1 /*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <libunwind.h>
18 #include <signal.h>
19 #include <stdio.h>
20
21 #include "backtrace_testlib.h"
22
test_loop_forever()23 void test_loop_forever() {
24 while (1)
25 ;
26 }
27
test_signal_handler(int)28 void test_signal_handler(int) { test_loop_forever(); }
29
test_signal_action(int,siginfo_t *,void *)30 void test_signal_action(int, siginfo_t*, void*) { test_loop_forever(); }
31
test_level_four(int one,int two,int three,int four,void (* callback_func)(void *),void * data)32 int test_level_four(int one, int two, int three, int four, void (*callback_func)(void*),
33 void* data) {
34 if (callback_func != NULL) {
35 callback_func(data);
36 } else {
37 while (1)
38 ;
39 }
40 return one + two + three + four;
41 }
42
test_level_three(int one,int two,int three,int four,void (* callback_func)(void *),void * data)43 int test_level_three(int one, int two, int three, int four, void (*callback_func)(void*),
44 void* data) {
45 return test_level_four(one + 3, two + 6, three + 9, four + 12, callback_func, data) + 3;
46 }
47
test_level_two(int one,int two,int three,int four,void (* callback_func)(void *),void * data)48 int test_level_two(int one, int two, int three, int four, void (*callback_func)(void*), void* data) {
49 return test_level_three(one + 2, two + 4, three + 6, four + 8, callback_func, data) + 2;
50 }
51
test_level_one(int one,int two,int three,int four,void (* callback_func)(void *),void * data)52 int test_level_one(int one, int two, int three, int four, void (*callback_func)(void*), void* data) {
53 return test_level_two(one + 1, two + 2, three + 3, four + 4, callback_func, data) + 1;
54 }
55
test_recursive_call(int level,void (* callback_func)(void *),void * data)56 int test_recursive_call(int level, void (*callback_func)(void*), void* data) {
57 if (level > 0) {
58 return test_recursive_call(level - 1, callback_func, data) + level;
59 } else if (callback_func != NULL) {
60 callback_func(data);
61 } else {
62 while (1) {
63 }
64 }
65 return 0;
66 }
67
68 typedef struct {
69 unw_context_t* unw_context;
70 volatile int* exit_flag;
71 } GetContextArg;
72
GetContextAndExit(void * data)73 static void GetContextAndExit(void* data) {
74 GetContextArg* arg = (GetContextArg*)data;
75 unw_getcontext(arg->unw_context);
76 // Don't touch the stack anymore.
77 while (*arg->exit_flag == 0) {
78 }
79 }
80
test_get_context_and_wait(unw_context_t * unw_context,volatile int * exit_flag)81 void test_get_context_and_wait(unw_context_t* unw_context, volatile int* exit_flag) {
82 GetContextArg arg;
83 arg.unw_context = unw_context;
84 arg.exit_flag = exit_flag;
85 test_level_one(1, 2, 3, 4, GetContextAndExit, &arg);
86 }
87