sys/__libc_init.c

   1 /*
   2  * Copyright (c) 2005-2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * __libc_init() is called from libSystem_initializer()
  25  */
  26
  27 #include <stdint.h>
  28 #include <pthread.h>
  29 #include <pthread_machdep.h>
  30 #include <machine/cpu_capabilities.h>
  31
  32 struct ProgramVars; /* forward reference */
  33
  34 extern void _program_vars_init(const struct ProgramVars *vars);
  35 extern void _libc_fork_init(void (*prepare)(void), void (*parent)(void), void (*child)(void));
  36 extern void _init_clock_port();
  37 extern pthread_lock_t _malloc_lock;
  38 extern void __xlocale_init(void);
  39 extern void __pthread_pfz_setup(const char *apple[]);
  40 extern void __guard_setup(const char *apple[]);
  41 extern void __malloc_entropy_setup(const char *apple[]);
  42 extern int usenew_impl;
  43
  44 __private_extern__ uintptr_t commpage_pfz_base;
  45
  46 #ifdef PR_5243343
  47 /* 5243343 - temporary hack to detect if we are running the conformance test */
  48 #include <stdlib.h>
  49 __private_extern__ int PR_5243343_flag = 0;
  50 #endif /* PR_5243343 */
  51 __private_extern__ int __pthread_lock_debug = 0;
  52 __private_extern__ int __pthread_lock_old = 0;
  53
  54
  55 void
  56 __libc_init(const struct ProgramVars *vars, void (*atfork_prepare)(void), void (*atfork_parent)(void), void (*atfork_child)(void), const char *apple[])
  57 {
  58         _program_vars_init(vars);
  59         _libc_fork_init(atfork_prepare, atfork_parent, atfork_child);
  60         LOCK_INIT(_malloc_lock);
  61         _init_clock_port();
  62         __xlocale_init();
  63         __guard_setup(apple);
  64         __pthread_pfz_setup(apple);
  65         __malloc_entropy_setup(apple);
  66
  67
  68 #ifdef PR_5243343
  69         /* 5243343 - temporary hack to detect if we are running the conformance test */
  70         if(getenv("TET_EXECUTE"))
  71                 PR_5243343_flag = 1;
  72 #endif /* PR_5243343 */
  73 #if defined(__i386__) || defined(__x86_64__)
  74         if(getenv("__PTHREAD_LOCK_DEBUG__"))
  75                 __pthread_lock_debug = 1;
  76         if(getenv("__PTHREAD_LOCK_OLD__")) {
  77                 __pthread_lock_old = 1;
  78                 usenew_impl = 0;
  79         }
  80 #endif
  81
  82 }