forked from OSchip/llvm-project
				
			
		
			
				
	
	
		
			614 lines
		
	
	
		
			20 KiB
		
	
	
	
		
			C++
		
	
	
	
			
		
		
	
	
			614 lines
		
	
	
		
			20 KiB
		
	
	
	
		
			C++
		
	
	
	
//===-- Section.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 "lldb/Core/Section.h"
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#include "lldb/Core/Address.h" // for Address
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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" // for FileSpec
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#include "lldb/Utility/Stream.h"   // for Stream
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#include "lldb/Utility/VMRange.h"  // for VMRange
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#include <inttypes.h> // for PRIx64
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#include <limits>     // for numeric_limits
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#include <utility>    // for distance
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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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static const char *GetSectionTypeAsCString(lldb::SectionType sect_type) {
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  switch (sect_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 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 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 eSectionTypeDWARFDebugLine:
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    return "dwarf-line";
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  case eSectionTypeDWARFDebugLoc:
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    return "dwarf-loc";
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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 eSectionTypeDWARFDebugStr:
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    return "dwarf-str";
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  case eSectionTypeDWARFDebugStrOffsets:
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    return "dwarf-str-offsets";
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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 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, const 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, const 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
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    // the parent section, so the file address for this section is the file
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    // address 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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#ifdef LLDB_CONFIGURATION_DEBUG
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  // For debug builds, ensure that there are no orphaned (i.e., moduleless)
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  // sections.
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  assert(GetModule().get());
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#endif
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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) {
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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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int Section::Compare(const Section &a, const Section &b) {
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  if (&a == &b)
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    return 0;
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  const ModuleSP a_module_sp = a.GetModule();
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  const ModuleSP b_module_sp = b.GetModule();
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  if (a_module_sp == b_module_sp) {
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    user_id_t a_sect_uid = a.GetID();
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    user_id_t b_sect_uid = b.GetID();
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    if (a_sect_uid < b_sect_uid)
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      return -1;
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    if (a_sect_uid > b_sect_uid)
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      return 1;
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    return 0;
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  } else {
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    // The modules are different, just compare the module pointers
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    if (a_module_sp.get() < b_module_sp.get())
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      return -1;
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    else
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      return 1; // We already know the modules aren't equal
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  }
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}
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void Section::Dump(Stream *s, Target *target, uint32_t depth) const {
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  //    s->Printf("%.*p: ", (int)sizeof(void*) * 2, this);
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  s->Indent();
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  s->Printf("0x%8.8" PRIx64 " %-16s ", GetID(),
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            GetSectionTypeAsCString(m_type));
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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->Printf("%39s", "");
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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->Printf("%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' : '-', m_file_offset,
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            m_file_size, Get());
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  DumpName(s);
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  s->EOL();
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  if (depth > 0)
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    m_children.Dump(s, target, false, depth - 1);
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}
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void Section::DumpName(Stream *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->PutChar('.');
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  } else {
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    // The top most section prints the module basename
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    const char *name = NULL;
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    ModuleSP module_sp(GetModule());
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    const FileSpec &file_spec = m_obj_file->GetFileSpec();
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    if (m_obj_file)
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      name = file_spec.GetFilename().AsCString();
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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->Printf("%s.", name);
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  }
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  m_name.Dump(s);
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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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//------------------------------------------------------------------
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/// Get the permissions as OR'ed bits from lldb::Permissions
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//------------------------------------------------------------------
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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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//------------------------------------------------------------------
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/// Set the permissions using bits OR'ed from lldb::Permissions
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//------------------------------------------------------------------
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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() : m_sections() {}
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 | 
						|
SectionList::~SectionList() {}
 | 
						|
 | 
						|
SectionList &SectionList::operator=(const SectionList &rhs) {
 | 
						|
  if (this != &rhs)
 | 
						|
    m_sections = rhs.m_sections;
 | 
						|
  return *this;
 | 
						|
}
 | 
						|
 | 
						|
size_t SectionList::AddSection(const lldb::SectionSP §ion_sp) {
 | 
						|
  if (section_sp) {
 | 
						|
    size_t section_index = m_sections.size();
 | 
						|
    m_sections.push_back(section_sp);
 | 
						|
    return section_index;
 | 
						|
  }
 | 
						|
 | 
						|
  return std::numeric_limits<size_t>::max();
 | 
						|
}
 | 
						|
 | 
						|
// Warning, this can be slow as it's removing items from a std::vector.
 | 
						|
bool SectionList::DeleteSection(size_t idx) {
 | 
						|
  if (idx < m_sections.size()) {
 | 
						|
    m_sections.erase(m_sections.begin() + idx);
 | 
						|
    return true;
 | 
						|
  }
 | 
						|
  return false;
 | 
						|
}
 | 
						|
 | 
						|
size_t SectionList::FindSectionIndex(const Section *sect) {
 | 
						|
  iterator sect_iter;
 | 
						|
  iterator begin = m_sections.begin();
 | 
						|
  iterator end = m_sections.end();
 | 
						|
  for (sect_iter = begin; sect_iter != end; ++sect_iter) {
 | 
						|
    if (sect_iter->get() == sect) {
 | 
						|
      // The secton was already in this section list
 | 
						|
      return std::distance(begin, sect_iter);
 | 
						|
    }
 | 
						|
  }
 | 
						|
  return UINT32_MAX;
 | 
						|
}
 | 
						|
 | 
						|
size_t SectionList::AddUniqueSection(const lldb::SectionSP §_sp) {
 | 
						|
  size_t sect_idx = FindSectionIndex(sect_sp.get());
 | 
						|
  if (sect_idx == UINT32_MAX) {
 | 
						|
    sect_idx = AddSection(sect_sp);
 | 
						|
  }
 | 
						|
  return sect_idx;
 | 
						|
}
 | 
						|
 | 
						|
bool SectionList::ReplaceSection(user_id_t sect_id,
 | 
						|
                                 const lldb::SectionSP §_sp,
 | 
						|
                                 uint32_t depth) {
 | 
						|
  iterator sect_iter, end = m_sections.end();
 | 
						|
  for (sect_iter = m_sections.begin(); sect_iter != end; ++sect_iter) {
 | 
						|
    if ((*sect_iter)->GetID() == sect_id) {
 | 
						|
      *sect_iter = sect_sp;
 | 
						|
      return true;
 | 
						|
    } else if (depth > 0) {
 | 
						|
      if ((*sect_iter)
 | 
						|
              ->GetChildren()
 | 
						|
              .ReplaceSection(sect_id, sect_sp, depth - 1))
 | 
						|
        return true;
 | 
						|
    }
 | 
						|
  }
 | 
						|
  return false;
 | 
						|
}
 | 
						|
 | 
						|
size_t SectionList::GetNumSections(uint32_t depth) const {
 | 
						|
  size_t count = m_sections.size();
 | 
						|
  if (depth > 0) {
 | 
						|
    const_iterator sect_iter, end = m_sections.end();
 | 
						|
    for (sect_iter = m_sections.begin(); sect_iter != end; ++sect_iter) {
 | 
						|
      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(const ConstString §ion_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() == NULL; ++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() == NULL; ++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() == NULL; ++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() == NULL && !sect->IsFake())
 | 
						|
        sect_sp = *sect_iter;
 | 
						|
    }
 | 
						|
  }
 | 
						|
  return sect_sp;
 | 
						|
}
 | 
						|
 | 
						|
bool SectionList::ContainsSection(user_id_t sect_id) const {
 | 
						|
  return FindSectionByID(sect_id).get() != NULL;
 | 
						|
}
 | 
						|
 | 
						|
void SectionList::Dump(Stream *s, 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();
 | 
						|
    s->Printf("SectID     Type             %s Address                          "
 | 
						|
              "   Perm File Off.  File Size  Flags "
 | 
						|
              "     Section Name\n",
 | 
						|
              target_has_loaded_sections ? "Load" : "File");
 | 
						|
    s->Indent();
 | 
						|
    s->PutCString("---------- ---------------- "
 | 
						|
                  "---------------------------------------  ---- ---------- "
 | 
						|
                  "---------- "
 | 
						|
                  "---------- ----------------------------\n");
 | 
						|
  }
 | 
						|
 | 
						|
  const_iterator sect_iter;
 | 
						|
  const_iterator end = m_sections.end();
 | 
						|
  for (sect_iter = m_sections.begin(); sect_iter != end; ++sect_iter) {
 | 
						|
    (*sect_iter)->Dump(s, target_has_loaded_sections ? target : NULL, depth);
 | 
						|
  }
 | 
						|
 | 
						|
  if (show_header && !m_sections.empty())
 | 
						|
    s->IndentLess();
 | 
						|
}
 | 
						|
 | 
						|
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;
 | 
						|
}
 |