The big deletion patch left some identical namespace scopes sitting
next to one another. This patch removes the redundant "namespace
expr"s.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c: Merge "namespace" scopes.
This adds an expr::operation_up to struct expression, and then
modifies various parts of GDB to use this member when it is non-null.
The list of such spots was a bit surprising to me, and found only
after writing most of the code and then noticing what no longer
compiled.
In a few spots, new accessor methods are added to operation
subclasses, so that code that dissects an expression will work with
the new scheme.
After this change, code that constructs an expression can be switched
to the new form without breaking.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* ada-exp.h (class ada_var_value_operation) <get_symbol>: Remove;
now in superclass.
* value.h (fetch_subexp_value): Add "op" parameter.
* value.c (init_if_undefined_command): Update.
* tracepoint.c (validate_actionline, encode_actions_1): Update.
* stap-probe.c (stap_probe::compile_to_ax): Update.
* printcmd.c (set_command): Update.
* ppc-linux-nat.c (ppc_linux_nat_target::check_condition):
Update.
* parser-defs.h (struct expr_builder) <set_operation>: New
method.
* parse.c (parse_exp_in_context, exp_uses_objfile): Update.
* expression.h (struct expression) <first_opcode>: Update.
<op>: New member.
* expprint.c (dump_raw_expression, dump_prefix_expression):
Update.
* expop.h (class var_value_operation) <get_symbol>: New method.
(class register_operation) <get_name>: New method.
(class equal_operation): No longer a typedef, now a subclass.
(class unop_memval_operation) <get_type>: New method.
(class assign_operation) <get_lhs>: New method.
(class unop_cast_operation) <get_type>: New method.
* eval.c (evaluate_expression, evaluate_type)
(evaluate_subexpression_type): Update.
(fetch_subexp_value): Add "op" parameter.
(parse_and_eval_type): Update.
* dtrace-probe.c (dtrace_probe::compile_to_ax): Update.
* breakpoint.c (update_watchpoint, watchpoint_check)
(watchpoint_exp_is_const, watch_command_1): Update.
* ax-gdb.c (gen_trace_for_expr, gen_eval_for_expr, gen_printf):
Update.
This implement function call operations.
The current function call code relies on some very lengthy code
(evaluate_funcall is 398 lines...) to distinguish between the
different opcodes that might appear in the callee position.
Rather than try to replicate this, and have a function that tried to
dissect many different kinds of operation subclass, this patch instead
puts the work into the callee. A new operation::evaluate_funcall
method is added, and then this is overridden in the classes that
require special treatment.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expression.h (class operation) <evaluate_funcall>: New methods.
* expop.h (class scope_operation) <evaluate_funcall>: New method.
(class var_value_operation) <evaluate_funcall>: New method.
(class structop_base_operation) <evaluate_funcall>: New method.
(class var_msym_value_operation) <evaluate_funcall>: New method.
(class structop_member_base): New class.
(class structop_member_operation): Derive from
structop_member_base.
(class structop_mptr_operation): Derive from
structop_member_base.
(class funcall_operation): New class.
* eval.c (operation::evaluate_funcall)
(var_value_operation::evaluate_funcall)
(scope_operation::evaluate_funcall)
(structop_member_base::evaluate_funcall)
(structop_base_operation::evaluate_funcall): New methods.
This adds class array_operation, which implements OP_ARRAY.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class array_operation): New.
* eval.c (array_operation::evaluate_struct_tuple)
(array_operation::evaluate): New methods.
This adds class adl_func_operation, which implements
argument-dependent lookup function calls.
Other function calls will be handled in a different way. However,
because ADL calls were created in a single spot in the C++ parser, and
because they had different semantics from the other cases, it was
convenient to treat them specially.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class adl_func_operation): New.
* eval.c (adl_func_operation::evaluate): New method.
This adds class multi_subscript_operation, which implements
MULTI_SUBSCRIPT.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class multi_subscript_operation): New.
* eval.c (multi_subscript_operation::evaluate): New method.
This adds class objc_msgcall_operation, which implements
OP_OBJC_MSGCALL.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (objc_msgcall_operation::evaluate): New method.
* c-exp.h (class objc_msgcall_operation): New.
This adds class assign_modify_operation, which implements
BINOP_ASSIGN_MODIFY.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class assign_modify_operation): New.
* eval.c (eval_binop_assign_modify): No longer static.
* ax-gdb.c (assign_modify_operation::do_generate_ax): New method.
This adds class type_instance_operation, which implements
TYPE_INSTANCE.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class type_instance_operation): New.
* eval.c (type_instance_operation::evaluate): New method.
This adds class unop_memval_operation and unop_memval_type_operation,
which implement UNOP_MEMVAL and UNOP_MEMVAL_TYPE.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class unop_memval_operation)
(class unop_memval_type_operation): New.
* eval.c (eval_op_memval): No longer static.
(unop_memval_operation::evaluate_for_address)
(unop_memval_type_operation::evaluate_for_address)
(unop_memval_operation::evaluate_for_sizeof)
(unop_memval_type_operation::evaluate_for_sizeof): New methods.
* ax-gdb.c (unop_memval_operation::do_generate_ax)
(unop_memval_type_operation::do_generate_ax): New methods.
This adds class unop_alignof_operation, which implements UNOP_ALIGNOF.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class unop_alignof_operation): New.
* eval.c (eval_op_alignof): No longer static.
This adds class type_operation, which implements OP_TYPE.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class type_operation): New.
* eval.c (eval_op_type): No longer static.
This implements the unary increment and decrement operations, "++" and
"--".
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (unop_incr_operation): New template.
(preinc_operation, predec_operation, postinc_operation)
(postdec_operation): New typedefs.
* eval.c (eval_op_preinc, eval_op_predec, eval_op_postinc)
(eval_op_postdec): No longer static.
This introduces a couple of new template classes and then uses them to
implement some simple unary operations.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (unary_ftype): New typedef.
(unop_operation, usual_ax_binop_operation): New templates.
(unary_plus_operation, unary_neg_operation)
(unary_complement_operation, unary_logical_not_operation): New
typedefs.
* eval.c (eval_op_plus, eval_op_neg, eval_op_complement)
(eval_op_lognot): No longer static.
* ax-gdb.c (gen_expr_unop): New function.
This adds class subscript_operation, which implements BINOP_SUBSCRIPT.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class subscript_operation): New.
* eval.c (eval_op_subscript): No longer static.
This adds two new template classes, binop_operation and
usual_ax_binop_operation, and then uses these to implement a number of
binary operations that follow similar patterns.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class binop_operation, class usual_ax_binop_operation):
New.
(exp_operation, intdiv_operation, mod_operation, mul_operation)
(div_operation, rem_operation, lsh_operation, rsh_operation)
(bitwise_and_operation, bitwise_ior_operation)
(bitwise_xor_operation): New typedefs.
* eval.c (eval_op_binary): No longer static.
This adds class structop_member_operation and structop_mptr_operation,
which implement STRUCTOP_MEMBER and STRUCTOP_MPTR.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class structop_member_operation)
(class structop_mptr_operation): New.
* eval.c (eval_op_member): No longer static.
This adds class structop_base_operation and structop_operation, which
implement STRUCTOP_STRUCT. The base class exists to unify the
completion code between STRUCTOP_STRUCT and STRUCTOP_PTR.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class structop_base_operation)
(class structop_operation): New.
* eval.c (eval_op_structop_struct): No longer static.
This adds class objc_selector_operation, which implements
OP_OBJC_SELECTOR.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_op_objc_selector): No longer static.
* c-exp.h (class objc_selector_operation): New.
This adds class objc_nsstring_operation, which implements
OP_OBJC_NSSTRING.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c: Include c-exp.h.
* c-exp.h (class objc_nsstring_operation): New.
This adds class ternop_slice_operation, which implements TERNOP_SLICE.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class ternop_slice_operation): New.
* eval.c (eval_op_ternop): No longer static.
This adds string_operation, which implements OP_STRING for most
languages (C has its own variant).
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class string_operation): New.
* eval.c (eval_op_string): No longer static.
This adds class register_operation, which implements OP_REGISTER.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class register_operation): New.
* eval.c (eval_op_register): No longer static.
* ax-gdb.c (register_operation::do_generate_ax): New method.
This adds class func_static_var_operation, which implements
OP_FUNC_STATIC_VAR.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class func_static_var_operation): New.
* eval.c (eval_op_func_static_var): No longer static.
This adds class var_entry_value_operation, which implements
OP_VAR_ENTRY_VALUE.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class var_entry_value_operation): New.
* eval.c (eval_op_var_entry_value): No longer static.
This adds class var_msym_value_operation, which implements
OP_VAR_MSYM_VALUE. A new method is added to class operation in order
to support a special case in minsym evaluation.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expression.h (class operation) <set_outermost>: New method.
* expop.h (class var_msym_value_operation): New.
* eval.c (eval_op_var_msym_value): No longer static.
(var_msym_value_operation::evaluate_for_address)
(var_msym_value_operation::evaluate_for_sizeof)
(var_msym_value_operation::evaluate_for_cast): New methods.
* ax-gdb.c (var_msym_value_operation::do_generate_ax): New
method.
This adds class scope_operation, an implementation of OP_SCOPE.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expop.h (class scope_operation): New.
* eval.c (eval_op_scope): No longer static.
(scope_operation::evaluate_for_address): New method.
* ax-gdb.c (scope_operation::do_generate_ax): New method.
This patch introduces class operation, the new base class for all
expression operations.
In the new approach, an operation is simply a class that presents a
certain interface. Operations own their operands, and management is
done via unique_ptr.
The operation interface is largely ad hoc, based on the evolution of
expression handling in GDB. Parts (for example,
evaluate_with_coercion) are probably redundant; however I took this
approach to try to avoid mixing different kinds of refactorings.
In some specific situations, rather than add a generic method across
the entire operation class hierarchy, I chose instead to use
dynamic_cast and specialized methods on certain concrete subclasses.
This will appear in some subsequent patches.
One goal of this work is to avoid the kinds of easy-to-make errors
that affected the old implementation. To this end, some helper
subclasses are also added here. These helpers automate the
implementation of the 'dump', 'uses_objfile', and 'constant_p'
methods. Nearly every concrete operation that is subsequently added
will use these facilities. (Note that the 'dump' implementation is
only outlined here, the body appears in the next patch.)
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* expression.h (expr::operation): New class.
(expr::make_operation): New function.
(expr::operation_up): New typedef.
* expop.h: New file.
* eval.c (operation::evaluate_for_cast)
(operation::evaluate_for_address, operation::evaluate_for_sizeof):
New methods.
* ax-gdb.c (operation::generate_ax): New method.
This splits MULTI_SUBSCRIPT into a new function for future use.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_multi_subscript): New function.
(evaluate_subexp_standard): Use it.
This splits OP_OBJC_MSGCALL into a new function for future use.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_op_objc_msgcall): New function.
(evaluate_subexp_standard): Use it.
This splits BINOP_ASSIGN_MODIFY into a new function for future use.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_binop_assign_modify): New function.
(evaluate_subexp_standard): Use it.
This splits a couple of address-of and sizeof functions, so that the
body can be reused by the (coming) new expression code.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (evaluate_subexp_for_address_base): New function.
(evaluate_subexp_for_address): Use it.
(evaluate_subexp_for_sizeof_base): New function.
(evaluate_subexp_for_sizeof): Use it.
This splits OP_TYPE into a new function for future use.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_op_type): New function.
(evaluate_subexp_standard): Use it.
This splits UNOP_POSTDECREMENT into a new function for future use.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_op_postdec): New function.
(evaluate_subexp_standard): Use it.
This splits UNOP_POSTINCREMENT into a new function for future use.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_op_postinc): New function.
(evaluate_subexp_standard): Use it.
This splits UNOP_PREDECREMENT into a new function for future use.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_op_predec): New file.
(evaluate_subexp_standard): Use it.
This splits UNOP_PREINCREMENT into a new function for future use.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_op_preinc): New function.
(evaluate_subexp_standard): Use it.
This splits UNOP_MEMVAL into a new function for future use. This new
function is also used to hande UNOP_MEMVAL_TYPE.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_op_memval): New function.
(evaluate_subexp_standard): Use it.
This splits UNOP_ALIGNOF into a new function for future use.
gdb/ChangeLog
2021-03-08 Tom Tromey <tom@tromey.com>
* eval.c (eval_op_alignof): New function.
(evaluate_subexp_standard): Use it.
