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libsysprof-profile: add processes during recording

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We want to reduce the chances we miss things between prepare and record
virtual methods, so delay the adding of processes until the recording is
started. We may get duplicate records, but we can deal with that when
analyzing the capture.
This commit is contained in:
Christian Hergert
2023-05-30 17:12:19 -07:00
parent 5c825c1fb5
commit ee3a78433f
1 changed files with 37 additions and 12 deletions
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49
src/libsysprof-profile/sysprof-linux-instrument.c
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@ -45,21 +45,19 @@ sysprof_linux_instrument_list_required_policy (SysprofInstrument *instrument)
static void
add_process_info (SysprofRecording *recording,
GVariant *process_info_reply)
GVariant *process_info)
{
g_autoptr(GPtrArray) futures = NULL;
g_autoptr(GVariant) process_info = NULL;
SysprofCaptureWriter *writer;
GVariantIter iter;
GVariant *pidinfo;
g_assert (process_info_reply != NULL);
g_assert (g_variant_is_of_type (process_info_reply, G_VARIANT_TYPE ("(aa{sv})")));
g_assert (process_info != NULL);
g_assert (g_variant_is_of_type (process_info, G_VARIANT_TYPE ("aa{sv}")));
writer = _sysprof_recording_writer (recording);
/* Loop through all the PIDs the server notified us about */
process_info = g_variant_get_child_value (process_info_reply, 0);
g_variant_iter_init (&iter, process_info);
while (g_variant_iter_loop (&iter, "@a{sv}", &pidinfo))
{
@ -118,9 +116,6 @@ static DexFuture *
sysprof_linux_instrument_prepare_fiber (gpointer user_data)
{
SysprofRecording *recording = user_data;
g_autoptr(GDBusConnection) bus = NULL;
g_autoptr(GVariant) process_info_reply = NULL;
g_autoptr(GVariant) process_info = NULL;
g_autoptr(GError) error = NULL;
g_assert (SYSPROF_IS_RECORDING (recording));
@ -135,6 +130,33 @@ sysprof_linux_instrument_prepare_fiber (gpointer user_data)
&error))
return dex_future_new_for_error (g_steal_pointer (&error));
return dex_future_new_for_boolean (TRUE);
}
static DexFuture *
sysprof_linux_instrument_prepare (SysprofInstrument *instrument,
SysprofRecording *recording)
{
g_assert (SYSPROF_IS_INSTRUMENT (instrument));
g_assert (SYSPROF_IS_RECORDING (recording));
return dex_scheduler_spawn (NULL, 0,
sysprof_linux_instrument_prepare_fiber,
g_object_ref (recording),
g_object_unref);
}
static DexFuture *
sysprof_linux_instrument_record_fiber (gpointer user_data)
{
SysprofRecording *recording = user_data;
g_autoptr(GDBusConnection) bus = NULL;
g_autoptr(GVariant) process_info_reply = NULL;
g_autoptr(GVariant) process_info = NULL;
g_autoptr(GError) error = NULL;
g_assert (SYSPROF_IS_RECORDING (recording));
/* We need access to the bus to call various sysprofd API directly */
if (!(bus = dex_await_object (dex_bus_get (G_BUS_TYPE_SYSTEM), &error)))
return dex_future_new_for_error (g_steal_pointer (&error));
@ -155,20 +177,22 @@ sysprof_linux_instrument_prepare_fiber (gpointer user_data)
return dex_future_new_for_error (g_steal_pointer (&error));
/* Add process records for each of the processes discovered */
add_process_info (recording, process_info_reply);
process_info = g_variant_get_child_value (process_info_reply, 0);
add_process_info (recording, process_info);
return dex_future_new_for_boolean (TRUE);
}
static DexFuture *
sysprof_linux_instrument_prepare (SysprofInstrument *instrument,
SysprofRecording *recording)
sysprof_linux_instrument_record (SysprofInstrument *instrument,
SysprofRecording *recording,
GCancellable *cancellable)
{
g_assert (SYSPROF_IS_INSTRUMENT (instrument));
g_assert (SYSPROF_IS_RECORDING (recording));
return dex_scheduler_spawn (NULL, 0,
sysprof_linux_instrument_prepare_fiber,
sysprof_linux_instrument_record_fiber,
g_object_ref (recording),
g_object_unref);
}
@ -189,6 +213,7 @@ sysprof_linux_instrument_class_init (SysprofLinuxInstrumentClass *klass)
instrument_class->list_required_policy = sysprof_linux_instrument_list_required_policy;
instrument_class->prepare = sysprof_linux_instrument_prepare;
instrument_class->record = sysprof_linux_instrument_record;
}
static void