diff options
Diffstat (limited to 'tests/qtest/fuzz/qos_fuzz.c')
| -rw-r--r-- | tests/qtest/fuzz/qos_fuzz.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/tests/qtest/fuzz/qos_fuzz.c b/tests/qtest/fuzz/qos_fuzz.c new file mode 100644 index 0000000000..bbb17470ff --- /dev/null +++ b/tests/qtest/fuzz/qos_fuzz.c @@ -0,0 +1,234 @@ +/* + * QOS-assisted fuzzing helpers + * + * Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2 as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/> + */ + +#include "qemu/osdep.h" +#include "qemu/units.h" +#include "qapi/error.h" +#include "qemu-common.h" +#include "exec/memory.h" +#include "exec/address-spaces.h" +#include "sysemu/sysemu.h" +#include "qemu/main-loop.h" + +#include "tests/qtest/libqtest.h" +#include "tests/qtest/libqos/malloc.h" +#include "tests/qtest/libqos/qgraph.h" +#include "tests/qtest/libqos/qgraph_internal.h" +#include "tests/qtest/libqos/qos_external.h" + +#include "fuzz.h" +#include "qos_fuzz.h" + +#include "qapi/qapi-commands-machine.h" +#include "qapi/qapi-commands-qom.h" +#include "qapi/qmp/qlist.h" + + +void *fuzz_qos_obj; +QGuestAllocator *fuzz_qos_alloc; + +static const char *fuzz_target_name; +static char **fuzz_path_vec; + +/* + * Replaced the qmp commands with direct qmp_marshal calls. + * Probably there is a better way to do this + */ +static void qos_set_machines_devices_available(void) +{ + QDict *req = qdict_new(); + QObject *response; + QDict *args = qdict_new(); + QList *lst; + Error *err = NULL; + + qmp_marshal_query_machines(NULL, &response, &err); + assert(!err); + lst = qobject_to(QList, response); + apply_to_qlist(lst, true); + + qobject_unref(response); + + + qdict_put_str(req, "execute", "qom-list-types"); + qdict_put_str(args, "implements", "device"); + qdict_put_bool(args, "abstract", true); + qdict_put_obj(req, "arguments", (QObject *) args); + + qmp_marshal_qom_list_types(args, &response, &err); + assert(!err); + lst = qobject_to(QList, response); + apply_to_qlist(lst, false); + qobject_unref(response); + qobject_unref(req); +} + +static char **current_path; + +void *qos_allocate_objects(QTestState *qts, QGuestAllocator **p_alloc) +{ + return allocate_objects(qts, current_path + 1, p_alloc); +} + +static const char *qos_build_main_args(void) +{ + char **path = fuzz_path_vec; + QOSGraphNode *test_node; + GString *cmd_line = g_string_new(path[0]); + void *test_arg; + + if (!path) { + fprintf(stderr, "QOS Path not found\n"); + abort(); + } + + /* Before test */ + current_path = path; + test_node = qos_graph_get_node(path[(g_strv_length(path) - 1)]); + test_arg = test_node->u.test.arg; + if (test_node->u.test.before) { + test_arg = test_node->u.test.before(cmd_line, test_arg); + } + /* Prepend the arguments that we need */ + g_string_prepend(cmd_line, + TARGET_NAME " -display none -machine accel=qtest -m 64 "); + return cmd_line->str; +} + +/* + * This function is largely a copy of qos-test.c:walk_path. Since walk_path + * is itself a callback, its a little annoying to add another argument/layer of + * indirection + */ +static void walk_path(QOSGraphNode *orig_path, int len) +{ + QOSGraphNode *path; + QOSGraphEdge *edge; + + /* etype set to QEDGE_CONSUMED_BY so that machine can add to the command line */ + QOSEdgeType etype = QEDGE_CONSUMED_BY; + + /* twice QOS_PATH_MAX_ELEMENT_SIZE since each edge can have its arg */ + char **path_vec = g_new0(char *, (QOS_PATH_MAX_ELEMENT_SIZE * 2)); + int path_vec_size = 0; + + char *after_cmd, *before_cmd, *after_device; + GString *after_device_str = g_string_new(""); + char *node_name = orig_path->name, *path_str; + + GString *cmd_line = g_string_new(""); + GString *cmd_line2 = g_string_new(""); + + path = qos_graph_get_node(node_name); /* root */ + node_name = qos_graph_edge_get_dest(path->path_edge); /* machine name */ + + path_vec[path_vec_size++] = node_name; + path_vec[path_vec_size++] = qos_get_machine_type(node_name); + + for (;;) { + path = qos_graph_get_node(node_name); + if (!path->path_edge) { + break; + } + + node_name = qos_graph_edge_get_dest(path->path_edge); + + /* append node command line + previous edge command line */ + if (path->command_line && etype == QEDGE_CONSUMED_BY) { + g_string_append(cmd_line, path->command_line); + g_string_append(cmd_line, after_device_str->str); + g_string_truncate(after_device_str, 0); + } + + path_vec[path_vec_size++] = qos_graph_edge_get_name(path->path_edge); + /* detect if edge has command line args */ + after_cmd = qos_graph_edge_get_after_cmd_line(path->path_edge); + after_device = qos_graph_edge_get_extra_device_opts(path->path_edge); + before_cmd = qos_graph_edge_get_before_cmd_line(path->path_edge); + edge = qos_graph_get_edge(path->name, node_name); + etype = qos_graph_edge_get_type(edge); + + if (before_cmd) { + g_string_append(cmd_line, before_cmd); + } + if (after_cmd) { + g_string_append(cmd_line2, after_cmd); + } + if (after_device) { + g_string_append(after_device_str, after_device); + } + } + + path_vec[path_vec_size++] = NULL; + g_string_append(cmd_line, after_device_str->str); + g_string_free(after_device_str, true); + + g_string_append(cmd_line, cmd_line2->str); + g_string_free(cmd_line2, true); + + /* + * here position 0 has <arch>/<machine>, position 1 has <machine>. + * The path must not have the <arch>, qtest_add_data_func adds it. + */ + path_str = g_strjoinv("/", path_vec + 1); + + /* Check that this is the test we care about: */ + char *test_name = strrchr(path_str, '/') + 1; + if (strcmp(test_name, fuzz_target_name) == 0) { + /* + * put arch/machine in position 1 so run_one_test can do its work + * and add the command line at position 0. + */ + path_vec[1] = path_vec[0]; + path_vec[0] = g_string_free(cmd_line, false); + + fuzz_path_vec = path_vec; + } else { + g_free(path_vec); + } + + g_free(path_str); +} + +static const char *qos_get_cmdline(FuzzTarget *t) +{ + /* + * Set a global variable that we use to identify the qos_path for our + * fuzz_target + */ + fuzz_target_name = t->name; + qos_set_machines_devices_available(); + qos_graph_foreach_test_path(walk_path); + return qos_build_main_args(); +} + +void fuzz_add_qos_target( + FuzzTarget *fuzz_opts, + const char *interface, + QOSGraphTestOptions *opts + ) +{ + qos_add_test(fuzz_opts->name, interface, NULL, opts); + fuzz_opts->get_init_cmdline = qos_get_cmdline; + fuzz_add_target(fuzz_opts); +} + +void qos_init_path(QTestState *s) +{ + fuzz_qos_obj = qos_allocate_objects(s , &fuzz_qos_alloc); +} |