Initial checkin of lldb code from internal Apple repo.

llvm-svn: 105619

1 files changed, 89 insertions, 0 deletions

diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFLocationList.cpp b/lldb/source/Plugins/SymbolFile/DWARF/DWARFLocationList.cpp
new file mode 100644
index 00000000000..6a8359d3986
--- /dev/null
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFLocationList.cpp
@@ -0,0 +1,89 @@
+//===-- DWARFLocationList.cpp -----------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "DWARFLocationList.h"
+
+#include "lldb/Core/Stream.h"
+
+#include "DWARFCompileUnit.h"
+#include "DWARFDebugInfo.h"
+#include "DWARFLocationDescription.h"
+
+using namespace lldb_private;
+
+dw_offset_t
+DWARFLocationList::Dump(Stream *s, const DWARFCompileUnit* cu, const DataExtractor& debug_loc_data, dw_offset_t offset)
+{
+    uint64_t start_addr, end_addr;
+    uint32_t addr_size = DWARFCompileUnit::GetAddressByteSize(cu);
+    s->SetAddressByteSize(DWARFCompileUnit::GetAddressByteSize(cu));
+    dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0;
+    while (debug_loc_data.ValidOffset(offset))
+    {
+        start_addr = debug_loc_data.GetMaxU64(&offset,addr_size);
+        end_addr = debug_loc_data.GetMaxU64(&offset,addr_size);
+
+        if (start_addr == 0 && end_addr == 0)
+            break;
+
+        s->PutCString("\n            ");
+        s->Indent();
+        s->AddressRange(start_addr + base_addr, end_addr + base_addr, NULL, ": ");
+        uint32_t loc_length = debug_loc_data.GetU16(&offset);
+
+        DataExtractor locationData(debug_loc_data, offset, loc_length);
+    //  if ( dump_flags & DWARFDebugInfo::eDumpFlag_Verbose ) *ostrm_ptr << " ( ";
+        print_dwarf_expression (s, locationData, addr_size, 4, false);
+        offset += loc_length;
+    }
+
+    return offset;
+}
+
+bool
+DWARFLocationList::Extract(const DataExtractor& debug_loc_data, dw_offset_t* offset_ptr, DataExtractor& location_list_data)
+{
+    // Initialize with no data just in case we don't find anything
+    location_list_data.Clear();
+
+    size_t loc_list_length = Size(debug_loc_data, *offset_ptr);
+    if (loc_list_length > 0)
+    {
+        location_list_data.SetData(debug_loc_data, *offset_ptr, loc_list_length);
+        *offset_ptr += loc_list_length;
+        return true;
+    }
+
+    return false;
+}
+
+size_t
+DWARFLocationList::Size(const DataExtractor& debug_loc_data, dw_offset_t offset)
+{
+    const dw_offset_t debug_loc_offset = offset;
+
+    while (debug_loc_data.ValidOffset(offset))
+    {
+        dw_addr_t start_addr = debug_loc_data.GetAddress(&offset);
+        dw_addr_t end_addr = debug_loc_data.GetAddress(&offset);
+
+        if (start_addr == 0 && end_addr == 0)
+            break;
+
+        uint16_t loc_length = debug_loc_data.GetU16(&offset);
+        offset += loc_length;
+    }
+
+    if (offset > debug_loc_offset)
+        return offset - debug_loc_offset;
+    return 0;
+}
+
+
+