mirror of https://github.com/sqlite/sqlite
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
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/*
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** This module interfaces SQLite to the Google OSS-Fuzz, fuzzer as a service.
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** (https://github.com/google/oss-fuzz)
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include "sqlite3.h"
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/*
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** Progress handler callback
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*/
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static int progress_handler(void *pReturn) {
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return *(int*)pReturn;
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}
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/*
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** Callback for sqlite3_exec().
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*/
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static int exec_handler(void *pCnt, int argc, char **argv, char **namev){
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int i;
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for(i=0; i<argc; i++) sqlite3_free(sqlite3_mprintf("%s", argv[i]));
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return ((*(int*)pCnt)--)<=0;
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}
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/*
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** Main entry point. The fuzzer invokes this function with each
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** fuzzed input.
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*/
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int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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int progressArg = 0; /* 1 causes progress handler abort */
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int execCnt = 0; /* Abort row callback when count reaches zero */
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char *zErrMsg = 0; /* Error message returned by sqlite_exec() */
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sqlite3 *db; /* The database connection */
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uint8_t uSelector; /* First byte of input data[] */
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int rc; /* Return code from various interfaces */
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char *zSql; /* Zero-terminated copy of data[] */
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if( size<3 ) return 0; /* Early out if unsufficient data */
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/* Extract the selector byte from the beginning of the input. But only
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** do this if the second byte is a \n. If the second byte is not \n,
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** then use a default selector */
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if( data[1]=='\n' ){
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uSelector = data[0]; data += 2; size -= 2;
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}else{
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uSelector = 0xfd;
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}
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/* Open the database connection. Only use an in-memory database. */
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rc = sqlite3_open_v2("fuzz.db", &db,
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SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_MEMORY, 0);
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if( rc ) return 0;
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/* Bit 0 of the selector enables progress callbacks. Bit 1 is the
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** return code from progress callbacks */
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if( uSelector & 1 ){
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sqlite3_progress_handler(db, 4, progress_handler, (void*)&progressArg);
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}
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uSelector >>= 1;
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progressArg = uSelector & 1; uSelector >>= 1;
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/* Bit 2 of the selector enables foreign key constraints */
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sqlite3_db_config(db, SQLITE_DBCONFIG_ENABLE_FKEY, uSelector&1, &rc);
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uSelector >>= 1;
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/* Remaining bits of the selector determine a limit on the number of
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** output rows */
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execCnt = uSelector + 1;
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/* Run the SQL. The sqlite_exec() interface expects a zero-terminated
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** string, so make a copy. */
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zSql = sqlite3_mprintf("%.*s", (int)size, data);
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sqlite3_exec(db, zSql, exec_handler, (void*)&execCnt, &zErrMsg);
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/* Cleanup and return */
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sqlite3_free(zErrMsg);
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sqlite3_free(zSql);
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sqlite3_close(db);
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return 0;
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}
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