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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/Target/Process.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
Symbol::Symbol() :
UserID (),
SymbolContextScope (),
m_mangled (),
m_type (eSymbolTypeInvalid),
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_searched_for_function (false),
m_addr_range (),
m_flags (),
m_function (NULL)
{
}
Symbol::Symbol
(
user_id_t symID,
const char *name,
bool name_is_mangled,
SymbolType type,
bool external,
bool is_debug,
bool is_trampoline,
bool is_artificial,
const Section* section,
addr_t offset,
uint32_t size,
uint32_t flags
) :
UserID (symID),
SymbolContextScope (),
m_mangled (name, name_is_mangled),
m_type (type),
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_searched_for_function (false),
m_addr_range (section, offset, size),
m_flags (flags),
m_function (NULL)
{
}
Symbol::Symbol
(
user_id_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
) :
UserID (symID),
SymbolContextScope (),
m_mangled (name, name_is_mangled),
m_type (type),
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_searched_for_function (false),
m_addr_range (range),
m_flags (flags),
m_function (NULL)
{
}
Symbol::Symbol(const Symbol& rhs):
UserID (rhs),
SymbolContextScope (rhs),
m_mangled (rhs.m_mangled),
m_type (rhs.m_type),
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_searched_for_function (false),
m_addr_range (rhs.m_addr_range),
m_flags (rhs.m_flags),
m_function (NULL)
{
}
const Symbol&
Symbol::operator= (const Symbol& rhs)
{
if (this != &rhs)
{
SymbolContextScope::operator= (rhs);
UserID::operator= (rhs);
m_mangled = rhs.m_mangled;
m_type = rhs.m_type;
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_searched_for_function = rhs.m_searched_for_function;
m_addr_range = rhs.m_addr_range;
m_flags = rhs.m_flags;
m_function = rhs.m_function;
}
return *this;
}
AddressRange *
Symbol::GetAddressRangePtr()
{
if (m_addr_range.GetBaseAddress().GetSection())
return &m_addr_range;
return NULL;
}
const AddressRange *
Symbol::GetAddressRangePtr() const
{
if (m_addr_range.GetBaseAddress().GetSection())
return &m_addr_range;
return 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 << "id = " << (const UserID&)*this << ", name = \"" << m_mangled.GetName() << '"';
const Section *section = m_addr_range.GetBaseAddress().GetSection();
if (section != NULL)
{
if (m_addr_range.GetBaseAddress().IsSectionOffset())
{
if (m_addr_range.GetByteSize() > 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
{
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());
}
}
}
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());
const Section *section = m_addr_range.GetBaseAddress().GetSection();
if (section != NULL)
{
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,
m_addr_range.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(),
m_addr_range.GetByteSize(),
m_flags,
m_mangled.GetName().AsCString(""));
}
}
Function *
Symbol::GetFunction ()
{
if (m_function == NULL && !m_searched_for_function)
{
m_searched_for_function = true;
Module *module = m_addr_range.GetBaseAddress().GetModule();
if (module)
{
SymbolContext sc;
if (module->ResolveSymbolContextForAddress(m_addr_range.GetBaseAddress(), eSymbolContextFunction, sc))
m_function = sc.function;
}
}
return m_function;
}
uint32_t
Symbol::GetPrologueByteSize ()
{
if (m_type == eSymbolTypeCode)
{
if (!m_type_data_resolved)
{
m_type_data_resolved = true;
Module *module = m_addr_range.GetBaseAddress().GetModule();
SymbolContext sc;
if (module && module->ResolveSymbolContextForAddress (m_addr_range.GetBaseAddress(),
eSymbolContextLineEntry,
sc))
{
m_type_data = sc.line_entry.range.GetByteSize();
}
else
{
// TODO: expose something in Process to figure out the
// size of a function prologue.
}
}
return m_type_data;
}
return 0;
}
void
Symbol::SetValue(addr_t value)
{
m_addr_range.GetBaseAddress().SetSection(NULL);
m_addr_range.GetBaseAddress().SetOffset(value);
}
bool
Symbol::Compare(const ConstString& name, SymbolType type) const
{
if (m_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(Extern);
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);
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;
const AddressRange *range = GetAddressRangePtr();
if (range)
{
Module *module = range->GetBaseAddress().GetModule ();
if (module)
{
sc->module_sp = module->GetSP();
return;
}
}
sc->module_sp.reset();
}
void
Symbol::DumpSymbolContext (Stream *s)
{
bool dumped_module = false;
const AddressRange *range = GetAddressRangePtr();
if (range)
{
Module *module = range->GetBaseAddress().GetModule ();
if (module)
{
dumped_module = true;
module->DumpSymbolContext(s);
}
}
if (dumped_module)
s->PutCString(", ");
s->Printf("Symbol{0x%8.8x}", GetID());
}
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