How to deal with SIGSEGV in MariaDB?

Question

linux

There is such a program:

#include <iostream>
#include "include/mysql.h"
#include <Poco/Data/Session.h>
#include <Poco/Data/SQLite/Connector.h>
#include "include/Server.h"
#include "src/DBConnector.cpp"

void show_error(MYSQL *mysql)
{
    printf("Error(%d) [%s] \"%s\"", mysql_errno(mysql),
           mysql_sqlstate(mysql),
           mysql_error(mysql));
    mysql_close(mysql);
    exit(-1);
}

int main(int i,char* args[]){
    MYSQL *mysql;
    const char *query;

    mysql_debug("d:t:O");

    mysql= mysql_init(NULL);

    if (!mysql_real_connect(mysql, "localhost", "stats", "q1w2e3r4",
                            "example_db", 0, "/var/run/mysqld/mysqld.sock", 0))
        show_error(mysql);

    mysql_close(mysql);

    return 0;
}

When I try to run it, an error occurs:

Program received signal SIGSEGV, Segmentation fault.
__strcmp_ssse3 () at ../sysdeps/x86_64/multiarch/../strcmp.S:173
173	../sysdeps/x86_64/multiarch/../strcmp.S: Нет такого файла или каталога.

Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.

However, this code was copied from an example that works without crashes. What could be the problem?

Answer 1

The problem is that you are not reading the error.
173 ../sysdeps/x86_64/multiarch/../strcmp.S: No such file or directory.

Answer 2

Run the program under a debugger and see exactly where the crash occurs.