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-rw-r--r--tests/tcg/plugins/mem.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/tests/tcg/plugins/mem.c b/tests/tcg/plugins/mem.c
new file mode 100644
index 0000000000..b650dddcce
--- /dev/null
+++ b/tests/tcg/plugins/mem.c
@@ -0,0 +1,139 @@
+/*
+ * 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 {
+    uint64_t mem_count;
+    uint64_t io_count;
+} CPUCount;
+
+static struct qemu_plugin_scoreboard *counts;
+static qemu_plugin_u64 mem_count;
+static qemu_plugin_u64 io_count;
+static bool do_inline, do_callback;
+static bool do_haddr;
+static enum qemu_plugin_mem_rw rw = QEMU_PLUGIN_MEM_RW;
+
+static void plugin_exit(qemu_plugin_id_t id, void *p)
+{
+    g_autoptr(GString) out = g_string_new("");
+
+    if (do_inline || do_callback) {
+        g_string_printf(out, "mem accesses: %" PRIu64 "\n",
+                        qemu_plugin_u64_sum(mem_count));
+    }
+    if (do_haddr) {
+        g_string_append_printf(out, "io accesses: %" PRIu64 "\n",
+                               qemu_plugin_u64_sum(io_count));
+    }
+    qemu_plugin_outs(out->str);
+    qemu_plugin_scoreboard_free(counts);
+}
+
+static void vcpu_mem(unsigned int cpu_index, qemu_plugin_meminfo_t meminfo,
+                     uint64_t vaddr, void *udata)
+{
+    if (do_haddr) {
+        struct qemu_plugin_hwaddr *hwaddr;
+        hwaddr = qemu_plugin_get_hwaddr(meminfo, vaddr);
+        if (qemu_plugin_hwaddr_is_io(hwaddr)) {
+            qemu_plugin_u64_add(io_count, cpu_index, 1);
+        } else {
+            qemu_plugin_u64_add(mem_count, cpu_index, 1);
+        }
+    } else {
+        qemu_plugin_u64_add(mem_count, cpu_index, 1);
+    }
+}
+
+static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
+{
+    size_t n = qemu_plugin_tb_n_insns(tb);
+    size_t i;
+
+    for (i = 0; i < n; i++) {
+        struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, i);
+
+        if (do_inline) {
+            qemu_plugin_register_vcpu_mem_inline_per_vcpu(
+                insn, rw,
+                QEMU_PLUGIN_INLINE_ADD_U64,
+                mem_count, 1);
+        }
+        if (do_callback) {
+            qemu_plugin_register_vcpu_mem_cb(insn, vcpu_mem,
+                                             QEMU_PLUGIN_CB_NO_REGS,
+                                             rw, NULL);
+        }
+    }
+}
+
+QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
+                                           const qemu_info_t *info,
+                                           int argc, char **argv)
+{
+
+    for (int i = 0; i < argc; i++) {
+        char *opt = argv[i];
+        g_auto(GStrv) tokens = g_strsplit(opt, "=", 2);
+
+        if (g_strcmp0(tokens[0], "haddr") == 0) {
+            if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_haddr)) {
+                fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
+                return -1;
+            }
+        } else if (g_strcmp0(tokens[0], "track") == 0) {
+            if (g_strcmp0(tokens[1], "r") == 0) {
+                rw = QEMU_PLUGIN_MEM_R;
+            } else if (g_strcmp0(tokens[1], "w") == 0) {
+                rw = QEMU_PLUGIN_MEM_W;
+            } else if (g_strcmp0(tokens[1], "rw") == 0) {
+                rw = QEMU_PLUGIN_MEM_RW;
+            } else {
+                fprintf(stderr, "invalid value for argument track: %s\n", opt);
+                return -1;
+            }
+        } else 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], "callback") == 0) {
+            if (!qemu_plugin_bool_parse(tokens[0], tokens[1], &do_callback)) {
+                fprintf(stderr, "boolean argument parsing failed: %s\n", opt);
+                return -1;
+            }
+        } else {
+            fprintf(stderr, "option parsing failed: %s\n", opt);
+            return -1;
+        }
+    }
+
+    if (do_inline && do_callback) {
+        fprintf(stderr,
+                "can't enable inline and callback counting at the same time\n");
+        return -1;
+    }
+
+    counts = qemu_plugin_scoreboard_new(sizeof(CPUCount));
+    mem_count = qemu_plugin_scoreboard_u64_in_struct(
+        counts, CPUCount, mem_count);
+    io_count = qemu_plugin_scoreboard_u64_in_struct(counts, CPUCount, io_count);
+    qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
+    qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
+    return 0;
+}