@@ -17,6 +17,7 @@ NAMES += hotblocks
NAMES += hotpages
NAMES += howvec
NAMES += lockstep
+NAMES += drcov
SONAMES := $(addsuffix .so,$(addprefix lib,$(NAMES)))
new file mode 100644
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2021, Ivanov Arkady <arkadiy.ivanov@ispras.ru>
+ *
+ * Drcov - a DynamoRIO-based tool that collects coverage information
+ * from a binary. Primary goal this script is to have coverage log
+ * files that work in Lighthouse.
+ *
+ * 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 <inttypes.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;
+
+static char header[] = "DRCOV VERSION: 2\n"
+ "DRCOV FLAVOR: drcov-64\n"
+ "Module Table: version 2, count 1\n"
+ "Columns: id, base, end, entry, path\n";
+
+static FILE *fp;
+static char *file_name = "file.drcov.trace";
+static GMutex lock;
+
+typedef struct {
+ uint32_t start;
+ uint16_t size;
+ uint16_t mod_id;
+ bool exec;
+} bb_entry_t;
+
+static GSList *bbs;
+
+static void printf_header(void)
+{
+ fprintf(fp, "%s", header);
+ const char *path = qemu_plugin_path_to_binary();
+ uint64_t start_code = qemu_plugin_start_code();
+ uint64_t end_code = qemu_plugin_end_code();
+ uint64_t entry = qemu_plugin_entry_code();
+ fprintf(fp, "0, 0x%lx, 0x%lx, 0x%lx, %s\n",
+ start_code, end_code, entry, path);
+ fprintf(fp, "BB Table: %d bbs\n", g_slist_length(bbs));
+}
+
+static void printf_char_array32(uint32_t data)
+{
+ const uint8_t *bytes = (const uint8_t *)(&data);
+ fwrite(bytes, sizeof(char), sizeof(data), fp);
+}
+
+static void printf_char_array16(uint16_t data)
+{
+ const uint8_t *bytes = (const uint8_t *)(&data);
+ fwrite(bytes, sizeof(char), sizeof(data), fp);
+}
+
+
+static void printf_el(gpointer data, gpointer user_data)
+{
+ g_mutex_lock(&lock);
+
+ bb_entry_t *bb = (bb_entry_t *)data;
+ if (bb->exec) {
+ printf_char_array32(bb->start);
+ printf_char_array16(bb->size);
+ printf_char_array16(bb->mod_id);
+ }
+
+ g_mutex_unlock(&lock);
+}
+
+static void plugin_exit(qemu_plugin_id_t id, void *p)
+{
+ /* Print function */
+ printf_header();
+ bbs = g_slist_reverse(bbs);
+ g_slist_foreach(bbs, printf_el, NULL);
+
+ /* Clear */
+ g_slist_free_full(bbs, &g_free);
+ fclose(fp);
+}
+
+static void plugin_init(void)
+{
+ fp = fopen(file_name, "wb");
+}
+
+static void vcpu_tb_exec(unsigned int cpu_index, void *udata)
+{
+ g_mutex_lock(&lock);
+
+ bb_entry_t *bb = (bb_entry_t *)udata;
+ bb->exec = true;
+
+ g_mutex_unlock(&lock);
+}
+
+static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
+{
+ uint64_t pc = qemu_plugin_tb_vaddr(tb);
+
+ size_t n = qemu_plugin_tb_n_insns(tb);
+
+ g_mutex_lock(&lock);
+
+ bb_entry_t *bb = g_new0(bb_entry_t, 1);
+ for (int i = 0; i < n; i++) {
+ bb->size += qemu_plugin_insn_size(qemu_plugin_tb_get_insn(tb, i));
+ }
+
+ bb->start = pc;
+ bb->mod_id = 0;
+ bb->exec = false;
+
+ bbs = g_slist_prepend(bbs, bb);
+ g_mutex_unlock(&lock);
+
+ qemu_plugin_register_vcpu_tb_exec_cb(tb, vcpu_tb_exec,
+ QEMU_PLUGIN_CB_NO_REGS,
+ (void *)bb);
+
+}
+
+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++) {
+ g_autofree char **tokens = g_strsplit(argv[i], "=", 2);
+ if (g_strcmp0(tokens[0], "filename") == 0) {
+ file_name = g_strdup(tokens[1]);
+ }
+ }
+
+ plugin_init();
+
+ qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
+ qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
+
+ return 0;
+}
This patch adds the ability to generate files in drcov format. Primary goal this script is to have coverage logfiles thatwork in Lighthouse. Signed-off-by: Ivanov Arkady <arkadiy.ivanov@ispras.ru> --- contrib/plugins/Makefile | 1 contrib/plugins/drcov.c | 152 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 153 insertions(+) create mode 100644 contrib/plugins/drcov.c