test case for the crash. addresses #129

git-svn-id: file:///svn/tokudb@975 c7de825b-a66e-492c-adef-691d508d4ae1

src/tests/test_unused_memory_crash.c

+/* -*- mode: C; c-basic-offset: 4 -*- */
+#ident "Copyright (c) 2007 Tokutek Inc.  All rights reserved."
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <unistd.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include <sys/stat.h>
+#include <db.h>
+
+#include "test.h"
+
+DBT *dbt_init(DBT *dbt, void *data, u_int32_t size) {
+    memset(dbt, 0, sizeof *dbt);
+    dbt->data = data;
+    dbt->size = size;
+    return dbt;
+}
+
+DBT *dbt_init_malloc(DBT *dbt) {
+    memset(dbt, 0, sizeof *dbt);
+    dbt->flags = DB_DBT_MALLOC;
+    return dbt;
+}
+
+void expect_cursor_get(DBC *cursor, int k, int v, int op) {
+    int kk, vv;
+    DBT key, val;
+    int r = cursor->c_get(cursor, dbt_init_malloc(&key), dbt_init_malloc(&val), op);
+    assert(r == 0); 
+    assert(key.size == sizeof kk); memcpy(&kk, key.data, key.size); assert(kk == k); free(key.data); 
+    assert(val.size == sizeof vv); memcpy(&vv, val.data, val.size); assert(vv == v); free(val.data);
+}
+
+DBC *new_cursor(DB *db, int k, int v, int op) {
+    DBC *cursor;
+    int r;
+    r = db->cursor(db, 0, &cursor, 0); assert(r == 0);
+    expect_cursor_get(cursor, k, v, op);
+    return cursor;
+}
+
+int db_put(DB *db, int k, int v) {
+    DBT key, val;
+    int r = db->put(db, 0, dbt_init(&key, &k, sizeof k), dbt_init(&val, &v, sizeof v), 0);
+    return r;
+}
+
+void test_cursor_nonleaf_expand(int n, int reverse) {
+    if (verbose) printf("test_cursor_nonleaf_expand:%d %d\n", n, reverse);
+
+    DB_ENV * const null_env = 0;
+    DB *db;
+    DB_TXN * const null_txn = 0;
+    const char * const fname = DIR "/" "test.insert.brt";
+    int r;
+
+    // unlink(fname);
+
+    /* create the dup database file */
+    r = db_create(&db, null_env, 0); assert(r == 0);
+    r = db->set_pagesize(db, 4096); assert(r == 0);
+    r = db->open(db, null_txn, fname, "main", DB_BTREE, DB_CREATE, 0666); assert(r == 0);
+    
+    r = db_put(db, htonl(0), 0); assert(r == 0);
+    DBC *cursor0 = new_cursor(db, htonl(0), 0, DB_FIRST); assert(cursor0);
+    r = db_put(db, htonl(n), n); assert(r == 0);
+    DBC *cursorn = new_cursor(db, htonl(n), n, DB_LAST); assert(cursorn);
+
+    int i;
+    if (reverse) {
+        for (i=n-1; i > 0; i--) {
+            r = db_put(db, htonl(i), i); assert(r == 0);
+        }
+    } else {
+        for (i=1; i < n; i++) {
+            r = db_put(db, htonl(i), i); assert(r == 0);
+        } 
+    }
+
+    expect_cursor_get(cursor0, htonl(0), 0, DB_CURRENT);
+    expect_cursor_get(cursorn, htonl(n), n, DB_CURRENT);
+
+    r = cursor0->c_close(cursor0); assert(r == 0);
+    r = cursorn->c_close(cursorn); assert(r == 0);
+    r = db->close(db, 0); assert(r == 0);
+}
+
+int main(int argc, const char *argv[]) {
+    parse_args(argc, argv);
+
+    system("rm -rf " DIR);
+    int r=mkdir(DIR, 0777); assert(r==0);
+
+    int i;
+    for (i=1; i<=65536; i *= 2) {
+        test_cursor_nonleaf_expand(i, 0);
+        test_cursor_nonleaf_expand(i, 1);
+    }
+
+    return 0;
+}