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fd67aa11 | 1 | /* Copyright (C) 2021-2024 Free Software Foundation, Inc. |
bb368aad VM |
2 | Contributed by Oracle. |
3 | ||
4 | This file is part of GNU Binutils. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
20 | ||
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <dlfcn.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
26 | #include "stopwatch.h" | |
27 | ||
28 | ||
29 | #define DYNSOROUTINE "so_cputime" | |
30 | #define DYNSONAME "./so_syn.so" | |
31 | ||
32 | /* callso -- dynamically link a shared object, and call a routine in it */ | |
33 | ||
34 | #ifndef NONSHARED | |
35 | ||
36 | static void *so_object = NULL; | |
37 | static void closeso (void); | |
38 | ||
39 | int | |
40 | callso (int k) | |
41 | { | |
42 | int i; | |
43 | char buf[1024]; | |
44 | char *p; | |
45 | char *q = DYNSONAME; | |
46 | int errnum; | |
47 | ||
48 | hrtime_t start = gethrtime (); | |
49 | hrtime_t vstart = gethrvtime (); | |
50 | ||
51 | /* Log the event */ | |
52 | wlog ("start of callso", NULL); | |
53 | ||
54 | /* see if already linked */ | |
55 | if (so_object != NULL) | |
56 | { | |
57 | fprintf (stderr, "Execution error -- callso: so_object already linked\n"); | |
58 | return 0; | |
59 | } | |
60 | ||
61 | /* open the dynamic shared object */ | |
62 | so_object = NULL; | |
63 | while (so_object == NULL) | |
64 | { | |
65 | so_object = dlopen (DYNSONAME, RTLD_NOW); | |
66 | if (so_object != NULL) | |
67 | break; | |
68 | p = dlerror (); | |
69 | if (q == NULL) | |
70 | q = "DYNSONAME"; | |
71 | if (p == NULL) | |
72 | p = "dlerror() returns NULL"; | |
73 | errnum = errno; | |
74 | if (errnum == EINTR) | |
75 | continue; /* retry */ | |
76 | else | |
77 | { | |
78 | fprintf (stderr, "Execution error -- callso: dlopen of %s failed--%s, errno=%d (%s)\n", | |
79 | q, p, errnum, strerror (errnum)); | |
80 | return (0); | |
81 | } | |
82 | } | |
83 | ||
84 | /* look up the routine name in it */ | |
85 | int (*so_routine)() = (int (*)())dlsym (so_object, DYNSOROUTINE); | |
86 | if (so_routine == NULL) | |
87 | { | |
88 | fprintf (stderr, "Execution error -- callso: dlsym %s not found\n", | |
89 | DYNSOROUTINE); | |
90 | return (0); | |
91 | } | |
92 | ||
93 | /* invoke the routine */ | |
94 | long long count = 0; | |
95 | do | |
96 | { | |
97 | i = (*so_routine)(); | |
98 | count++; | |
99 | } | |
100 | while (start + testtime * 1e9 > gethrtime ()); | |
101 | ||
102 | closeso (); | |
103 | sprintf (buf, "end of callso, %s returned %d", DYNSOROUTINE, i); | |
104 | wlog (buf, NULL); | |
105 | fprintf (stderr, " Performed %lld while-loop iterations\n", count); | |
106 | whrvlog ((gethrtime () - start), (gethrvtime () - vstart), "callso", NULL); | |
107 | return 0; | |
108 | } | |
109 | ||
110 | /* closeso -- close a DSO */ | |
111 | void | |
112 | closeso (void) | |
113 | { | |
114 | /* Log the event */ | |
115 | wlog ("start of closeso", NULL); | |
116 | ||
117 | /* ensure already linked */ | |
118 | if (so_object == NULL) | |
119 | { | |
120 | fprintf (stderr, "Execution error -- closeso: so_object not linked\n"); | |
121 | return; | |
122 | } | |
123 | ||
124 | /* close the dynamic shared object */ | |
125 | int rc = dlclose (so_object); | |
126 | if (rc != 0) | |
127 | { | |
128 | fprintf (stderr, "Execution error -- closeso: dlclose() failed--%s\n", | |
129 | dlerror ()); | |
130 | return; | |
131 | } | |
132 | ||
133 | /* clear the pointer */ | |
134 | so_object = NULL; | |
135 | wlog ("end of closeso", NULL); | |
136 | return; | |
137 | } | |
138 | ||
139 | #else /* NONSHARED */ | |
140 | ||
141 | int | |
142 | callso (int i) | |
143 | { | |
144 | return 0; | |
145 | } | |
146 | ||
147 | void | |
148 | closeso (void) | |
149 | { | |
150 | return; | |
151 | } | |
152 | #endif /* NONSHARED */ |