mirror of https://github.com/sysown/proxysql
René Cannaò
5 years ago
committed by
GitHub
commit
ebbd9845bd
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/**
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* @file reg_test_3546-stmt_empty_params-t.cpp
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* @brief This test is a regression test for exercising the code path that lead
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* to issue #3546. It's not meant to test a specific feature, but to server as
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* a regression test that should flag the issue under a memory analyzer.
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* @details Memory corruption related to #3546 was double-free provoqued when a
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* prepared statement with param of types ['MYSQL_TYPE_DATE'|'MYSQL_TYPE_TIMESTAMP'|'MYSQL_TYPE_DATETIME'|'MYSQL_TYPE_TIME'],
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* was prepared and a later prepared with 'NULL' parameters. Because the memory
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* for the buffered was not zeroed neither at initialization or during the later
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* `free` a corruption takes place during the second execution.
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*/
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#include <iostream>
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#include <chrono>
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#include <ctime>
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#include <cstring>
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#include <unistd.h>
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#include <time.h>
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#include <vector>
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#include <string>
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#include <stdio.h>
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#include <mysql.h>
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#include <mysql/mysqld_error.h>
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#include "proxysql_utils.h"
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#include "tap.h"
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#include "command_line.h"
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#include "utils.h"
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#include "errno.h"
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/**
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* @brief String size of the columns created for the testing table.
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*/
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const int STRING_SIZE=32;
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/**
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* @brief Number of iterations to perform.
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*/
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const uint32_t ITERATIONS = 100;
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/**
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* @brief Id for the current writer hostgroup.
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*/
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const uint32_t WRITER_HOSTGROUP_ID = 0;
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int prepare_stmt(
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MYSQL* proxysql_mysql, MYSQL_STMT* stmt, MYSQL_TIME* ts, my_bool* is_null
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) {
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int res = EXIT_SUCCESS;
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std::string query {
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"SELECT /*+ ;hostgroup=0 */ id,c1,c2 FROM test.reg_test_3546 WHERE date IN (?)"
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};
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if (mysql_stmt_prepare(stmt, query.c_str(), strlen(query.c_str()))) {
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diag("mysql_stmt_prepare at line %d failed: %s", __LINE__ , mysql_error(proxysql_mysql));
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mysql_close(proxysql_mysql);
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res = EXIT_FAILURE;
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goto exit;
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}
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MYSQL_BIND bind_params;
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memset(&bind_params, 0, sizeof(MYSQL_BIND));
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bind_params.buffer_type= MYSQL_TYPE_DATE;
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bind_params.buffer= ts;
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bind_params.is_null= is_null;
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bind_params.length= 0;
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if (mysql_stmt_bind_param(stmt, &bind_params)) {
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diag(
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"mysql_stmt_bind_result at line %d failed: %s", __LINE__ ,
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mysql_stmt_error(stmt)
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);
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res = EXIT_FAILURE;
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goto exit;
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}
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exit:
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return res;
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}
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int main(int argc, char** argv) {
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CommandLine cl;
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plan(ITERATIONS);
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if (cl.getEnv()) {
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diag("Failed to get the required environmental variables.");
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return -1;
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}
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MYSQL_STMT* stmt_param = nullptr;
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MYSQL* proxysql_mysql = mysql_init(NULL);
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MYSQL* proxysql_admin = mysql_init(NULL);
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if (!mysql_real_connect(proxysql_mysql, cl.host, cl.username, cl.password, NULL, cl.port, NULL, 0)) {
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fprintf(stderr, "File %s, line %d, Error: %s\n", __FILE__, __LINE__, mysql_error(proxysql_mysql));
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return -1;
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}
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if (!mysql_real_connect(proxysql_admin, cl.host, cl.admin_username, cl.admin_password, NULL, cl.admin_port, NULL, 0)) {
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fprintf(stderr, "File %s, line %d, Error: %s\n", __FILE__, __LINE__, mysql_error(proxysql_admin));
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return -1;
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}
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stmt_param = mysql_stmt_init(proxysql_mysql);
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if (!stmt_param) {
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diag("mysql_stmt_init(), out of memory");
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goto exit;
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}
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// Insert the row to be queried with the prepared statement.
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// *************************************************************************
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MYSQL_QUERY(proxysql_mysql, "CREATE DATABASE IF NOT EXISTS test");
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MYSQL_QUERY(proxysql_mysql, "DROP TABLE IF EXISTS test.reg_test_3546");
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MYSQL_QUERY(
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proxysql_mysql,
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"CREATE TABLE IF NOT EXISTS test.reg_test_3546"
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" (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, `c1` BIGINT, `c2` varchar(32), `date` DATE)"
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);
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MYSQL_QUERY(proxysql_mysql, "INSERT INTO test.reg_test_3546(c1, c2, date) VALUES (100, 'abcde', '2009-01-01')");
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mysql_close(proxysql_mysql);
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// *************************************************************************
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// Initialize the connection again
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proxysql_mysql = mysql_init(NULL);
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if (!mysql_real_connect(proxysql_mysql, cl.host, cl.username, cl.password, NULL, cl.port, NULL, 0)) {
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fprintf(stderr, "File %s, line %d, Error: %s\n", __FILE__, __LINE__, mysql_error(proxysql_mysql));
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return -1;
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}
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{
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// Set the number of maximum connections for servers in the writer hostgroup
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std::string t_update_mysql_servers {
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"UPDATE mysql_servers SET max_connections=1 WHERE hostgroup_id=%d"
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};
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std::string update_mysql_queries {};
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string_format(t_update_mysql_servers, update_mysql_queries, WRITER_HOSTGROUP_ID);
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MYSQL_QUERY(proxysql_admin, update_mysql_queries.c_str());
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MYSQL_QUERY(proxysql_admin, "LOAD MYSQL SERVERS TO RUNTIME");
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MYSQL_TIME ts;
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char data_param[STRING_SIZE] = {};
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my_bool is_null = 0;
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if (prepare_stmt(proxysql_mysql, stmt_param, &ts, &is_null)) {
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diag("'prepare_stmt' at line %d failed", __LINE__);
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goto exit;
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}
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// Prepare parameters
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ts.year = 2009;
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ts.month = 1;
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ts.day = 1;
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for (uint32_t i = 0; i < ITERATIONS; i++) {
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if (i % 2) {
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is_null = 0;
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} else {
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is_null = 1;
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}
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if (mysql_stmt_execute(stmt_param)) {
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diag(
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"'mysql_stmt_execute' at line %d failed: %s", __LINE__ ,
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mysql_stmt_error(stmt_param)
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);
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goto exit;
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}
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MYSQL_BIND bind[3];
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memset(bind, 0, sizeof(bind));
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int data_id = 0;
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int64_t data_c1 = 0;
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char data_c2[STRING_SIZE] { 0 };
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char is_null[3] { 0 };
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long unsigned int length[3] { 0 };
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char error[3] { 0 };
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bind[0].buffer_type = MYSQL_TYPE_LONG;
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bind[0].buffer = (char *)&data_id;
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bind[0].buffer_length = sizeof(int);
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bind[0].is_null = &is_null[0];
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bind[0].length = &length[0];
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bind[1].buffer_type = MYSQL_TYPE_LONGLONG;
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bind[1].buffer = (char *)&data_c1;
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bind[1].buffer_length = sizeof(int64_t);
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bind[1].is_null = &is_null[1];
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bind[1].length = &length[1];
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bind[2].buffer_type = MYSQL_TYPE_STRING;
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bind[2].buffer = (char *)&data_c2;
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bind[2].buffer_length = STRING_SIZE;
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bind[2].is_null = &is_null[2];
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bind[2].length = &length[2];
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bind[2].error = &error[2];
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if (mysql_stmt_bind_result(stmt_param, bind)) {
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diag(
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"mysql_stmt_bind_result at line %d failed: %s", __LINE__,
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mysql_stmt_error(stmt_param)
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);
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goto exit;
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}
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int fetch_result = mysql_stmt_fetch(stmt_param);
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if (fetch_result == 1) {
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diag(
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"mysql_stmt_fetch at line %d failed: %s", __LINE__,
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mysql_stmt_error(stmt_param)
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);
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goto exit;
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}
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if (i % 2) {
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bool data_match_expected =
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(data_id == static_cast<int64_t>(1)) &&
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(data_c1 == static_cast<int64_t>(100)) &&
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(strcmp(data_c2, "abcde") == 0);
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ok(
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data_match_expected,
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"Prepared statement SELECT result *SHOULD* match expected -"
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" Exp=(id:1, c1:100, c2:'abcde'), Act=(id:%d, c1:%ld, c2:'%s')",
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data_id,
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data_c1,
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data_c2
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);
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} else {
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bool data_match_expected =
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(data_id == static_cast<int64_t>(0)) &&
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(data_c1 == static_cast<int64_t>(0)) &&
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(strcmp(data_c2, "") == 0);
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ok(
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data_match_expected,
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"Prepared statement SELECT result *SHOULD* match expected -"
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" Exp=(id:0, c1:0, c2:''), Act=(id:%d, c1:%ld, c2:'%s')",
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data_id,
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data_c1,
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data_c2
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);
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}
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}
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}
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exit:
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if (stmt_param) { mysql_stmt_close(stmt_param); }
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mysql_close(proxysql_mysql);
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mysql_close(proxysql_admin);
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return exit_status();
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}
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