Avoid going through Platform when creating a NativeProcessProtocol instance

Summary:
This commit avoids the Platform instance when spawning or attaching to a process in lldb-server.
Instead, I have the server call a (static) method of NativeProcessProtocol directly. The reason
for this is that I believe that NativeProcessProtocol should be decoupled from the Platform
(after all, it always knows which platform it is running on, unlike the rest of lldb).
Additionally, the kind of platform actions a NativeProcessProtocol instance is likely to differ
greatly from the platform actions of the lldb client, so I think the separation makes sense.

After this, the only dependency NativeProcessLinux has on PlatformLinux is the ResolveExecutable
method, which needs additional refactoring.

This is a resubmit of r241672, after it was reverted due to build failueres on non-linux
platforms.

Reviewers: ovyalov, clayborg

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D10996

llvm-svn: 241796

1 files changed, 12 insertions, 5 deletions

diff --git a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
index 41d6b7674a0..ae25fb4b4f1 100644
--- a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
@@ -824,15 +824,22 @@ NativeProcessLinux::LaunchArgs::~LaunchArgs()
 // -----------------------------------------------------------------------------
 
 Error
-NativeProcessLinux::LaunchProcess (
-    Module *exe_module,
+NativeProcessProtocol::Launch (
     ProcessLaunchInfo &launch_info,
     NativeProcessProtocol::NativeDelegate &native_delegate,
     NativeProcessProtocolSP &native_process_sp)
 {
     Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS));
 
-    Error error;
+    lldb::ModuleSP exe_module_sp;
+    PlatformSP platform_sp (Platform::GetHostPlatform ());
+    Error error = platform_sp->ResolveExecutable(
+            ModuleSpec(launch_info.GetExecutableFile(), launch_info.GetArchitecture()),
+            exe_module_sp,
+            nullptr);
+
+    if (! error.Success())
+        return error;
 
     // Verify the working directory is valid if one was specified.
     FileSpec working_dir{launch_info.GetWorkingDirectory()};
@@ -906,7 +913,7 @@ NativeProcessLinux::LaunchProcess (
     }
 
     std::static_pointer_cast<NativeProcessLinux> (native_process_sp)->LaunchInferior (
-            exe_module,
+            exe_module_sp.get(),
             launch_info.GetArguments ().GetConstArgumentVector (),
             launch_info.GetEnvironmentEntries ().GetConstArgumentVector (),
             stdin_file_spec,
@@ -930,7 +937,7 @@ NativeProcessLinux::LaunchProcess (
 }
 
 Error
-NativeProcessLinux::AttachToProcess (
+NativeProcessProtocol::Attach (
     lldb::pid_t pid,
     NativeProcessProtocol::NativeDelegate &native_delegate,
     NativeProcessProtocolSP &native_process_sp)