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author | Mahmoud Mandour <ma.mandourr@gmail.com> | 2021-05-20 18:43:03 +0100 |
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committer | Alex Bennée <alex.bennee@linaro.org> | 2021-05-25 16:52:50 +0100 |
commit | a6851b49e3b0509168d74050d0e59fe0121b2898 (patch) | |
tree | 00a83dac9702496c624e317221a827d2c8114218 /tests/plugin | |
parent | ed12f5b4ef626bfd1deb6f178282a18ab948750e (diff) | |
download | qemu-a6851b49e3b0509168d74050d0e59fe0121b2898.zip qemu-a6851b49e3b0509168d74050d0e59fe0121b2898.tar.gz qemu-a6851b49e3b0509168d74050d0e59fe0121b2898.tar.bz2 |
plugins/syscall: Added a table-like summary output
Added a table-like output which contains the total number of calls
for each used syscall along with the number of errors that occurred.
Per-call tracing is still available through supplying the argument
``print`` to the plugin.
Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210519032409.3041-1-ma.mandourr@gmail.com>
Message-Id: <20210520174303.12310-9-alex.bennee@linaro.org>
Diffstat (limited to 'tests/plugin')
-rw-r--r-- | tests/plugin/syscall.c | 98 |
1 files changed, 93 insertions, 5 deletions
diff --git a/tests/plugin/syscall.c b/tests/plugin/syscall.c index 53ee2ab..6dd7109 100644 --- a/tests/plugin/syscall.c +++ b/tests/plugin/syscall.c @@ -16,32 +16,120 @@ QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION; +typedef struct { + int64_t num; + int64_t calls; + int64_t errors; +} SyscallStats; + +static GMutex lock; +static GHashTable *statistics; + +static SyscallStats *get_or_create_entry(int64_t num) +{ + SyscallStats *entry = + (SyscallStats *) g_hash_table_lookup(statistics, GINT_TO_POINTER(num)); + + if (!entry) { + entry = g_new0(SyscallStats, 1); + entry->num = num; + g_hash_table_insert(statistics, GINT_TO_POINTER(num), (gpointer) entry); + } + + return entry; +} + 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); + if (statistics) { + SyscallStats *entry; + g_mutex_lock(&lock); + entry = get_or_create_entry(num); + entry->calls++; + g_mutex_unlock(&lock); + } else { + 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) { + if (statistics) { + SyscallStats *entry; + + g_mutex_lock(&lock); + /* Should always return an existent entry. */ + entry = get_or_create_entry(num); + if (ret < 0) { + entry->errors++; + } + g_mutex_unlock(&lock); + } else { + g_autofree gchar *out; + out = g_strdup_printf("syscall #%" PRIi64 " returned -> %" PRIi64 "\n", + num, ret); + qemu_plugin_outs(out); + } +} + +static void print_entry(gpointer val, gpointer user_data) +{ g_autofree gchar *out; - out = g_strdup_printf("syscall #%" PRIi64 " returned -> %" PRIi64 "\n", - num, ret); + SyscallStats *entry = (SyscallStats *) val; + int64_t syscall_num = entry->num; + out = g_strdup_printf( + "%-13" PRIi64 "%-6" PRIi64 " %" PRIi64 "\n", + syscall_num, entry->calls, entry->errors); qemu_plugin_outs(out); } +static gint comp_func(gconstpointer ea, gconstpointer eb) +{ + SyscallStats *ent_a = (SyscallStats *) ea; + SyscallStats *ent_b = (SyscallStats *) eb; + + return ent_a->calls > ent_b->calls ? -1 : 1; +} + /* ************************************************************************* */ +static void plugin_exit(qemu_plugin_id_t id, void *p) +{ + if (!statistics) { + return; + } + + g_mutex_lock(&lock); + GList *entries = g_hash_table_get_values(statistics); + entries = g_list_sort(entries, comp_func); + qemu_plugin_outs("syscall no. calls errors\n"); -static void plugin_exit(qemu_plugin_id_t id, void *p) {} + g_list_foreach(entries, print_entry, NULL); + + g_list_free(entries); + g_hash_table_destroy(statistics); + g_mutex_unlock(&lock); +} QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info, int argc, char **argv) { + if (argc == 0) { + statistics = g_hash_table_new_full(NULL, g_direct_equal, NULL, g_free); + } else { + for (int i = 0; i < argc; i++) { + if (g_strcmp0(argv[i], "print") != 0) { + fprintf(stderr, "unsupported argument: %s\n", argv[i]); + return -1; + } + } + } + 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); |