1 files changed, 144 insertions, 0 deletions
diff --git a/tests/plugin/bb.c b/tests/plugin/bb.c
new file mode 100644
index 000000000..7d470a101
--- /dev/null
+++ b/tests/plugin/bb.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
+ *
+ * License: GNU GPL, version 2 or later.
+ *   See the COPYING file in the top-level directory.
+ */
+#include <inttypes.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <glib.h>
+
+#include <qemu-plugin.h>
+
+QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION;
+
+typedef struct {
+    GMutex lock;
+    int index;
+    uint64_t bb_count;
+    uint64_t insn_count;
+} CPUCount;
+
+/* Used by the inline & linux-user counts */
+static bool do_inline;
+static CPUCount inline_count;
+
+/* Dump running CPU total on idle? */
+static bool idle_report;
+static GPtrArray *counts;
+static int max_cpus;
+
+static void gen_one_cpu_report(CPUCount *count, GString *report)
+{
+    if (count->bb_count) {
+        g_string_append_printf(report, "CPU%d: "
+                               "bb's: %" PRIu64", insns: %" PRIu64 "\n",
+                               count->index,
+                               count->bb_count, count->insn_count);
+    }
+}
+
+static void plugin_exit(qemu_plugin_id_t id, void *p)
+{
+    g_autoptr(GString) report = g_string_new("");
+
+    if (do_inline || !max_cpus) {
+        g_string_printf(report, "bb's: %" PRIu64", insns: %" PRIu64 "\n",
+                        inline_count.bb_count, inline_count.insn_count);
+    } else {
+        g_ptr_array_foreach(counts, (GFunc) gen_one_cpu_report, report);
+    }
+    qemu_plugin_outs(report->str);
+}
+
+static void vcpu_idle(qemu_plugin_id_t id, unsigned int cpu_index)
+{
+    CPUCount *count = g_ptr_array_index(counts, cpu_index);
+    g_autoptr(GString) report = g_string_new("");
+    gen_one_cpu_report(count, report);
+
+    if (report->len > 0) {
+        g_string_prepend(report, "Idling ");
+        qemu_plugin_outs(report->str);
+    }
+}
+
+static void vcpu_tb_exec(unsigned int cpu_index, void *udata)
+{
+    CPUCount *count = max_cpus ?
+        g_ptr_array_index(counts, cpu_index) : &inline_count;
+
+    uintptr_t n_insns = (uintptr_t)udata;
+    g_mutex_lock(&count->lock);
+    count->insn_count += n_insns;
+    count->bb_count++;
+    g_mutex_unlock(&count->lock);
+}
+
+static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
+{
+    size_t n_insns = qemu_plugin_tb_n_insns(tb);
+
+    if (do_inline) {
+        qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64,
+                                                 &inline_count.bb_count, 1);
+        qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64,
+                                                 &inline_count.insn_count,
+                                                 n_insns);
+    } else {
+        qemu_plugin_register_vcpu_tb_exec_cb(tb, vcpu_tb_exec,
+                                             QEMU_PLUGIN_CB_NO_REGS,
+                                             (void *)n_insns);
+    }
+}
+
+QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
+                                           const qemu_info_t *info,
+                                           int argc, char **argv)
+{
+    int i;
+
+    for (i = 0; i < argc; i++) {
+        char *opt = argv[i];
+        g_autofree char **tokens = g_strsplit(opt, "=", 2);
+        if (g_strcmp0(tokens[0], "inline") == 0) {
+            if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_inline)) {
+                fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
+                return -1;
+            }
+        } else if (g_strcmp0(tokens[0], "idle") == 0) {
+            if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &idle_report)) {
+                fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
+                return -1;
+            }
+        } else {
+            fprintf(stderr, "option parsing failed: %s\n", opt);
+            return -1;
+        }
+    }
+
+    if (info->system_emulation && !do_inline) {
+        max_cpus = info->system.max_vcpus;
+        counts = g_ptr_array_new();
+        for (i = 0; i < max_cpus; i++) {
+            CPUCount *count = g_new0(CPUCount, 1);
+            g_mutex_init(&count->lock);
+            count->index = i;
+            g_ptr_array_add(counts, count);
+        }
+    } else if (!do_inline) {
+        g_mutex_init(&inline_count.lock);
+    }
+
+    if (idle_report) {
+        qemu_plugin_register_vcpu_idle_cb(id, vcpu_idle);
+    }
+
+    qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
+    qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
+    return 0;
+}