[PATCH] D43128: Introduce an API for LLDB to compute the default module cache path

[Adrian Prantl via Phabricator via cfe-commits]

aprantl created this revision.
aprantl added reviewers: bruno, jingham.

LLDB creates Clang modules and had an incomplete copy of the clang Driver code that compute the -fmodule-cache-path. This patch makes the clang driver code accessible to LLDB.


https://reviews.llvm.org/D43128

Files:
  include/clang/Driver/Driver.h
  lib/Driver/ToolChains/Clang.cpp


Index: lib/Driver/ToolChains/Clang.cpp
===================================================================
--- lib/Driver/ToolChains/Clang.cpp
+++ lib/Driver/ToolChains/Clang.cpp
@@ -2500,6 +2500,13 @@
     CmdArgs.push_back("-fno-math-builtin");
 }
 
+void Driver::getDefaultModuleCachePath(SmallVectorImpl<char> &Result) {
+  llvm::sys::path::system_temp_directory(/*erasedOnReboot=*/false, Result);
+  llvm::sys::path::append(Result, "org.llvm.clang.");
+  appendUserToPath(Result);
+  llvm::sys::path::append(Result, "ModuleCache");
+}
+
 static void RenderModulesOptions(Compilation &C, const Driver &D,
                                  const ArgList &Args, const InputInfo &Input,
                                  const InputInfo &Output,
@@ -2560,10 +2567,7 @@
       llvm::sys::path::append(Path, "modules");
     } else if (Path.empty()) {
       // No module path was provided: use the default.
-      llvm::sys::path::system_temp_directory(/*erasedOnReboot=*/false, Path);
-      llvm::sys::path::append(Path, "org.llvm.clang.");
-      appendUserToPath(Path);
-      llvm::sys::path::append(Path, "ModuleCache");
+      Driver::getDefaultModuleCachePath(Path);
     }
 
     const char Arg[] = "-fmodules-cache-path=";
Index: include/clang/Driver/Driver.h
===================================================================
--- include/clang/Driver/Driver.h
+++ include/clang/Driver/Driver.h
@@ -572,6 +572,8 @@
   /// no extra characters remaining at the end.
   static bool GetReleaseVersion(StringRef Str,
                                 MutableArrayRef<unsigned> Digits);
+  /// Compute the default -fmodule-cache-path.
+  static void getDefaultModuleCachePath(SmallVectorImpl<char> &Result);
 };
 
 /// \return True if the last defined optimization level is -Ofast.


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