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Convert go-exp.y to use operations

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This converts the Go parser to generate operations rather than
exp_elements.

gdb/ChangeLog
2021-03-08  Tom Tromey  <tom@tromey.com>

	* go-exp.y: Create operations.
	(go_language::parser): Update.
This commit is contained in:
Tom Tromey
2021-03-08 07:27:57 -07:00
parent d182f27979
commit bb4e057488
2 changed files with 117 additions and 101 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2021-03-08 Tom Tromey <tom@tromey.com>
* go-exp.y: Create operations.
(go_language::parser): Update.
2021-03-08 Tom Tromey <tom@tromey.com>
* objc-lang.c (end_msglist): Create operations.

213
gdb/go-exp.y
View File

@ -64,6 +64,7 @@
#include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
#include "charset.h"
#include "block.h"
#include "expop.h"
#define parse_type(ps) builtin_type (ps->gdbarch ())
@ -115,6 +116,8 @@ static void yyerror (const char *);
/* YYSTYPE gets defined by %union. */
static int parse_number (struct parser_state *,
const char *, int, int, YYSTYPE *);
using namespace expr;
%}
%type <voidval> exp exp1 type_exp start variable lcurly
@ -193,77 +196,78 @@ start : exp1
;
type_exp: type
{ write_exp_elt_opcode (pstate, OP_TYPE);
write_exp_elt_type (pstate, $1);
write_exp_elt_opcode (pstate, OP_TYPE); }
{ pstate->push_new<type_operation> ($1); }
;
/* Expressions, including the comma operator. */
exp1 : exp
| exp1 ',' exp
{ write_exp_elt_opcode (pstate, BINOP_COMMA); }
{ pstate->wrap2<comma_operation> (); }
;
/* Expressions, not including the comma operator. */
exp : '*' exp %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_IND); }
{ pstate->wrap<unop_ind_operation> (); }
;
exp : '&' exp %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_ADDR); }
{ pstate->wrap<unop_addr_operation> (); }
;
exp : '-' exp %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_NEG); }
{ pstate->wrap<unary_neg_operation> (); }
;
exp : '+' exp %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_PLUS); }
{ pstate->wrap<unary_plus_operation> (); }
;
exp : '!' exp %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
{ pstate->wrap<unary_logical_not_operation> (); }
;
exp : '^' exp %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_COMPLEMENT); }
{ pstate->wrap<unary_complement_operation> (); }
;
exp : exp INCREMENT %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_POSTINCREMENT); }
{ pstate->wrap<postinc_operation> (); }
;
exp : exp DECREMENT %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_POSTDECREMENT); }
{ pstate->wrap<postdec_operation> (); }
;
/* foo->bar is not in Go. May want as a gdb extension. Later. */
exp : exp '.' name_not_typename
{ write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
write_exp_string (pstate, $3.stoken);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
{
pstate->push_new<structop_operation>
(pstate->pop (), copy_name ($3.stoken));
}
;
exp : exp '.' name_not_typename COMPLETE
{ pstate->mark_struct_expression ();
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
write_exp_string (pstate, $3.stoken);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
{
structop_base_operation *op
= new structop_operation (pstate->pop (),
copy_name ($3.stoken));
pstate->mark_struct_expression (op);
pstate->push (operation_up (op));
}
;
exp : exp '.' COMPLETE
{ struct stoken s;
pstate->mark_struct_expression ();
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
s.ptr = "";
s.length = 0;
write_exp_string (pstate, s);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
{
structop_base_operation *op
= new structop_operation (pstate->pop (), "");
pstate->mark_struct_expression (op);
pstate->push (operation_up (op));
}
;
exp : exp '[' exp1 ']'
{ write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
{ pstate->wrap2<subscript_operation> (); }
;
exp : exp '('
@ -271,10 +275,12 @@ exp : exp '('
being accumulated by an outer function call. */
{ pstate->start_arglist (); }
arglist ')' %prec LEFT_ARROW
{ write_exp_elt_opcode (pstate, OP_FUNCALL);
write_exp_elt_longcst (pstate,
pstate->end_arglist ());
write_exp_elt_opcode (pstate, OP_FUNCALL); }
{
std::vector<operation_up> args
= pstate->pop_vector (pstate->end_arglist ());
pstate->push_new<funcall_operation>
(pstate->pop (), std::move (args));
}
;
lcurly : '{'
@ -297,15 +303,17 @@ rcurly : '}'
;
exp : lcurly type rcurly exp %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_MEMVAL);
write_exp_elt_type (pstate, $2);
write_exp_elt_opcode (pstate, UNOP_MEMVAL); }
{
pstate->push_new<unop_memval_operation>
(pstate->pop (), $2);
}
;
exp : type '(' exp ')' %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_CAST);
write_exp_elt_type (pstate, $1);
write_exp_elt_opcode (pstate, UNOP_CAST); }
{
pstate->push_new<unop_cast_operation>
(pstate->pop (), $1);
}
;
exp : '(' exp1 ')'
@ -315,100 +323,110 @@ exp : '(' exp1 ')'
/* Binary operators in order of decreasing precedence. */
exp : exp '@' exp
{ write_exp_elt_opcode (pstate, BINOP_REPEAT); }
{ pstate->wrap2<repeat_operation> (); }
;
exp : exp '*' exp
{ write_exp_elt_opcode (pstate, BINOP_MUL); }
{ pstate->wrap2<mul_operation> (); }
;
exp : exp '/' exp
{ write_exp_elt_opcode (pstate, BINOP_DIV); }
{ pstate->wrap2<div_operation> (); }
;
exp : exp '%' exp
{ write_exp_elt_opcode (pstate, BINOP_REM); }
{ pstate->wrap2<rem_operation> (); }
;
exp : exp '+' exp
{ write_exp_elt_opcode (pstate, BINOP_ADD); }
{ pstate->wrap2<add_operation> (); }
;
exp : exp '-' exp
{ write_exp_elt_opcode (pstate, BINOP_SUB); }
{ pstate->wrap2<sub_operation> (); }
;
exp : exp LSH exp
{ write_exp_elt_opcode (pstate, BINOP_LSH); }
{ pstate->wrap2<lsh_operation> (); }
;
exp : exp RSH exp
{ write_exp_elt_opcode (pstate, BINOP_RSH); }
{ pstate->wrap2<rsh_operation> (); }
;
exp : exp EQUAL exp
{ write_exp_elt_opcode (pstate, BINOP_EQUAL); }
{ pstate->wrap2<equal_operation> (); }
;
exp : exp NOTEQUAL exp
{ write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
{ pstate->wrap2<notequal_operation> (); }
;
exp : exp LEQ exp
{ write_exp_elt_opcode (pstate, BINOP_LEQ); }
{ pstate->wrap2<leq_operation> (); }
;
exp : exp GEQ exp
{ write_exp_elt_opcode (pstate, BINOP_GEQ); }
{ pstate->wrap2<geq_operation> (); }
;
exp : exp '<' exp
{ write_exp_elt_opcode (pstate, BINOP_LESS); }
{ pstate->wrap2<less_operation> (); }
;
exp : exp '>' exp
{ write_exp_elt_opcode (pstate, BINOP_GTR); }
{ pstate->wrap2<gtr_operation> (); }
;
exp : exp '&' exp
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
{ pstate->wrap2<bitwise_and_operation> (); }
;
exp : exp '^' exp
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
{ pstate->wrap2<bitwise_xor_operation> (); }
;
exp : exp '|' exp
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
{ pstate->wrap2<bitwise_ior_operation> (); }
;
exp : exp ANDAND exp
{ write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
{ pstate->wrap2<logical_and_operation> (); }
;
exp : exp OROR exp
{ write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
{ pstate->wrap2<logical_or_operation> (); }
;
exp : exp '?' exp ':' exp %prec '?'
{ write_exp_elt_opcode (pstate, TERNOP_COND); }
{
operation_up last = pstate->pop ();
operation_up mid = pstate->pop ();
operation_up first = pstate->pop ();
pstate->push_new<ternop_cond_operation>
(std::move (first), std::move (mid),
std::move (last));
}
;
exp : exp '=' exp
{ write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
{ pstate->wrap2<assign_operation> (); }
;
exp : exp ASSIGN_MODIFY exp
{ write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
write_exp_elt_opcode (pstate, $2);
write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY); }
{
operation_up rhs = pstate->pop ();
operation_up lhs = pstate->pop ();
pstate->push_new<assign_modify_operation>
($2, std::move (lhs), std::move (rhs));
}
;
exp : INT
{ write_exp_elt_opcode (pstate, OP_LONG);
write_exp_elt_type (pstate, $1.type);
write_exp_elt_longcst (pstate, (LONGEST)($1.val));
write_exp_elt_opcode (pstate, OP_LONG); }
{
pstate->push_new<long_const_operation>
($1.type, $1.val);
}
;
exp : CHAR
@ -416,7 +434,7 @@ exp : CHAR
struct stoken_vector vec;
vec.len = 1;
vec.tokens = &$1;
write_exp_string_vector (pstate, $1.type, &vec);
pstate->push_c_string ($1.type, &vec);
}
;
@ -424,20 +442,20 @@ exp : NAME_OR_INT
{ YYSTYPE val;
parse_number (pstate, $1.stoken.ptr,
$1.stoken.length, 0, &val);
write_exp_elt_opcode (pstate, OP_LONG);
write_exp_elt_type (pstate, val.typed_val_int.type);
write_exp_elt_longcst (pstate, (LONGEST)
val.typed_val_int.val);
write_exp_elt_opcode (pstate, OP_LONG);
pstate->push_new<long_const_operation>
(val.typed_val_int.type,
val.typed_val_int.val);
}
;
exp : FLOAT
{ write_exp_elt_opcode (pstate, OP_FLOAT);
write_exp_elt_type (pstate, $1.type);
write_exp_elt_floatcst (pstate, $1.val);
write_exp_elt_opcode (pstate, OP_FLOAT); }
{
float_data data;
std::copy (std::begin ($1.val), std::end ($1.val),
std::begin (data));
pstate->push_new<float_const_operation> ($1.type, data);
}
;
exp : variable
@ -445,29 +463,26 @@ exp : variable
exp : DOLLAR_VARIABLE
{
write_dollar_variable (pstate, $1);
pstate->push_dollar ($1);
}
;
exp : SIZEOF_KEYWORD '(' type ')' %prec UNARY
{
/* TODO(dje): Go objects in structs. */
write_exp_elt_opcode (pstate, OP_LONG);
/* TODO(dje): What's the right type here? */
write_exp_elt_type
(pstate,
parse_type (pstate)->builtin_unsigned_int);
struct type *size_type
= parse_type (pstate)->builtin_unsigned_int;
$3 = check_typedef ($3);
write_exp_elt_longcst (pstate,
(LONGEST) TYPE_LENGTH ($3));
write_exp_elt_opcode (pstate, OP_LONG);
pstate->push_new<long_const_operation>
(size_type, (LONGEST) TYPE_LENGTH ($3));
}
;
exp : SIZEOF_KEYWORD '(' exp ')' %prec UNARY
{
/* TODO(dje): Go objects in structs. */
write_exp_elt_opcode (pstate, UNOP_SIZEOF);
pstate->wrap<unop_sizeof_operation> ();
}
string_exp:
@ -510,8 +525,8 @@ exp : string_exp %prec ABOVE_COMMA
{
int i;
write_exp_string_vector (pstate, 0 /*always utf8*/,
&$1);
/* Always utf8. */
pstate->push_c_string (0, &$1);
for (i = 0; i < $1.len; ++i)
free ($1.tokens[i].ptr);
free ($1.tokens);
@ -519,15 +534,11 @@ exp : string_exp %prec ABOVE_COMMA
;
exp : TRUE_KEYWORD
{ write_exp_elt_opcode (pstate, OP_BOOL);
write_exp_elt_longcst (pstate, (LONGEST) $1);
write_exp_elt_opcode (pstate, OP_BOOL); }
{ pstate->push_new<bool_operation> ($1); }
;
exp : FALSE_KEYWORD
{ write_exp_elt_opcode (pstate, OP_BOOL);
write_exp_elt_longcst (pstate, (LONGEST) $1);
write_exp_elt_opcode (pstate, OP_BOOL); }
{ pstate->push_new<bool_operation> ($1); }
;
variable: name_not_typename ENTRY
@ -540,9 +551,7 @@ variable: name_not_typename ENTRY
"parameters, not for \"%s\""),
copy_name ($1.stoken).c_str ());
write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
write_exp_elt_sym (pstate, sym);
write_exp_elt_opcode (pstate, OP_VAR_ENTRY_VALUE);
pstate->push_new<var_entry_value_operation> (sym);
}
;
@ -554,10 +563,8 @@ variable: name_not_typename
if (symbol_read_needs_frame (sym.symbol))
pstate->block_tracker->update (sym);
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
write_exp_elt_block (pstate, sym.block);
write_exp_elt_sym (pstate, sym.symbol);
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
pstate->push_new<var_value_operation>
(sym.symbol, sym.block);
}
else if ($1.is_a_field_of_this)
{
@ -573,7 +580,8 @@ variable: name_not_typename
msymbol =
lookup_bound_minimal_symbol (arg.c_str ());
if (msymbol.minsym != NULL)
write_exp_msymbol (pstate, msymbol);
pstate->push_new<var_msym_value_operation>
(msymbol.minsym, msymbol.objfile);
else if (!have_full_symbols ()
&& !have_partial_symbols ())
error (_("No symbol table is loaded. "
@ -1572,7 +1580,10 @@ go_language::parser (struct parser_state *par_state) const
popping = 0;
name_obstack.clear ();
return yyparse ();
int result = yyparse ();
if (!result)
pstate->set_operation (pstate->pop ());
return result;
}
static void