forked from OSchip/llvm-project
764 lines
23 KiB
C++
764 lines
23 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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#include <cxxabi.h>
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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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#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 char *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 && s[0])
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{
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SetValue(s, mangled);
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}
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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 char *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.SetCString (s);
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}
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else
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{
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m_demangled.SetCString(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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//----------------------------------------------------------------------
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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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// We already know mangled is valid from the above check,
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// lets just make sure it isn't empty...
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const char * mangled = m_mangled.AsCString();
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// Don't bother running anything that doesn't start with _Z through the demangler
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if (mangled[0] == '_' && mangled[1] == 'Z')
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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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char *demangled_name = abi::__cxa_demangle (mangled, NULL, NULL, NULL);
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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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// Mangled name get accessor
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//----------------------------------------------------------------------
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ConstString&
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Mangled::GetMangledName ()
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{
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return m_mangled;
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}
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//----------------------------------------------------------------------
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// Mangled name const get accessor
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//----------------------------------------------------------------------
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const ConstString&
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Mangled::GetMangledName () const
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{
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return m_mangled;
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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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// Generate the tokens from the demangled name.
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//
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// Returns the number of tokens that were parsed.
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//----------------------------------------------------------------------
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size_t
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Mangled::GetTokens (Mangled::TokenList &tokens) const
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{
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tokens.Clear();
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const ConstString& demangled = GetDemangledName();
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if (demangled && !demangled.IsEmpty())
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tokens.Parse(demangled.AsCString());
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return tokens.Size();
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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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#pragma mark Mangled::Token
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//--------------------------------------------------------------
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// Default constructor
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//--------------------------------------------------------------
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Mangled::Token::Token () :
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type(eInvalid),
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value()
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{
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}
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//--------------------------------------------------------------
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// Equal to operator
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//--------------------------------------------------------------
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bool
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Mangled::Token::operator== (const Token& rhs) const
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{
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return type == rhs.type && value == rhs.value;
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}
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//--------------------------------------------------------------
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// Dump the token to a stream "s"
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//--------------------------------------------------------------
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void
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Mangled::Token::Dump (Stream *s) const
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{
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switch (type)
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{
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case eInvalid: s->PutCString("invalid "); break;
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case eNameSpace: s->PutCString("namespace "); break;
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case eMethodName: s->PutCString("method "); break;
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case eType: s->PutCString("type "); break;
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case eTemplate: s->PutCString("template "); break;
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case eTemplateBeg: s->PutCString("template < "); break;
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case eTemplateEnd: s->PutCString("template > "); break;
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case eParamsBeg: s->PutCString("params ( "); break;
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case eParamsEnd: s->PutCString("params ) "); break;
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case eQualifier: s->PutCString("qualifier "); break;
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case eError: s->PutCString("ERROR "); break;
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default:
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s->Printf("type = %i", type);
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break;
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}
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value.DumpDebug(s);
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}
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//--------------------------------------------------------------
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// Returns true if this token is a wildcard
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//--------------------------------------------------------------
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bool
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Mangled::Token::IsWildcard () const
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{
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static ConstString g_wildcard_str("*");
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return value == g_wildcard_str;
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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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lldb_private::operator << (Stream& s, const Mangled::Token& obj)
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{
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obj.Dump(&s);
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return s;
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}
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#pragma mark Mangled::TokenList
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//----------------------------------------------------------------------
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// Mangled::TokenList
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//----------------------------------------------------------------------
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//--------------------------------------------------------------
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// Default constructor. If demangled is non-NULL and not-empty
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// the token list will parse up the demangled string it is
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// given, else the object will initialize an empty token list.
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//--------------------------------------------------------------
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Mangled::TokenList::TokenList (const char *demangled) :
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m_tokens()
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{
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if (demangled && demangled[0])
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{
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Parse(demangled);
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}
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}
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//----------------------------------------------------------------------
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// Destructor
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//----------------------------------------------------------------------
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Mangled::TokenList::~TokenList ()
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{
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}
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//----------------------------------------------------------------------
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// Parses "demangled" into tokens. This allows complex
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// comparisons to be done. Comparisons can include wildcards at
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// the namespace, method name, template, and template and
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// parameter type levels.
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//
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// Example queries include:
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// "std::basic_string<*>" // Find all std::basic_string variants
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// "std::basic_string<*>::erase(*)" // Find all std::basic_string::erase variants with any number of parameters
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// "*::clear()" // Find all functions with a method name of
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// // "clear" that are in any namespace that
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// // have no parameters
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// "::printf" // Find the printf function in the global namespace
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// "printf" // Ditto
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// "foo::*(int)" // Find all functions in the class or namespace "foo" that take a single integer argument
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//
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// Returns the number of tokens that were decoded, or zero when
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// we fail.
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//----------------------------------------------------------------------
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size_t
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Mangled::TokenList::Parse (const char *s)
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{
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m_tokens.clear();
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Token token;
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token.type = eNameSpace;
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TokenType max_type = eInvalid;
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const char *p = s;
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size_t span = 0;
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size_t sep_size = 0;
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while (*p != '\0')
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{
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p = p + span + sep_size;
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while (isspace(*p))
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++p;
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if (*p == '\0')
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break;
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span = strcspn(p, ":<>(),");
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sep_size = 1;
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token.type = eInvalid;
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switch (p[span])
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{
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case '\0':
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break;
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case ':':
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if (p[span+1] == ':')
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{
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sep_size = 2;
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if (span > 0)
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{
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token.type = eNameSpace;
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token.value.SetCStringWithLength (p, span);
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m_tokens.push_back(token);
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}
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else
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continue;
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}
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break;
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case '(':
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if (span > 0)
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{
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token.type = eMethodName;
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token.value.SetCStringWithLength (p, span);
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m_tokens.push_back(token);
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}
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token.type = eParamsBeg;
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token.value.Clear();
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m_tokens.push_back(token);
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break;
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case ',':
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if (span > 0)
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{
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token.type = eType;
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token.value.SetCStringWithLength (p, span);
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m_tokens.push_back(token);
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}
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else
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{
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continue;
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}
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break;
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case ')':
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if (span > 0)
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{
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token.type = eType;
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token.value.SetCStringWithLength (p, span);
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m_tokens.push_back(token);
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}
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token.type = eParamsEnd;
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token.value.Clear();
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m_tokens.push_back(token);
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break;
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case '<':
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if (span > 0)
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{
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token.type = eTemplate;
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token.value.SetCStringWithLength (p, span);
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m_tokens.push_back(token);
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}
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token.type = eTemplateBeg;
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token.value.Clear();
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m_tokens.push_back(token);
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break;
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case '>':
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if (span > 0)
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{
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token.type = eType;
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token.value.SetCStringWithLength (p, span);
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m_tokens.push_back(token);
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}
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token.type = eTemplateEnd;
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token.value.Clear();
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m_tokens.push_back(token);
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break;
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}
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if (max_type < token.type)
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max_type = token.type;
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|
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if (token.type == eInvalid)
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{
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if (max_type >= eParamsEnd)
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{
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token.type = eQualifier;
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token.value.SetCString(p);
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m_tokens.push_back(token);
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}
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else if (max_type >= eParamsBeg)
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{
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token.type = eType;
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token.value.SetCString(p);
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m_tokens.push_back(token);
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}
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else
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{
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token.type = eMethodName;
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token.value.SetCString(p);
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m_tokens.push_back(token);
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}
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break;
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}
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}
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return m_tokens.size();
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}
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|
|
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//----------------------------------------------------------------------
|
|
// Clear the token list.
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//----------------------------------------------------------------------
|
|
void
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Mangled::TokenList::Clear ()
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|
{
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m_tokens.clear();
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}
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|
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//----------------------------------------------------------------------
|
|
// Dump the token list to the stream "s"
|
|
//----------------------------------------------------------------------
|
|
void
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Mangled::TokenList::Dump (Stream *s) const
|
|
{
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collection::const_iterator pos;
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collection::const_iterator beg = m_tokens.begin();
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collection::const_iterator end = m_tokens.end();
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|
for (pos = beg; pos != end; ++pos)
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{
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s->Indent("token[");
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*s << (uint32_t)std::distance(beg, pos) << "] = " << *pos << "\n";
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}
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}
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|
|
//----------------------------------------------------------------------
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|
// Find the first token in the list that has "token_type" as its
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// type
|
|
//----------------------------------------------------------------------
|
|
const Mangled::Token *
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Mangled::TokenList::Find (TokenType token_type) const
|
|
{
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|
collection::const_iterator pos;
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|
collection::const_iterator beg = m_tokens.begin();
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|
collection::const_iterator end = m_tokens.end();
|
|
for (pos = beg; pos != end; ++pos)
|
|
{
|
|
if (pos->type == token_type)
|
|
return &(*pos);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Return the token at index "idx", or NULL if the index is
|
|
// out of range.
|
|
//----------------------------------------------------------------------
|
|
const Mangled::Token *
|
|
Mangled::TokenList::GetTokenAtIndex (uint32_t idx) const
|
|
{
|
|
if (idx < m_tokens.size())
|
|
return &m_tokens[idx];
|
|
return NULL;
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// Given a token list, see if it matches this object's tokens.
|
|
// "token_list" can contain wild card values to enable powerful
|
|
// matching. Matching the std::string::erase(*) example that was
|
|
// tokenized above we could use a token list such as:
|
|
//
|
|
// token name
|
|
// ----------- ----------------------------------------
|
|
// eNameSpace "std"
|
|
// eTemplate "basic_string"
|
|
// eTemplateBeg
|
|
// eInvalid "*"
|
|
// eTemplateEnd
|
|
// eMethodName "erase"
|
|
// eParamsBeg
|
|
// eInvalid "*"
|
|
// eParamsEnd
|
|
//
|
|
// Returns true if it "token_list" matches this object's tokens,
|
|
// false otherwise.
|
|
//----------------------------------------------------------------------
|
|
bool
|
|
Mangled::TokenList::MatchesQuery (const Mangled::TokenList &match) const
|
|
{
|
|
size_t match_count = 0;
|
|
collection::const_iterator pos;
|
|
collection::const_iterator pos_end = m_tokens.end();
|
|
|
|
collection::const_iterator match_pos;
|
|
collection::const_iterator match_pos_end = match.m_tokens.end();
|
|
collection::const_iterator match_wildcard_pos = match_pos_end;
|
|
collection::const_iterator match_next_pos = match_pos_end;
|
|
|
|
size_t template_scope_depth = 0;
|
|
|
|
for (pos = m_tokens.begin(), match_pos = match.m_tokens.begin();
|
|
pos != pos_end && match_pos != match_pos_end;
|
|
++match_pos)
|
|
{
|
|
match_next_pos = match_pos + 1;
|
|
// Is this a wildcard?
|
|
if (match_pos->IsWildcard())
|
|
{
|
|
if (match_wildcard_pos != match_pos_end)
|
|
return false; // Can't have two wildcards in effect at once.
|
|
|
|
match_wildcard_pos = match_pos;
|
|
// Are we at the end of the MATCH token list?
|
|
if (match_next_pos == match_pos_end)
|
|
{
|
|
// There is nothing more to match, return if we have any matches so far...
|
|
return match_count > 0;
|
|
}
|
|
}
|
|
|
|
if (match_pos->type == eInvalid || match_pos->type == eError)
|
|
{
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
if (match_pos->type == eTemplateBeg)
|
|
{
|
|
++template_scope_depth;
|
|
}
|
|
else if (match_pos->type == eTemplateEnd)
|
|
{
|
|
assert(template_scope_depth > 0);
|
|
--template_scope_depth;
|
|
}
|
|
|
|
// Do we have a wildcard going right now?
|
|
if (match_wildcard_pos == match_pos_end)
|
|
{
|
|
// No wildcard matching right now, just check and see if things match
|
|
if (*pos == *match_pos)
|
|
++match_count;
|
|
else
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
// We have a wildcard match going
|
|
|
|
// For template types we need to make sure to match the template depths...
|
|
const size_t start_wildcard_template_scope_depth = template_scope_depth;
|
|
size_t curr_wildcard_template_scope_depth = template_scope_depth;
|
|
while (pos != pos_end)
|
|
{
|
|
if (match_wildcard_pos->type == eNameSpace && pos->type == eParamsBeg)
|
|
return false;
|
|
|
|
if (start_wildcard_template_scope_depth == curr_wildcard_template_scope_depth)
|
|
{
|
|
if (*pos == *match_next_pos)
|
|
{
|
|
++match_count;
|
|
match_pos = match_next_pos;
|
|
match_wildcard_pos = match_pos_end;
|
|
break;
|
|
}
|
|
}
|
|
if (pos->type == eTemplateBeg)
|
|
++curr_wildcard_template_scope_depth;
|
|
else if (pos->type == eTemplateEnd)
|
|
--curr_wildcard_template_scope_depth;
|
|
|
|
|
|
++pos;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pos != pos_end)
|
|
++pos;
|
|
}
|
|
if (match_pos != match_pos_end)
|
|
return false;
|
|
|
|
return match_count > 0;
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// Return the number of tokens in the token collection
|
|
//----------------------------------------------------------------------
|
|
size_t
|
|
Mangled::TokenList::Size () const
|
|
{
|
|
return m_tokens.size();
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// Stream out the tokens
|
|
//----------------------------------------------------------------------
|
|
Stream&
|
|
lldb_private::operator << (Stream& s, const Mangled::TokenList& obj)
|
|
{
|
|
obj.Dump(&s);
|
|
return s;
|
|
}
|