diff --git a/src/libsysprof-analyze/meson.build b/src/libsysprof-analyze/meson.build
index ab663812..4fdd21ad 100644
--- a/src/libsysprof-analyze/meson.build
+++ b/src/libsysprof-analyze/meson.build
@@ -43,6 +43,8 @@ libsysprof_analyze_public_headers = [
 
 libsysprof_analyze_deps = [
   dependency('gio-2.0', version: glib_req_version),
+  dependency('gtk4', version: gtk_req_version),
+
   libsysprof_capture_deps,
 ]
 
diff --git a/src/libsysprof-analyze/sysprof-document-private.h b/src/libsysprof-analyze/sysprof-document-private.h
index 6af9bd36..1e8eee5f 100644
--- a/src/libsysprof-analyze/sysprof-document-private.h
+++ b/src/libsysprof-analyze/sysprof-document-private.h
@@ -20,12 +20,15 @@
 
 #pragma once
 
+#include <gtk/gtk.h>
+
 #include "sysprof-document.h"
 
 G_BEGIN_DECLS
 
-gboolean  _sysprof_document_is_native  (SysprofDocument *self);
-char     *_sysprof_document_ref_string (SysprofDocument *self,
-                                        const char      *name);
+gboolean    _sysprof_document_is_native  (SysprofDocument *self);
+char       *_sysprof_document_ref_string (SysprofDocument *self,
+                                          const char      *name);
+GtkBitset  *_sysprof_document_samples    (SysprofDocument *self);
 
 G_END_DECLS
diff --git a/src/libsysprof-analyze/sysprof-document-symbols.c b/src/libsysprof-analyze/sysprof-document-symbols.c
index a064ef53..4116fa81 100644
--- a/src/libsysprof-analyze/sysprof-document-symbols.c
+++ b/src/libsysprof-analyze/sysprof-document-symbols.c
@@ -20,7 +20,9 @@
 
 #include "config.h"
 
+#include "sysprof-document-private.h"
 #include "sysprof-document-symbols-private.h"
+#include "sysprof-document-traceable.h"
 #include "sysprof-symbolizer-private.h"
 
 struct _SysprofDocumentSymbols
@@ -72,6 +74,10 @@ sysprof_document_symbols_worker (GTask        *task,
                                  GCancellable *cancellable)
 {
   Symbolize *state = task_data;
+  GtkBitsetIter iter;
+  GtkBitset *bitset;
+  GListModel *model;
+  guint i;
 
   g_assert (source_object == NULL);
   g_assert (G_IS_TASK (task));
@@ -81,6 +87,21 @@ sysprof_document_symbols_worker (GTask        *task,
   g_assert (SYSPROF_IS_SYMBOLIZER (state->symbolizer));
   g_assert (SYSPROF_IS_DOCUMENT_SYMBOLS (state->symbols));
 
+  bitset = _sysprof_document_samples (state->document);
+  model = G_LIST_MODEL (state->document);
+
+  if (gtk_bitset_iter_init_first (&iter, bitset, &i))
+    {
+      do
+        {
+          g_autoptr(SysprofDocumentTraceable) traceable = g_list_model_get_item (model, i);
+
+          if (!SYSPROF_IS_DOCUMENT_TRACEABLE (traceable))
+            continue;
+        }
+      while (gtk_bitset_iter_next (&iter, &i));
+    }
+
   g_task_return_new_error (task,
                            G_IO_ERROR,
                            G_IO_ERROR_NOT_SUPPORTED,
diff --git a/src/libsysprof-analyze/sysprof-document.c b/src/libsysprof-analyze/sysprof-document.c
index 9d1285c6..3f767edb 100644
--- a/src/libsysprof-analyze/sysprof-document.c
+++ b/src/libsysprof-analyze/sysprof-document.c
@@ -24,7 +24,7 @@
 
 #include <glib/gstdio.h>
 
-#include "sysprof-document.h"
+#include "sysprof-document-private.h"
 #include "sysprof-document-frame-private.h"
 #include "sysprof-document-symbols-private.h"
 #include "sysprof-symbolizer-private.h"
@@ -37,6 +37,8 @@ struct _SysprofDocument
   GMappedFile              *mapped_file;
   const guint8             *base;
 
+  GtkBitset                *samples;
+
   GMutex                    strings_mutex;
   GHashTable               *strings;
 
@@ -99,6 +101,7 @@ sysprof_document_finalize (GObject *object)
   g_clear_pointer (&self->mapped_file, g_mapped_file_unref);
   g_clear_pointer (&self->frames, g_array_unref);
   g_clear_pointer (&self->strings, g_hash_table_unref);
+  g_clear_pointer (&self->samples, gtk_bitset_unref);
 
   g_mutex_clear (&self->strings_mutex);
 
@@ -115,10 +118,12 @@ sysprof_document_class_init (SysprofDocumentClass *klass)
 static void
 sysprof_document_init (SysprofDocument *self)
 {
+  g_mutex_init (&self->strings_mutex);
+
   self->frames = g_array_new (FALSE, FALSE, sizeof (SysprofDocumentFramePointer));
   self->strings = g_hash_table_new_full (g_str_hash, g_str_equal, NULL,
                                          (GDestroyNotify)g_ref_string_release);
-  g_mutex_init (&self->strings_mutex);
+  self->samples = gtk_bitset_new_empty ();
 }
 
 static gboolean
@@ -158,6 +163,7 @@ sysprof_document_load (SysprofDocument  *self,
   pos = sizeof self->header;
   while (pos < (len - sizeof(guint16)))
     {
+      const SysprofCaptureFrame *tainted;
       SysprofDocumentFramePointer ptr;
       guint16 frame_len;
 
@@ -170,9 +176,15 @@ sysprof_document_load (SysprofDocument  *self,
 
       ptr.offset = pos;
       ptr.length = frame_len;
-      g_array_append_val (self->frames, ptr);
+
+      tainted = (const SysprofCaptureFrame *)(gpointer)&self->base[pos];
+      if (tainted->type == SYSPROF_CAPTURE_FRAME_SAMPLE ||
+          tainted->type == SYSPROF_CAPTURE_FRAME_ALLOCATION)
+        gtk_bitset_add (self->samples, self->frames->len);
 
       pos += frame_len;
+
+      g_array_append_val (self->frames, ptr);
     }
 
   return TRUE;
@@ -490,3 +502,11 @@ sysprof_document_lookup_file_finish (SysprofDocument  *self,
 
   return g_task_propagate_pointer (G_TASK (result), error);
 }
+
+GtkBitset *
+_sysprof_document_samples (SysprofDocument *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_DOCUMENT (self), NULL);
+
+  return self->samples;
+}