[sysprof] tests: add helper to test symbol resolving

[Christian Hergert <chergert src gnome org>]

commit 066b3011bbc5fb4eaa308558696baf99c68e41e2
Author: Christian Hergert <chergert redhat com>
Date:   Fri Aug 2 19:39:20 2019 -0700

    tests: add helper to test symbol resolving

 src/tests/meson.build      |   6 +++
 src/tests/test-resolvers.c | 101 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 107 insertions(+)
---
diff --git a/src/tests/meson.build b/src/tests/meson.build
index ac80997..e504e39 100644
--- a/src/tests/meson.build
+++ b/src/tests/meson.build
@@ -57,6 +57,12 @@ test_flatpak = executable('test-flatpak',
   dependencies: test_deps,
 )
 
+test_resolvers = executable('test-resolvers',
+  [ 'test-resolvers.c' ],
+        c_args: test_cflags,
+  dependencies: test_deps,
+)
+
 
 if get_option('enable_gtk')
 
diff --git a/src/tests/test-resolvers.c b/src/tests/test-resolvers.c
new file mode 100644
index 0000000..f446476
--- /dev/null
+++ b/src/tests/test-resolvers.c
@@ -0,0 +1,101 @@
+#include <sysprof.h>
+
+static const SysprofCaptureSample *
+read_to_next_sample (SysprofCaptureReader *reader)
+{
+  SysprofCaptureFrameType type;
+
+  while (sysprof_capture_reader_peek_type (reader, &type))
+    {
+      if (type != SYSPROF_CAPTURE_FRAME_SAMPLE)
+        {
+          if (!sysprof_capture_reader_skip (reader))
+            break;
+          continue;
+        }
+
+      return sysprof_capture_reader_read_sample (reader);
+    }
+
+  return NULL;
+}
+
+gint
+main (gint  argc,
+      gchar *argv[])
+{
+  g_autoptr(GPtrArray) resolvers = NULL;
+  g_autoptr(SysprofCaptureReader) reader = NULL;
+  g_autoptr(GError) error = NULL;
+  const SysprofCaptureSample *sample;
+  const gchar *filename;
+
+  if (argc != 2)
+    {
+      g_printerr ("usage: %s capture_file\n", argv[0]);
+      return 1;
+    }
+
+  filename = argv[1];
+  resolvers = g_ptr_array_new_with_free_func (g_object_unref);
+  g_ptr_array_add (resolvers, sysprof_elf_symbol_resolver_new ());
+  g_ptr_array_add (resolvers, sysprof_kernel_symbol_resolver_new ());
+
+  if (!(reader = sysprof_capture_reader_new (filename, &error)))
+    g_error ("%s", error->message);
+
+  for (guint r = 0; r < resolvers->len; r++)
+    {
+      SysprofSymbolResolver *resolver = g_ptr_array_index (resolvers, r);
+
+      sysprof_symbol_resolver_load (resolver, reader);
+      sysprof_capture_reader_reset (reader);
+    }
+
+  while ((sample = read_to_next_sample (reader)))
+    {
+      SysprofAddressContext last_context = SYSPROF_ADDRESS_CONTEXT_NONE;
+
+      g_print ("Sample: pid=%d depth=%d\n", sample->frame.pid, sample->n_addrs);
+
+      for (guint a = 0; a < sample->n_addrs; a++)
+        {
+          SysprofAddress addr = sample->addrs[a];
+          SysprofAddressContext context;
+          gboolean found;
+
+           if (sysprof_address_is_context_switch (addr, &context))
+             {
+               g_print ("  %02d: %016lx: Context Switch\n", a, addr);
+               last_context = context;
+               continue;
+             }
+
+          for (guint r = 0; r < resolvers->len; r++)
+            {
+              SysprofSymbolResolver *resolver = g_ptr_array_index (resolvers, r);
+              g_autofree gchar *symbol = NULL;
+              GQuark tag;
+
+              symbol = sysprof_symbol_resolver_resolve_with_context (resolver,
+                                                                     sample->frame.time,
+                                                                     sample->frame.pid,
+                                                                     last_context,
+                                                                     addr,
+                                                                     &tag);
+
+              if (symbol != NULL)
+                {
+                  g_print ("  %02d: %016lx: %s\n", a, addr, symbol);
+                  found = TRUE;
+                  break;
+                }
+            }
+
+          if (!found)
+            g_print ("  %02d: %016lx: \n", a, addr);
+        }
+    }
+
+  return 0;
+}