@@ -16,32 +16,120 @@
QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
+typedef struct {
+ int64_t num;
+ int64_t calls;
+ int64_t errors;
+} SyscallStats;
+
+static GMutex lock;
+static GHashTable *statistics;
+
+static SyscallStats *get_or_create_entry(int64_t num)
+{
+ SyscallStats *entry =
+ (SyscallStats *) g_hash_table_lookup(statistics, GINT_TO_POINTER(num));
+
+ if (!entry) {
+ entry = g_new0(SyscallStats, 1);
+ entry->num = num;
+ g_hash_table_insert(statistics, GINT_TO_POINTER(num), (gpointer) entry);
+ }
+
+ return entry;
+}
+
static void vcpu_syscall(qemu_plugin_id_t id, unsigned int vcpu_index,
int64_t num, uint64_t a1, uint64_t a2,
uint64_t a3, uint64_t a4, uint64_t a5,
uint64_t a6, uint64_t a7, uint64_t a8)
{
- g_autofree gchar *out = g_strdup_printf("syscall #%" PRIi64 "\n", num);
- qemu_plugin_outs(out);
+ if (statistics) {
+ SyscallStats *entry;
+ g_mutex_lock(&lock);
+ entry = get_or_create_entry(num);
+ entry->calls++;
+ g_mutex_unlock(&lock);
+ } else {
+ g_autofree gchar *out = g_strdup_printf("syscall #%" PRIi64 "\n", num);
+ qemu_plugin_outs(out);
+ }
}
static void vcpu_syscall_ret(qemu_plugin_id_t id, unsigned int vcpu_idx,
int64_t num, int64_t ret)
+{
+ if (statistics) {
+ SyscallStats *entry;
+
+ g_mutex_lock(&lock);
+ /* Should always return an existent entry. */
+ entry = get_or_create_entry(num);
+ if (ret < 0) {
+ entry->errors++;
+ }
+ g_mutex_unlock(&lock);
+ } else {
+ g_autofree gchar *out;
+ out = g_strdup_printf("syscall #%" PRIi64 " returned -> %" PRIi64 "\n",
+ num, ret);
+ qemu_plugin_outs(out);
+ }
+}
+
+static void print_entry(gpointer val, gpointer user_data)
{
g_autofree gchar *out;
- out = g_strdup_printf("syscall #%" PRIi64 " returned -> %" PRIi64 "\n",
- num, ret);
+ SyscallStats *entry = (SyscallStats *) val;
+ int64_t syscall_num = entry->num;
+ out = g_strdup_printf(
+ "%-13" PRIi64 "%-6" PRIi64 " %" PRIi64 "\n",
+ syscall_num, entry->calls, entry->errors);
qemu_plugin_outs(out);
}
+static gint comp_func(gconstpointer ea, gconstpointer eb)
+{
+ SyscallStats *ent_a = (SyscallStats *) ea;
+ SyscallStats *ent_b = (SyscallStats *) eb;
+
+ return ent_a->calls > ent_b->calls ? -1 : 1;
+}
+
/* ************************************************************************* */
+static void plugin_exit(qemu_plugin_id_t id, void *p)
+{
+ if (!statistics) {
+ return;
+ }
+
+ g_mutex_lock(&lock);
+ GList *entries = g_hash_table_get_values(statistics);
+ entries = g_list_sort(entries, comp_func);
+ qemu_plugin_outs("syscall no. calls errors\n");
-static void plugin_exit(qemu_plugin_id_t id, void *p) {}
+ g_list_foreach(entries, print_entry, NULL);
+
+ g_list_free(entries);
+ g_hash_table_destroy(statistics);
+ g_mutex_unlock(&lock);
+}
QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
const qemu_info_t *info,
int argc, char **argv)
{
+ if (argc == 0) {
+ statistics = g_hash_table_new_full(NULL, g_direct_equal, NULL, g_free);
+ } else {
+ for (int i = 0; i < argc; i++) {
+ if (g_strcmp0(argv[i], "print") != 0) {
+ fprintf(stderr, "unsupported argument: %s\n", argv[i]);
+ return -1;
+ }
+ }
+ }
+
qemu_plugin_register_vcpu_syscall_cb(id, vcpu_syscall);
qemu_plugin_register_vcpu_syscall_ret_cb(id, vcpu_syscall_ret);
qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);