Auto merge of rust-lang#3039 - devnexen:membarrier_flags_linux, r=JohnTitor

membarrier flags constants addition

Author: bors

libc-test/build.rs

@@ -1632,6 +1632,7 @@ fn test_android(target: &str) {
                 "linux/rtnetlink.h",
                 "linux/if_tun.h",
                 "linux/magic.h",
+                "linux/membarrier.h",
                 "linux/memfd.h",
                 "linux/mempolicy.h",
                 "linux/module.h",
@@ -1783,6 +1784,9 @@ fn test_android(target: &str) {
             // GRND_INSECURE was added in platform-tools-30.0.0
             "GRND_INSECURE" => true,
 
+            // kernel 5.10 minimum required
+            "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ" | "MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ" => true,
+
             _ => false,
         }
     });
@@ -3249,6 +3253,7 @@ fn test_linux(target: &str) {
         "linux/keyctl.h",
         "linux/magic.h",
         "linux/memfd.h",
+        "linux/membarrier.h",
         "linux/mempolicy.h",
         "linux/mman.h",
         "linux/module.h",
@@ -3484,6 +3489,12 @@ fn test_linux(target: &str) {
             {
                 return true;
             }
+            // FIXME: Requires >= 5.10 kernel headers
+            if name.starts_with("MEMBARRIER_CMD_REGISTER")
+                || name.starts_with("MEMBARRIER_CMD_PRIVATE")
+            {
+                return true;
+            }
         }
         match name {
             // These constants are not available if gnu headers have been included

libc-test/semver/android.txt

@@ -1164,6 +1164,16 @@ MCAST_MSFILTER
 MCAST_UNBLOCK_SOURCE
 MCL_CURRENT
 MCL_FUTURE
+MEMBARRIER_CMD_GLOBAL
+MEMBARRIER_CMD_GLOBAL_EXPEDITED
+MEMBARRIER_CMD_QUERY
+MEMBARRIER_CMD_PRIVATE_EXPEDITED
+MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE
+MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ
+MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED
+MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED
+MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE
+MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ
 MFD_ALLOW_SEALING
 MFD_CLOEXEC
 MFD_HUGETLB

libc-test/semver/linux.txt

@@ -1300,6 +1300,16 @@ MCAST_MSFILTER
 MCAST_UNBLOCK_SOURCE
 MCL_CURRENT
 MCL_FUTURE
+MEMBARRIER_CMD_GLOBAL
+MEMBARRIER_CMD_GLOBAL_EXPEDITED
+MEMBARRIER_CMD_QUERY
+MEMBARRIER_CMD_PRIVATE_EXPEDITED
+MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE
+MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ
+MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED
+MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED
+MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE
+MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ
 MFD_ALLOW_SEALING
 MFD_CLOEXEC
 MFD_HUGETLB

src/unix/linux_like/android/mod.rs

@@ -2732,6 +2732,18 @@ pub const SCHED_RESET_ON_FORK: ::c_int = 0x40000000;
 
 pub const CLONE_PIDFD: ::c_int = 0x1000;
 
+// linux/membarrier.h
+pub const MEMBARRIER_CMD_QUERY: ::c_int = 0;
+pub const MEMBARRIER_CMD_GLOBAL: ::c_int = 1 << 0;
+pub const MEMBARRIER_CMD_GLOBAL_EXPEDITED: ::c_int = 1 << 1;
+pub const MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED: ::c_int = 1 << 2;
+pub const MEMBARRIER_CMD_PRIVATE_EXPEDITED: ::c_int = 1 << 3;
+pub const MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED: ::c_int = 1 << 4;
+pub const MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE: ::c_int = 1 << 5;
+pub const MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE: ::c_int = 1 << 6;
+pub const MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ: ::c_int = 1 << 7;
+pub const MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ: ::c_int = 1 << 8;
+
 // linux/mempolicy.h
 pub const MPOL_DEFAULT: ::c_int = 0;
 pub const MPOL_PREFERRED: ::c_int = 1;

src/unix/linux_like/linux/mod.rs

@@ -1849,6 +1849,18 @@ pub const MPOL_F_NUMA_BALANCING: ::c_int = 1 << 13;
 pub const MPOL_F_RELATIVE_NODES: ::c_int = 1 << 14;
 pub const MPOL_F_STATIC_NODES: ::c_int = 1 << 15;
 
+// linux/membarrier.h
+pub const MEMBARRIER_CMD_QUERY: ::c_int = 0;
+pub const MEMBARRIER_CMD_GLOBAL: ::c_int = 1 << 0;
+pub const MEMBARRIER_CMD_GLOBAL_EXPEDITED: ::c_int = 1 << 1;
+pub const MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED: ::c_int = 1 << 2;
+pub const MEMBARRIER_CMD_PRIVATE_EXPEDITED: ::c_int = 1 << 3;
+pub const MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED: ::c_int = 1 << 4;
+pub const MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE: ::c_int = 1 << 5;
+pub const MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE: ::c_int = 1 << 6;
+pub const MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ: ::c_int = 1 << 7;
+pub const MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ: ::c_int = 1 << 8;
+
 align_const! {
     pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {
         size: [0; __SIZEOF_PTHREAD_MUTEX_T],