1 /* Routines required for instrumenting a program. */
2 /* Compile this one with gcc. */
3 /* Copyright (C) 1989-2019 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
28 #if defined(inhibit_libc)
29 /* If libc and its header files are not available, provide dummy functions. */
31 #ifdef L_gcov_merge_add
32 void __gcov_merge_add (gcov_type
*counters
__attribute__ ((unused
)),
33 unsigned n_counters
__attribute__ ((unused
))) {}
36 #ifdef L_gcov_merge_single
37 void __gcov_merge_single (gcov_type
*counters
__attribute__ ((unused
)),
38 unsigned n_counters
__attribute__ ((unused
))) {}
43 #ifdef L_gcov_merge_add
44 /* The profile merging function that just adds the counters. It is given
45 an array COUNTERS of N_COUNTERS old counters and it reads the same number
46 of counters from the gcov file. */
48 __gcov_merge_add (gcov_type
*counters
, unsigned n_counters
)
50 for (; n_counters
; counters
++, n_counters
--)
51 *counters
+= gcov_get_counter ();
53 #endif /* L_gcov_merge_add */
55 #ifdef L_gcov_merge_ior
56 /* The profile merging function that just adds the counters. It is given
57 an array COUNTERS of N_COUNTERS old counters and it reads the same number
58 of counters from the gcov file. */
60 __gcov_merge_ior (gcov_type
*counters
, unsigned n_counters
)
62 for (; n_counters
; counters
++, n_counters
--)
63 *counters
|= gcov_get_counter_target ();
67 #ifdef L_gcov_merge_time_profile
68 /* Time profiles are merged so that minimum from all valid (greater than zero)
69 is stored. There could be a fork that creates new counters. To have
70 the profile stable, we chosen to pick the smallest function visit time. */
72 __gcov_merge_time_profile (gcov_type
*counters
, unsigned n_counters
)
77 for (i
= 0; i
< n_counters
; i
++)
79 value
= gcov_get_counter_target ();
81 if (value
&& (!counters
[i
] || value
< counters
[i
]))
85 #endif /* L_gcov_merge_time_profile */
87 #ifdef L_gcov_merge_single
90 merge_single_value_set (gcov_type
*counters
)
93 gcov_type value
, counter
;
95 /* First value is number of total executions of the profiler. */
96 gcov_type all
= gcov_get_counter_ignore_scaling (-1);
100 for (unsigned i
= 0; i
< GCOV_DISK_SINGLE_VALUES
; i
++)
102 value
= gcov_get_counter_target ();
103 counter
= gcov_get_counter_ignore_scaling (-1);
108 /* We can't return as we need to read all counters. */
111 else if (counter
== 0 || counters
[1] == -1)
113 /* We can't return as we need to read all counters. */
117 for (j
= 0; j
< GCOV_DISK_SINGLE_VALUES
; j
++)
119 if (counters
[2 * j
] == value
)
121 counters
[2 * j
+ 1] += counter
;
124 else if (counters
[2 * j
+ 1] == 0)
126 counters
[2 * j
] = value
;
127 counters
[2 * j
+ 1] = counter
;
132 /* We haven't found a free slot for the value, mark overflow. */
133 if (j
== GCOV_DISK_SINGLE_VALUES
)
138 /* The profile merging function for choosing the most common value.
139 It is given an array COUNTERS of N_COUNTERS old counters and it
140 reads the same number of counters from the gcov file. The counters
141 are split into pairs where the members of the tuple have
144 -- the stored candidate on the most common value of the measured entity
148 __gcov_merge_single (gcov_type
*counters
, unsigned n_counters
)
150 gcc_assert (!(n_counters
% GCOV_SINGLE_VALUE_COUNTERS
));
152 for (unsigned i
= 0; i
< (n_counters
/ GCOV_SINGLE_VALUE_COUNTERS
); i
++)
153 merge_single_value_set (counters
+ (i
* GCOV_SINGLE_VALUE_COUNTERS
));
155 #endif /* L_gcov_merge_single */
157 #endif /* inhibit_libc */