Test suite runs better again after recent fixes that would select a platform if a "file a.out" auto selected a different platform than the selected one.

Changes include:
- fix it so you can select the "host" platform using "platform select host"
- change all callbacks that create platforms to returns shared pointers
- fix TestImageListMultiArchitecture.py to restore the "host" platform by running "platform select host"
- Add a new "PlatformSP Platform::Find(const ConstString &name)" method to get a cached platform
- cache platforms that are created and re-use them instead of always creating a new one

llvm-svn: 218145

1 files changed, 2 insertions, 1 deletions

diff --git a/lldb/source/API/SBPlatform.cpp b/lldb/source/API/SBPlatform.cpp
index 9914852cead..d3e769ae675 100644
--- a/lldb/source/API/SBPlatform.cpp
+++ b/lldb/source/API/SBPlatform.cpp
@@ -269,7 +269,8 @@ SBPlatform::SBPlatform (const char *platform_name) :
     m_opaque_sp ()
 {
     Error error;
-    m_opaque_sp = Platform::Create (platform_name, error);
+    if (platform_name && platform_name[0])
+        m_opaque_sp = Platform::Create (ConstString(platform_name), error);
 }
 
 SBPlatform::~SBPlatform()