* tracepoint.c: Include stack.h.
(struct add_local_symbols_data): New.
(do_collect_symbol): New.
(add_local_symbols): Rewrite using iterate_over_block_arg_vars and
iterate_over_block_local_vars.
* stack.c (print_block_frame_locals): Rewrite as ...
(iterate_over_block_locals): ... this. Take a callback function
pointer and generic data pointer, and call that instead of
print_variable_and_value.
(struct print_variable_and_value_data): New.
(do_print_variable_and_value): New.
(iterate_over_block_local_vars): New, abstracted out from
print_frame_local_vars.
(print_frame_local_vars): Rewrite using
iterate_over_block_local_vars.
(iterate_over_block_arg_vars): New, abstracted out from
print_frame_arg_vars.
(print_frame_arg_vars): Rewrite using iterate_over_block_arg_vars.
* stack.h (iterate_over_block_arg_local_vars_cb): New typedef.
(iterate_over_block_arg_vars, iterate_over_block_local_vars): Declare.
gdb/testsuite/
* gdb.trace/collection.c (local_test_func): Define a local struct,
and instanciate it.
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