[llvm-branch-commits] [lldb] r270133 - Properly unload modules from target image list when using svr4 packets

[Francis Ricci via llvm-branch-commits]

Author: fjricci
Date: Thu May 19 16:04:16 2016
New Revision: 270133

URL: http://llvm.org/viewvc/llvm-project?rev=270133&view=rev
Log:
Properly unload modules from target image list when using svr4 packets

Summary:
When we receive an svr4 packet from the remote, we check for new modules
and add them to the list of images in the target. However, we did not
do the same for modules which have been removed.

This was causing TestLoadUnload to fail when using ds2, which uses
svr4 packets to communicate all library info on Linux. This patch fixes
the failing test.

Reviewers: zturner, tfiala, ADodds

Subscribers: lldb-commits, sas

Differential Revision: http://reviews.llvm.org/D19230

This is a cherry-pick of 267467

Modified:
    lldb/branches/release_38/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp

Modified: lldb/branches/release_38/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/branches/release_38/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp?rev=270133&r1=270132&r2=270133&view=diff
==============================================================================
--- lldb/branches/release_38/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp (original)
+++ lldb/branches/release_38/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp Thu May 19 16:04:16 2016
@@ -4851,7 +4851,31 @@ ProcessGDBRemote::LoadModules (LoadedMod
 
     if (new_modules.GetSize() > 0)
     {
+        ModuleList removed_modules;
         Target &target = GetTarget();
+        ModuleList &loaded_modules = m_process->GetTarget().GetImages();
+
+        for (size_t i = 0; i < loaded_modules.GetSize(); ++i)
+        {
+            const lldb::ModuleSP loaded_module = loaded_modules.GetModuleAtIndex(i);
+
+            bool found = false;
+            for (size_t j = 0; j < new_modules.GetSize(); ++j)
+            {
+                if (new_modules.GetModuleAtIndex(j).get() == loaded_module.get())
+                    found = true;
+            }
+
+            if (!found)
+            {
+                lldb_private::ObjectFile * obj = loaded_module->GetObjectFile ();
+                if (obj && obj->GetType () != ObjectFile::Type::eTypeExecutable)
+                    removed_modules.Append (loaded_module);
+            }
+        }
+
+        loaded_modules.Remove (removed_modules);
+        m_process->GetTarget().ModulesDidUnload (removed_modules, false);
 
         new_modules.ForEach ([&target](const lldb::ModuleSP module_sp) -> bool
         {
@@ -4867,13 +4891,11 @@ ProcessGDBRemote::LoadModules (LoadedMod
             return false;
         });
 
-        ModuleList &loaded_modules = m_process->GetTarget().GetImages();
         loaded_modules.AppendIfNeeded (new_modules);
         m_process->GetTarget().ModulesDidLoad (new_modules);
     }
 
     return new_modules.GetSize();
-
 }
 
 size_t