qemu/tests/plugin/mem.c
Mahmoud Mandour 5ae589faad tests/plugins/mem: introduce "track" arg and make args not positional
This commit makes the plugin adhere to the new plugins arg-passing
scheme by expecting full-form boolean args instead of short-form
booleans. This necessitates that we introduce a new argument, here
"track", to accept "r", "w", or "rw".

Also, it makes arguments not positional and we only care about the last
value specified for a certain argument.

callback/inline args are now supplied separately as bool arguments so
that both can be enabled individually.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210730135817.17816-12-ma.mandourr@gmail.com>
2021-09-02 11:29:34 +01:00

124 lines
3.9 KiB
C

/*
* 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;
static uint64_t inline_mem_count;
static uint64_t cb_mem_count;
static uint64_t 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) {
g_string_printf(out, "inline mem accesses: %" PRIu64 "\n", inline_mem_count);
}
if (do_callback) {
g_string_append_printf(out, "callback mem accesses: %" PRIu64 "\n", cb_mem_count);
}
if (do_haddr) {
g_string_append_printf(out, "io accesses: %" PRIu64 "\n", io_count);
}
qemu_plugin_outs(out->str);
}
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)) {
io_count++;
} else {
cb_mem_count++;
}
} else {
cb_mem_count++;
}
}
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(insn, rw,
QEMU_PLUGIN_INLINE_ADD_U64,
&inline_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_autofree char **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, "invaild 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;
}
}
qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
return 0;
}