Auto merge of #2452 - devnexen:apple_thread_introspection_hook, r=Amanieu

apple introduces pthread introspection api

Author: bors

libc-test/build.rs

@@ -284,6 +284,14 @@ fn test_apple(target: &str) {
         }
     });
 
+    cfg.skip_type(move |ty| {
+        match ty {
+            // requires macOs 11.0 or higher
+            "pthread_introspection_hook_t" => true,
+            _ => false,
+        }
+    });
+
     cfg.skip_const(move |name| {
         // They're declared via `deprecated_mach` and we don't support it anymore.
         if name.starts_with("VM_FLAGS_") {
@@ -297,8 +305,12 @@ fn test_apple(target: &str) {
             "SF_SETTABLE" => true,
             // FIXME: the values have been changed since Big Sur
             "HW_TARGET" | "HW_PRODUCT" | "HW_MAXID" => true,
-            // this const requires macOS 11.0 or higher
-            "RTF_GLOBAL" => true,
+            // these consts requires macOS 11.0 or higher
+            "PTHREAD_INTROSPECTION_THREAD_CREATE"
+            | "PTHREAD_INTROSPECTION_THREAD_DESTROY"
+            | "PTHREAD_INTROSPECTION_THREAD_START"
+            | "PTHREAD_INTROSPECTION_THREAD_TERMINATE"
+            | "RTF_GLOBAL" => true,
             _ => false,
         }
     });
@@ -313,7 +325,11 @@ fn test_apple(target: &str) {
             "close" => true,
 
             // these calls require macOS 11.0 or higher
-            "preadv" | "pwritev" => true,
+            "pthread_introspection_hook_install"
+            | "pthread_introspection_getspecific_np"
+            | "pthread_introspection_setspecific_np"
+            | "preadv"
+            | "pwritev" => true,
 
             _ => false,
         }

libc-test/semver/apple.txt

@@ -942,6 +942,10 @@ PROC_PIDTASKINFO
 PROC_PIDTHREADINFO
 PTHREAD_CREATE_DETACHED
 PTHREAD_CREATE_JOINABLE
+PTHREAD_INTROSPECTION_THREAD_CREATE
+PTHREAD_INTROSPECTION_THREAD_DESTROY
+PTHREAD_INTROSPECTION_THREAD_START
+PTHREAD_INTROSPECTION_THREAD_TERMINATE
 PTHREAD_MUTEX_DEFAULT
 PTHREAD_MUTEX_ERRORCHECK
 PTHREAD_PROCESS_PRIVATE
@@ -1826,6 +1830,10 @@ pthread_attr_getschedparam
 pthread_attr_setschedparam
 pthread_create_from_mach_thread
 pthread_getschedparam
+pthread_introspection_getspecific_np
+pthread_introspection_hook_t
+pthread_introspection_hook_install
+pthread_introspection_setspecific_np
 pthread_setschedparam
 pthread_cancel
 pthread_condattr_getpshared

src/unix/bsd/apple/mod.rs

@@ -112,6 +112,9 @@ pub type thread_latency_qos_policy_t = *mut thread_latency_qos_policy;
 pub type thread_throughput_qos_policy_data_t = thread_throughput_qos_policy;
 pub type thread_throughput_qos_policy_t = *mut thread_throughput_qos_policy;
 
+pub type pthread_introspection_hook_t =
+    extern "C" fn(event: ::c_uint, thread: ::pthread_t, addr: *mut ::c_void, size: ::size_t);
+
 pub type vm_statistics_t = *mut vm_statistics;
 pub type vm_statistics_data_t = vm_statistics;
 pub type vm_statistics64_t = *mut vm_statistics64;
@@ -2959,6 +2962,11 @@ pub const AT_SYMLINK_NOFOLLOW: ::c_int = 0x0020;
 pub const AT_SYMLINK_FOLLOW: ::c_int = 0x0040;
 pub const AT_REMOVEDIR: ::c_int = 0x0080;
 
+pub const PTHREAD_INTROSPECTION_THREAD_CREATE: ::c_uint = 1;
+pub const PTHREAD_INTROSPECTION_THREAD_START: ::c_uint = 2;
+pub const PTHREAD_INTROSPECTION_THREAD_TERMINATE: ::c_uint = 3;
+pub const PTHREAD_INTROSPECTION_THREAD_DESTROY: ::c_uint = 4;
+
 pub const TIOCMODG: ::c_ulong = 0x40047403;
 pub const TIOCMODS: ::c_ulong = 0x80047404;
 pub const TIOCM_LE: ::c_int = 0x1;
@@ -4851,6 +4859,21 @@ extern "C" {
         policy: ::c_int,
         param: *const sched_param,
     ) -> ::c_int;
+
+    // Available from Big Sur
+    pub fn pthread_introspection_hook_install(
+        hook: ::pthread_introspection_hook_t,
+    ) -> ::pthread_introspection_hook_t;
+    pub fn pthread_introspection_setspecific_np(
+        thread: ::pthread_t,
+        key: ::pthread_key_t,
+        value: *const ::c_void,
+    ) -> ::c_int;
+    pub fn pthread_introspection_getspecific_np(
+        thread: ::pthread_t,
+        key: ::pthread_key_t,
+    ) -> *mut ::c_void;
+
     pub fn thread_policy_set(
         thread: thread_t,
         flavor: thread_policy_flavor_t,