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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) 2000-2015 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. */
50 Addr  VG_(clstk_start_base)  = 0;
51 /* Initial highest address of the stack segment of the main thread. */
52 Addr  VG_(clstk_end)   = 0;
53 UWord VG_(clstk_id)    = 0;
54 /* Maximum size of the main thread's client stack. */
55 SizeT VG_(clstk_max_size) = 0;
56 
57 /* Solaris and Linux only, specifies where the client auxv is.
58 
59    This is set up as part of setup_client_stack() in
60    initimg-{linux,solaris}.c. */
61 UWord* VG_(client_auxv) = NULL;
62 
63 Addr  VG_(brk_base)    = 0;       /* start of brk */
64 Addr  VG_(brk_limit)   = 0;       /* current brk */
65 
66 /* A fd which refers to the client executable. */
67 Int VG_(cl_exec_fd) = -1;
68 
69 /* A fd which refers to the fake /proc/<pid>/cmdline in /tmp. */
70 Int VG_(cl_cmdline_fd) = -1;
71 
72 /* A fd which refers to the fake /proc/<pid>/auxv in /tmp. */
73 Int VG_(cl_auxv_fd) = -1;
74 
75 #if defined(VGO_solaris)
76 /* A fd which refers to the fake /proc/<pid>/psinfo in /tmp. */
77 Int VG_(cl_psinfo_fd) = -1;
78 #endif /* VGO_solaris */
79 
80 // Command line pieces, after they have been extracted from argv in
81 // m_main.main().  The payload vectors are allocated in VG_AR_CORE
82 // (the default arena).  They are never freed.
83 
84 /* Args for the client. */
85 XArray* /* of HChar* */ VG_(args_for_client) = NULL;
86 
87 /* Args for V (augments, then those from the launcher). */
88 XArray* /* of HChar* */ VG_(args_for_valgrind) = NULL;
89 
90 /* How many of the above not to pass on at execve time? */
91 Int VG_(args_for_valgrind_noexecpass) = 0;
92 
93 /* The name of the client executable, as specified on the command
94    line. */
95 const HChar* VG_(args_the_exename) = NULL;
96 
97 // Client's original rlimit data and rlimit stack
98 struct vki_rlimit VG_(client_rlimit_data);
99 struct vki_rlimit VG_(client_rlimit_stack);
100 
101 // Name of the launcher, as extracted from VALGRIND_LAUNCHER at
102 // startup.
103 HChar* VG_(name_of_launcher) = NULL;
104 
105 /* Application-visible file descriptor limits */
106 Int VG_(fd_soft_limit) = -1;
107 Int VG_(fd_hard_limit) = -1;
108 
109 /* Useful addresses extracted from the client */
110 /* Where is the __libc_freeres_wrapper routine we made? */
111 Addr VG_(client___libc_freeres_wrapper) = 0;
112 
113 /* x86-linux only: where is glibc's _dl_sysinfo_int80 function?
114    Finding it isn't essential, but knowing where it is does sometimes
115    help produce better back traces.  See big comment in
116    VG_(get_StackTrace) in m_stacktrace.c for further info. */
117 Addr VG_(client__dl_sysinfo_int80) = 0;
118 
119 /* Address of the (internal) glibc nptl pthread stack cache size,
120    declared as:
121       static size_t stack_cache_actsize;
122    in nptl/allocatestack.c */
123 SizeT* VG_(client__stack_cache_actsize__addr) = 0;
124 
125 #if defined(VGO_solaris)
126 /* Address of variable vg_vfork_fildes in vgpreload_core.so.0
127    (vg_preloaded.c). */
128 Int* VG_(vfork_fildes_addr) = 0;
129 #endif
130 
131 /*--------------------------------------------------------------------*/
132 /*--- end                                                          ---*/
133 /*--------------------------------------------------------------------*/
134