/* Parse expressions for GDB.
Copyright (C) 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2004, 2005, 2007, 2008
+ 1998, 1999, 2000, 2001, 2004, 2005, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Modified from expread.y by the Department of Computer Science at the
during the process of parsing; the lower levels of the tree always
come first in the result. */
-#include <ctype.h>
-
#include "defs.h"
+#include <ctype.h>
+#include "arch-utils.h"
#include "gdb_string.h"
#include "symtab.h"
#include "gdbtypes.h"
{
print_subexp_standard,
operator_length_standard,
+ operator_check_standard,
op_name_standard,
dump_subexp_body_standard,
evaluate_subexp_standard
fprintf_filtered (file, _("Expression debugging is %s.\n"), value);
}
+
+/* Non-zero if an expression parser should set yydebug. */
+int parser_debug;
+
+static void
+show_parserdebug (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("Parser debugging is %s.\n"), value);
+}
+
+
static void free_funcalls (void *ignore);
static int prefixify_expression (struct expression *);
{
int val = arglist_len;
struct funcall *call = funcall_chain;
+
funcall_chain = call->next;
arglist_len = call->arglist_len;
xfree (call);
write_exp_elt_opcode (enum exp_opcode expelt)
{
union exp_element tmp;
- memset (&tmp, 0, sizeof (union exp_element));
+ memset (&tmp, 0, sizeof (union exp_element));
tmp.opcode = expelt;
-
write_exp_elt (tmp);
}
write_exp_elt_sym (struct symbol *expelt)
{
union exp_element tmp;
- memset (&tmp, 0, sizeof (union exp_element));
+ memset (&tmp, 0, sizeof (union exp_element));
tmp.symbol = expelt;
-
write_exp_elt (tmp);
}
write_exp_elt_block (struct block *b)
{
union exp_element tmp;
+
memset (&tmp, 0, sizeof (union exp_element));
tmp.block = b;
write_exp_elt (tmp);
write_exp_elt_objfile (struct objfile *objfile)
{
union exp_element tmp;
+
memset (&tmp, 0, sizeof (union exp_element));
tmp.objfile = objfile;
write_exp_elt (tmp);
write_exp_elt_longcst (LONGEST expelt)
{
union exp_element tmp;
- memset (&tmp, 0, sizeof (union exp_element));
+ memset (&tmp, 0, sizeof (union exp_element));
tmp.longconst = expelt;
-
write_exp_elt (tmp);
}
write_exp_elt_dblcst (DOUBLEST expelt)
{
union exp_element tmp;
- memset (&tmp, 0, sizeof (union exp_element));
+ memset (&tmp, 0, sizeof (union exp_element));
tmp.doubleconst = expelt;
-
write_exp_elt (tmp);
}
write_exp_elt_type (struct type *expelt)
{
union exp_element tmp;
- memset (&tmp, 0, sizeof (union exp_element));
+ memset (&tmp, 0, sizeof (union exp_element));
tmp.type = expelt;
-
write_exp_elt (tmp);
}
write_exp_elt_intern (struct internalvar *expelt)
{
union exp_element tmp;
- memset (&tmp, 0, sizeof (union exp_element));
+ memset (&tmp, 0, sizeof (union exp_element));
tmp.internalvar = expelt;
-
write_exp_elt (tmp);
}
strings with embedded null bytes, as is required for some languages.
Don't be fooled by the fact that the string is null byte terminated,
- this is strictly for the convenience of debugging gdb itself. Gdb
+ this is strictly for the convenience of debugging gdb itself.
Gdb does not depend up the string being null terminated, since the
actual length is recorded in expression elements at each end of the
string. The null byte is taken into consideration when computing how
write_exp_elt_longcst ((LONGEST) len);
}
+/* Add a vector of string constants to the end of the expression.
+
+ This adds an OP_STRING operation, but encodes the contents
+ differently from write_exp_string. The language is expected to
+ handle evaluation of this expression itself.
+
+ After the usual OP_STRING header, TYPE is written into the
+ expression as a long constant. The interpretation of this field is
+ up to the language evaluator.
+
+ Next, each string in VEC is written. The length is written as a
+ long constant, followed by the contents of the string. */
+
+void
+write_exp_string_vector (int type, struct stoken_vector *vec)
+{
+ int i, n_slots, len;
+
+ /* Compute the size. We compute the size in number of slots to
+ avoid issues with string padding. */
+ n_slots = 0;
+ for (i = 0; i < vec->len; ++i)
+ {
+ /* One slot for the length of this element, plus the number of
+ slots needed for this string. */
+ n_slots += 1 + BYTES_TO_EXP_ELEM (vec->tokens[i].length);
+ }
+
+ /* One more slot for the type of the string. */
+ ++n_slots;
+
+ /* Now compute a phony string length. */
+ len = EXP_ELEM_TO_BYTES (n_slots) - 1;
+
+ n_slots += 4;
+ if ((expout_ptr + n_slots) >= expout_size)
+ {
+ expout_size = max (expout_size * 2, expout_ptr + n_slots + 10);
+ expout = (struct expression *)
+ xrealloc ((char *) expout, (sizeof (struct expression)
+ + EXP_ELEM_TO_BYTES (expout_size)));
+ }
+
+ write_exp_elt_opcode (OP_STRING);
+ write_exp_elt_longcst (len);
+ write_exp_elt_longcst (type);
+
+ for (i = 0; i < vec->len; ++i)
+ {
+ write_exp_elt_longcst (vec->tokens[i].length);
+ memcpy (&expout->elts[expout_ptr], vec->tokens[i].ptr,
+ vec->tokens[i].length);
+ expout_ptr += BYTES_TO_EXP_ELEM (vec->tokens[i].length);
+ }
+
+ write_exp_elt_longcst (len);
+ write_exp_elt_opcode (OP_STRING);
+}
+
/* Add a bitstring constant to the end of the expression.
Bitstring constants are stored by first writing an expression element
}
/* Add the appropriate elements for a minimal symbol to the end of
- the expression. The rationale behind passing in text_symbol_type and
- data_symbol_type was so that Modula-2 could pass in WORD for
- data_symbol_type. Perhaps it still is useful to have those types vary
- based on the language, but they no longer have names like "int", so
- the initial rationale is gone. */
+ the expression. */
void
-write_exp_msymbol (struct minimal_symbol *msymbol,
- struct type *text_symbol_type,
- struct type *data_symbol_type)
+write_exp_msymbol (struct minimal_symbol *msymbol)
{
struct objfile *objfile = msymbol_objfile (msymbol);
struct gdbarch *gdbarch = get_objfile_arch (objfile);
CORE_ADDR addr = SYMBOL_VALUE_ADDRESS (msymbol);
struct obj_section *section = SYMBOL_OBJ_SECTION (msymbol);
- enum minimal_symbol_type type = msymbol->type;
+ enum minimal_symbol_type type = MSYMBOL_TYPE (msymbol);
CORE_ADDR pc;
/* The minimal symbol might point to a function descriptor;
write_exp_elt_opcode (OP_LONG);
/* Let's make the type big enough to hold a 64-bit address. */
- write_exp_elt_type (builtin_type_CORE_ADDR);
+ write_exp_elt_type (objfile_type (objfile)->builtin_core_addr);
write_exp_elt_longcst ((LONGEST) addr);
write_exp_elt_opcode (OP_LONG);
{
write_exp_elt_opcode (UNOP_MEMVAL_TLS);
write_exp_elt_objfile (objfile);
- write_exp_elt_type (builtin_type (gdbarch)->nodebug_tls_symbol);
+ write_exp_elt_type (objfile_type (objfile)->nodebug_tls_symbol);
write_exp_elt_opcode (UNOP_MEMVAL_TLS);
return;
}
case mst_text:
case mst_file_text:
case mst_solib_trampoline:
- write_exp_elt_type (builtin_type (gdbarch)->nodebug_text_symbol);
+ write_exp_elt_type (objfile_type (objfile)->nodebug_text_symbol);
break;
case mst_data:
case mst_file_data:
case mst_bss:
case mst_file_bss:
- write_exp_elt_type (builtin_type (gdbarch)->nodebug_data_symbol);
+ write_exp_elt_type (objfile_type (objfile)->nodebug_data_symbol);
break;
default:
- write_exp_elt_type (builtin_type (gdbarch)->nodebug_unknown_symbol);
+ write_exp_elt_type (objfile_type (objfile)->nodebug_unknown_symbol);
break;
}
write_exp_elt_opcode (UNOP_MEMVAL);
/* Handle tokens that refer to machine registers:
$ followed by a register name. */
- i = user_reg_map_name_to_regnum (current_gdbarch,
+ i = user_reg_map_name_to_regnum (parse_gdbarch,
str.ptr + 1, str.length - 1);
if (i >= 0)
goto handle_register;
msym = lookup_minimal_symbol (copy_name (str), NULL, NULL);
if (msym)
{
- write_exp_msymbol (msym,
- lookup_function_type (builtin_type_int),
- builtin_type_int);
+ write_exp_msymbol (msym);
return;
}
int
length_of_subexp (struct expression *expr, int endpos)
{
- int oplen, args, i;
+ int oplen, args;
operator_length (expr, endpos, &oplen, &args);
break;
case OP_COMPLEX:
- oplen = 1;
+ oplen = 3;
args = 2;
break;
args = 1 + longest_to_int (expr->elts[endpos - 2].longconst);
break;
+ case TYPE_INSTANCE:
+ oplen = 4 + longest_to_int (expr->elts[endpos - 2].longconst);
+ args = 1;
+ break;
+
case OP_OBJC_MSGCALL: /* Objective C message (method) call */
oplen = 4;
args = 1 + longest_to_int (expr->elts[endpos - 2].longconst);
case BINOP_VAL:
case UNOP_CAST:
+ case UNOP_DYNAMIC_CAST:
+ case UNOP_REINTERPRET_CAST:
case UNOP_MEMVAL:
oplen = 3;
args = 1;
args = 1;
break;
+ case OP_ADL_FUNC:
+ oplen = longest_to_int (expr->elts[endpos - 2].longconst);
+ oplen = 4 + BYTES_TO_EXP_ELEM (oplen + 1);
+ oplen++;
+ oplen++;
+ break;
+
case OP_LABELED:
case STRUCTOP_STRUCT:
case STRUCTOP_PTR:
int args;
int i;
int *arglens;
- enum exp_opcode opcode;
int result = -1;
operator_length (inexpr, inend, &oplen, &args);
for (i = 0; i < args; i++)
{
int r;
+
oplen = arglens[i];
inend += oplen;
r = prefixify_subexp (inexpr, outexpr, inend, outbeg);
expout = (struct expression *)
xmalloc (sizeof (struct expression) + EXP_ELEM_TO_BYTES (expout_size));
expout->language_defn = current_language;
+ expout->gdbarch = get_current_arch ();
TRY_CATCH (except, RETURN_MASK_ALL)
{
parse_expression (char *string)
{
struct expression *exp;
+
exp = parse_exp_1 (&string, 0, 0);
if (*string)
error (_("Junk after end of expression."));
/* Parse STRING as an expression. If parsing ends in the middle of a
field reference, return the type of the left-hand-side of the
reference; furthermore, if the parsing ends in the field name,
- return the field name in *NAME. In all other cases, return NULL. */
+ return the field name in *NAME. In all other cases, return NULL.
+ Returned non-NULL *NAME must be freed by the caller. */
struct type *
parse_field_expression (char *string, char **name)
xfree (exp);
return NULL;
}
+ /* (*NAME) is a part of the EXP memory block freed below. */
+ *name = xstrdup (*name);
+
val = evaluate_subexpression_type (exp, subexp);
xfree (exp);
void
push_type_address_space (char *string)
{
- push_type_int (address_space_name_to_int (string));
+ push_type_int (address_space_name_to_int (parse_gdbarch, string));
}
enum type_pieces
int make_volatile = 0;
int make_addr_space = 0;
int array_size;
- struct type *range_type;
while (!done)
switch (pop_type ())
array_size = pop_type_int ();
/* FIXME-type-allocation: need a way to free this type when we are
done with it. */
- range_type =
- create_range_type ((struct type *) NULL,
- builtin_type_int, 0,
- array_size >= 0 ? array_size - 1 : 0);
follow_type =
- create_array_type ((struct type *) NULL,
- follow_type, range_type);
+ lookup_array_range_type (follow_type,
+ 0, array_size >= 0 ? array_size - 1 : 0);
if (array_size < 0)
- TYPE_ARRAY_UPPER_BOUND_TYPE (follow_type)
- = BOUND_CANNOT_BE_DETERMINED;
+ TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (follow_type) = 1;
break;
case tp_function:
/* FIXME-type-allocation: need a way to free this type when we are
parser_fprintf (FILE *x, const char *y, ...)
{
va_list args;
+
va_start (args, y);
if (x == stderr)
vfprintf_unfiltered (gdb_stderr, y, args);
va_end (args);
}
+/* Implementation of the exp_descriptor method operator_check. */
+
+int
+operator_check_standard (struct expression *exp, int pos,
+ int (*objfile_func) (struct objfile *objfile,
+ void *data),
+ void *data)
+{
+ const union exp_element *const elts = exp->elts;
+ struct type *type = NULL;
+ struct objfile *objfile = NULL;
+
+ /* Extended operators should have been already handled by exp_descriptor
+ iterate method of its specific language. */
+ gdb_assert (elts[pos].opcode < OP_EXTENDED0);
+
+ /* Track the callers of write_exp_elt_type for this table. */
+
+ switch (elts[pos].opcode)
+ {
+ case BINOP_VAL:
+ case OP_COMPLEX:
+ case OP_DECFLOAT:
+ case OP_DOUBLE:
+ case OP_LONG:
+ case OP_SCOPE:
+ case OP_TYPE:
+ case UNOP_CAST:
+ case UNOP_DYNAMIC_CAST:
+ case UNOP_REINTERPRET_CAST:
+ case UNOP_MAX:
+ case UNOP_MEMVAL:
+ case UNOP_MIN:
+ type = elts[pos + 1].type;
+ break;
+
+ case TYPE_INSTANCE:
+ {
+ LONGEST arg, nargs = elts[pos + 1].longconst;
+
+ for (arg = 0; arg < nargs; arg++)
+ {
+ struct type *type = elts[pos + 2 + arg].type;
+ struct objfile *objfile = TYPE_OBJFILE (type);
+
+ if (objfile && (*objfile_func) (objfile, data))
+ return 1;
+ }
+ }
+ break;
+
+ case UNOP_MEMVAL_TLS:
+ objfile = elts[pos + 1].objfile;
+ type = elts[pos + 2].type;
+ break;
+
+ case OP_VAR_VALUE:
+ {
+ const struct block *const block = elts[pos + 1].block;
+ const struct symbol *const symbol = elts[pos + 2].symbol;
+
+ /* Check objfile where the variable itself is placed.
+ SYMBOL_OBJ_SECTION (symbol) may be NULL. */
+ if ((*objfile_func) (SYMBOL_SYMTAB (symbol)->objfile, data))
+ return 1;
+
+ /* Check objfile where is placed the code touching the variable. */
+ objfile = lookup_objfile_from_block (block);
+
+ type = SYMBOL_TYPE (symbol);
+ }
+ break;
+ }
+
+ /* Invoke callbacks for TYPE and OBJFILE if they were set as non-NULL. */
+
+ if (type && TYPE_OBJFILE (type)
+ && (*objfile_func) (TYPE_OBJFILE (type), data))
+ return 1;
+ if (objfile && (*objfile_func) (objfile, data))
+ return 1;
+
+ return 0;
+}
+
+/* Call OBJFILE_FUNC for any TYPE and OBJFILE found being referenced by EXP.
+ The functions are never called with NULL OBJFILE. Functions get passed an
+ arbitrary caller supplied DATA pointer. If any of the functions returns
+ non-zero value then (any other) non-zero value is immediately returned to
+ the caller. Otherwise zero is returned after iterating through whole EXP.
+ */
+
+static int
+exp_iterate (struct expression *exp,
+ int (*objfile_func) (struct objfile *objfile, void *data),
+ void *data)
+{
+ int endpos;
+
+ for (endpos = exp->nelts; endpos > 0; )
+ {
+ int pos, args, oplen = 0;
+
+ exp->language_defn->la_exp_desc->operator_length (exp, endpos,
+ &oplen, &args);
+ gdb_assert (oplen > 0);
+
+ pos = endpos - oplen;
+ if (exp->language_defn->la_exp_desc->operator_check (exp, pos,
+ objfile_func, data))
+ return 1;
+
+ endpos = pos;
+ }
+
+ return 0;
+}
+
+/* Helper for exp_uses_objfile. */
+
+static int
+exp_uses_objfile_iter (struct objfile *exp_objfile, void *objfile_voidp)
+{
+ struct objfile *objfile = objfile_voidp;
+
+ if (exp_objfile->separate_debug_objfile_backlink)
+ exp_objfile = exp_objfile->separate_debug_objfile_backlink;
+
+ return exp_objfile == objfile;
+}
+
+/* Return 1 if EXP uses OBJFILE (and will become dangling when OBJFILE
+ is unloaded), otherwise return 0. OBJFILE must not be a separate debug info
+ file. */
+
+int
+exp_uses_objfile (struct expression *exp, struct objfile *objfile)
+{
+ gdb_assert (objfile->separate_debug_objfile_backlink == NULL);
+
+ return exp_iterate (exp, exp_uses_objfile_iter, objfile);
+}
+
void
_initialize_parse (void)
{
NULL,
show_expressiondebug,
&setdebuglist, &showdebuglist);
+ add_setshow_boolean_cmd ("parser", class_maintenance,
+ &parser_debug, _("\
+Set parser debugging."), _("\
+Show parser debugging."), _("\
+When non-zero, expression parser tracing will be enabled."),
+ NULL,
+ show_parserdebug,
+ &setdebuglist, &showdebuglist);
}
projects / deliverable / binutils-gdb.git / blobdiff