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gcc/libstdc++-v3/include/bits/demangle.h

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// C++ IA64 / g++ v3 demangler -*- C++ -*-
// Copyright (C) 2003 Free Software Foundation, Inc.
// Written by Carlo Wood <carlo@alinoe.com>
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
#ifndef _DEMANGLER_H
#define _DEMANGLER_H 1
#include <vector>
#include <string>
#ifndef _GLIBCXX_DEMANGLER_DEBUG
#define _GLIBCXX_DEMANGLER_CWDEBUG 0
#define _GLIBCXX_DEMANGLER_DEBUG(x)
#define _GLIBCXX_DEMANGLER_DOUT(cntrl, data)
#define _GLIBCXX_DEMANGLER_DOUT_ENTERING(x)
#define _GLIBCXX_DEMANGLER_DOUT_ENTERING2(x)
#define _GLIBCXX_DEMANGLER_RETURN \
return M_result
#define _GLIBCXX_DEMANGLER_RETURN2 \
return M_result
#define _GLIBCXX_DEMANGLER_FAILURE \
do { M_result = false; return false; } while(0)
#else
#define _GLIBCXX_DEMANGLER_CWDEBUG 1
#endif
// The following defines change the behaviour of the demangler. The
// default behaviour is that none of these macros is defined.
// _GLIBCXX_DEMANGLER_STYLE_VOID
// Default behaviour: int f()
// Uses (void) instead of (): int f(void)
// _GLIBCXX_DEMANGLER_STYLE_LITERAL
// Default behaviour: (long)13,
// (unsigned long long)19
// Use extensions 'u', 'l' and 'll' for integral
// literals (as in template arguments): 13l, 19ull
// _GLIBCXX_DEMANGLER_STYLE_LITERAL_INT
// Default behaviour: 4
// Use also an explicit cast for int in literals: (int)4
namespace __gnu_cxx
{
namespace demangler
{
enum substitution_nt
{
type,
template_template_param,
nested_name_prefix,
nested_name_template_prefix,
unscoped_template_name,
};
struct substitution_st
{
int M_start_pos;
substitution_nt M_type;
int M_number_of_prefixes;
substitution_st(int start_pos,
substitution_nt type,
int number_of_prefixes)
: M_start_pos(start_pos), M_type(type),
M_number_of_prefixes(number_of_prefixes)
{ }
};
enum simple_qualifier_nt
{
complex_or_imaginary = 'G',
pointer = 'P',
reference = 'R'
};
enum cv_qualifier_nt
{
cv_qualifier = 'K'
};
enum param_qualifier_nt
{
vendor_extension = 'U',
array = 'A',
pointer_to_member = 'M'
};
template<typename Allocator>
class qualifier;
template<typename Allocator>
class qualifier_list;
template<typename Allocator>
class session;
template<typename Allocator>
class qualifier
{
typedef std::basic_string<char, std::char_traits<char>, Allocator>
string_type;
private:
char M_qualifier1;
char M_qualifier2;
char M_qualifier3;
mutable unsigned char M_cnt;
string_type M_optional_type;
int M_start_pos;
bool M_part_of_substitution;
public:
qualifier(int start_pos,
simple_qualifier_nt simple_qualifier,
int inside_substitution)
: M_qualifier1(simple_qualifier),
M_start_pos(start_pos),
M_part_of_substitution(inside_substitution)
{ }
qualifier(int start_pos,
cv_qualifier_nt,
char const* start,
int count,
int inside_substitution)
: M_qualifier1(start[0]),
M_qualifier2((count > 1) ? start[1] : '\0'),
M_qualifier3((count > 2) ? start[2] : '\0'),
M_start_pos(start_pos),
M_part_of_substitution(inside_substitution)
{ }
qualifier(int start_pos,
param_qualifier_nt param_qualifier,
string_type optional_type,
int inside_substitution)
: M_qualifier1(param_qualifier),
M_optional_type(optional_type),
M_start_pos(start_pos),
M_part_of_substitution(inside_substitution)
{ }
int
get_start_pos(void) const
{ return M_start_pos; }
char
first_qualifier(void) const
{ M_cnt = 1; return M_qualifier1; }
char
next_qualifier(void) const
{
return (++M_cnt == 2) ? M_qualifier2
: ((M_cnt == 3) ? M_qualifier3 : 0);
}
string_type const&
get_optional_type(void) const
{ return M_optional_type; }
bool
part_of_substitution(void) const
{ return M_part_of_substitution; }
};
template<typename Allocator>
class qualifier_list
{
typedef std::basic_string<char, std::char_traits<char>, Allocator>
string_type;
private:
bool M_printing_suppressed;
std::vector<qualifier<Allocator>, Allocator> M_qualifier_starts;
session<Allocator>& M_demangler;
public:
qualifier_list(session<Allocator>& demangler_obj)
: M_printing_suppressed(false), M_demangler(demangler_obj)
{ }
void
add_qualifier_start(simple_qualifier_nt simple_qualifier,
int start_pos,
int inside_substitution)
{ M_qualifier_starts.
push_back(qualifier<Allocator>(start_pos,
simple_qualifier, inside_substitution)); }
void
add_qualifier_start(cv_qualifier_nt cv_qualifier,
int start_pos,
int count,
int inside_substitution)
{ M_qualifier_starts.
push_back(qualifier<Allocator>(start_pos,
cv_qualifier, &M_demangler.M_str[start_pos],
count, inside_substitution)); }
void
add_qualifier_start(param_qualifier_nt param_qualifier,
int start_pos,
string_type optional_type,
int inside_substitution)
{ M_qualifier_starts.
push_back(qualifier<Allocator>(start_pos,
param_qualifier, optional_type, inside_substitution)); }
void
decode_qualifiers(string_type& prefix,
string_type& postfix,
bool member_function_pointer_qualifiers);
bool
suppressed(void) const
{ return M_printing_suppressed; }
void
printing_suppressed(void)
{ M_printing_suppressed = true; }
size_t
size(void) const
{ return M_qualifier_starts.size(); }
};
template<typename Allocator>
class session
{
friend class qualifier_list<Allocator>;
typedef std::basic_string<char, std::char_traits<char>, Allocator>
string_type;
private:
char const* M_str;
int M_pos;
int M_maxpos;
bool M_result;
int M_inside_template_args;
int M_inside_type;
int M_inside_substitution;
bool M_saw_destructor;
bool M_name_is_cdtor;
bool M_name_is_template;
bool M_name_is_conversion_operator;
bool M_template_args_need_space;
string_type M_function_name;
std::vector<int, Allocator> M_template_arg_pos;
int M_template_arg_pos_offset;
std::vector<substitution_st, Allocator> M_substitutions_pos;
#if _GLIBCXX_DEMANGLER_CWDEBUG
bool M_inside_add_substitution;
#endif
public:
explicit session(char const* in, int len)
: M_str(in), M_pos(0), M_maxpos(len - 1), M_result(true),
M_inside_template_args(0), M_inside_type(0),
M_inside_substitution(0), M_saw_destructor(false),
M_name_is_cdtor(false), M_name_is_template(false),
M_name_is_conversion_operator(false),
M_template_args_need_space(false), M_template_arg_pos_offset(0)
#if _GLIBCXX_DEMANGLER_CWDEBUG
, M_inside_add_substitution(false)
#endif
{ }
static int
decode_encoding(string_type& output, char const* input, int len);
bool
decode_type_with_postfix(string_type& prefix,
string_type& postfix,
qualifier_list<Allocator>* qualifiers = NULL);
bool
decode_type(string_type& output,
qualifier_list<Allocator>* qualifiers = NULL)
{
string_type postfix;
bool res = decode_type_with_postfix(output, postfix, qualifiers);
output += postfix;
return res;
}
bool
remaining_input_characters(void) const
{ return current() != 0; }
private:
char
current(void) const
{ return (M_pos > M_maxpos) ? 0 : M_str[M_pos]; }
char
next(void)
{ return (M_pos >= M_maxpos) ? 0 : M_str[++M_pos]; }
char
eat_current(void)
{ return (M_pos > M_maxpos) ? 0 : M_str[M_pos++]; }
void
store(int& saved_pos)
{ saved_pos = M_pos; }
void
restore(int saved_pos)
{ M_pos = saved_pos; M_result = true; }
void
add_substitution(int start_pos,
substitution_nt sub_type,
int number_of_prefixes);
bool decode_bare_function_type(string_type& output);
bool decode_builtin_type(string_type& output);
bool decode_call_offset(string_type& output);
bool decode_class_enum_type(string_type& output);
bool decode_expression(string_type& output);
bool decode_literal(string_type& output);
bool decode_local_name(string_type& output);
bool decode_name(string_type& output,
string_type& nested_name_qualifiers);
bool decode_nested_name(string_type& output,
string_type& qualifiers);
bool decode_number(string_type& output);
bool decode_operator_name(string_type& output);
bool decode_source_name(string_type& output);
bool decode_substitution(string_type& output,
qualifier_list<Allocator>* qualifiers = NULL);
bool decode_template_args(string_type& output);
bool decode_template_param(string_type& output,
qualifier_list<Allocator>* qualifiers = NULL);
bool decode_unqualified_name(string_type& output);
bool decode_unscoped_name(string_type& output);
bool decode_decimal_integer(string_type& output);
bool decode_special_name(string_type& output);
};
template<typename Allocator>
#if !_GLIBCXX_DEMANGLER_CWDEBUG
inline
#endif
void
session<Allocator>::add_substitution(int start_pos,
substitution_nt sub_type,
int number_of_prefixes = 0)
{
if (!M_inside_substitution)
{
#if _GLIBCXX_DEMANGLER_CWDEBUG
if (M_inside_add_substitution)
return;
#endif
M_substitutions_pos.
push_back(substitution_st(start_pos,
sub_type, number_of_prefixes));
#if _GLIBCXX_DEMANGLER_CWDEBUG
if (!DEBUGCHANNELS::dc::demangler.is_on())
return;
string_type substitution_name("S");
int n = M_substitutions_pos.size() - 1;
if (n > 0)
substitution_name += (n <= 10) ? (char)(n + '0' - 1)
: (char)(n + 'A' - 11);
substitution_name += '_';
string_type subst;
int saved_pos = M_pos;
M_pos = start_pos;
M_inside_add_substitution = true;
_GLIBCXX_DEMANGLER_DEBUG( dc::demangler.off() );
switch(sub_type)
{
case type:
decode_type(subst);
break;
case template_template_param:
decode_template_param(subst);
break;
case nested_name_prefix:
case nested_name_template_prefix:
for (int cnt = number_of_prefixes; cnt > 0; --cnt)
{
if (current() == 'I')
{
subst += ' ';
decode_template_args(subst);
}
else
{
if (cnt < number_of_prefixes)
subst += "::";
if (current() == 'S')
decode_substitution(subst);
else
decode_unqualified_name(subst);
}
}
break;
case unscoped_template_name:
decode_unscoped_name(subst);
break;
}
M_pos = saved_pos;
_GLIBCXX_DEMANGLER_DEBUG( dc::demangler.on() );
_GLIBCXX_DEMANGLER_DOUT(dc::demangler,
"Adding substitution " << substitution_name
<< " : " << subst
<< " (from " << location_ct((char*)__builtin_return_address(0)
+ builtin_return_address_offset)
<< " <- " << location_ct((char*)__builtin_return_address(1)
+ builtin_return_address_offset)
<< " <- " << location_ct((char*)__builtin_return_address(2)
+ builtin_return_address_offset)
<< ").");
M_inside_add_substitution = false;
#endif
}
}
// We don't want to depend on locale (or include <cctype> for that matter).
// We also don't want to use "safe-ctype.h" because that headerfile is not
// available to the users.
inline bool isdigit(char c) { return c >= '0' && c <= '9'; }
inline bool islower(char c) { return c >= 'a' && c <= 'z'; }
inline bool isupper(char c) { return c >= 'A' && c <= 'Z'; }
inline char tolower(char c) { return isupper(c) ? c - 'A' + 'a' : c; }
//
// <decimal-integer> ::= 0
// ::= 1|2|3|4|5|6|7|8|9 [<digit>+]
// <digit> ::= 0|1|2|3|4|5|6|7|8|9
//
template<typename Allocator>
bool
session<Allocator>::decode_decimal_integer(string_type& output)
{
char c = current();
if (c == '0')
{
output += '0';
eat_current();
}
else if (!isdigit(c))
M_result = false;
else
{
do
{
output += c;
}
while (isdigit((c = next())));
}
return M_result;
}
// <number> ::= [n] <decimal-integer>
//
template<typename Allocator>
bool
session<Allocator>::decode_number(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_number");
if (current() != 'n')
decode_decimal_integer(output);
else
{
output += '-';
eat_current();
decode_decimal_integer(output);
}
_GLIBCXX_DEMANGLER_RETURN;
}
// <builtin-type> ::= v # void
// ::= w # wchar_t
// ::= b # bool
// ::= c # char
// ::= a # signed char
// ::= h # unsigned char
// ::= s # short
// ::= t # unsigned short
// ::= i # int
// ::= j # unsigned int
// ::= l # long
// ::= m # unsigned long
// ::= x # long long, __int64
// ::= y # unsigned long long, __int64
// ::= n # __int128
// ::= o # unsigned __int128
// ::= f # float
// ::= d # double
// ::= e # long double, __float80
// ::= g # __float128
// ::= z # ellipsis
// ::= u <source-name> # vendor extended type
//
char const* const builtin_type_c[26] =
{
"signed char", // a
"bool", // b
"char", // c
"double", // d
"long double", // e
"float", // f
"__float128", // g
"unsigned char", // h
"int", // i
"unsigned int", // j
NULL, // k
"long", // l
"unsigned long", // m
"__int128", // n
"unsigned __int128", // o
NULL, // p
NULL, // q
NULL, // r
"short", // s
"unsigned short", // t
NULL, // u
"void", // v
"wchar_t", // w
"long long", // x
"unsigned long long", // y
"..." // z
};
//
template<typename Allocator>
bool
session<Allocator>::decode_builtin_type(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_builtin_type");
char const* bt;
if (!islower(current()) || !(bt = builtin_type_c[current() - 'a']))
_GLIBCXX_DEMANGLER_FAILURE;
output += bt;
eat_current();
_GLIBCXX_DEMANGLER_RETURN;
}
// <class-enum-type> ::= <name>
//
template<typename Allocator>
bool
session<Allocator>::decode_class_enum_type(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_class_enum_type");
string_type nested_name_qualifiers;
if (!decode_name(output, nested_name_qualifiers))
_GLIBCXX_DEMANGLER_FAILURE;
output += nested_name_qualifiers;
_GLIBCXX_DEMANGLER_RETURN;
}
// <substitution> ::=
// S <seq-id> _
// S_
// St # ::std::
// Sa # ::std::allocator
// Sb # ::std::basic_string
// Ss # ::std::basic_string<char, std::char_traits<char>,
// std::allocator<char> >
// Si # ::std::basic_istream<char, std::char_traits<char> >
// So # ::std::basic_ostream<char, std::char_traits<char> >
// Sd # ::std::basic_iostream<char, std::char_traits<char> >
//
// <seq-id> ::=
// 0|1|2|3|4|5|6|7|8|9|A|B|C|D|E|F|G|H|I|J|K|L|M|N|O|P|Q|R|S|T|U|V|W|X|Y|Z
// [<seq-id>] # Base 36 number
//
template<typename Allocator>
bool
session<Allocator>::decode_substitution(string_type& output,
qualifier_list<Allocator>* qualifiers)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_substitution");
unsigned int value = 0;
char c = next();
if (c != '_')
{
switch(c)
{
case 'a':
{
output += "std::allocator";
if (!M_inside_template_args)
{
M_function_name = "allocator";
M_name_is_template = true;
M_name_is_cdtor = false;
M_name_is_conversion_operator = false;
}
eat_current();
if (qualifiers)
qualifiers->printing_suppressed();
_GLIBCXX_DEMANGLER_RETURN;
}
case 'b':
{
output += "std::basic_string";
if (!M_inside_template_args)
{
M_function_name = "basic_string";
M_name_is_template = true;
M_name_is_cdtor = false;
M_name_is_conversion_operator = false;
}
eat_current();
if (qualifiers)
qualifiers->printing_suppressed();
_GLIBCXX_DEMANGLER_RETURN;
}
case 'd':
output += "std::iostream";
if (!M_inside_template_args)
{
M_function_name = "iostream";
M_name_is_template = true;
M_name_is_cdtor = false;
M_name_is_conversion_operator = false;
}
eat_current();
if (qualifiers)
qualifiers->printing_suppressed();
_GLIBCXX_DEMANGLER_RETURN;
case 'i':
output += "std::istream";
if (!M_inside_template_args)
{
M_function_name = "istream";
M_name_is_template = true;
M_name_is_cdtor = false;
M_name_is_conversion_operator = false;
}
eat_current();
if (qualifiers)
qualifiers->printing_suppressed();
_GLIBCXX_DEMANGLER_RETURN;
case 'o':
output += "std::ostream";
if (!M_inside_template_args)
{
M_function_name = "ostream";
M_name_is_template = true;
M_name_is_cdtor = false;
M_name_is_conversion_operator = false;
}
eat_current();
if (qualifiers)
qualifiers->printing_suppressed();
_GLIBCXX_DEMANGLER_RETURN;
case 's':
output += "std::string";
if (!M_inside_template_args)
{
M_function_name = "string";
M_name_is_template = true;
M_name_is_cdtor = false;
M_name_is_conversion_operator = false;
}
eat_current();
if (qualifiers)
qualifiers->printing_suppressed();
_GLIBCXX_DEMANGLER_RETURN;
case 't':
output += "std";
eat_current();
if (qualifiers)
qualifiers->printing_suppressed();
_GLIBCXX_DEMANGLER_RETURN;
default:
for(;; c = next())
{
if (isdigit(c))
value = value * 36 + c - '0';
else if (isupper(c))
value = value * 36 + c - 'A' + 10;
else if (c == '_')
break;
else
_GLIBCXX_DEMANGLER_FAILURE;
}
++value;
break;
}
}
eat_current();
if (value >= M_substitutions_pos.size() ||
M_inside_type > 20) // Rather than core dump.
_GLIBCXX_DEMANGLER_FAILURE;
++M_inside_substitution;
int saved_pos = M_pos;
substitution_st& substitution(M_substitutions_pos[value]);
M_pos = substitution.M_start_pos;
switch(substitution.M_type)
{
case type:
decode_type(output, qualifiers);
break;
case template_template_param:
decode_template_param(output, qualifiers);
break;
case nested_name_prefix:
case nested_name_template_prefix:
for (int cnt = substitution.M_number_of_prefixes; cnt > 0; --cnt)
{
if (current() == 'I')
{
if (M_template_args_need_space)
output += ' ';
M_template_args_need_space = false;
if (!decode_template_args(output))
_GLIBCXX_DEMANGLER_FAILURE;
}
else
{
if (cnt < substitution.M_number_of_prefixes)
output += "::";
if (current() == 'S')
{
if (!decode_substitution(output))
_GLIBCXX_DEMANGLER_FAILURE;
}
else if (!decode_unqualified_name(output))
_GLIBCXX_DEMANGLER_FAILURE;
}
}
if (qualifiers)
qualifiers->printing_suppressed();
break;
case unscoped_template_name:
decode_unscoped_name(output);
if (qualifiers)
qualifiers->printing_suppressed();
break;
}
M_pos = saved_pos;
--M_inside_substitution;
_GLIBCXX_DEMANGLER_RETURN;
}
// <template-param> ::= T_ # first template parameter
// ::= T <parameter-2 non-negative number> _
//
template<typename Allocator>
bool
session<Allocator>::decode_template_param(string_type& output,
qualifier_list<Allocator>* qualifiers)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_template_parameter");
if (current() != 'T')
_GLIBCXX_DEMANGLER_FAILURE;
unsigned int value = 0;
char c;
if ((c = next()) != '_')
{
while(isdigit(c))
{
value = value * 10 + c - '0';
c = next();
}
++value;
}
if (eat_current() != '_')
_GLIBCXX_DEMANGLER_FAILURE;
value += M_template_arg_pos_offset;
if (value >= M_template_arg_pos.size())
_GLIBCXX_DEMANGLER_FAILURE;
int saved_pos = M_pos;
M_pos = M_template_arg_pos[value];
if (M_inside_type > 20) // Rather than core dump.
_GLIBCXX_DEMANGLER_FAILURE;
++M_inside_substitution;
if (current() == 'X')
{
eat_current();
decode_expression(output);
}
else if (current() == 'L')
decode_literal(output);
else
decode_type(output, qualifiers);
--M_inside_substitution;
M_pos = saved_pos;
_GLIBCXX_DEMANGLER_RETURN;
}
template<typename Allocator>
bool
session<Allocator>::decode_literal(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_literal");
eat_current(); // Eat the 'L'.
if (current() == '_')
{
if (next() != 'Z')
_GLIBCXX_DEMANGLER_FAILURE;
eat_current();
if ((M_pos += decode_encoding(output, M_str + M_pos,
M_maxpos - M_pos + 1)) < 0)
_GLIBCXX_DEMANGLER_FAILURE;
}
else
{
// Special cases
if (current() == 'b')
{
if (next() == '0')
output += "false";
else
output += "true";
eat_current();
_GLIBCXX_DEMANGLER_RETURN;
}
char c = current();
#ifdef _GLIBCXX_DEMANGLER_STYLE_LITERAL
if (c == 'i' || c == 'j' || c == 'l' ||
c == 'm' || c == 'x' || c == 'y')
eat_current();
else
#else
#ifndef _GLIBCXX_DEMANGLER_STYLE_LITERAL_INT
if (c == 'i')
eat_current();
else
#endif
#endif
{
output += '(';
if (!decode_type(output))
_GLIBCXX_DEMANGLER_FAILURE;
output += ')';
}
if (!decode_number(output))
_GLIBCXX_DEMANGLER_FAILURE;
#ifdef _GLIBCXX_DEMANGLER_STYLE_LITERAL
if (c == 'j' || c == 'm' || c == 'y')
output += 'u';
if (c == 'l' || c == 'm')
output += 'l';
if (c == 'x' || c == 'y')
output += "ll";
#endif
}
_GLIBCXX_DEMANGLER_RETURN;
}
// <operator-name> ::=
// nw # new
// na # new[]
// dl # delete
// da # delete[]
// ng # - (unary)
// ad # & (unary)
// de # * (unary)
// co # ~
// pl # +
// mi # -
// ml # *
// dv # /
// rm # %
// an # &
// or # |
// eo # ^
// aS # =
// pL # +=
// mI # -=
// mL # *=
// dV # /=
// rM # %=
// aN # &=
// oR # |=
// eO # ^=
// ls # <<
// rs # >>
// lS # <<=
// rS # >>=
// eq # ==
// ne # !=
// lt # <
// gt # >
// le # <=
// ge # >=
// nt # !
// aa # &&
// oo # ||
// pp # ++
// mm # --
// cm # ,
// pm # ->*
// pt # ->
// cl # ()
// ix # []
// qu # ?
// sz # sizeof
// sr # scope resolution (::), see below
// cv <type> # (cast)
// v <digit> <source-name> # vendor extended operator
//
//
// Symbol operator codes exist of two characters, we need to find a
// quick hash so that their names can be looked up in a table.
//
// The puzzle :)
// Shift the rows so that there is at most one character per column.
//
// A perfect solution:
// horizontal
// ..................................... offset + 'a'
// a, ||a||d|||||||||n||||s|||||||||||||||||| 2
// c, || || ||lm|o||| |||| |||||||||||||||||| -3
// d, || a| |e | ||l |||| |||v|||||||||||||| 3
// e, || | | o q| |||| ||| |||||||||||||| -4
// g, |e | | | t||| ||| |||||||||||||| -3
// i, | | | | ||| ||| ||||||||||x||| 12
// l, | | | e ||| ||| ||st|||||| ||| 9
// m, | | | ||| ||| |i lm|||| ||| 18
// n, a e g ||t |w| | |||| ||| 0
// o, || | | | ||o| r|| 19
// p, lm p | t || | || 6
// q, | || u || 14
// r, | |m |s 20
// s, r z | 6
// .....................................
// ^ ^__ second character
// |___ first character
//
// Putting that solution in tables:
char const offset_table_c [1 + CHAR_MAX - CHAR_MIN ] =
{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#if (CHAR_MIN < 0)
// Add -CHAR_MIN extra zeroes (128):
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
// a b c d e f g h i j k
0, -95, 0,-100, -94,-101, 0,-100, 0, -85, 0, 0,
// l m n o p q r s t u v
-88, -79, -97, -78, -91, -83, -77, -91, 0, 0, 0,
#else
// a b c d e f g h i j k
0, 161, 0, 156, 162, 155, 0, 156, 0, 171, 0, 0,
// l m n o p q r s t u v
168, 177, 159, 178, 165, 173, 179, 165, 0, 0, 0,
#endif
// ... more zeros
};
struct entry_st
{
char const* opcode;
char const* symbol_name;
bool unary;
};
entry_st const symbol_name_table_c[39] = {
{ "na", "operator new[]", true },
{ "ge", "operator>=", false },
{ "aa", "operator&&", false },
{ "da", "operator delete[]", true },
{ "ne", "operator!=", false },
{ "ad", "operator&", true }, // unary
{ "ng", "operator-", true }, // unary
{ "de", "operator*", true }, // unary
{ "cl", "operator()", true },
{ "cm", "operator,", false },
{ "eo=", "operator^", false },
{ "co", "operator~", false },
{ "eq", "operator==", false },
{ "le", "operator<=", false },
{ "dl", "operator delete", true },
{ "an=", "operator&", false },
{ "gt", "operator>", false },
{ "pl=", "operator+", false },
{ "pm", "operator->*", false },
{ "nt", "operator!", true },
{ "as=", "operator", false },
{ "pp", "operator++", true },
{ "nw", "operator new", true },
{ "sr", "::", true },
{ "dv=", "operator/", false },
{ "pt", "operator->", false },
{ "mi=", "operator-", false },
{ "ls=", "operator<<", false },
{ "lt", "operator<", false },
{ "ml=", "operator*", false },
{ "mm", "operator--", true },
{ "sz", "sizeof", true },
{ "rm=", "operator%", false },
{ "oo", "operator||", false },
{ "qu", "operator?", false },
{ "ix", "operator[]", true },
{ "or=", "operator|", false },
{ "", NULL, false },
{ "rs=", "operator>>", false }
};
template<typename Allocator>
bool
session<Allocator>::decode_operator_name(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_operator_name");
char opcode0 = current();
char opcode1 = tolower(next());
register char hash;
if ((hash = offset_table_c[opcode0 - CHAR_MIN]))
{
hash += opcode1;
if (
#if (CHAR_MIN < 0)
hash >= 0 &&
#endif
hash < 39)
{
int index = static_cast<int>(static_cast<unsigned char>(hash));
entry_st entry = symbol_name_table_c[index];
if (entry.opcode[0] == opcode0 && entry.opcode[1] == opcode1
&& (opcode1 == current() || entry.opcode[2] == '='))
{
output += entry.symbol_name;
if (opcode1 != current())
output += '=';
eat_current();
if (hash == 27 || hash == 28)
M_template_args_need_space = true;
_GLIBCXX_DEMANGLER_RETURN;
}
else if (opcode0 == 'c' && opcode1 == 'v')
{
eat_current();
output += "operator ";
if (current() == 'T')
{
// This is a templated cast operator.
// It must be of the form "cvT_I...E".
// Let M_template_arg_pos already point
// to the template argument.
M_template_arg_pos_offset = M_template_arg_pos.size();
M_template_arg_pos.push_back(M_pos + 3);
}
if (!decode_type(output))
_GLIBCXX_DEMANGLER_FAILURE;
if (!M_inside_template_args)
M_name_is_conversion_operator = true;
_GLIBCXX_DEMANGLER_RETURN;
}
}
}
_GLIBCXX_DEMANGLER_FAILURE;
}
//
// <expression> ::= <unary operator-name> <expression>
// ::= <binary operator-name> <expression> <expression>
// ::= <expr-primary>
//
// <expr-primary> ::= <template-param> # Starts with a T
// ::= L <type> <value number> E # literal
// ::= L <mangled-name> E # external name
//
template<typename Allocator>
bool
session<Allocator>::decode_expression(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_expression");
if (current() == 'T')
{
if (!decode_template_param(output))
_GLIBCXX_DEMANGLER_FAILURE;
_GLIBCXX_DEMANGLER_RETURN;
}
else if (current() == 'L')
{
if (!decode_literal(output))
_GLIBCXX_DEMANGLER_FAILURE;
if (current() != 'E')
_GLIBCXX_DEMANGLER_FAILURE;
eat_current();
_GLIBCXX_DEMANGLER_RETURN;
}
else
{
char opcode0 = current();
char opcode1 = tolower(next());
register char hash;
if ((hash = offset_table_c[opcode0 - CHAR_MIN]))
{
hash += opcode1;
if (
#if (CHAR_MIN < 0)
hash >= 0 &&
#endif
hash < 39)
{
int index = static_cast<int>(static_cast<unsigned char>(hash));
entry_st entry = symbol_name_table_c[index];
if (entry.opcode[0] == opcode0 && entry.opcode[1] == opcode1
&& (opcode1 == current() || entry.opcode[2] == '='))
{
char const* p = entry.symbol_name;
if (!strncmp("operator", p, 8))
p += 8;
if (*p == ' ')
++p;
if (entry.unary)
output += p;
bool is_eq = (opcode1 != current());
eat_current();
output += '(';
if (!decode_expression(output))
_GLIBCXX_DEMANGLER_FAILURE;
output += ')';
if (!entry.unary)
{
output += ' ';
output += p;
if (is_eq)
output += '=';
output += ' ';
output += '(';
if (!decode_expression(output))
_GLIBCXX_DEMANGLER_FAILURE;
output += ')';
}
_GLIBCXX_DEMANGLER_RETURN;
}
}
}
}
_GLIBCXX_DEMANGLER_FAILURE;
}
//
// <template-args> ::= I <template-arg>+ E
// <template-arg> ::= <type> # type or template
// ::= L <type> <value number> E # literal
// ::= L_Z <encoding> E # external name
// ::= X <expression> E # expression
template<typename Allocator>
bool
session<Allocator>::decode_template_args(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_template_args");
if (eat_current() != 'I')
_GLIBCXX_DEMANGLER_FAILURE;
int prev_size = M_template_arg_pos.size();
++M_inside_template_args;
if (M_template_args_need_space)
{
output += ' ';
M_template_args_need_space = false;
}
output += '<';
for(;;)
{
if (M_inside_template_args == 1 && !M_inside_type)
M_template_arg_pos.push_back(M_pos);
if (current() == 'X')
{
eat_current();
if (!decode_expression(output))
_GLIBCXX_DEMANGLER_FAILURE;
if (current() != 'E')
_GLIBCXX_DEMANGLER_FAILURE;
eat_current();
}
else if (current() == 'L')
{
if (!decode_literal(output))
_GLIBCXX_DEMANGLER_FAILURE;
if (current() != 'E')
_GLIBCXX_DEMANGLER_FAILURE;
eat_current();
}
else if (!decode_type(output))
_GLIBCXX_DEMANGLER_FAILURE;
if (current() == 'E')
break;
output += ", ";
}
eat_current();
if (*(output.rbegin()) == '>')
output += ' ';
output += '>';
--M_inside_template_args;
if (!M_inside_template_args && !M_inside_type)
{
M_name_is_template = true;
M_template_arg_pos_offset = prev_size;
}
_GLIBCXX_DEMANGLER_RETURN;
}
// <bare-function-type> ::=
// <signature type>+ # types are parameter types
//
template<typename Allocator>
bool
session<Allocator>::decode_bare_function_type(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_bare_function_type");
if (M_saw_destructor)
{
if (eat_current() != 'v' || (current() != 'E' && current() != 0))
_GLIBCXX_DEMANGLER_FAILURE;
output += "()";
M_saw_destructor = false;
_GLIBCXX_DEMANGLER_RETURN;
}
#ifndef _GLIBCXX_DEMANGLER_STYLE_VOID
if (current() == 'v')
{
eat_current();
if (current() != 'E' && current() != 0)
_GLIBCXX_DEMANGLER_FAILURE;
output += "()";
M_saw_destructor = false;
_GLIBCXX_DEMANGLER_RETURN;
}
#endif
output += '(';
M_template_args_need_space = false;
if (!decode_type(output)) // Must have at least one parameter.
_GLIBCXX_DEMANGLER_FAILURE;
while (current() != 'E' && current() != 0)
{
output += ", ";
if (!decode_type(output))
_GLIBCXX_DEMANGLER_FAILURE;
}
output += ')';
_GLIBCXX_DEMANGLER_RETURN;
}
// <type> ::=
// <builtin-type> # Starts with a lower case character != r.
// <function-type> # Starts with F
// <class-enum-type> # Starts with N, S, C, D, Z, a digit or a lower
// # case character. Since a lower case character
// # would be an operator name, that would be an
// # error. The S is a substitution or St
// # (::std::). A 'C' would be a constructor and
// # thus also an error.
// <template-param> # Starts with T
// <substitution> # Starts with S
// <template-template-param> <template-args> # Starts with T or S,
// # equivalent with the above.
//
// <array-type> # Starts with A
// <pointer-to-member-type> # Starts with M
// <CV-qualifiers> <type> # Starts with r, V or K
// P <type> # pointer-to # Starts with P
// R <type> # reference-to # Starts with R
// C <type> # complex (C 2000) # Starts with C
// G <type> # imaginary (C 2000)# Starts with G
// U <source-name> <type> # vendor extended type qualifier,
// # starts with U
//
// <template-template-param> ::= <template-param>
// ::= <substitution>
// My own analysis of how to decode qualifiers:
//
// F is a <function-type>, <T> is a <builtin-type>, <class-enum-type>,
// <template-param> or <template-template-param> <template-args>.
// <Q> represents a series of qualifiers (not G or C).
// <C> is an unqualified type.
// <R> is a qualified type.
// <B> is the bare-function-type without return type.
// <I> is the array index.
// Substitutions:
// <Q>M<C><Q2>F<R><B>E ==> R (C::*Q)B Q2 "<C>", "F<R><B>E"
// (<R> and <B> recursive),
// "M<C><Q2>F<R><B>E".
// <Q>F<R><B>E ==> R (Q)B "<R>", "<B>" (<B> recursive)
// and "F<R><B>E".
//
// Note that if <R> has postfix qualifiers (an array), then those
// are added AFTER the (member) function type. For example:
// <Q>FPA<R><B>E ==> R (*(Q)B) [], where the PA added the prefix
// "(*" and the postfix ") []".
//
// <Q>G<T> ==> imaginary T Q "<T>", "G<T>" (<T> recursive).
// <Q>C<T> ==> complex T Q "<T>", "C<T>" (<T> recursive).
// <Q><T> ==> T Q "<T>" (<T> recursive).
//
// where <Q> is any of:
//
// <Q>P ==> *Q "P..."
// <Q>R ==> &Q "R..."
// <Q>[K|V|r]+ ==> [ const| volatile| restrict]+Q "KVr..."
// <Q>U<S> ==> SQ "U<S>..."
// <Q>M<C> ==> C::*Q "M<C>..." (<C> recurs.)
// A<I> ==> [I] "A<I>..." (<I> recurs.)
// <Q>A<I> ==> (Q) [I] "A<I>..." (<I> recurs.)
// Note that when <Q> ends on an A<I2> then the brackets are omitted:
// A<I2>A<I> ==> [I2][I]
//
// A <substitution> is handled with an input position switch during which
// new substitutions are turned off. Because recursive handling of types
// (and therefore the order in which substitutions must be generated) must
// be done left to right, but the generation of Q needs processing right to
// left, substitutions per <type> are generated by reading the input left
// to right and marking the starts of all substitutions only - implicitly
// finishing them at the end of the type. Then the output and real
// substitutions are generated.
//
// The following comment was for the demangling of g++ version 3.0.x. The
// mangling (and I believe even the ABI description) have been fixed now
// (as of g++ version 3.1).
//
// g++ 3.0.x only:
// The ABI specifies for pointer-to-member function types the format
// <Q>M<T>F<R><B>E. In other words, the qualifier <Q2> (see above) is
// implicitely contained in <T> instead of explicitly part of the M format.
// I am convinced that this is a bug in the ABI. Unfortunately, this is
// how we have to demangle things as it has a direct impact on the order
// in which substitutions are stored. This ill-formed design results in
// rather ill-formed demangler code too however :/
//
// <Q2> is now explicitely part of the M format.
// For some weird reason, g++ (3.2.1) does not add substitutions for
// qualified member function pointers. I think that is another bug.
//
template<typename Allocator>
void
qualifier_list<Allocator>::decode_qualifiers(
string_type& prefix,
string_type& postfix,
bool member_function_pointer_qualifiers = false)
{
for(typename std::vector<qualifier<Allocator>, Allocator>::
reverse_iterator iter = M_qualifier_starts.rbegin();
iter != M_qualifier_starts.rend();)
{
if (!member_function_pointer_qualifiers
&& !(*iter).part_of_substitution())
{
int saved_inside_substitution = M_demangler.M_inside_substitution;
M_demangler.M_inside_substitution = 0;
M_demangler.add_substitution((*iter).get_start_pos(), type);
M_demangler.M_inside_substitution = saved_inside_substitution;
}
char qualifier_char = (*iter).first_qualifier();
for(; qualifier_char; qualifier_char = (*iter).next_qualifier())
{
switch(qualifier_char)
{
case 'P':
prefix += "*";
break;
case 'R':
prefix += "&";
break;
case 'K':
prefix += " const";
continue;
case 'V':
prefix += " volatile";
continue;
case 'r':
prefix += " restrict";
continue;
case 'A':
{
string_type index = (*iter).get_optional_type();
if (++iter != M_qualifier_starts.rend()
&& (*iter).first_qualifier() != 'A')
{
prefix += " (";
postfix = ") [" + index + "]" + postfix;
}
else
postfix = "[" + index + "]" + postfix;
break;
}
case 'M':
prefix += " ";
prefix += (*iter).get_optional_type();
prefix += "::*";
break;
case 'U':
prefix += " ";
prefix += (*iter).get_optional_type();
break;
case 'G': // Only here so we added a substitution.
break;
}
break;
}
if (qualifier_char != 'A')
++iter;
}
M_printing_suppressed = false;
}
//
template<typename Allocator>
bool
session<Allocator>::decode_type_with_postfix(
string_type& prefix, string_type& postfix,
qualifier_list<Allocator>* qualifiers)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING2
(qualifiers ? "decode_type" : "decode_type[with qualifiers]");
++M_inside_type;
bool recursive_template_param_or_substitution_call;
if (!(recursive_template_param_or_substitution_call = qualifiers))
qualifiers = new qualifier_list<Allocator>(*this);
// First eat all qualifiers.
bool failure = false;
for(;;) // So we can use 'continue' to eat the next qualifier.
{
int start_pos = M_pos;
switch(current())
{
case 'P':
qualifiers->add_qualifier_start(pointer, start_pos,
M_inside_substitution);
eat_current();
continue;
case 'R':
qualifiers->add_qualifier_start(reference, start_pos,
M_inside_substitution);
eat_current();
continue;
case 'K':
case 'V':
case 'r':
{
char c;
int count = 0;
do
{
++count;
c = next();
}
while(c == 'K' || c == 'V' || c == 'r');
qualifiers->add_qualifier_start(cv_qualifier, start_pos, count,
M_inside_substitution);
continue;
}
case 'U':
{
eat_current();
string_type source_name;
if (!decode_source_name(source_name))
{
failure = true;
break;
}
qualifiers->add_qualifier_start(vendor_extension, start_pos,
source_name, M_inside_substitution);
continue;
}
case 'A':
{
// <array-type> ::= A <positive dimension number> _ <element type>
// ::= A [<dimension expression>] _ <element type>
//
string_type index;
int saved_pos;
store(saved_pos);
if (next() == 'n' || !decode_number(index))
{
restore(saved_pos);
if (next() != '_' && !decode_expression(index))
{
failure = true;
break;
}
}
if (eat_current() != '_')
{
failure = true;
break;
}
qualifiers->add_qualifier_start(array, start_pos, index,
M_inside_substitution);
continue;
}
case 'M':
{
// <Q>M<C> or <Q>M<C><Q2>F<R><B>E
eat_current();
string_type class_type;
if (!decode_type(class_type)) // Substitution: "<C>".
{
failure = true;
break;
}
char c = current();
if (c == 'F' || c == 'K' || c == 'V' || c == 'r')
// Must be CV-qualifiers and a member function pointer.
{
// <Q>M<C><Q2>F<R><B>E ==> R (C::*Q)B Q2
// substitutions: "<C>", "F<R><B>E" (<R> and <B>
// recursive), "M<C><Q2>F<R><B>E".
int count = 0;
int Q2_start_pos = M_pos;
while(c == 'K' || c == 'V' || c == 'r') // Decode <Q2>.
{
++count;
c = next();
}
qualifier_list<Allocator> class_type_qualifiers(*this);
if (count)
class_type_qualifiers.
add_qualifier_start(cv_qualifier, Q2_start_pos,
count, M_inside_substitution);
string_type member_function_qualifiers;
// It is unclear why g++ doesn't add a substitution for
// "<Q2>F<R><B>E" as it should I think.
string_type member_function_qualifiers_postfix;
class_type_qualifiers.
decode_qualifiers(member_function_qualifiers,
member_function_qualifiers_postfix, true);
member_function_qualifiers +=
member_function_qualifiers_postfix;
// I don't think this substitution is actually ever used.
int function_pos = M_pos;
if (eat_current() != 'F')
{
failure = true;
break;
}
// Return type.
// Constructors, destructors and conversion operators don't
// have a return type, but seem to never get here.
if (!decode_type_with_postfix(prefix, postfix))
// substitution: <R> recursive
{
failure = true;
break;
}
prefix += " (";
prefix += class_type;
prefix += "::*";
string_type bare_function_type;
if (!decode_bare_function_type(bare_function_type)
|| eat_current() != 'E') // Substitution: <B> recursive.
{
failure = true;
break;
}
// substitution: "F<R><B>E".
add_substitution(function_pos, type);
// substitution: "M<C><Q2>F<R><B>E".
add_substitution(start_pos, type);
// substitution: all qualified types if any.
qualifiers->decode_qualifiers(prefix, postfix);
prefix += ")";
prefix += bare_function_type;
prefix += member_function_qualifiers;
goto decode_type_exit;
}
qualifiers->add_qualifier_start(pointer_to_member, start_pos,
class_type, M_inside_substitution);
continue;
}
default:
break;
}
break;
}
if (!failure)
{
// <Q>G<T> ==> imaginary T Q
// substitutions: "<T>", "G<T>" (<T> recursive).
// <Q>C<T> ==> complex T Q
// substitutions: "<T>", "C<T>" (<T> recursive).
if (current() == 'C' || current() == 'G')
{
prefix += current() == 'C' ? "complex " : "imaginary ";
qualifiers->add_qualifier_start(complex_or_imaginary, M_pos,
M_inside_substitution);
eat_current();
}
int start_pos = M_pos;
switch(current())
{
case 'F':
{
// <Q>F<R><B>E ==> R (Q)B
// substitution: "<R>", "<B>" (<B> recursive) and "F<R><B>E".
eat_current();
// Return type.
if (!decode_type_with_postfix(prefix, postfix))
// Substitution: "<R>".
{
failure = true;
break;
}
// Only array (pointer) types have a postfix.
// In that case we don't want the space but
// expect something like prefix is "int (*"
// and postfix is ") [1]".
if (postfix.size() == 0)
prefix += ' ';
prefix += '(';
string_type bare_function_type;
if (!decode_bare_function_type(bare_function_type)
// substitution: "<B>" (<B> recursive).
|| eat_current() != 'E')
{
failure = true;
break;
}
add_substitution(start_pos, type); // Substitution: "F<R><B>E".
qualifiers->decode_qualifiers(prefix, postfix);
// substitution: all qualified types, if any.
prefix += ")";
prefix += bare_function_type;
break;
}
case 'T':
if (!decode_template_param(prefix, qualifiers))
{
failure = true;
break;
}
if (current() == 'I')
{
add_substitution(start_pos, template_template_param);
// substitution: "<template-template-param>".
if (!decode_template_args(prefix))
{
failure = true;
break;
}
}
if (!recursive_template_param_or_substitution_call
&& qualifiers->suppressed())
{
add_substitution(start_pos, type);
// substitution: "<template-param>" or
// "<template-template-param> <template-args>".
qualifiers->decode_qualifiers(prefix, postfix);
// substitution: all qualified types, if any.
}
break;
case 'S':
if (M_pos >= M_maxpos)
{
failure = true;
break;
}
if (M_str[M_pos + 1] != 't')
{
if (!decode_substitution(prefix, qualifiers))
{
failure = true;
break;
}
if (current() == 'I')
{
if (!decode_template_args(prefix))
{
failure = true;
break;
}
if (!recursive_template_param_or_substitution_call
&& qualifiers->suppressed())
add_substitution(start_pos, type);
// Substitution:
// "<template-template-param> <template-args>".
}
if (!recursive_template_param_or_substitution_call
&& qualifiers->suppressed())
qualifiers->decode_qualifiers(prefix, postfix);
// Substitution: all qualified types, if any.
break;
}
/* Fall-through for St */
case 'N':
case 'Z':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
// <Q><T> ==> T Q
// substitutions: "<T>" (<T> recursive).
if (!decode_class_enum_type(prefix))
{
failure = true;
break;
}
if (!recursive_template_param_or_substitution_call)
{
add_substitution(start_pos, type);
// substitution: "<class-enum-type>".
qualifiers->decode_qualifiers(prefix, postfix);
// substitution: all qualified types, if any.
}
else
qualifiers->printing_suppressed();
break;
default:
// <Q><T> ==> T Q
// substitutions: "<T>" (<T> recursive).
if (!decode_builtin_type(prefix))
{
failure = true;
break;
}
// If decode_type was called from decode_template_param then we
// need to suppress calling qualifiers here in order to get a
// substitution added anyway (for the <template-param>).
if (!recursive_template_param_or_substitution_call)
qualifiers->decode_qualifiers(prefix, postfix);
else
qualifiers->printing_suppressed();
break;
}
}
decode_type_exit:
--M_inside_type;
if (!recursive_template_param_or_substitution_call)
delete qualifiers;
if (failure)
_GLIBCXX_DEMANGLER_FAILURE;
_GLIBCXX_DEMANGLER_RETURN2;
}
// <nested-name> ::= N [<CV-qualifiers>] <prefix> <unqualified-name> E
// ::= N [<CV-qualifiers>] <template-prefix> <template-args> E
//
// <prefix> ::= <prefix> <unqualified-name>
// ::= <template-prefix> <template-args>
// ::= # empty
// ::= <substitution>
//
// <template-prefix> ::= <prefix> <template unqualified-name>
// ::= <substitution>
//
template<typename Allocator>
bool
session<Allocator>::decode_nested_name(string_type& output,
string_type& qualifiers)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_nested_name");
if (current() != 'N' || M_pos >= M_maxpos)
_GLIBCXX_DEMANGLER_FAILURE;
// <CV-qualifiers> ::= [r] [V] [K] # restrict (C99), volatile, const
char const* qualifiers_start = &M_str[M_pos + 1];
for (char c = next(); c == 'K' || c == 'V' || c == 'r'; c = next());
for (char const* qualifier_ptr = &M_str[M_pos - 1];
qualifier_ptr >= qualifiers_start; --qualifier_ptr)
switch(*qualifier_ptr)
{
case 'K':
qualifiers += " const";
break;
case 'V':
qualifiers += " volatile";
break;
case 'r':
qualifiers += " restrict";
break;
}
int number_of_prefixes = 0;
int substitution_start = M_pos;
for(;;)
{
++number_of_prefixes;
if (current() == 'S')
{
if (!decode_substitution(output))
_GLIBCXX_DEMANGLER_FAILURE;
}
else if (current() == 'I')
{
if (!decode_template_args(output))
_GLIBCXX_DEMANGLER_FAILURE;
if (current() != 'E')
{
// substitution: "<template-prefix> <template-args>".
add_substitution(substitution_start, nested_name_prefix,
number_of_prefixes);
}
}
else
{
if (!decode_unqualified_name(output))
_GLIBCXX_DEMANGLER_FAILURE;
if (current() != 'E')
{
// substitution: "<prefix> <unqualified-name>" or
// "<prefix> <template unqualified-name>".
add_substitution(substitution_start,
(current() == 'I') ? nested_name_template_prefix
: nested_name_prefix,
number_of_prefixes);
}
}
if (current() == 'E')
{
eat_current();
_GLIBCXX_DEMANGLER_RETURN;
}
if (current() != 'I')
output += "::";
else if (M_template_args_need_space)
output += ' ';
M_template_args_need_space = false;
}
_GLIBCXX_DEMANGLER_FAILURE;
}
// <local-name> := Z <function encoding> E <entity name> [<discriminator>]
// := Z <function encoding> E s [<discriminator>]
// <discriminator> := _ <non-negative number>
//
template<typename Allocator>
bool
session<Allocator>::decode_local_name(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_local_name");
if (current() != 'Z' || M_pos >= M_maxpos)
_GLIBCXX_DEMANGLER_FAILURE;
if ((M_pos += decode_encoding(output, M_str + M_pos + 1,
M_maxpos - M_pos) + 1) < 0 || eat_current() != 'E')
_GLIBCXX_DEMANGLER_FAILURE;
output += "::";
if (current() == 's')
{
eat_current();
output += "string literal";
}
else
{
string_type nested_name_qualifiers;
if (!decode_name(output, nested_name_qualifiers))
_GLIBCXX_DEMANGLER_FAILURE;
output += nested_name_qualifiers;
}
string_type discriminator;
if (current() == '_' && next() != 'n' && !decode_number(discriminator))
_GLIBCXX_DEMANGLER_FAILURE;
_GLIBCXX_DEMANGLER_RETURN;
}
// <source-name> ::= <positive length number> <identifier>
//
template<typename Allocator>
bool
session<Allocator>::decode_source_name(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_source_name");
int length = current() - '0';
if (length < 1 || length > 9)
_GLIBCXX_DEMANGLER_FAILURE;
while(isdigit(next()))
length = 10 * length + current() - '0';
char const* ptr = &M_str[M_pos];
if (length > 11 && !strncmp(ptr, "_GLOBAL_", 8) && ptr[9] == 'N'
&& ptr[8] == ptr[10])
{
output += "(anonymous namespace)";
if ((M_pos += length) > M_maxpos + 1)
_GLIBCXX_DEMANGLER_FAILURE;
}
else
while(length--)
{
if (current() == 0)
_GLIBCXX_DEMANGLER_FAILURE;
output += eat_current();
}
_GLIBCXX_DEMANGLER_RETURN;
}
// <unqualified-name> ::= <operator-name> # Starts with lower case.
// ::= <ctor-dtor-name> # Starts with 'C' or 'D'.
// ::= <source-name> # Starts with a digit.
//
template<typename Allocator>
bool
session<Allocator>::decode_unqualified_name(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_unqualified_name");
if (isdigit(current()))
{
if (!M_inside_template_args)
{
bool recursive_unqualified_name = (&M_function_name == &output);
// This can be a recursive call when we are decoding
// an <operator-name> that is a cast operator for a some
// <unqualified-name>; for example "operator Foo()".
// In that case this is thus not a ctor or dtor and we
// are not interested in updating M_function_name.
if (!recursive_unqualified_name)
M_function_name.clear();
M_name_is_template = false;
M_name_is_cdtor = false;
M_name_is_conversion_operator = false;
if (!decode_source_name(M_function_name))
_GLIBCXX_DEMANGLER_FAILURE;
if (!recursive_unqualified_name)
output += M_function_name;
}
else if (!decode_source_name(output))
_GLIBCXX_DEMANGLER_FAILURE;
_GLIBCXX_DEMANGLER_RETURN;
}
if (islower(current()))
{
if (!M_inside_template_args)
{
M_function_name.clear();
M_name_is_template = false;
M_name_is_cdtor = false;
M_name_is_conversion_operator = false;
if (!decode_operator_name(M_function_name))
_GLIBCXX_DEMANGLER_FAILURE;
output += M_function_name;
}
_GLIBCXX_DEMANGLER_RETURN;
}
if (current() == 'C' || current() == 'D')
{
if (M_inside_template_args)
_GLIBCXX_DEMANGLER_FAILURE;
// <ctor-dtor-name> ::=
// C1 # complete object (in-charge) constructor
// C2 # base object (not-in-charge) constructor
// C3 # complete object (in-charge) allocating constructor
// D0 # deleting (in-charge) destructor
// D1 # complete object (in-charge) destructor
// D2 # base object (not-in-charge) destructor
//
if (current() == 'C')
{
char c = next();
if (c < '1' || c > '3')
_GLIBCXX_DEMANGLER_FAILURE;
}
else
{
char c = next();
if (c < '0' || c > '2')
_GLIBCXX_DEMANGLER_FAILURE;
output += '~';
M_saw_destructor = true;
}
M_name_is_cdtor = true;
eat_current();
output += M_function_name;
_GLIBCXX_DEMANGLER_RETURN;
}
_GLIBCXX_DEMANGLER_FAILURE;
}
// <unscoped-name> ::=
// <unqualified-name> # Starts not with an 'S'
// St <unqualified-name> # ::std::
//
template<typename Allocator>
bool
session<Allocator>::decode_unscoped_name(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_unscoped_name");
if (current() == 'S')
{
if (next() != 't')
_GLIBCXX_DEMANGLER_FAILURE;
eat_current();
output += "std::";
}
decode_unqualified_name(output);
_GLIBCXX_DEMANGLER_RETURN;
}
// <name> ::=
// <nested-name> # Starts with 'N'
// <unscoped-template-name> <template-args> # idem
// <local-name> # Starts with 'Z'
// <unscoped-name> # Starts with 'S', 'C', 'D',
// # a digit or a lower case
// # character.
//
// <unscoped-template-name> ::= <unscoped-name>
// ::= <substitution>
template<typename Allocator>
bool
session<Allocator>::decode_name(string_type& output,
string_type& nested_name_qualifiers)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_name");
int substitution_start = M_pos;
if (current() == 'S' && (M_pos >= M_maxpos || M_str[M_pos + 1] != 't'))
{
if (!decode_substitution(output))
_GLIBCXX_DEMANGLER_FAILURE;
}
else if (current() == 'N')
{
decode_nested_name(output, nested_name_qualifiers);
_GLIBCXX_DEMANGLER_RETURN;
}
else if (current() == 'Z')
{
decode_local_name(output);
_GLIBCXX_DEMANGLER_RETURN;
}
else if (!decode_unscoped_name(output))
_GLIBCXX_DEMANGLER_FAILURE;
if (current() == 'I')
{
// Must have been an <unscoped-template-name>.
add_substitution(substitution_start, unscoped_template_name);
if (!decode_template_args(output))
_GLIBCXX_DEMANGLER_FAILURE;
}
M_template_args_need_space = false;
_GLIBCXX_DEMANGLER_RETURN;
}
// <call-offset> ::= h <nv-offset> _
// ::= v <v-offset> _
// <nv-offset> ::= <offset number>
// non-virtual base override
//
// <v-offset> ::= <offset number> _ <virtual offset number>
// virtual base override, with vcall offset
template<typename Allocator>
bool
session<Allocator>::decode_call_offset(string_type&
#if _GLIBCXX_DEMANGLER_CWDEBUG
output
#endif
)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_call_offset");
if (current() == 'h')
{
string_type dummy;
eat_current();
if (decode_number(dummy) && current() == '_')
{
eat_current();
_GLIBCXX_DEMANGLER_RETURN;
}
}
else if (current() == 'v')
{
string_type dummy;
eat_current();
if (decode_number(dummy) && current() == '_')
{
eat_current();
if (decode_number(dummy) && current() == '_')
{
eat_current();
_GLIBCXX_DEMANGLER_RETURN;
}
}
}
_GLIBCXX_DEMANGLER_FAILURE;
}
//
// <special-name> ::=
// TV <type> # virtual table
// TT <type> # VTT structure (construction
// vtable index).
// TI <type> # typeinfo structure
// TS <type> # typeinfo name (null-terminated
// byte string).
// GV <object name> # Guard variable for one-time
// initialization of static objects in
// a local scope.
// T <call-offset> <base encoding># base is the nominal target function
// of thunk.
// Tc <call-offset> <call-offset> <base encoding> # base is the nominal
// target function of thunk; first
// call-offset is 'this' adjustment;
// second call-offset is result
// adjustment
//
template<typename Allocator>
bool
session<Allocator>::decode_special_name(string_type& output)
{
_GLIBCXX_DEMANGLER_DOUT_ENTERING("decode_special_name");
if (current() == 'G')
{
if (next() != 'V')
_GLIBCXX_DEMANGLER_FAILURE;
output += "guard variable for ";
string_type nested_name_qualifiers;
eat_current();
if (!decode_name(output, nested_name_qualifiers))
_GLIBCXX_DEMANGLER_FAILURE;
output += nested_name_qualifiers;
_GLIBCXX_DEMANGLER_RETURN;
}
else if (current() != 'T')
_GLIBCXX_DEMANGLER_FAILURE;
switch(next())
{
case 'V':
output += "vtable for ";
eat_current();
decode_type(output);
_GLIBCXX_DEMANGLER_RETURN;
case 'T':
output += "VTT for ";
eat_current();
decode_type(output);
_GLIBCXX_DEMANGLER_RETURN;
case 'I':
output += "typeinfo for ";
eat_current();
decode_type(output);
_GLIBCXX_DEMANGLER_RETURN;
case 'S':
output += "typeinfo name for ";
eat_current();
decode_type(output);
_GLIBCXX_DEMANGLER_RETURN;
case 'c':
output += "covariant return thunk to ";
if (!decode_call_offset(output)
|| !decode_call_offset(output)
|| (M_pos += decode_encoding(output, M_str + M_pos,
M_maxpos - M_pos + 1)) < 0)
_GLIBCXX_DEMANGLER_FAILURE;
_GLIBCXX_DEMANGLER_RETURN;
case 'C': // GNU extension?
{
string_type first;
output += "construction vtable for ";
eat_current();
if (!decode_type(first))
_GLIBCXX_DEMANGLER_FAILURE;
while(isdigit(current()))
eat_current();
if (eat_current() != '_')
_GLIBCXX_DEMANGLER_FAILURE;
if (!decode_type(output))
_GLIBCXX_DEMANGLER_FAILURE;
output += "-in-";
output += first;
_GLIBCXX_DEMANGLER_RETURN;
}
default:
if (current() == 'v')
output += "virtual thunk to ";
else
output += "non-virtual thunk to ";
if (!decode_call_offset(output)
|| (M_pos += decode_encoding(output, M_str + M_pos,
M_maxpos - M_pos + 1)) < 0)
_GLIBCXX_DEMANGLER_FAILURE;
_GLIBCXX_DEMANGLER_RETURN;
}
}
// <encoding> ::=
// <function name> <bare-function-type> # Starts with 'C', 'D', 'N',
// 'S', a digit or a lower case
// character.
// <data name> # Idem.
// <special-name> # Starts with 'T' or 'G'.
template<typename Allocator>
int
session<Allocator>::decode_encoding(string_type& output,
char const* in,
int len)
{
#if _GLIBCXX_DEMANGLER_CWDEBUG
_GLIBCXX_DEMANGLER_DOUT(dc::demangler,
"Output thus far: \"" << output << '"');
string_type input(in, len > 0x40000000 ? strlen(in) : len);
_GLIBCXX_DEMANGLER_DOUT(
dc::demangler, "Entering decode_encoding(\"" << input << "\")");
#endif
if (len <= 0)
return INT_MIN;
session<Allocator> demangler_session(in, len);
string_type nested_name_qualifiers;
int saved_pos;
demangler_session.store(saved_pos);
if (demangler_session.decode_special_name(output))
return demangler_session.M_pos;
demangler_session.restore(saved_pos);
string_type name;
if (!demangler_session.decode_name(name, nested_name_qualifiers))
return INT_MIN;
if (demangler_session.current() == 0
|| demangler_session.current() == 'E')
{
output += name;
output += nested_name_qualifiers;
return demangler_session.M_pos;
}
// Must have been a <function name>.
if (demangler_session.M_name_is_template
&& !(demangler_session.M_name_is_cdtor
|| demangler_session.M_name_is_conversion_operator))
{
if (!demangler_session.decode_type(output))
// Return type of function
return INT_MIN;
output += ' ';
}
output += name;
if (!demangler_session.decode_bare_function_type(output))
return INT_MIN;
output += nested_name_qualifiers;
return demangler_session.M_pos;
}
} // namespace demangler
// Public interface
template<typename Allocator>
struct demangle
{
typedef Allocator allocator_type;
typedef std::basic_string<char, std::char_traits<char>, Allocator>
string_type;
static string_type symbol(char const* in);
static string_type type(char const* in);
};
// demangle::symbol()
//
// Demangle `input' which should be a mangled function name as for
// instance returned by nm(1).
template<typename Allocator>
std::basic_string<char, std::char_traits<char>, Allocator>
demangle<Allocator>::symbol(char const* input)
{
// <mangled-name> ::= _Z <encoding>
// <mangled-name> ::= _GLOBAL_ _<type>_ <disambiguation part>
// <type> can be I or D (GNU extension)
typedef demangler::session<Allocator> demangler_type;
string_type result;
bool failure = (input[0] != '_');
if (!failure)
{
if (input[1] == 'G')
{
if (!strncmp(input, "_GLOBAL__", 9)
&& (input[9] == 'D' || input[9] == 'I')
&& input[10] == '_')
{
if (input[9] == 'D')
result.assign("global destructors keyed to ", 28);
else
result.assign("global constructors keyed to ", 29);
// Output the disambiguation part as-is.
result += input + 11;
}
else
failure = true;
}
else if (input[1] == 'Z')
{
int cnt = demangler_type::decode_encoding(result, input + 2,
INT_MAX);
if (cnt < 0 || input[cnt + 2] != 0)
failure = true;
}
else
failure = true;
}
// Failure to demangle, return the mangled name.
if (failure)
result.assign(input, strlen(input));
return result;
}
// demangle::type()
// Demangle `input' which must be a zero terminated mangled type
// name as for instance returned by std::type_info::name().
template<typename Allocator>
std::basic_string<char, std::char_traits<char>, Allocator>
demangle<Allocator>::type(char const* input)
{
std::basic_string<char, std::char_traits<char>, Allocator> result;
if (input == NULL)
result = "(null)";
else
{
demangler::session<Allocator> demangler_session(input, INT_MAX);
if (!demangler_session.decode_type(result)
|| demangler_session.remaining_input_characters())
{
// Failure to demangle, return the mangled name.
result = input;
}
}
return result;
}
} // namespace __gnu_cxx
#endif // __DEMANGLE_H
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