Index: include/lldb/Host/FileSpec.h
===================================================================
--- include/lldb/Host/FileSpec.h
+++ include/lldb/Host/FileSpec.h
@@ -527,7 +527,8 @@
   ///     pointer must be checked prior to using it.
   //------------------------------------------------------------------
   lldb::DataBufferSP MemoryMapFileContents(off_t offset = 0,
-                                           size_t length = SIZE_MAX) const;
+                                           size_t length = SIZE_MAX,
+                                           bool writeable = false) const;
 
   //------------------------------------------------------------------
   /// Memory map part of, or the entire contents of, a file only if
@@ -565,7 +566,8 @@
   ///     pointer must be checked prior to using it.
   //------------------------------------------------------------------
   lldb::DataBufferSP MemoryMapFileContentsIfLocal(off_t file_offset,
-                                                  size_t file_size) const;
+                                                  size_t file_size,
+                                                  bool writeable = false) const;
 
   //------------------------------------------------------------------
   /// Read part of, or the entire contents of, a file into a heap based data
Index: source/Host/common/FileSpec.cpp
===================================================================
--- source/Host/common/FileSpec.cpp
+++ source/Host/common/FileSpec.cpp
@@ -837,12 +837,16 @@
 // verified using the DataBuffer::GetByteSize() function.
 //------------------------------------------------------------------
 DataBufferSP FileSpec::MemoryMapFileContents(off_t file_offset,
-                                             size_t file_size) const {
+                                             size_t file_size,
+                                             bool writeable) const {
   DataBufferSP data_sp;
   std::unique_ptr<DataBufferMemoryMap> mmap_data(new DataBufferMemoryMap());
   if (mmap_data.get()) {
     const size_t mapped_length =
-        mmap_data->MemoryMapFromFileSpec(this, file_offset, file_size);
+        mmap_data->MemoryMapFromFileSpec(this,
+                                         file_offset,
+                                         file_size,
+                                         writeable);
     if (((file_size == SIZE_MAX) && (mapped_length > 0)) ||
         (mapped_length >= file_size))
       data_sp.reset(mmap_data.release());
@@ -851,9 +855,10 @@
 }
 
 DataBufferSP FileSpec::MemoryMapFileContentsIfLocal(off_t file_offset,
-                                                    size_t file_size) const {
+                                                    size_t file_size,
+                                                    bool writeable) const {
   if (FileSystem::IsLocal(*this))
-    return MemoryMapFileContents(file_offset, file_size);
+    return MemoryMapFileContents(file_offset, file_size, writeable);
   else
     return ReadFileContents(file_offset, file_size, NULL);
 }
Index: source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
===================================================================
--- source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
+++ source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
@@ -386,7 +386,7 @@
                                           lldb::offset_t file_offset,
                                           lldb::offset_t length) {
   if (!data_sp) {
-    data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length);
+    data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length, true);
     data_offset = 0;
   }
 
@@ -396,7 +396,7 @@
     if (ELFHeader::MagicBytesMatch(magic)) {
       // Update the data to contain the entire file if it doesn't already
       if (data_sp->GetByteSize() < length) {
-        data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length);
+        data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length, true);
         data_offset = 0;
         magic = data_sp->GetBytes();
       }
@@ -654,7 +654,8 @@
           if (header.HasHeaderExtension() &&
             section_header_end > data_sp->GetByteSize()) {
             data_sp = file.MemoryMapFileContentsIfLocal (file_offset,
-                                                         section_header_end);
+                                                         section_header_end,
+                                                         true);
             data.SetData(data_sp);
             lldb::offset_t header_offset = data_offset;
             header.Parse(data, &header_offset);
@@ -667,7 +668,8 @@
               header.e_shoff + header.e_shnum * header.e_shentsize;
           if (section_header_end > data_sp->GetByteSize()) {
             data_sp = file.MemoryMapFileContentsIfLocal(file_offset,
-                                                        section_header_end);
+                                                        section_header_end,
+                                                        true);
             data.SetData(data_sp);
           }
 
@@ -712,7 +714,7 @@
                     header.e_phoff + header.e_phnum * header.e_phentsize;
                 if (program_headers_end > data_sp->GetByteSize()) {
                   data_sp = file.MemoryMapFileContentsIfLocal(
-                      file_offset, program_headers_end);
+                      file_offset, program_headers_end, true);
                   data.SetData(data_sp);
                 }
                 ProgramHeaderColl program_headers;
@@ -727,7 +729,8 @@
 
                 if (segment_data_end > data_sp->GetByteSize()) {
                   data_sp = file.MemoryMapFileContentsIfLocal(file_offset,
-                                                              segment_data_end);
+                                                              segment_data_end,
+                                                              true);
                   data.SetData(data_sp);
                 }
 
@@ -736,7 +739,9 @@
               } else {
                 // Need to map entire file into memory to calculate the crc.
                 data_sp =
-                    file.MemoryMapFileContentsIfLocal(file_offset, SIZE_MAX);
+                    file.MemoryMapFileContentsIfLocal(file_offset,
+                                                      SIZE_MAX,
+                                                      true);
                 data.SetData(data_sp);
                 gnu_debuglink_crc = calc_gnu_debuglink_crc32(
                     data.GetDataStart(), data.GetByteSize());