/* 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, 2011
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);
/* Add one element to the end of the expression. */
/* To avoid a bug in the Sun 4 compiler, we pass things that can fit into
- a register through here */
+ a register through here. */
void
write_exp_elt (union exp_element expelt)
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);
}
that contains the length of the string, then stuffing the string
constant itself into however many expression elements are needed
to hold it, and then writing another expression element that contains
- the length of the string. I.E. an expression element at each end of
+ the length of the string. I.e. an expression element at each end of
the string records the string length, so you can skip over the
expression elements containing the actual string bytes from either
end of the string. Note that this also allows gdb to handle
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
many expression elements are required to hold the string constant, of
- course. */
+ course. */
void
/* Compute the number of expression elements required to hold the string
(including a null byte terminator), along with one expression element
at each end to record the actual string length (not including the
- null byte terminator). */
+ null byte terminator). */
lenelt = 2 + BYTES_TO_EXP_ELEM (len + 1);
/* Ensure that we have enough available expression elements to store
- everything. */
+ everything. */
if ((expout_ptr + lenelt) >= expout_size)
{
/* Write the leading length expression element (which advances the current
expression element index), then write the string constant followed by a
terminating null byte, and then write the trailing length expression
- element. */
+ element. */
write_exp_elt_longcst ((LONGEST) len);
strdata = (char *) &expout->elts[expout_ptr];
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
that contains the length of the bitstring (in bits), then stuffing the
bitstring constant itself into however many expression elements are
needed to hold it, and then writing another expression element that
- contains the length of the bitstring. I.E. an expression element at
+ contains the length of the bitstring. I.e. an expression element at
each end of the bitstring records the bitstring length, so you can skip
over the expression elements containing the actual bitstring bytes from
- either end of the bitstring. */
+ either end of the bitstring. */
void
write_exp_bitstring (struct stoken str)
/* Compute the number of expression elements required to hold the bitstring,
along with one expression element at each end to record the actual
- bitstring length in bits. */
+ bitstring length in bits. */
lenelt = 2 + BYTES_TO_EXP_ELEM (len);
/* Ensure that we have enough available expression elements to store
- everything. */
+ everything. */
if ((expout_ptr + lenelt) >= expout_size)
{
/* Write the leading length expression element (which advances the current
expression element index), then write the bitstring constant, and then
- write the trailing length expression element. */
+ write the trailing length expression element. */
write_exp_elt_longcst ((LONGEST) bits);
strdata = (char *) &expout->elts[expout_ptr];
}
/* 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);
- asection *bfd_section = SYMBOL_BFD_SECTION (msymbol);
- enum minimal_symbol_type type = msymbol->type;
+ struct obj_section *section = SYMBOL_OBJ_SECTION (msymbol);
+ enum minimal_symbol_type type = MSYMBOL_TYPE (msymbol);
CORE_ADDR pc;
/* The minimal symbol might point to a function descriptor;
/* In this case, assume we have a code symbol instead of
a data symbol. */
type = mst_text;
- bfd_section = NULL;
+ section = NULL;
addr = pc;
}
if (overlay_debugging)
- addr = symbol_overlayed_address (addr, bfd_section);
+ addr = symbol_overlayed_address (addr, section);
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);
- if (bfd_section && bfd_section->flags & SEC_THREAD_LOCAL)
+ if (section && section->the_bfd_section->flags & SEC_THREAD_LOCAL)
{
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);
from the first value which has index 1.
$$digits Value history with index <digits> relative
- to the last value. I.E. $$0 is the last
+ to the last value. I.e. $$0 is the last
value, $$1 is the one previous to that, $$2
is the one previous to $$1, etc.
$ | $0 | $$0 The last value in the value history.
$$ An abbreviation for the second to the last
- value in the value history, I.E. $$1
-
- */
+ value in the value history, I.e. $$1 */
void
write_dollar_variable (struct stoken str)
struct internalvar *isym = NULL;
/* Handle the tokens $digits; also $ (short for $0) and $$ (short for $$1)
- and $$digits (equivalent to $<-digits> if you could type that). */
+ and $$digits (equivalent to $<-digits> if you could type that). */
int negate = 0;
int i = 1;
}
if (i == str.length)
{
- /* Just dollars (one or two) */
+ /* Just dollars (one or two). */
i = -negate;
goto handle_last;
}
/* 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;
}
/* On some systems, such as HP-UX and hppa-linux, certain system routines
- have names beginning with $ or $$. Check for those, first. */
+ have names beginning with $ or $$. Check for those, first. */
sym = lookup_symbol (copy_name (str), (struct block *) NULL,
VAR_DOMAIN, (int *) NULL);
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;
}
case '\"':
case '{':
case '}':
- /* In future, may want to allow these?? */
+ /* In future, may want to allow these?? */
return 0;
case '<':
depth++; /* start nested template */
int
length_of_subexp (struct expression *expr, int endpos)
{
- int oplen, args, i;
+ int oplen, args;
operator_length (expr, endpos, &oplen, &args);
operator takes. */
void
-operator_length (struct expression *expr, int endpos, int *oplenp, int *argsp)
+operator_length (const struct expression *expr, int endpos, int *oplenp,
+ int *argsp)
{
expr->language_defn->la_exp_desc->operator_length (expr, endpos,
oplenp, argsp);
/* Default value for operator_length in exp_descriptor vectors. */
void
-operator_length_standard (struct expression *expr, int endpos,
+operator_length_standard (const struct expression *expr, int endpos,
int *oplenp, int *argsp)
{
int oplen = 1;
break;
case OP_COMPLEX:
- oplen = 1;
+ oplen = 3;
args = 2;
break;
args = 1 + longest_to_int (expr->elts[endpos - 2].longconst);
break;
- case OP_OBJC_MSGCALL: /* Objective C message (method) call */
+ 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);
break;
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:
case OP_REGISTER:
case OP_M2_STRING:
case OP_STRING:
- case OP_OBJC_NSSTRING: /* Objective C Foundation Class NSString constant */
- case OP_OBJC_SELECTOR: /* Objective C "@selector" pseudo-op */
+ case OP_OBJC_NSSTRING: /* Objective C Foundation Class
+ NSString constant. */
+ case OP_OBJC_SELECTOR: /* Objective C "@selector" pseudo-op. */
case OP_NAME:
oplen = longest_to_int (expr->elts[endpos - 2].longconst);
oplen = 4 + BYTES_TO_EXP_ELEM (oplen + 1);
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);
return result;
}
\f
-/* This page contains the two entry points to this file. */
-
/* Read an expression from the string *STRINGPTR points to,
parse it, and return a pointer to a struct expression that we malloc.
Use block BLOCK as the lexical context for variable names;
{
volatile struct gdb_exception except;
struct cleanup *old_chain;
+ const struct language_defn *lang = NULL;
int subexp;
lexptr = *stringptr;
expression_context_pc = BLOCK_START (expression_context_block);
}
+ if (language_mode == language_mode_auto && block != NULL)
+ {
+ /* Find the language associated to the given context block.
+ Default to the current language if it can not be determined.
+
+ Note that using the language corresponding to the current frame
+ can sometimes give unexpected results. For instance, this
+ routine is often called several times during the inferior
+ startup phase to re-parse breakpoint expressions after
+ a new shared library has been loaded. The language associated
+ to the current frame at this moment is not relevant for
+ the breakpoint. Using it would therefore be silly, so it seems
+ better to rely on the current language rather than relying on
+ the current frame language to parse the expression. That's why
+ we do the following language detection only if the context block
+ has been specifically provided. */
+ struct symbol *func = block_linkage_function (block);
+
+ if (func != NULL)
+ lang = language_def (SYMBOL_LANGUAGE (func));
+ if (lang == NULL || lang->la_language == language_unknown)
+ lang = current_language;
+ }
+ else
+ lang = current_language;
+
expout_size = 10;
expout_ptr = 0;
expout = (struct expression *)
xmalloc (sizeof (struct expression) + EXP_ELEM_TO_BYTES (expout_size));
- expout->language_defn = current_language;
+ expout->language_defn = lang;
+ expout->gdbarch = get_current_arch ();
TRY_CATCH (except, RETURN_MASK_ALL)
{
- if (current_language->la_parser ())
- current_language->la_error (NULL);
+ if (lang->la_parser ())
+ lang->la_error (NULL);
}
if (except.reason < 0)
{
/* Record the actual number of expression elements, and then
reallocate the expression memory so that we free up any
- excess elements. */
+ excess elements. */
expout->nelts = expout_ptr;
expout = (struct expression *)
xrealloc ((char *) expout,
- sizeof (struct expression) + EXP_ELEM_TO_BYTES (expout_ptr));;
+ sizeof (struct expression) + EXP_ELEM_TO_BYTES (expout_ptr));
/* Convert expression from postfix form as generated by yacc
- parser, to a prefix form. */
+ parser, to a prefix form. */
if (expressiondebug)
dump_raw_expression (expout, gdb_stdlog,
if (out_subexp)
*out_subexp = subexp;
- current_language->la_post_parser (&expout, void_context_p);
+ lang->la_post_parser (&expout, void_context_p);
if (expressiondebug)
dump_prefix_expression (expout, gdb_stdlog);
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. If the parsing ends in the middle
+ of a field reference, but the reference is somehow invalid, throw
+ an exception. 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)
int subexp;
volatile struct gdb_exception except;
- TRY_CATCH (except, RETURN_MASK_ALL)
+ TRY_CATCH (except, RETURN_MASK_ERROR)
{
in_parse_field = 1;
exp = parse_exp_in_context (&string, 0, 0, 0, &subexp);
xfree (exp);
return NULL;
}
+
+ /* This might throw an exception. If so, we want to let it
+ propagate. */
val = evaluate_subexpression_type (exp, subexp);
+ /* (*NAME) is a part of the EXP memory block freed below. */
+ *name = xstrdup (*name);
xfree (exp);
return value_type (val);
}
-/* A post-parser that does nothing */
+/* A post-parser that does nothing. */
void
null_post_parser (struct expression **exp, int void_context_p)
{
}
+
+/* Parse floating point value P of length LEN.
+ Return 0 (false) if invalid, 1 (true) if valid.
+ The successfully parsed number is stored in D.
+ *SUFFIX points to the suffix of the number in P.
+
+ NOTE: This accepts the floating point syntax that sscanf accepts. */
+
+int
+parse_float (const char *p, int len, DOUBLEST *d, const char **suffix)
+{
+ char *copy;
+ char *s;
+ int n, num;
+
+ copy = xmalloc (len + 1);
+ memcpy (copy, p, len);
+ copy[len] = 0;
+
+ num = sscanf (copy, "%" DOUBLEST_SCAN_FORMAT "%n", d, &n);
+ xfree (copy);
+
+ /* The sscanf man page suggests not making any assumptions on the effect
+ of %n on the result, so we don't.
+ That is why we simply test num == 0. */
+ if (num == 0)
+ return 0;
+
+ *suffix = p + n;
+ return 1;
+}
+
+/* Parse floating point value P of length LEN, using the C syntax for floats.
+ Return 0 (false) if invalid, 1 (true) if valid.
+ The successfully parsed number is stored in *D.
+ Its type is taken from builtin_type (gdbarch) and is stored in *T. */
+
+int
+parse_c_float (struct gdbarch *gdbarch, const char *p, int len,
+ DOUBLEST *d, struct type **t)
+{
+ const char *suffix;
+ int suffix_len;
+ const struct builtin_type *builtin_types = builtin_type (gdbarch);
+
+ if (! parse_float (p, len, d, &suffix))
+ return 0;
+
+ suffix_len = p + len - suffix;
+
+ if (suffix_len == 0)
+ *t = builtin_types->builtin_double;
+ else if (suffix_len == 1)
+ {
+ /* Handle suffixes: 'f' for float, 'l' for long double. */
+ if (tolower (*suffix) == 'f')
+ *t = builtin_types->builtin_float;
+ else if (tolower (*suffix) == 'l')
+ *t = builtin_types->builtin_long_double;
+ else
+ return 0;
+ }
+ else
+ return 0;
+
+ return 1;
+}
\f
/* Stuff for maintaining a stack of types. Currently just used by C, but
probably useful for any language which declares its types "backwards". */
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;
+
+ 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)
{
xmalloc (type_stack_size * sizeof (*type_stack));
add_setshow_zinteger_cmd ("expression", class_maintenance,
- &expressiondebug, _("\
-Set expression debugging."), _("\
-Show expression debugging."), _("\
-When non-zero, the internal representation of expressions will be printed."),
+ &expressiondebug,
+ _("Set expression debugging."),
+ _("Show expression debugging."),
+ _("When non-zero, the internal representation "
+ "of expressions will be printed."),
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);
}