[compiler-rt][rtsan] Fix llvm#123484 for glibc < 2.21

devnexen · devnexen · commit e5b02db00874 · 2025-01-20T20:00:30.000Z
linux/glibc prior to 2.21 had a different signature for recvmmsg.
diff --git 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);
 }

Original file line number	Diff line number	Diff line change
`@@ -927,8 +927,13 @@ INTERCEPTOR(ssize_t, recvmsg, int socket, struct msghdr *message, int flags) {`
`927`	`927`	`}`
`928`	`928`
`929`	`929`	`#if SANITIZER_INTERCEPT_RECVMMSG`
	`930`	`+#if defined(__GLIBC_MINOR__) && __GLIBC_MINOR__ < 21`
	`931`	`+INTERCEPTOR(int, recvmmsg, int socket, struct mmsghdr *message,`
	`932`	`+ unsigned int len, int flags, const struct timespec *timeout) {`
	`933`	`+#else`
`930`	`934`	`INTERCEPTOR(int, recvmmsg, int socket, struct mmsghdr *message,`
`931`	`935`	`unsigned int len, int flags, struct timespec *timeout) {`
	`936`	`+#endif`
`932`	`937`	`__rtsan_notify_intercepted_call("recvmmsg");`
`933`	`938`	`return REAL(recvmmsg)(socket, message, len, flags, timeout);`
`934`	`939`	`}`