coregrind/m_clientstate.c

   1
   2 /*--------------------------------------------------------------------*/
   3 /*--- A home for miscellaneous bits of information which pertain   ---*/
   4 /*--- to the client's state.                                       ---*/
   5 /*---                                              m_clientstate.c ---*/
   6 /*--------------------------------------------------------------------*/
   7
   8 /*
   9    This file is part of Valgrind, a dynamic binary instrumentation
  10    framework.
  11
  12    Copyright (C) 2000-2017 Julian Seward
  13       jseward@acm.org
  14
  15    This program is free software; you can redistribute it and/or
  16    modify it under the terms of the GNU General Public License as
  17    published by the Free Software Foundation; either version 2 of the
  18    License, or (at your option) any later version.
  19
  20    This program is distributed in the hope that it will be useful, but
  21    WITHOUT ANY WARRANTY; without even the implied warranty of
  22    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23    General Public License for more details.
  24
  25    You should have received a copy of the GNU General Public License
  26    along with this program; if not, write to the Free Software
  27    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  28    02111-1307, USA.
  29
  30    The GNU General Public License is contained in the file COPYING.
  31 */
  32
  33 #include "pub_core_basics.h"
  34 #include "pub_core_threadstate.h"
  35 #include "pub_core_vki.h"
  36 #include "pub_core_xarray.h"
  37 #include "pub_core_clientstate.h"
  38
  39 /*-----------------------------------------------------------------*/
  40 /*---                                                           ---*/
  41 /*--- Basic globals about the address space.                    ---*/
  42 /*---                                                           ---*/
  43 /*-----------------------------------------------------------------*/
  44
  45 /* Client address space, lowest to highest (see top of ume.c) */
  46 // TODO: get rid of as many of these as possible.
  47
  48 /* ***Initial*** lowest address of the stack segment of the main thread.
  49    The main stack will grow if needed but VG_(clstk_start_base) will
  50    not be changed according to the growth. */
  51 Addr  VG_(clstk_start_base)  = 0;
  52 /* Initial highest address of the stack segment of the main thread. */
  53 Addr  VG_(clstk_end)   = 0;
  54 UWord VG_(clstk_id)    = NULL_STK_ID;
  55 /* Maximum size of the main thread's client stack. */
  56 SizeT VG_(clstk_max_size) = 0;
  57
  58 /* Solaris and Linux only, specifies where the client auxv is.
  59
  60    This is set up as part of setup_client_stack() in
  61    initimg-{linux,solaris}.c. */
  62 UWord* VG_(client_auxv) = NULL;
  63
  64 Addr  VG_(brk_base)    = 0;       /* start of brk */
  65 Addr  VG_(brk_limit)   = 0;       /* current brk */
  66
  67 /* A fd which refers to the client executable. */
  68 Int VG_(cl_exec_fd) = -1;
  69
  70 /* A fd which refers to the fake /proc/<pid>/cmdline in /tmp. */
  71 Int VG_(cl_cmdline_fd) = -1;
  72
  73 /* A fd which refers to the fake /proc/<pid>/auxv in /tmp. */
  74 Int VG_(cl_auxv_fd) = -1;
  75
  76 #if defined(VGO_solaris)
  77 /* A fd which refers to the fake /proc/<pid>/psinfo in /tmp. */
  78 Int VG_(cl_psinfo_fd) = -1;
  79 #endif /* VGO_solaris */
  80
  81 // Command line pieces, after they have been extracted from argv in
  82 // m_main.main().  The payload vectors are allocated in VG_AR_CORE
  83 // (the default arena).  They are never freed.
  84
  85 /* Args for the client. */
  86 XArray* /* of HChar* */ VG_(args_for_client) = NULL;
  87
  88 /* Args for V (augments, then those from the launcher). */
  89 XArray* /* of HChar* */ VG_(args_for_valgrind) = NULL;
  90
  91 /* How many of the above not to pass on at execve time? */
  92 Int VG_(args_for_valgrind_noexecpass) = 0;
  93
  94 /* The name of the client executable, as specified on the command
  95    line. */
  96 const HChar* VG_(args_the_exename) = NULL;
  97
  98 // Client's original rlimit data and rlimit stack
  99 struct vki_rlimit VG_(client_rlimit_data);
 100 struct vki_rlimit VG_(client_rlimit_stack);
 101
 102 // Name of the launcher, as extracted from VALGRIND_LAUNCHER at
 103 // startup.
 104 HChar* VG_(name_of_launcher) = NULL;
 105
 106 /* Application-visible file descriptor limits */
 107 Int VG_(fd_soft_limit) = -1;
 108 Int VG_(fd_hard_limit) = -1;
 109
 110 /* Useful addresses extracted from the client. */
 111 /* Where is the freeres_wrapper routine we made? */
 112 Addr VG_(client_freeres_wrapper) = 0;
 113
 114 /* x86-linux only: where is glibc's _dl_sysinfo_int80 function?
 115    Finding it isn't essential, but knowing where it is does sometimes
 116    help produce better back traces.  See big comment in
 117    VG_(get_StackTrace) in m_stacktrace.c for further info. */
 118 Addr VG_(client__dl_sysinfo_int80) = 0;
 119
 120 /* Address of the (internal) glibc nptl pthread stack cache size,
 121    declared as:
 122       static size_t stack_cache_actsize;
 123    in nptl/allocatestack.c */
 124 SizeT* VG_(client__stack_cache_actsize__addr) = 0;
 125
 126 #if defined(VGO_solaris)
 127 /* Address of variable vg_vfork_fildes in vgpreload_core.so.0
 128    (vg_preloaded.c). */
 129 Int* VG_(vfork_fildes_addr) = 0;
 130 #endif
 131
 132 /*--------------------------------------------------------------------*/
 133 /*--- end                                                          ---*/
 134 /*--------------------------------------------------------------------*/