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
|
/*--------------------------------------------------------------------*/
/*--- Profiling machinery. #include this file into a tool to ---*/
/*--- enable --profile=yes, but not for release versions of tools, ---*/
/*--- because it uses glibc code. ---*/
/*--- vg_profile.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, an extensible x86 protected-mode
emulator for monitoring program execution on x86-Unixes.
Copyright (C) 2000-2004 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.
*/
#ifndef __VG_PROFILE_C
#define __VG_PROFILE_C
#include "tool.h"
/* get rid of these, if possible */
#include <signal.h>
#include <sys/time.h>
/* Override the empty definitions from tool.h */
#undef VGP_PUSHCC
#undef VGP_POPCC
#define VGP_PUSHCC(x) if (VG_(clo_profile)) VGP_(pushcc)(x)
#define VGP_POPCC(x) if (VG_(clo_profile)) VGP_(popcc)(x)
#define VGP_M_STACK 20
#define VGP_MAX_CCS 50
/* All zeroed initially because they're static */
static Int vgp_nticks;
static Int vgp_counts [VGP_MAX_CCS];
static Int vgp_entries[VGP_MAX_CCS];
static Char* vgp_names [VGP_MAX_CCS];
static Int vgp_sp;
static UInt vgp_stack[VGP_M_STACK];
/* These definitions override the panicking ones in vg_profile.c */
void VGP_(register_profile_event) ( Int n, Char* name )
{
/* Adjust for negative values */
n += VgpUnc;
if (n >= VGP_MAX_CCS) {
VG_(printf)("\nProfile event #%d higher than VGP_MAX_CCS of %d.\n"
"If you really need this many profile events, increase\n"
"VGP_MAX_CCS and recompile Valgrind.\n",
n, VGP_MAX_CCS);
VG_(skin_panic)("profile event too high");
}
if (vgp_names[n] != NULL) {
VG_(printf)("\nProfile event #%d being registered as `%s'\n"
"already registered as `%s'.\n"
"Note that tool and core event numbers must not overlap.\n",
n, name, vgp_names[n]);
VG_(skin_panic)("profile event already registered");
}
vgp_names[n] = name;
}
void VGP_(tick) ( int sigNo )
{
Int cc;
vgp_nticks++;
cc = vgp_stack[vgp_sp];
sk_assert(cc >= 0 && cc < VGP_MAX_CCS);
vgp_counts[ cc ]++;
}
void VGP_(init_profiling) ( void )
{
struct itimerval value;
Int ret;
/* Register core events... tricky macro definition causes
VGP_(register_profile_event)() to be called once for each core event
in VGP_CORE_LIST. */
sk_assert(VgpUnc == 0);
# define VGP_PAIR(n,name) VGP_(register_profile_event)(n,name)
VGP_CORE_LIST;
# undef VGP_PAIR
vgp_sp = -1;
VGP_(pushcc) ( VgpUnc );
value.it_interval.tv_sec = 0;
value.it_interval.tv_usec = 10 * 1000;
value.it_value = value.it_interval;
signal(SIGPROF, VGP_(tick) );
ret = setitimer(ITIMER_PROF, &value, NULL);
if (ret != 0) VG_(skin_panic)("vgp_init_profiling");
}
void VGP_(done_profiling) ( void )
{
Int i;
VG_(printf)("\nProfiling done, %d ticks\n", vgp_nticks);
for (i = 0; i < VGP_MAX_CCS; i++)
if (NULL != vgp_names[i])
VG_(printf)(
"%2d: %4d (%3d %%%%) ticks, %10d entries for %s\n",
i, vgp_counts[i],
(Int)(1000.0 * (double)vgp_counts[i] / (double)vgp_nticks),
vgp_entries[i], vgp_names[i] );
}
void VGP_(pushcc) ( UInt cc )
{
if (vgp_sp >= VGP_M_STACK-1) {
VG_(printf)(
"\nMaximum profile stack depth (%d) reached for event #%d (`%s').\n"
"This is probably due to a VGP_(pushcc)() without a matching\n"
"VGP_(popcc)(). Make sure they all match.\n"
"Or if you are nesting profiling events very deeply, increase\n"
"VGP_M_STACK and recompile Valgrind.\n",
VGP_M_STACK, cc, vgp_names[cc]);
VG_(skin_panic)("Profiling stack overflow");
}
vgp_sp++;
vgp_stack[vgp_sp] = cc;
vgp_entries[ cc ] ++;
}
void VGP_(popcc) ( UInt cc )
{
if (vgp_sp <= 0) {
VG_(printf)(
"\nProfile stack underflow. This is due to a VGP_(popcc)() without\n"
"a matching VGP_(pushcc)(). Make sure they all match.\n");
VG_(skin_panic)("Profiling stack underflow");
}
if (vgp_stack[vgp_sp] != cc) {
Int i;
VG_(printf)("popping %s, stack looks like:\n", vgp_names[cc]);
for (i = vgp_sp; i >= 0; i--)
VG_(printf)("%2d: %s\n", i, vgp_names[vgp_stack[i]]);
VG_(exit)(1);
}
vgp_sp--;
}
#endif /* __VG_PROFILE_C */
/*--------------------------------------------------------------------*/
/*--- end vg_profile.c ---*/
/*--------------------------------------------------------------------*/
|
