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) 2000-2013 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_vki.h"
35#include "pub_core_xarray.h"
36#include "pub_core_clientstate.h"
37
38/*-----------------------------------------------------------------*/
39/*---                                                           ---*/
40/*--- Basic globals about the address space.                    ---*/
41/*---                                                           ---*/
42/*-----------------------------------------------------------------*/
43
44/* Client address space, lowest to highest (see top of ume.c) */
45// TODO: get rid of as many of these as possible.
46
47/* ***Initial*** lowest address of the stack segment of the main thread.
48   The main stack will grow if needed but VG_(clstk_start_base) will
49   not be changed according to the growth. */
50Addr  VG_(clstk_start_base)  = 0;
51/* Initial highest address of the stack segment of the main thread. */
52Addr  VG_(clstk_end)   = 0;
53UWord VG_(clstk_id)    = 0;
54
55/* linux only: where is the client auxv ? */
56/* This is set up as part of setup_client_stack in initimg-linux.c. */
57UWord* VG_(client_auxv) = NULL;
58
59Addr  VG_(brk_base)    = 0;       /* start of brk */
60Addr  VG_(brk_limit)   = 0;       /* current brk */
61
62/* A fd which refers to the client executable. */
63Int VG_(cl_exec_fd) = -1;
64
65/* A fd which refers to the fake /proc/<pid>/cmdline in /tmp. */
66Int VG_(cl_cmdline_fd) = -1;
67
68/* A fd which refers to the fake /proc/<pid>/auxv in /tmp. */
69Int VG_(cl_auxv_fd) = -1;
70
71// Command line pieces, after they have been extracted from argv in
72// m_main.main().  The payload vectors are allocated in VG_AR_CORE
73// (the default arena).  They are never freed.
74
75/* Args for the client. */
76XArray* /* of HChar* */ VG_(args_for_client) = NULL;
77
78/* Args for V (augments, then those from the launcher). */
79XArray* /* of HChar* */ VG_(args_for_valgrind) = NULL;
80
81/* How many of the above not to pass on at execve time? */
82Int VG_(args_for_valgrind_noexecpass) = 0;
83
84/* The name of the client executable, as specified on the command
85   line. */
86const HChar* VG_(args_the_exename) = NULL;
87
88// Client's original rlimit data and rlimit stack
89struct vki_rlimit VG_(client_rlimit_data);
90struct vki_rlimit VG_(client_rlimit_stack);
91
92// Name of the launcher, as extracted from VALGRIND_LAUNCHER at
93// startup.
94HChar* VG_(name_of_launcher) = NULL;
95
96/* Application-visible file descriptor limits */
97Int VG_(fd_soft_limit) = -1;
98Int VG_(fd_hard_limit) = -1;
99
100/* Useful addresses extracted from the client */
101/* Where is the __libc_freeres_wrapper routine we made? */
102Addr VG_(client___libc_freeres_wrapper) = 0;
103
104/* x86-linux only: where is glibc's _dl_sysinfo_int80 function?
105   Finding it isn't essential, but knowing where it is does sometimes
106   help produce better back traces.  See big comment in
107   VG_(get_StackTrace) in m_stacktrace.c for further info. */
108Addr VG_(client__dl_sysinfo_int80) = 0;
109
110/* Address of the (internal) glibc nptl pthread stack cache size,
111   declared as:
112      static size_t stack_cache_actsize;
113   in nptl/allocatestack.c */
114SizeT* VG_(client__stack_cache_actsize__addr) = 0;
115
116/*--------------------------------------------------------------------*/
117/*--- end                                                          ---*/
118/*--------------------------------------------------------------------*/
119