/* Evaluate expressions for GDB.
- Copyright (C) 1986-2014 Free Software Foundation, Inc.
+ Copyright (C) 1986-2017 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 <string.h>
#include "symtab.h"
#include "gdbtypes.h"
#include "value.h"
#include "expression.h"
#include "target.h"
#include "frame.h"
+#include "gdbthread.h"
#include "language.h" /* For CAST_IS_CONVERSION. */
#include "f-lang.h" /* For array bound stuff. */
#include "cp-abi.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 "gdb_obstack.h"
#include "objfiles.h"
-#include "python/python.h"
-
-#include "gdb_assert.h"
-
+#include "typeprint.h"
#include <ctype.h>
/* This is defined in valops.c */
/* 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 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 *,
enum noside, int);
evaluate_subexp (struct type *expect_type, struct expression *exp,
int *pos, enum noside noside)
{
- return (*exp->language_defn->la_exp_desc->evaluate_exp)
+ struct cleanup *cleanups;
+ struct value *retval;
+ int cleanup_temps = 0;
+
+ if (*pos == 0 && target_has_execution
+ && exp->language_defn->la_language == language_cplus
+ && !thread_stack_temporaries_enabled_p (inferior_ptid))
+ {
+ cleanups = enable_thread_stack_temporaries (inferior_ptid);
+ cleanup_temps = 1;
+ }
+
+ retval = (*exp->language_defn->la_exp_desc->evaluate_exp)
(expect_type, exp, pos, noside);
+
+ if (cleanup_temps)
+ {
+ if (value_in_thread_stack_temporaries (retval, inferior_ptid))
+ retval = value_non_lval (retval);
+ do_cleanups (cleanups);
+ }
+
+ return retval;
}
\f
/* Parse the string EXP as a C expression, evaluate it,
CORE_ADDR
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;
+ expression_up expr = parse_expression (exp);
+
+ return value_as_address (evaluate_expression (expr.get ()));
}
/* Like parse_and_eval_address, but treats the value of the expression
LONGEST
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 (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)
struct value *
parse_to_comma_and_eval (const char **expp)
{
- struct expression *expr = parse_exp_1 (expp, 0, (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, (struct block *) 0, 1);
- val = evaluate_expression (expr);
- do_cleanups (old_chain);
- return val;
+ return evaluate_expression (expr.get ());
}
\f
/* Evaluate an expression in internal prefix form
int preserve_errors)
{
struct value *mark, *new_mark, *result;
- volatile struct gdb_exception ex;
*valp = NULL;
if (resultp)
mark = value_mark ();
result = NULL;
- TRY_CATCH (ex, RETURN_MASK_ALL)
+ TRY
{
result = evaluate_subexp (NULL_TYPE, exp, pc, EVAL_NORMAL);
}
- if (ex.reason < 0)
+ CATCH (ex, RETURN_MASK_ALL)
{
/* Ignore memory errors if we want watchpoints pointing at
inaccessible memory to still be created; otherwise, throw the
break;
}
}
+ END_CATCH
new_mark = value_mark ();
if (mark == new_mark)
*valp = result;
else
{
- volatile struct gdb_exception except;
- TRY_CATCH (except, RETURN_MASK_ERROR)
+ TRY
{
value_fetch_lazy (result);
*valp = result;
}
+ CATCH (except, RETURN_MASK_ERROR)
+ {
+ }
+ END_CATCH
}
}
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 expresions 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,
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;
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))
}
}
-/* Constructs a fake method with the given parameter types.
- This function is used by the parser to construct an "expected"
- type for method overload resolution. */
+/* 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; }
-static struct type *
-make_params (int num_types, struct type **param_types)
+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 = XZALLOC (struct type);
- TYPE_MAIN_TYPE (type) = XZALLOC (struct main_type);
+ struct type *type = &m_type;
+
+ TYPE_MAIN_TYPE (type) = &m_main_type;
TYPE_LENGTH (type) = 1;
TYPE_CODE (type) = TYPE_CODE_METHOD;
- TYPE_VPTR_FIELDNO (type) = -1;
TYPE_CHAIN (type) = type;
+ TYPE_INSTANCE_FLAGS (type) = flags;
if (num_types > 0)
{
if (param_types[num_types - 1] == NULL)
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 (except, RETURN_MASK_ERROR)
+ {
+ if (noside != EVAL_AVOID_SIDE_EFFECTS)
+ throw_exception (except);
+
+ ret = value_zero (SYMBOL_TYPE (var), not_lval);
+ }
+ END_CATCH
+
+ return ret;
+}
+
+/* Helper for evaluating an OP_VAR_MSYM_VALUE. */
+
+value *
+evaluate_var_msym_value (enum noside noside,
+ struct objfile *objfile, minimal_symbol *msymbol)
+{
+ if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ {
+ type *the_type = find_minsym_type_and_address (msymbol, objfile, NULL);
+ return value_zero (the_type, not_lval);
+ }
+ else
+ {
+ CORE_ADDR address;
+ type *the_type = find_minsym_type_and_address (msymbol, objfile, &address);
+ 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], nargs, argvec + 1);
+
+ 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)
+ {
+ type *return_type = TYPE_TARGET_TYPE (ftype);
+
+ if (return_type == NULL)
+ return_type = default_return_type;
- 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], nargs, argvec + 1);
+ default:
+ return call_function_by_hand (argvec[0], default_return_type,
+ nargs, argvec + 1);
+ }
+}
+
+/* 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 (except, RETURN_MASK_ERROR)
+ {
+ if (except.error == NOT_FOUND_ERROR)
+ break;
+ else
+ throw_exception (except);
+ }
+ END_CATCH
+
+ 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_TAG_NAME (type),
+ name,
+ get_selected_block (0),
+ VAR_DOMAIN).symbol;
+ if (function == NULL)
+ error (_("No symbol \"%s\" in namespace \"%s\"."),
+ name, TYPE_TAG_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)
+ {
+ symbol *sym = exp->elts[*pos + 2].symbol;
+ var_func_name = SYMBOL_PRINT_NAME (sym);
+ }
+ else if (op == OP_VAR_VALUE)
+ {
+ minimal_symbol *msym = exp->elts[*pos + 2].msymbol;
+ var_func_name = MSYMBOL_PRINT_NAME (msym);
+ }
+
+ 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 (&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 (&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 (&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);
}
struct value *
{
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;
int ix;
long mem_offset;
struct type **arg_types;
- int save_pos1;
- struct symbol *function = NULL;
- char *function_name = NULL;
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,
expect_type, 0, noside);
return value_from_longest (exp->elts[pc + 1].type,
exp->elts[pc + 2].longconst);
- case OP_DOUBLE:
+ case OP_FLOAT:
(*pos) += 3;
- return value_from_double (exp->elts[pc + 1].type,
- exp->elts[pc + 2].doubleconst);
-
- case OP_DECFLOAT:
- (*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;
if (noside == EVAL_SKIP)
- goto nosideret;
-
- /* 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. */
+ return eval_skip_value (exp);
{
- volatile struct gdb_exception except;
- struct value *ret = NULL;
+ symbol *var = exp->elts[pc + 2].symbol;
+ if (TYPE_CODE (SYMBOL_TYPE (var)) == TYPE_CODE_ERROR)
+ error_unknown_type (SYMBOL_PRINT_NAME (var));
- TRY_CATCH (except, RETURN_MASK_ERROR)
- {
- ret = value_of_variable (exp->elts[pc + 2].symbol,
- exp->elts[pc + 1].block);
- }
+ return evaluate_var_value (noside, exp->elts[pc + 1].block, var);
+ }
- 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);
- }
+ case OP_VAR_MSYM_VALUE:
+ {
+ (*pos) += 3;
- return ret;
+ 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 (msymbol));
+ 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;
return SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry (sym, frame);
}
+ 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);
+
+ {
+ value *func = evaluate_subexp_standard (NULL, exp, pos, noside);
+ CORE_ADDR addr = value_address (func);
+
+ const block *blk = block_for_pc (addr);
+ const char *var = &exp->elts[pc + 2].string;
+
+ struct block_symbol sym = lookup_symbol (var, blk, VAR_DOMAIN, NULL);
+
+ if (sym.symbol == NULL)
+ error (_("No symbol \"%s\" in specified context."), var);
+
+ return evaluate_var_value (noside, sym.block, sym.symbol);
+ }
+
case OP_LAST:
(*pos) += 2;
return
tem = longest_to_int (exp->elts[pc + 1].longconst);
(*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
if (noside == EVAL_SKIP)
- goto nosideret;
+ 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);
tem = longest_to_int (exp->elts[pc + 1].longconst);
(*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
if (noside == EVAL_SKIP)
- {
- goto nosideret;
- }
+ return eval_skip_value (exp);
return value_nsstring (exp->gdbarch, &exp->elts[pc + 2].string, tem + 1);
case OP_ARRAY:
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);
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);
- }
+ 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. */
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
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:
= 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);
}
(*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. */
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
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, 3, argvec + 1);
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, 3, argvec + 1);
}
if (value_as_long (ret) == 0)
error (_("Target does not respond to this message selector."));
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, 3, argvec + 1);
if (gnu_runtime)
{
argvec[0] = ret;
- ret = call_function_by_hand (argvec[0], 3, argvec + 1);
+ ret = call_function_by_hand (argvec[0], NULL, 3, argvec + 1);
}
/* ret should now be the selector. */
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))
}
if (noside == EVAL_SKIP)
- goto nosideret;
+ return eval_skip_value (exp);
if (noside == EVAL_AVOID_SIDE_EFFECTS)
{
deprecated_set_value_type (argvec[0],
lookup_pointer_type (lookup_function_type (value_type (argvec[0]))));
argvec[0]
- = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
+ = call_function_by_hand (argvec[0], NULL, nargs + 2, argvec + 1);
}
- ret = call_function_by_hand (argvec[0], nargs + 2, argvec + 1);
+ ret = call_function_by_hand (argvec[0], NULL, 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)
- {
- /* 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);
-
- type = check_typedef (value_type (arg1));
- if (TYPE_CODE (type) == TYPE_CODE_METHODPTR)
- {
- if (noside == EVAL_AVOID_SIDE_EFFECTS)
- arg1 = value_zero (TYPE_TARGET_TYPE (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 (type) == TYPE_CODE_MEMBERPTR)
- {
- struct type *type_ptr
- = lookup_pointer_type (TYPE_DOMAIN_TYPE (type));
- struct type *target_type_ptr
- = lookup_pointer_type (TYPE_TARGET_TYPE (type));
-
- /* Now, convert these values to an address. */
- arg2 = value_cast (type_ptr, arg2);
-
- 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 (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);
-
- /* 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))
- {
- volatile struct gdb_exception except;
- struct value *value = NULL;
- TRY_CATCH (except, RETURN_MASK_ERROR)
- {
- value = value_x_unop (arg2, op, noside);
- }
-
- if (except.reason < 0)
- {
- if (except.error == NOT_FOUND_ERROR)
- break;
- else
- throw_exception (except);
- }
- 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);
- 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_TAG_NAME (type),
- name,
- get_selected_block (0),
- VAR_DOMAIN);
- if (function == NULL)
- error (_("No symbol \"%s\" in namespace \"%s\"."),
- name, TYPE_TAG_NAME (type));
-
- tem = 1;
- }
- else
- {
- gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
- || TYPE_CODE (type) == TYPE_CODE_UNION);
- function_name = name;
-
- 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
- {
- argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside);
- 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. */
- 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 == 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 (&argvec[1], nargs, func_name,
- NON_METHOD, /* not method */
- NULL, NULL, /* pass NULL symbol since
- symbol is unknown */
- NULL, &symp, NULL, 0);
-
- /* 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. */
- 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 (&argvec[1], nargs, tstr,
- METHOD, /* method */
- &arg2, /* the object */
- NULL, &valp, NULL,
- &static_memfuncp, 0);
-
- 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 */
- }
-
- 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 (&argvec[1], nargs,
- NULL, /* no need for name */
- NON_METHOD, /* not method */
- NULL, function, /* the function */
- NULL, &symp, NULL, no_adl);
-
- 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. */
- }
-
- do_call_it:
-
- 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. */
-
- struct 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_GNU_IFUNC (ftype))
- return allocate_value (TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (ftype)));
- else if (TYPE_TARGET_TYPE (ftype))
- return allocate_value (TYPE_TARGET_TYPE (ftype));
- 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 (exp->gdbarch, exp->language_defn,
- argvec[0], nargs, argvec + 1);
-
- 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. */
+ return evaluate_funcall (expect_type, exp, pos, noside);
case OP_F77_UNDETERMINED_ARGLIST:
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;
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
{
for (; tem <= nargs; tem++)
argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
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"));
(*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)
- arg3 = value_zero (value_type (arg3), not_lval);
+ arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
return arg3;
case STRUCTOP_PTR:
(*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))
{
- volatile struct gdb_exception except;
struct value *value = NULL;
- TRY_CATCH (except, RETURN_MASK_ERROR)
+ TRY
{
value = value_x_unop (arg1, op, noside);
}
- if (except.reason < 0)
+ CATCH (except, RETURN_MASK_ERROR)
{
if (except.error == NOT_FOUND_ERROR)
break;
else
throw_exception (except);
}
+ END_CATCH
+
arg1 = value;
}
{
struct type *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))
+ && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
{
real_type = value_rtti_indirect_type (arg1, &full, &top,
&using_enc);
arg3 = value_struct_elt (&arg1, NULL, &exp->elts[pc + 2].string,
NULL, "structure pointer");
if (noside == EVAL_AVOID_SIDE_EFFECTS)
- arg3 = value_zero (value_type (arg3), not_lval);
+ arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3));
return arg3;
case STRUCTOP_MEMBER:
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_pointers (lookup_pointer_type (TYPE_DOMAIN_TYPE (type)),
+ arg1 = value_cast_pointers (lookup_pointer_type (TYPE_SELF_TYPE (type)),
arg1, 1);
mem_offset = value_as_long (arg2);
}
case TYPE_INSTANCE:
- nargs = longest_to_int (exp->elts[pc + 1].longconst);
- arg_types = (struct type **) alloca (nargs * sizeof (struct type *));
- for (ix = 0; ix < nargs; ++ix)
- arg_types[ix] = exp->elts[pc + 1 + ix + 1].type;
-
- expect_type = make_params (nargs, arg_types);
- *(pos) += 3 + nargs;
- arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
- xfree (TYPE_FIELDS (expect_type));
- xfree (TYPE_MAIN_TYPE (expect_type));
- xfree (expect_type);
- return arg1;
+ {
+ 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 expect_type (flags, nargs, arg_types);
+ *(pos) += 4 + nargs;
+ return evaluate_subexp_standard (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
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 (exp->language_defn, value_type (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 (exp->language_defn, value_type (arg1))
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
}
}
- case BINOP_RANGE:
- evaluate_subexp (NULL_TYPE, exp, pos, noside);
- 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 (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
else
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);
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. */
if (noside == EVAL_AVOID_SIDE_EFFECTS)
if (noside == EVAL_SKIP)
{
evaluate_subexp (NULL_TYPE, exp, pos, noside);
- goto nosideret;
+ return eval_skip_value (exp);
}
oldpos = *pos;
if (noside == EVAL_SKIP)
{
evaluate_subexp (NULL_TYPE, exp, pos, noside);
- goto nosideret;
+ 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
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
{
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_CAST:
(*pos) += 2;
type = exp->elts[pc + 1].type;
- 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 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);
- 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 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;
+ return eval_skip_value (exp);
return value_dynamic_cast (type, arg1);
case UNOP_REINTERPRET_CAST:
type = value_type (arg1);
arg1 = evaluate_subexp (type, exp, pos, noside);
if (noside == EVAL_SKIP)
- goto nosideret;
+ 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
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 (type, lval_memory);
else
return value_at_lazy (type, value_as_address (arg1));
- case UNOP_MEMVAL_TLS:
- (*pos) += 3;
- arg1 = evaluate_subexp (expect_type, exp, pos, noside);
- if (noside == EVAL_SKIP)
- goto nosideret;
- if (noside == EVAL_AVOID_SIDE_EFFECTS)
- return value_zero (exp->elts[pc + 2].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);
- }
-
case UNOP_PREINCREMENT:
arg1 = evaluate_subexp (expect_type, exp, pos, noside);
if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
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)
- {
- 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);
- }
+ return allocate_value (exp->elts[pc + 1].type);
else
error (_("Attempt to use a type name as an expression"));
if (noside == EVAL_SKIP)
{
evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
- goto nosideret;
+ return eval_skip_value (exp);
}
else if (noside == EVAL_AVOID_SIDE_EFFECTS)
{
{
struct type *type = value_type (result);
- if (TYPE_CODE (check_typedef (type)) != TYPE_CODE_REF)
+ if (!TYPE_IS_REFERENCE (type))
{
- type = lookup_reference_type (type);
+ type = lookup_lvalue_reference_type (type);
result = allocate_value (type);
}
}
"evaluate that kind of expression"));
}
-nosideret:
- return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
+ gdb_assert_not_reached ("missed return?");
}
\f
/* Evaluate a subexpression of EXP, at index *POS,
/* 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)
+ if (TYPE_IS_REFERENCE (SYMBOL_TYPE (var)))
goto default_case;
(*pos) += 4;
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);
{
struct type *type = check_typedef (value_type (x));
- 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))
/* 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 = check_typedef (value_type (val));
- return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type));
+ 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);
+ }
+ else
+ (*pos) += 4;
+ break;
+
+ case OP_VAR_MSYM_VALUE:
+ {
+ (*pos) += 4;
+
+ 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)
+ error_unknown_type (MSYMBOL_PRINT_NAME (msymbol));
+
+ 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 subcription to allow
+ side-effects. */
+ case BINOP_SUBSCRIPT:
+ if (noside == EVAL_NORMAL)
+ {
+ int pc = (*pos) + 1;
+
+ val = evaluate_subexp (NULL_TYPE, exp, &pc, 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_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 / binutils.git / blobdiff