[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, 26 insertions, 0 deletions

diff --git a/lldb/source/Breakpoint/BreakpointPrecondition.cpp b/lldb/source/Breakpoint/BreakpointPrecondition.cpp
new file mode 100644
index 00000000000..a387c75c835
--- /dev/null
+++ b/lldb/source/Breakpoint/BreakpointPrecondition.cpp
@@ -0,0 +1,26 @@
+//===-- BreakpointPrecondition.cpp ------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Breakpoint/BreakpointPrecondition.h"
+#include "lldb/Utility/Status.h"
+
+using namespace lldb_private;
+
+bool BreakpointPrecondition::EvaluatePrecondition(
+    StoppointCallbackContext &context) {
+  return false;
+}
+
+void BreakpointPrecondition::GetDescription(Stream &stream,
+                                            lldb::DescriptionLevel level) {}
+
+Status BreakpointPrecondition::ConfigurePrecondition(Args &args) {
+  Status error;
+  error.SetErrorString("Base breakpoint precondition has no options.");
+  return error;
+}