[sysprof] libsysprof: add context check for inline symbol decoding

[Christian Hergert <chergert src gnome org>]

commit 1fbeabf2a24408209b9c62816d444f156ebd6911
Author: Christian Hergert <chergert redhat com>
Date:   Wed Feb 26 10:55:34 2020 -0800

    libsysprof: add context check for inline symbol decoding

 src/libsysprof/sysprof-symbol-map.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/src/libsysprof/sysprof-symbol-map.c b/src/libsysprof/sysprof-symbol-map.c
index 1d52f5c..2ff57d5 100644
--- a/src/libsysprof/sysprof-symbol-map.c
+++ b/src/libsysprof/sysprof-symbol-map.c
@@ -313,6 +313,10 @@ sysprof_symbol_map_do_sample (SysprofSymbolMap        *self,
           continue;
         }
 
+      /* Handle backtrace() style backtraces with no context switch */
+      if (last_context == SYSPROF_ADDRESS_CONTEXT_NONE)
+        last_context = SYSPROF_ADDRESS_CONTEXT_USER;
+
       for (guint j = 0; j < self->resolvers->len; j++)
         {
           SysprofSymbolResolver *resolver = g_ptr_array_index (self->resolvers, j);