/* Evaluate expressions for GDB.
- Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008,
- 2009 Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
This file is part of GDB.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "gdb_string.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "value.h"
#include "expression.h"
#include "target.h"
#include "frame.h"
-#include "language.h" /* For CAST_IS_CONVERSION */
-#include "f-lang.h" /* for array bound stuff */
+#include "gdbthread.h"
+#include "language.h" /* For CAST_IS_CONVERSION. */
+#include "f-lang.h" /* For array bound stuff. */
#include "cp-abi.h"
#include "infcall.h"
#include "objc-lang.h"
#include "parser-defs.h"
#include "cp-support.h"
#include "ui-out.h"
-#include "exceptions.h"
#include "regcache.h"
#include "user-regs.h"
#include "valprint.h"
-#include "python/python.h"
-
-#include "gdb_assert.h"
-
+#include "gdb_obstack.h"
+#include "objfiles.h"
+#include "typeprint.h"
#include <ctype.h>
-/* This is defined in valops.c */
-extern int overload_resolution;
+/* Prototypes for local functions. */
-/* Prototypes for local functions. */
-
-static struct value *evaluate_subexp_for_sizeof (struct expression *, int *);
+static struct value *evaluate_subexp_for_sizeof (struct expression *, int *,
+ enum noside);
static struct value *evaluate_subexp_for_address (struct expression *,
int *, enum noside);
-static struct value *evaluate_subexp (struct type *, struct expression *,
- int *, enum noside);
-
-static char *get_label (struct expression *, int *);
+static value *evaluate_subexp_for_cast (expression *exp, int *pos,
+ enum noside noside,
+ struct type *type);
static struct value *evaluate_struct_tuple (struct value *,
struct expression *, int *,
struct expression *, int *, enum noside,
LONGEST, LONGEST);
-static struct value *
+struct value *
evaluate_subexp (struct type *expect_type, struct expression *exp,
int *pos, enum noside noside)
{
- return (*exp->language_defn->la_exp_desc->evaluate_exp)
+ struct value *retval;
+
+ gdb::optional<enable_thread_stack_temporaries> stack_temporaries;
+ if (*pos == 0 && target_has_execution
+ && exp->language_defn->la_language == language_cplus
+ && !thread_stack_temporaries_enabled_p (inferior_thread ()))
+ stack_temporaries.emplace (inferior_thread ());
+
+ retval = (*exp->language_defn->la_exp_desc->evaluate_exp)
(expect_type, exp, pos, noside);
+
+ if (stack_temporaries.has_value ()
+ && value_in_thread_stack_temporaries (retval, inferior_thread ()))
+ retval = value_non_lval (retval);
+
+ return retval;
}
\f
/* Parse the string EXP as a C expression, evaluate it,
and return the result as a number. */
CORE_ADDR
-parse_and_eval_address (char *exp)
+parse_and_eval_address (const char *exp)
{
- struct expression *expr = parse_expression (exp);
- CORE_ADDR addr;
- struct cleanup *old_chain =
- make_cleanup (free_current_contents, &expr);
-
- addr = value_as_address (evaluate_expression (expr));
- do_cleanups (old_chain);
- return addr;
-}
-
-/* Like parse_and_eval_address but takes a pointer to a char * variable
- and advanced that variable across the characters parsed. */
+ expression_up expr = parse_expression (exp);
-CORE_ADDR
-parse_and_eval_address_1 (char **expptr)
-{
- struct expression *expr = parse_exp_1 (expptr, (struct block *) 0, 0);
- CORE_ADDR addr;
- struct cleanup *old_chain =
- make_cleanup (free_current_contents, &expr);
-
- addr = value_as_address (evaluate_expression (expr));
- do_cleanups (old_chain);
- return addr;
+ return value_as_address (evaluate_expression (expr.get ()));
}
/* Like parse_and_eval_address, but treats the value of the expression
- as an integer, not an address, returns a LONGEST, not a CORE_ADDR */
+ as an integer, not an address, returns a LONGEST, not a CORE_ADDR. */
LONGEST
-parse_and_eval_long (char *exp)
+parse_and_eval_long (const char *exp)
{
- struct expression *expr = parse_expression (exp);
- LONGEST retval;
- struct cleanup *old_chain =
- make_cleanup (free_current_contents, &expr);
-
- retval = value_as_long (evaluate_expression (expr));
- do_cleanups (old_chain);
- return (retval);
+ expression_up expr = parse_expression (exp);
+
+ return value_as_long (evaluate_expression (expr.get ()));
}
struct value *
-parse_and_eval (char *exp)
+parse_and_eval (const char *exp)
{
- struct expression *expr = parse_expression (exp);
- struct value *val;
- struct cleanup *old_chain =
- make_cleanup (free_current_contents, &expr);
+ expression_up expr = parse_expression (exp);
- val = evaluate_expression (expr);
- do_cleanups (old_chain);
- return val;
+ return evaluate_expression (expr.get ());
}
/* Parse up to a comma (or to a closeparen)
EXPP is advanced to point to the comma. */
struct value *
-parse_to_comma_and_eval (char **expp)
+parse_to_comma_and_eval (const char **expp)
{
- struct expression *expr = parse_exp_1 (expp, (struct block *) 0, 1);
- struct value *val;
- struct cleanup *old_chain =
- make_cleanup (free_current_contents, &expr);
+ expression_up expr = parse_exp_1 (expp, 0, nullptr, 1);
- val = evaluate_expression (expr);
- do_cleanups (old_chain);
- return val;
+ return evaluate_expression (expr.get ());
}
\f
/* Evaluate an expression in internal prefix form
evaluate_expression (struct expression *exp)
{
int pc = 0;
+
return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_NORMAL);
}
evaluate_type (struct expression *exp)
{
int pc = 0;
+
return evaluate_subexp (NULL_TYPE, exp, &pc, EVAL_AVOID_SIDE_EFFECTS);
}
return evaluate_subexp (NULL_TYPE, exp, &subexp, EVAL_AVOID_SIDE_EFFECTS);
}
+/* Find the current value of a watchpoint on EXP. Return the value in
+ *VALP and *RESULTP and the chain of intermediate and final values
+ in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
+ not need them.
+
+ If PRESERVE_ERRORS is true, then exceptions are passed through.
+ Otherwise, if PRESERVE_ERRORS is false, then if a memory error
+ occurs while evaluating the expression, *RESULTP will be set to
+ NULL. *RESULTP may be a lazy value, if the result could not be
+ read from memory. It is used to determine whether a value is
+ user-specified (we should watch the whole value) or intermediate
+ (we should watch only the bit used to locate the final value).
+
+ If the final value, or any intermediate value, could not be read
+ from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
+ set to any referenced values. *VALP will never be a lazy value.
+ This is the value which we store in struct breakpoint.
+
+ If VAL_CHAIN is non-NULL, the values put into *VAL_CHAIN will be
+ released from the value chain. If VAL_CHAIN is NULL, all generated
+ values will be left on the value chain. */
+
+void
+fetch_subexp_value (struct expression *exp, int *pc, struct value **valp,
+ struct value **resultp,
+ std::vector<value_ref_ptr> *val_chain,
+ int preserve_errors)
+{
+ struct value *mark, *new_mark, *result;
+
+ *valp = NULL;
+ if (resultp)
+ *resultp = NULL;
+ if (val_chain)
+ val_chain->clear ();
+
+ /* Evaluate the expression. */
+ mark = value_mark ();
+ result = NULL;
+
+ try
+ {
+ result = evaluate_subexp (NULL_TYPE, exp, pc, EVAL_NORMAL);
+ }
+ catch (const gdb_exception &ex)
+ {
+ /* Ignore memory errors if we want watchpoints pointing at
+ inaccessible memory to still be created; otherwise, throw the
+ error to some higher catcher. */
+ switch (ex.error)
+ {
+ case MEMORY_ERROR:
+ if (!preserve_errors)
+ break;
+ /* Fall through. */
+ default:
+ throw;
+ break;
+ }
+ }
+
+ new_mark = value_mark ();
+ if (mark == new_mark)
+ return;
+ if (resultp)
+ *resultp = result;
+
+ /* Make sure it's not lazy, so that after the target stops again we
+ have a non-lazy previous value to compare with. */
+ if (result != NULL)
+ {
+ if (!value_lazy (result))
+ *valp = result;
+ else
+ {
+
+ try
+ {
+ value_fetch_lazy (result);
+ *valp = result;
+ }
+ catch (const gdb_exception_error &except)
+ {
+ }
+ }
+ }
+
+ if (val_chain)
+ {
+ /* Return the chain of intermediate values. We use this to
+ decide which addresses to watch. */
+ *val_chain = value_release_to_mark (mark);
+ }
+}
+
/* Extract a field operation from an expression. If the subexpression
of EXP starting at *SUBEXP is not a structure dereference
operation, return NULL. Otherwise, return the name of the
subexpression of the left-hand-side of the dereference. This is
used when completing field names. */
-char *
+const char *
extract_field_op (struct expression *exp, int *subexp)
{
int tem;
char *result;
+
if (exp->elts[*subexp].opcode != STRUCTOP_STRUCT
&& exp->elts[*subexp].opcode != STRUCTOP_PTR)
return NULL;
return result;
}
-/* If the next expression is an OP_LABELED, skips past it,
- returning the label. Otherwise, does nothing and returns NULL. */
-
-static char *
-get_label (struct expression *exp, int *pos)
-{
- if (exp->elts[*pos].opcode == OP_LABELED)
- {
- int pc = (*pos)++;
- char *name = &exp->elts[pc + 2].string;
- int tem = longest_to_int (exp->elts[pc + 1].longconst);
- (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
- return name;
- }
- else
- return NULL;
-}
-
-/* This function evaluates tuples (in (the deleted) Chill) or
- brace-initializers (in C/C++) for structure types. */
+/* This function evaluates brace-initializers (in C/C++) for
+ structure types. */
static struct value *
evaluate_struct_tuple (struct value *struct_val,
int *pos, enum noside noside, int nargs)
{
struct type *struct_type = check_typedef (value_type (struct_val));
- struct type *substruct_type = struct_type;
struct type *field_type;
int fieldno = -1;
- int variantno = -1;
- int subfieldno = -1;
+
while (--nargs >= 0)
{
- int pc = *pos;
struct value *val = NULL;
- int nlabels = 0;
int bitpos, bitsize;
bfd_byte *addr;
- /* Skip past the labels, and count them. */
- while (get_label (exp, pos) != NULL)
- nlabels++;
-
- do
- {
- char *label = get_label (exp, &pc);
- if (label)
- {
- for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type);
- fieldno++)
- {
- char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
- if (field_name != NULL && strcmp (field_name, label) == 0)
- {
- variantno = -1;
- subfieldno = fieldno;
- substruct_type = struct_type;
- goto found;
- }
- }
- for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type);
- fieldno++)
- {
- char *field_name = TYPE_FIELD_NAME (struct_type, fieldno);
- field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
- if ((field_name == 0 || *field_name == '\0')
- && TYPE_CODE (field_type) == TYPE_CODE_UNION)
- {
- variantno = 0;
- for (; variantno < TYPE_NFIELDS (field_type);
- variantno++)
- {
- substruct_type
- = TYPE_FIELD_TYPE (field_type, variantno);
- if (TYPE_CODE (substruct_type) == TYPE_CODE_STRUCT)
- {
- for (subfieldno = 0;
- subfieldno < TYPE_NFIELDS (substruct_type);
- subfieldno++)
- {
- if (strcmp(TYPE_FIELD_NAME (substruct_type,
- subfieldno),
- label) == 0)
- {
- goto found;
- }
- }
- }
- }
- }
- }
- error (_("there is no field named %s"), label);
- found:
- ;
- }
- else
- {
- /* Unlabelled tuple element - go to next field. */
- if (variantno >= 0)
- {
- subfieldno++;
- if (subfieldno >= TYPE_NFIELDS (substruct_type))
- {
- variantno = -1;
- substruct_type = struct_type;
- }
- }
- if (variantno < 0)
- {
- fieldno++;
- /* Skip static fields. */
- while (fieldno < TYPE_NFIELDS (struct_type)
- && field_is_static (&TYPE_FIELD (struct_type,
- fieldno)))
- fieldno++;
- subfieldno = fieldno;
- if (fieldno >= TYPE_NFIELDS (struct_type))
- error (_("too many initializers"));
- field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
- if (TYPE_CODE (field_type) == TYPE_CODE_UNION
- && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0')
- error (_("don't know which variant you want to set"));
- }
- }
+ fieldno++;
+ /* Skip static fields. */
+ while (fieldno < TYPE_NFIELDS (struct_type)
+ && field_is_static (&TYPE_FIELD (struct_type,
+ fieldno)))
+ fieldno++;
+ if (fieldno >= TYPE_NFIELDS (struct_type))
+ error (_("too many initializers"));
+ field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
+ if (TYPE_CODE (field_type) == TYPE_CODE_UNION
+ && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0')
+ error (_("don't know which variant you want to set"));
+
+ /* Here, struct_type is the type of the inner struct,
+ while substruct_type is the type of the inner struct.
+ These are the same for normal structures, but a variant struct
+ contains anonymous union fields that contain substruct fields.
+ The value fieldno is the index of the top-level (normal or
+ anonymous union) field in struct_field, while the value
+ subfieldno is the index of the actual real (named inner) field
+ in substruct_type. */
+
+ field_type = TYPE_FIELD_TYPE (struct_type, fieldno);
+ if (val == 0)
+ val = evaluate_subexp (field_type, exp, pos, noside);
+
+ /* Now actually set the field in struct_val. */
+
+ /* Assign val to field fieldno. */
+ if (value_type (val) != field_type)
+ val = value_cast (field_type, val);
+
+ bitsize = TYPE_FIELD_BITSIZE (struct_type, fieldno);
+ bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno);
+ addr = value_contents_writeable (struct_val) + bitpos / 8;
+ if (bitsize)
+ modify_field (struct_type, addr,
+ value_as_long (val), bitpos % 8, bitsize);
+ else
+ memcpy (addr, value_contents (val),
+ TYPE_LENGTH (value_type (val)));
- /* Here, struct_type is the type of the inner struct,
- while substruct_type is the type of the inner struct.
- These are the same for normal structures, but a variant struct
- contains anonymous union fields that contain substruct fields.
- The value fieldno is the index of the top-level (normal or
- anonymous union) field in struct_field, while the value
- subfieldno is the index of the actual real (named inner) field
- in substruct_type. */
-
- field_type = TYPE_FIELD_TYPE (substruct_type, subfieldno);
- if (val == 0)
- val = evaluate_subexp (field_type, exp, pos, noside);
-
- /* Now actually set the field in struct_val. */
-
- /* Assign val to field fieldno. */
- if (value_type (val) != field_type)
- val = value_cast (field_type, val);
-
- bitsize = TYPE_FIELD_BITSIZE (substruct_type, subfieldno);
- bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno);
- if (variantno >= 0)
- bitpos += TYPE_FIELD_BITPOS (substruct_type, subfieldno);
- addr = value_contents_writeable (struct_val) + bitpos / 8;
- if (bitsize)
- modify_field (addr, value_as_long (val),
- bitpos % 8, bitsize);
- else
- memcpy (addr, value_contents (val),
- TYPE_LENGTH (value_type (val)));
- }
- while (--nlabels > 0);
}
return struct_val;
}
-/* Recursive helper function for setting elements of array tuples for
- (the deleted) Chill. The target is ARRAY (which has bounds
- LOW_BOUND to HIGH_BOUND); the element value is ELEMENT; EXP, POS
- and NOSIDE are as usual. Evaluates index expresions and sets the
- specified element(s) of ARRAY to ELEMENT. Returns last index
- value. */
+/* Recursive helper function for setting elements of array tuples.
+ The target is ARRAY (which has bounds LOW_BOUND to HIGH_BOUND); the
+ element value is ELEMENT; EXP, POS and NOSIDE are as usual.
+ Evaluates index expressions and sets the specified element(s) of
+ ARRAY to ELEMENT. Returns last index value. */
static LONGEST
init_array_element (struct value *array, struct value *element,
{
LONGEST index;
int element_size = TYPE_LENGTH (value_type (element));
+
if (exp->elts[*pos].opcode == BINOP_COMMA)
{
(*pos)++;
return init_array_element (array, element,
exp, pos, noside, low_bound, high_bound);
}
- else if (exp->elts[*pos].opcode == BINOP_RANGE)
- {
- LONGEST low, high;
- (*pos)++;
- low = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
- high = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
- if (low < low_bound || high > high_bound)
- error (_("tuple range index out of range"));
- for (index = low; index <= high; index++)
- {
- memcpy (value_contents_raw (array)
- + (index - low_bound) * element_size,
- value_contents (element), element_size);
- }
- }
else
{
index = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
int pc = (*pos) + 1;
LONGEST low_bound, high_bound;
struct type *range = check_typedef (TYPE_INDEX_TYPE (value_type (array)));
- enum f90_range_type range_type = longest_to_int (exp->elts[pc].longconst);
+ enum range_type range_type
+ = (enum range_type) longest_to_int (exp->elts[pc].longconst);
*pos += 3;
{
default:
/* Perform integral promotion for ANSI C/C++.
- If not appropropriate for any particular language
+ If not appropriate for any particular language
it needs to modify this function. */
{
struct type *builtin_int = builtin_type (gdbarch)->builtin_int;
+
if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_int))
*arg1 = value_cast (builtin_int, *arg1);
}
case language_cplus:
case language_asm:
case language_objc:
+ case language_opencl:
/* No promotion required. */
break;
: builtin->builtin_long_long);
}
break;
-
+ case language_opencl:
+ if (result_len <= TYPE_LENGTH (lookup_signed_typename
+ (language, "int")))
+ {
+ promoted_type =
+ (unsigned_operation
+ ? lookup_unsigned_typename (language, "int")
+ : lookup_signed_typename (language, "int"));
+ }
+ else if (result_len <= TYPE_LENGTH (lookup_signed_typename
+ (language, "long")))
+ {
+ promoted_type =
+ (unsigned_operation
+ ? lookup_unsigned_typename (language, "long")
+ : lookup_signed_typename (language,"long"));
+ }
+ break;
default:
/* For other languages the result type is unchanged from gdb
version 6.7 for backward compatibility.
}
static int
-ptrmath_type_p (struct type *type)
+ptrmath_type_p (const struct language_defn *lang, struct type *type)
{
type = check_typedef (type);
- if (TYPE_CODE (type) == TYPE_CODE_REF)
+ if (TYPE_IS_REFERENCE (type))
type = TYPE_TARGET_TYPE (type);
switch (TYPE_CODE (type))
return 1;
case TYPE_CODE_ARRAY:
- return current_language->c_style_arrays;
+ return TYPE_VECTOR (type) ? 0 : lang->c_style_arrays;
default:
return 0;
}
}
+/* Represents a fake method with the given parameter types. This is
+ used by the parser to construct a temporary "expected" type for
+ method overload resolution. FLAGS is used as instance flags of the
+ new type, in order to be able to make the new type represent a
+ const/volatile overload. */
+
+class fake_method
+{
+public:
+ fake_method (type_instance_flags flags,
+ int num_types, struct type **param_types);
+ ~fake_method ();
+
+ /* The constructed type. */
+ struct type *type () { return &m_type; }
+
+private:
+ struct type m_type {};
+ main_type m_main_type {};
+};
+
+fake_method::fake_method (type_instance_flags flags,
+ int num_types, struct type **param_types)
+{
+ struct type *type = &m_type;
+
+ TYPE_MAIN_TYPE (type) = &m_main_type;
+ TYPE_LENGTH (type) = 1;
+ TYPE_CODE (type) = TYPE_CODE_METHOD;
+ TYPE_CHAIN (type) = type;
+ TYPE_INSTANCE_FLAGS (type) = flags;
+ if (num_types > 0)
+ {
+ if (param_types[num_types - 1] == NULL)
+ {
+ --num_types;
+ TYPE_VARARGS (type) = 1;
+ }
+ else if (TYPE_CODE (check_typedef (param_types[num_types - 1]))
+ == TYPE_CODE_VOID)
+ {
+ --num_types;
+ /* Caller should have ensured this. */
+ gdb_assert (num_types == 0);
+ TYPE_PROTOTYPED (type) = 1;
+ }
+ }
+
+ /* We don't use TYPE_ZALLOC here to allocate space as TYPE is owned by
+ neither an objfile nor a gdbarch. As a result we must manually
+ allocate memory for auxiliary fields, and free the memory ourselves
+ when we are done with it. */
+ TYPE_NFIELDS (type) = num_types;
+ TYPE_FIELDS (type) = (struct field *)
+ xzalloc (sizeof (struct field) * num_types);
+
+ while (num_types-- > 0)
+ TYPE_FIELD_TYPE (type, num_types) = param_types[num_types];
+}
+
+fake_method::~fake_method ()
+{
+ xfree (TYPE_FIELDS (&m_type));
+}
+
+/* Helper for evaluating an OP_VAR_VALUE. */
+
+value *
+evaluate_var_value (enum noside noside, const block *blk, symbol *var)
+{
+ /* JYG: We used to just return value_zero of the symbol type if
+ we're asked to avoid side effects. Otherwise we return
+ value_of_variable (...). However I'm not sure if
+ value_of_variable () has any side effect. We need a full value
+ object returned here for whatis_exp () to call evaluate_type ()
+ and then pass the full value to value_rtti_target_type () if we
+ are dealing with a pointer or reference to a base class and print
+ object is on. */
+
+ struct value *ret = NULL;
+
+ try
+ {
+ ret = value_of_variable (var, blk);
+ }
+
+ catch (const gdb_exception_error &except)
+ {
+ if (noside != EVAL_AVOID_SIDE_EFFECTS)
+ throw;
+
+ ret = value_zero (SYMBOL_TYPE (var), not_lval);
+ }
+
+ return ret;
+}
+
+/* Helper for evaluating an OP_VAR_MSYM_VALUE. */
+
+value *
+evaluate_var_msym_value (enum noside noside,
+ struct objfile *objfile, minimal_symbol *msymbol)
+{
+ CORE_ADDR address;
+ type *the_type = find_minsym_type_and_address (msymbol, objfile, &address);
+
+ if (noside == EVAL_AVOID_SIDE_EFFECTS && !TYPE_GNU_IFUNC (the_type))
+ return value_zero (the_type, not_lval);
+ else
+ return value_at_lazy (the_type, address);
+}
+
+/* Helper for returning a value when handling EVAL_SKIP. */
+
+value *
+eval_skip_value (expression *exp)
+{
+ return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
+}
+
+/* Evaluate a function call. The function to be called is in
+ ARGVEC[0] and the arguments passed to the function are in
+ ARGVEC[1..NARGS]. FUNCTION_NAME is the name of the function, if
+ known. DEFAULT_RETURN_TYPE is used as the function's return type
+ if the return type is unknown. */
+
+static value *
+eval_call (expression *exp, enum noside noside,
+ int nargs, value **argvec,
+ const char *function_name,
+ type *default_return_type)
+{
+ if (argvec[0] == NULL)
+ error (_("Cannot evaluate function -- may be inlined"));
+ if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ {
+ /* If the return type doesn't look like a function type,
+ call an error. This can happen if somebody tries to turn
+ a variable into a function call. */
+
+ type *ftype = value_type (argvec[0]);
+
+ if (TYPE_CODE (ftype) == TYPE_CODE_INTERNAL_FUNCTION)
+ {
+ /* We don't know anything about what the internal
+ function might return, but we have to return
+ something. */
+ return value_zero (builtin_type (exp->gdbarch)->builtin_int,
+ not_lval);
+ }
+ else if (TYPE_CODE (ftype) == TYPE_CODE_XMETHOD)
+ {
+ type *return_type
+ = result_type_of_xmethod (argvec[0],
+ gdb::make_array_view (argvec + 1,
+ nargs));
+
+ if (return_type == NULL)
+ error (_("Xmethod is missing return type."));
+ return value_zero (return_type, not_lval);
+ }
+ else if (TYPE_CODE (ftype) == TYPE_CODE_FUNC
+ || TYPE_CODE (ftype) == TYPE_CODE_METHOD)
+ {
+ if (TYPE_GNU_IFUNC (ftype))
+ {
+ CORE_ADDR address = value_address (argvec[0]);
+ type *resolved_type = find_gnu_ifunc_target_type (address);
+
+ if (resolved_type != NULL)
+ ftype = resolved_type;
+ }
+
+ type *return_type = TYPE_TARGET_TYPE (ftype);
+
+ if (return_type == NULL)
+ return_type = default_return_type;
+
+ if (return_type == NULL)
+ error_call_unknown_return_type (function_name);
+
+ return allocate_value (return_type);
+ }
+ else
+ error (_("Expression of type other than "
+ "\"Function returning ...\" used as function"));
+ }
+ switch (TYPE_CODE (value_type (argvec[0])))
+ {
+ case TYPE_CODE_INTERNAL_FUNCTION:
+ return call_internal_function (exp->gdbarch, exp->language_defn,
+ argvec[0], nargs, argvec + 1);
+ case TYPE_CODE_XMETHOD:
+ return call_xmethod (argvec[0], gdb::make_array_view (argvec + 1, nargs));
+ default:
+ return call_function_by_hand (argvec[0], default_return_type,
+ gdb::make_array_view (argvec + 1, nargs));
+ }
+}
+
+/* Helper for evaluating an OP_FUNCALL. */
+
+static value *
+evaluate_funcall (type *expect_type, expression *exp, int *pos,
+ enum noside noside)
+{
+ int tem;
+ int pc2 = 0;
+ value *arg1 = NULL;
+ value *arg2 = NULL;
+ int save_pos1;
+ symbol *function = NULL;
+ char *function_name = NULL;
+ const char *var_func_name = NULL;
+
+ int pc = (*pos);
+ (*pos) += 2;
+
+ exp_opcode op = exp->elts[*pos].opcode;
+ int nargs = longest_to_int (exp->elts[pc].longconst);
+ /* Allocate arg vector, including space for the function to be
+ called in argvec[0], a potential `this', and a terminating
+ NULL. */
+ value **argvec = (value **) alloca (sizeof (value *) * (nargs + 3));
+ if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
+ {
+ /* First, evaluate the structure into arg2. */
+ pc2 = (*pos)++;
+
+ if (op == STRUCTOP_MEMBER)
+ {
+ arg2 = evaluate_subexp_for_address (exp, pos, noside);
+ }
+ else
+ {
+ arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
+ }
+
+ /* If the function is a virtual function, then the aggregate
+ value (providing the structure) plays its part by providing
+ the vtable. Otherwise, it is just along for the ride: call
+ the function directly. */
+
+ arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
+
+ type *a1_type = check_typedef (value_type (arg1));
+ if (noside == EVAL_SKIP)
+ tem = 1; /* Set it to the right arg index so that all
+ arguments can also be skipped. */
+ else if (TYPE_CODE (a1_type) == TYPE_CODE_METHODPTR)
+ {
+ if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ arg1 = value_zero (TYPE_TARGET_TYPE (a1_type), not_lval);
+ else
+ arg1 = cplus_method_ptr_to_value (&arg2, arg1);
+
+ /* Now, say which argument to start evaluating from. */
+ nargs++;
+ tem = 2;
+ argvec[1] = arg2;
+ }
+ else if (TYPE_CODE (a1_type) == TYPE_CODE_MEMBERPTR)
+ {
+ struct type *type_ptr
+ = lookup_pointer_type (TYPE_SELF_TYPE (a1_type));
+ struct type *target_type_ptr
+ = lookup_pointer_type (TYPE_TARGET_TYPE (a1_type));
+
+ /* Now, convert these values to an address. */
+ arg2 = value_cast (type_ptr, arg2);
+
+ long mem_offset = value_as_long (arg1);
+
+ arg1 = value_from_pointer (target_type_ptr,
+ value_as_long (arg2) + mem_offset);
+ arg1 = value_ind (arg1);
+ tem = 1;
+ }
+ else
+ error (_("Non-pointer-to-member value used in pointer-to-member "
+ "construct"));
+ }
+ else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
+ {
+ /* Hair for method invocations. */
+ int tem2;
+
+ nargs++;
+ /* First, evaluate the structure into arg2. */
+ pc2 = (*pos)++;
+ tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
+ *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
+
+ if (op == STRUCTOP_STRUCT)
+ {
+ /* If v is a variable in a register, and the user types
+ v.method (), this will produce an error, because v has no
+ address.
+
+ A possible way around this would be to allocate a copy of
+ the variable on the stack, copy in the contents, call the
+ function, and copy out the contents. I.e. convert this
+ from call by reference to call by copy-return (or
+ whatever it's called). However, this does not work
+ because it is not the same: the method being called could
+ stash a copy of the address, and then future uses through
+ that address (after the method returns) would be expected
+ to use the variable itself, not some copy of it. */
+ arg2 = evaluate_subexp_for_address (exp, pos, noside);
+ }
+ else
+ {
+ arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
+
+ /* Check to see if the operator '->' has been overloaded.
+ If the operator has been overloaded replace arg2 with the
+ value returned by the custom operator and continue
+ evaluation. */
+ while (unop_user_defined_p (op, arg2))
+ {
+ struct value *value = NULL;
+ try
+ {
+ value = value_x_unop (arg2, op, noside);
+ }
+
+ catch (const gdb_exception_error &except)
+ {
+ if (except.error == NOT_FOUND_ERROR)
+ break;
+ else
+ throw;
+ }
+
+ arg2 = value;
+ }
+ }
+ /* Now, say which argument to start evaluating from. */
+ tem = 2;
+ }
+ else if (op == OP_SCOPE
+ && overload_resolution
+ && (exp->language_defn->la_language == language_cplus))
+ {
+ /* Unpack it locally so we can properly handle overload
+ resolution. */
+ char *name;
+ int local_tem;
+
+ pc2 = (*pos)++;
+ local_tem = longest_to_int (exp->elts[pc2 + 2].longconst);
+ (*pos) += 4 + BYTES_TO_EXP_ELEM (local_tem + 1);
+ struct type *type = exp->elts[pc2 + 1].type;
+ name = &exp->elts[pc2 + 3].string;
+
+ function = NULL;
+ function_name = NULL;
+ if (TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
+ {
+ function = cp_lookup_symbol_namespace (TYPE_NAME (type),
+ name,
+ get_selected_block (0),
+ VAR_DOMAIN).symbol;
+ if (function == NULL)
+ error (_("No symbol \"%s\" in namespace \"%s\"."),
+ name, TYPE_NAME (type));
+
+ tem = 1;
+ /* arg2 is left as NULL on purpose. */
+ }
+ else
+ {
+ gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
+ || TYPE_CODE (type) == TYPE_CODE_UNION);
+ function_name = name;
+
+ /* We need a properly typed value for method lookup. For
+ static methods arg2 is otherwise unused. */
+ arg2 = value_zero (type, lval_memory);
+ ++nargs;
+ tem = 2;
+ }
+ }
+ else if (op == OP_ADL_FUNC)
+ {
+ /* Save the function position and move pos so that the arguments
+ can be evaluated. */
+ int func_name_len;
+
+ save_pos1 = *pos;
+ tem = 1;
+
+ func_name_len = longest_to_int (exp->elts[save_pos1 + 3].longconst);
+ (*pos) += 6 + BYTES_TO_EXP_ELEM (func_name_len + 1);
+ }
+ else
+ {
+ /* Non-method function call. */
+ save_pos1 = *pos;
+ tem = 1;
+
+ /* If this is a C++ function wait until overload resolution. */
+ if (op == OP_VAR_VALUE
+ && overload_resolution
+ && (exp->language_defn->la_language == language_cplus))
+ {
+ (*pos) += 4; /* Skip the evaluation of the symbol. */
+ argvec[0] = NULL;
+ }
+ else
+ {
+ if (op == OP_VAR_MSYM_VALUE)
+ {
+ minimal_symbol *msym = exp->elts[*pos + 2].msymbol;
+ var_func_name = msym->print_name ();
+ }
+ else if (op == OP_VAR_VALUE)
+ {
+ symbol *sym = exp->elts[*pos + 2].symbol;
+ var_func_name = sym->print_name ();
+ }
+
+ argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
+ type *type = value_type (argvec[0]);
+ if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
+ type = TYPE_TARGET_TYPE (type);
+ if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
+ {
+ for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
+ {
+ argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type,
+ tem - 1),
+ exp, pos, noside);
+ }
+ }
+ }
+ }
+
+ /* Evaluate arguments (if not already done, e.g., namespace::func()
+ and overload-resolution is off). */
+ for (; tem <= nargs; tem++)
+ {
+ /* Ensure that array expressions are coerced into pointer
+ objects. */
+ argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
+ }
+
+ /* Signal end of arglist. */
+ argvec[tem] = 0;
+
+ if (noside == EVAL_SKIP)
+ return eval_skip_value (exp);
+
+ if (op == OP_ADL_FUNC)
+ {
+ struct symbol *symp;
+ char *func_name;
+ int name_len;
+ int string_pc = save_pos1 + 3;
+
+ /* Extract the function name. */
+ name_len = longest_to_int (exp->elts[string_pc].longconst);
+ func_name = (char *) alloca (name_len + 1);
+ strcpy (func_name, &exp->elts[string_pc + 1].string);
+
+ find_overload_match (gdb::make_array_view (&argvec[1], nargs),
+ func_name,
+ NON_METHOD, /* not method */
+ NULL, NULL, /* pass NULL symbol since
+ symbol is unknown */
+ NULL, &symp, NULL, 0, noside);
+
+ /* Now fix the expression being evaluated. */
+ exp->elts[save_pos1 + 2].symbol = symp;
+ argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
+ }
+
+ if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR
+ || (op == OP_SCOPE && function_name != NULL))
+ {
+ int static_memfuncp;
+ char *tstr;
+
+ /* Method invocation: stuff "this" as first parameter. If the
+ method turns out to be static we undo this below. */
+ argvec[1] = arg2;
+
+ if (op != OP_SCOPE)
+ {
+ /* Name of method from expression. */
+ tstr = &exp->elts[pc2 + 2].string;
+ }
+ else
+ tstr = function_name;
+
+ if (overload_resolution && (exp->language_defn->la_language
+ == language_cplus))
+ {
+ /* Language is C++, do some overload resolution before
+ evaluation. */
+ struct value *valp = NULL;
+
+ (void) find_overload_match (gdb::make_array_view (&argvec[1], nargs),
+ tstr,
+ METHOD, /* method */
+ &arg2, /* the object */
+ NULL, &valp, NULL,
+ &static_memfuncp, 0, noside);
+
+ if (op == OP_SCOPE && !static_memfuncp)
+ {
+ /* For the time being, we don't handle this. */
+ error (_("Call to overloaded function %s requires "
+ "`this' pointer"),
+ function_name);
+ }
+ argvec[1] = arg2; /* the ``this'' pointer */
+ argvec[0] = valp; /* Use the method found after overload
+ resolution. */
+ }
+ else
+ /* Non-C++ case -- or no overload resolution. */
+ {
+ struct value *temp = arg2;
+
+ argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
+ &static_memfuncp,
+ op == STRUCTOP_STRUCT
+ ? "structure" : "structure pointer");
+ /* value_struct_elt updates temp with the correct value of
+ the ``this'' pointer if necessary, so modify argvec[1] to
+ reflect any ``this'' changes. */
+ arg2
+ = value_from_longest (lookup_pointer_type(value_type (temp)),
+ value_address (temp)
+ + value_embedded_offset (temp));
+ argvec[1] = arg2; /* the ``this'' pointer */
+ }
+
+ /* Take out `this' if needed. */
+ if (static_memfuncp)
+ {
+ argvec[1] = argvec[0];
+ nargs--;
+ argvec++;
+ }
+ }
+ else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
+ {
+ /* Pointer to member. argvec[1] is already set up. */
+ argvec[0] = arg1;
+ }
+ else if (op == OP_VAR_VALUE || (op == OP_SCOPE && function != NULL))
+ {
+ /* Non-member function being called. */
+ /* fn: This can only be done for C++ functions. A C-style
+ function in a C++ program, for instance, does not have the
+ fields that are expected here. */
+
+ if (overload_resolution && (exp->language_defn->la_language
+ == language_cplus))
+ {
+ /* Language is C++, do some overload resolution before
+ evaluation. */
+ struct symbol *symp;
+ int no_adl = 0;
+
+ /* If a scope has been specified disable ADL. */
+ if (op == OP_SCOPE)
+ no_adl = 1;
+
+ if (op == OP_VAR_VALUE)
+ function = exp->elts[save_pos1+2].symbol;
+
+ (void) find_overload_match (gdb::make_array_view (&argvec[1], nargs),
+ NULL, /* no need for name */
+ NON_METHOD, /* not method */
+ NULL, function, /* the function */
+ NULL, &symp, NULL, no_adl, noside);
+
+ if (op == OP_VAR_VALUE)
+ {
+ /* Now fix the expression being evaluated. */
+ exp->elts[save_pos1+2].symbol = symp;
+ argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1,
+ noside);
+ }
+ else
+ argvec[0] = value_of_variable (symp, get_selected_block (0));
+ }
+ else
+ {
+ /* Not C++, or no overload resolution allowed. */
+ /* Nothing to be done; argvec already correctly set up. */
+ }
+ }
+ else
+ {
+ /* It is probably a C-style function. */
+ /* Nothing to be done; argvec already correctly set up. */
+ }
+
+ return eval_call (exp, noside, nargs, argvec, var_func_name, expect_type);
+}
+
+/* Helper for skipping all the arguments in an undetermined argument list.
+ This function was designed for use in the OP_F77_UNDETERMINED_ARGLIST
+ case of evaluate_subexp_standard as multiple, but not all, code paths
+ require a generic skip. */
+
+static void
+skip_undetermined_arglist (int nargs, struct expression *exp, int *pos,
+ enum noside noside)
+{
+ for (int i = 0; i < nargs; ++i)
+ evaluate_subexp (NULL_TYPE, exp, pos, noside);
+}
+
struct value *
evaluate_subexp_standard (struct type *expect_type,
struct expression *exp, int *pos,
{
enum exp_opcode op;
int tem, tem2, tem3;
- int pc, pc2 = 0, oldpos;
+ int pc, oldpos;
struct value *arg1 = NULL;
struct value *arg2 = NULL;
struct value *arg3;
struct type *type;
int nargs;
struct value **argvec;
- int upper, lower, retcode;
int code;
int ix;
long mem_offset;
struct type **arg_types;
- int save_pos1;
pc = (*pos)++;
op = exp->elts[pc].opcode;
tem = longest_to_int (exp->elts[pc + 2].longconst);
(*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
arg1 = value_aggregate_elt (exp->elts[pc + 1].type,
&exp->elts[pc + 3].string,
- 0, noside);
+ expect_type, 0, noside);
if (arg1 == NULL)
error (_("There is no field named %s"), &exp->elts[pc + 3].string);
return arg1;
return value_from_longest (exp->elts[pc + 1].type,
exp->elts[pc + 2].longconst);
- case OP_DOUBLE:
- (*pos) += 3;
- return value_from_double (exp->elts[pc + 1].type,
- exp->elts[pc + 2].doubleconst);
-
- case OP_DECFLOAT:
+ case OP_FLOAT:
(*pos) += 3;
- return value_from_decfloat (exp->elts[pc + 1].type,
- exp->elts[pc + 2].decfloatconst);
+ return value_from_contents (exp->elts[pc + 1].type,
+ exp->elts[pc + 2].floatconst);
+ case OP_ADL_FUNC:
case OP_VAR_VALUE:
- (*pos) += 3;
+ {
+ (*pos) += 3;
+ symbol *var = exp->elts[pc + 2].symbol;
+ if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_ERROR)
+ error_unknown_type (var->print_name ());
+ if (noside != EVAL_SKIP)
+ return evaluate_var_value (noside, exp->elts[pc + 1].block, var);
+ else
+ {
+ /* Return a dummy value of the correct type when skipping, so
+ that parent functions know what is to be skipped. */
+ return allocate_value (SYMBOL_TYPE (var));
+ }
+ }
+
+ case OP_VAR_MSYM_VALUE:
+ {
+ (*pos) += 3;
+
+ minimal_symbol *msymbol = exp->elts[pc + 2].msymbol;
+ value *val = evaluate_var_msym_value (noside,
+ exp->elts[pc + 1].objfile,
+ msymbol);
+
+ type = value_type (val);
+ if (TYPE_CODE (type) == TYPE_CODE_ERROR
+ && (noside != EVAL_AVOID_SIDE_EFFECTS || pc != 0))
+ error_unknown_type (msymbol->print_name ());
+ return val;
+ }
+
+ case OP_VAR_ENTRY_VALUE:
+ (*pos) += 2;
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
+
+ {
+ struct symbol *sym = exp->elts[pc + 1].symbol;
+ struct frame_info *frame;
+
+ if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ return value_zero (SYMBOL_TYPE (sym), not_lval);
+
+ if (SYMBOL_COMPUTED_OPS (sym) == NULL
+ || SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry == NULL)
+ error (_("Symbol \"%s\" does not have any specific entry value"),
+ sym->print_name ());
+
+ frame = get_selected_frame (NULL);
+ return SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry (sym, frame);
+ }
- /* JYG: We used to just return value_zero of the symbol type
- if we're asked to avoid side effects. Otherwise we return
- value_of_variable (...). However I'm not sure if
- value_of_variable () has any side effect.
- We need a full value object returned here for whatis_exp ()
- to call evaluate_type () and then pass the full value to
- value_rtti_target_type () if we are dealing with a pointer
- or reference to a base class and print object is on. */
+ case OP_FUNC_STATIC_VAR:
+ tem = longest_to_int (exp->elts[pc + 1].longconst);
+ (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
+ if (noside == EVAL_SKIP)
+ return eval_skip_value (exp);
{
- volatile struct gdb_exception except;
- struct value *ret = NULL;
+ value *func = evaluate_subexp_standard (NULL, exp, pos, noside);
+ CORE_ADDR addr = value_address (func);
- TRY_CATCH (except, RETURN_MASK_ERROR)
- {
- ret = value_of_variable (exp->elts[pc + 2].symbol,
- exp->elts[pc + 1].block);
- }
+ const block *blk = block_for_pc (addr);
+ const char *var = &exp->elts[pc + 2].string;
- if (except.reason < 0)
- {
- if (noside == EVAL_AVOID_SIDE_EFFECTS)
- ret = value_zero (SYMBOL_TYPE (exp->elts[pc + 2].symbol), not_lval);
- else
- throw_exception (except);
- }
+ struct block_symbol sym = lookup_symbol (var, blk, VAR_DOMAIN, NULL);
+
+ if (sym.symbol == NULL)
+ error (_("No symbol \"%s\" in specified context."), var);
- return ret;
+ return evaluate_var_value (noside, sym.block, sym.symbol);
}
case OP_LAST:
struct value *val;
(*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
- regno = user_reg_map_name_to_regnum (current_gdbarch,
+ regno = user_reg_map_name_to_regnum (exp->gdbarch,
name, strlen (name));
if (regno == -1)
error (_("Register $%s not available."), name);
So for these registers, we fetch the register value regardless
of the evaluation mode. */
if (noside == EVAL_AVOID_SIDE_EFFECTS
- && regno < gdbarch_num_regs (current_gdbarch)
- + gdbarch_num_pseudo_regs (current_gdbarch))
- val = value_zero (register_type (current_gdbarch, regno), not_lval);
+ && regno < gdbarch_num_cooked_regs (exp->gdbarch))
+ val = value_zero (register_type (exp->gdbarch, regno), not_lval);
else
val = value_of_register (regno, get_selected_frame (NULL));
if (val == NULL)
case OP_INTERNALVAR:
(*pos) += 2;
- return value_of_internalvar (exp->elts[pc + 1].internalvar);
+ return value_of_internalvar (exp->gdbarch,
+ exp->elts[pc + 1].internalvar);
case OP_STRING:
tem = longest_to_int (exp->elts[pc + 1].longconst);
(*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
if (noside == EVAL_SKIP)
- goto nosideret;
- return value_string (&exp->elts[pc + 2].string, tem);
+ return eval_skip_value (exp);
+ type = language_string_char_type (exp->language_defn, exp->gdbarch);
+ return value_string (&exp->elts[pc + 2].string, tem, type);
- case OP_OBJC_NSSTRING: /* Objective C Foundation Class NSString constant. */
+ case OP_OBJC_NSSTRING: /* Objective C Foundation Class
+ NSString constant. */
tem = longest_to_int (exp->elts[pc + 1].longconst);
(*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
if (noside == EVAL_SKIP)
- {
- goto nosideret;
- }
- return (struct value *) value_nsstring (&exp->elts[pc + 2].string, tem + 1);
-
- case OP_BITSTRING:
- tem = longest_to_int (exp->elts[pc + 1].longconst);
- (*pos)
- += 3 + BYTES_TO_EXP_ELEM ((tem + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT);
- if (noside == EVAL_SKIP)
- goto nosideret;
- return value_bitstring (&exp->elts[pc + 2].string, tem);
- break;
+ return eval_skip_value (exp);
+ return value_nsstring (exp->gdbarch, &exp->elts[pc + 2].string, tem + 1);
case OP_ARRAY:
(*pos) += 3;
&& TYPE_CODE (type) == TYPE_CODE_STRUCT)
{
struct value *rec = allocate_value (expect_type);
+
memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type));
return evaluate_struct_tuple (rec, exp, pos, noside, nargs);
}
struct value *array = allocate_value (expect_type);
int element_size = TYPE_LENGTH (check_typedef (element_type));
LONGEST low_bound, high_bound, index;
+
if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
{
low_bound = 0;
{
struct value *element;
int index_pc = 0;
- if (exp->elts[*pos].opcode == BINOP_RANGE)
- {
- index_pc = ++(*pos);
- evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
- }
+
element = evaluate_subexp (element_type, exp, pos, noside);
if (value_type (element) != element_type)
element = value_cast (element_type, element);
if (index_pc)
{
int continue_pc = *pos;
+
*pos = index_pc;
index = init_array_element (array, element, exp, pos, noside,
low_bound, high_bound);
else
{
if (index > high_bound)
- /* to avoid memory corruption */
+ /* To avoid memory corruption. */
error (_("Too many array elements"));
memcpy (value_contents_raw (array)
+ (index - low_bound) * element_size,
struct type *check_type = element_type;
LONGEST low_bound, high_bound;
- /* get targettype of elementtype */
- while (TYPE_CODE (check_type) == TYPE_CODE_RANGE ||
- TYPE_CODE (check_type) == TYPE_CODE_TYPEDEF)
+ /* Get targettype of elementtype. */
+ while (TYPE_CODE (check_type) == TYPE_CODE_RANGE
+ || TYPE_CODE (check_type) == TYPE_CODE_TYPEDEF)
check_type = TYPE_TARGET_TYPE (check_type);
if (get_discrete_bounds (element_type, &low_bound, &high_bound) < 0)
LONGEST range_low, range_high;
struct type *range_low_type, *range_high_type;
struct value *elem_val;
- if (exp->elts[*pos].opcode == BINOP_RANGE)
- {
- (*pos)++;
- elem_val = evaluate_subexp (element_type, exp, pos, noside);
- range_low_type = value_type (elem_val);
- range_low = value_as_long (elem_val);
- elem_val = evaluate_subexp (element_type, exp, pos, noside);
- range_high_type = value_type (elem_val);
- range_high = value_as_long (elem_val);
- }
- else
- {
- elem_val = evaluate_subexp (element_type, exp, pos, noside);
- range_low_type = range_high_type = value_type (elem_val);
- range_low = range_high = value_as_long (elem_val);
- }
- /* check types of elements to avoid mixture of elements from
+
+ elem_val = evaluate_subexp (element_type, exp, pos, noside);
+ range_low_type = range_high_type = value_type (elem_val);
+ range_low = range_high = value_as_long (elem_val);
+
+ /* Check types of elements to avoid mixture of elements from
different types. Also check if type of element is "compatible"
- with element type of powerset */
+ with element type of powerset. */
if (TYPE_CODE (range_low_type) == TYPE_CODE_RANGE)
range_low_type = TYPE_TARGET_TYPE (range_low_type);
if (TYPE_CODE (range_high_type) == TYPE_CODE_RANGE)
range_high_type = TYPE_TARGET_TYPE (range_high_type);
- if ((TYPE_CODE (range_low_type) != TYPE_CODE (range_high_type)) ||
- (TYPE_CODE (range_low_type) == TYPE_CODE_ENUM &&
- (range_low_type != range_high_type)))
- /* different element modes */
+ if ((TYPE_CODE (range_low_type) != TYPE_CODE (range_high_type))
+ || (TYPE_CODE (range_low_type) == TYPE_CODE_ENUM
+ && (range_low_type != range_high_type)))
+ /* different element modes. */
error (_("POWERSET tuple elements of different mode"));
- if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type)) ||
- (TYPE_CODE (check_type) == TYPE_CODE_ENUM &&
- range_low_type != check_type))
+ if ((TYPE_CODE (check_type) != TYPE_CODE (range_low_type))
+ || (TYPE_CODE (check_type) == TYPE_CODE_ENUM
+ && range_low_type != check_type))
error (_("incompatible POWERSET tuple elements"));
if (range_low > range_high)
{
for (; range_low <= range_high; range_low++)
{
int bit_index = (unsigned) range_low % TARGET_CHAR_BIT;
- if (gdbarch_bits_big_endian (current_gdbarch))
+
+ if (gdbarch_byte_order (exp->gdbarch) == BFD_ENDIAN_BIG)
bit_index = TARGET_CHAR_BIT - 1 - bit_index;
valaddr[(unsigned) range_low / TARGET_CHAR_BIT]
|= 1 << bit_index;
return set;
}
- argvec = (struct value **) alloca (sizeof (struct value *) * nargs);
+ argvec = XALLOCAVEC (struct value *, nargs);
for (tem = 0; tem < nargs; tem++)
{
- /* Ensure that array expressions are coerced into pointer objects. */
+ /* Ensure that array expressions are coerced into pointer
+ objects. */
argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
}
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
return value_array (tem2, tem3, argvec);
case TERNOP_SLICE:
{
struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
int lowbound
- = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
+ = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
int upper
- = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
+ = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
+
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
return value_slice (array, lowbound, upper - lowbound + 1);
}
- case TERNOP_SLICE_COUNT:
- {
- struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
- int lowbound
- = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
- int length
- = value_as_long (evaluate_subexp (NULL_TYPE, exp, pos, noside));
- return value_slice (array, lowbound, length);
- }
-
case TERNOP_COND:
/* Skip third and second args to evaluate the first one. */
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
(*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (sel[len] != 0)
sel[len] = 0; /* Make sure it's terminated. */
selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr;
- return value_from_longest (selector_type, lookup_child_selector (sel));
+ return value_from_longest (selector_type,
+ lookup_child_selector (exp->gdbarch, sel));
}
case OP_OBJC_MSGCALL:
CORE_ADDR selector = 0;
int struct_return = 0;
- int sub_no_side = 0;
+ enum noside sub_no_side = EVAL_NORMAL;
struct value *msg_send = NULL;
struct value *msg_send_stret = NULL;
selector = exp->elts[pc + 1].longconst;
nargs = exp->elts[pc + 2].longconst;
- argvec = (struct value **) alloca (sizeof (struct value *)
- * (nargs + 5));
+ argvec = XALLOCAVEC (struct value *, nargs + 5);
(*pos) += 3;
if (value_as_long (target) == 0)
return value_from_longest (long_type, 0);
- if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0))
+ if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0).minsym)
gnu_runtime = 1;
/* Find the method dispatch (Apple runtime) or method lookup
to lookup the symbol information for the method. If we
can't find any symbol information, then we'll use these to
call the method, otherwise we can call the method
- directly. The msg_send_stret function is used in the special
+ directly. The msg_send_stret function is used in the special
case of a method that returns a structure (Apple runtime
only). */
if (gnu_runtime)
{
- struct type *type = selector_type;
+ type = selector_type;
+
type = lookup_function_type (type);
type = lookup_pointer_type (type);
type = lookup_function_type (type);
else
{
msg_send = find_function_in_inferior ("objc_msgSend", NULL);
- /* Special dispatcher for methods returning structs */
+ /* Special dispatcher for methods returning structs. */
msg_send_stret
= find_function_in_inferior ("objc_msgSend_stret", NULL);
}
- /* Verify the target object responds to this method. The
+ /* Verify the target object responds to this method. The
standard top-level 'Object' class uses a different name for
the verification method than the non-standard, but more
- often used, 'NSObject' class. Make sure we check for both. */
+ often used, 'NSObject' class. Make sure we check for both. */
- responds_selector = lookup_child_selector ("respondsToSelector:");
+ responds_selector
+ = lookup_child_selector (exp->gdbarch, "respondsToSelector:");
if (responds_selector == 0)
- responds_selector = lookup_child_selector ("respondsTo:");
+ responds_selector
+ = lookup_child_selector (exp->gdbarch, "respondsTo:");
if (responds_selector == 0)
error (_("no 'respondsTo:' or 'respondsToSelector:' method"));
- method_selector = lookup_child_selector ("methodForSelector:");
+ method_selector
+ = lookup_child_selector (exp->gdbarch, "methodForSelector:");
if (method_selector == 0)
- method_selector = lookup_child_selector ("methodFor:");
+ method_selector
+ = lookup_child_selector (exp->gdbarch, "methodFor:");
if (method_selector == 0)
error (_("no 'methodFor:' or 'methodForSelector:' method"));
/* Call the verification method, to make sure that the target
- class implements the desired method. */
+ class implements the desired method. */
argvec[0] = msg_send;
argvec[1] = target;
argvec[3] = value_from_longest (long_type, selector);
argvec[4] = 0;
- ret = call_function_by_hand (argvec[0], 3, argvec + 1);
+ ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3});
if (gnu_runtime)
{
/* Function objc_msg_lookup returns a pointer. */
argvec[0] = ret;
- ret = call_function_by_hand (argvec[0], 3, argvec + 1);
+ ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3});
}
if (value_as_long (ret) == 0)
error (_("Target does not respond to this message selector."));
function method that implements this selector for this
class. If we can find a symbol at that address, then we
know the return type, parameter types etc. (that's a good
- thing). */
+ thing). */
argvec[0] = msg_send;
argvec[1] = target;
argvec[3] = value_from_longest (long_type, selector);
argvec[4] = 0;
- ret = call_function_by_hand (argvec[0], 3, argvec + 1);
+ ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3});
if (gnu_runtime)
{
argvec[0] = ret;
- ret = call_function_by_hand (argvec[0], 3, argvec + 1);
+ ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3});
}
/* ret should now be the selector. */
if (addr)
{
struct symbol *sym = NULL;
- /* Is it a high_level symbol? */
+ /* The address might point to a function descriptor;
+ resolve it to the actual code address instead. */
+ addr = gdbarch_convert_from_func_ptr_addr (exp->gdbarch, addr,
+ current_top_target ());
+
+ /* Is it a high_level symbol? */
sym = find_pc_function (addr);
if (sym != NULL)
method = value_of_variable (sym, 0);
if (method)
{
- struct block *b;
CORE_ADDR funaddr;
struct type *val_type;
funaddr = find_function_addr (method, &val_type);
- b = block_for_pc (funaddr);
+ block_for_pc (funaddr);
- CHECK_TYPEDEF (val_type);
+ val_type = check_typedef (val_type);
if ((val_type == NULL)
|| (TYPE_CODE(val_type) == TYPE_CODE_ERROR))
val_type = expect_type;
}
- struct_return = using_struct_return (value_type (method), val_type);
+ struct_return = using_struct_return (exp->gdbarch, method,
+ val_type);
}
else if (expect_type != NULL)
{
- struct_return = using_struct_return (NULL,
+ struct_return = using_struct_return (exp->gdbarch, NULL,
check_typedef (expect_type));
}
if (method)
{
- if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
- error (_("method address has symbol information with non-function type; skipping"));
- if (struct_return)
- set_value_address (method, value_as_address (msg_send_stret));
- else
- set_value_address (method, value_as_address (msg_send));
- called_method = method;
- }
- else
- {
- if (struct_return)
- called_method = msg_send_stret;
- else
- called_method = msg_send;
- }
-
- if (noside == EVAL_SKIP)
- goto nosideret;
-
- if (noside == EVAL_AVOID_SIDE_EFFECTS)
- {
- /* If the return type doesn't look like a function type,
- call an error. This can happen if somebody tries to
- turn a variable into a function call. This is here
- because people often want to call, eg, strcmp, which
- gdb doesn't know is a function. If gdb isn't asked for
- it's opinion (ie. through "whatis"), it won't offer
- it. */
-
- struct type *type = value_type (called_method);
- if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
- type = TYPE_TARGET_TYPE (type);
- type = TYPE_TARGET_TYPE (type);
-
- if (type)
- {
- if ((TYPE_CODE (type) == TYPE_CODE_ERROR) && expect_type)
- return allocate_value (expect_type);
- else
- return allocate_value (type);
- }
- else
- error (_("Expression of type other than \"method returning ...\" used as a method"));
- }
-
- /* Now depending on whether we found a symbol for the method,
- we will either call the runtime dispatcher or the method
- directly. */
-
- argvec[0] = called_method;
- argvec[1] = target;
- argvec[2] = value_from_longest (long_type, selector);
- /* User-supplied arguments. */
- for (tem = 0; tem < nargs; tem++)
- argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
- argvec[tem + 3] = 0;
-
- if (gnu_runtime && (method != NULL))
- {
- /* Function objc_msg_lookup returns a pointer. */
- deprecated_set_value_type (argvec[0],
- lookup_function_type (lookup_pointer_type (value_type (argvec[0]))));
- argvec[0] = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
- }
-
- ret = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
- return ret;
- }
- break;
-
- case OP_FUNCALL:
- (*pos) += 2;
- op = exp->elts[*pos].opcode;
- nargs = longest_to_int (exp->elts[pc + 1].longconst);
- /* Allocate arg vector, including space for the function to be
- called in argvec[0] and a terminating NULL */
- argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 3));
- if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
- {
- nargs++;
- /* First, evaluate the structure into arg2 */
- pc2 = (*pos)++;
-
- if (noside == EVAL_SKIP)
- goto nosideret;
-
- if (op == STRUCTOP_MEMBER)
- {
- arg2 = evaluate_subexp_for_address (exp, pos, noside);
- }
- else
- {
- arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
- }
-
- /* If the function is a virtual function, then the
- aggregate value (providing the structure) plays
- its part by providing the vtable. Otherwise,
- it is just along for the ride: call the function
- directly. */
-
- arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
-
- if (TYPE_CODE (check_typedef (value_type (arg1)))
- != TYPE_CODE_METHODPTR)
- error (_("Non-pointer-to-member value used in pointer-to-member "
- "construct"));
-
- if (noside == EVAL_AVOID_SIDE_EFFECTS)
- {
- struct type *method_type = check_typedef (value_type (arg1));
- arg1 = value_zero (method_type, not_lval);
- }
- else
- arg1 = cplus_method_ptr_to_value (&arg2, arg1);
-
- /* Now, say which argument to start evaluating from */
- tem = 2;
- }
- else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
- {
- /* Hair for method invocations */
- int tem2;
-
- nargs++;
- /* First, evaluate the structure into arg2 */
- pc2 = (*pos)++;
- tem2 = longest_to_int (exp->elts[pc2 + 1].longconst);
- *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1);
- if (noside == EVAL_SKIP)
- goto nosideret;
-
- if (op == STRUCTOP_STRUCT)
- {
- /* If v is a variable in a register, and the user types
- v.method (), this will produce an error, because v has
- no address.
-
- A possible way around this would be to allocate a
- copy of the variable on the stack, copy in the
- contents, call the function, and copy out the
- contents. I.e. convert this from call by reference
- to call by copy-return (or whatever it's called).
- However, this does not work because it is not the
- same: the method being called could stash a copy of
- the address, and then future uses through that address
- (after the method returns) would be expected to
- use the variable itself, not some copy of it. */
- arg2 = evaluate_subexp_for_address (exp, pos, noside);
- }
- else
- {
- arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
- }
- /* Now, say which argument to start evaluating from */
- tem = 2;
- }
- else
- {
- /* Non-method function call */
- save_pos1 = *pos;
- argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
- tem = 1;
- type = value_type (argvec[0]);
- if (type && TYPE_CODE (type) == TYPE_CODE_PTR)
- type = TYPE_TARGET_TYPE (type);
- if (type && TYPE_CODE (type) == TYPE_CODE_FUNC)
- {
- for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
- {
- /* pai: FIXME This seems to be coercing arguments before
- * overload resolution has been done! */
- argvec[tem] = evaluate_subexp (TYPE_FIELD_TYPE (type, tem - 1),
- exp, pos, noside);
- }
- }
- }
-
- /* Evaluate arguments */
- for (; tem <= nargs; tem++)
- {
- /* Ensure that array expressions are coerced into pointer objects. */
- argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
- }
-
- /* signal end of arglist */
- argvec[tem] = 0;
-
- if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR)
- {
- int static_memfuncp;
- char tstr[256];
-
- /* Method invocation : stuff "this" as first parameter */
- argvec[1] = arg2;
- /* Name of method from expression */
- strcpy (tstr, &exp->elts[pc2 + 2].string);
-
- if (overload_resolution && (exp->language_defn->la_language == language_cplus))
- {
- /* Language is C++, do some overload resolution before evaluation */
- struct value *valp = NULL;
+ if (TYPE_CODE (value_type (method)) != TYPE_CODE_FUNC)
+ error (_("method address has symbol information "
+ "with non-function type; skipping"));
+
+ /* Create a function pointer of the appropriate type, and
+ replace its value with the value of msg_send or
+ msg_send_stret. We must use a pointer here, as
+ msg_send and msg_send_stret are of pointer type, and
+ the representation may be different on systems that use
+ function descriptors. */
+ if (struct_return)
+ called_method
+ = value_from_pointer (lookup_pointer_type (value_type (method)),
+ value_as_address (msg_send_stret));
+ else
+ called_method
+ = value_from_pointer (lookup_pointer_type (value_type (method)),
+ value_as_address (msg_send));
+ }
+ else
+ {
+ if (struct_return)
+ called_method = msg_send_stret;
+ else
+ called_method = msg_send;
+ }
- /* Prepare list of argument types for overload resolution */
- arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
- for (ix = 1; ix <= nargs; ix++)
- arg_types[ix - 1] = value_type (argvec[ix]);
+ if (noside == EVAL_SKIP)
+ return eval_skip_value (exp);
- (void) find_overload_match (arg_types, nargs, tstr,
- 1 /* method */ , 0 /* strict match */ ,
- &arg2 /* the object */ , NULL,
- &valp, NULL, &static_memfuncp);
+ if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ {
+ /* If the return type doesn't look like a function type,
+ call an error. This can happen if somebody tries to
+ turn a variable into a function call. This is here
+ because people often want to call, eg, strcmp, which
+ gdb doesn't know is a function. If gdb isn't asked for
+ it's opinion (ie. through "whatis"), it won't offer
+ it. */
+ struct type *callee_type = value_type (called_method);
- argvec[1] = arg2; /* the ``this'' pointer */
- argvec[0] = valp; /* use the method found after overload resolution */
- }
- else
- /* Non-C++ case -- or no overload resolution */
- {
- struct value *temp = arg2;
- argvec[0] = value_struct_elt (&temp, argvec + 1, tstr,
- &static_memfuncp,
- op == STRUCTOP_STRUCT
- ? "structure" : "structure pointer");
- /* value_struct_elt updates temp with the correct value
- of the ``this'' pointer if necessary, so modify argvec[1] to
- reflect any ``this'' changes. */
- arg2 = value_from_longest (lookup_pointer_type(value_type (temp)),
- value_address (temp)
- + value_embedded_offset (temp));
- argvec[1] = arg2; /* the ``this'' pointer */
- }
+ if (callee_type && TYPE_CODE (callee_type) == TYPE_CODE_PTR)
+ callee_type = TYPE_TARGET_TYPE (callee_type);
+ callee_type = TYPE_TARGET_TYPE (callee_type);
- if (static_memfuncp)
+ if (callee_type)
{
- argvec[1] = argvec[0];
- nargs--;
- argvec++;
+ if ((TYPE_CODE (callee_type) == TYPE_CODE_ERROR) && expect_type)
+ return allocate_value (expect_type);
+ else
+ return allocate_value (callee_type);
}
- }
- else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR)
- {
- argvec[1] = arg2;
- argvec[0] = arg1;
- }
- else if (op == OP_VAR_VALUE)
- {
- /* Non-member function being called */
- /* fn: This can only be done for C++ functions. A C-style function
- in a C++ program, for instance, does not have the fields that
- are expected here */
-
- if (overload_resolution && (exp->language_defn->la_language == language_cplus))
- {
- /* Language is C++, do some overload resolution before evaluation */
- struct symbol *symp;
-
- /* Prepare list of argument types for overload resolution */
- arg_types = (struct type **) alloca (nargs * (sizeof (struct type *)));
- for (ix = 1; ix <= nargs; ix++)
- arg_types[ix - 1] = value_type (argvec[ix]);
-
- (void) find_overload_match (arg_types, nargs, NULL /* no need for name */ ,
- 0 /* not method */ , 0 /* strict match */ ,
- NULL, exp->elts[save_pos1+2].symbol /* the function */ ,
- NULL, &symp, NULL);
+ else
+ error (_("Expression of type other than "
+ "\"method returning ...\" used as a method"));
+ }
- /* Now fix the expression being evaluated */
- exp->elts[save_pos1+2].symbol = symp;
- argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside);
- }
- else
- {
- /* Not C++, or no overload resolution allowed */
- /* nothing to be done; argvec already correctly set up */
- }
- }
- else
- {
- /* It is probably a C-style function */
- /* nothing to be done; argvec already correctly set up */
- }
+ /* Now depending on whether we found a symbol for the method,
+ we will either call the runtime dispatcher or the method
+ directly. */
- do_call_it:
+ argvec[0] = called_method;
+ argvec[1] = target;
+ argvec[2] = value_from_longest (long_type, selector);
+ /* User-supplied arguments. */
+ for (tem = 0; tem < nargs; tem++)
+ argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside);
+ argvec[tem + 3] = 0;
- if (noside == EVAL_SKIP)
- goto nosideret;
- if (argvec[0] == NULL)
- error (_("Cannot evaluate function -- may be inlined"));
- if (noside == EVAL_AVOID_SIDE_EFFECTS)
- {
- /* If the return type doesn't look like a function type, call an
- error. This can happen if somebody tries to turn a variable into
- a function call. This is here because people often want to
- call, eg, strcmp, which gdb doesn't know is a function. If
- gdb isn't asked for it's opinion (ie. through "whatis"),
- it won't offer it. */
+ auto call_args = gdb::make_array_view (argvec + 1, nargs + 2);
- struct type *ftype =
- TYPE_TARGET_TYPE (value_type (argvec[0]));
+ if (gnu_runtime && (method != NULL))
+ {
+ /* Function objc_msg_lookup returns a pointer. */
+ deprecated_set_value_type (argvec[0],
+ lookup_pointer_type (lookup_function_type (value_type (argvec[0]))));
+ argvec[0] = call_function_by_hand (argvec[0], NULL, call_args);
+ }
- if (ftype)
- return allocate_value (TYPE_TARGET_TYPE (value_type (argvec[0])));
- else
- error (_("Expression of type other than \"Function returning ...\" used as function"));
- }
- if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_INTERNAL_FUNCTION)
- return call_internal_function (argvec[0], nargs, argvec + 1);
+ return call_function_by_hand (argvec[0], NULL, call_args);
+ }
+ break;
- return call_function_by_hand (argvec[0], nargs, argvec + 1);
- /* pai: FIXME save value from call_function_by_hand, then adjust pc by adjust_fn_pc if +ve */
+ case OP_FUNCALL:
+ return evaluate_funcall (expect_type, exp, pos, noside);
case OP_F77_UNDETERMINED_ARGLIST:
array subscript operations cannot be disambiguated
at parse time. We have made all array subscript operations,
substring operations as well as function calls come here
- and we now have to discover what the heck this thing actually was.
- If it is a function, we process just as if we got an OP_FUNCALL. */
+ and we now have to discover what the heck this thing actually was.
+ If it is a function, we process just as if we got an OP_FUNCALL. */
nargs = longest_to_int (exp->elts[pc + 1].longconst);
(*pos) += 2;
switch (code)
{
case TYPE_CODE_ARRAY:
- if (exp->elts[*pos].opcode == OP_F90_RANGE)
+ if (exp->elts[*pos].opcode == OP_RANGE)
return value_f90_subarray (arg1, exp, pos, noside);
else
- goto multi_f77_subscript;
+ {
+ if (noside == EVAL_SKIP)
+ {
+ skip_undetermined_arglist (nargs, exp, pos, noside);
+ /* Return the dummy value with the correct type. */
+ return arg1;
+ }
+ goto multi_f77_subscript;
+ }
case TYPE_CODE_STRING:
- if (exp->elts[*pos].opcode == OP_F90_RANGE)
+ if (exp->elts[*pos].opcode == OP_RANGE)
return value_f90_subarray (arg1, exp, pos, noside);
else
{
+ if (noside == EVAL_SKIP)
+ {
+ skip_undetermined_arglist (nargs, exp, pos, noside);
+ /* Return the dummy value with the correct type. */
+ return arg1;
+ }
arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
- return value_subscript (arg1, arg2);
+ return value_subscript (arg1, value_as_long (arg2));
}
case TYPE_CODE_PTR:
case TYPE_CODE_FUNC:
- /* It's a function call. */
+ case TYPE_CODE_INTERNAL_FUNCTION:
+ /* It's a function call. */
/* Allocate arg vector, including space for the function to be
- called in argvec[0] and a terminating NULL */
- argvec = (struct value **) alloca (sizeof (struct value *) * (nargs + 2));
+ called in argvec[0] and a terminating NULL. */
+ argvec = (struct value **)
+ alloca (sizeof (struct value *) * (nargs + 2));
argvec[0] = arg1;
tem = 1;
for (; tem <= nargs; tem++)
- argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
+ {
+ argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
+ /* Arguments in Fortran are passed by address. Coerce the
+ arguments here rather than in value_arg_coerce as otherwise
+ the call to malloc to place the non-lvalue parameters in
+ target memory is hit by this Fortran specific logic. This
+ results in malloc being called with a pointer to an integer
+ followed by an attempt to malloc the arguments to malloc in
+ target memory. Infinite recursion ensues. */
+ if (code == TYPE_CODE_PTR || code == TYPE_CODE_FUNC)
+ {
+ bool is_artificial
+ = TYPE_FIELD_ARTIFICIAL (value_type (arg1), tem - 1);
+ argvec[tem] = fortran_argument_convert (argvec[tem],
+ is_artificial);
+ }
+ }
argvec[tem] = 0; /* signal end of arglist */
- goto do_call_it;
+ if (noside == EVAL_SKIP)
+ return eval_skip_value (exp);
+ return eval_call (exp, noside, nargs, argvec, NULL, expect_type);
default:
error (_("Cannot perform substring on this type"));
case OP_COMPLEX:
/* We have a complex number, There should be 2 floating
- point numbers that compose it */
+ point numbers that compose it. */
(*pos) += 2;
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
(*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
+ arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
+ NULL, "structure");
if (noside == EVAL_AVOID_SIDE_EFFECTS)
- return value_zero (lookup_struct_elt_type (value_type (arg1),
- &exp->elts[pc + 2].string,
- 0),
- lval_memory);
- else
- {
- struct value *temp = arg1;
- return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
- NULL, "structure");
- }
+ arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
+ return arg3;
case STRUCTOP_PTR:
tem = longest_to_int (exp->elts[pc + 1].longconst);
(*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
+
+ /* Check to see if operator '->' has been overloaded. If so replace
+ arg1 with the value returned by evaluating operator->(). */
+ while (unop_user_defined_p (op, arg1))
+ {
+ struct value *value = NULL;
+ try
+ {
+ value = value_x_unop (arg1, op, noside);
+ }
+
+ catch (const gdb_exception_error &except)
+ {
+ if (except.error == NOT_FOUND_ERROR)
+ break;
+ else
+ throw;
+ }
+
+ arg1 = value;
+ }
/* JYG: if print object is on we need to replace the base type
with rtti type in order to continue on with successful
- lookup of member / method only available in the rtti type. */
+ lookup of member / method only available in the rtti type. */
{
- struct type *type = value_type (arg1);
+ struct type *arg_type = value_type (arg1);
struct type *real_type;
- int full, top, using_enc;
+ int full, using_enc;
+ LONGEST top;
struct value_print_options opts;
get_user_print_options (&opts);
- if (opts.objectprint && TYPE_TARGET_TYPE(type) &&
- (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
+ if (opts.objectprint && TYPE_TARGET_TYPE (arg_type)
+ && (TYPE_CODE (TYPE_TARGET_TYPE (arg_type)) == TYPE_CODE_STRUCT))
{
- real_type = value_rtti_target_type (arg1, &full, &top, &using_enc);
+ real_type = value_rtti_indirect_type (arg1, &full, &top,
+ &using_enc);
if (real_type)
- {
- if (TYPE_CODE (type) == TYPE_CODE_PTR)
- real_type = lookup_pointer_type (real_type);
- else
- real_type = lookup_reference_type (real_type);
-
arg1 = value_cast (real_type, arg1);
- }
}
}
+ arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
+ NULL, "structure pointer");
if (noside == EVAL_AVOID_SIDE_EFFECTS)
- return value_zero (lookup_struct_elt_type (value_type (arg1),
- &exp->elts[pc + 2].string,
- 0),
- lval_memory);
- else
- {
- struct value *temp = arg1;
- return value_struct_elt (&temp, NULL, &exp->elts[pc + 2].string,
- NULL, "structure pointer");
- }
+ arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
+ return arg3;
case STRUCTOP_MEMBER:
case STRUCTOP_MPTR:
arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
type = check_typedef (value_type (arg2));
switch (TYPE_CODE (type))
case TYPE_CODE_MEMBERPTR:
/* Now, convert these values to an address. */
- arg1 = value_cast (lookup_pointer_type (TYPE_DOMAIN_TYPE (type)),
- arg1);
+ arg1 = value_cast_pointers (lookup_pointer_type (TYPE_SELF_TYPE (type)),
+ arg1, 1);
mem_offset = value_as_long (arg2);
return value_ind (arg3);
default:
- error (_("non-pointer-to-member value used in pointer-to-member construct"));
+ error (_("non-pointer-to-member value used "
+ "in pointer-to-member construct"));
}
+ case TYPE_INSTANCE:
+ {
+ type_instance_flags flags
+ = (type_instance_flag_value) longest_to_int (exp->elts[pc + 1].longconst);
+ nargs = longest_to_int (exp->elts[pc + 2].longconst);
+ arg_types = (struct type **) alloca (nargs * sizeof (struct type *));
+ for (ix = 0; ix < nargs; ++ix)
+ arg_types[ix] = exp->elts[pc + 2 + ix + 1].type;
+
+ fake_method fake_expect_type (flags, nargs, arg_types);
+ *(pos) += 4 + nargs;
+ return evaluate_subexp_standard (fake_expect_type.type (), exp, pos,
+ noside);
+ }
+
case BINOP_CONCAT:
arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
else
case BINOP_ASSIGN:
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
- arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
+ /* Special-case assignments where the left-hand-side is a
+ convenience variable -- in these, don't bother setting an
+ expected type. This avoids a weird case where re-assigning a
+ string or array to an internal variable could error with "Too
+ many array elements". */
+ arg2 = evaluate_subexp (VALUE_LVAL (arg1) == lval_internalvar
+ ? NULL_TYPE : value_type (arg1),
+ exp, pos, noside);
if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
return arg1;
op = exp->elts[pc + 1].opcode;
if (binop_user_defined_p (op, arg1, arg2))
return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside);
- else if (op == BINOP_ADD && ptrmath_type_p (value_type (arg1)))
- arg2 = value_ptradd (arg1, arg2);
- else if (op == BINOP_SUB && ptrmath_type_p (value_type (arg1)))
- arg2 = value_ptrsub (arg1, arg2);
+ else if (op == BINOP_ADD && ptrmath_type_p (exp->language_defn,
+ value_type (arg1))
+ && is_integral_type (value_type (arg2)))
+ arg2 = value_ptradd (arg1, value_as_long (arg2));
+ else if (op == BINOP_SUB && ptrmath_type_p (exp->language_defn,
+ value_type (arg1))
+ && is_integral_type (value_type (arg2)))
+ arg2 = value_ptradd (arg1, - value_as_long (arg2));
else
{
struct value *tmp = arg1;
arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
- else if (ptrmath_type_p (value_type (arg1)))
- return value_ptradd (arg1, arg2);
- else if (ptrmath_type_p (value_type (arg2)))
- return value_ptradd (arg2, arg1);
+ else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
+ && is_integral_type (value_type (arg2)))
+ return value_ptradd (arg1, value_as_long (arg2));
+ else if (ptrmath_type_p (exp->language_defn, value_type (arg2))
+ && is_integral_type (value_type (arg1)))
+ return value_ptradd (arg2, value_as_long (arg1));
else
{
binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
- else if (ptrmath_type_p (value_type (arg1)))
+ else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
+ && ptrmath_type_p (exp->language_defn, value_type (arg2)))
{
- if (ptrmath_type_p (value_type (arg2)))
- {
- /* FIXME -- should be ptrdiff_t */
- type = builtin_type (exp->gdbarch)->builtin_long;
- return value_from_longest (type, value_ptrdiff (arg1, arg2));
- }
- else
- return value_ptrsub (arg1, arg2);
+ /* FIXME -- should be ptrdiff_t */
+ type = builtin_type (exp->gdbarch)->builtin_long;
+ return value_from_longest (type, value_ptrdiff (arg1, arg2));
}
+ else if (ptrmath_type_p (exp->language_defn, value_type (arg1))
+ && is_integral_type (value_type (arg2)))
+ return value_ptradd (arg1, - value_as_long (arg2));
else
{
binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
else
{
struct value *v_one, *retval;
- v_one = value_one (value_type (arg2), not_lval);
+ v_one = value_one (value_type (arg2));
binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one);
retval = value_binop (arg1, v_one, op);
return retval;
}
}
- case BINOP_RANGE:
+ case BINOP_SUBSCRIPT:
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
- error (_("':' operator used in invalid context"));
-
- case BINOP_SUBSCRIPT:
- arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
- arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
- if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
else
{
/* If the user attempts to subscript something that is not an
array or pointer type (like a plain int variable for example),
- then report this as an error. */
+ then report this as an error. */
arg1 = coerce_ref (arg1);
type = check_typedef (value_type (arg1));
if (noside == EVAL_AVOID_SIDE_EFFECTS)
return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
else
- return value_subscript (arg1, arg2);
+ return value_subscript (arg1, value_as_long (arg2));
}
-
- case BINOP_IN:
- arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
- arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
- if (noside == EVAL_SKIP)
- goto nosideret;
- type = language_bool_type (exp->language_defn, exp->gdbarch);
- return value_from_longest (type, (LONGEST) value_in (arg1, arg2));
-
case MULTI_SUBSCRIPT:
(*pos) += 2;
nargs = longest_to_int (exp->elts[pc + 1].longconst);
while (nargs-- > 0)
{
arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
- /* FIXME: EVAL_SKIP handling may not be correct. */
+ /* FIXME: EVAL_SKIP handling may not be correct. */
if (noside == EVAL_SKIP)
{
if (nargs > 0)
- {
- continue;
- }
- else
- {
- goto nosideret;
- }
+ continue;
+ return eval_skip_value (exp);
}
- /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
+ /* FIXME: EVAL_AVOID_SIDE_EFFECTS handling may not be correct. */
if (noside == EVAL_AVOID_SIDE_EFFECTS)
{
/* If the user attempts to subscript something that has no target
type (like a plain int variable for example), then report this
- as an error. */
+ as an error. */
type = TYPE_TARGET_TYPE (check_typedef (value_type (arg1)));
if (type != NULL)
case TYPE_CODE_PTR:
case TYPE_CODE_ARRAY:
case TYPE_CODE_STRING:
- arg1 = value_subscript (arg1, arg2);
- break;
-
- case TYPE_CODE_BITSTRING:
- type = language_bool_type (exp->language_defn, exp->gdbarch);
- arg1 = value_bitstring_subscript (type, arg1, arg2);
+ arg1 = value_subscript (arg1, value_as_long (arg2));
break;
default:
multi_f77_subscript:
{
- int subscript_array[MAX_FORTRAN_DIMS];
- int array_size_array[MAX_FORTRAN_DIMS];
+ LONGEST subscript_array[MAX_FORTRAN_DIMS];
int ndimensions = 1, i;
- struct type *tmp_type;
- int offset_item; /* The array offset where the item lives */
+ struct value *array = arg1;
if (nargs > MAX_FORTRAN_DIMS)
error (_("Too many subscripts for F77 (%d Max)"), MAX_FORTRAN_DIMS);
- tmp_type = check_typedef (value_type (arg1));
ndimensions = calc_f77_array_dims (type);
if (nargs != ndimensions)
gdb_assert (nargs > 0);
/* Now that we know we have a legal array subscript expression
- let us actually find out where this element exists in the array. */
+ let us actually find out where this element exists in the array. */
- offset_item = 0;
- /* Take array indices left to right */
+ /* Take array indices left to right. */
for (i = 0; i < nargs; i++)
{
- /* Evaluate each subscript, It must be a legal integer in F77 */
+ /* Evaluate each subscript; it must be a legal integer in F77. */
arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
- /* Fill in the subscript and array size arrays */
+ /* Fill in the subscript array. */
subscript_array[i] = value_as_long (arg2);
}
- /* Internal type of array is arranged right to left */
- for (i = 0; i < nargs; i++)
+ /* Internal type of array is arranged right to left. */
+ for (i = nargs; i > 0; i--)
{
- upper = f77_get_upperbound (tmp_type);
- lower = f77_get_lowerbound (tmp_type);
-
- array_size_array[nargs - i - 1] = upper - lower + 1;
-
- /* Zero-normalize subscripts so that offsetting will work. */
-
- subscript_array[nargs - i - 1] -= lower;
+ struct type *array_type = check_typedef (value_type (array));
+ LONGEST index = subscript_array[i - 1];
- /* If we are at the bottom of a multidimensional
- array type then keep a ptr to the last ARRAY
- type around for use when calling value_subscript()
- below. This is done because we pretend to value_subscript
- that we actually have a one-dimensional array
- of base element type that we apply a simple
- offset to. */
-
- if (i < nargs - 1)
- tmp_type = check_typedef (TYPE_TARGET_TYPE (tmp_type));
+ array = value_subscripted_rvalue (array, index,
+ f77_get_lowerbound (array_type));
}
- /* Now let us calculate the offset for this item */
-
- offset_item = subscript_array[ndimensions - 1];
-
- for (i = ndimensions - 1; i > 0; --i)
- offset_item =
- array_size_array[i - 1] * offset_item + subscript_array[i - 1];
-
- /* Construct a value node with the value of the offset */
-
- arg2 = value_from_longest (builtin_type_int32, offset_item);
-
- /* Let us now play a dirty trick: we will take arg1
- which is a value node pointing to the topmost level
- of the multidimensional array-set and pretend
- that it is actually a array of the final element
- type, this will ensure that value_subscript()
- returns the correct type value */
-
- deprecated_set_value_type (arg1, tmp_type);
- return value_subscripted_rvalue (arg1, arg2, 0);
+ return array;
}
case BINOP_LOGICAL_AND:
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
{
- arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
- goto nosideret;
+ evaluate_subexp (NULL_TYPE, exp, pos, noside);
+ return eval_skip_value (exp);
}
oldpos = *pos;
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
{
- arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
- goto nosideret;
+ evaluate_subexp (NULL_TYPE, exp, pos, noside);
+ return eval_skip_value (exp);
}
oldpos = *pos;
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
{
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
{
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
{
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
{
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
{
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (binop_user_defined_p (op, arg1, arg2))
{
return value_x_binop (arg1, arg2, op, OP_NULL, noside);
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
type = check_typedef (value_type (arg2));
- if (TYPE_CODE (type) != TYPE_CODE_INT)
+ if (TYPE_CODE (type) != TYPE_CODE_INT
+ && TYPE_CODE (type) != TYPE_CODE_ENUM)
error (_("Non-integral right operand for \"@\" operator."));
if (noside == EVAL_AVOID_SIDE_EFFECTS)
{
case UNOP_PLUS:
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (unop_user_defined_p (op, arg1))
return value_x_unop (arg1, op, noside);
else
case UNOP_NEG:
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (unop_user_defined_p (op, arg1))
return value_x_unop (arg1, op, noside);
else
case UNOP_COMPLEMENT:
/* C++: check for and handle destructor names. */
- op = exp->elts[*pos].opcode;
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (unop_user_defined_p (UNOP_COMPLEMENT, arg1))
return value_x_unop (arg1, UNOP_COMPLEMENT, noside);
else
case UNOP_LOGICAL_NOT:
arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (unop_user_defined_p (op, arg1))
return value_x_unop (arg1, op, noside);
else
type = check_typedef (value_type (arg1));
if (TYPE_CODE (type) == TYPE_CODE_METHODPTR
|| TYPE_CODE (type) == TYPE_CODE_MEMBERPTR)
- error (_("Attempt to dereference pointer to member without an object"));
+ error (_("Attempt to dereference pointer "
+ "to member without an object"));
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (unop_user_defined_p (op, arg1))
return value_x_unop (arg1, op, noside);
else if (noside == EVAL_AVOID_SIDE_EFFECTS)
{
type = check_typedef (value_type (arg1));
if (TYPE_CODE (type) == TYPE_CODE_PTR
- || TYPE_CODE (type) == TYPE_CODE_REF
+ || TYPE_IS_REFERENCE (type)
/* In C you can dereference an array to get the 1st elt. */
|| TYPE_CODE (type) == TYPE_CODE_ARRAY
)
case UNOP_ADDR:
/* C++: check for and handle pointer to members. */
- op = exp->elts[*pos].opcode;
-
if (noside == EVAL_SKIP)
{
evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
- goto nosideret;
+ return eval_skip_value (exp);
}
else
{
- struct value *retvalp = evaluate_subexp_for_address (exp, pos, noside);
+ struct value *retvalp = evaluate_subexp_for_address (exp, pos,
+ noside);
+
return retvalp;
}
if (noside == EVAL_SKIP)
{
evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
- goto nosideret;
+ return eval_skip_value (exp);
}
- return evaluate_subexp_for_sizeof (exp, pos);
+ return evaluate_subexp_for_sizeof (exp, pos, noside);
+
+ case UNOP_ALIGNOF:
+ {
+ type = value_type (evaluate_subexp (NULL_TYPE, exp, pos,
+ EVAL_AVOID_SIDE_EFFECTS));
+ /* FIXME: This should be size_t. */
+ struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
+ ULONGEST align = type_align (type);
+ if (align == 0)
+ error (_("could not determine alignment of type"));
+ return value_from_longest (size_type, align);
+ }
case UNOP_CAST:
(*pos) += 2;
type = exp->elts[pc + 1].type;
+ return evaluate_subexp_for_cast (exp, pos, noside, type);
+
+ case UNOP_CAST_TYPE:
+ arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
+ type = value_type (arg1);
+ return evaluate_subexp_for_cast (exp, pos, noside, type);
+
+ case UNOP_DYNAMIC_CAST:
+ arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
+ type = value_type (arg1);
arg1 = evaluate_subexp (type, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
- if (type != value_type (arg1))
- arg1 = value_cast (type, arg1);
- return arg1;
+ return eval_skip_value (exp);
+ return value_dynamic_cast (type, arg1);
+
+ case UNOP_REINTERPRET_CAST:
+ arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
+ type = value_type (arg1);
+ arg1 = evaluate_subexp (type, exp, pos, noside);
+ if (noside == EVAL_SKIP)
+ return eval_skip_value (exp);
+ return value_reinterpret_cast (type, arg1);
case UNOP_MEMVAL:
(*pos) += 2;
arg1 = evaluate_subexp (expect_type, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (noside == EVAL_AVOID_SIDE_EFFECTS)
return value_zero (exp->elts[pc + 1].type, lval_memory);
else
return value_at_lazy (exp->elts[pc + 1].type,
value_as_address (arg1));
- case UNOP_MEMVAL_TLS:
- (*pos) += 3;
+ case UNOP_MEMVAL_TYPE:
+ arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
+ type = value_type (arg1);
arg1 = evaluate_subexp (expect_type, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (noside == EVAL_AVOID_SIDE_EFFECTS)
- return value_zero (exp->elts[pc + 2].type, lval_memory);
+ return value_zero (type, lval_memory);
else
- {
- CORE_ADDR tls_addr;
- tls_addr = target_translate_tls_address (exp->elts[pc + 1].objfile,
- value_as_address (arg1));
- return value_at_lazy (exp->elts[pc + 2].type, tls_addr);
- }
+ return value_at_lazy (type, value_as_address (arg1));
case UNOP_PREINCREMENT:
arg1 = evaluate_subexp (expect_type, exp, pos, noside);
}
else
{
- arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
- if (ptrmath_type_p (value_type (arg1)))
- arg2 = value_ptradd (arg1, arg2);
+ if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
+ arg2 = value_ptradd (arg1, 1);
else
{
struct value *tmp = arg1;
+
+ arg2 = value_one (value_type (arg1));
binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
arg2 = value_binop (tmp, arg2, BINOP_ADD);
}
}
else
{
- arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
- if (ptrmath_type_p (value_type (arg1)))
- arg2 = value_ptrsub (arg1, arg2);
+ if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
+ arg2 = value_ptradd (arg1, -1);
else
{
struct value *tmp = arg1;
+
+ arg2 = value_one (value_type (arg1));
binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
arg2 = value_binop (tmp, arg2, BINOP_SUB);
}
}
else
{
- arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
- if (ptrmath_type_p (value_type (arg1)))
- arg2 = value_ptradd (arg1, arg2);
+ arg3 = value_non_lval (arg1);
+
+ if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
+ arg2 = value_ptradd (arg1, 1);
else
{
struct value *tmp = arg1;
+
+ arg2 = value_one (value_type (arg1));
binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
arg2 = value_binop (tmp, arg2, BINOP_ADD);
}
value_assign (arg1, arg2);
- return arg1;
+ return arg3;
}
case UNOP_POSTDECREMENT:
}
else
{
- arg2 = value_from_longest (builtin_type_uint8, (LONGEST) 1);
- if (ptrmath_type_p (value_type (arg1)))
- arg2 = value_ptrsub (arg1, arg2);
+ arg3 = value_non_lval (arg1);
+
+ if (ptrmath_type_p (exp->language_defn, value_type (arg1)))
+ arg2 = value_ptradd (arg1, -1);
else
{
struct value *tmp = arg1;
+
+ arg2 = value_one (value_type (arg1));
binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2);
arg2 = value_binop (tmp, arg2, BINOP_SUB);
}
value_assign (arg1, arg2);
- return arg1;
+ return arg3;
}
case OP_THIS:
(*pos) += 1;
- return value_of_this (1);
-
- case OP_OBJC_SELF:
- (*pos) += 1;
- return value_of_local ("self", 1);
+ return value_of_this (exp->language_defn);
case OP_TYPE:
/* The value is not supposed to be used. This is here to make it
easier to accommodate expressions that contain types. */
(*pos) += 2;
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
+ else if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ return allocate_value (exp->elts[pc + 1].type);
+ else
+ error (_("Attempt to use a type name as an expression"));
+
+ case OP_TYPEOF:
+ case OP_DECLTYPE:
+ if (noside == EVAL_SKIP)
+ {
+ evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
+ return eval_skip_value (exp);
+ }
else if (noside == EVAL_AVOID_SIDE_EFFECTS)
{
- struct type *type = exp->elts[pc + 1].type;
- /* If this is a typedef, then find its immediate target. We
- use check_typedef to resolve stubs, but we ignore its
- result because we do not want to dig past all
- typedefs. */
- check_typedef (type);
- if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
- type = TYPE_TARGET_TYPE (type);
- return allocate_value (type);
+ enum exp_opcode sub_op = exp->elts[*pos].opcode;
+ struct value *result;
+
+ result = evaluate_subexp (NULL_TYPE, exp, pos,
+ EVAL_AVOID_SIDE_EFFECTS);
+
+ /* 'decltype' has special semantics for lvalues. */
+ if (op == OP_DECLTYPE
+ && (sub_op == BINOP_SUBSCRIPT
+ || sub_op == STRUCTOP_MEMBER
+ || sub_op == STRUCTOP_MPTR
+ || sub_op == UNOP_IND
+ || sub_op == STRUCTOP_STRUCT
+ || sub_op == STRUCTOP_PTR
+ || sub_op == OP_SCOPE))
+ {
+ type = value_type (result);
+
+ if (!TYPE_IS_REFERENCE (type))
+ {
+ type = lookup_lvalue_reference_type (type);
+ result = allocate_value (type);
+ }
+ }
+
+ return result;
}
else
- error (_("Attempt to use a type name as an expression"));
+ error (_("Attempt to use a type as an expression"));
+
+ case OP_TYPEID:
+ {
+ struct value *result;
+ enum exp_opcode sub_op = exp->elts[*pos].opcode;
+
+ if (sub_op == OP_TYPE || sub_op == OP_DECLTYPE || sub_op == OP_TYPEOF)
+ result = evaluate_subexp (NULL_TYPE, exp, pos,
+ EVAL_AVOID_SIDE_EFFECTS);
+ else
+ result = evaluate_subexp (NULL_TYPE, exp, pos, noside);
+
+ if (noside != EVAL_NORMAL)
+ return allocate_value (cplus_typeid_type (exp->gdbarch));
+
+ return cplus_typeid (result);
+ }
default:
/* Removing this case and compiling with gcc -Wall reveals that
then they should be separate cases, with more descriptive
error messages. */
- error (_("\
-GDB does not (yet) know how to evaluate that kind of expression"));
+ error (_("GDB does not (yet) know how to "
+ "evaluate that kind of expression"));
}
-nosideret:
- return value_from_longest (builtin_type_int8, (LONGEST) 1);
+ gdb_assert_not_reached ("missed return?");
}
\f
/* Evaluate a subexpression of EXP, at index *POS,
goto default_case_after_eval;
}
- return x;
+ return coerce_array (x);
case UNOP_MEMVAL:
(*pos) += 3;
return value_cast (lookup_pointer_type (exp->elts[pc + 1].type),
evaluate_subexp (NULL_TYPE, exp, pos, noside));
+ case UNOP_MEMVAL_TYPE:
+ {
+ struct type *type;
+
+ (*pos) += 1;
+ x = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
+ type = value_type (x);
+ return value_cast (lookup_pointer_type (type),
+ evaluate_subexp (NULL_TYPE, exp, pos, noside));
+ }
+
case OP_VAR_VALUE:
var = exp->elts[pc + 2].symbol;
/* C++: The "address" of a reference should yield the address
- * of the object pointed to. Let value_addr() deal with it. */
- if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_REF)
+ * of the object pointed to. Let value_addr() deal with it. */
+ if (TYPE_IS_REFERENCE (SYMBOL_TYPE (var)))
goto default_case;
(*pos) += 4;
if (noside == EVAL_AVOID_SIDE_EFFECTS)
{
struct type *type =
- lookup_pointer_type (SYMBOL_TYPE (var));
+ lookup_pointer_type (SYMBOL_TYPE (var));
enum address_class sym_class = SYMBOL_CLASS (var);
if (sym_class == LOC_CONST
else
return address_of_variable (var, exp->elts[pc + 1].block);
+ case OP_VAR_MSYM_VALUE:
+ {
+ (*pos) += 4;
+
+ value *val = evaluate_var_msym_value (noside,
+ exp->elts[pc + 1].objfile,
+ exp->elts[pc + 2].msymbol);
+ if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ {
+ struct type *type = lookup_pointer_type (value_type (val));
+ return value_zero (type, not_lval);
+ }
+ else
+ return value_addr (val);
+ }
+
case OP_SCOPE:
tem = longest_to_int (exp->elts[pc + 2].longconst);
(*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1);
x = value_aggregate_elt (exp->elts[pc + 1].type,
&exp->elts[pc + 3].string,
- 1, noside);
+ NULL, 1, noside);
if (x == NULL)
error (_("There is no field named %s"), &exp->elts[pc + 3].string);
return x;
{
struct type *type = check_typedef (value_type (x));
- if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
- return value_zero (lookup_pointer_type (value_type (x)),
- not_lval);
- else if (TYPE_CODE (type) == TYPE_CODE_REF)
+ if (TYPE_IS_REFERENCE (type))
return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
not_lval);
+ else if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x))
+ return value_zero (lookup_pointer_type (value_type (x)),
+ not_lval);
else
- error (_("Attempt to take address of value not located in memory."));
+ error (_("Attempt to take address of "
+ "value not located in memory."));
}
return value_addr (x);
}
Note that we currently only do the coercion for C expressions, where
arrays are zero based and the coercion is correct. For other languages,
with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION
- to decide if coercion is appropriate.
-
- */
+ to decide if coercion is appropriate. */
struct value *
evaluate_subexp_with_coercion (struct expression *exp,
var = exp->elts[pc + 2].symbol;
type = check_typedef (SYMBOL_TYPE (var));
if (TYPE_CODE (type) == TYPE_CODE_ARRAY
- && CAST_IS_CONVERSION)
+ && !TYPE_VECTOR (type)
+ && CAST_IS_CONVERSION (exp->language_defn))
{
(*pos) += 4;
val = address_of_variable (var, exp->elts[pc + 1].block);
/* Evaluate a subexpression of EXP, at index *POS,
and return a value for the size of that subexpression.
- Advance *POS over the subexpression. */
+ Advance *POS over the subexpression. If NOSIDE is EVAL_NORMAL
+ we allow side-effects on the operand if its type is a variable
+ length array. */
static struct value *
-evaluate_subexp_for_sizeof (struct expression *exp, int *pos)
+evaluate_subexp_for_sizeof (struct expression *exp, int *pos,
+ enum noside noside)
{
/* FIXME: This should be size_t. */
struct type *size_type = builtin_type (exp->gdbarch)->builtin_int;
val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
type = check_typedef (value_type (val));
if (TYPE_CODE (type) != TYPE_CODE_PTR
- && TYPE_CODE (type) != TYPE_CODE_REF
+ && !TYPE_IS_REFERENCE (type)
&& TYPE_CODE (type) != TYPE_CODE_ARRAY)
error (_("Attempt to take contents of a non-pointer value."));
- type = check_typedef (TYPE_TARGET_TYPE (type));
+ type = TYPE_TARGET_TYPE (type);
+ if (is_dynamic_type (type))
+ type = value_type (value_ind (val));
return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
case UNOP_MEMVAL:
(*pos) += 3;
- type = check_typedef (exp->elts[pc + 1].type);
- return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
+ type = exp->elts[pc + 1].type;
+ break;
+
+ case UNOP_MEMVAL_TYPE:
+ (*pos) += 1;
+ val = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
+ type = value_type (val);
+ break;
case OP_VAR_VALUE:
- (*pos) += 4;
- type = check_typedef (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
- return
- value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
+ type = SYMBOL_TYPE (exp->elts[pc + 2].symbol);
+ if (is_dynamic_type (type))
+ {
+ val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
+ type = value_type (val);
+ if (TYPE_CODE (type) == TYPE_CODE_ARRAY
+ && is_dynamic_type (TYPE_INDEX_TYPE (type))
+ && TYPE_HIGH_BOUND_UNDEFINED (TYPE_INDEX_TYPE (type)))
+ return allocate_optimized_out_value (size_type);
+ }
+ else
+ (*pos) += 4;
+ break;
+
+ case OP_VAR_MSYM_VALUE:
+ {
+ (*pos) += 4;
+
+ minimal_symbol *msymbol = exp->elts[pc + 2].msymbol;
+ value *mval = evaluate_var_msym_value (noside,
+ exp->elts[pc + 1].objfile,
+ msymbol);
+
+ type = value_type (mval);
+ if (TYPE_CODE (type) == TYPE_CODE_ERROR)
+ error_unknown_type (msymbol->print_name ());
+
+ return value_from_longest (size_type, TYPE_LENGTH (type));
+ }
+ break;
+
+ /* Deal with the special case if NOSIDE is EVAL_NORMAL and the resulting
+ type of the subscript is a variable length array type. In this case we
+ must re-evaluate the right hand side of the subscription to allow
+ side-effects. */
+ case BINOP_SUBSCRIPT:
+ if (noside == EVAL_NORMAL)
+ {
+ int npc = (*pos) + 1;
+
+ val = evaluate_subexp (NULL_TYPE, exp, &npc, EVAL_AVOID_SIDE_EFFECTS);
+ type = check_typedef (value_type (val));
+ if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
+ {
+ type = check_typedef (TYPE_TARGET_TYPE (type));
+ if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
+ {
+ type = TYPE_INDEX_TYPE (type);
+ /* Only re-evaluate the right hand side if the resulting type
+ is a variable length type. */
+ if (TYPE_RANGE_DATA (type)->flag_bound_evaluated)
+ {
+ val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
+ return value_from_longest
+ (size_type, (LONGEST) TYPE_LENGTH (value_type (val)));
+ }
+ }
+ }
+ }
+
+ /* Fall through. */
default:
val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
- return value_from_longest (size_type,
- (LONGEST) TYPE_LENGTH (value_type (val)));
+ type = value_type (val);
+ break;
+ }
+
+ /* $5.3.3/2 of the C++ Standard (n3290 draft) says of sizeof:
+ "When applied to a reference or a reference type, the result is
+ the size of the referenced type." */
+ type = check_typedef (type);
+ if (exp->language_defn->la_language == language_cplus
+ && (TYPE_IS_REFERENCE (type)))
+ type = check_typedef (TYPE_TARGET_TYPE (type));
+ return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
+}
+
+/* Evaluate a subexpression of EXP, at index *POS, and return a value
+ for that subexpression cast to TO_TYPE. Advance *POS over the
+ subexpression. */
+
+static value *
+evaluate_subexp_for_cast (expression *exp, int *pos,
+ enum noside noside,
+ struct type *to_type)
+{
+ int pc = *pos;
+
+ /* Don't let symbols be evaluated with evaluate_subexp because that
+ throws an "unknown type" error for no-debug data symbols.
+ Instead, we want the cast to reinterpret the symbol. */
+ if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE
+ || exp->elts[pc].opcode == OP_VAR_VALUE)
+ {
+ (*pos) += 4;
+
+ value *val;
+ if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE)
+ {
+ if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ return value_zero (to_type, not_lval);
+
+ val = evaluate_var_msym_value (noside,
+ exp->elts[pc + 1].objfile,
+ exp->elts[pc + 2].msymbol);
+ }
+ else
+ val = evaluate_var_value (noside,
+ exp->elts[pc + 1].block,
+ exp->elts[pc + 2].symbol);
+
+ if (noside == EVAL_SKIP)
+ return eval_skip_value (exp);
+
+ val = value_cast (to_type, val);
+
+ /* Don't allow e.g. '&(int)var_with_no_debug_info'. */
+ if (VALUE_LVAL (val) == lval_memory)
+ {
+ if (value_lazy (val))
+ value_fetch_lazy (val);
+ VALUE_LVAL (val) = not_lval;
+ }
+ return val;
}
+
+ value *val = evaluate_subexp (to_type, exp, pos, noside);
+ if (noside == EVAL_SKIP)
+ return eval_skip_value (exp);
+ return value_cast (to_type, val);
}
-/* Parse a type expression in the string [P..P+LENGTH). */
+/* Parse a type expression in the string [P..P+LENGTH). */
struct type *
parse_and_eval_type (char *p, int length)
{
char *tmp = (char *) alloca (length + 4);
- struct expression *expr;
+
tmp[0] = '(';
memcpy (tmp + 1, p, length);
tmp[length + 1] = ')';
tmp[length + 2] = '0';
tmp[length + 3] = '\0';
- expr = parse_expression (tmp);
+ expression_up expr = parse_expression (tmp);
if (expr->elts[0].opcode != UNOP_CAST)
error (_("Internal error in eval_type."));
return expr->elts[1].type;
projects / deliverable / binutils-gdb.git / blobdiff