xref: /third_party/musl/libc-test/src/functionalext/backtrace/unittest_backtrace.c

/**
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * 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 <execinfo.h>
#include <stdlib.h>
#include <string.h>
#include "functionalext.h"

#define ZERO_LENGTH 0
#define INVALID_LENGTH (-1)
#define VALID_LENGTH 1
#define ZERO_RESULT 0
#define BT_BUF_SIZE 100
#define SUCCESS_RESULT 1
#define FAILURE_RESULT 0

int checkString(char **bt_strings, int bt_size)
{
    for (int i = 0; i < bt_size; ++i) {
        char *str = bt_strings[i];
        char *left = strstr(str, "<");
        char *right = strstr(str, ">");
        if (left == NULL || right == NULL || left >= right) {
            continue;
        }
        int flag = 0;
        for (; left < right; left++) {
            if (*left == '?') {
                flag = 1;
                break;
            }
        }
        if (!flag) {
            continue;
        }
        right = strstr(str, "/");
        char *lastPtr = str + strlen(str);
        if (right == NULL) {
            continue;
        }
        for (; right != lastPtr; ++right) {
            if (*right != '?') {
                continue;
            }
        }
        return FAILURE_RESULT;
    }
    return SUCCESS_RESULT;
}

void backtrace_1001()
{
    void *frames[10];
    EXPECT_EQ("backtrace_1001", ZERO_RESULT, backtrace(frames, ZERO_LENGTH));
}

int backtrace_1002_supplement()
{
    void *frames[10];
    return backtrace(frames, VALID_LENGTH);
}

void backtrace_1002()
{
    EXPECT_LT("backtrace_1002", 0, backtrace_1002_supplement());
}

void backtrace_1003()
{
    void *bt_buffer[BT_BUF_SIZE];
    int bt_size = backtrace(bt_buffer, BT_BUF_SIZE);
    char **bt_strings = backtrace_symbols(bt_buffer, bt_size);
    EXPECT_PTRNE("backtrace_1003", bt_strings, NULL);
    EXPECT_TRUE("backtrace_1003_checkString", checkString(bt_strings, bt_size));
    free(bt_strings);
}

int main()
{
    backtrace_1001();
    backtrace_1002();
    backtrace_1003();
    return t_status;
}