When you try to visit beyond the end of a list, the qobject input visitor crashes, and the string visitor screws returns garbage. The generated list visits never go beyond the list end, but manual visits could. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <1488544368-30622-27-git-send-email-armbru@redhat.com>
349 lines
11 KiB
C
349 lines
11 KiB
C
/*
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* Options Visitor unit-tests.
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*
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* Copyright (C) 2013 Red Hat, Inc.
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*
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* Authors:
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* Laszlo Ersek <lersek@redhat.com> (based on test-string-output-visitor)
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qemu/config-file.h" /* qemu_add_opts() */
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#include "qemu/option.h" /* qemu_opts_parse() */
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#include "qapi/error.h"
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#include "qapi/opts-visitor.h" /* opts_visitor_new() */
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#include "test-qapi-visit.h" /* visit_type_UserDefOptions() */
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static QemuOptsList userdef_opts = {
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.name = "userdef",
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.head = QTAILQ_HEAD_INITIALIZER(userdef_opts.head),
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.desc = { { 0 } } /* validated with OptsVisitor */
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};
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/* fixture (= glib test case context) and test case manipulation */
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typedef struct OptsVisitorFixture {
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UserDefOptions *userdef;
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Error *err;
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} OptsVisitorFixture;
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static void
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setup_fixture(OptsVisitorFixture *f, gconstpointer test_data)
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{
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const char *opts_string = test_data;
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QemuOpts *opts;
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Visitor *v;
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opts = qemu_opts_parse(qemu_find_opts("userdef"), opts_string, false,
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NULL);
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g_assert(opts != NULL);
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v = opts_visitor_new(opts);
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visit_type_UserDefOptions(v, NULL, &f->userdef, &f->err);
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visit_free(v);
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qemu_opts_del(opts);
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}
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static void
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teardown_fixture(OptsVisitorFixture *f, gconstpointer test_data)
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{
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qapi_free_UserDefOptions(f->userdef);
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error_free(f->err);
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}
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static void
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add_test(const char *testpath,
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void (*test_func)(OptsVisitorFixture *f, gconstpointer test_data),
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gconstpointer test_data)
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{
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g_test_add(testpath, OptsVisitorFixture, test_data, setup_fixture,
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test_func, teardown_fixture);
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}
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/* test output evaluation */
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static void
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expect_ok(OptsVisitorFixture *f, gconstpointer test_data)
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{
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g_assert(f->err == NULL);
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g_assert(f->userdef != NULL);
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}
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static void
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expect_fail(OptsVisitorFixture *f, gconstpointer test_data)
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{
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g_assert(f->err != NULL);
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/* The error message is printed when this test utility is invoked directly
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* (ie. without gtester) and the --verbose flag is passed:
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*
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* tests/test-opts-visitor --verbose
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*/
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g_test_message("'%s': %s", (const char *)test_data,
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error_get_pretty(f->err));
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}
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static void
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test_value(OptsVisitorFixture *f, gconstpointer test_data)
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{
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uint64_t magic, bitval;
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intList *i64;
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uint64List *u64;
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uint16List *u16;
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expect_ok(f, test_data);
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magic = 0;
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for (i64 = f->userdef->i64; i64 != NULL; i64 = i64->next) {
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g_assert(-16 <= i64->value && i64->value < 64-16);
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bitval = 1ull << (i64->value + 16);
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g_assert((magic & bitval) == 0);
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magic |= bitval;
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}
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g_assert(magic == 0xDEADBEEF);
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magic = 0;
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for (u64 = f->userdef->u64; u64 != NULL; u64 = u64->next) {
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g_assert(u64->value < 64);
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bitval = 1ull << u64->value;
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g_assert((magic & bitval) == 0);
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magic |= bitval;
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}
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g_assert(magic == 0xBADC0FFEE0DDF00DULL);
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magic = 0;
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for (u16 = f->userdef->u16; u16 != NULL; u16 = u16->next) {
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g_assert(u16->value < 64);
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bitval = 1ull << u16->value;
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g_assert((magic & bitval) == 0);
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magic |= bitval;
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}
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g_assert(magic == 0xD15EA5E);
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}
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static void
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expect_i64_min(OptsVisitorFixture *f, gconstpointer test_data)
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{
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expect_ok(f, test_data);
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g_assert(f->userdef->has_i64);
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g_assert(f->userdef->i64->next == NULL);
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g_assert(f->userdef->i64->value == INT64_MIN);
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}
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static void
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expect_i64_max(OptsVisitorFixture *f, gconstpointer test_data)
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{
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expect_ok(f, test_data);
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g_assert(f->userdef->has_i64);
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g_assert(f->userdef->i64->next == NULL);
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g_assert(f->userdef->i64->value == INT64_MAX);
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}
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static void
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expect_zero(OptsVisitorFixture *f, gconstpointer test_data)
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{
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expect_ok(f, test_data);
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g_assert(f->userdef->has_u64);
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g_assert(f->userdef->u64->next == NULL);
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g_assert(f->userdef->u64->value == 0);
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}
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static void
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expect_u64_max(OptsVisitorFixture *f, gconstpointer test_data)
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{
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expect_ok(f, test_data);
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g_assert(f->userdef->has_u64);
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g_assert(f->userdef->u64->next == NULL);
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g_assert(f->userdef->u64->value == UINT64_MAX);
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}
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/* test cases */
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static void
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test_opts_range_unvisited(void)
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{
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intList *list = NULL;
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intList *tail;
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QemuOpts *opts;
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Visitor *v;
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opts = qemu_opts_parse(qemu_find_opts("userdef"), "ilist=0-2", false,
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&error_abort);
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v = opts_visitor_new(opts);
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visit_start_struct(v, NULL, NULL, 0, &error_abort);
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/* Would be simpler if the visitor genuinely supported virtual walks */
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visit_start_list(v, "ilist", (GenericList **)&list, sizeof(*list),
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&error_abort);
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tail = list;
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visit_type_int(v, NULL, &tail->value, &error_abort);
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g_assert_cmpint(tail->value, ==, 0);
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tail = (intList *)visit_next_list(v, (GenericList *)tail, sizeof(*list));
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g_assert(tail);
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visit_type_int(v, NULL, &tail->value, &error_abort);
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g_assert_cmpint(tail->value, ==, 1);
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tail = (intList *)visit_next_list(v, (GenericList *)tail, sizeof(*list));
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g_assert(tail);
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visit_check_list(v, &error_abort); /* BUG: unvisited tail not reported */
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visit_end_list(v, (void **)&list);
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visit_check_struct(v, &error_abort);
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visit_end_struct(v, NULL);
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qapi_free_intList(list);
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visit_free(v);
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qemu_opts_del(opts);
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}
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static void
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test_opts_range_beyond(void)
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{
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Error *err = NULL;
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intList *list = NULL;
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intList *tail;
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QemuOpts *opts;
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Visitor *v;
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int64_t val;
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opts = qemu_opts_parse(qemu_find_opts("userdef"), "ilist=0", false,
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&error_abort);
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v = opts_visitor_new(opts);
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visit_start_struct(v, NULL, NULL, 0, &error_abort);
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/* Would be simpler if the visitor genuinely supported virtual walks */
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visit_start_list(v, "ilist", (GenericList **)&list, sizeof(*list),
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&error_abort);
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tail = list;
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visit_type_int(v, NULL, &tail->value, &error_abort);
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g_assert_cmpint(tail->value, ==, 0);
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tail = (intList *)visit_next_list(v, (GenericList *)tail, sizeof(*tail));
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g_assert(!tail);
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visit_type_int(v, NULL, &val, &err);
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error_free_or_abort(&err);
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visit_end_list(v, (void **)&list);
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visit_check_struct(v, &error_abort);
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visit_end_struct(v, NULL);
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qapi_free_intList(list);
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visit_free(v);
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qemu_opts_del(opts);
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}
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int
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main(int argc, char **argv)
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{
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g_test_init(&argc, &argv, NULL);
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qemu_add_opts(&userdef_opts);
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/* Three hexadecimal magic numbers, "dead beef", "bad coffee, odd food" and
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* "disease", from
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* <http://en.wikipedia.org/wiki/Magic_number_%28programming%29>, were
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* converted to binary and dissected into bit ranges. Each magic number is
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* going to be recomposed using the lists called "i64", "u64" and "u16",
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* respectively.
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*
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* (Note that these types pertain to the individual bit shift counts, not
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* the magic numbers themselves; the intent is to exercise opts_type_int()
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* and opts_type_uint64().)
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*
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* The "i64" shift counts have been decreased by 16 (decimal) in order to
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* test negative values as well. Finally, the full list of QemuOpt elements
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* has been permuted with "shuf".
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*
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* Both "i64" and "u64" have some (distinct) single-element ranges
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* represented as both "a" and "a-a". "u16" is a special case of "i64" (see
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* visit_type_uint16()), so it wouldn't add a separate test in this regard.
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*/
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add_test("/visitor/opts/flatten/value", &test_value,
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"i64=-1-0,u64=12-16,u64=2-3,i64=-11--9,u64=57,u16=9,i64=5-5,"
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"u16=1-4,u16=20,u64=63-63,i64=-16--13,u64=50-52,i64=14-15,u16=11,"
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"i64=7,u16=18,i64=2-3,u16=6,u64=54-55,u64=0,u64=18-20,u64=33-43,"
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"i64=9-12,u16=26-27,u64=59-61,u16=13-16,u64=29-31,u64=22-23,"
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"u16=24,i64=-7--3");
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add_test("/visitor/opts/i64/val1/errno", &expect_fail,
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"i64=0x8000000000000000");
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add_test("/visitor/opts/i64/val1/empty", &expect_fail, "i64=");
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add_test("/visitor/opts/i64/val1/trailing", &expect_fail, "i64=5z");
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add_test("/visitor/opts/i64/nonlist", &expect_fail, "i64x=5-6");
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add_test("/visitor/opts/i64/val2/errno", &expect_fail,
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"i64=0x7fffffffffffffff-0x8000000000000000");
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add_test("/visitor/opts/i64/val2/empty", &expect_fail, "i64=5-");
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add_test("/visitor/opts/i64/val2/trailing", &expect_fail, "i64=5-6z");
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add_test("/visitor/opts/i64/range/empty", &expect_fail, "i64=6-5");
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add_test("/visitor/opts/i64/range/minval", &expect_i64_min,
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"i64=-0x8000000000000000--0x8000000000000000");
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add_test("/visitor/opts/i64/range/maxval", &expect_i64_max,
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"i64=0x7fffffffffffffff-0x7fffffffffffffff");
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add_test("/visitor/opts/u64/val1/errno", &expect_fail, "u64=-1");
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add_test("/visitor/opts/u64/val1/empty", &expect_fail, "u64=");
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add_test("/visitor/opts/u64/val1/trailing", &expect_fail, "u64=5z");
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add_test("/visitor/opts/u64/nonlist", &expect_fail, "u64x=5-6");
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add_test("/visitor/opts/u64/val2/errno", &expect_fail,
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"u64=0xffffffffffffffff-0x10000000000000000");
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add_test("/visitor/opts/u64/val2/empty", &expect_fail, "u64=5-");
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add_test("/visitor/opts/u64/val2/trailing", &expect_fail, "u64=5-6z");
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add_test("/visitor/opts/u64/range/empty", &expect_fail, "u64=6-5");
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add_test("/visitor/opts/u64/range/minval", &expect_zero, "u64=0-0");
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add_test("/visitor/opts/u64/range/maxval", &expect_u64_max,
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"u64=0xffffffffffffffff-0xffffffffffffffff");
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/* Test maximum range sizes. The macro value is open-coded here
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* *intentionally*; the test case must use concrete values by design. If
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* OPTS_VISITOR_RANGE_MAX is changed, the following values need to be
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* recalculated as well. The assert and this comment should help with it.
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*/
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g_assert(OPTS_VISITOR_RANGE_MAX == 65536);
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/* The unsigned case is simple, a u64-u64 difference can always be
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* represented as a u64.
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*/
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add_test("/visitor/opts/u64/range/max", &expect_ok, "u64=0-65535");
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add_test("/visitor/opts/u64/range/2big", &expect_fail, "u64=0-65536");
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/* The same cannot be said about an i64-i64 difference. */
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add_test("/visitor/opts/i64/range/max/pos/a", &expect_ok,
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"i64=0x7fffffffffff0000-0x7fffffffffffffff");
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add_test("/visitor/opts/i64/range/max/pos/b", &expect_ok,
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"i64=0x7ffffffffffeffff-0x7ffffffffffffffe");
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add_test("/visitor/opts/i64/range/2big/pos", &expect_fail,
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"i64=0x7ffffffffffeffff-0x7fffffffffffffff");
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add_test("/visitor/opts/i64/range/max/neg/a", &expect_ok,
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"i64=-0x8000000000000000--0x7fffffffffff0001");
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add_test("/visitor/opts/i64/range/max/neg/b", &expect_ok,
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"i64=-0x7fffffffffffffff--0x7fffffffffff0000");
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add_test("/visitor/opts/i64/range/2big/neg", &expect_fail,
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"i64=-0x8000000000000000--0x7fffffffffff0000");
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add_test("/visitor/opts/i64/range/2big/full", &expect_fail,
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"i64=-0x8000000000000000-0x7fffffffffffffff");
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g_test_add_func("/visitor/opts/range/unvisited",
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test_opts_range_unvisited);
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g_test_add_func("/visitor/opts/range/beyond",
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test_opts_range_beyond);
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g_test_run();
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return 0;
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}
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