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tests/plugin: add sample plugins

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Pass arguments with -plugin=libfoo.so,arg=bar,arg=baz

Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Emilio G. Cota 2018-10-25 12:57:04 -04:00 • committed by Alex Bennée
parent f308f64e76
commit 671f760b93
6 changed files with 281 additions and 0 deletions
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64
tests/plugin/bb.c Normal file
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/*
* 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>
static uint64_t bb_count;
static uint64_t insn_count;
static bool do_inline;
static void plugin_exit(qemu_plugin_id_t id, void *p)
{
g_autofree gchar *out;
out = g_strdup_printf("bb's: %" PRIu64", insns: %" PRIu64 "\n",
bb_count, insn_count);
qemu_plugin_outs(out);
}
static void vcpu_tb_exec(unsigned int cpu_index, void *udata)
{
unsigned long n_insns = (unsigned long)udata;
insn_count += n_insns;
bb_count++;
}
static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
{
unsigned long n_insns = qemu_plugin_tb_n_insns(tb);
if (do_inline) {
qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64,
&bb_count, 1);
qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64,
&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)
{
if (argc && strcmp(argv[0], "inline") == 0) {
do_inline = true;
}
qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
return 0;
}