OSchip
/
llvm-project
mirror of https://github.com/THU-DSP-LAB/llvm-project.git
13
0
Fork 6
Code Issues Packages Projects Releases Wiki Activity
llvm-project/lldb/source/Core/Section.cpp

612 lines
19 KiB
C++
Raw Blame History

//===-- Section.cpp ---------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Core/Section.h"
#include "lldb/Core/Address.h" // for Address
#include "lldb/Core/Module.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/FileSpec.h" // for FileSpec
#include "lldb/Utility/Stream.h" // for Stream
#include "lldb/Utility/VMRange.h" // for VMRange
#include <inttypes.h> // for PRIx64
#include <limits> // for numeric_limits
#include <utility> // for distance
namespace lldb_private {
class DataExtractor;
}
using namespace lldb;
using namespace lldb_private;
static const char *GetSectionTypeAsCString(lldb::SectionType sect_type) {
switch (sect_type) {
case eSectionTypeInvalid:
return "invalid";
case eSectionTypeCode:
return "code";
case eSectionTypeContainer:
return "container";
case eSectionTypeData:
return "data";
case eSectionTypeDataCString:
return "data-cstr";
case eSectionTypeDataCStringPointers:
return "data-cstr-ptr";
case eSectionTypeDataSymbolAddress:
return "data-symbol-addr";
case eSectionTypeData4:
return "data-4-byte";
case eSectionTypeData8:
return "data-8-byte";
case eSectionTypeData16:
return "data-16-byte";
case eSectionTypeDataPointers:
return "data-ptrs";
case eSectionTypeDebug:
return "debug";
case eSectionTypeZeroFill:
return "zero-fill";
case eSectionTypeDataObjCMessageRefs:
return "objc-message-refs";
case eSectionTypeDataObjCCFStrings:
return "objc-cfstrings";
case eSectionTypeDWARFDebugAbbrev:
return "dwarf-abbrev";
case eSectionTypeDWARFDebugAddr:
return "dwarf-addr";
case eSectionTypeDWARFDebugAranges:
return "dwarf-aranges";
case eSectionTypeDWARFDebugFrame:
return "dwarf-frame";
case eSectionTypeDWARFDebugInfo:
return "dwarf-info";
case eSectionTypeDWARFDebugLine:
return "dwarf-line";
case eSectionTypeDWARFDebugLoc:
return "dwarf-loc";
case eSectionTypeDWARFDebugMacInfo:
return "dwarf-macinfo";
case eSectionTypeDWARFDebugMacro:
return "dwarf-macro";
case eSectionTypeDWARFDebugPubNames:
return "dwarf-pubnames";
case eSectionTypeDWARFDebugPubTypes:
return "dwarf-pubtypes";
case eSectionTypeDWARFDebugRanges:
return "dwarf-ranges";
case eSectionTypeDWARFDebugStr:
return "dwarf-str";
case eSectionTypeDWARFDebugStrOffsets:
return "dwarf-str-offsets";
case eSectionTypeELFSymbolTable:
return "elf-symbol-table";
case eSectionTypeELFDynamicSymbols:
return "elf-dynamic-symbols";
case eSectionTypeELFRelocationEntries:
return "elf-relocation-entries";
case eSectionTypeELFDynamicLinkInfo:
return "elf-dynamic-link-info";
case eSectionTypeDWARFAppleNames:
return "apple-names";
case eSectionTypeDWARFAppleTypes:
return "apple-types";
case eSectionTypeDWARFAppleNamespaces:
return "apple-namespaces";
case eSectionTypeDWARFAppleObjC:
return "apple-objc";
case eSectionTypeEHFrame:
return "eh-frame";
case eSectionTypeARMexidx:
return "ARM.exidx";
case eSectionTypeARMextab:
return "ARM.extab";
case eSectionTypeCompactUnwind:
return "compact-unwind";
case eSectionTypeGoSymtab:
return "go-symtab";
case eSectionTypeAbsoluteAddress:
return "absolute";
case eSectionTypeOther:
return "regular";
}
return "unknown";
}
Section::Section(const ModuleSP &module_sp, ObjectFile *obj_file,
user_id_t sect_id, const ConstString &name,
SectionType sect_type, addr_t file_addr, addr_t byte_size,
lldb::offset_t file_offset, lldb::offset_t file_size,
uint32_t log2align, uint32_t flags,
uint32_t target_byte_size /*=1*/)
: ModuleChild(module_sp), UserID(sect_id), Flags(flags),
m_obj_file(obj_file), m_type(sect_type), m_parent_wp(), m_name(name),
m_file_addr(file_addr), m_byte_size(byte_size),
m_file_offset(file_offset), m_file_size(file_size),
m_log2align(log2align), m_children(), m_fake(false), m_encrypted(false),
m_thread_specific(false), m_readable(false), m_writable(false),
m_executable(false), m_target_byte_size(target_byte_size) {
// printf ("Section::Section(%p): module=%p, sect_id = 0x%16.16" PRIx64 ",
// addr=[0x%16.16" PRIx64 " - 0x%16.16" PRIx64 "), file [0x%16.16" PRIx64 "
// - 0x%16.16" PRIx64 "), flags = 0x%8.8x, name = %s\n",
// this, module_sp.get(), sect_id, file_addr, file_addr +
// byte_size, file_offset, file_offset + file_size, flags,
// name.GetCString());
}
Section::Section(const lldb::SectionSP &parent_section_sp,
const ModuleSP &module_sp, ObjectFile *obj_file,
user_id_t sect_id, const ConstString &name,
SectionType sect_type, addr_t file_addr, addr_t byte_size,
lldb::offset_t file_offset, lldb::offset_t file_size,
uint32_t log2align, uint32_t flags,
uint32_t target_byte_size /*=1*/)
: ModuleChild(module_sp), UserID(sect_id), Flags(flags),
m_obj_file(obj_file), m_type(sect_type), m_parent_wp(), m_name(name),
m_file_addr(file_addr), m_byte_size(byte_size),
m_file_offset(file_offset), m_file_size(file_size),
m_log2align(log2align), m_children(), m_fake(false), m_encrypted(false),
m_thread_specific(false), m_readable(false), m_writable(false),
m_executable(false), m_target_byte_size(target_byte_size) {
// printf ("Section::Section(%p): module=%p, sect_id = 0x%16.16" PRIx64 ",
// addr=[0x%16.16" PRIx64 " - 0x%16.16" PRIx64 "), file [0x%16.16" PRIx64 "
// - 0x%16.16" PRIx64 "), flags = 0x%8.8x, name = %s.%s\n",
// this, module_sp.get(), sect_id, file_addr, file_addr +
// byte_size, file_offset, file_offset + file_size, flags,
// parent_section_sp->GetName().GetCString(), name.GetCString());
if (parent_section_sp)
m_parent_wp = parent_section_sp;
}
Section::~Section() {
// printf ("Section::~Section(%p)\n", this);
}
addr_t Section::GetFileAddress() const {
SectionSP parent_sp(GetParent());
if (parent_sp) {
// This section has a parent which means m_file_addr is an offset into
// the parent section, so the file address for this section is the file
// address of the parent plus the offset
return parent_sp->GetFileAddress() + m_file_addr;
}
// This section has no parent, so m_file_addr is the file base address
return m_file_addr;
}
bool Section::SetFileAddress(lldb::addr_t file_addr) {
SectionSP parent_sp(GetParent());
if (parent_sp) {
if (m_file_addr >= file_addr)
return parent_sp->SetFileAddress(m_file_addr - file_addr);
return false;
} else {
// This section has no parent, so m_file_addr is the file base address
m_file_addr = file_addr;
return true;
}
}
lldb::addr_t Section::GetOffset() const {
// This section has a parent which means m_file_addr is an offset.
SectionSP parent_sp(GetParent());
if (parent_sp)
return m_file_addr;
// This section has no parent, so there is no offset to be had
return 0;
}
addr_t Section::GetLoadBaseAddress(Target *target) const {
addr_t load_base_addr = LLDB_INVALID_ADDRESS;
SectionSP parent_sp(GetParent());
if (parent_sp) {
load_base_addr = parent_sp->GetLoadBaseAddress(target);
if (load_base_addr != LLDB_INVALID_ADDRESS)
load_base_addr += GetOffset();
}
if (load_base_addr == LLDB_INVALID_ADDRESS) {
load_base_addr = target->GetSectionLoadList().GetSectionLoadAddress(
const_cast<Section *>(this)->shared_from_this());
}
return load_base_addr;
}
bool Section::ResolveContainedAddress(addr_t offset, Address &so_addr,
bool allow_section_end) const {
const size_t num_children = m_children.GetSize();
for (size_t i = 0; i < num_children; i++) {
Section *child_section = m_children.GetSectionAtIndex(i).get();
addr_t child_offset = child_section->GetOffset();
if (child_offset <= offset &&
offset - child_offset <
child_section->GetByteSize() + (allow_section_end ? 1 : 0))
return child_section->ResolveContainedAddress(offset - child_offset,
so_addr, allow_section_end);
}
so_addr.SetOffset(offset);
so_addr.SetSection(const_cast<Section *>(this)->shared_from_this());
#ifdef LLDB_CONFIGURATION_DEBUG
// For debug builds, ensure that there are no orphaned (i.e., moduleless)
// sections.
assert(GetModule().get());
#endif
return true;
}
bool Section::ContainsFileAddress(addr_t vm_addr) const {
const addr_t file_addr = GetFileAddress();
if (file_addr != LLDB_INVALID_ADDRESS) {
if (file_addr <= vm_addr) {
const addr_t offset = (vm_addr - file_addr) * m_target_byte_size;
return offset < GetByteSize();
}
}
return false;
}
int Section::Compare(const Section &a, const Section &b) {
if (&a == &b)
return 0;
const ModuleSP a_module_sp = a.GetModule();
const ModuleSP b_module_sp = b.GetModule();
if (a_module_sp == b_module_sp) {
user_id_t a_sect_uid = a.GetID();
user_id_t b_sect_uid = b.GetID();
if (a_sect_uid < b_sect_uid)
return -1;
if (a_sect_uid > b_sect_uid)
return 1;
return 0;
} else {
// The modules are different, just compare the module pointers
if (a_module_sp.get() < b_module_sp.get())
return -1;
else
return 1; // We already know the modules aren't equal
}
}
void Section::Dump(Stream *s, Target *target, uint32_t depth) const {
// s->Printf("%.*p: ", (int)sizeof(void*) * 2, this);
s->Indent();
s->Printf("0x%8.8" PRIx64 " %-16s ", GetID(),
GetSectionTypeAsCString(m_type));
bool resolved = true;
addr_t addr = LLDB_INVALID_ADDRESS;
if (GetByteSize() == 0)
s->Printf("%39s", "");
else {
if (target)
addr = GetLoadBaseAddress(target);
if (addr == LLDB_INVALID_ADDRESS) {
if (target)
resolved = false;
addr = GetFileAddress();
}
VMRange range(addr, addr + m_byte_size);
range.Dump(s, 0);
}
s->Printf("%c %c%c%c 0x%8.8" PRIx64 " 0x%8.8" PRIx64 " 0x%8.8x ",
resolved ? ' ' : '*', m_readable ? 'r' : '-',
m_writable ? 'w' : '-', m_executable ? 'x' : '-', m_file_offset,
m_file_size, Get());
DumpName(s);
s->EOL();
if (depth > 0)
m_children.Dump(s, target, false, depth - 1);
}
void Section::DumpName(Stream *s) const {
SectionSP parent_sp(GetParent());
if (parent_sp) {
parent_sp->DumpName(s);
s->PutChar('.');
} else {
// The top most section prints the module basename
const char *name = NULL;
ModuleSP module_sp(GetModule());
const FileSpec &file_spec = m_obj_file->GetFileSpec();
if (m_obj_file)
name = file_spec.GetFilename().AsCString();
if ((!name || !name[0]) && module_sp)
name = module_sp->GetFileSpec().GetFilename().AsCString();
if (name && name[0])
s->Printf("%s.", name);
}
m_name.Dump(s);
}
bool Section::IsDescendant(const Section *section) {
if (this == section)
return true;
SectionSP parent_sp(GetParent());
if (parent_sp)
return parent_sp->IsDescendant(section);
return false;
}
bool Section::Slide(addr_t slide_amount, bool slide_children) {
if (m_file_addr != LLDB_INVALID_ADDRESS) {
if (slide_amount == 0)
return true;
m_file_addr += slide_amount;
if (slide_children)
m_children.Slide(slide_amount, slide_children);
return true;
}
return false;
}
//------------------------------------------------------------------
/// Get the permissions as OR'ed bits from lldb::Permissions
//------------------------------------------------------------------
uint32_t Section::GetPermissions() const {
uint32_t permissions = 0;
if (m_readable)
permissions |= ePermissionsReadable;
if (m_writable)
permissions |= ePermissionsWritable;
if (m_executable)
permissions |= ePermissionsExecutable;
return permissions;
}
//------------------------------------------------------------------
/// Set the permissions using bits OR'ed from lldb::Permissions
//------------------------------------------------------------------
void Section::SetPermissions(uint32_t permissions) {
m_readable = (permissions & ePermissionsReadable) != 0;
m_writable = (permissions & ePermissionsWritable) != 0;
m_executable = (permissions & ePermissionsExecutable) != 0;
}
lldb::offset_t Section::GetSectionData(void *dst, lldb::offset_t dst_len,
lldb::offset_t offset) {
if (m_obj_file)
return m_obj_file->ReadSectionData(this, offset, dst, dst_len);
return 0;
}
lldb::offset_t Section::GetSectionData(DataExtractor &section_data) const {
if (m_obj_file)
return m_obj_file->ReadSectionData(this, section_data);
return 0;
}
#pragma mark SectionList
SectionList::SectionList() : m_sections() {}
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 &section_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 &sect_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 &sect_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 &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() == 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;
}
Reference in New Issue View Git Blame Copy Permalink