blob: 6a7766ef1e26fbf1b0c2d256067dea9b94f99c82 (
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
|
/*
* Copyright (C) 2020 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 <signal.h>
#include <stdlib.h>
#include "profile-extras.h"
extern "C" {
static sighandler_t chained_signal_handler = SIG_ERR;
#ifndef __CONTINUOUS_COVERAGE_MODE__
int __llvm_profile_write_file(void);
#endif // __CONTINUOUS_COVERAGE_MODE__
static void llvm_signal_handler(__unused int signum) {
// TODO(pirama) Only disable __llvm_profile_write_file call to begin with.
// After continuous mode is stable, stop registering the signal handler.
#ifndef __CONTINUOUS_COVERAGE_MODE__
__llvm_profile_write_file();
#endif // __CONTINUOUS_COVERAGE_MODE__
if (chained_signal_handler != SIG_ERR && chained_signal_handler != SIG_IGN &&
chained_signal_handler != SIG_DFL) {
(chained_signal_handler)(signum);
}
}
// Initialize libprofile-extras:
//
// - Install a signal handler that triggers __llvm_profile_write_file on
// <COVERAGE_FLUSH_SIGNAL>.
//
// We want this initializer to run during load time. In addition to marking
// this function as a constructor, we link this library with `--whole-archive`
// to force this function to be included in the output.
static __attribute__((constructor)) int init_profile_extras(void) {
if (chained_signal_handler != SIG_ERR) {
return -1;
}
sighandler_t ret1 = signal(COVERAGE_FLUSH_SIGNAL, llvm_signal_handler);
if (ret1 == SIG_ERR) {
return -1;
}
chained_signal_handler = ret1;
return 0;
}
}
|
