mirror of
https://github.com/tursodatabase/libsql.git
synced 2024-12-15 17:59:41 +00:00
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/*
|
|
** This program tests the ability of SQLite database to recover from a crash.
|
|
** This program runs under Unix only, but the results are applicable to all
|
|
** systems.
|
|
**
|
|
** The main process first constructs a test database, then starts creating
|
|
** subprocesses that write to that database. Each subprocess is killed off,
|
|
** without a chance to clean up its database connection, after a random
|
|
** delay. This killing of the subprocesses simulates a crash or power
|
|
** failure. The next subprocess to open the database should rollback
|
|
** whatever operation was in process at the time of the simulated crash.
|
|
**
|
|
** If any problems are encountered, an error is reported and the test stops.
|
|
** If no problems are seen after a large number of tests, we assume that
|
|
** the rollback mechanism is working.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sched.h>
|
|
#include "sqlite.h"
|
|
|
|
static void do_some_sql(int parent){
|
|
char *zErr;
|
|
int rc = SQLITE_OK;
|
|
sqlite *db;
|
|
int cnt = 0;
|
|
static char zBig[] =
|
|
"-abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
"-abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
|
|
|
|
if( access("./test.db-journal",0)==0 ){
|
|
/*printf("pid %d: journal exists. rollback will be required\n",getpid());*/ unlink("test.db-saved");
|
|
system("cp test.db test.db-saved");
|
|
unlink("test.db-journal-saved");
|
|
system("cp test.db-journal test.db-journal-saved");
|
|
}
|
|
db = sqlite_open("./test.db", 0, &zErr);
|
|
if( db==0 ){
|
|
printf("ERROR: %s\n", zErr);
|
|
if( strcmp(zErr,"database disk image is malformed")==0 ){
|
|
kill(parent, SIGKILL);
|
|
}
|
|
exit(1);
|
|
}
|
|
srand(getpid());
|
|
while( rc==SQLITE_OK ){
|
|
cnt++;
|
|
rc = sqlite_exec_printf(db,
|
|
"INSERT INTO t1 VALUES(%d,'%d%s')", 0, 0, &zErr,
|
|
rand(), rand(), zBig);
|
|
}
|
|
if( rc!=SQLITE_OK ){
|
|
printf("ERROR #%d: %s\n", rc, zErr);
|
|
if( rc==SQLITE_CORRUPT ){
|
|
kill(parent, SIGKILL);
|
|
}
|
|
}
|
|
printf("pid %d: cnt=%d\n", getpid(), cnt);
|
|
}
|
|
|
|
|
|
int main(int argc, char **argv){
|
|
int i;
|
|
sqlite *db;
|
|
char *zErr;
|
|
int status;
|
|
int parent = getpid();
|
|
|
|
unlink("test.db");
|
|
unlink("test.db-journal");
|
|
db = sqlite_open("test.db", 0, &zErr);
|
|
if( db==0 ){
|
|
printf("Cannot initialize: %s\n", zErr);
|
|
return 1;
|
|
}
|
|
sqlite_exec(db, "CREATE TABLE t1(a,b)", 0, 0, 0);
|
|
sqlite_close(db);
|
|
for(i=0; i<10000; i++){
|
|
int pid = fork();
|
|
if( pid==0 ){
|
|
sched_yield();
|
|
do_some_sql(parent);
|
|
return 0;
|
|
}
|
|
printf("test %d, pid=%d\n", i, pid);
|
|
usleep(rand()%10000 + 1000);
|
|
kill(pid, SIGKILL);
|
|
waitpid(pid, &status, 0);
|
|
}
|
|
return 0;
|
|
}
|