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llvm-project/lldb/source/Symbol/Symbol.cpp

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//===-- Symbol.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/Symbol/Symbol.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/Section.h"
#include "lldb/Core/Stream.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/Symtab.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
Symbol::Symbol() :
SymbolContextScope (),
m_uid (UINT32_MAX),
m_mangled (),
m_type_data (0),
m_type_data_resolved (false),
m_is_synthetic (false),
m_is_debug (false),
m_is_external (false),
m_size_is_sibling (false),
m_size_is_synthesized (false),
m_calculated_size (false),
m_type (eSymbolTypeInvalid),
m_flags (),
m_addr_range ()
{
}
Symbol::Symbol
(
uint32_t symID,
const char *name,
bool name_is_mangled,
SymbolType type,
bool external,
bool is_debug,
bool is_trampoline,
bool is_artificial,
const lldb::SectionSP &section_sp,
addr_t offset,
uint32_t size,
uint32_t flags
) :
SymbolContextScope (),
m_uid (symID),
m_mangled (ConstString(name), name_is_mangled),
m_type_data (0),
m_type_data_resolved (false),
m_is_synthetic (is_artificial),
m_is_debug (is_debug),
m_is_external (external),
m_size_is_sibling (false),
m_size_is_synthesized (false),
m_calculated_size (size > 0),
m_type (type),
m_flags (flags),
m_addr_range (section_sp, offset, size)
{
}
Symbol::Symbol
(
uint32_t symID,
const char *name,
bool name_is_mangled,
SymbolType type,
bool external,
bool is_debug,
bool is_trampoline,
bool is_artificial,
const AddressRange &range,
uint32_t flags
) :
SymbolContextScope (),
m_uid (symID),
m_mangled (ConstString(name), name_is_mangled),
m_type_data (0),
m_type_data_resolved (false),
m_is_synthetic (is_artificial),
m_is_debug (is_debug),
m_is_external (external),
m_size_is_sibling (false),
m_size_is_synthesized (false),
m_calculated_size (range.GetByteSize() > 0),
m_type (type),
m_flags (flags),
m_addr_range (range)
{
}
Symbol::Symbol(const Symbol& rhs):
SymbolContextScope (rhs),
m_uid (rhs.m_uid),
m_mangled (rhs.m_mangled),
m_type_data (rhs.m_type_data),
m_type_data_resolved (rhs.m_type_data_resolved),
m_is_synthetic (rhs.m_is_synthetic),
m_is_debug (rhs.m_is_debug),
m_is_external (rhs.m_is_external),
m_size_is_sibling (rhs.m_size_is_sibling),
m_size_is_synthesized (false),
m_calculated_size (rhs.m_calculated_size),
m_type (rhs.m_type),
m_flags (rhs.m_flags),
m_addr_range (rhs.m_addr_range)
{
}
const Symbol&
Symbol::operator= (const Symbol& rhs)
{
if (this != &rhs)
{
SymbolContextScope::operator= (rhs);
m_uid = rhs.m_uid;
m_mangled = rhs.m_mangled;
m_type_data = rhs.m_type_data;
m_type_data_resolved = rhs.m_type_data_resolved;
m_is_synthetic = rhs.m_is_synthetic;
m_is_debug = rhs.m_is_debug;
m_is_external = rhs.m_is_external;
m_size_is_sibling = rhs.m_size_is_sibling;
m_size_is_synthesized = rhs.m_size_is_sibling;
m_calculated_size = rhs.m_calculated_size;
m_type = rhs.m_type;
m_flags = rhs.m_flags;
m_addr_range = rhs.m_addr_range;
}
return *this;
}
void
Symbol::Clear()
{
m_uid = UINT32_MAX;
m_mangled.Clear();
m_type_data = 0;
m_type_data_resolved = false;
m_is_synthetic = false;
m_is_debug = false;
m_is_external = false;
m_size_is_sibling = false;
m_size_is_synthesized = false;
m_calculated_size = false;
m_type = eSymbolTypeInvalid;
m_flags = 0;
m_addr_range.Clear();
}
bool
Symbol::ValueIsAddress() const
{
return m_addr_range.GetBaseAddress().GetSection().get() != NULL;
}
uint32_t
Symbol::GetSiblingIndex() const
{
return m_size_is_sibling ? m_addr_range.GetByteSize() : 0;
}
bool
Symbol::IsTrampoline () const
{
return m_type == eSymbolTypeTrampoline;
}
void
Symbol::GetDescription (Stream *s, lldb::DescriptionLevel level, Target *target) const
{
s->Printf("id = {0x%8.8x}", m_uid);
if (m_addr_range.GetBaseAddress().GetSection())
{
if (ValueIsAddress())
{
const lldb::addr_t byte_size = GetByteSize();
if (byte_size > 0)
{
s->PutCString (", range = ");
m_addr_range.Dump(s, target, Address::DumpStyleLoadAddress, Address::DumpStyleFileAddress);
}
else
{
s->PutCString (", address = ");
m_addr_range.GetBaseAddress().Dump(s, target, Address::DumpStyleLoadAddress, Address::DumpStyleFileAddress);
}
}
else
s->Printf (", value = 0x%16.16llx", m_addr_range.GetBaseAddress().GetOffset());
}
else
{
if (m_size_is_sibling)
s->Printf (", sibling = %5llu", m_addr_range.GetBaseAddress().GetOffset());
else
s->Printf (", value = 0x%16.16llx", m_addr_range.GetBaseAddress().GetOffset());
}
if (m_mangled.GetDemangledName())
s->Printf(", name=\"%s\"", m_mangled.GetDemangledName().AsCString());
if (m_mangled.GetMangledName())
s->Printf(", mangled=\"%s\"", m_mangled.GetMangledName().AsCString());
}
void
Symbol::Dump(Stream *s, Target *target, uint32_t index) const
{
// s->Printf("%.*p: ", (int)sizeof(void*) * 2, this);
// s->Indent();
// s->Printf("Symbol[%5u] %6u %c%c %-12s ",
s->Printf("[%5u] %6u %c%c%c %-12s ",
index,
GetID(),
m_is_debug ? 'D' : ' ',
m_is_synthetic ? 'S' : ' ',
m_is_external ? 'X' : ' ',
GetTypeAsString());
// Make sure the size of the symbol is up to date before dumping
GetByteSize();
if (ValueIsAddress())
{
if (!m_addr_range.GetBaseAddress().Dump(s, NULL, Address::DumpStyleFileAddress))
s->Printf("%*s", 18, "");
s->PutChar(' ');
if (!m_addr_range.GetBaseAddress().Dump(s, target, Address::DumpStyleLoadAddress))
s->Printf("%*s", 18, "");
const char *format = m_size_is_sibling ?
" Sibling -> [%5llu] 0x%8.8x %s\n":
" 0x%16.16llx 0x%8.8x %s\n";
s->Printf( format,
GetByteSize(),
m_flags,
m_mangled.GetName().AsCString(""));
}
else
{
const char *format = m_size_is_sibling ?
"0x%16.16llx Sibling -> [%5llu] 0x%8.8x %s\n":
"0x%16.16llx 0x%16.16llx 0x%8.8x %s\n";
s->Printf( format,
m_addr_range.GetBaseAddress().GetOffset(),
GetByteSize(),
m_flags,
m_mangled.GetName().AsCString(""));
}
}
uint32_t
Symbol::GetPrologueByteSize ()
{
if (m_type == eSymbolTypeCode)
{
if (!m_type_data_resolved)
{
m_type_data_resolved = true;
ModuleSP module_sp (m_addr_range.GetBaseAddress().GetModule());
SymbolContext sc;
if (module_sp && module_sp->ResolveSymbolContextForAddress (m_addr_range.GetBaseAddress(),
eSymbolContextLineEntry,
sc))
{
m_type_data = sc.line_entry.range.GetByteSize();
// Sanity check - this may be a function in the middle of code that has debug information, but
// not for this symbol. So the line entries surrounding us won't lie inside our function.
// In that case, the line entry will be bigger than we are, so we do that quick check and
// if that is true, we just return 0.
if (m_type_data >= m_addr_range.GetByteSize())
m_type_data = 0;
}
else
{
// TODO: expose something in Process to figure out the
// size of a function prologue.
}
}
return m_type_data;
}
return 0;
}
bool
Symbol::Compare(const ConstString& name, SymbolType type) const
{
if (type == eSymbolTypeAny || m_type == type)
return m_mangled.GetMangledName() == name || m_mangled.GetDemangledName() == name;
return false;
}
#define ENUM_TO_CSTRING(x) case eSymbolType##x: return #x;
const char *
Symbol::GetTypeAsString() const
{
switch (m_type)
{
ENUM_TO_CSTRING(Invalid);
ENUM_TO_CSTRING(Absolute);
ENUM_TO_CSTRING(Code);
ENUM_TO_CSTRING(Data);
ENUM_TO_CSTRING(Trampoline);
ENUM_TO_CSTRING(Runtime);
ENUM_TO_CSTRING(Exception);
ENUM_TO_CSTRING(SourceFile);
ENUM_TO_CSTRING(HeaderFile);
ENUM_TO_CSTRING(ObjectFile);
ENUM_TO_CSTRING(CommonBlock);
ENUM_TO_CSTRING(Block);
ENUM_TO_CSTRING(Local);
ENUM_TO_CSTRING(Param);
ENUM_TO_CSTRING(Variable);
ENUM_TO_CSTRING(VariableType);
ENUM_TO_CSTRING(LineEntry);
ENUM_TO_CSTRING(LineHeader);
ENUM_TO_CSTRING(ScopeBegin);
ENUM_TO_CSTRING(ScopeEnd);
ENUM_TO_CSTRING(Additional);
ENUM_TO_CSTRING(Compiler);
ENUM_TO_CSTRING(Instrumentation);
ENUM_TO_CSTRING(Undefined);
ENUM_TO_CSTRING(ObjCClass);
ENUM_TO_CSTRING(ObjCMetaClass);
ENUM_TO_CSTRING(ObjCIVar);
default:
break;
}
return "<unknown SymbolType>";
}
void
Symbol::CalculateSymbolContext (SymbolContext *sc)
{
// Symbols can reconstruct the symbol and the module in the symbol context
sc->symbol = this;
if (ValueIsAddress())
sc->module_sp = GetAddress().GetModule();
else
sc->module_sp.reset();
}
ModuleSP
Symbol::CalculateSymbolContextModule ()
{
if (ValueIsAddress())
return GetAddress().GetModule();
return ModuleSP();
}
Symbol *
Symbol::CalculateSymbolContextSymbol ()
{
return this;
}
void
Symbol::DumpSymbolContext (Stream *s)
{
bool dumped_module = false;
if (ValueIsAddress())
{
ModuleSP module_sp (GetAddress().GetModule());
if (module_sp)
{
dumped_module = true;
module_sp->DumpSymbolContext(s);
}
}
if (dumped_module)
s->PutCString(", ");
s->Printf("Symbol{0x%8.8x}", GetID());
}
lldb::addr_t
Symbol::GetByteSize () const
{
addr_t byte_size = m_addr_range.GetByteSize();
if (byte_size == 0 && !m_calculated_size)
{
const_cast<Symbol*>(this)->m_calculated_size = true;
if (ValueIsAddress())
{
ModuleSP module_sp (GetAddress().GetModule());
if (module_sp)
{
ObjectFile *objfile = module_sp->GetObjectFile();
if (objfile)
{
Symtab *symtab = objfile->GetSymtab();
if (symtab)
{
const_cast<Symbol*>(this)->SetByteSize (symtab->CalculateSymbolSize (const_cast<Symbol *>(this)));
byte_size = m_addr_range.GetByteSize();
}
}
}
}
}
return byte_size;
}
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