[profiler] Update documentation on the backtrace format.

diff --git a/mono/profiler/proflog.c b/mono/profiler/proflog.c
index 1d154c6bfc3cbd50cae665d5b35c73efe2798c7e..e6c1b999f7f6e9c9d59939e3a351c2c2775f60d5 100644 (file)
--- a/mono/profiler/proflog.c
+++ b/mono/profiler/proflog.c
@@ -218,7 +218,8 @@ static MonoLinkedListSet profiler_thread_list;
  *
  * backtrace format:
  * [num: uleb128] number of frames following
- * [frame: sleb128]* num MonoMethod pointers as differences from ptr_base
+ * [frame: sleb128]* mum MonoMethod* as a pointer difference from the last such
+ * pointer or the buffer method_base
  *
  * type alloc format:
  * type: TYPE_ALLOC