mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-11-30 23:40:24 +00:00
22e048c9dd
* ada-lang.c: * ada-tasks.c: * ada-varobj.c: * amd64-darwin-tdep.c: * arm-symbian-tdep.c: * arm-tdep.c: * avr-tdep.c: * ax-gdb.c: * bfin-linux-tdep.c: * breakpoint.c: * c-valprint.c: * cli/cli-cmds.c: * coffread.c: * cp-support.c: * cris-tdep.c: * dwarf2-frame-tailcall.c: * dwarf2-frame.c: * dwarf2expr.c: * dwarf2loc.c: * dwarf2read.c: * elfread.c: * eval.c: * expprint.c: * f-valprint.c: * frv-tdep.c: * h8300-tdep.c: * hppa-hpux-tdep.c: * hppa-tdep.c: * hppanbsd-tdep.c: * i386-nto-tdep.c: * i386-tdep.c: * i387-tdep.c: * ia64-tdep.c: * jit.c: * linespec.c: * linux-tdep.c: * lm32-tdep.c: * m2-valprint.c: * m32c-tdep.c: * m32r-rom.c: * m32r-tdep.c: * m68k-tdep.c: * m68klinux-tdep.c: * mi/mi-main.c: * microblaze-tdep.c: * mips-linux-tdep.c: * mips-tdep.c: * mn10300-tdep.c: * p-valprint.c: * parse.c: * ppc-linux-tdep.c: * ppc-sysv-tdep.c: * printcmd.c: * python/py-finishbreakpoint.c: * python/py-inferior.c: * python/py-infthread.c: * python/py-type.c: * python/python.c: * remote-fileio.c: * remote-m32r-sdi.c: * remote-mips.c: * reverse.c: * rl78-tdep.c: * rs6000-aix-tdep.c: * rs6000-tdep.c: * s390-tdep.c: * score-tdep.c: * sh64-tdep.c: * skip.c: * solib-darwin.c: * solib-dsbt.c: * solib-frv.c: * sparc-tdep.c: * spu-multiarch.c: * spu-tdep.c: * stack.c: * symfile.c: * symtab.c: * tic6x-tdep.c: * tracepoint.c: * v850-tdep.c: * valarith.c: * valprint.c: * value.c: * xcoffread.c: * xtensa-tdep.c: * ada-lang.c: * ada-tasks.c: * ada-varobj.c: * amd64-darwin-tdep.c: * arm-symbian-tdep.c: * arm-tdep.c: Delete unused variables.
1624 lines
40 KiB
Plaintext
1624 lines
40 KiB
Plaintext
/* YACC parser for Go expressions, for GDB.
|
||
|
||
Copyright (C) 2012 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
/* This file is derived from c-exp.y, p-exp.y. */
|
||
|
||
/* Parse a Go expression from text in a string,
|
||
and return the result as a struct expression pointer.
|
||
That structure contains arithmetic operations in reverse polish,
|
||
with constants represented by operations that are followed by special data.
|
||
See expression.h for the details of the format.
|
||
What is important here is that it can be built up sequentially
|
||
during the process of parsing; the lower levels of the tree always
|
||
come first in the result.
|
||
|
||
Note that malloc's and realloc's in this file are transformed to
|
||
xmalloc and xrealloc respectively by the same sed command in the
|
||
makefile that remaps any other malloc/realloc inserted by the parser
|
||
generator. Doing this with #defines and trying to control the interaction
|
||
with include files (<malloc.h> and <stdlib.h> for example) just became
|
||
too messy, particularly when such includes can be inserted at random
|
||
times by the parser generator. */
|
||
|
||
/* Known bugs or limitations:
|
||
|
||
- Unicode
|
||
- &^
|
||
- '_' (blank identifier)
|
||
- automatic deref of pointers
|
||
- method expressions
|
||
- interfaces, channels, etc.
|
||
|
||
And lots of other things.
|
||
I'm sure there's some cleanup to do.
|
||
*/
|
||
|
||
%{
|
||
|
||
#include "defs.h"
|
||
#include "gdb_string.h"
|
||
#include <ctype.h>
|
||
#include "expression.h"
|
||
#include "value.h"
|
||
#include "parser-defs.h"
|
||
#include "language.h"
|
||
#include "c-lang.h"
|
||
#include "go-lang.h"
|
||
#include "bfd.h" /* Required by objfiles.h. */
|
||
#include "symfile.h" /* Required by objfiles.h. */
|
||
#include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
|
||
#include "charset.h"
|
||
#include "block.h"
|
||
|
||
#define parse_type builtin_type (parse_gdbarch)
|
||
|
||
/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
|
||
as well as gratuitiously global symbol names, so we can have multiple
|
||
yacc generated parsers in gdb. Note that these are only the variables
|
||
produced by yacc. If other parser generators (bison, byacc, etc) produce
|
||
additional global names that conflict at link time, then those parser
|
||
generators need to be fixed instead of adding those names to this list. */
|
||
|
||
#define yymaxdepth go_maxdepth
|
||
#define yyparse go_parse_internal
|
||
#define yylex go_lex
|
||
#define yyerror go_error
|
||
#define yylval go_lval
|
||
#define yychar go_char
|
||
#define yydebug go_debug
|
||
#define yypact go_pact
|
||
#define yyr1 go_r1
|
||
#define yyr2 go_r2
|
||
#define yydef go_def
|
||
#define yychk go_chk
|
||
#define yypgo go_pgo
|
||
#define yyact go_act
|
||
#define yyexca go_exca
|
||
#define yyerrflag go_errflag
|
||
#define yynerrs go_nerrs
|
||
#define yyps go_ps
|
||
#define yypv go_pv
|
||
#define yys go_s
|
||
#define yy_yys go_yys
|
||
#define yystate go_state
|
||
#define yytmp go_tmp
|
||
#define yyv go_v
|
||
#define yy_yyv go_yyv
|
||
#define yyval go_val
|
||
#define yylloc go_lloc
|
||
#define yyreds go_reds /* With YYDEBUG defined */
|
||
#define yytoks go_toks /* With YYDEBUG defined */
|
||
#define yyname go_name /* With YYDEBUG defined */
|
||
#define yyrule go_rule /* With YYDEBUG defined */
|
||
#define yylhs go_yylhs
|
||
#define yylen go_yylen
|
||
#define yydefred go_yydefred
|
||
#define yydgoto go_yydgoto
|
||
#define yysindex go_yysindex
|
||
#define yyrindex go_yyrindex
|
||
#define yygindex go_yygindex
|
||
#define yytable go_yytable
|
||
#define yycheck go_yycheck
|
||
|
||
#ifndef YYDEBUG
|
||
#define YYDEBUG 1 /* Default to yydebug support */
|
||
#endif
|
||
|
||
#define YYFPRINTF parser_fprintf
|
||
|
||
int yyparse (void);
|
||
|
||
static int yylex (void);
|
||
|
||
void yyerror (char *);
|
||
|
||
%}
|
||
|
||
/* Although the yacc "value" of an expression is not used,
|
||
since the result is stored in the structure being created,
|
||
other node types do have values. */
|
||
|
||
%union
|
||
{
|
||
LONGEST lval;
|
||
struct {
|
||
LONGEST val;
|
||
struct type *type;
|
||
} typed_val_int;
|
||
struct {
|
||
DOUBLEST dval;
|
||
struct type *type;
|
||
} typed_val_float;
|
||
struct stoken sval;
|
||
struct symtoken ssym;
|
||
struct type *tval;
|
||
struct typed_stoken tsval;
|
||
struct ttype tsym;
|
||
int voidval;
|
||
enum exp_opcode opcode;
|
||
struct internalvar *ivar;
|
||
struct stoken_vector svec;
|
||
}
|
||
|
||
%{
|
||
/* YYSTYPE gets defined by %union. */
|
||
static int parse_number (char *, int, int, YYSTYPE *);
|
||
static int parse_go_float (struct gdbarch *gdbarch, const char *p, int len,
|
||
DOUBLEST *d, struct type **t);
|
||
%}
|
||
|
||
%type <voidval> exp exp1 type_exp start variable lcurly
|
||
%type <lval> rcurly
|
||
%type <tval> type
|
||
|
||
%token <typed_val_int> INT
|
||
%token <typed_val_float> FLOAT
|
||
|
||
/* Both NAME and TYPENAME tokens represent symbols in the input,
|
||
and both convey their data as strings.
|
||
But a TYPENAME is a string that happens to be defined as a type
|
||
or builtin type name (such as int or char)
|
||
and a NAME is any other symbol.
|
||
Contexts where this distinction is not important can use the
|
||
nonterminal "name", which matches either NAME or TYPENAME. */
|
||
|
||
%token <tsval> RAW_STRING
|
||
%token <tsval> STRING
|
||
%token <tsval> CHAR
|
||
%token <ssym> NAME
|
||
%token <tsym> TYPENAME /* Not TYPE_NAME cus already taken. */
|
||
%token <voidval> COMPLETE
|
||
/*%type <sval> name*/
|
||
%type <svec> string_exp
|
||
%type <ssym> name_not_typename
|
||
|
||
/* A NAME_OR_INT is a symbol which is not known in the symbol table,
|
||
but which would parse as a valid number in the current input radix.
|
||
E.g. "c" when input_radix==16. Depending on the parse, it will be
|
||
turned into a name or into a number. */
|
||
%token <ssym> NAME_OR_INT
|
||
|
||
%token <lval> TRUE_KEYWORD FALSE_KEYWORD
|
||
%token STRUCT_KEYWORD INTERFACE_KEYWORD TYPE_KEYWORD CHAN_KEYWORD
|
||
%token SIZEOF_KEYWORD
|
||
%token LEN_KEYWORD CAP_KEYWORD
|
||
%token NEW_KEYWORD
|
||
%token IOTA_KEYWORD NIL_KEYWORD
|
||
%token CONST_KEYWORD
|
||
%token DOTDOTDOT
|
||
%token ENTRY
|
||
%token ERROR
|
||
|
||
/* Special type cases. */
|
||
%token BYTE_KEYWORD /* An alias of uint8. */
|
||
|
||
%token <sval> DOLLAR_VARIABLE
|
||
|
||
%token <opcode> ASSIGN_MODIFY
|
||
|
||
%left ','
|
||
%left ABOVE_COMMA
|
||
%right '=' ASSIGN_MODIFY
|
||
%right '?'
|
||
%left OROR
|
||
%left ANDAND
|
||
%left '|'
|
||
%left '^'
|
||
%left '&'
|
||
%left ANDNOT
|
||
%left EQUAL NOTEQUAL
|
||
%left '<' '>' LEQ GEQ
|
||
%left LSH RSH
|
||
%left '@'
|
||
%left '+' '-'
|
||
%left '*' '/' '%'
|
||
%right UNARY INCREMENT DECREMENT
|
||
%right LEFT_ARROW '.' '[' '('
|
||
|
||
|
||
%%
|
||
|
||
start : exp1
|
||
| type_exp
|
||
;
|
||
|
||
type_exp: type
|
||
{ write_exp_elt_opcode(OP_TYPE);
|
||
write_exp_elt_type($1);
|
||
write_exp_elt_opcode(OP_TYPE); }
|
||
;
|
||
|
||
/* Expressions, including the comma operator. */
|
||
exp1 : exp
|
||
| exp1 ',' exp
|
||
{ write_exp_elt_opcode (BINOP_COMMA); }
|
||
;
|
||
|
||
/* Expressions, not including the comma operator. */
|
||
exp : '*' exp %prec UNARY
|
||
{ write_exp_elt_opcode (UNOP_IND); }
|
||
;
|
||
|
||
exp : '&' exp %prec UNARY
|
||
{ write_exp_elt_opcode (UNOP_ADDR); }
|
||
;
|
||
|
||
exp : '-' exp %prec UNARY
|
||
{ write_exp_elt_opcode (UNOP_NEG); }
|
||
;
|
||
|
||
exp : '+' exp %prec UNARY
|
||
{ write_exp_elt_opcode (UNOP_PLUS); }
|
||
;
|
||
|
||
exp : '!' exp %prec UNARY
|
||
{ write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
|
||
;
|
||
|
||
exp : '^' exp %prec UNARY
|
||
{ write_exp_elt_opcode (UNOP_COMPLEMENT); }
|
||
;
|
||
|
||
exp : exp INCREMENT %prec UNARY
|
||
{ write_exp_elt_opcode (UNOP_POSTINCREMENT); }
|
||
;
|
||
|
||
exp : exp DECREMENT %prec UNARY
|
||
{ write_exp_elt_opcode (UNOP_POSTDECREMENT); }
|
||
;
|
||
|
||
/* foo->bar is not in Go. May want as a gdb extension. Later. */
|
||
|
||
exp : exp '.' name_not_typename
|
||
{ write_exp_elt_opcode (STRUCTOP_STRUCT);
|
||
write_exp_string ($3.stoken);
|
||
write_exp_elt_opcode (STRUCTOP_STRUCT); }
|
||
;
|
||
|
||
exp : exp '.' name_not_typename COMPLETE
|
||
{ mark_struct_expression ();
|
||
write_exp_elt_opcode (STRUCTOP_STRUCT);
|
||
write_exp_string ($3.stoken);
|
||
write_exp_elt_opcode (STRUCTOP_STRUCT); }
|
||
;
|
||
|
||
exp : exp '.' COMPLETE
|
||
{ struct stoken s;
|
||
mark_struct_expression ();
|
||
write_exp_elt_opcode (STRUCTOP_STRUCT);
|
||
s.ptr = "";
|
||
s.length = 0;
|
||
write_exp_string (s);
|
||
write_exp_elt_opcode (STRUCTOP_STRUCT); }
|
||
;
|
||
|
||
exp : exp '[' exp1 ']'
|
||
{ write_exp_elt_opcode (BINOP_SUBSCRIPT); }
|
||
;
|
||
|
||
exp : exp '('
|
||
/* This is to save the value of arglist_len
|
||
being accumulated by an outer function call. */
|
||
{ start_arglist (); }
|
||
arglist ')' %prec LEFT_ARROW
|
||
{ write_exp_elt_opcode (OP_FUNCALL);
|
||
write_exp_elt_longcst ((LONGEST) end_arglist ());
|
||
write_exp_elt_opcode (OP_FUNCALL); }
|
||
;
|
||
|
||
lcurly : '{'
|
||
{ start_arglist (); }
|
||
;
|
||
|
||
arglist :
|
||
;
|
||
|
||
arglist : exp
|
||
{ arglist_len = 1; }
|
||
;
|
||
|
||
arglist : arglist ',' exp %prec ABOVE_COMMA
|
||
{ arglist_len++; }
|
||
;
|
||
|
||
rcurly : '}'
|
||
{ $$ = end_arglist () - 1; }
|
||
;
|
||
|
||
exp : lcurly type rcurly exp %prec UNARY
|
||
{ write_exp_elt_opcode (UNOP_MEMVAL);
|
||
write_exp_elt_type ($2);
|
||
write_exp_elt_opcode (UNOP_MEMVAL); }
|
||
;
|
||
|
||
exp : type '(' exp ')' %prec UNARY
|
||
{ write_exp_elt_opcode (UNOP_CAST);
|
||
write_exp_elt_type ($1);
|
||
write_exp_elt_opcode (UNOP_CAST); }
|
||
;
|
||
|
||
exp : '(' exp1 ')'
|
||
{ }
|
||
;
|
||
|
||
/* Binary operators in order of decreasing precedence. */
|
||
|
||
exp : exp '@' exp
|
||
{ write_exp_elt_opcode (BINOP_REPEAT); }
|
||
;
|
||
|
||
exp : exp '*' exp
|
||
{ write_exp_elt_opcode (BINOP_MUL); }
|
||
;
|
||
|
||
exp : exp '/' exp
|
||
{ write_exp_elt_opcode (BINOP_DIV); }
|
||
;
|
||
|
||
exp : exp '%' exp
|
||
{ write_exp_elt_opcode (BINOP_REM); }
|
||
;
|
||
|
||
exp : exp '+' exp
|
||
{ write_exp_elt_opcode (BINOP_ADD); }
|
||
;
|
||
|
||
exp : exp '-' exp
|
||
{ write_exp_elt_opcode (BINOP_SUB); }
|
||
;
|
||
|
||
exp : exp LSH exp
|
||
{ write_exp_elt_opcode (BINOP_LSH); }
|
||
;
|
||
|
||
exp : exp RSH exp
|
||
{ write_exp_elt_opcode (BINOP_RSH); }
|
||
;
|
||
|
||
exp : exp EQUAL exp
|
||
{ write_exp_elt_opcode (BINOP_EQUAL); }
|
||
;
|
||
|
||
exp : exp NOTEQUAL exp
|
||
{ write_exp_elt_opcode (BINOP_NOTEQUAL); }
|
||
;
|
||
|
||
exp : exp LEQ exp
|
||
{ write_exp_elt_opcode (BINOP_LEQ); }
|
||
;
|
||
|
||
exp : exp GEQ exp
|
||
{ write_exp_elt_opcode (BINOP_GEQ); }
|
||
;
|
||
|
||
exp : exp '<' exp
|
||
{ write_exp_elt_opcode (BINOP_LESS); }
|
||
;
|
||
|
||
exp : exp '>' exp
|
||
{ write_exp_elt_opcode (BINOP_GTR); }
|
||
;
|
||
|
||
exp : exp '&' exp
|
||
{ write_exp_elt_opcode (BINOP_BITWISE_AND); }
|
||
;
|
||
|
||
exp : exp '^' exp
|
||
{ write_exp_elt_opcode (BINOP_BITWISE_XOR); }
|
||
;
|
||
|
||
exp : exp '|' exp
|
||
{ write_exp_elt_opcode (BINOP_BITWISE_IOR); }
|
||
;
|
||
|
||
exp : exp ANDAND exp
|
||
{ write_exp_elt_opcode (BINOP_LOGICAL_AND); }
|
||
;
|
||
|
||
exp : exp OROR exp
|
||
{ write_exp_elt_opcode (BINOP_LOGICAL_OR); }
|
||
;
|
||
|
||
exp : exp '?' exp ':' exp %prec '?'
|
||
{ write_exp_elt_opcode (TERNOP_COND); }
|
||
;
|
||
|
||
exp : exp '=' exp
|
||
{ write_exp_elt_opcode (BINOP_ASSIGN); }
|
||
;
|
||
|
||
exp : exp ASSIGN_MODIFY exp
|
||
{ write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
|
||
write_exp_elt_opcode ($2);
|
||
write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
|
||
;
|
||
|
||
exp : INT
|
||
{ write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type ($1.type);
|
||
write_exp_elt_longcst ((LONGEST)($1.val));
|
||
write_exp_elt_opcode (OP_LONG); }
|
||
;
|
||
|
||
exp : CHAR
|
||
{
|
||
struct stoken_vector vec;
|
||
vec.len = 1;
|
||
vec.tokens = &$1;
|
||
write_exp_string_vector ($1.type, &vec);
|
||
}
|
||
;
|
||
|
||
exp : NAME_OR_INT
|
||
{ YYSTYPE val;
|
||
parse_number ($1.stoken.ptr, $1.stoken.length,
|
||
0, &val);
|
||
write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type (val.typed_val_int.type);
|
||
write_exp_elt_longcst ((LONGEST)
|
||
val.typed_val_int.val);
|
||
write_exp_elt_opcode (OP_LONG);
|
||
}
|
||
;
|
||
|
||
|
||
exp : FLOAT
|
||
{ write_exp_elt_opcode (OP_DOUBLE);
|
||
write_exp_elt_type ($1.type);
|
||
write_exp_elt_dblcst ($1.dval);
|
||
write_exp_elt_opcode (OP_DOUBLE); }
|
||
;
|
||
|
||
exp : variable
|
||
;
|
||
|
||
exp : DOLLAR_VARIABLE
|
||
{
|
||
write_dollar_variable ($1);
|
||
}
|
||
;
|
||
|
||
exp : SIZEOF_KEYWORD '(' type ')' %prec UNARY
|
||
{
|
||
/* TODO(dje): Go objects in structs. */
|
||
write_exp_elt_opcode (OP_LONG);
|
||
/* TODO(dje): What's the right type here? */
|
||
write_exp_elt_type (parse_type->builtin_unsigned_int);
|
||
CHECK_TYPEDEF ($3);
|
||
write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
|
||
write_exp_elt_opcode (OP_LONG);
|
||
}
|
||
;
|
||
|
||
exp : SIZEOF_KEYWORD '(' exp ')' %prec UNARY
|
||
{
|
||
/* TODO(dje): Go objects in structs. */
|
||
write_exp_elt_opcode (UNOP_SIZEOF);
|
||
}
|
||
|
||
string_exp:
|
||
STRING
|
||
{
|
||
/* We copy the string here, and not in the
|
||
lexer, to guarantee that we do not leak a
|
||
string. */
|
||
/* Note that we NUL-terminate here, but just
|
||
for convenience. */
|
||
struct typed_stoken *vec = XNEW (struct typed_stoken);
|
||
$$.len = 1;
|
||
$$.tokens = vec;
|
||
|
||
vec->type = $1.type;
|
||
vec->length = $1.length;
|
||
vec->ptr = malloc ($1.length + 1);
|
||
memcpy (vec->ptr, $1.ptr, $1.length + 1);
|
||
}
|
||
|
||
| string_exp '+' STRING
|
||
{
|
||
/* Note that we NUL-terminate here, but just
|
||
for convenience. */
|
||
char *p;
|
||
++$$.len;
|
||
$$.tokens = realloc ($$.tokens,
|
||
$$.len * sizeof (struct typed_stoken));
|
||
|
||
p = malloc ($3.length + 1);
|
||
memcpy (p, $3.ptr, $3.length + 1);
|
||
|
||
$$.tokens[$$.len - 1].type = $3.type;
|
||
$$.tokens[$$.len - 1].length = $3.length;
|
||
$$.tokens[$$.len - 1].ptr = p;
|
||
}
|
||
;
|
||
|
||
exp : string_exp %prec ABOVE_COMMA
|
||
{
|
||
int i;
|
||
|
||
write_exp_string_vector (0 /*always utf8*/, &$1);
|
||
for (i = 0; i < $1.len; ++i)
|
||
free ($1.tokens[i].ptr);
|
||
free ($1.tokens);
|
||
}
|
||
;
|
||
|
||
exp : TRUE_KEYWORD
|
||
{ write_exp_elt_opcode (OP_BOOL);
|
||
write_exp_elt_longcst ((LONGEST) $1);
|
||
write_exp_elt_opcode (OP_BOOL); }
|
||
;
|
||
|
||
exp : FALSE_KEYWORD
|
||
{ write_exp_elt_opcode (OP_BOOL);
|
||
write_exp_elt_longcst ((LONGEST) $1);
|
||
write_exp_elt_opcode (OP_BOOL); }
|
||
;
|
||
|
||
variable: name_not_typename ENTRY
|
||
{ struct symbol *sym = $1.sym;
|
||
|
||
if (sym == NULL
|
||
|| !SYMBOL_IS_ARGUMENT (sym)
|
||
|| !symbol_read_needs_frame (sym))
|
||
error (_("@entry can be used only for function "
|
||
"parameters, not for \"%s\""),
|
||
copy_name ($1.stoken));
|
||
|
||
write_exp_elt_opcode (OP_VAR_ENTRY_VALUE);
|
||
write_exp_elt_sym (sym);
|
||
write_exp_elt_opcode (OP_VAR_ENTRY_VALUE);
|
||
}
|
||
;
|
||
|
||
variable: name_not_typename
|
||
{ struct symbol *sym = $1.sym;
|
||
|
||
if (sym)
|
||
{
|
||
if (symbol_read_needs_frame (sym))
|
||
{
|
||
if (innermost_block == 0
|
||
|| contained_in (block_found,
|
||
innermost_block))
|
||
innermost_block = block_found;
|
||
}
|
||
|
||
write_exp_elt_opcode (OP_VAR_VALUE);
|
||
/* We want to use the selected frame, not
|
||
another more inner frame which happens to
|
||
be in the same block. */
|
||
write_exp_elt_block (NULL);
|
||
write_exp_elt_sym (sym);
|
||
write_exp_elt_opcode (OP_VAR_VALUE);
|
||
}
|
||
else if ($1.is_a_field_of_this)
|
||
{
|
||
/* TODO(dje): Can we get here?
|
||
E.g., via a mix of c++ and go? */
|
||
gdb_assert_not_reached ("go with `this' field");
|
||
}
|
||
else
|
||
{
|
||
struct minimal_symbol *msymbol;
|
||
char *arg = copy_name ($1.stoken);
|
||
|
||
msymbol =
|
||
lookup_minimal_symbol (arg, NULL, NULL);
|
||
if (msymbol != NULL)
|
||
write_exp_msymbol (msymbol);
|
||
else if (!have_full_symbols ()
|
||
&& !have_partial_symbols ())
|
||
error (_("No symbol table is loaded. "
|
||
"Use the \"file\" command."));
|
||
else
|
||
error (_("No symbol \"%s\" in current context."),
|
||
copy_name ($1.stoken));
|
||
}
|
||
}
|
||
;
|
||
|
||
/* TODO
|
||
method_exp: PACKAGENAME '.' name '.' name
|
||
{
|
||
}
|
||
;
|
||
*/
|
||
|
||
type /* Implements (approximately): [*] type-specifier */
|
||
: '*' type
|
||
{ $$ = lookup_pointer_type ($2); }
|
||
| TYPENAME
|
||
{ $$ = $1.type; }
|
||
/*
|
||
| STRUCT_KEYWORD name
|
||
{ $$ = lookup_struct (copy_name ($2),
|
||
expression_context_block); }
|
||
*/
|
||
| BYTE_KEYWORD
|
||
{ $$ = builtin_go_type (parse_gdbarch)
|
||
->builtin_uint8; }
|
||
;
|
||
|
||
/* TODO
|
||
name : NAME { $$ = $1.stoken; }
|
||
| TYPENAME { $$ = $1.stoken; }
|
||
| NAME_OR_INT { $$ = $1.stoken; }
|
||
;
|
||
*/
|
||
|
||
name_not_typename
|
||
: NAME
|
||
/* These would be useful if name_not_typename was useful, but it is just
|
||
a fake for "variable", so these cause reduce/reduce conflicts because
|
||
the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
|
||
=exp) or just an exp. If name_not_typename was ever used in an lvalue
|
||
context where only a name could occur, this might be useful.
|
||
| NAME_OR_INT
|
||
*/
|
||
;
|
||
|
||
%%
|
||
|
||
/* Wrapper on parse_c_float to get the type right for Go. */
|
||
|
||
static int
|
||
parse_go_float (struct gdbarch *gdbarch, const char *p, int len,
|
||
DOUBLEST *d, struct type **t)
|
||
{
|
||
int result = parse_c_float (gdbarch, p, len, d, t);
|
||
const struct builtin_type *builtin_types = builtin_type (gdbarch);
|
||
const struct builtin_go_type *builtin_go_types = builtin_go_type (gdbarch);
|
||
|
||
if (*t == builtin_types->builtin_float)
|
||
*t = builtin_go_types->builtin_float32;
|
||
else if (*t == builtin_types->builtin_double)
|
||
*t = builtin_go_types->builtin_float64;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Take care of parsing a number (anything that starts with a digit).
|
||
Set yylval and return the token type; update lexptr.
|
||
LEN is the number of characters in it. */
|
||
|
||
/* FIXME: Needs some error checking for the float case. */
|
||
/* FIXME(dje): IWBN to use c-exp.y's parse_number if we could.
|
||
That will require moving the guts into a function that we both call
|
||
as our YYSTYPE is different than c-exp.y's */
|
||
|
||
static int
|
||
parse_number (char *p, int len, int parsed_float, YYSTYPE *putithere)
|
||
{
|
||
/* FIXME: Shouldn't these be unsigned? We don't deal with negative values
|
||
here, and we do kind of silly things like cast to unsigned. */
|
||
LONGEST n = 0;
|
||
LONGEST prevn = 0;
|
||
ULONGEST un;
|
||
|
||
int i = 0;
|
||
int c;
|
||
int base = input_radix;
|
||
int unsigned_p = 0;
|
||
|
||
/* Number of "L" suffixes encountered. */
|
||
int long_p = 0;
|
||
|
||
/* We have found a "L" or "U" suffix. */
|
||
int found_suffix = 0;
|
||
|
||
ULONGEST high_bit;
|
||
struct type *signed_type;
|
||
struct type *unsigned_type;
|
||
|
||
if (parsed_float)
|
||
{
|
||
if (! parse_go_float (parse_gdbarch, p, len,
|
||
&putithere->typed_val_float.dval,
|
||
&putithere->typed_val_float.type))
|
||
return ERROR;
|
||
return FLOAT;
|
||
}
|
||
|
||
/* Handle base-switching prefixes 0x, 0t, 0d, 0. */
|
||
if (p[0] == '0')
|
||
switch (p[1])
|
||
{
|
||
case 'x':
|
||
case 'X':
|
||
if (len >= 3)
|
||
{
|
||
p += 2;
|
||
base = 16;
|
||
len -= 2;
|
||
}
|
||
break;
|
||
|
||
case 'b':
|
||
case 'B':
|
||
if (len >= 3)
|
||
{
|
||
p += 2;
|
||
base = 2;
|
||
len -= 2;
|
||
}
|
||
break;
|
||
|
||
case 't':
|
||
case 'T':
|
||
case 'd':
|
||
case 'D':
|
||
if (len >= 3)
|
||
{
|
||
p += 2;
|
||
base = 10;
|
||
len -= 2;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
base = 8;
|
||
break;
|
||
}
|
||
|
||
while (len-- > 0)
|
||
{
|
||
c = *p++;
|
||
if (c >= 'A' && c <= 'Z')
|
||
c += 'a' - 'A';
|
||
if (c != 'l' && c != 'u')
|
||
n *= base;
|
||
if (c >= '0' && c <= '9')
|
||
{
|
||
if (found_suffix)
|
||
return ERROR;
|
||
n += i = c - '0';
|
||
}
|
||
else
|
||
{
|
||
if (base > 10 && c >= 'a' && c <= 'f')
|
||
{
|
||
if (found_suffix)
|
||
return ERROR;
|
||
n += i = c - 'a' + 10;
|
||
}
|
||
else if (c == 'l')
|
||
{
|
||
++long_p;
|
||
found_suffix = 1;
|
||
}
|
||
else if (c == 'u')
|
||
{
|
||
unsigned_p = 1;
|
||
found_suffix = 1;
|
||
}
|
||
else
|
||
return ERROR; /* Char not a digit */
|
||
}
|
||
if (i >= base)
|
||
return ERROR; /* Invalid digit in this base. */
|
||
|
||
/* Portably test for overflow (only works for nonzero values, so make
|
||
a second check for zero). FIXME: Can't we just make n and prevn
|
||
unsigned and avoid this? */
|
||
if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
|
||
unsigned_p = 1; /* Try something unsigned. */
|
||
|
||
/* Portably test for unsigned overflow.
|
||
FIXME: This check is wrong; for example it doesn't find overflow
|
||
on 0x123456789 when LONGEST is 32 bits. */
|
||
if (c != 'l' && c != 'u' && n != 0)
|
||
{
|
||
if ((unsigned_p && (ULONGEST) prevn >= (ULONGEST) n))
|
||
error (_("Numeric constant too large."));
|
||
}
|
||
prevn = n;
|
||
}
|
||
|
||
/* An integer constant is an int, a long, or a long long. An L
|
||
suffix forces it to be long; an LL suffix forces it to be long
|
||
long. If not forced to a larger size, it gets the first type of
|
||
the above that it fits in. To figure out whether it fits, we
|
||
shift it right and see whether anything remains. Note that we
|
||
can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
|
||
operation, because many compilers will warn about such a shift
|
||
(which always produces a zero result). Sometimes gdbarch_int_bit
|
||
or gdbarch_long_bit will be that big, sometimes not. To deal with
|
||
the case where it is we just always shift the value more than
|
||
once, with fewer bits each time. */
|
||
|
||
un = (ULONGEST)n >> 2;
|
||
if (long_p == 0
|
||
&& (un >> (gdbarch_int_bit (parse_gdbarch) - 2)) == 0)
|
||
{
|
||
high_bit = ((ULONGEST)1) << (gdbarch_int_bit (parse_gdbarch) - 1);
|
||
|
||
/* A large decimal (not hex or octal) constant (between INT_MAX
|
||
and UINT_MAX) is a long or unsigned long, according to ANSI,
|
||
never an unsigned int, but this code treats it as unsigned
|
||
int. This probably should be fixed. GCC gives a warning on
|
||
such constants. */
|
||
|
||
unsigned_type = parse_type->builtin_unsigned_int;
|
||
signed_type = parse_type->builtin_int;
|
||
}
|
||
else if (long_p <= 1
|
||
&& (un >> (gdbarch_long_bit (parse_gdbarch) - 2)) == 0)
|
||
{
|
||
high_bit = ((ULONGEST)1) << (gdbarch_long_bit (parse_gdbarch) - 1);
|
||
unsigned_type = parse_type->builtin_unsigned_long;
|
||
signed_type = parse_type->builtin_long;
|
||
}
|
||
else
|
||
{
|
||
int shift;
|
||
if (sizeof (ULONGEST) * HOST_CHAR_BIT
|
||
< gdbarch_long_long_bit (parse_gdbarch))
|
||
/* A long long does not fit in a LONGEST. */
|
||
shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1);
|
||
else
|
||
shift = (gdbarch_long_long_bit (parse_gdbarch) - 1);
|
||
high_bit = (ULONGEST) 1 << shift;
|
||
unsigned_type = parse_type->builtin_unsigned_long_long;
|
||
signed_type = parse_type->builtin_long_long;
|
||
}
|
||
|
||
putithere->typed_val_int.val = n;
|
||
|
||
/* If the high bit of the worked out type is set then this number
|
||
has to be unsigned. */
|
||
|
||
if (unsigned_p || (n & high_bit))
|
||
{
|
||
putithere->typed_val_int.type = unsigned_type;
|
||
}
|
||
else
|
||
{
|
||
putithere->typed_val_int.type = signed_type;
|
||
}
|
||
|
||
return INT;
|
||
}
|
||
|
||
/* Temporary obstack used for holding strings. */
|
||
static struct obstack tempbuf;
|
||
static int tempbuf_init;
|
||
|
||
/* Parse a string or character literal from TOKPTR. The string or
|
||
character may be wide or unicode. *OUTPTR is set to just after the
|
||
end of the literal in the input string. The resulting token is
|
||
stored in VALUE. This returns a token value, either STRING or
|
||
CHAR, depending on what was parsed. *HOST_CHARS is set to the
|
||
number of host characters in the literal. */
|
||
|
||
static int
|
||
parse_string_or_char (char *tokptr, char **outptr, struct typed_stoken *value,
|
||
int *host_chars)
|
||
{
|
||
int quote;
|
||
|
||
/* Build the gdb internal form of the input string in tempbuf. Note
|
||
that the buffer is null byte terminated *only* for the
|
||
convenience of debugging gdb itself and printing the buffer
|
||
contents when the buffer contains no embedded nulls. Gdb does
|
||
not depend upon the buffer being null byte terminated, it uses
|
||
the length string instead. This allows gdb to handle C strings
|
||
(as well as strings in other languages) with embedded null
|
||
bytes */
|
||
|
||
if (!tempbuf_init)
|
||
tempbuf_init = 1;
|
||
else
|
||
obstack_free (&tempbuf, NULL);
|
||
obstack_init (&tempbuf);
|
||
|
||
/* Skip the quote. */
|
||
quote = *tokptr;
|
||
++tokptr;
|
||
|
||
*host_chars = 0;
|
||
|
||
while (*tokptr)
|
||
{
|
||
char c = *tokptr;
|
||
if (c == '\\')
|
||
{
|
||
++tokptr;
|
||
*host_chars += c_parse_escape (&tokptr, &tempbuf);
|
||
}
|
||
else if (c == quote)
|
||
break;
|
||
else
|
||
{
|
||
obstack_1grow (&tempbuf, c);
|
||
++tokptr;
|
||
/* FIXME: this does the wrong thing with multi-byte host
|
||
characters. We could use mbrlen here, but that would
|
||
make "set host-charset" a bit less useful. */
|
||
++*host_chars;
|
||
}
|
||
}
|
||
|
||
if (*tokptr != quote)
|
||
{
|
||
if (quote == '"')
|
||
error (_("Unterminated string in expression."));
|
||
else
|
||
error (_("Unmatched single quote."));
|
||
}
|
||
++tokptr;
|
||
|
||
value->type = C_STRING | (quote == '\'' ? C_CHAR : 0); /*FIXME*/
|
||
value->ptr = obstack_base (&tempbuf);
|
||
value->length = obstack_object_size (&tempbuf);
|
||
|
||
*outptr = tokptr;
|
||
|
||
return quote == '\'' ? CHAR : STRING;
|
||
}
|
||
|
||
struct token
|
||
{
|
||
char *operator;
|
||
int token;
|
||
enum exp_opcode opcode;
|
||
};
|
||
|
||
static const struct token tokentab3[] =
|
||
{
|
||
{">>=", ASSIGN_MODIFY, BINOP_RSH},
|
||
{"<<=", ASSIGN_MODIFY, BINOP_LSH},
|
||
/*{"&^=", ASSIGN_MODIFY, BINOP_BITWISE_ANDNOT}, TODO */
|
||
{"...", DOTDOTDOT, OP_NULL},
|
||
};
|
||
|
||
static const struct token tokentab2[] =
|
||
{
|
||
{"+=", ASSIGN_MODIFY, BINOP_ADD},
|
||
{"-=", ASSIGN_MODIFY, BINOP_SUB},
|
||
{"*=", ASSIGN_MODIFY, BINOP_MUL},
|
||
{"/=", ASSIGN_MODIFY, BINOP_DIV},
|
||
{"%=", ASSIGN_MODIFY, BINOP_REM},
|
||
{"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR},
|
||
{"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND},
|
||
{"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR},
|
||
{"++", INCREMENT, BINOP_END},
|
||
{"--", DECREMENT, BINOP_END},
|
||
/*{"->", RIGHT_ARROW, BINOP_END}, Doesn't exist in Go. */
|
||
{"<-", LEFT_ARROW, BINOP_END},
|
||
{"&&", ANDAND, BINOP_END},
|
||
{"||", OROR, BINOP_END},
|
||
{"<<", LSH, BINOP_END},
|
||
{">>", RSH, BINOP_END},
|
||
{"==", EQUAL, BINOP_END},
|
||
{"!=", NOTEQUAL, BINOP_END},
|
||
{"<=", LEQ, BINOP_END},
|
||
{">=", GEQ, BINOP_END},
|
||
/*{"&^", ANDNOT, BINOP_END}, TODO */
|
||
};
|
||
|
||
/* Identifier-like tokens. */
|
||
static const struct token ident_tokens[] =
|
||
{
|
||
{"true", TRUE_KEYWORD, OP_NULL},
|
||
{"false", FALSE_KEYWORD, OP_NULL},
|
||
{"nil", NIL_KEYWORD, OP_NULL},
|
||
{"const", CONST_KEYWORD, OP_NULL},
|
||
{"struct", STRUCT_KEYWORD, OP_NULL},
|
||
{"type", TYPE_KEYWORD, OP_NULL},
|
||
{"interface", INTERFACE_KEYWORD, OP_NULL},
|
||
{"chan", CHAN_KEYWORD, OP_NULL},
|
||
{"byte", BYTE_KEYWORD, OP_NULL}, /* An alias of uint8. */
|
||
{"len", LEN_KEYWORD, OP_NULL},
|
||
{"cap", CAP_KEYWORD, OP_NULL},
|
||
{"new", NEW_KEYWORD, OP_NULL},
|
||
{"iota", IOTA_KEYWORD, OP_NULL},
|
||
};
|
||
|
||
/* This is set if a NAME token appeared at the very end of the input
|
||
string, with no whitespace separating the name from the EOF. This
|
||
is used only when parsing to do field name completion. */
|
||
static int saw_name_at_eof;
|
||
|
||
/* This is set if the previously-returned token was a structure
|
||
operator -- either '.' or ARROW. This is used only when parsing to
|
||
do field name completion. */
|
||
static int last_was_structop;
|
||
|
||
/* Read one token, getting characters through lexptr. */
|
||
|
||
static int
|
||
lex_one_token (void)
|
||
{
|
||
int c;
|
||
int namelen;
|
||
unsigned int i;
|
||
char *tokstart;
|
||
int saw_structop = last_was_structop;
|
||
char *copy;
|
||
|
||
last_was_structop = 0;
|
||
|
||
retry:
|
||
|
||
prev_lexptr = lexptr;
|
||
|
||
tokstart = lexptr;
|
||
/* See if it is a special token of length 3. */
|
||
for (i = 0; i < sizeof (tokentab3) / sizeof (tokentab3[0]); i++)
|
||
if (strncmp (tokstart, tokentab3[i].operator, 3) == 0)
|
||
{
|
||
lexptr += 3;
|
||
yylval.opcode = tokentab3[i].opcode;
|
||
return tokentab3[i].token;
|
||
}
|
||
|
||
/* See if it is a special token of length 2. */
|
||
for (i = 0; i < sizeof (tokentab2) / sizeof (tokentab2[0]); i++)
|
||
if (strncmp (tokstart, tokentab2[i].operator, 2) == 0)
|
||
{
|
||
lexptr += 2;
|
||
yylval.opcode = tokentab2[i].opcode;
|
||
/* NOTE: -> doesn't exist in Go, so we don't need to watch for
|
||
setting last_was_structop here. */
|
||
return tokentab2[i].token;
|
||
}
|
||
|
||
switch (c = *tokstart)
|
||
{
|
||
case 0:
|
||
if (saw_name_at_eof)
|
||
{
|
||
saw_name_at_eof = 0;
|
||
return COMPLETE;
|
||
}
|
||
else if (saw_structop)
|
||
return COMPLETE;
|
||
else
|
||
return 0;
|
||
|
||
case ' ':
|
||
case '\t':
|
||
case '\n':
|
||
lexptr++;
|
||
goto retry;
|
||
|
||
case '[':
|
||
case '(':
|
||
paren_depth++;
|
||
lexptr++;
|
||
return c;
|
||
|
||
case ']':
|
||
case ')':
|
||
if (paren_depth == 0)
|
||
return 0;
|
||
paren_depth--;
|
||
lexptr++;
|
||
return c;
|
||
|
||
case ',':
|
||
if (comma_terminates
|
||
&& paren_depth == 0)
|
||
return 0;
|
||
lexptr++;
|
||
return c;
|
||
|
||
case '.':
|
||
/* Might be a floating point number. */
|
||
if (lexptr[1] < '0' || lexptr[1] > '9')
|
||
{
|
||
if (in_parse_field)
|
||
last_was_structop = 1;
|
||
goto symbol; /* Nope, must be a symbol. */
|
||
}
|
||
/* FALL THRU into number case. */
|
||
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
{
|
||
/* It's a number. */
|
||
int got_dot = 0, got_e = 0, toktype;
|
||
char *p = tokstart;
|
||
int hex = input_radix > 10;
|
||
|
||
if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
|
||
{
|
||
p += 2;
|
||
hex = 1;
|
||
}
|
||
|
||
for (;; ++p)
|
||
{
|
||
/* This test includes !hex because 'e' is a valid hex digit
|
||
and thus does not indicate a floating point number when
|
||
the radix is hex. */
|
||
if (!hex && !got_e && (*p == 'e' || *p == 'E'))
|
||
got_dot = got_e = 1;
|
||
/* This test does not include !hex, because a '.' always indicates
|
||
a decimal floating point number regardless of the radix. */
|
||
else if (!got_dot && *p == '.')
|
||
got_dot = 1;
|
||
else if (got_e && (p[-1] == 'e' || p[-1] == 'E')
|
||
&& (*p == '-' || *p == '+'))
|
||
/* This is the sign of the exponent, not the end of the
|
||
number. */
|
||
continue;
|
||
/* We will take any letters or digits. parse_number will
|
||
complain if past the radix, or if L or U are not final. */
|
||
else if ((*p < '0' || *p > '9')
|
||
&& ((*p < 'a' || *p > 'z')
|
||
&& (*p < 'A' || *p > 'Z')))
|
||
break;
|
||
}
|
||
toktype = parse_number (tokstart, p - tokstart, got_dot|got_e, &yylval);
|
||
if (toktype == ERROR)
|
||
{
|
||
char *err_copy = (char *) alloca (p - tokstart + 1);
|
||
|
||
memcpy (err_copy, tokstart, p - tokstart);
|
||
err_copy[p - tokstart] = 0;
|
||
error (_("Invalid number \"%s\"."), err_copy);
|
||
}
|
||
lexptr = p;
|
||
return toktype;
|
||
}
|
||
|
||
case '@':
|
||
{
|
||
char *p = &tokstart[1];
|
||
size_t len = strlen ("entry");
|
||
|
||
while (isspace (*p))
|
||
p++;
|
||
if (strncmp (p, "entry", len) == 0 && !isalnum (p[len])
|
||
&& p[len] != '_')
|
||
{
|
||
lexptr = &p[len];
|
||
return ENTRY;
|
||
}
|
||
}
|
||
/* FALLTHRU */
|
||
case '+':
|
||
case '-':
|
||
case '*':
|
||
case '/':
|
||
case '%':
|
||
case '|':
|
||
case '&':
|
||
case '^':
|
||
case '~':
|
||
case '!':
|
||
case '<':
|
||
case '>':
|
||
case '?':
|
||
case ':':
|
||
case '=':
|
||
case '{':
|
||
case '}':
|
||
symbol:
|
||
lexptr++;
|
||
return c;
|
||
|
||
case '\'':
|
||
case '"':
|
||
case '`':
|
||
{
|
||
int host_len;
|
||
int result = parse_string_or_char (tokstart, &lexptr, &yylval.tsval,
|
||
&host_len);
|
||
if (result == CHAR)
|
||
{
|
||
if (host_len == 0)
|
||
error (_("Empty character constant."));
|
||
else if (host_len > 2 && c == '\'')
|
||
{
|
||
++tokstart;
|
||
namelen = lexptr - tokstart - 1;
|
||
goto tryname;
|
||
}
|
||
else if (host_len > 1)
|
||
error (_("Invalid character constant."));
|
||
}
|
||
return result;
|
||
}
|
||
}
|
||
|
||
if (!(c == '_' || c == '$'
|
||
|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
|
||
/* We must have come across a bad character (e.g. ';'). */
|
||
error (_("Invalid character '%c' in expression."), c);
|
||
|
||
/* It's a name. See how long it is. */
|
||
namelen = 0;
|
||
for (c = tokstart[namelen];
|
||
(c == '_' || c == '$' || (c >= '0' && c <= '9')
|
||
|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));)
|
||
{
|
||
c = tokstart[++namelen];
|
||
}
|
||
|
||
/* The token "if" terminates the expression and is NOT removed from
|
||
the input stream. It doesn't count if it appears in the
|
||
expansion of a macro. */
|
||
if (namelen == 2
|
||
&& tokstart[0] == 'i'
|
||
&& tokstart[1] == 'f')
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
/* For the same reason (breakpoint conditions), "thread N"
|
||
terminates the expression. "thread" could be an identifier, but
|
||
an identifier is never followed by a number without intervening
|
||
punctuation.
|
||
Handle abbreviations of these, similarly to
|
||
breakpoint.c:find_condition_and_thread.
|
||
TODO: Watch for "goroutine" here? */
|
||
if (namelen >= 1
|
||
&& strncmp (tokstart, "thread", namelen) == 0
|
||
&& (tokstart[namelen] == ' ' || tokstart[namelen] == '\t'))
|
||
{
|
||
char *p = tokstart + namelen + 1;
|
||
while (*p == ' ' || *p == '\t')
|
||
p++;
|
||
if (*p >= '0' && *p <= '9')
|
||
return 0;
|
||
}
|
||
|
||
lexptr += namelen;
|
||
|
||
tryname:
|
||
|
||
yylval.sval.ptr = tokstart;
|
||
yylval.sval.length = namelen;
|
||
|
||
/* Catch specific keywords. */
|
||
copy = copy_name (yylval.sval);
|
||
for (i = 0; i < sizeof (ident_tokens) / sizeof (ident_tokens[0]); i++)
|
||
if (strcmp (copy, ident_tokens[i].operator) == 0)
|
||
{
|
||
/* It is ok to always set this, even though we don't always
|
||
strictly need to. */
|
||
yylval.opcode = ident_tokens[i].opcode;
|
||
return ident_tokens[i].token;
|
||
}
|
||
|
||
if (*tokstart == '$')
|
||
return DOLLAR_VARIABLE;
|
||
|
||
if (in_parse_field && *lexptr == '\0')
|
||
saw_name_at_eof = 1;
|
||
return NAME;
|
||
}
|
||
|
||
/* An object of this type is pushed on a FIFO by the "outer" lexer. */
|
||
typedef struct
|
||
{
|
||
int token;
|
||
YYSTYPE value;
|
||
} token_and_value;
|
||
|
||
DEF_VEC_O (token_and_value);
|
||
|
||
/* A FIFO of tokens that have been read but not yet returned to the
|
||
parser. */
|
||
static VEC (token_and_value) *token_fifo;
|
||
|
||
/* Non-zero if the lexer should return tokens from the FIFO. */
|
||
static int popping;
|
||
|
||
/* Temporary storage for yylex; this holds symbol names as they are
|
||
built up. */
|
||
static struct obstack name_obstack;
|
||
|
||
/* Build "package.name" in name_obstack.
|
||
For convenience of the caller, the name is NUL-terminated,
|
||
but the NUL is not included in the recorded length. */
|
||
|
||
static struct stoken
|
||
build_packaged_name (const char *package, int package_len,
|
||
const char *name, int name_len)
|
||
{
|
||
struct stoken result;
|
||
|
||
obstack_free (&name_obstack, obstack_base (&name_obstack));
|
||
obstack_grow (&name_obstack, package, package_len);
|
||
obstack_grow_str (&name_obstack, ".");
|
||
obstack_grow (&name_obstack, name, name_len);
|
||
obstack_grow (&name_obstack, "", 1);
|
||
result.ptr = obstack_base (&name_obstack);
|
||
result.length = obstack_object_size (&name_obstack) - 1;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Return non-zero if NAME is a package name.
|
||
BLOCK is the scope in which to interpret NAME; this can be NULL
|
||
to mean the global scope. */
|
||
|
||
static int
|
||
package_name_p (const char *name, struct block *block)
|
||
{
|
||
struct symbol *sym;
|
||
int is_a_field_of_this;
|
||
|
||
sym = lookup_symbol (name, block, STRUCT_DOMAIN, &is_a_field_of_this);
|
||
|
||
if (sym
|
||
&& SYMBOL_CLASS (sym) == LOC_TYPEDEF
|
||
&& TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_MODULE)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Classify a (potential) function in the "unsafe" package.
|
||
We fold these into "keywords" to keep things simple, at least until
|
||
something more complex is warranted. */
|
||
|
||
static int
|
||
classify_unsafe_function (struct stoken function_name)
|
||
{
|
||
char *copy = copy_name (function_name);
|
||
|
||
if (strcmp (copy, "Sizeof") == 0)
|
||
{
|
||
yylval.sval = function_name;
|
||
return SIZEOF_KEYWORD;
|
||
}
|
||
|
||
error (_("Unknown function in `unsafe' package: %s"), copy);
|
||
}
|
||
|
||
/* Classify token(s) "name1.name2" where name1 is known to be a package.
|
||
The contents of the token are in `yylval'.
|
||
Updates yylval and returns the new token type.
|
||
|
||
The result is one of NAME, NAME_OR_INT, or TYPENAME. */
|
||
|
||
static int
|
||
classify_packaged_name (struct block *block)
|
||
{
|
||
char *copy;
|
||
struct symbol *sym;
|
||
int is_a_field_of_this = 0;
|
||
|
||
copy = copy_name (yylval.sval);
|
||
|
||
sym = lookup_symbol (copy, block, VAR_DOMAIN, &is_a_field_of_this);
|
||
|
||
if (sym)
|
||
{
|
||
yylval.ssym.sym = sym;
|
||
yylval.ssym.is_a_field_of_this = is_a_field_of_this;
|
||
}
|
||
|
||
return NAME;
|
||
}
|
||
|
||
/* Classify a NAME token.
|
||
The contents of the token are in `yylval'.
|
||
Updates yylval and returns the new token type.
|
||
BLOCK is the block in which lookups start; this can be NULL
|
||
to mean the global scope.
|
||
|
||
The result is one of NAME, NAME_OR_INT, or TYPENAME. */
|
||
|
||
static int
|
||
classify_name (struct block *block)
|
||
{
|
||
struct type *type;
|
||
struct symbol *sym;
|
||
char *copy;
|
||
int is_a_field_of_this = 0;
|
||
|
||
copy = copy_name (yylval.sval);
|
||
|
||
/* Try primitive types first so they win over bad/weird debug info. */
|
||
type = language_lookup_primitive_type_by_name (parse_language,
|
||
parse_gdbarch, copy);
|
||
if (type != NULL)
|
||
{
|
||
/* NOTE: We take advantage of the fact that yylval coming in was a
|
||
NAME, and that struct ttype is a compatible extension of struct
|
||
stoken, so yylval.tsym.stoken is already filled in. */
|
||
yylval.tsym.type = type;
|
||
return TYPENAME;
|
||
}
|
||
|
||
/* TODO: What about other types? */
|
||
|
||
sym = lookup_symbol (copy, block, VAR_DOMAIN, &is_a_field_of_this);
|
||
|
||
if (sym)
|
||
{
|
||
yylval.ssym.sym = sym;
|
||
yylval.ssym.is_a_field_of_this = is_a_field_of_this;
|
||
return NAME;
|
||
}
|
||
|
||
/* If we didn't find a symbol, look again in the current package.
|
||
This is to, e.g., make "p global_var" work without having to specify
|
||
the package name. We intentionally only looks for objects in the
|
||
current package. */
|
||
|
||
{
|
||
char *current_package_name = go_block_package_name (block);
|
||
|
||
if (current_package_name != NULL)
|
||
{
|
||
struct stoken sval =
|
||
build_packaged_name (current_package_name,
|
||
strlen (current_package_name),
|
||
copy, strlen (copy));
|
||
|
||
xfree (current_package_name);
|
||
sym = lookup_symbol (sval.ptr, block, VAR_DOMAIN,
|
||
&is_a_field_of_this);
|
||
if (sym)
|
||
{
|
||
yylval.ssym.stoken = sval;
|
||
yylval.ssym.sym = sym;
|
||
yylval.ssym.is_a_field_of_this = is_a_field_of_this;
|
||
return NAME;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Input names that aren't symbols but ARE valid hex numbers, when
|
||
the input radix permits them, can be names or numbers depending
|
||
on the parse. Note we support radixes > 16 here. */
|
||
if ((copy[0] >= 'a' && copy[0] < 'a' + input_radix - 10)
|
||
|| (copy[0] >= 'A' && copy[0] < 'A' + input_radix - 10))
|
||
{
|
||
YYSTYPE newlval; /* Its value is ignored. */
|
||
int hextype = parse_number (copy, yylval.sval.length, 0, &newlval);
|
||
if (hextype == INT)
|
||
{
|
||
yylval.ssym.sym = NULL;
|
||
yylval.ssym.is_a_field_of_this = 0;
|
||
return NAME_OR_INT;
|
||
}
|
||
}
|
||
|
||
yylval.ssym.sym = NULL;
|
||
yylval.ssym.is_a_field_of_this = 0;
|
||
return NAME;
|
||
}
|
||
|
||
/* This is taken from c-exp.y mostly to get something working.
|
||
The basic structure has been kept because we may yet need some of it. */
|
||
|
||
static int
|
||
yylex (void)
|
||
{
|
||
token_and_value current, next;
|
||
|
||
if (popping && !VEC_empty (token_and_value, token_fifo))
|
||
{
|
||
token_and_value tv = *VEC_index (token_and_value, token_fifo, 0);
|
||
VEC_ordered_remove (token_and_value, token_fifo, 0);
|
||
yylval = tv.value;
|
||
/* There's no need to fall through to handle package.name
|
||
as that can never happen here. In theory. */
|
||
return tv.token;
|
||
}
|
||
popping = 0;
|
||
|
||
current.token = lex_one_token ();
|
||
|
||
/* TODO: Need a way to force specifying name1 as a package.
|
||
.name1.name2 ? */
|
||
|
||
if (current.token != NAME)
|
||
return current.token;
|
||
|
||
/* See if we have "name1 . name2". */
|
||
|
||
current.value = yylval;
|
||
next.token = lex_one_token ();
|
||
next.value = yylval;
|
||
|
||
if (next.token == '.')
|
||
{
|
||
token_and_value name2;
|
||
|
||
name2.token = lex_one_token ();
|
||
name2.value = yylval;
|
||
|
||
if (name2.token == NAME)
|
||
{
|
||
/* Ok, we have "name1 . name2". */
|
||
char *copy;
|
||
|
||
copy = copy_name (current.value.sval);
|
||
|
||
if (strcmp (copy, "unsafe") == 0)
|
||
{
|
||
popping = 1;
|
||
return classify_unsafe_function (name2.value.sval);
|
||
}
|
||
|
||
if (package_name_p (copy, expression_context_block))
|
||
{
|
||
popping = 1;
|
||
yylval.sval = build_packaged_name (current.value.sval.ptr,
|
||
current.value.sval.length,
|
||
name2.value.sval.ptr,
|
||
name2.value.sval.length);
|
||
return classify_packaged_name (expression_context_block);
|
||
}
|
||
}
|
||
|
||
VEC_safe_push (token_and_value, token_fifo, &next);
|
||
VEC_safe_push (token_and_value, token_fifo, &name2);
|
||
}
|
||
else
|
||
{
|
||
VEC_safe_push (token_and_value, token_fifo, &next);
|
||
}
|
||
|
||
/* If we arrive here we don't have a package-qualified name. */
|
||
|
||
popping = 1;
|
||
yylval = current.value;
|
||
return classify_name (expression_context_block);
|
||
}
|
||
|
||
int
|
||
go_parse (void)
|
||
{
|
||
int result;
|
||
struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
|
||
|
||
make_cleanup_restore_integer (&yydebug);
|
||
yydebug = parser_debug;
|
||
|
||
/* Initialize some state used by the lexer. */
|
||
last_was_structop = 0;
|
||
saw_name_at_eof = 0;
|
||
|
||
VEC_free (token_and_value, token_fifo);
|
||
popping = 0;
|
||
obstack_init (&name_obstack);
|
||
make_cleanup_obstack_free (&name_obstack);
|
||
|
||
result = yyparse ();
|
||
do_cleanups (back_to);
|
||
return result;
|
||
}
|
||
|
||
void
|
||
yyerror (char *msg)
|
||
{
|
||
if (prev_lexptr)
|
||
lexptr = prev_lexptr;
|
||
|
||
error (_("A %s in expression, near `%s'."), (msg ? msg : "error"), lexptr);
|
||
}
|