lib/rtsan/rtsan_interceptors_posix.cpp    | 21 ++++++++++++++++++
 .../tests/rtsan_test_interceptors_posix.cpp   | 22 +++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp b/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
index 71938d3edba38d..f65696ef4ebaf0 100644
--- a/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
+++ b/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
@@ -995,6 +995,25 @@ INTERCEPTOR(int, accept4, int socket, struct sockaddr *address,
 #define RTSAN_MAYBE_INTERCEPT_ACCEPT4
 #endif
 
+#if SANITIZER_INTERCEPT_GETSOCKOPT
+INTERCEPTOR(int, getsockopt, int socket, int level, int option, void *value,
+            socklen_t *len) {
+  __rtsan_notify_intercepted_call("getsockopt");
+  return REAL(getsockopt)(socket, level, option, value, len);
+}
+
+INTERCEPTOR(int, setsockopt, int socket, int level, int option,
+            const void *value, socklen_t len) {
+  __rtsan_notify_intercepted_call("setsockopt");
+  return REAL(setsockopt)(socket, level, option, value, len);
+}
+#define RTSAN_MAYBE_INTERCEPT_GETSOCKOPT INTERCEPT_FUNCTION(getsockopt)
+#define RTSAN_MAYBE_INTERCEPT_SETSOCKOPT INTERCEPT_FUNCTION(setsockopt)
+#else
+#define RTSAN_MAYBE_INTERCEPT_GETSOCKOPT
+#define RTSAN_MAYBE_INTERCEPT_SETSOCKOPT
+#endif
+
 // I/O Multiplexing
 
 INTERCEPTOR(int, poll, struct pollfd *fds, nfds_t nfds, int timeout) {
@@ -1325,6 +1344,8 @@ void __rtsan::InitializeInterceptors() {
   RTSAN_MAYBE_INTERCEPT_ACCEPT4;
   RTSAN_MAYBE_INTERCEPT_GETSOCKNAME;
   RTSAN_MAYBE_INTERCEPT_GETPEERNAME;
+  RTSAN_MAYBE_INTERCEPT_GETSOCKOPT;
+  RTSAN_MAYBE_INTERCEPT_SETSOCKOPT;
 
   RTSAN_MAYBE_INTERCEPT_SELECT;
   INTERCEPT_FUNCTION(pselect);
diff --git a/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp b/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp
index 0a59ae0ea92548..07a2c8897e758c 100644
--- a/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp
+++ b/compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp
@@ -1282,6 +1282,28 @@ TEST(TestRtsanInterceptors, GetpeernameOnASocketDiesWhenRealtime) {
 }
 #endif
 
+#if SANITIZER_INTERCEPT_GETSOCKOPT
+TEST(TestRtsanInterceptors, GetsockoptOnASocketDiesWhenRealtime) {
+  int val = 0;
+  socklen_t len = static_cast<socklen_t>(sizeof(val));
+  auto Func = [&val, &len]() {
+    getsockopt(0, SOL_SOCKET, SO_REUSEADDR, &val, &len);
+  };
+  ExpectRealtimeDeath(Func, "getsockopt");
+  ExpectNonRealtimeSurvival(Func);
+}
+
+TEST(TestRtsanInterceptors, SetsockoptOnASocketDiesWhenRealtime) {
+  int val = 0;
+  socklen_t len = static_cast<socklen_t>(sizeof(val));
+  auto Func = [&val, &len]() {
+    setsockopt(0, SOL_SOCKET, SO_REUSEADDR, &val, len);
+  };
+  ExpectRealtimeDeath(Func, "setsockopt");
+  ExpectNonRealtimeSurvival(Func);
+}
+#endif
+
 /*
     I/O Multiplexing
 */