Add thread_get_name RPC to get the name of a thread.

Message-ID: <6qm4fdtthi5nrmmleum7z2xemxz77adohed454eaeuzlmvfx4d@l3pyff4tqwry>

2 files changed, 29 insertions, 0 deletions

diff --git a/include/mach/gnumach.defs b/include/mach/gnumach.defs
index 7ecf74d3..f13e866b 100644
--- a/include/mach/gnumach.defs
+++ b/include/mach/gnumach.defs
@@ -215,3 +215,11 @@ routine vm_pages_phys(
 simpleroutine thread_set_name(
 		thread	: thread_t;
 		name	: kernel_debug_name_t);
+
+/*
+ *  Get the name of thread THREAD as set by thread_set_name. Will return
+ *  the name of the task if no THREAD name is set.
+ */
+routine thread_get_name(
+        thread : thread_t;
+        out name : kernel_debug_name_t);
diff --git a/kern/thread.c b/kern/thread.c
index 68cc667e..a656c076 100644
--- a/kern/thread.c
+++ b/kern/thread.c
@@ -2647,3 +2647,24 @@ thread_set_name(
 	thread->name[sizeof thread->name - 1] = '\0';
 	return KERN_SUCCESS;
 }
+
+/*
+ *  thread_get_name
+ *
+ *  Return the name of the thread THREAD.
+ *  Will use the name of the thread as set by thread_set_name.
+ *  If thread_set_name was not used, this will return the name of the task
+ *  copied when the thread was created.
+ */
+kern_return_t
+thread_get_name(
+		thread_t	thread,
+		kernel_debug_name_t	name)
+{
+	if (thread == THREAD_NULL)
+		return KERN_INVALID_ARGUMENT;
+
+	strncpy(name, thread->name, sizeof thread->name);
+
+	return KERN_SUCCESS;
+}