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
|
/* Test that the GET_PC macro is consistent with the unwinder.
Copyright (C) 2019-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, see <https://www.gnu.org/licenses/>. */
/* This test searches for the value of the GET_PC macro in the
addresses obtained from the backtrace function. */
#include <array_length.h>
#include <execinfo.h>
#include <inttypes.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <support/check.h>
#include <support/xsignal.h>
#include <sigcontextinfo.h>
static bool handler_called;
static void
handler (int signal, siginfo_t *info, void *ctx)
{
TEST_COMPARE (signal, SIGUSR1);
uintptr_t pc = sigcontext_get_pc (ctx);
printf ("info: address in signal handler: 0x%" PRIxPTR "\n", pc);
void *callstack[10];
int callstack_count = backtrace (callstack, array_length (callstack));
TEST_VERIFY_EXIT (callstack_count > 0);
TEST_VERIFY_EXIT (callstack_count <= array_length (callstack));
bool found = false;
for (int i = 0; i < callstack_count; ++i)
{
const char *marker;
if ((uintptr_t) callstack[i] == pc)
{
found = true;
marker = " *";
}
else
marker = "";
printf ("info: call stack entry %d: 0x%" PRIxPTR "%s\n",
i, (uintptr_t) callstack[i], marker);
}
TEST_VERIFY (found);
handler_called = true;
}
static int
do_test (void)
{
struct sigaction sa =
{
.sa_sigaction = &handler,
.sa_flags = SA_SIGINFO
};
xsigaction (SIGUSR1, &sa, NULL);
raise (SIGUSR1);
TEST_VERIFY (handler_called);
return 0;
}
#include <support/test-driver.c>
|
