Thread: Dont trim thread name on Linux

Author: spevans

CoreFoundation/Base.subproj/CFPlatform.c

@@ -1323,11 +1323,7 @@ CF_SWIFT_EXPORT int _CFThreadSetName(pthread_t thread, const char *_Nonnull name
     }
     return EINVAL;
 #elif DEPLOYMENT_TARGET_LINUX
-    // pthread_setname_np will fail if name >= 16 characters
-    char short_name[16];
-    strncpy(short_name, name, 15);
-    short_name[15] = '\0';
-    return pthread_setname_np(thread, short_name);
+    return pthread_setname_np(thread, name);
 #endif
 }
 

TestFoundation/TestThread.swift

@@ -103,8 +103,9 @@ class TestThread : XCTestCase {
 #if os(OSX) || os(iOS)
             compareThreadName(to: "12345678901234567890")
 #elseif os(Linux)
-            // pthread_setname_np() only allows 15 characters on Linux
-            compareThreadName(to: "123456789012345")
+            // pthread_setname_np() only allows 15 characters on Linux, so setting it fails
+            // and the previous name will still be there.
+            compareThreadName(to: "Thread2-2")
 #endif
             condition.lock()
             condition.signal()