* tracepoint.h (decode_agent_options): Add 'trace_string'

	argument.
	* tracepoint.c (decode_agent_options): Add 'trace_string'
	argument.
	(validate_actionline): Update.
	(collect_symbol): Add 'trace_string' argument.
	(struct add_local_symbols_data) <trace_string>: New field.
	(do_collect_symbol): Update.
	(add_local_symbols): Add 'trace_string' argument.
	(encode_actions_1): Update.
	(trace_dump_actions): Update.
	* dwarf2loc.c (access_memory): Update.
	* ax.h (struct agent_expr) <tracing, trace_string>: New fields.
	* ax-general.c (new_agent_expr): Update.
	* ax-gdb.h (gen_trace_for_expr, gen_trace_for_var)
	(gen_trace_for_return_address): Add argument.
	(trace_kludge, trace_string_kludge): Remove.
	* ax-gdb.c (trace_kludge, trace_string_kludge): Remove.
	(gen_traced_pop, gen_fetch, gen_bitfield_ref, gen_expr): Update.
	(gen_trace_for_var): Add 'trace_string' argument.
	(gen_trace_for_expr, gen_trace_for_return_address): Likewise.
	(gen_printf, agent_eval_command_one): Update.

1 files changed, 17 insertions, 0 deletions

diff --git a/gdb/ax.h b/gdb/ax.h
index 32887ef..3bb2d5b 100644
--- a/gdb/ax.h
+++ b/gdb/ax.h
@@ -143,6 +143,23 @@ struct agent_expr
     */
     int reg_mask_len;
     unsigned char *reg_mask;
+
+    /* For the data tracing facility, we need to insert `trace' bytecodes
+       before each data fetch; this records all the memory that the
+       expression touches in the course of evaluation, so that memory will
+       be available when the user later tries to evaluate the expression
+       in GDB.
+
+       Setting the flag 'tracing' to non-zero enables the code that
+       emits the trace bytecodes at the appropriate points.  */
+
+    unsigned int tracing : 1;
+
+    /* This indicates that pointers to chars should get an added
+       tracenz bytecode to record nonzero bytes, up to a length that
+       is the value of trace_string.  */
+
+    int trace_string;
   };
 
 /* Pointer to an agent_expr structure.  */