Use the actual formula

5 years ago · 420d5413c7
parent 464f558a45
commit 420d5413c7
1 changed files with 3 additions and 3 deletions
--- a/src/core/lib/iomgr/tcp_posix.cc
+++ b/src/core/lib/iomgr/tcp_posix.cc
@ -435,9 +435,9 @@ static void tcp_do_read(grpc_tcp* tcp) {
  GPR_TIMER_SCOPE("tcp_do_read", 0);
  struct msghdr msg;
  struct iovec iov[MAX_READ_IOVEC];
-  char cmsgbuf
-      [128 /*CMSG_SPACE(sizeof(grpc_core::scm_timestamping)) + CMSG_SPACE(sizeof(int))*/
-  ];
+  constexpr size_t cmsg_alloc_space =
+      CMSG_SPACE(sizeof(grpc_core::scm_timestamping)) + CMSG_SPACE(sizeof(int));
+  char cmsgbuf[cmsg_alloc_space];
  ssize_t read_bytes;
  size_t total_read_bytes = 0;