llgs: fix thread names broken by recent native thread changes.

* Fixes the local stack variable return pointer usage in NativeThreadLinux::GetName().
* Changes NativeThreadProtocol::GetName() to return a std::string.
* Adds a unit test to verify thread names don't regress in the future.  Currently only run on Linux since I know default thread names there.

llvm-svn: 217717

1 files changed, 1 insertions, 1 deletions

diff --git a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
index 4158e3d1e14..f362477d923 100644
--- a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
@@ -61,7 +61,7 @@ NativeThreadLinux::NativeThreadLinux (NativeProcessLinux *process, lldb::tid_t t
 {
 }
 
-const char *
+std::string
 NativeThreadLinux::GetName()
 {
     NativeProcessProtocolSP process_sp = m_process_wp.lock ();