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[PULL v2 02/15] plugins: new syscalls plugin
From: |
Alex Bennée |
Subject: |
[PULL v2 02/15] plugins: new syscalls plugin |
Date: |
Wed, 17 Mar 2021 07:22:03 +0000 |
From: Matthias Weckbecker <matthias@weckbecker.name>
This commit adds a new syscalls plugin that displays the syscalls
as they are executed and returned. This plugin outputs the number
of the syscall as well as the syscall return value.
Works in *-user only.
Essentially, this commit restores:
https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg00846.html
by using the new QEMU plugin API.
Signed-off-by: Matthias Weckbecker <matthias@weckbecker.name>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200812115816.4454-1-matthias@weckbecker.name>
Message-Id: <20210312172821.31647-2-alex.bennee@linaro.org>
diff --git a/tests/plugin/syscall.c b/tests/plugin/syscall.c
new file mode 100644
index 0000000000..53ee2ab6c4
--- /dev/null
+++ b/tests/plugin/syscall.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2020, Matthias Weckbecker <matthias@weckbecker.name>
+ *
+ * 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 void vcpu_syscall(qemu_plugin_id_t id, unsigned int vcpu_index,
+ int64_t num, uint64_t a1, uint64_t a2,
+ uint64_t a3, uint64_t a4, uint64_t a5,
+ uint64_t a6, uint64_t a7, uint64_t a8)
+{
+ g_autofree gchar *out = g_strdup_printf("syscall #%" PRIi64 "\n", num);
+ qemu_plugin_outs(out);
+}
+
+static void vcpu_syscall_ret(qemu_plugin_id_t id, unsigned int vcpu_idx,
+ int64_t num, int64_t ret)
+{
+ g_autofree gchar *out;
+ out = g_strdup_printf("syscall #%" PRIi64 " returned -> %" PRIi64 "\n",
+ num, ret);
+ qemu_plugin_outs(out);
+}
+
+/* ************************************************************************* */
+
+static void plugin_exit(qemu_plugin_id_t id, void *p) {}
+
+QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
+ const qemu_info_t *info,
+ int argc, char **argv)
+{
+ qemu_plugin_register_vcpu_syscall_cb(id, vcpu_syscall);
+ qemu_plugin_register_vcpu_syscall_ret_cb(id, vcpu_syscall_ret);
+ qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
+ return 0;
+}
diff --git a/tests/plugin/meson.build b/tests/plugin/meson.build
index 1eacfa6e35..2bbfc4b19e 100644
--- a/tests/plugin/meson.build
+++ b/tests/plugin/meson.build
@@ -1,5 +1,5 @@
t = []
-foreach i : ['bb', 'empty', 'insn', 'mem']
+foreach i : ['bb', 'empty', 'insn', 'mem', 'syscall']
t += shared_module(i, files(i + '.c'),
include_directories: '../../include/qemu',
dependencies: glib)
--
2.20.1
- [PULL v2 00/15] misc fixes (strtoz, plugins, guest-loader), Alex Bennée, 2021/03/17
- [PULL v2 01/15] utils: Use fixed-point arithmetic in qemu_strtosz, Alex Bennée, 2021/03/17
- [PULL v2 03/15] plugins: Expose physical addresses instead of device offsets, Alex Bennée, 2021/03/17
- [PULL v2 04/15] plugins: expand kernel-doc for qemu_info_t, Alex Bennée, 2021/03/17
- [PULL v2 02/15] plugins: new syscalls plugin,
Alex Bennée <=
- [PULL v2 08/15] plugins: add qemu_plugin_cb_flags to kernel-doc, Alex Bennée, 2021/03/17
- [PULL v2 07/15] plugins: expand the typedef kernel-docs for translation, Alex Bennée, 2021/03/17
- [PULL v2 05/15] plugins: cleanup kernel-doc for qemu_plugin_install, Alex Bennée, 2021/03/17
- [PULL v2 06/15] plugins: expand the callback typedef kernel-docs, Alex Bennée, 2021/03/17
- [PULL v2 09/15] plugins: add qemu_plugin_id_t to kernel-doc, Alex Bennée, 2021/03/17
- [PULL v2 12/15] plugins: expand kernel-doc for memory query and instrumentation, Alex Bennée, 2021/03/17
- [PULL v2 10/15] plugins: expand inline exec kernel-doc documentation., Alex Bennée, 2021/03/17
- [PULL v2 11/15] plugins: expand kernel-doc for instruction query and instrumentation, Alex Bennée, 2021/03/17
- [PULL v2 13/15] plugins: getting qemu_plugin_get_hwaddr only expose one function prototype, Alex Bennée, 2021/03/17
- [PULL v2 15/15] hw/core: Only build guest-loader if libfdt is available, Alex Bennée, 2021/03/17