From ebcb36d4a1387e771fb49d1f6379cb5774373a5a Mon Sep 17 00:00:00 2001
From: Jonas Devlieghere <jonas@devlieghere.com>
Date: Mon, 23 Dec 2019 18:03:35 -0800
Subject: [PATCH] Revert "[lldb] Don't process symlinks deep inside DWARFUnit"

This temporarily reverts commit 3cfb6677b2aa20f782d9bb0f7958e61f5a976c16
because it breaks TestCompDirSymLink.py on macOS.
---
 lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp  | 21 ++++++++++++++++++++-
 .../Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp    | 11 -----------
 2 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp b/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
index b71595b..d8d70ba 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
@@ -716,6 +716,25 @@ removeHostnameFromPathname(llvm::StringRef path_from_dwarf) {
   return path;
 }
 
+static FileSpec resolveCompDir(const FileSpec &path) {
+  bool is_symlink = SymbolFileDWARF::GetSymlinkPaths().FindFileIndex(
+                        0, path, /*full*/ true) != UINT32_MAX;
+
+  if (!is_symlink)
+    return path;
+
+  namespace fs = llvm::sys::fs;
+  if (fs::get_file_type(path.GetPath(), false) != fs::file_type::symlink_file)
+    return path;
+
+  FileSpec resolved_symlink;
+  const auto error = FileSystem::Instance().Readlink(path, resolved_symlink);
+  if (error.Success())
+    return resolved_symlink;
+
+  return path;
+}
+
 void DWARFUnit::ComputeCompDirAndGuessPathStyle() {
   m_comp_dir = FileSpec();
   const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly();
@@ -727,7 +746,7 @@ void DWARFUnit::ComputeCompDirAndGuessPathStyle() {
   if (!comp_dir.empty()) {
     FileSpec::Style comp_dir_style =
         FileSpec::GuessPathStyle(comp_dir).getValueOr(FileSpec::Style::native);
-    m_comp_dir = FileSpec(comp_dir, comp_dir_style);
+    m_comp_dir = resolveCompDir(FileSpec(comp_dir, comp_dir_style));
   } else {
     // Try to detect the style based on the DW_AT_name attribute, but just store
     // the detected style in the m_comp_dir field.
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
index 96073f3..53339ea 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -453,17 +453,6 @@ SymbolFileDWARF::GetTypeSystemForLanguage(LanguageType language) {
 void SymbolFileDWARF::InitializeObject() {
   Log *log = LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO);
 
-  Module &module = *GetObjectFile()->GetModule();
-
-  for (const FileSpec &symlink : GetSymlinkPaths()) {
-    FileSpec resolved;
-    Status status = FileSystem::Instance().Readlink(symlink, resolved);
-    if (status.Success())
-      module.GetSourceMappingList().Append(ConstString(symlink.GetPath()),
-                                           ConstString(resolved.GetPath()),
-                                           /*notify=*/true);
-  }
-
   if (!GetGlobalPluginProperties()->IgnoreFileIndexes()) {
     DWARFDataExtractor apple_names, apple_namespaces, apple_types, apple_objc;
     LoadSectionData(eSectionTypeDWARFAppleNames, apple_names);
-- 
2.7.4