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https://github.com/intel/llvm.git
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e1cd1be6d6
due to RTTI worries since llvm and clang don't use RTTI, but I was able to switch back with no issues as far as I can tell. Once the RTTI issue wasn't an issue, we were looking for a way to properly track weak pointers to objects to solve some of the threading issues we have been running into which naturally led us back to std::tr1::weak_ptr. We also wanted the ability to make a shared pointer from just a pointer, which is also easily solved using the std::tr1::enable_shared_from_this class. The main reason for this move back is so we can start properly having weak references to objects. Currently a lldb_private::Thread class has a refrence to its parent lldb_private::Process. This doesn't work well when we now hand out a SBThread object that contains a shared pointer to a lldb_private::Thread as this SBThread can be held onto by external clients and if they end up using one of these objects we can easily crash. So the next task is to start adopting std::tr1::weak_ptr where ever it makes sense which we can do with lldb_private::Debugger, lldb_private::Target, lldb_private::Process, lldb_private::Thread, lldb_private::StackFrame, and many more objects now that they are no longer using intrusive ref counted pointer objects (you can't do std::tr1::weak_ptr functionality with intrusive pointers). llvm-svn: 149207
395 lines
10 KiB
C++
395 lines
10 KiB
C++
//===-- Symbol.cpp ----------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Symbol/Symbol.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/Section.h"
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#include "lldb/Core/Stream.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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using namespace lldb;
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using namespace lldb_private;
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Symbol::Symbol() :
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SymbolContextScope (),
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m_uid (UINT32_MAX),
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m_mangled (),
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m_type_data (0),
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m_type_data_resolved (false),
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m_is_synthetic (false),
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m_is_debug (false),
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m_is_external (false),
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m_size_is_sibling (false),
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m_size_is_synthesized (false),
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m_type (eSymbolTypeInvalid),
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m_flags (),
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m_addr_range ()
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{
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}
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Symbol::Symbol
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(
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uint32_t symID,
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const char *name,
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bool name_is_mangled,
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SymbolType type,
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bool external,
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bool is_debug,
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bool is_trampoline,
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bool is_artificial,
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const Section* section,
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addr_t offset,
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uint32_t size,
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uint32_t flags
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) :
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SymbolContextScope (),
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m_uid (symID),
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m_mangled (name, name_is_mangled),
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m_type_data (0),
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m_type_data_resolved (false),
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m_is_synthetic (is_artificial),
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m_is_debug (is_debug),
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m_is_external (external),
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m_size_is_sibling (false),
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m_size_is_synthesized (false),
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m_type (type),
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m_flags (flags),
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m_addr_range (section, offset, size)
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{
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}
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Symbol::Symbol
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(
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uint32_t symID,
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const char *name,
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bool name_is_mangled,
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SymbolType type,
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bool external,
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bool is_debug,
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bool is_trampoline,
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bool is_artificial,
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const AddressRange &range,
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uint32_t flags
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) :
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SymbolContextScope (),
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m_uid (symID),
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m_mangled (name, name_is_mangled),
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m_type_data (0),
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m_type_data_resolved (false),
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m_is_synthetic (is_artificial),
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m_is_debug (is_debug),
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m_is_external (external),
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m_size_is_sibling (false),
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m_size_is_synthesized (false),
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m_type (type),
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m_flags (flags),
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m_addr_range (range)
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{
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}
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Symbol::Symbol(const Symbol& rhs):
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SymbolContextScope (rhs),
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m_uid (rhs.m_uid),
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m_mangled (rhs.m_mangled),
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m_type_data (rhs.m_type_data),
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m_type_data_resolved (rhs.m_type_data_resolved),
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m_is_synthetic (rhs.m_is_synthetic),
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m_is_debug (rhs.m_is_debug),
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m_is_external (rhs.m_is_external),
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m_size_is_sibling (rhs.m_size_is_sibling),
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m_size_is_synthesized (false),
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m_type (rhs.m_type),
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m_flags (rhs.m_flags),
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m_addr_range (rhs.m_addr_range)
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{
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}
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const Symbol&
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Symbol::operator= (const Symbol& rhs)
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{
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if (this != &rhs)
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{
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SymbolContextScope::operator= (rhs);
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m_uid = rhs.m_uid;
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m_mangled = rhs.m_mangled;
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m_type_data = rhs.m_type_data;
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m_type_data_resolved = rhs.m_type_data_resolved;
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m_is_synthetic = rhs.m_is_synthetic;
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m_is_debug = rhs.m_is_debug;
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m_is_external = rhs.m_is_external;
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m_size_is_sibling = rhs.m_size_is_sibling;
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m_size_is_synthesized = rhs.m_size_is_sibling;
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m_type = rhs.m_type;
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m_flags = rhs.m_flags;
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m_addr_range = rhs.m_addr_range;
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}
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return *this;
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}
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void
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Symbol::Clear()
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{
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m_uid = UINT32_MAX;
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m_mangled.Clear();
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m_type_data = 0;
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m_type_data_resolved = false;
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m_is_synthetic = false;
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m_is_debug = false;
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m_is_external = false;
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m_size_is_sibling = false;
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m_size_is_synthesized = false;
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m_type = eSymbolTypeInvalid;
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m_flags = 0;
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m_addr_range.Clear();
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}
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AddressRange *
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Symbol::GetAddressRangePtr()
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{
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if (m_addr_range.GetBaseAddress().GetSection())
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return &m_addr_range;
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return NULL;
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}
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const AddressRange *
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Symbol::GetAddressRangePtr() const
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{
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if (m_addr_range.GetBaseAddress().GetSection())
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return &m_addr_range;
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return NULL;
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}
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uint32_t
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Symbol::GetSiblingIndex() const
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{
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return m_size_is_sibling ? m_addr_range.GetByteSize() : 0;
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}
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bool
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Symbol::IsTrampoline () const
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{
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return m_type == eSymbolTypeTrampoline;
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}
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void
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Symbol::GetDescription (Stream *s, lldb::DescriptionLevel level, Target *target) const
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{
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*s << "id = " << (const UserID&)*this << ", name = \"" << m_mangled.GetName() << '"';
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const Section *section = m_addr_range.GetBaseAddress().GetSection();
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if (section != NULL)
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{
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if (m_addr_range.GetBaseAddress().IsSectionOffset())
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{
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if (m_addr_range.GetByteSize() > 0)
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{
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s->PutCString (", range = ");
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m_addr_range.Dump(s, target, Address::DumpStyleLoadAddress, Address::DumpStyleFileAddress);
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}
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else
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{
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s->PutCString (", address = ");
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m_addr_range.GetBaseAddress().Dump(s, target, Address::DumpStyleLoadAddress, Address::DumpStyleFileAddress);
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}
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}
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else
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s->Printf (", value = 0x%16.16llx", m_addr_range.GetBaseAddress().GetOffset());
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}
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else
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{
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if (m_size_is_sibling)
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s->Printf (", sibling = %5llu", m_addr_range.GetBaseAddress().GetOffset());
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else
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s->Printf (", value = 0x%16.16llx", m_addr_range.GetBaseAddress().GetOffset());
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}
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}
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void
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Symbol::Dump(Stream *s, Target *target, uint32_t index) const
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{
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// s->Printf("%.*p: ", (int)sizeof(void*) * 2, this);
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// s->Indent();
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// s->Printf("Symbol[%5u] %6u %c%c %-12s ",
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s->Printf("[%5u] %6u %c%c%c %-12s ",
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index,
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GetID(),
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m_is_debug ? 'D' : ' ',
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m_is_synthetic ? 'S' : ' ',
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m_is_external ? 'X' : ' ',
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GetTypeAsString());
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const Section *section = m_addr_range.GetBaseAddress().GetSection();
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if (section != NULL)
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{
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if (!m_addr_range.GetBaseAddress().Dump(s, NULL, Address::DumpStyleFileAddress))
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s->Printf("%*s", 18, "");
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s->PutChar(' ');
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if (!m_addr_range.GetBaseAddress().Dump(s, target, Address::DumpStyleLoadAddress))
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s->Printf("%*s", 18, "");
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const char *format = m_size_is_sibling ?
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" Sibling -> [%5llu] 0x%8.8x %s\n":
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" 0x%16.16llx 0x%8.8x %s\n";
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s->Printf( format,
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m_addr_range.GetByteSize(),
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m_flags,
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m_mangled.GetName().AsCString(""));
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}
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else
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{
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const char *format = m_size_is_sibling ?
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"0x%16.16llx Sibling -> [%5llu] 0x%8.8x %s\n":
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"0x%16.16llx 0x%16.16llx 0x%8.8x %s\n";
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s->Printf( format,
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m_addr_range.GetBaseAddress().GetOffset(),
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m_addr_range.GetByteSize(),
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m_flags,
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m_mangled.GetName().AsCString(""));
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}
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}
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uint32_t
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Symbol::GetPrologueByteSize ()
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{
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if (m_type == eSymbolTypeCode)
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{
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if (!m_type_data_resolved)
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{
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m_type_data_resolved = true;
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Module *module = m_addr_range.GetBaseAddress().GetModulePtr();
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SymbolContext sc;
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if (module && module->ResolveSymbolContextForAddress (m_addr_range.GetBaseAddress(),
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eSymbolContextLineEntry,
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sc))
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{
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m_type_data = sc.line_entry.range.GetByteSize();
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}
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else
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{
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// TODO: expose something in Process to figure out the
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// size of a function prologue.
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}
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}
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return m_type_data;
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}
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return 0;
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}
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void
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Symbol::SetValue(addr_t value)
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{
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m_addr_range.GetBaseAddress().SetSection(NULL);
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m_addr_range.GetBaseAddress().SetOffset(value);
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}
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bool
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Symbol::Compare(const ConstString& name, SymbolType type) const
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{
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if (type == eSymbolTypeAny || m_type == type)
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return m_mangled.GetMangledName() == name || m_mangled.GetDemangledName() == name;
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return false;
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}
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#define ENUM_TO_CSTRING(x) case eSymbolType##x: return #x;
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const char *
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Symbol::GetTypeAsString() const
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{
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switch (m_type)
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{
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ENUM_TO_CSTRING(Invalid);
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ENUM_TO_CSTRING(Absolute);
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ENUM_TO_CSTRING(Code);
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ENUM_TO_CSTRING(Data);
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ENUM_TO_CSTRING(Trampoline);
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ENUM_TO_CSTRING(Runtime);
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ENUM_TO_CSTRING(Exception);
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ENUM_TO_CSTRING(SourceFile);
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ENUM_TO_CSTRING(HeaderFile);
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ENUM_TO_CSTRING(ObjectFile);
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ENUM_TO_CSTRING(CommonBlock);
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ENUM_TO_CSTRING(Block);
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ENUM_TO_CSTRING(Local);
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ENUM_TO_CSTRING(Param);
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ENUM_TO_CSTRING(Variable);
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ENUM_TO_CSTRING(VariableType);
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ENUM_TO_CSTRING(LineEntry);
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ENUM_TO_CSTRING(LineHeader);
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ENUM_TO_CSTRING(ScopeBegin);
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ENUM_TO_CSTRING(ScopeEnd);
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ENUM_TO_CSTRING(Additional);
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ENUM_TO_CSTRING(Compiler);
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ENUM_TO_CSTRING(Instrumentation);
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ENUM_TO_CSTRING(Undefined);
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ENUM_TO_CSTRING(ObjCClass);
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ENUM_TO_CSTRING(ObjCMetaClass);
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ENUM_TO_CSTRING(ObjCIVar);
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default:
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break;
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}
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return "<unknown SymbolType>";
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}
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void
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Symbol::CalculateSymbolContext (SymbolContext *sc)
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{
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// Symbols can reconstruct the symbol and the module in the symbol context
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sc->symbol = this;
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const AddressRange *range = GetAddressRangePtr();
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if (range)
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sc->module_sp = range->GetBaseAddress().GetModuleSP ();
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else
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sc->module_sp.reset();
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}
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Module *
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Symbol::CalculateSymbolContextModule ()
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{
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const AddressRange *range = GetAddressRangePtr();
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if (range)
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return range->GetBaseAddress().GetModulePtr ();
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return NULL;
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}
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Symbol *
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Symbol::CalculateSymbolContextSymbol ()
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{
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return this;
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}
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void
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Symbol::DumpSymbolContext (Stream *s)
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{
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bool dumped_module = false;
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const AddressRange *range = GetAddressRangePtr();
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if (range)
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{
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Module *module = range->GetBaseAddress().GetModulePtr ();
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if (module)
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{
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dumped_module = true;
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module->DumpSymbolContext(s);
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}
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}
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if (dumped_module)
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s->PutCString(", ");
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s->Printf("Symbol{0x%8.8x}", GetID());
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}
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