libmicrohttpd

HTTP/1.x server C library (MHD 1.x, stable)
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mhd_debug_funcs.c (2890B)

      1 /*
      2      This file is part of GNU libmicrohttpd
      3      Copyright (C) 2022 Evgeny Grin (Karlson2k)
      4 
      5      GNU libmicrohttpd is free software; you can redistribute it and/or
      6      modify it under the terms of the GNU Lesser General Public
      7      License as published by the Free Software Foundation; either
      8      version 2.1 of the License, or (at your option) any later version.
      9 
     10      This library is distributed in the hope that it will be useful,
     11      but WITHOUT ANY WARRANTY; without even the implied warranty of
     12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13      Lesser General Public License for more details.
     14 
     15      You should have received a copy of the GNU Lesser General Public
     16      License along with GNU libmicrohttpd.
     17      If not, see <http://www.gnu.org/licenses/>.
     18 */
     19 
     20 /**
     21  * @file testzzuf/mhd_debug_funcs.c
     22  * @brief  Implementations of MHD private debug functions
     23  * @author Karlson2k (Evgeny Grin)
     24  */
     25 
     26 #include "mhd_debug_funcs.h"
     27 #include "internal.h"
     28 #include "mhd_sockets.h"
     29 
     30 /**
     31  * Checks whether MHD can use accept() syscall and
     32  * avoid accept4() syscall.
     33  * @return non-zero if accept() is possible,
     34  *         zero if accept4() is always used by MHD
     35  */
     36 int
     37 MHD_is_avoid_accept4_possible_ (void)
     38 {
     39 #if ! defined(USE_ACCEPT4)
     40   return ! 0;
     41 #else  /* ! USE_ACCEPT4 */
     42   return (MHD_YES == MHD_is_feature_supported (MHD_FEATURE_DEBUG_BUILD)) ?
     43          ! 0 : 0;
     44 #endif /* ! USE_ACCEPT4 */
     45 }
     46 
     47 
     48 /**
     49  * Switch MHD daemon to use accept() syscalls for new connections.
     50  * @param daemon the daemon to operate
     51  */
     52 void
     53 MHD_avoid_accept4_ (struct MHD_Daemon *daemon)
     54 {
     55   (void) daemon; /* Mute compiler warning */
     56 #ifdef USE_ACCEPT4
     57 #ifdef _DEBUG
     58   daemon->avoid_accept4 = true;
     59 #else  /* ! _DEBUG */
     60   abort ();
     61 #endif /* ! _DEBUG */
     62 #endif /* USE_ACCEPT4 */
     63 }
     64 
     65 #ifdef MHD_ASAN_ACTIVE
     66 #define MHD_ASAN_ENABLED_ 1
     67 #else  /* ! MHD_ASAN_ACTIVE */
     68 #ifdef __SANITIZE_ADDRESS__
     69 #define MHD_ASAN_ENABLED_ 1
     70 #else  /* ! __SANITIZE_ADDRESS__ */
     71 #if defined(__has_feature)
     72 #if __has_feature(address_sanitizer)
     73 #define MHD_ASAN_ENABLED_ 1
     74 #endif /* __has_feature(address_sanitizer) */
     75 #endif /* __has_feature */
     76 #endif /* ! __SANITIZE_ADDRESS__ */
     77 #endif /* ! MHD_ASAN_ACTIVE */
     78 /**
     79  * Checks whether any know sanitizer is enabled for this build.
     80  * zzuf does not work together with sanitizers as both are intercepting
     81  * standard library calls.
     82  * @return non-zero if any sanitizer is enabled,
     83  *         zero otherwise
     84  */
     85 int
     86 MHD_are_sanitizers_enabled_ (void)
     87 {
     88   int ret = 0;
     89 #ifdef MHD_ASAN_ENABLED_
     90   ++ret;
     91 #endif /* ! MHD_ASAN_ENABLED_ */
     92 #if defined(__has_feature)
     93 #if __has_feature(thread_sanitizer)
     94   ++ret;
     95 #endif
     96 #if __has_feature(memory_sanitizer)
     97   ++ret;
     98 #endif
     99 #if __has_feature(dataflow_sanitizer)
    100   ++ret;
    101 #endif
    102 #else  /* ! defined(__has_feature) */
    103 #ifdef __SANITIZE_THREAD__
    104   ++ret;
    105 #endif
    106 #endif /* ! defined(__has_feature) */
    107   return ret;
    108 }