Add pthread_gettid_np for Android and glibc

libc-test/build.rs

@@ -5090,6 +5090,8 @@ fn test_linux(target: &str) {
             "posix_spawn_file_actions_addclosefrom_np" if gnu && sparc64 => true,
             // Needs glibc 2.35 or later.
             "posix_spawn_file_actions_addtcsetpgrp_np" if gnu && sparc64 => true,
+            // Needs glibc 2.42 or later.
+            "pthread_gettid_np" if gnu && versions.glibc.unwrap() < (2, 42) => true,
 
             // FIXME(linux): Deprecated since glibc 2.30. Remove fn once upstream does.
             "sysctl" if gnu => true,

libc-test/semver/android.txt

@@ -3829,6 +3829,7 @@ pthread_getattr_np
 pthread_getcpuclockid
 pthread_getschedparam
 pthread_getspecific
+pthread_gettid_np
 pthread_join
 pthread_key_create
 pthread_key_delete

libc-test/semver/linux-gnu.txt

@@ -659,6 +659,7 @@ process_vm_readv
 process_vm_writev
 pthread_attr_getaffinity_np
 pthread_attr_setaffinity_np
+pthread_gettid_np
 pthread_rwlockattr_getkind_np
 pthread_rwlockattr_getpshared
 pthread_rwlockattr_setkind_np

src/new/bionic_libc/pthread.rs

@@ -2,6 +2,7 @@
 
 pub use crate::new::common::linux_like::pthread::{
     pthread_getattr_np,
+    pthread_gettid_np,
     pthread_setname_np,
 };
 pub use crate::new::common::posix::pthread::{

src/new/common/linux_like/pthread.rs

@@ -13,6 +13,9 @@ extern "C" {
     #[cfg(target_os = "linux")]
     pub fn pthread_getname_np(thread: crate::pthread_t, name: *mut c_char, len: size_t) -> c_int;
 
+    #[cfg(any(target_os = "android", all(target_os = "linux", target_env = "gnu")))]
+    pub fn pthread_gettid_np(thread: crate::pthread_t) -> crate::pid_t;
+
     #[cfg(any(target_os = "linux", target_os = "l4re"))]
     pub fn pthread_setaffinity_np(
         thread: crate::pthread_t,

src/new/glibc/sysdeps/nptl/pthread.rs

@@ -28,6 +28,7 @@ pub use crate::new::common::linux_like::pthread::{
     pthread_getaffinity_np,
     pthread_getattr_np,
     pthread_getname_np,
+    pthread_gettid_np,
     pthread_setaffinity_np,
     pthread_setname_np,
 };