Add functionality to the platforms to figure out the proper name for a dynamic library on the system given a basename

This will do things like,
given mylibrary,
return

libmylibrary.dylib on OSX
mylibrary.dll on Windows

and so on for other platforms
It is currently implemented for Windows, Darwin, and Linux. Other platforms should fill in accordingly

llvm-svn: 246131

lldb/include/lldb/Target/Platform.h

@@ -268,6 +268,9 @@ class ModuleCache;
 
         virtual const char *
         GetHostname ();
+        
+        virtual ConstString
+        GetFullNameForDylib (ConstString basename);
 
         virtual const char *
         GetDescription () = 0;

lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp

@@ -854,3 +854,14 @@ PlatformLinux::ConvertMmapFlagsToPlatform(const ArchSpec &arch, unsigned flags)
         flags_platform |= map_anon;
     return flags_platform;
 }
+
+ConstString
+PlatformLinux::GetFullNameForDylib (ConstString basename)
+{
+    if (basename.IsEmpty())
+        return basename;
+    
+    StreamString stream;
+    stream.Printf("lib%s.so", basename.GetCString());
+    return ConstString(stream.GetData());
+}

lldb/source/Plugins/Platform/Linux/PlatformLinux.h

@@ -111,6 +111,9 @@ namespace platform_linux {
         uint64_t
         ConvertMmapFlagsToPlatform(const ArchSpec &arch, unsigned flags) override;
 
+        ConstString
+        GetFullNameForDylib (ConstString basename) override;
+        
     private:
         DISALLOW_COPY_AND_ASSIGN (PlatformLinux);
     };

lldb/source/Plugins/Platform/MacOSX/PlatformDarwin.cpp

@@ -1531,3 +1531,15 @@ PlatformDarwin::AddClangModuleCompilationOptionsForSDKType (Target *target, std:
         options.push_back(sysroot_spec.GetPath());
     }
 }
+
+ConstString
+PlatformDarwin::GetFullNameForDylib (ConstString basename)
+{
+    if (basename.IsEmpty())
+        return basename;
+    
+    StreamString stream;
+    stream.Printf("lib%s.dylib", basename.GetCString());
+    return ConstString(stream.GetData());
+}
+

lldb/source/Plugins/Platform/MacOSX/PlatformDarwin.h

@@ -84,6 +84,9 @@ public:
     
     bool
     SupportsModules () override { return true; }
+    
+    lldb_private::ConstString
+    GetFullNameForDylib (lldb_private::ConstString basename) override;
 
 protected:
 

lldb/source/Plugins/Platform/Windows/PlatformWindows.cpp

@@ -743,3 +743,14 @@ PlatformWindows::GetEnvironment(StringList &env)
 
     return Host::GetEnvironment(env);
 }
+
+ConstString
+PlatformWindows::GetFullNameForDylib (ConstString basename)
+{
+    if (basename.IsEmpty())
+        return basename;
+    
+    StreamString stream;
+    stream.Printf("%s.dll", basename.GetCString());
+    return ConstString(stream.GetData());
+}

lldb/source/Plugins/Platform/Windows/PlatformWindows.h

@@ -156,6 +156,9 @@ public:
     CalculateTrapHandlerSymbolNames () override
     {
     }
+    
+    ConstString
+    GetFullNameForDylib (ConstString basename) override;
 
 protected:
     lldb::PlatformSP m_remote_platform_sp;

lldb/source/Target/Platform.cpp

@@ -947,6 +947,12 @@ Platform::GetHostname ()
     return m_name.c_str();
 }
 
+ConstString
+Platform::GetFullNameForDylib (ConstString basename)
+{
+    return basename;
+}
+
 bool
 Platform::SetRemoteWorkingDirectory(const FileSpec &working_dir)
 {