Greetings, I committed partial backport of r202818, r202832 and r202836 to google/gcc-4_8 branch as r202927.
2013-09-25 Paul Pluzhnikov <ppluzhni...@google.com> * libstdc++-v3/config/abi/pre/gnu.ver: Add _ZSt24__throw_out_of_range_fmtPKcz * libstdc++-v3/src/c++11/Makefile.am: Add snprintf_lite. * libstdc++-v3/src/c++11/Makefile.in: Regenerate. * libstdc++-v3/src/c++11/snprintf_lite.cc: New. * libstdc++-v3/src/c++11/functexcept.cc (__throw_out_of_range_fmt): New. Index: libstdc++-v3/config/abi/pre/gnu.ver =================================================================== --- libstdc++-v3/config/abi/pre/gnu.ver (revision 202926) +++ libstdc++-v3/config/abi/pre/gnu.ver (working copy) @@ -1357,6 +1357,13 @@ } GLIBCXX_3.4.18; +GLIBCXX_3.4.20 { + + # std::__throw_out_of_range_fmt(char const*, ...) + _ZSt24__throw_out_of_range_fmtPKcz; + +} GLIBCXX_3.4.19; + # Symbols in the support library (libsupc++) have their own tag. CXXABI_1.3 { Index: libstdc++-v3/src/c++11/Makefile.am =================================================================== --- libstdc++-v3/src/c++11/Makefile.am (revision 202926) +++ libstdc++-v3/src/c++11/Makefile.am (working copy) @@ -42,6 +42,7 @@ random.cc \ regex.cc \ shared_ptr.cc \ + snprintf_lite.cc \ system_error.cc \ thread.cc Index: libstdc++-v3/src/c++11/functexcept.cc =================================================================== --- libstdc++-v3/src/c++11/functexcept.cc (revision 202926) +++ libstdc++-v3/src/c++11/functexcept.cc (working copy) @@ -31,6 +31,7 @@ #include <future> #include <functional> #include <regex> +#include <stdarg.h> #ifdef _GLIBCXX_USE_NLS # include <libintl.h> @@ -39,6 +40,12 @@ # define _(msgid) (msgid) #endif +namespace __gnu_cxx +{ + int __snprintf_lite(char *__buf, size_t __bufsize, const char *__fmt, + va_list __ap); +} + namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION @@ -80,6 +87,22 @@ { _GLIBCXX_THROW_OR_ABORT(out_of_range(_(__s))); } void + __throw_out_of_range_fmt(const char* __fmt, ...) + { + const size_t __len = __builtin_strlen(__fmt); + // We expect at most 2 numbers, and 1 short string. The additional + // 512 bytes should provide more than enough space for expansion. + const size_t __alloca_size = __len + 512; + char *const __s = static_cast<char*>(__builtin_alloca(__alloca_size)); + va_list __ap; + + va_start(__ap, __fmt); + __gnu_cxx::__snprintf_lite(__s, __alloca_size, __fmt, __ap); + _GLIBCXX_THROW_OR_ABORT(out_of_range(_(__s))); + va_end(__ap); // Not reached. + } + + void __throw_runtime_error(const char* __s __attribute__((unused))) { _GLIBCXX_THROW_OR_ABORT(runtime_error(_(__s))); } Index: libstdc++-v3/src/c++11/Makefile.in =================================================================== --- libstdc++-v3/src/c++11/Makefile.in (revision 202926) +++ libstdc++-v3/src/c++11/Makefile.in (working copy) @@ -70,7 +70,8 @@ am__objects_1 = chrono.lo condition_variable.lo debug.lo \ functexcept.lo functional.lo future.lo hash_c++0x.lo \ hashtable_c++0x.lo limits.lo mutex.lo placeholders.lo \ - random.lo regex.lo shared_ptr.lo system_error.lo thread.lo + random.lo regex.lo shared_ptr.lo snprintf_lite.lo \ + system_error.lo thread.lo @ENABLE_EXTERN_TEMPLATE_TRUE@am__objects_2 = fstream-inst.lo \ @ENABLE_EXTERN_TEMPLATE_TRUE@ string-inst.lo wstring-inst.lo am_libc__11convenience_la_OBJECTS = $(am__objects_1) $(am__objects_2) @@ -319,6 +320,7 @@ random.cc \ regex.cc \ shared_ptr.cc \ + snprintf_lite.cc \ system_error.cc \ thread.cc Index: libstdc++-v3/src/c++11/snprintf_lite.cc =================================================================== --- libstdc++-v3/src/c++11/snprintf_lite.cc (revision 0) +++ libstdc++-v3/src/c++11/snprintf_lite.cc (revision 0) @@ -0,0 +1,159 @@ +// Debugging support -*- C++ -*- + +// Copyright (C) 2013 Free Software Foundation, Inc. +// +// This file is part of GCC. +// +// GCC 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 3, or (at your option) +// any later version. +// +// GCC 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. +// +// Under Section 7 of GPL version 3, you are granted additional +// permissions described in the GCC Runtime Library Exception, version +// 3.1, as published by the Free Software Foundation. + +// You should have received a copy of the GNU General Public License and +// a copy of the GCC Runtime Library Exception along with this program; +// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +// <http://www.gnu.org/licenses/>. + +#include <stdarg.h> +#include <bits/functexcept.h> +#include <bits/locale_facets.h> + +namespace std { + template<typename _CharT, typename _ValueT> + int + __int_to_char(_CharT* __bufend, _ValueT __v, const _CharT* __lit, + ios_base::fmtflags __flags, bool __dec); +} + +namespace __gnu_cxx { + + // Private helper to throw logic error if snprintf_lite runs out + // of space (which is not expected to ever happen). + // NUL-terminates __buf. + void + __throw_insufficient_space(const char *__buf, const char *__bufend) + __attribute__((__noreturn__)); + + void + __throw_insufficient_space(const char *__buf, const char *__bufend) + { + // Include space for trailing NUL. + const size_t __len = __bufend - __buf + 1; + + const char __err[] = "not enough space for format expansion " + "(Please submit full bug report at http://gcc.gnu.org/bugs.html):\n "; + const size_t __errlen = sizeof(__err) - 1; + + char *const __e + = static_cast<char*>(__builtin_alloca(__errlen + __len)); + + __builtin_memcpy(__e, __err, __errlen); + __builtin_memcpy(__e + __errlen, __buf, __len - 1); + __e[__errlen + __len - 1] = '\0'; + std::__throw_logic_error(__e); + } + + + // Private routine to append decimal representation of VAL to the given + // BUFFER, but not more than BUFSIZE characters. + // Does not NUL-terminate the output buffer. + // Returns number of characters appended, or -1 if BUFSIZE is too small. + int __concat_size_t(char *__buf, size_t __bufsize, size_t __val) + { + // __int_to_char is explicitly instantiated and available only for + // some, but not all, types. See locale-inst.cc. +#ifdef _GLIBCXX_USE_LONG_LONG + unsigned long long __val2 = __val; +#else + unsigned long __val2 = __val; +#endif + // Long enough for decimal representation. + int __ilen = 3 * sizeof(__val2); + char *__cs = static_cast<char*>(__builtin_alloca(__ilen)); + size_t __len = std::__int_to_char(__cs + __ilen, __val2, + std::__num_base::_S_atoms_out, + std::ios_base::dec, true); + if (__bufsize < __len) + return -1; + + __builtin_memcpy(__buf, __cs + __ilen - __len, __len); + return __len; + } + + + // Private routine to print into __buf arguments according to format, + // not to exceed __bufsize. + // Only '%%', '%s' and '%zu' format specifiers are understood. + // Returns number of characters printed (excluding terminating NUL). + // Always NUL-terminates __buf. + // Throws logic_error on insufficient space. + int __snprintf_lite(char *__buf, size_t __bufsize, const char *__fmt, + va_list __ap) + { + char *__d = __buf; + const char *__s = __fmt; + const char *const __limit = __d + __bufsize - 1; // Leave space for NUL. + + while (__s[0] != '\0' && __d < __limit) + { + if (__s[0] == '%') + switch (__s[1]) + { + default: // Stray '%'. Just print it. + break; + case '%': // '%%' + __s += 1; + break; + case 's': // '%s'. + { + const char *__v = va_arg(__ap, const char *); + + while (__v[0] != '\0' && __d < __limit) + *__d++ = *__v++; + + if (__v[0] != '\0') + // Not enough space for __fmt expansion. + __throw_insufficient_space(__buf, __d); + + __s += 2; // Step over %s. + continue; + } + break; + case 'z': + if (__s[2] == 'u') // '%zu' -- expand next size_t arg. + { + const int __len = __concat_size_t(__d, __limit - __d, + va_arg(__ap, size_t)); + if (__len > 0) + __d += __len; + else + // Not enough space for __fmt expansion. + __throw_insufficient_space(__buf, __d); + + __s += 3; // Step over %zu + continue; + } + // Stray '%zX'. Just print it. + break; + } + *__d++ = *__s++; + } + + if (__s[0] != '\0') + // Not enough space for __fmt expansion. + __throw_insufficient_space(__buf, __d); + + *__d = '\0'; + return __d - __buf; + } + +} // __gnu_cxx