tests/plugin: add sample plugins
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:
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f308f64e76
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671f760b93
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@ -7903,6 +7903,7 @@ DIRS="$DIRS roms/seabios roms/vgabios"
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LINKS="Makefile"
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LINKS="$LINKS tests/tcg/lm32/Makefile po/Makefile"
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LINKS="$LINKS tests/tcg/Makefile.target tests/fp/Makefile"
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LINKS="$LINKS tests/plugin/Makefile"
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LINKS="$LINKS pc-bios/optionrom/Makefile pc-bios/keymaps"
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LINKS="$LINKS pc-bios/s390-ccw/Makefile"
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LINKS="$LINKS roms/seabios/Makefile roms/vgabios/Makefile"
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@ -0,0 +1,28 @@
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BUILD_DIR := $(CURDIR)/../..
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include $(BUILD_DIR)/config-host.mak
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include $(SRC_PATH)/rules.mak
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$(call set-vpath, $(SRC_PATH)/tests/plugin)
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NAMES :=
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NAMES += bb
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NAMES += empty
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NAMES += insn
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NAMES += mem
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SONAMES := $(addsuffix .so,$(addprefix lib,$(NAMES)))
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QEMU_CFLAGS += -fPIC
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QEMU_CFLAGS += -I$(SRC_PATH)/include/qemu
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all: $(SONAMES)
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lib%.so: %.o
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$(CC) -shared -Wl,-soname,$@ -o $@ $^ $(LDLIBS)
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clean:
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rm -f *.o *.so *.d
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rm -Rf .libs
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.PHONY: all clean
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@ -0,0 +1,64 @@
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/*
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* Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
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*
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* License: GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include <inttypes.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <glib.h>
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#include <qemu-plugin.h>
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static uint64_t bb_count;
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static uint64_t insn_count;
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static bool do_inline;
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static void plugin_exit(qemu_plugin_id_t id, void *p)
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{
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g_autofree gchar *out;
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out = g_strdup_printf("bb's: %" PRIu64", insns: %" PRIu64 "\n",
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bb_count, insn_count);
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qemu_plugin_outs(out);
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}
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static void vcpu_tb_exec(unsigned int cpu_index, void *udata)
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{
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unsigned long n_insns = (unsigned long)udata;
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insn_count += n_insns;
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bb_count++;
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}
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static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
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{
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unsigned long n_insns = qemu_plugin_tb_n_insns(tb);
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if (do_inline) {
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qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64,
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&bb_count, 1);
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qemu_plugin_register_vcpu_tb_exec_inline(tb, QEMU_PLUGIN_INLINE_ADD_U64,
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&insn_count, n_insns);
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} else {
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qemu_plugin_register_vcpu_tb_exec_cb(tb, vcpu_tb_exec,
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QEMU_PLUGIN_CB_NO_REGS,
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(void *)n_insns);
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}
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}
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QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
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const qemu_info_t *info,
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int argc, char **argv)
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{
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if (argc && strcmp(argv[0], "inline") == 0) {
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do_inline = true;
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}
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qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
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qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
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return 0;
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}
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@ -0,0 +1,30 @@
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/*
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* Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
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*
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* License: GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include <inttypes.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <qemu-plugin.h>
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/*
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* Empty TB translation callback.
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* This allows us to measure the overhead of injecting and then
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* removing empty instrumentation.
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*/
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static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
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{ }
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QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
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const qemu_info_t *info,
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int argc, char **argv)
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{
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qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
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return 0;
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}
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@ -0,0 +1,61 @@
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/*
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* Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
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*
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* License: GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include <inttypes.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <glib.h>
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#include <qemu-plugin.h>
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static uint64_t insn_count;
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static bool do_inline;
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static void vcpu_insn_exec_before(unsigned int cpu_index, void *udata)
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{
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insn_count++;
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}
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static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
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{
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size_t n = qemu_plugin_tb_n_insns(tb);
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size_t i;
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for (i = 0; i < n; i++) {
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struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, i);
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if (do_inline) {
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qemu_plugin_register_vcpu_insn_exec_inline(
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insn, QEMU_PLUGIN_INLINE_ADD_U64, &insn_count, 1);
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} else {
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qemu_plugin_register_vcpu_insn_exec_cb(
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insn, vcpu_insn_exec_before, QEMU_PLUGIN_CB_NO_REGS, NULL);
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}
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}
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}
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static void plugin_exit(qemu_plugin_id_t id, void *p)
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{
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g_autofree gchar *out;
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out = g_strdup_printf("insns: %" PRIu64 "\n", insn_count);
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qemu_plugin_outs(out);
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}
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QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
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const qemu_info_t *info,
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int argc, char **argv)
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{
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if (argc && !strcmp(argv[0], "inline")) {
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do_inline = true;
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}
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qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
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qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
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return 0;
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}
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@ -0,0 +1,97 @@
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/*
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* Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
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*
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* License: GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include <inttypes.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <glib.h>
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#include <qemu-plugin.h>
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static uint64_t mem_count;
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static uint64_t io_count;
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static bool do_inline;
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static bool do_haddr;
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static enum qemu_plugin_mem_rw rw = QEMU_PLUGIN_MEM_RW;
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static void plugin_exit(qemu_plugin_id_t id, void *p)
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{
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g_autoptr(GString) out = g_string_new("");
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g_string_printf(out, "mem accesses: %" PRIu64 "\n", mem_count);
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if (do_haddr) {
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g_string_append_printf(out, "io accesses: %" PRIu64 "\n", mem_count);
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}
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qemu_plugin_outs(out->str);
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}
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static void vcpu_mem(unsigned int cpu_index, qemu_plugin_meminfo_t meminfo,
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uint64_t vaddr, void *udata)
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{
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if (do_haddr) {
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struct qemu_plugin_hwaddr *hwaddr;
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hwaddr = qemu_plugin_get_hwaddr(meminfo, vaddr);
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if (qemu_plugin_hwaddr_is_io(hwaddr)) {
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io_count++;
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} else {
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mem_count++;
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}
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} else {
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mem_count++;
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}
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}
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static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
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{
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size_t n = qemu_plugin_tb_n_insns(tb);
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size_t i;
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for (i = 0; i < n; i++) {
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struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, i);
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if (do_inline) {
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qemu_plugin_register_vcpu_mem_inline(insn, rw,
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QEMU_PLUGIN_INLINE_ADD_U64,
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&mem_count, 1);
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} else {
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qemu_plugin_register_vcpu_mem_cb(insn, vcpu_mem,
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QEMU_PLUGIN_CB_NO_REGS,
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rw, NULL);
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}
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}
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}
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QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
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const qemu_info_t *info,
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int argc, char **argv)
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{
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if (argc) {
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if (argc >= 3) {
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if (!strcmp(argv[2], "haddr")) {
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do_haddr = true;
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}
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}
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if (argc >= 2) {
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const char *str = argv[1];
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if (!strcmp(str, "r")) {
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rw = QEMU_PLUGIN_MEM_R;
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} else if (!strcmp(str, "w")) {
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rw = QEMU_PLUGIN_MEM_W;
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}
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}
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if (!strcmp(argv[0], "inline")) {
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do_inline = true;
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}
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}
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qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans);
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qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
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return 0;
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}
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