Greg Clayton 73b472d42a Updated the lldb_private::Flags class to have better method names and made
all of the calls inlined in the header file for better performance.

Fixed the summary for C string types (array of chars (with any combo if
modifiers), and pointers to chars) work in all cases.

Fixed an issue where a forward declaration to a clang type could cause itself
to resolve itself more than once if, during the resolving of the type itself
it caused something to try and resolve itself again. We now remove the clang
type from the forward declaration map in the DWARF parser when we start to 
resolve it and avoid this additional call. This should stop any duplicate
members from appearing and throwing all the alignment of structs, unions and
classes.

llvm-svn: 117437
2010-10-27 03:32:59 +00:00

713 lines
18 KiB
C++

//===-- 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/Module.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
Section::Section
(
Section *parent,
Module* module,
user_id_t sect_id,
const ConstString &name,
SectionType sect_type,
addr_t file_addr,
addr_t byte_size,
uint64_t file_offset,
uint64_t file_size,
uint32_t flags
) :
ModuleChild (module),
UserID (sect_id),
Flags (flags),
m_parent (parent),
m_name (name),
m_type (sect_type),
m_file_addr (file_addr),
m_byte_size (byte_size),
m_file_offset (file_offset),
m_file_size (file_size),
m_children (),
m_fake (false),
m_linked_section(NULL),
m_linked_offset (0)
{
}
Section::~Section()
{
}
// Get a valid shared pointer to this section object
SectionSP
Section::GetSharedPointer() const
{
SectionSP this_sp;
if (m_parent)
this_sp = m_parent->GetChildren().GetSharedPointer (this, false);
else
{
ObjectFile *objfile = m_module->GetObjectFile();
if (objfile)
{
SectionList *section_list = objfile->GetSectionList();
if (section_list)
this_sp = section_list->GetSharedPointer (this, false);
}
}
return this_sp;
}
ConstString&
Section::GetName()
{
if (m_linked_section)
return const_cast<Section *>(m_linked_section)->GetName();
return m_name;
}
const ConstString&
Section::GetName() const
{
if (m_linked_section)
return m_linked_section->GetName();
return m_name;
}
addr_t
Section::GetFileAddress () const
{
if (m_parent)
{
// 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 m_parent->GetFileAddress() + m_file_addr;
}
// This section has no parent, so m_file_addr is the file base address
return m_file_addr;
}
addr_t
Section::GetLinkedFileAddress () const
{
if (m_linked_section)
return m_linked_section->GetFileAddress() + m_linked_offset;
return LLDB_INVALID_ADDRESS;
}
addr_t
Section::GetLoadBaseAddress (Target *target) const
{
addr_t load_base_addr = LLDB_INVALID_ADDRESS;
if (m_linked_section)
{
load_base_addr = m_linked_section->GetLoadBaseAddress(target) + m_linked_offset;
}
else
if (m_parent)
{
load_base_addr = m_parent->GetLoadBaseAddress (target);
if (load_base_addr != LLDB_INVALID_ADDRESS)
load_base_addr += GetOffset();
}
else
{
load_base_addr = target->GetSectionLoadList().GetSectionLoadAddress (this);
}
return load_base_addr;
}
bool
Section::ResolveContainedAddress (addr_t offset, Address &so_addr) const
{
const uint32_t num_children = m_children.GetSize();
if (num_children > 0)
{
for (uint32_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())
return child_section->ResolveContainedAddress (offset - child_offset, so_addr);
}
}
if (m_linked_section)
{
so_addr.SetOffset(m_linked_offset + offset);
so_addr.SetSection(m_linked_section);
}
else
{
so_addr.SetOffset(offset);
so_addr.SetSection(this);
}
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;
return offset < GetByteSize();
}
}
return false;
}
bool
Section::ContainsLinkedFileAddress (addr_t vm_addr) const
{
const addr_t linked_file_addr = GetLinkedFileAddress();
if (linked_file_addr != LLDB_INVALID_ADDRESS)
{
if (linked_file_addr <= vm_addr)
{
const addr_t offset = vm_addr - linked_file_addr;
return offset < GetByteSize();
}
}
return false;
}
int
Section::Compare (const Section& a, const Section& b)
{
if (&a == &b)
return 0;
const Module* a_module = a.GetModule();
const Module* b_module = b.GetModule();
if (a_module == b_module)
{
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 < b_module)
return -1;
else
return 1; // We already know the modules aren't equal
}
}
void
Section::Dump (Stream *s, Target *target) const
{
// s->Printf("%.*p: ", (int)sizeof(void*) * 2, this);
s->Indent();
s->Printf("0x%8.8x %-14s ", 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 0x%8.8llx 0x%8.8llx 0x%8.8x ", resolved ? ' ' : '*', m_file_offset, m_file_size, Get());
DumpName (s);
s->EOL();
if (m_linked_section)
{
addr = LLDB_INVALID_ADDRESS;
if (target)
{
addr = m_linked_section->GetLoadBaseAddress(target);
if (addr != LLDB_INVALID_ADDRESS)
addr += m_linked_offset;
}
if (addr == LLDB_INVALID_ADDRESS)
{
if (target)
resolved = false;
addr = m_linked_section->GetFileAddress() + m_linked_offset;
}
int indent = (sizeof(void*) + 1 + sizeof(user_id_t) + 1) * 2 + 3 + s->GetIndentLevel();
s->Printf("%*.*s", indent, indent, "");
VMRange linked_range(addr, addr + m_byte_size);
linked_range.Dump (s, 0);
indent = 3 * (sizeof(uint32_t) * 2 + 2 + 1) + 1;
s->Printf("%c%*.*s", resolved ? ' ' : '*', indent, indent, "");
m_linked_section->DumpName(s);
s->Printf(" + 0x%llx\n", m_linked_offset);
}
m_children.Dump(s, target, false);
}
void
Section::DumpName (Stream *s) const
{
if (m_linked_section)
return m_linked_section->DumpName(s);
else if (m_parent == NULL)
{
// The top most section prints the module basename
const char *module_basename = m_module->GetFileSpec().GetFilename().AsCString();
if (module_basename && module_basename[0])
s->Printf("%s.", module_basename);
}
else
{
m_parent->DumpName (s);
s->PutChar('.');
}
m_name.Dump(s);
}
//----------------------------------------------------------------------
// Get the section data from a complete contiguous copy of the
// entire executable image.
//----------------------------------------------------------------------
size_t
Section::GetSectionDataFromImage (const DataExtractor& image_data, DataExtractor& section_data) const
{
size_t file_size = GetByteSize();
if (file_size > 0)
{
off_t file_offset = GetFileOffset();
if (section_data.SetData (image_data, file_offset, file_size) == file_size)
return true;
}
return false;
}
size_t
Section::ReadSectionDataFromObjectFile (const ObjectFile* objfile, off_t section_offset, void *dst, size_t dst_len) const
{
if (objfile && dst && dst_len)
{
const FileSpec& file = objfile->GetFileSpec();
if (file)
{
off_t section_file_offset = GetFileOffset() + objfile->GetOffset() + section_offset;
return file.ReadFileContents (section_file_offset, dst, dst_len);
}
}
return 0;
}
//----------------------------------------------------------------------
// Get the section data the file on disk
//----------------------------------------------------------------------
size_t
Section::ReadSectionDataFromObjectFile(const ObjectFile* objfile, DataExtractor& section_data) const
{
if (objfile == NULL)
return 0;
const FileSpec& file = objfile->GetFileSpec();
if (file)
{
size_t section_file_size = GetByteSize();
if (section_file_size > 0)
{
off_t section_file_offset = GetFileOffset() + objfile->GetOffset();
DataBufferSP section_data_sp(file.ReadFileContents(section_file_offset, section_file_size));
section_data.SetByteOrder(objfile->GetByteOrder());
section_data.SetAddressByteSize(objfile->GetAddressByteSize());
return section_data.SetData (section_data_sp);
}
}
return 0;
}
size_t
Section::MemoryMapSectionDataFromObjectFile(const ObjectFile* objfile, DataExtractor& section_data) const
{
if (objfile == NULL)
return 0;
const FileSpec& file = objfile->GetFileSpec();
if (file)
{
size_t section_file_size = GetFileSize();
if (section_file_size > 0)
{
off_t section_file_offset = GetFileOffset() + objfile->GetOffset();
DataBufferSP section_data_sp(file.MemoryMapFileContents(section_file_offset, section_file_size));
section_data.SetByteOrder(objfile->GetByteOrder());
section_data.SetAddressByteSize(objfile->GetAddressByteSize());
return section_data.SetData (section_data_sp);
}
}
return 0;
}
bool
Section::IsDescendant (const Section *section)
{
if (this == section)
return true;
if (m_parent)
return m_parent->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;
}
void
Section::SetLinkedLocation (const Section *linked_section, uint64_t linked_offset)
{
if (linked_section)
m_module = linked_section->GetModule();
m_linked_section = linked_section;
m_linked_offset = linked_offset;
}
#pragma mark SectionList
SectionList::SectionList () :
m_sections()
{
}
SectionList::~SectionList ()
{
}
uint32_t
SectionList::AddSection (SectionSP& sect_sp)
{
uint32_t section_index = m_sections.size();
m_sections.push_back(sect_sp);
return section_index;
}
uint32_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;
}
uint32_t
SectionList::AddUniqueSection (SectionSP& sect_sp)
{
uint32_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, 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 (uint32_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)
{
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)->GetName() == section_dstr)
{
sect_sp = *sect_iter;
}
else
{
sect_sp = (*sect_iter)->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 (lldb::SectionType sect_type, bool check_children, uint32_t start_idx) const
{
SectionSP sect_sp;
uint32_t num_sections = m_sections.size();
for (uint32_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::GetSharedPointer (const Section *section, bool check_children) const
{
SectionSP sect_sp;
if (section)
{
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->get() == section)
{
sect_sp = *sect_iter;
break;
}
else if (check_children)
{
sect_sp = (*sect_iter)->GetChildren().GetSharedPointer (section, true);
}
}
}
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;
}
SectionSP
SectionList::FindSectionContainingLinkedFileAddress (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->ContainsLinkedFileAddress (vm_addr))
{
sect_sp = *sect_iter;
}
else if (depth > 0)
{
sect_sp = sect->GetChildren().FindSectionContainingLinkedFileAddress (vm_addr, depth - 1);
}
}
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) const
{
if (show_header && !m_sections.empty())
{
// s->Printf("%.*p: ", (int)sizeof(void*) * 2, this);
// s->Indent();
// s->PutCString( "SectionList\n");
// s->IndentMore();
// s->Printf("%*s", 2*(sizeof(void *) + 2), "");
s->Indent();
s->Printf("SectID Type %s Address File Off. File Size Flags Section Name\n", (target && target->GetSectionLoadList().IsEmpty() == false) ? "Load" : "File");
// s->Printf("%*s", 2*(sizeof(void *) + 2), "");
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);
}
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;
}