1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
/*--------------------------------------------------------------------*/
/*--- Command line handling. m_commandline.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2013 Julian Seward
jseward@acm.org
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
*/
#include "pub_core_basics.h"
#include "pub_core_vki.h"
#include "pub_core_libcassert.h"
#include "pub_core_libcbase.h"
#include "pub_core_libcfile.h"
#include "pub_core_libcprint.h"
#include "pub_core_libcproc.h"
#include "pub_core_mallocfree.h"
#include "pub_core_xarray.h"
#include "pub_core_clientstate.h"
#include "pub_core_commandline.h" /* self */
/* Add a string to an expandable array of strings. */
static void add_string ( XArray* /* of HChar* */xa, HChar* str )
{
(void) VG_(addToXA)( xa, (void*)(&str) );
}
/* Read the contents of .valgrindrc in 'dir' into malloc'd memory. */
// Note that we deliberately don't free the malloc'd memory. See
// comment at call site.
static HChar* read_dot_valgrindrc ( const HChar* dir )
{
Int n;
SysRes fd;
struct vg_stat stat_buf;
HChar* f_clo = NULL;
const HChar dot_valgrindrc[] = ".valgrindrc";
vg_assert(dir != NULL);
HChar filename[VG_(strlen)(dir) + 1 + VG_(strlen)(dot_valgrindrc) + 1];
VG_(sprintf)(filename, "%s/%s", dir, dot_valgrindrc);
fd = VG_(open)(filename, 0, VKI_S_IRUSR);
if ( !sr_isError(fd) ) {
Int res = VG_(fstat)( sr_Res(fd), &stat_buf );
// Ignore if not owned by current user or world writeable (CVE-2008-4865)
if (!res && stat_buf.uid == VG_(geteuid)()
&& (!(stat_buf.mode & VKI_S_IWOTH))) {
if ( stat_buf.size > 0 ) {
f_clo = VG_(malloc)("commandline.rdv.1", stat_buf.size+1);
n = VG_(read)(sr_Res(fd), f_clo, stat_buf.size);
if (n == -1) n = 0;
vg_assert(n >= 0 && n <= stat_buf.size+1);
f_clo[n] = '\0';
}
}
else
VG_(message)(Vg_UserMsg,
"%s was not read as it is either world writeable or not "
"owned by the current user\n", filename);
VG_(close)(sr_Res(fd));
}
return f_clo;
}
// Add args from a string into VG_(args_for_valgrind), splitting the
// string at whitespace and adding each component as a separate arg.
static void add_args_from_string ( HChar* s )
{
HChar* tmp;
HChar* cp = s;
vg_assert(cp);
while (True) {
// We have alternating sequences: blanks, non-blanks, blanks...
// copy the non-blanks sequences, and add terminating '\0'
while (VG_(isspace)(*cp)) cp++;
if (*cp == 0) break;
tmp = cp;
while ( !VG_(isspace)(*cp) && *cp != 0 ) cp++;
if ( *cp != 0 ) *cp++ = '\0'; // terminate if not the last
add_string( VG_(args_for_valgrind), tmp );
}
}
/* Split up the args presented by the launcher to m_main.main(), and
park them in VG_(args_for_client) and VG_(args_for_valgrind).
The resulting arg list is the concatenation of the following:
- contents of ~/.valgrindrc
- contents of $VALGRIND_OPTS
- contents of ./.valgrindrc
- args from the command line
in the stated order.
VG_(args_for_valgrind_noexecpass) is set to be the number of items
in the first three categories. They are not passed to child invokations
at exec, whereas the last group is.
If the last group contains --command-line-only=yes, then the
first three groups are left empty.
Scheme: first examine the last group (the supplied argc/argv).
It should look like this.
args-for-v exe_name args-for-c
args-for-v are taken until either they don't start with '-' or
a "--" is seen.
The exe name and args-for-c are recorded without further ado.
Note that args-for-c[0] is the first real arg for the client, not
its executable name.
args-for-v are then copied into tmp_xarray.
if args-for-v does not include --command-line-only=yes:
contents of ~/.valgrindrc, $VALGRIND_OPTS and ./.valgrindrc
are copied into VG_(args_for_valgrind).
else
VG_(args_for_valgrind) is made empty.
Finally, tmp_xarray is copied onto the end of VG_(args_for_valgrind).
*/
void VG_(split_up_argv)( Int argc, HChar** argv )
{
Int i;
Bool augment = True;
static Bool already_called = False;
XArray* /* of HChar* */ tmp_xarray;
/* This function should be called once, at startup, and then never
again. */
vg_assert(!already_called);
already_called = True;
tmp_xarray = VG_(newXA)( VG_(malloc), "commandline.sua.1",
VG_(free), sizeof(HChar*) );
vg_assert( ! VG_(args_for_valgrind) );
VG_(args_for_valgrind)
= VG_(newXA)( VG_(malloc), "commandline.sua.2",
VG_(free), sizeof(HChar*) );
vg_assert( ! VG_(args_for_client) );
VG_(args_for_client)
= VG_(newXA)( VG_(malloc), "commandline.sua.3",
VG_(free), sizeof(HChar*) );
/* Collect up the args-for-V. */
i = 1; /* skip the exe (stage2) name. */
for (; i < argc; i++) {
vg_assert(argv[i]);
if (0 == VG_(strcmp)(argv[i], "--")) {
i++;
break;
}
if (0 == VG_(strcmp)(argv[i], "--command-line-only=yes"))
augment = False;
if (argv[i][0] != '-')
break;
add_string( tmp_xarray, argv[i] );
}
/* Should now be looking at the exe name. */
if (i < argc) {
vg_assert(argv[i]);
VG_(args_the_exename) = argv[i];
i++;
}
/* The rest are args for the client. */
for (; i < argc; i++) {
vg_assert(argv[i]);
add_string( VG_(args_for_client), argv[i] );
}
/* Get extra args from ~/.valgrindrc, $VALGRIND_OPTS and
./.valgrindrc into VG_(args_for_valgrind). */
if (augment) {
// read_dot_valgrindrc() allocates the return value with
// VG_(malloc)(). We do not free f1_clo and f2_clo as they get
// put into VG_(args_for_valgrind) and so must persist.
HChar* home = VG_(getenv)("HOME");
HChar* f1_clo = home ? read_dot_valgrindrc( home ) : NULL;
HChar* env_clo = VG_(strdup)( "commandline.sua.4",
VG_(getenv)(VALGRIND_OPTS) );
HChar* f2_clo = NULL;
// Don't read ./.valgrindrc if "." is the same as "$HOME", else its
// contents will be applied twice. (bug #142488)
if (home) {
const HChar *cwd = VG_(get_startup_wd)();
f2_clo = ( VG_STREQ(home, cwd)
? NULL : read_dot_valgrindrc(".") );
}
if (f1_clo) add_args_from_string( f1_clo );
if (env_clo) add_args_from_string( env_clo );
if (f2_clo) add_args_from_string( f2_clo );
}
/* .. and record how many extras we got. */
VG_(args_for_valgrind_noexecpass)
= VG_(sizeXA)( VG_(args_for_valgrind) );
/* Finally, copy tmp_xarray onto the end. */
for (i = 0; i < VG_(sizeXA)( tmp_xarray ); i++)
add_string( VG_(args_for_valgrind),
* (HChar**)VG_(indexXA)( tmp_xarray, i ) );
VG_(deleteXA)( tmp_xarray );
}
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/
|
