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. */
51Addr  VG_(clstk_start_base)  = 0;
52/* Initial highest address of the stack segment of the main thread. */
53Addr  VG_(clstk_end)   = 0;
54UWord VG_(clstk_id)    = NULL_STK_ID;
55/* Maximum size of the main thread's client stack. */
56SizeT 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. */
62UWord* VG_(client_auxv) = NULL;
63
64Addr  VG_(brk_base)    = 0;       /* start of brk */
65Addr  VG_(brk_limit)   = 0;       /* current brk */
66
67/* A fd which refers to the client executable. */
68Int VG_(cl_exec_fd) = -1;
69
70/* A fd which refers to the fake /proc/<pid>/cmdline in /tmp. */
71Int VG_(cl_cmdline_fd) = -1;
72
73/* A fd which refers to the fake /proc/<pid>/auxv in /tmp. */
74Int VG_(cl_auxv_fd) = -1;
75
76#if defined(VGO_solaris)
77/* A fd which refers to the fake /proc/<pid>/psinfo in /tmp. */
78Int 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. */
86XArray* /* of HChar* */ VG_(args_for_client) = NULL;
87
88/* Args for V (augments, then those from the launcher). */
89XArray* /* of HChar* */ VG_(args_for_valgrind) = NULL;
90
91/* How many of the above not to pass on at execve time? */
92Int VG_(args_for_valgrind_noexecpass) = 0;
93
94/* The name of the client executable, as specified on the command
95   line. */
96const HChar* VG_(args_the_exename) = NULL;
97
98// Client's original rlimit data and rlimit stack
99struct vki_rlimit VG_(client_rlimit_data);
100struct vki_rlimit VG_(client_rlimit_stack);
101
102// Name of the launcher, as extracted from VALGRIND_LAUNCHER at
103// startup.
104HChar* VG_(name_of_launcher) = NULL;
105
106/* Application-visible file descriptor limits */
107Int VG_(fd_soft_limit) = -1;
108Int VG_(fd_hard_limit) = -1;
109
110/* Useful addresses extracted from the client. */
111/* Where is the freeres_wrapper routine we made? */
112Addr 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. */
118Addr 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 */
124SizeT* 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). */
129Int* VG_(vfork_fildes_addr) = 0;
130#endif
131
132/*--------------------------------------------------------------------*/
133/*--- end                                                          ---*/
134/*--------------------------------------------------------------------*/
135