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, see <http://www.gnu.org/licenses/>.
  27
  28    The GNU General Public License is contained in the file COPYING.
  29 */
  30
  31 #include "pub_core_basics.h"
  32 #include "pub_core_threadstate.h"
  33 #include "pub_core_vki.h"
  34 #include "pub_core_xarray.h"
  35 #include "pub_core_clientstate.h"
  36
  37 /*-----------------------------------------------------------------*/
  38 /*---                                                           ---*/
  39 /*--- Basic globals about the address space.                    ---*/
  40 /*---                                                           ---*/
  41 /*-----------------------------------------------------------------*/
  42
  43 /* Client address space, lowest to highest (see top of ume.c) */
  44 // TODO: get rid of as many of these as possible.
  45
  46 /* ***Initial*** lowest address of the stack segment of the main thread.
  47    The main stack will grow if needed but VG_(clstk_start_base) will
  48    not be changed according to the growth. */
  49 Addr  VG_(clstk_start_base)  = 0;
  50 /* Initial highest address of the stack segment of the main thread. */
  51 Addr  VG_(clstk_end)   = 0;
  52 UWord VG_(clstk_id)    = NULL_STK_ID;
  53 /* Maximum size of the main thread's client stack. */
  54 SizeT VG_(clstk_max_size) = 0;
  55
  56 /* Solaris and Linux only, specifies where the client auxv is.
  57
  58    This is set up as part of setup_client_stack() in
  59    initimg-{linux,solaris}.c. */
  60 UWord* VG_(client_auxv) = NULL;
  61
  62 Addr  VG_(brk_base)    = 0;       /* start of brk */
  63 Addr  VG_(brk_limit)   = 0;       /* current brk */
  64
  65 /* A fd which refers to the client executable. */
  66 Int VG_(cl_exec_fd) = -1;
  67
  68 /* A fd which refers to the fake /proc/<pid>/cmdline in /tmp. */
  69 Int VG_(cl_cmdline_fd) = -1;
  70
  71 /* A fd which refers to the fake /proc/<pid>/auxv in /tmp. */
  72 Int VG_(cl_auxv_fd) = -1;
  73
  74 #if defined(VGO_solaris)
  75 /* A fd which refers to the fake /proc/<pid>/psinfo in /tmp. */
  76 Int VG_(cl_psinfo_fd) = -1;
  77 #endif /* VGO_solaris */
  78
  79 // Command line pieces, after they have been extracted from argv in
  80 // m_main.main().  The payload vectors are allocated in VG_AR_CORE
  81 // (the default arena).  They are never freed.
  82
  83 /* Args for the client. */
  84 XArray* /* of HChar* */ VG_(args_for_client) = NULL;
  85
  86 /* Args for V (augments, then those from the launcher). */
  87 XArray* /* of HChar* */ VG_(args_for_valgrind) = NULL;
  88
  89 /* How many of the above not to pass on at execve time? */
  90 Int VG_(args_for_valgrind_noexecpass) = 0;
  91
  92 /* The name of the client executable, as specified on the command
  93    line. */
  94 const HChar* VG_(args_the_exename) = NULL;
  95
  96 // Client's original rlimit data and rlimit stack
  97 struct vki_rlimit VG_(client_rlimit_data);
  98 struct vki_rlimit VG_(client_rlimit_stack);
  99
 100 // Name of the launcher, as extracted from VALGRIND_LAUNCHER at
 101 // startup.
 102 HChar* VG_(name_of_launcher) = NULL;
 103
 104 /* Application-visible file descriptor limits */
 105 Int VG_(fd_soft_limit) = -1;
 106 Int VG_(fd_hard_limit) = -1;
 107
 108 /* Useful addresses extracted from the client. */
 109 /* Where is the freeres_wrapper routine we made? */
 110 Addr VG_(client_freeres_wrapper) = 0;
 111
 112 /* x86-linux only: where is glibc's _dl_sysinfo_int80 function?
 113    Finding it isn't essential, but knowing where it is does sometimes
 114    help produce better back traces.  See big comment in
 115    VG_(get_StackTrace) in m_stacktrace.c for further info. */
 116 Addr VG_(client__dl_sysinfo_int80) = 0;
 117
 118 /* Address of the (internal) glibc nptl pthread stack cache size,
 119    declared as:
 120       static size_t stack_cache_actsize;
 121    in nptl/allocatestack.c */
 122 SizeT* VG_(client__stack_cache_actsize__addr) = 0;
 123
 124 #if defined(VGO_solaris)
 125 /* Address of variable vg_vfork_fildes in vgpreload_core.so.0
 126    (vg_preloaded.c). */
 127 Int* VG_(vfork_fildes_addr) = 0;
 128 #endif
 129
 130 /*--------------------------------------------------------------------*/
 131 /*--- end                                                          ---*/
 132 /*--------------------------------------------------------------------*/