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llvm-project/lldb/source/Core/Section.cpp

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//===-- 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/SectionLoadList.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/ConvertEnum.h"
#include <limits>
using namespace lldb;
using namespace lldb_private;
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_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_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) const
{
const size_t num_children = m_children.GetSize();
if (num_children > 0)
{
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())
return child_section->ResolveContainedAddress (offset - child_offset, so_addr);
}
}
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 0x%8.8" PRIx64 " 0x%8.8" PRIx64 " 0x%8.8x ", resolved ? ' ' : '*', 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;
}
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 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;
}
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