diff options
Diffstat (limited to 'soong/linux_glibc/signal.h')
| -rw-r--r-- | soong/linux_glibc/signal.h | 248 |
1 files changed, 211 insertions, 37 deletions
diff --git a/soong/linux_glibc/signal.h b/soong/linux_glibc/signal.h index 9f72617..fe385f2 100644 --- a/soong/linux_glibc/signal.h +++ b/soong/linux_glibc/signal.h @@ -1,7 +1,7 @@ /* DO NOT EDIT! GENERATED AUTOMATICALLY! */ /* A GNU-like <signal.h>. - Copyright (C) 2006-2016 Free Software Foundation, Inc. + Copyright (C) 2006-2021 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -14,7 +14,7 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. */ + along with this program. If not, see <https://www.gnu.org/licenses/>. */ #if __GNUC__ >= 3 #pragma GCC system_header @@ -56,18 +56,34 @@ #ifndef _GL_M4_SIGNAL_H #define _GL_M4_SIGNAL_H -/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6, Android - declare pthread_sigmask in <pthread.h>, not in <signal.h>. +/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6, Android, + OS/2 kLIBC declare pthread_sigmask in <pthread.h>, not in <signal.h>. But avoid namespace pollution on glibc systems.*/ -#if (0 || defined GNULIB_POSIXCHECK) \ +#if (IN_M4_GNULIB_TESTS || defined GNULIB_POSIXCHECK) \ && ((defined __APPLE__ && defined __MACH__) \ || defined __FreeBSD__ || defined __OpenBSD__ || defined __osf__ \ - || defined __sun || defined __ANDROID__) \ + || defined __sun || defined __ANDROID__ || defined __KLIBC__) \ && ! defined __GLIBC__ # include <pthread.h> #endif /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ +/* C++ compatible function declaration macros. + Copyright (C) 2010-2021 Free Software Foundation, Inc. + + This program 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 of the License, or + (at your option) any later version. + + This program 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 program. If not, see <https://www.gnu.org/licenses/>. */ + #ifndef _GL_CXXDEFS_H #define _GL_CXXDEFS_H @@ -200,6 +216,16 @@ _GL_EXTERN_C int _gl_cxxalias_dummy #endif +/* _GL_CXXALIAS_MDA (func, rettype, parameters); + is to be used when func is a Microsoft deprecated alias, on native Windows. + It declares a C++ alias called GNULIB_NAMESPACE::func + that redirects to _func, if GNULIB_NAMESPACE is defined. + Example: + _GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...)); + */ +#define _GL_CXXALIAS_MDA(func,rettype,parameters) \ + _GL_CXXALIAS_RPL_1 (func, _##func, rettype, parameters) + /* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters); is like _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters); except that the C function rpl_func may have a slightly different @@ -225,6 +251,14 @@ _GL_EXTERN_C int _gl_cxxalias_dummy #endif +/* _GL_CXXALIAS_MDA_CAST (func, rettype, parameters); + is like _GL_CXXALIAS_MDA (func, rettype, parameters); + except that the C function func may have a slightly different declaration. + A cast is used to silence the "invalid conversion" error that would + otherwise occur. */ +#define _GL_CXXALIAS_MDA_CAST(func,rettype,parameters) \ + _GL_CXXALIAS_RPL_CAST_1 (func, _##func, rettype, parameters) + /* _GL_CXXALIAS_SYS (func, rettype, parameters); declares a C++ alias called GNULIB_NAMESPACE::func that redirects to the system provided function func, if GNULIB_NAMESPACE @@ -320,9 +354,9 @@ _GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE) # define _GL_CXXALIASWARN_1(func,namespace) \ _GL_CXXALIASWARN_2 (func, namespace) -/* To work around GCC bug <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>, +/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>, we enable the warning only when not optimizing. */ -# if !__OPTIMIZE__ +# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__) # define _GL_CXXALIASWARN_2(func,namespace) \ _GL_WARN_ON_USE (func, \ "The symbol ::" #func " refers to the system function. " \ @@ -348,16 +382,13 @@ GNULIB_NAMESPACE) # define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) \ _GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace) -/* To work around GCC bug <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>, +/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>, we enable the warning only when not optimizing. */ -# if !__OPTIMIZE__ +# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__) # define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \ - _GL_WARN_ON_USE_CXX (func, rettype, parameters_and_attributes, \ + _GL_WARN_ON_USE_CXX (func, rettype, rettype, parameters_and_attributes, \ "The symbol ::" #func " refers to the system function. " \ "Use " #namespace "::" #func " instead.") -# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING -# define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \ - extern __typeof__ (func) func # else # define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \ _GL_EXTERN_C int _gl_cxxalias_dummy @@ -370,11 +401,27 @@ #endif /* _GL_CXXDEFS_H */ /* The definition of _GL_ARG_NONNULL is copied here. */ +/* A C macro for declaring that specific arguments must not be NULL. + Copyright (C) 2009-2021 Free Software Foundation, Inc. + + This program 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 of the License, or + (at your option) any later version. + + This program 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 program. If not, see <https://www.gnu.org/licenses/>. */ + /* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools that the values passed as arguments n, ..., m must be non-NULL pointers. n = 1 stands for the first argument, n = 2 for the second argument etc. */ #ifndef _GL_ARG_NONNULL -# if (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || __GNUC__ > 3 +# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || defined __clang__ # define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params)) # else # define _GL_ARG_NONNULL(params) @@ -382,40 +429,143 @@ #endif /* The definition of _GL_WARN_ON_USE is copied here. */ +/* A C macro for emitting warnings if a function is used. + Copyright (C) 2010-2021 Free Software Foundation, Inc. + + This program 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 of the License, or + (at your option) any later version. + + This program 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 program. If not, see <https://www.gnu.org/licenses/>. */ + +/* _GL_WARN_ON_USE (function, "literal string") issues a declaration + for FUNCTION which will then trigger a compiler warning containing + the text of "literal string" anywhere that function is called, if + supported by the compiler. If the compiler does not support this + feature, the macro expands to an unused extern declaration. + + _GL_WARN_ON_USE_ATTRIBUTE ("literal string") expands to the + attribute used in _GL_WARN_ON_USE. If the compiler does not support + this feature, it expands to empty. + + These macros are useful for marking a function as a potential + portability trap, with the intent that "literal string" include + instructions on the replacement function that should be used + instead. + _GL_WARN_ON_USE is for functions with 'extern' linkage. + _GL_WARN_ON_USE_ATTRIBUTE is for functions with 'static' or 'inline' + linkage. + + However, one of the reasons that a function is a portability trap is + if it has the wrong signature. Declaring FUNCTION with a different + signature in C is a compilation error, so this macro must use the + same type as any existing declaration so that programs that avoid + the problematic FUNCTION do not fail to compile merely because they + included a header that poisoned the function. But this implies that + _GL_WARN_ON_USE is only safe to use if FUNCTION is known to already + have a declaration. Use of this macro implies that there must not + be any other macro hiding the declaration of FUNCTION; but + undefining FUNCTION first is part of the poisoning process anyway + (although for symbols that are provided only via a macro, the result + is a compilation error rather than a warning containing + "literal string"). Also note that in C++, it is only safe to use if + FUNCTION has no overloads. + + For an example, it is possible to poison 'getline' by: + - adding a call to gl_WARN_ON_USE_PREPARE([[#include <stdio.h>]], + [getline]) in configure.ac, which potentially defines + HAVE_RAW_DECL_GETLINE + - adding this code to a header that wraps the system <stdio.h>: + #undef getline + #if HAVE_RAW_DECL_GETLINE + _GL_WARN_ON_USE (getline, "getline is required by POSIX 2008, but" + "not universally present; use the gnulib module getline"); + #endif + + It is not possible to directly poison global variables. But it is + possible to write a wrapper accessor function, and poison that + (less common usage, like &environ, will cause a compilation error + rather than issue the nice warning, but the end result of informing + the developer about their portability problem is still achieved): + #if HAVE_RAW_DECL_ENVIRON + static char *** + rpl_environ (void) { return &environ; } + _GL_WARN_ON_USE (rpl_environ, "environ is not always properly declared"); + # undef environ + # define environ (*rpl_environ ()) + #endif + or better (avoiding contradictory use of 'static' and 'extern'): + #if HAVE_RAW_DECL_ENVIRON + static char *** + _GL_WARN_ON_USE_ATTRIBUTE ("environ is not always properly declared") + rpl_environ (void) { return &environ; } + # undef environ + # define environ (*rpl_environ ()) + #endif + */ #ifndef _GL_WARN_ON_USE # if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) /* A compiler attribute is available in gcc versions 4.3.0 and later. */ # define _GL_WARN_ON_USE(function, message) \ extern __typeof__ (function) function __attribute__ ((__warning__ (message))) +# define _GL_WARN_ON_USE_ATTRIBUTE(message) \ + __attribute__ ((__warning__ (message))) +# elif __clang_major__ >= 4 +/* Another compiler attribute is available in clang. */ +# define _GL_WARN_ON_USE(function, message) \ +extern __typeof__ (function) function \ + __attribute__ ((__diagnose_if__ (1, message, "warning"))) +# define _GL_WARN_ON_USE_ATTRIBUTE(message) \ + __attribute__ ((__diagnose_if__ (1, message, "warning"))) # elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING /* Verify the existence of the function. */ # define _GL_WARN_ON_USE(function, message) \ extern __typeof__ (function) function +# define _GL_WARN_ON_USE_ATTRIBUTE(message) # else /* Unsupported. */ # define _GL_WARN_ON_USE(function, message) \ _GL_WARN_EXTERN_C int _gl_warn_on_use +# define _GL_WARN_ON_USE_ATTRIBUTE(message) # endif #endif -/* _GL_WARN_ON_USE_CXX (function, rettype, parameters_and_attributes, "string") - is like _GL_WARN_ON_USE (function, "string"), except that the function is - declared with the given prototype, consisting of return type, parameters, - and attributes. +/* _GL_WARN_ON_USE_CXX (function, rettype_gcc, rettype_clang, parameters_and_attributes, "message") + is like _GL_WARN_ON_USE (function, "message"), except that in C++ mode the + function is declared with the given prototype, consisting of return type, + parameters, and attributes. This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does not work in this case. */ #ifndef _GL_WARN_ON_USE_CXX -# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) -# define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \ -extern rettype function parameters_and_attributes \ - __attribute__ ((__warning__ (msg))) -# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING +# if !defined __cplusplus +# define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ + _GL_WARN_ON_USE (function, msg) +# else +# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) +/* A compiler attribute is available in gcc versions 4.3.0 and later. */ +# define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ +extern rettype_gcc function parameters_and_attributes \ + __attribute__ ((__warning__ (msg))) +# elif __clang_major__ >= 4 +/* Another compiler attribute is available in clang. */ +# define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ +extern rettype_clang function parameters_and_attributes \ + __attribute__ ((__diagnose_if__ (1, msg, "warning"))) +# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING /* Verify the existence of the function. */ -# define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \ -extern rettype function parameters_and_attributes -# else /* Unsupported. */ -# define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \ +# define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ +extern rettype_gcc function parameters_and_attributes +# else /* Unsupported. */ +# define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ _GL_WARN_EXTERN_C int _gl_warn_on_use +# endif # endif #endif @@ -483,25 +633,35 @@ typedef void (*sighandler_t) (int); #endif -#if 0 +#if IN_M4_GNULIB_TESTS # if 0 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) # undef pthread_sigmask # define pthread_sigmask rpl_pthread_sigmask # endif _GL_FUNCDECL_RPL (pthread_sigmask, int, - (int how, const sigset_t *new_mask, sigset_t *old_mask)); + (int how, + const sigset_t *restrict new_mask, + sigset_t *restrict old_mask)); _GL_CXXALIAS_RPL (pthread_sigmask, int, - (int how, const sigset_t *new_mask, sigset_t *old_mask)); + (int how, + const sigset_t *restrict new_mask, + sigset_t *restrict old_mask)); # else -# if !1 +# if !(0 || defined pthread_sigmask) _GL_FUNCDECL_SYS (pthread_sigmask, int, - (int how, const sigset_t *new_mask, sigset_t *old_mask)); + (int how, + const sigset_t *restrict new_mask, + sigset_t *restrict old_mask)); # endif _GL_CXXALIAS_SYS (pthread_sigmask, int, - (int how, const sigset_t *new_mask, sigset_t *old_mask)); + (int how, + const sigset_t *restrict new_mask, + sigset_t *restrict old_mask)); # endif +# if __GLIBC__ >= 2 _GL_CXXALIASWARN (pthread_sigmask); +# endif #elif defined GNULIB_POSIXCHECK # undef pthread_sigmask # if HAVE_RAW_DECL_PTHREAD_SIGMASK @@ -525,7 +685,9 @@ _GL_FUNCDECL_SYS (raise, int, (int sig)); # endif _GL_CXXALIAS_SYS (raise, int, (int sig)); # endif +# if __GLIBC__ >= 2 _GL_CXXALIASWARN (raise); +# endif #elif defined GNULIB_POSIXCHECK # undef raise /* Assume raise is always declared. */ @@ -557,7 +719,7 @@ typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1]; /* When also using extern inline, suppress the use of static inline in standard headers of problematic Apple configurations, as Libc at least through Libc-825.26 (2013-04-09) mishandles it; see, e.g., - <http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>. + <https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html>. Perhaps Apple will fix this some day. */ #if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \ && (defined __i386__ || defined __x86_64__)) @@ -648,10 +810,14 @@ _GL_CXXALIASWARN (sigpending); # define SIG_SETMASK 1 /* blocked_set = *set; */ # define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */ _GL_FUNCDECL_SYS (sigprocmask, int, - (int operation, const sigset_t *set, sigset_t *old_set)); + (int operation, + const sigset_t *restrict set, + sigset_t *restrict old_set)); # endif _GL_CXXALIAS_SYS (sigprocmask, int, - (int operation, const sigset_t *set, sigset_t *old_set)); + (int operation, + const sigset_t *restrict set, + sigset_t *restrict old_set)); _GL_CXXALIASWARN (sigprocmask); /* Install the handler FUNC for signal SIG, and return the previous @@ -675,10 +841,18 @@ _GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t, _GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t, (int sig, _gl_function_taking_int_returning_void_t func)); # else +/* On OpenBSD, the declaration of 'signal' may not be present at this point, + because it occurs in <sys/signal.h>, not <signal.h> directly. */ +# if defined __OpenBSD__ +_GL_FUNCDECL_SYS (signal, _gl_function_taking_int_returning_void_t, + (int sig, _gl_function_taking_int_returning_void_t func)); +# endif _GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t, (int sig, _gl_function_taking_int_returning_void_t func)); # endif +# if __GLIBC__ >= 2 _GL_CXXALIASWARN (signal); +# endif # if !1 && GNULIB_defined_SIGPIPE /* Raise signal SIGPIPE. */ |