LCOV - app.info - js/src/jsnativestack.cpp

LCOV - code coverage report
| Current view: | directory - js/src - jsnativestack.cpp (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 11 | 11 | 100.0 %
| Date: | 2012-04-07 | Functions: | 1 | 1 | 100.0 %

           1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
           2                 :  * vim: set ts=8 et sw=4 tw=80:
           3                 :  */
           4                 : /* ***** BEGIN LICENSE BLOCK *****
           5                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           6                 :  *
           7                 :  * The contents of this file are subject to the Mozilla Public License Version
           8                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           9                 :  * the License. You may obtain a copy of the License at
          10                 :  * http://www.mozilla.org/MPL/
          11                 :  *
          12                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          13                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          14                 :  * for the specific language governing rights and limitations under the
          15                 :  * License.
          16                 :  *
          17                 :  * The Original Code is Mozilla code.
          18                 :  *
          19                 :  * The Initial Developer of the Original Code is the Mozilla Corporation.
          20                 :  * Portions created by the Initial Developer are Copyright (C) 2009
          21                 :  * the Initial Developer. All Rights Reserved.
          22                 :  *
          23                 :  * Contributor(s):
          24                 :  *
          25                 :  * Alternatively, the contents of this file may be used under the terms of
          26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          29                 :  * of those above. If you wish to allow use of your version of this file only
          30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          31                 :  * use your version of this file under the terms of the MPL, indicate your
          32                 :  * decision by deleting the provisions above and replace them with the notice
          33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          34                 :  * the provisions above, a recipient may use your version of this file under
          35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          36                 :  *
          37                 :  * ***** END LICENSE BLOCK ***** */
          38                 :
          39                 : #include <stdlib.h>
          40                 : #include "jstypes.h"
          41                 : #include "jsnativestack.h"
          42                 :
          43                 : #ifdef XP_WIN
          44                 : # include "jswin.h"
          45                 :
          46                 : #elif defined(XP_OS2)
          47                 : # define INCL_DOSPROCESS
          48                 : # include <os2.h>
          49                 :
          50                 : #elif defined(XP_MACOSX) || defined(DARWIN) || defined(XP_UNIX)
          51                 : # include <pthread.h>
          52                 :
          53                 : # if defined(__FreeBSD__) || defined(__OpenBSD__)
          54                 : #  include <pthread_np.h>
          55                 : # endif
          56                 :
          57                 : #else
          58                 : # error "Unsupported platform"
          59                 :
          60                 : #endif
          61                 :
          62                 : namespace js {
          63                 :
          64                 : #if defined(XP_WIN)
          65                 :
          66                 : void *
          67                 : GetNativeStackBaseImpl()
          68                 : {
          69                 : # if defined(_M_IX86) && defined(_MSC_VER)
          70                 :     /*
          71                 :      * offset 0x18 from the FS segment register gives a pointer to
          72                 :      * the thread information block for the current thread
          73                 :      */
          74                 :     NT_TIB* pTib;
          75                 :     __asm {
          76                 :         MOV EAX, FS:[18h]
          77                 :         MOV pTib, EAX
          78                 :     }
          79                 :     return static_cast<void*>(pTib->StackBase);
          80                 :
          81                 : # elif defined(_M_X64)
          82                 :     PNT_TIB64 pTib = reinterpret_cast<PNT_TIB64>(NtCurrentTeb());
          83                 :     return reinterpret_cast<void*>(pTib->StackBase);
          84                 :
          85                 : # elif defined(_WIN32) && defined(__GNUC__)
          86                 :     NT_TIB* pTib;
          87                 :     asm ("movl %%fs:0x18, %0\n" : "=r" (pTib));
          88                 :     return static_cast<void*>(pTib->StackBase);
          89                 :
          90                 : # endif
          91                 : }
          92                 :
          93                 : #elif defined(SOLARIS)
          94                 :
          95                 : #include <ucontext.h>
          96                 :
          97                 : JS_STATIC_ASSERT(JS_STACK_GROWTH_DIRECTION < 0);
          98                 :
          99                 : void *
         100                 : GetNativeStackBaseImpl()
         101                 : {
         102                 :     stack_t st;
         103                 :     stack_getbounds(&st);
         104                 :     return static_cast<char*>(st.ss_sp) + st.ss_size;
         105                 : }
         106                 :
         107                 : #elif defined(AIX)
         108                 :
         109                 : #include <ucontext.h>
         110                 :
         111                 : JS_STATIC_ASSERT(JS_STACK_GROWTH_DIRECTION < 0);
         112                 :
         113                 : void *
         114                 : GetNativeStackBaseImpl()
         115                 : {
         116                 :     ucontext_t context;
         117                 :     getcontext(&context);
         118                 :     return static_cast<char*>(context.uc_stack.ss_sp) +
         119                 :         context.uc_stack.ss_size;
         120                 : }
         121                 :
         122                 : #elif defined(XP_OS2)
         123                 :
         124                 : void *
         125                 : GetNativeStackBaseImpl()
         126                 : {
         127                 :     PTIB  ptib;
         128                 :     PPIB  ppib;
         129                 :
         130                 :     DosGetInfoBlocks(&ptib, &ppib);
         131                 :     return ptib->tib_pstacklimit;
         132                 : }
         133                 :
         134                 : #else /* XP_UNIX */
         135                 :
         136                 : void *
         137           18761 : GetNativeStackBaseImpl()
         138                 : {
         139           18761 :     pthread_t thread = pthread_self();
         140                 : # if defined(XP_MACOSX) || defined(DARWIN)
         141                 :     return pthread_get_stackaddr_np(thread);
         142                 :
         143                 : # else
         144                 :     pthread_attr_t sattr;
         145           18761 :     pthread_attr_init(&sattr);
         146                 : #  if defined(__OpenBSD__)
         147                 :     stack_t ss;
         148                 : #  elif defined(PTHREAD_NP_H) || defined(_PTHREAD_NP_H_) || defined(NETBSD)
         149                 :     /* e.g. on FreeBSD 4.8 or newer, neundorf@kde.org */
         150                 :     pthread_attr_get_np(thread, &sattr);
         151                 : #  else
         152                 :     /*
         153                 :      * FIXME: this function is non-portable;
         154                 :      * other POSIX systems may have different np alternatives
         155                 :      */
         156           18761 :     pthread_getattr_np(thread, &sattr);
         157                 : #  endif
         158                 :
         159           18761 :     void *stackBase = 0;
         160           18761 :     size_t stackSize = 0;
         161                 : #  ifdef DEBUG
         162                 :     int rc =
         163                 : #  endif
         164                 : # if defined(__OpenBSD__)
         165                 :         pthread_stackseg_np(pthread_self(), &ss);
         166                 :     stackBase = (void*)((size_t) ss.ss_sp - ss.ss_size);
         167                 :     stackSize = ss.ss_size;
         168                 : # else
         169           18761 :         pthread_attr_getstack(&sattr, &stackBase, &stackSize);
         170                 : # endif
         171           18761 :     JS_ASSERT(!rc);
         172           18761 :     JS_ASSERT(stackBase);
         173           18761 :     pthread_attr_destroy(&sattr);
         174                 :
         175                 : #  if JS_STACK_GROWTH_DIRECTION > 0
         176                 :     return stackBase;
         177                 : #  else
         178           18761 :     return static_cast<char*>(stackBase) + stackSize;
         179                 : #  endif
         180                 : # endif
         181                 : }
         182                 :
         183                 : #endif /* !XP_WIN */
         184                 :
         185                 : } /* namespace js */

Generated by: LCOV version 1.7