bf9a77305f
This moves the following classes from Core -> Utility. ConstString Error RegularExpression Stream StreamString The goal here is to get lldbUtility into a state where it has no dependendencies except on itself and LLVM, so it can be the starting point at which to start untangling LLDB's dependencies. These are all low level and very widely used classes, and previously lldbUtility had dependencies up to lldbCore in order to use these classes. So moving then down to lldbUtility makes sense from both the short term and long term perspective in solving this problem. Differential Revision: https://reviews.llvm.org/D29427 llvm-svn: 293941
125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
//===-- DWARFDebugRanges.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 "DWARFDebugRanges.h"
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#include "SymbolFileDWARF.h"
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#include "lldb/Utility/Stream.h"
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#include <assert.h>
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using namespace lldb_private;
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using namespace std;
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DWARFDebugRanges::DWARFDebugRanges() : m_range_map() {}
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DWARFDebugRanges::~DWARFDebugRanges() {}
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void DWARFDebugRanges::Extract(SymbolFileDWARF *dwarf2Data) {
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DWARFRangeList range_list;
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lldb::offset_t offset = 0;
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dw_offset_t debug_ranges_offset = offset;
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while (Extract(dwarf2Data, &offset, range_list)) {
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range_list.Sort();
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m_range_map[debug_ranges_offset] = range_list;
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debug_ranges_offset = offset;
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}
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}
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bool DWARFDebugRanges::Extract(SymbolFileDWARF *dwarf2Data,
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lldb::offset_t *offset_ptr,
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DWARFRangeList &range_list) {
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range_list.Clear();
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lldb::offset_t range_offset = *offset_ptr;
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const DWARFDataExtractor &debug_ranges_data =
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dwarf2Data->get_debug_ranges_data();
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uint32_t addr_size = debug_ranges_data.GetAddressByteSize();
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while (
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debug_ranges_data.ValidOffsetForDataOfSize(*offset_ptr, 2 * addr_size)) {
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dw_addr_t begin = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
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dw_addr_t end = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
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if (!begin && !end) {
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// End of range list
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break;
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}
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// Extend 4 byte addresses that consists of 32 bits of 1's to be 64 bits
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// of ones
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switch (addr_size) {
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case 2:
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if (begin == 0xFFFFull)
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begin = LLDB_INVALID_ADDRESS;
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break;
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case 4:
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if (begin == 0xFFFFFFFFull)
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begin = LLDB_INVALID_ADDRESS;
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break;
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case 8:
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break;
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default:
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llvm_unreachable("DWARFRangeList::Extract() unsupported address size.");
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}
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// Filter out empty ranges
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if (begin < end)
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range_list.Append(DWARFRangeList::Entry(begin, end - begin));
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}
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// Make sure we consumed at least something
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return range_offset != *offset_ptr;
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}
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void DWARFDebugRanges::Dump(Stream &s,
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const DWARFDataExtractor &debug_ranges_data,
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lldb::offset_t *offset_ptr,
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dw_addr_t cu_base_addr) {
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uint32_t addr_size = s.GetAddressByteSize();
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dw_addr_t base_addr = cu_base_addr;
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while (
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debug_ranges_data.ValidOffsetForDataOfSize(*offset_ptr, 2 * addr_size)) {
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dw_addr_t begin = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
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dw_addr_t end = debug_ranges_data.GetMaxU64(offset_ptr, addr_size);
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// Extend 4 byte addresses that consists of 32 bits of 1's to be 64 bits
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// of ones
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if (begin == 0xFFFFFFFFull && addr_size == 4)
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begin = LLDB_INVALID_ADDRESS;
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s.Indent();
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if (begin == 0 && end == 0) {
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s.PutCString(" End");
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break;
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} else if (begin == LLDB_INVALID_ADDRESS) {
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// A base address selection entry
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base_addr = end;
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s.Address(base_addr, sizeof(dw_addr_t), " Base address = ");
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} else {
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// Convert from offset to an address
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dw_addr_t begin_addr = begin + base_addr;
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dw_addr_t end_addr = end + base_addr;
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s.AddressRange(begin_addr, end_addr, sizeof(dw_addr_t), NULL);
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}
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}
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}
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bool DWARFDebugRanges::FindRanges(dw_addr_t debug_ranges_base,
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dw_offset_t debug_ranges_offset,
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DWARFRangeList &range_list) const {
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dw_addr_t debug_ranges_address = debug_ranges_base + debug_ranges_offset;
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range_map_const_iterator pos = m_range_map.find(debug_ranges_address);
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if (pos != m_range_map.end()) {
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range_list = pos->second;
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return true;
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}
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return false;
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}
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