forked from OSchip/llvm-project
602 lines
19 KiB
C++
602 lines
19 KiB
C++
//===-- Section.cpp -------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Core/Section.h"
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#include "lldb/Core/Address.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Target/SectionLoadList.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Utility/FileSpec.h"
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#include "lldb/Utility/VMRange.h"
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#include <inttypes.h>
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#include <limits>
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#include <utility>
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namespace lldb_private {
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class DataExtractor;
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}
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using namespace lldb;
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using namespace lldb_private;
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const char *Section::GetTypeAsCString() const {
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switch (m_type) {
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case eSectionTypeInvalid:
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return "invalid";
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case eSectionTypeCode:
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return "code";
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case eSectionTypeContainer:
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return "container";
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case eSectionTypeData:
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return "data";
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case eSectionTypeDataCString:
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return "data-cstr";
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case eSectionTypeDataCStringPointers:
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return "data-cstr-ptr";
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case eSectionTypeDataSymbolAddress:
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return "data-symbol-addr";
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case eSectionTypeData4:
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return "data-4-byte";
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case eSectionTypeData8:
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return "data-8-byte";
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case eSectionTypeData16:
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return "data-16-byte";
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case eSectionTypeDataPointers:
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return "data-ptrs";
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case eSectionTypeDebug:
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return "debug";
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case eSectionTypeZeroFill:
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return "zero-fill";
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case eSectionTypeDataObjCMessageRefs:
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return "objc-message-refs";
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case eSectionTypeDataObjCCFStrings:
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return "objc-cfstrings";
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case eSectionTypeDWARFDebugAbbrev:
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return "dwarf-abbrev";
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case eSectionTypeDWARFDebugAbbrevDwo:
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return "dwarf-abbrev-dwo";
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case eSectionTypeDWARFDebugAddr:
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return "dwarf-addr";
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case eSectionTypeDWARFDebugAranges:
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return "dwarf-aranges";
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case eSectionTypeDWARFDebugCuIndex:
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return "dwarf-cu-index";
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case eSectionTypeDWARFDebugTuIndex:
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return "dwarf-tu-index";
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case eSectionTypeDWARFDebugFrame:
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return "dwarf-frame";
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case eSectionTypeDWARFDebugInfo:
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return "dwarf-info";
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case eSectionTypeDWARFDebugInfoDwo:
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return "dwarf-info-dwo";
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case eSectionTypeDWARFDebugLine:
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return "dwarf-line";
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case eSectionTypeDWARFDebugLineStr:
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return "dwarf-line-str";
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case eSectionTypeDWARFDebugLoc:
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return "dwarf-loc";
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case eSectionTypeDWARFDebugLocDwo:
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return "dwarf-loc-dwo";
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case eSectionTypeDWARFDebugLocLists:
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return "dwarf-loclists";
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case eSectionTypeDWARFDebugLocListsDwo:
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return "dwarf-loclists-dwo";
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case eSectionTypeDWARFDebugMacInfo:
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return "dwarf-macinfo";
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case eSectionTypeDWARFDebugMacro:
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return "dwarf-macro";
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case eSectionTypeDWARFDebugPubNames:
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return "dwarf-pubnames";
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case eSectionTypeDWARFDebugPubTypes:
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return "dwarf-pubtypes";
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case eSectionTypeDWARFDebugRanges:
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return "dwarf-ranges";
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case eSectionTypeDWARFDebugRngLists:
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return "dwarf-rnglists";
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case eSectionTypeDWARFDebugRngListsDwo:
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return "dwarf-rnglists-dwo";
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case eSectionTypeDWARFDebugStr:
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return "dwarf-str";
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case eSectionTypeDWARFDebugStrDwo:
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return "dwarf-str-dwo";
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case eSectionTypeDWARFDebugStrOffsets:
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return "dwarf-str-offsets";
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case eSectionTypeDWARFDebugStrOffsetsDwo:
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return "dwarf-str-offsets-dwo";
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case eSectionTypeDWARFDebugTypes:
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return "dwarf-types";
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case eSectionTypeDWARFDebugTypesDwo:
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return "dwarf-types-dwo";
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case eSectionTypeDWARFDebugNames:
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return "dwarf-names";
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case eSectionTypeELFSymbolTable:
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return "elf-symbol-table";
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case eSectionTypeELFDynamicSymbols:
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return "elf-dynamic-symbols";
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case eSectionTypeELFRelocationEntries:
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return "elf-relocation-entries";
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case eSectionTypeELFDynamicLinkInfo:
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return "elf-dynamic-link-info";
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case eSectionTypeDWARFAppleNames:
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return "apple-names";
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case eSectionTypeDWARFAppleTypes:
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return "apple-types";
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case eSectionTypeDWARFAppleNamespaces:
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return "apple-namespaces";
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case eSectionTypeDWARFAppleObjC:
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return "apple-objc";
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case eSectionTypeEHFrame:
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return "eh-frame";
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case eSectionTypeARMexidx:
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return "ARM.exidx";
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case eSectionTypeARMextab:
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return "ARM.extab";
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case eSectionTypeCompactUnwind:
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return "compact-unwind";
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case eSectionTypeGoSymtab:
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return "go-symtab";
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case eSectionTypeAbsoluteAddress:
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return "absolute";
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case eSectionTypeDWARFGNUDebugAltLink:
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return "dwarf-gnu-debugaltlink";
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case eSectionTypeOther:
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return "regular";
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}
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return "unknown";
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}
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Section::Section(const ModuleSP &module_sp, ObjectFile *obj_file,
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user_id_t sect_id, ConstString name,
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SectionType sect_type, addr_t file_addr, addr_t byte_size,
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lldb::offset_t file_offset, lldb::offset_t file_size,
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uint32_t log2align, uint32_t flags,
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uint32_t target_byte_size /*=1*/)
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: ModuleChild(module_sp), UserID(sect_id), Flags(flags),
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m_obj_file(obj_file), m_type(sect_type), m_parent_wp(), m_name(name),
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m_file_addr(file_addr), m_byte_size(byte_size),
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m_file_offset(file_offset), m_file_size(file_size),
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m_log2align(log2align), m_children(), m_fake(false), m_encrypted(false),
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m_thread_specific(false), m_readable(false), m_writable(false),
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m_executable(false), m_relocated(false), m_target_byte_size(target_byte_size) {
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// printf ("Section::Section(%p): module=%p, sect_id = 0x%16.16" PRIx64 ",
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// addr=[0x%16.16" PRIx64 " - 0x%16.16" PRIx64 "), file [0x%16.16" PRIx64 "
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// - 0x%16.16" PRIx64 "), flags = 0x%8.8x, name = %s\n",
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// this, module_sp.get(), sect_id, file_addr, file_addr +
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// byte_size, file_offset, file_offset + file_size, flags,
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// name.GetCString());
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}
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Section::Section(const lldb::SectionSP &parent_section_sp,
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const ModuleSP &module_sp, ObjectFile *obj_file,
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user_id_t sect_id, ConstString name,
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SectionType sect_type, addr_t file_addr, addr_t byte_size,
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lldb::offset_t file_offset, lldb::offset_t file_size,
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uint32_t log2align, uint32_t flags,
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uint32_t target_byte_size /*=1*/)
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: ModuleChild(module_sp), UserID(sect_id), Flags(flags),
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m_obj_file(obj_file), m_type(sect_type), m_parent_wp(), m_name(name),
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m_file_addr(file_addr), m_byte_size(byte_size),
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m_file_offset(file_offset), m_file_size(file_size),
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m_log2align(log2align), m_children(), m_fake(false), m_encrypted(false),
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m_thread_specific(false), m_readable(false), m_writable(false),
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m_executable(false), m_relocated(false), m_target_byte_size(target_byte_size) {
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// printf ("Section::Section(%p): module=%p, sect_id = 0x%16.16" PRIx64 ",
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// addr=[0x%16.16" PRIx64 " - 0x%16.16" PRIx64 "), file [0x%16.16" PRIx64 "
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// - 0x%16.16" PRIx64 "), flags = 0x%8.8x, name = %s.%s\n",
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// this, module_sp.get(), sect_id, file_addr, file_addr +
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// byte_size, file_offset, file_offset + file_size, flags,
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// parent_section_sp->GetName().GetCString(), name.GetCString());
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if (parent_section_sp)
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m_parent_wp = parent_section_sp;
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}
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Section::~Section() {
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// printf ("Section::~Section(%p)\n", this);
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}
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addr_t Section::GetFileAddress() const {
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SectionSP parent_sp(GetParent());
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if (parent_sp) {
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// This section has a parent which means m_file_addr is an offset into the
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// parent section, so the file address for this section is the file address
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// of the parent plus the offset
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return parent_sp->GetFileAddress() + m_file_addr;
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}
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// This section has no parent, so m_file_addr is the file base address
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return m_file_addr;
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}
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bool Section::SetFileAddress(lldb::addr_t file_addr) {
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SectionSP parent_sp(GetParent());
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if (parent_sp) {
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if (m_file_addr >= file_addr)
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return parent_sp->SetFileAddress(m_file_addr - file_addr);
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return false;
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} else {
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// This section has no parent, so m_file_addr is the file base address
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m_file_addr = file_addr;
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return true;
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}
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}
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lldb::addr_t Section::GetOffset() const {
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// This section has a parent which means m_file_addr is an offset.
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SectionSP parent_sp(GetParent());
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if (parent_sp)
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return m_file_addr;
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// This section has no parent, so there is no offset to be had
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return 0;
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}
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addr_t Section::GetLoadBaseAddress(Target *target) const {
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addr_t load_base_addr = LLDB_INVALID_ADDRESS;
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SectionSP parent_sp(GetParent());
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if (parent_sp) {
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load_base_addr = parent_sp->GetLoadBaseAddress(target);
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if (load_base_addr != LLDB_INVALID_ADDRESS)
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load_base_addr += GetOffset();
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}
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if (load_base_addr == LLDB_INVALID_ADDRESS) {
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load_base_addr = target->GetSectionLoadList().GetSectionLoadAddress(
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const_cast<Section *>(this)->shared_from_this());
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}
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return load_base_addr;
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}
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bool Section::ResolveContainedAddress(addr_t offset, Address &so_addr,
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bool allow_section_end) const {
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const size_t num_children = m_children.GetSize();
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for (size_t i = 0; i < num_children; i++) {
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Section *child_section = m_children.GetSectionAtIndex(i).get();
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addr_t child_offset = child_section->GetOffset();
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if (child_offset <= offset &&
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offset - child_offset <
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child_section->GetByteSize() + (allow_section_end ? 1 : 0))
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return child_section->ResolveContainedAddress(offset - child_offset,
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so_addr, allow_section_end);
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}
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so_addr.SetOffset(offset);
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so_addr.SetSection(const_cast<Section *>(this)->shared_from_this());
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// Ensure that there are no orphaned (i.e., moduleless) sections.
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assert(GetModule().get());
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return true;
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}
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bool Section::ContainsFileAddress(addr_t vm_addr) const {
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const addr_t file_addr = GetFileAddress();
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if (file_addr != LLDB_INVALID_ADDRESS && !IsThreadSpecific()) {
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if (file_addr <= vm_addr) {
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const addr_t offset = (vm_addr - file_addr) * m_target_byte_size;
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return offset < GetByteSize();
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}
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}
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return false;
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}
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void Section::Dump(llvm::raw_ostream &s, unsigned indent, Target *target,
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uint32_t depth) const {
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s.indent(indent);
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s << llvm::format("0x%8.8" PRIx64 " %-16s ", GetID(), GetTypeAsCString());
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bool resolved = true;
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addr_t addr = LLDB_INVALID_ADDRESS;
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if (GetByteSize() == 0)
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s.indent(39);
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else {
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if (target)
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addr = GetLoadBaseAddress(target);
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if (addr == LLDB_INVALID_ADDRESS) {
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if (target)
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resolved = false;
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addr = GetFileAddress();
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}
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VMRange range(addr, addr + m_byte_size);
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range.Dump(s, 0);
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}
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s << llvm::format("%c %c%c%c 0x%8.8" PRIx64 " 0x%8.8" PRIx64 " 0x%8.8x ",
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resolved ? ' ' : '*', m_readable ? 'r' : '-',
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m_writable ? 'w' : '-', m_executable ? 'x' : '-',
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m_file_offset, m_file_size, Get());
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DumpName(s);
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s << "\n";
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if (depth > 0)
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m_children.Dump(s, indent, target, false, depth - 1);
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}
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void Section::DumpName(llvm::raw_ostream &s) const {
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SectionSP parent_sp(GetParent());
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if (parent_sp) {
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parent_sp->DumpName(s);
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s << '.';
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} else {
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// The top most section prints the module basename
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const char *name = nullptr;
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ModuleSP module_sp(GetModule());
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if (m_obj_file) {
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const FileSpec &file_spec = m_obj_file->GetFileSpec();
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name = file_spec.GetFilename().AsCString();
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}
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if ((!name || !name[0]) && module_sp)
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name = module_sp->GetFileSpec().GetFilename().AsCString();
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if (name && name[0])
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s << name << '.';
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}
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s << m_name;
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}
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bool Section::IsDescendant(const Section *section) {
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if (this == section)
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return true;
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SectionSP parent_sp(GetParent());
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if (parent_sp)
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return parent_sp->IsDescendant(section);
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return false;
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}
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bool Section::Slide(addr_t slide_amount, bool slide_children) {
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if (m_file_addr != LLDB_INVALID_ADDRESS) {
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if (slide_amount == 0)
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return true;
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m_file_addr += slide_amount;
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if (slide_children)
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m_children.Slide(slide_amount, slide_children);
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return true;
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}
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return false;
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}
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/// Get the permissions as OR'ed bits from lldb::Permissions
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uint32_t Section::GetPermissions() const {
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uint32_t permissions = 0;
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if (m_readable)
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permissions |= ePermissionsReadable;
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if (m_writable)
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permissions |= ePermissionsWritable;
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if (m_executable)
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permissions |= ePermissionsExecutable;
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return permissions;
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}
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/// Set the permissions using bits OR'ed from lldb::Permissions
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void Section::SetPermissions(uint32_t permissions) {
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m_readable = (permissions & ePermissionsReadable) != 0;
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m_writable = (permissions & ePermissionsWritable) != 0;
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m_executable = (permissions & ePermissionsExecutable) != 0;
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}
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lldb::offset_t Section::GetSectionData(void *dst, lldb::offset_t dst_len,
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lldb::offset_t offset) {
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if (m_obj_file)
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return m_obj_file->ReadSectionData(this, offset, dst, dst_len);
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return 0;
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}
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lldb::offset_t Section::GetSectionData(DataExtractor §ion_data) {
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if (m_obj_file)
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return m_obj_file->ReadSectionData(this, section_data);
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return 0;
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}
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#pragma mark SectionList
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SectionList &SectionList::operator=(const SectionList &rhs) {
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if (this != &rhs)
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m_sections = rhs.m_sections;
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return *this;
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}
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size_t SectionList::AddSection(const lldb::SectionSP §ion_sp) {
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if (section_sp) {
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size_t section_index = m_sections.size();
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m_sections.push_back(section_sp);
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return section_index;
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}
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return std::numeric_limits<size_t>::max();
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}
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// Warning, this can be slow as it's removing items from a std::vector.
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bool SectionList::DeleteSection(size_t idx) {
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if (idx < m_sections.size()) {
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m_sections.erase(m_sections.begin() + idx);
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return true;
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}
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return false;
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}
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size_t SectionList::FindSectionIndex(const Section *sect) {
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iterator sect_iter;
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iterator begin = m_sections.begin();
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iterator end = m_sections.end();
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for (sect_iter = begin; sect_iter != end; ++sect_iter) {
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if (sect_iter->get() == sect) {
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// The secton was already in this section list
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return std::distance(begin, sect_iter);
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}
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}
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return UINT32_MAX;
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}
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size_t SectionList::AddUniqueSection(const lldb::SectionSP §_sp) {
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size_t sect_idx = FindSectionIndex(sect_sp.get());
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if (sect_idx == UINT32_MAX) {
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sect_idx = AddSection(sect_sp);
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}
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return sect_idx;
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}
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bool SectionList::ReplaceSection(user_id_t sect_id,
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const lldb::SectionSP §_sp,
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uint32_t depth) {
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iterator sect_iter, end = m_sections.end();
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for (sect_iter = m_sections.begin(); sect_iter != end; ++sect_iter) {
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if ((*sect_iter)->GetID() == sect_id) {
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*sect_iter = sect_sp;
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return true;
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} else if (depth > 0) {
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if ((*sect_iter)
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->GetChildren()
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.ReplaceSection(sect_id, sect_sp, depth - 1))
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return true;
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}
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}
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return false;
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}
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size_t SectionList::GetNumSections(uint32_t depth) const {
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size_t count = m_sections.size();
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if (depth > 0) {
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const_iterator sect_iter, end = m_sections.end();
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for (sect_iter = m_sections.begin(); sect_iter != end; ++sect_iter) {
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count += (*sect_iter)->GetChildren().GetNumSections(depth - 1);
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
|
|
SectionSP SectionList::GetSectionAtIndex(size_t idx) const {
|
|
SectionSP sect_sp;
|
|
if (idx < m_sections.size())
|
|
sect_sp = m_sections[idx];
|
|
return sect_sp;
|
|
}
|
|
|
|
SectionSP
|
|
SectionList::FindSectionByName(ConstString section_dstr) const {
|
|
SectionSP sect_sp;
|
|
// Check if we have a valid section string
|
|
if (section_dstr && !m_sections.empty()) {
|
|
const_iterator sect_iter;
|
|
const_iterator end = m_sections.end();
|
|
for (sect_iter = m_sections.begin();
|
|
sect_iter != end && sect_sp.get() == nullptr; ++sect_iter) {
|
|
Section *child_section = sect_iter->get();
|
|
if (child_section) {
|
|
if (child_section->GetName() == section_dstr) {
|
|
sect_sp = *sect_iter;
|
|
} else {
|
|
sect_sp =
|
|
child_section->GetChildren().FindSectionByName(section_dstr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return sect_sp;
|
|
}
|
|
|
|
SectionSP SectionList::FindSectionByID(user_id_t sect_id) const {
|
|
SectionSP sect_sp;
|
|
if (sect_id) {
|
|
const_iterator sect_iter;
|
|
const_iterator end = m_sections.end();
|
|
for (sect_iter = m_sections.begin();
|
|
sect_iter != end && sect_sp.get() == nullptr; ++sect_iter) {
|
|
if ((*sect_iter)->GetID() == sect_id) {
|
|
sect_sp = *sect_iter;
|
|
break;
|
|
} else {
|
|
sect_sp = (*sect_iter)->GetChildren().FindSectionByID(sect_id);
|
|
}
|
|
}
|
|
}
|
|
return sect_sp;
|
|
}
|
|
|
|
SectionSP SectionList::FindSectionByType(SectionType sect_type,
|
|
bool check_children,
|
|
size_t start_idx) const {
|
|
SectionSP sect_sp;
|
|
size_t num_sections = m_sections.size();
|
|
for (size_t idx = start_idx; idx < num_sections; ++idx) {
|
|
if (m_sections[idx]->GetType() == sect_type) {
|
|
sect_sp = m_sections[idx];
|
|
break;
|
|
} else if (check_children) {
|
|
sect_sp = m_sections[idx]->GetChildren().FindSectionByType(
|
|
sect_type, check_children, 0);
|
|
if (sect_sp)
|
|
break;
|
|
}
|
|
}
|
|
return sect_sp;
|
|
}
|
|
|
|
SectionSP SectionList::FindSectionContainingFileAddress(addr_t vm_addr,
|
|
uint32_t depth) const {
|
|
SectionSP sect_sp;
|
|
const_iterator sect_iter;
|
|
const_iterator end = m_sections.end();
|
|
for (sect_iter = m_sections.begin();
|
|
sect_iter != end && sect_sp.get() == nullptr; ++sect_iter) {
|
|
Section *sect = sect_iter->get();
|
|
if (sect->ContainsFileAddress(vm_addr)) {
|
|
// The file address is in this section. We need to make sure one of our
|
|
// child sections doesn't contain this address as well as obeying the
|
|
// depth limit that was passed in.
|
|
if (depth > 0)
|
|
sect_sp = sect->GetChildren().FindSectionContainingFileAddress(
|
|
vm_addr, depth - 1);
|
|
|
|
if (sect_sp.get() == nullptr && !sect->IsFake())
|
|
sect_sp = *sect_iter;
|
|
}
|
|
}
|
|
return sect_sp;
|
|
}
|
|
|
|
bool SectionList::ContainsSection(user_id_t sect_id) const {
|
|
return FindSectionByID(sect_id).get() != nullptr;
|
|
}
|
|
|
|
void SectionList::Dump(llvm::raw_ostream &s, unsigned indent, Target *target,
|
|
bool show_header, uint32_t depth) const {
|
|
bool target_has_loaded_sections =
|
|
target && !target->GetSectionLoadList().IsEmpty();
|
|
if (show_header && !m_sections.empty()) {
|
|
s.indent(indent);
|
|
s << llvm::formatv(
|
|
"SectID Type {0} Address "
|
|
" Perm File Off. File Size Flags "
|
|
" Section Name\n",
|
|
target_has_loaded_sections ? "Load" : "File");
|
|
s.indent(indent);
|
|
s << "---------- ---------------- "
|
|
"--------------------------------------- ---- ---------- "
|
|
"---------- "
|
|
"---------- ----------------------------\n";
|
|
}
|
|
|
|
for (const auto §ion_sp : m_sections)
|
|
section_sp->Dump(s, indent, target_has_loaded_sections ? target : nullptr,
|
|
depth);
|
|
}
|
|
|
|
size_t SectionList::Slide(addr_t slide_amount, bool slide_children) {
|
|
size_t count = 0;
|
|
const_iterator pos, end = m_sections.end();
|
|
for (pos = m_sections.begin(); pos != end; ++pos) {
|
|
if ((*pos)->Slide(slide_amount, slide_children))
|
|
++count;
|
|
}
|
|
return count;
|
|
}
|