c7bece56fa
Major fixed to allow reading files that are over 4GB. The main problems were that the DataExtractor was using 32 bit offsets as a data cursor, and since we mmap all of our object files we could run into cases where if we had a very large core file that was over 4GB, we were running into the 4GB boundary. So I defined a new "lldb::offset_t" which should be used for all file offsets. After making this change, I enabled warnings for data loss and for enexpected implicit conversions temporarily and found a ton of things that I fixed. Any functions that take an index internally, should use "size_t" for any indexes and also should return "size_t" for any sizes of collections. llvm-svn: 173463
133 lines
3.4 KiB
C++
133 lines
3.4 KiB
C++
//===-- DWARFDebugMacinfoEntry.cpp ------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "DWARFDebugMacinfoEntry.h"
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#include "lldb/Core/Stream.h"
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using namespace lldb_private;
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using namespace std;
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DWARFDebugMacinfoEntry::DWARFDebugMacinfoEntry() :
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m_type_code(0),
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m_line(0),
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m_op2()
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{
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m_op2.cstr = NULL;
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}
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DWARFDebugMacinfoEntry::~DWARFDebugMacinfoEntry()
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{
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}
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const char*
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DWARFDebugMacinfoEntry::GetCString() const
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{
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switch (m_type_code)
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{
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case 0:
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case DW_MACINFO_start_file:
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case DW_MACINFO_end_file:
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return NULL;
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default:
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break;
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}
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return m_op2.cstr;
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}
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void
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DWARFDebugMacinfoEntry::Dump(Stream *s) const
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{
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if (m_type_code)
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{
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s->PutCString(DW_MACINFO_value_to_name(m_type_code));
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switch (m_type_code)
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{
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case DW_MACINFO_define:
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s->Printf(" line:%u #define %s\n", (uint32_t)m_line, m_op2.cstr);
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break;
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case DW_MACINFO_undef:
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s->Printf(" line:%u #undef %s\n", (uint32_t)m_line, m_op2.cstr);
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break;
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default:
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s->Printf(" line:%u str: '%s'\n", (uint32_t)m_line, m_op2.cstr);
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break;
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case DW_MACINFO_start_file:
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s->Printf(" line:%u file index: '%u'\n", (uint32_t)m_line, (uint32_t)m_op2.file_idx);
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break;
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case DW_MACINFO_end_file:
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break;
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}
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}
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else
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{
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s->PutCString(" END\n");
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}
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}
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bool
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DWARFDebugMacinfoEntry::Extract(const DataExtractor& mac_info_data, lldb::offset_t* offset_ptr)
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{
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if (mac_info_data.ValidOffset(*offset_ptr))
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{
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m_type_code = mac_info_data.GetU8(offset_ptr);
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switch (m_type_code)
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{
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case DW_MACINFO_define:
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case DW_MACINFO_undef:
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// 2 operands:
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// Arg 1: operand encodes the line number of the source line on which
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// the relevant defining or undefining pre-processor directives
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// appeared.
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m_line = mac_info_data.GetULEB128(offset_ptr);
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// Arg 2: define string
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m_op2.cstr = mac_info_data.GetCStr(offset_ptr);
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break;
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case DW_MACINFO_start_file:
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// 2 operands:
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// Op 1: line number of the source line on which the inclusion
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// pre-processor directive occurred.
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m_line = mac_info_data.GetULEB128(offset_ptr);
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// Op 2: a source file name index to a file number in the statement
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// information table for the relevant compilation unit.
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m_op2.file_idx = mac_info_data.GetULEB128(offset_ptr);
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break;
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case 0: // End of list
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case DW_MACINFO_end_file:
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// No operands
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m_line = DW_INVALID_OFFSET;
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m_op2.cstr = NULL;
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break;
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default:
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// Vendor specific entries always have a ULEB128 and a string
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m_line = mac_info_data.GetULEB128(offset_ptr);
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m_op2.cstr = mac_info_data.GetCStr(offset_ptr);
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break;
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}
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return true;
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}
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else
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m_type_code = 0;
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return false;
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}
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