[Reproducers] Copy over access/modification time in the FileCollector.

Copy over access and modification time for the files included in the
reproducer. This is needed to pass tests that check the integrity of
object files based on their time stamp.

llvm-svn: 364457

diff --git a/lldb/source/Utility/FileCollector.cpp b/lldb/source/Utility/FileCollector.cpp
index aafa34b6d8dab1b012401c996c17850d3bb968fa..ed93591922056d454e09942fb27daa9f50f7bede 100644 (file)
--- a/lldb/source/Utility/FileCollector.cpp
+++ b/lldb/source/Utility/FileCollector.cpp
@@ -11,6 +11,7 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Path.h"
+#include "llvm/Support/Process.h"
 
 using namespace lldb_private;
 using namespace llvm;
@@ -104,6 +105,27 @@ void FileCollector::AddFileImpl(StringRef src_path) {
   AddFileToMapping(virtual_path, dst_path);
 }
 
+/// Set the access and modification time for the given file from the given
+/// status object.
+static std::error_code
+CopyAccessAndModificationTime(StringRef filename,
+                              const sys::fs::file_status &stat) {
+  int fd;
+
+  if (auto ec =
+          sys::fs::openFileForWrite(filename, fd, sys::fs::CD_OpenExisting))
+    return ec;
+
+  if (auto ec = sys::fs::setLastAccessAndModificationTime(
+          fd, stat.getLastAccessedTime(), stat.getLastModificationTime()))
+    return ec;
+
+  if (auto ec = sys::Process::SafelyCloseFileDescriptor(fd))
+    return ec;
+
+  return {};
+}
+
 std::error_code FileCollector::CopyFiles(bool stop_on_error) {
   for (auto &entry : m_vfs_writer.getMappings()) {
     // Create directory tree.
@@ -127,6 +149,15 @@ std::error_code FileCollector::CopyFiles(bool stop_on_error) {
           return ec;
       }
     }
+
+    // Copy over modification time.
+    sys::fs::file_status stat;
+    if (std::error_code ec = sys::fs::status(entry.VPath, stat)) {
+      if (stop_on_error)
+        return ec;
+      continue;
+    }
+    CopyAccessAndModificationTime(entry.RPath, stat);
   }
   return {};
 }