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//===-- 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 DWARFDataExtractor& debug_loc_data, lldb::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();
if (cu)
s.AddressRange (start_addr + base_addr,
end_addr + base_addr,
cu->GetAddressByteSize(),
NULL,
": ");
uint32_t loc_length = debug_loc_data.GetU16(&offset);
DWARFDataExtractor 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 DWARFDataExtractor& debug_loc_data, lldb::offset_t* offset_ptr, DWARFDataExtractor& 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 DWARFDataExtractor& debug_loc_data, lldb::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;
}
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