[Target] Decouple ObjCLanguageRuntime from LanguageRuntime

Summary:
ObjCLanguageRuntime was being pulled into LanguageRuntime because of
Breakpoint Preconditions. If we move BreakpointPrecondition out of Breakpoint,
we can extend the LanguageRuntime plugin interface so that LanguageRuntimes
can give us a BreakpointPrecondition for exceptions.

Differential Revision: https://reviews.llvm.org/D63181

llvm-svn: 364098

1 files changed, 13 insertions, 1 deletions

diff --git a/lldb/source/Core/PluginManager.cpp b/lldb/source/Core/PluginManager.cpp
index cf940dd7034..24cadcd85bf 100644
--- a/lldb/source/Core/PluginManager.cpp
+++ b/lldb/source/Core/PluginManager.cpp
@@ -828,6 +828,7 @@ struct LanguageRuntimeInstance {
   std::string description;
   LanguageRuntimeCreateInstance create_callback;
   LanguageRuntimeGetCommandObject command_callback;
+  LanguageRuntimeGetExceptionPrecondition precondition_callback;
 };
 
 typedef std::vector<LanguageRuntimeInstance> LanguageRuntimeInstances;
@@ -845,7 +846,8 @@ static LanguageRuntimeInstances &GetLanguageRuntimeInstances() {
 bool PluginManager::RegisterPlugin(
     ConstString name, const char *description,
     LanguageRuntimeCreateInstance create_callback,
-    LanguageRuntimeGetCommandObject command_callback) {
+    LanguageRuntimeGetCommandObject command_callback,
+    LanguageRuntimeGetExceptionPrecondition precondition_callback) {
   if (create_callback) {
     LanguageRuntimeInstance instance;
     assert((bool)name);
@@ -854,6 +856,7 @@ bool PluginManager::RegisterPlugin(
       instance.description = description;
     instance.create_callback = create_callback;
     instance.command_callback = command_callback;
+    instance.precondition_callback = precondition_callback;
     std::lock_guard<std::recursive_mutex> guard(GetLanguageRuntimeMutex());
     GetLanguageRuntimeInstances().push_back(instance);
   }
@@ -895,6 +898,15 @@ PluginManager::GetLanguageRuntimeGetCommandObjectAtIndex(uint32_t idx) {
   return nullptr;
 }
 
+LanguageRuntimeGetExceptionPrecondition
+PluginManager::GetLanguageRuntimeGetExceptionPreconditionAtIndex(uint32_t idx) {
+  std::lock_guard<std::recursive_mutex> guard(GetLanguageRuntimeMutex());
+  LanguageRuntimeInstances &instances = GetLanguageRuntimeInstances();
+  if (idx < instances.size())
+    return instances[idx].precondition_callback;
+  return nullptr;
+}
+
 LanguageRuntimeCreateInstance
 PluginManager::GetLanguageRuntimeCreateCallbackForPluginName(
     ConstString name) {