Add default-collect variable.

	* tracepoint.c (default_collect): New global.
	(encode_actions): Use it.
	(download_tracepoint): Test it, for otherwise
	action-less tracepoints.
	(_initialize_tracepoint): Add set/show.
	* NEWS: Mention default-collect.

	* gdb.texinfo (Tracepoint Actions): Describe default-collect.

	* gdb.trace/actions.exp: Test default-collect.

1 files changed, 16 insertions, 0 deletions

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 7d3a35c..39f0d67 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -9643,6 +9643,22 @@ its own @code{end} command):
 @noindent
 You may abbreviate @code{while-stepping} as @code{ws} or
 @code{stepping}.
+
+@item set default-collect @var{expr1}, @var{expr2}, @dots{}
+@kindex set default-collect
+@cindex default collection action
+This variable is a list of expressions to collect at each tracepoint
+hit.  It is effectively an additional @code{collect} action prepended
+to every tracepoint action list.  The expressions are parsed
+individually for each tracepoint, so for instance a variable named
+@code{xyz} may be interpreted as a global for one tracepoint, and a
+local for another, as appropriate to the tracepoint's location.
+
+@item show default-collect
+@kindex show default-collect
+Show the list of expressions that are collected by default at each
+tracepoint hit.
+
 @end table
 
 @node Listing Tracepoints