libsysprof: join libsysprof-analyze and libsysprof-profile

This brings together the two libraries back into one now that the whole
design is pretty well sorted out. They depend on roughly the same libraries
anyway and it's way easier of the single library can both read and write
the capture files (along with bringing in libsysprof-capture symbols in
a single place).

src/libsysprof/sysprof-system-logs.c

@@ -0,0 +1,194 @@
+/* sysprof-system-logs.c
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "config.h"
+
+#include <errno.h>
+
+#include <glib/gi18n.h>
+#include <glib/gstdio.h>
+
+#include "sysprof-system-logs.h"
+#include "sysprof-instrument-private.h"
+#include "sysprof-recording-private.h"
+
+#ifdef HAVE_LIBSYSTEMD
+# include "sysprof-journald-source.h"
+#endif
+
+struct _SysprofSystemLogs
+{
+  SysprofInstrument parent_instance;
+};
+
+struct _SysprofSystemLogsClass
+{
+  SysprofInstrumentClass parent_class;
+};
+
+G_DEFINE_FINAL_TYPE (SysprofSystemLogs, sysprof_system_logs, SYSPROF_TYPE_INSTRUMENT)
+
+#ifdef HAVE_LIBSYSTEMD
+static char *
+journal_get_data (sd_journal *journal,
+                  const char *field)
+{
+  gconstpointer data = NULL;
+  const char *endptr;
+  const char *eq;
+  gsize length;
+  int ret;
+
+  g_assert (journal != NULL);
+  g_assert (field != NULL);
+
+  if ((ret = sd_journal_get_data (journal, field, &data, &length)) < 0)
+    return NULL;
+
+  endptr = (const char *)data + length;
+  if (!(eq = memchr (data, '=', length)))
+    return NULL;
+
+  eq++;
+
+  return g_strndup (eq, endptr - eq);
+}
+
+static gboolean
+sysprof_system_logs_callback (SysprofCaptureWriter *writer,
+                              sd_journal           *journal)
+{
+  g_autofree char *message = NULL;
+  g_autofree char *priority = NULL;
+  sd_id128_t boot_id;
+  guint64 usec;
+  int severity = 0;
+
+  g_assert (journal != NULL);
+  g_assert (writer != NULL);
+
+  if (sd_journal_get_monotonic_usec (journal, &usec, &boot_id) != 0 ||
+      !(message = journal_get_data (journal, "MESSAGE")))
+    return G_SOURCE_CONTINUE;
+
+  priority = journal_get_data (journal, "PRIORITY");
+
+  if (priority != NULL)
+    {
+      switch (priority[0])
+        {
+        case '0':
+        case '1':
+          severity = G_LOG_LEVEL_ERROR;
+          break;
+
+        case '2':
+          severity = G_LOG_LEVEL_CRITICAL;
+          break;
+
+        case '3':
+        case '4':
+          severity = G_LOG_LEVEL_WARNING;
+          break;
+
+        default:
+        case '5':
+          severity = G_LOG_LEVEL_MESSAGE;
+          break;
+
+        case '6':
+          severity = G_LOG_LEVEL_INFO;
+          break;
+
+        case '7':
+          severity = G_LOG_LEVEL_DEBUG;
+          break;
+        }
+    }
+
+  sysprof_capture_writer_add_log (writer, usec*1000, -1, -1, severity, "System Log", message);
+
+  return G_SOURCE_CONTINUE;
+}
+#endif
+
+#ifdef HAVE_LIBSYSTEMD
+static DexFuture *
+sysprof_system_logs_record_finished (DexFuture *future,
+                                     gpointer   user_data)
+{
+  GSource *source = user_data;
+  g_source_destroy (source);
+  return dex_future_new_for_boolean (TRUE);
+}
+#endif
+
+static DexFuture *
+sysprof_system_logs_record (SysprofInstrument *instrument,
+                            SysprofRecording  *recording,
+                            GCancellable      *cancellable)
+{
+#ifdef HAVE_LIBSYSTEMD
+  SysprofCaptureWriter *writer;
+  GSource *source;
+
+  g_assert (SYSPROF_IS_SYSTEM_LOGS (instrument));
+  g_assert (SYSPROF_IS_RECORDING (recording));
+  g_assert (G_IS_CANCELLABLE (cancellable));
+
+  writer = _sysprof_recording_writer (recording);
+
+  source = sysprof_journald_source_new ((SysprofJournaldSourceFunc)sysprof_system_logs_callback,
+                                        sysprof_capture_writer_ref (writer),
+                                        (GDestroyNotify)sysprof_capture_writer_unref);
+  g_source_set_static_name (source, "[sysprof-journald]");
+  g_source_set_priority (source, G_PRIORITY_LOW);
+  g_source_attach (source, NULL);
+
+  return dex_future_finally (dex_cancellable_new_from_cancellable (cancellable),
+                             sysprof_system_logs_record_finished,
+                             source,
+                             (GDestroyNotify)g_source_unref);
+#else
+  _sysprof_recording_diagnostic (recording,
+                                 _("System Logs"),
+                                 _("Recording system logs is not supported on your platform."));
+  return dex_future_new_for_boolean (TRUE);
+#endif
+}
+
+static void
+sysprof_system_logs_class_init (SysprofSystemLogsClass *klass)
+{
+  SysprofInstrumentClass *instrument_class = SYSPROF_INSTRUMENT_CLASS (klass);
+
+  instrument_class->record = sysprof_system_logs_record;
+}
+
+static void
+sysprof_system_logs_init (SysprofSystemLogs *self)
+{
+}
+
+SysprofInstrument *
+sysprof_system_logs_new (void)
+{
+  return g_object_new (SYSPROF_TYPE_SYSTEM_LOGS, NULL);
+}