forked from OSchip/llvm-project
323 lines
9.1 KiB
C++
323 lines
9.1 KiB
C++
//===-- Mangled.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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#if defined(__APPLE__)
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#define USE_BUILTIN_LIBCXXABI_DEMANGLER 1
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#endif
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#if defined(USE_BUILTIN_LIBCXXABI_DEMANGLER)
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#include "lldb/Core/cxa_demangle.h"
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#else
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#include <cxxabi.h>
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#endif
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#include "llvm/ADT/DenseMap.h"
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#include "lldb/Core/ConstString.h"
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#include "lldb/Core/Mangled.h"
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#include "lldb/Core/RegularExpression.h"
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#include "lldb/Core/Stream.h"
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#include "lldb/Core/Timer.h"
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#include <ctype.h>
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#include <string.h>
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using namespace lldb_private;
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static inline bool
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cstring_is_mangled (const char *s)
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{
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if (s)
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return s[0] == '_' && s[1] == 'Z';
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return false;
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}
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#pragma mark Mangled
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//----------------------------------------------------------------------
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// Default constructor
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//----------------------------------------------------------------------
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Mangled::Mangled () :
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m_mangled(),
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m_demangled()
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{
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}
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//----------------------------------------------------------------------
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// Constructor with an optional string and a boolean indicating if it is
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// the mangled version.
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//----------------------------------------------------------------------
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Mangled::Mangled (const ConstString &s, bool mangled) :
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m_mangled(),
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m_demangled()
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{
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if (s)
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SetValue(s, mangled);
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}
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Mangled::Mangled (const ConstString &s) :
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m_mangled(),
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m_demangled()
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{
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if (s)
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SetValue(s);
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}
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//----------------------------------------------------------------------
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// Destructor
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//----------------------------------------------------------------------
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Mangled::~Mangled ()
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{
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}
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//----------------------------------------------------------------------
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// Convert to pointer operator. This allows code to check any Mangled
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// objects to see if they contain anything valid using code such as:
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//
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// Mangled mangled(...);
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// if (mangled)
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// { ...
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//----------------------------------------------------------------------
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Mangled::operator void* () const
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{
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return (m_mangled) ? const_cast<Mangled*>(this) : NULL;
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}
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//----------------------------------------------------------------------
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// Logical NOT operator. This allows code to check any Mangled
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// objects to see if they are invalid using code such as:
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//
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// Mangled mangled(...);
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// if (!file_spec)
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// { ...
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//----------------------------------------------------------------------
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bool
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Mangled::operator! () const
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{
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return !m_mangled;
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}
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//----------------------------------------------------------------------
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// Clear the mangled and demangled values.
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//----------------------------------------------------------------------
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void
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Mangled::Clear ()
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{
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m_mangled.Clear();
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m_demangled.Clear();
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}
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//----------------------------------------------------------------------
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// Compare the the string values.
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//----------------------------------------------------------------------
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int
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Mangled::Compare (const Mangled& a, const Mangled& b)
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{
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return ConstString::Compare(a.GetName(ePreferMangled), a.GetName(ePreferMangled));
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}
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//----------------------------------------------------------------------
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// Set the string value in this objects. If "mangled" is true, then
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// the mangled named is set with the new value in "s", else the
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// demangled name is set.
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//----------------------------------------------------------------------
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void
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Mangled::SetValue (const ConstString &s, bool mangled)
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{
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if (s)
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{
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if (mangled)
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{
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m_demangled.Clear();
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m_mangled = s;
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}
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else
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{
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m_demangled = s;
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m_mangled.Clear();
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}
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}
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else
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{
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m_demangled.Clear();
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m_mangled.Clear();
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}
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}
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void
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Mangled::SetValue (const ConstString &name)
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{
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if (name)
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{
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if (cstring_is_mangled(name.GetCString()))
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{
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m_demangled.Clear();
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m_mangled = name;
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}
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else
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{
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m_demangled = name;
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m_mangled.Clear();
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}
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}
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else
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{
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m_demangled.Clear();
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m_mangled.Clear();
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}
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}
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//----------------------------------------------------------------------
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// Generate the demangled name on demand using this accessor. Code in
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// this class will need to use this accessor if it wishes to decode
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// the demangled name. The result is cached and will be kept until a
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// new string value is supplied to this object, or until the end of the
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// object's lifetime.
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//----------------------------------------------------------------------
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const ConstString&
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Mangled::GetDemangledName () const
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{
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// Check to make sure we have a valid mangled name and that we
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// haven't already decoded our mangled name.
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if (m_mangled && !m_demangled)
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{
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// We need to generate and cache the demangled name.
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Timer scoped_timer (__PRETTY_FUNCTION__,
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"Mangled::GetDemangledName (m_mangled = %s)",
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m_mangled.GetCString());
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// Don't bother running anything that isn't mangled
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const char *mangled_cstr = m_mangled.GetCString();
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if (cstring_is_mangled(mangled_cstr))
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{
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if (!m_mangled.GetMangledCounterpart(m_demangled))
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{
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// We didn't already mangle this name, demangle it and if all goes well
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// add it to our map.
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#if defined(USE_BUILTIN_LIBCXXABI_DEMANGLER)
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char *demangled_name = lldb_cxxabiv1::__cxa_demangle (mangled_cstr, NULL, NULL, NULL);
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#else
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char *demangled_name = abi::__cxa_demangle (mangled_cstr, NULL, NULL, NULL);
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#endif
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if (demangled_name)
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{
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m_demangled.SetCStringWithMangledCounterpart(demangled_name, m_mangled);
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free (demangled_name);
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}
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}
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}
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if (!m_demangled)
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{
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// Set the demangled string to the empty string to indicate we
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// tried to parse it once and failed.
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m_demangled.SetCString("");
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}
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}
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return m_demangled;
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}
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bool
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Mangled::NameMatches (const RegularExpression& regex) const
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{
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if (m_mangled && regex.Execute (m_mangled.AsCString()))
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return true;
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if (GetDemangledName() && regex.Execute (m_demangled.AsCString()))
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return true;
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return false;
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}
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//----------------------------------------------------------------------
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// Get the demangled name if there is one, else return the mangled name.
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//----------------------------------------------------------------------
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const ConstString&
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Mangled::GetName (Mangled::NamePreference preference) const
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{
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if (preference == ePreferDemangled)
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{
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// Call the accessor to make sure we get a demangled name in case
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// it hasn't been demangled yet...
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if (GetDemangledName())
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return m_demangled;
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return m_mangled;
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}
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else
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{
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if (m_mangled)
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return m_mangled;
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return GetDemangledName();
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}
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}
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//----------------------------------------------------------------------
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// Dump a Mangled object to stream "s". We don't force our
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// demangled name to be computed currently (we don't use the accessor).
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//----------------------------------------------------------------------
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void
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Mangled::Dump (Stream *s) const
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{
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if (m_mangled)
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{
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*s << ", mangled = " << m_mangled;
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}
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if (m_demangled)
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{
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const char * demangled = m_demangled.AsCString();
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s->Printf(", demangled = %s", demangled[0] ? demangled : "<error>");
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}
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}
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//----------------------------------------------------------------------
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// Dumps a debug version of this string with extra object and state
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// information to stream "s".
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//----------------------------------------------------------------------
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void
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Mangled::DumpDebug (Stream *s) const
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{
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s->Printf("%*p: Mangled mangled = ", (int)sizeof(void*) * 2, this);
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m_mangled.DumpDebug(s);
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s->Printf(", demangled = ");
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m_demangled.DumpDebug(s);
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}
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//----------------------------------------------------------------------
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// Return the size in byte that this object takes in memory. The size
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// includes the size of the objects it owns, and not the strings that
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// it references because they are shared strings.
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//----------------------------------------------------------------------
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size_t
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Mangled::MemorySize () const
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{
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return m_mangled.MemorySize() + m_demangled.MemorySize();
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}
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//----------------------------------------------------------------------
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// Dump OBJ to the supplied stream S.
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//----------------------------------------------------------------------
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Stream&
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operator << (Stream& s, const Mangled& obj)
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{
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if (obj.GetMangledName())
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s << "mangled = '" << obj.GetMangledName() << "'";
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const ConstString& demangled = obj.GetDemangledName();
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if (demangled)
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s << ", demangled = '" << demangled << '\'';
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else
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s << ", demangled = <error>";
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return s;
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}
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