blob: 55a9b991cae095df1fffe467d3ac48488f0558cb (
plain)
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
|
/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h> // For POSIX basename().
// Use _system_properties.h to use __system_property_wait_any()
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
#include "profile-extras.h"
extern "C" {
void __gcov_dump(void);
void __gcov_reset(void);
// storing SIG_ERR helps us detect (unlikely) looping.
static sighandler_t chained_gcov_signal_handler = SIG_ERR;
static void gcov_signal_handler(int signum) {
__gcov_dump();
__gcov_reset();
if (chained_gcov_signal_handler != SIG_ERR &&
chained_gcov_signal_handler != SIG_IGN &&
chained_gcov_signal_handler != SIG_DFL) {
(chained_gcov_signal_handler)(signum);
}
}
__attribute__((weak)) int init_profile_extras_once = 0;
// Initialize libprofile-extras:
// - Install a signal handler that triggers __gcov_flush on <COVERAGE_FLUSH_SIGNAL>.
//
// We want this initiazlier to run during load time.
//
// Just marking init_profile_extras() with __attribute__((constructor)) isn't
// enough since the linker drops it from its output since no other symbol from
// this static library is referenced.
//
// We force the linker to include init_profile_extras() by passing
// '-uinit_profile_extras' to the linker (in build/soong).
__attribute__((constructor)) int init_profile_extras(void) {
if (init_profile_extras_once)
return 0;
init_profile_extras_once = 1;
// is this instance already registered?
if (chained_gcov_signal_handler != SIG_ERR) {
return -1;
}
sighandler_t ret1 = signal(COVERAGE_FLUSH_SIGNAL, gcov_signal_handler);
if (ret1 == SIG_ERR) {
return -1;
}
chained_gcov_signal_handler = ret1;
return 0;
}
}
|
