/* Support routines for manipulating internal types for GDB.
- Copyright (C) 1992-2013 Free Software Foundation, Inc.
+ Copyright (C) 1992-2014 Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "gdb_string.h"
+#include <string.h>
#include "bfd.h"
#include "symtab.h"
#include "symfile.h"
#include "gdb_assert.h"
#include "hashtab.h"
#include "exceptions.h"
+#include "cp-support.h"
+#include "bcache.h"
+#include "dwarf2loc.h"
/* Initialize BADNESS constants. */
&floatformat_vax_d
};
const struct floatformat *floatformats_ibm_long_double[BFD_ENDIAN_UNKNOWN] = {
- &floatformat_ibm_long_double,
- &floatformat_ibm_long_double
+ &floatformat_ibm_long_double_big,
+ &floatformat_ibm_long_double_little
};
/* Should opaque types be resolved? */
/* Alloc the structure and start off with all fields zeroed. */
- type = XZALLOC (struct type);
- TYPE_MAIN_TYPE (type) = XZALLOC (struct main_type);
+ type = XCNEW (struct type);
+ TYPE_MAIN_TYPE (type) = XCNEW (struct main_type);
TYPE_OBJFILE_OWNED (type) = 0;
TYPE_OWNER (type).gdbarch = gdbarch;
return TYPE_OWNER (type).gdbarch;
}
+/* See gdbtypes.h. */
+
+struct type *
+get_target_type (struct type *type)
+{
+ if (type != NULL)
+ {
+ type = TYPE_TARGET_TYPE (type);
+ if (type != NULL)
+ type = check_typedef (type);
+ }
+
+ return type;
+}
+
/* Alloc a new type instance structure, fill it with some defaults,
and point it at OLDTYPE. Allocate the new type instance from the
same place as OLDTYPE. */
/* Allocate the structure. */
if (! TYPE_OBJFILE_OWNED (oldtype))
- type = XZALLOC (struct type);
+ type = XCNEW (struct type);
else
type = OBSTACK_ZALLOC (&TYPE_OBJFILE (oldtype)->objfile_obstack,
struct type);
Elements will be of type ELEMENT_TYPE, the indices will be of type
RANGE_TYPE.
+ If BIT_STRIDE is not zero, build a packed array type whose element
+ size is BIT_STRIDE. Otherwise, ignore this parameter.
+
FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
sure it is TYPE_CODE_UNDEF before we bash it into an array
type? */
struct type *
-create_array_type (struct type *result_type,
- struct type *element_type,
- struct type *range_type)
+create_array_type_with_stride (struct type *result_type,
+ struct type *element_type,
+ struct type *range_type,
+ unsigned int bit_stride)
{
LONGEST low_bound, high_bound;
In such cases, the array length should be zero. */
if (high_bound < low_bound)
TYPE_LENGTH (result_type) = 0;
+ else if (bit_stride > 0)
+ TYPE_LENGTH (result_type) =
+ (bit_stride * (high_bound - low_bound + 1) + 7) / 8;
else
TYPE_LENGTH (result_type) =
TYPE_LENGTH (element_type) * (high_bound - low_bound + 1);
(struct field *) TYPE_ZALLOC (result_type, sizeof (struct field));
TYPE_INDEX_TYPE (result_type) = range_type;
TYPE_VPTR_FIELDNO (result_type) = -1;
+ if (bit_stride > 0)
+ TYPE_FIELD_BITSIZE (result_type, 0) = bit_stride;
/* TYPE_FLAG_TARGET_STUB will take care of zero length arrays. */
if (TYPE_LENGTH (result_type) == 0)
return result_type;
}
+/* Same as create_array_type_with_stride but with no bit_stride
+ (BIT_STRIDE = 0), thus building an unpacked array. */
+
+struct type *
+create_array_type (struct type *result_type,
+ struct type *element_type,
+ struct type *range_type)
+{
+ return create_array_type_with_stride (result_type, element_type,
+ range_type, 0);
+}
+
struct type *
lookup_array_range_type (struct type *element_type,
LONGEST low_bound, LONGEST high_bound)
name = type_name_no_tag (saved_type);
objfile = TYPE_OBJFILE (saved_type);
error (_("Invalid anonymous type %s [in module %s], GCC PR debug/47510 bug?"),
- name ? name : "<anonymous>", objfile ? objfile->name : "<arch>");
+ name ? name : "<anonymous>",
+ objfile ? objfile_name (objfile) : "<arch>");
}
/* Lookup a typedef or primitive type named NAME, visible in lexical
If NAME is the name of a baseclass type, return that type. */
struct type *
-lookup_struct_elt_type (struct type *type, char *name, int noerr)
+lookup_struct_elt_type (struct type *type, const char *name, int noerr)
{
int i;
char *typename;
error (_("Type %s has no component named %s."), typename, name);
}
+/* Store in *MAX the largest number representable by unsigned integer type
+ TYPE. */
+
+void
+get_unsigned_type_max (struct type *type, ULONGEST *max)
+{
+ unsigned int n;
+
+ CHECK_TYPEDEF (type);
+ gdb_assert (TYPE_CODE (type) == TYPE_CODE_INT && TYPE_UNSIGNED (type));
+ gdb_assert (TYPE_LENGTH (type) <= sizeof (ULONGEST));
+
+ /* Written this way to avoid overflow. */
+ n = TYPE_LENGTH (type) * TARGET_CHAR_BIT;
+ *max = ((((ULONGEST) 1 << (n - 1)) - 1) << 1) | 1;
+}
+
+/* Store in *MIN, *MAX the smallest and largest numbers representable by
+ signed integer type TYPE. */
+
+void
+get_signed_type_minmax (struct type *type, LONGEST *min, LONGEST *max)
+{
+ unsigned int n;
+
+ CHECK_TYPEDEF (type);
+ gdb_assert (TYPE_CODE (type) == TYPE_CODE_INT && !TYPE_UNSIGNED (type));
+ gdb_assert (TYPE_LENGTH (type) <= sizeof (LONGEST));
+
+ n = TYPE_LENGTH (type) * TARGET_CHAR_BIT;
+ *min = -((ULONGEST) 1 << (n - 1));
+ *max = ((ULONGEST) 1 << (n - 1)) - 1;
+}
+
/* Lookup the vptr basetype/fieldno values for TYPE.
If found store vptr_basetype in *BASETYPEP if non-NULL, and return
vptr_fieldno. Also, if found and basetype is from the same objfile,
struct gdbarch *gdbarch = get_type_arch (type);
struct fn_field *f;
char *mangled_name = gdb_mangle_name (type, method_id, signature_id);
- char *demangled_name = cplus_demangle (mangled_name,
- DMGL_PARAMS | DMGL_ANSI);
+ char *demangled_name = gdb_demangle (mangled_name,
+ DMGL_PARAMS | DMGL_ANSI);
char *argtypetext, *p;
int depth = 0, argcount = 1;
struct field *argtypes;
/* Helper function to initialize the standard scalar types.
- If NAME is non-NULL, then we make a copy of the string pointed
- to by name in the objfile_obstack for that objfile, and initialize
- the type name to that copy. There are places (mipsread.c in particular),
- where init_type is called with a NULL value for NAME). */
+ If NAME is non-NULL, then it is used to initialize the type name.
+ Note that NAME is not copied; it is required to have a lifetime at
+ least as long as OBJFILE. */
struct type *
init_type (enum type_code code, int length, int flags,
- char *name, struct objfile *objfile)
+ const char *name, struct objfile *objfile)
{
struct type *type;
if (flags & TYPE_FLAG_GNU_IFUNC)
TYPE_GNU_IFUNC (type) = 1;
- if (name)
- TYPE_NAME (type) = obsavestring (name, strlen (name),
- &objfile->objfile_obstack);
+ TYPE_NAME (type) = name;
/* C++ fancies. */
if (a == b)
return 1;
+ /* Two function types are equal if their argument and return types
+ are equal. */
+ if (TYPE_CODE (a) == TYPE_CODE_FUNC)
+ {
+ int i;
+
+ if (TYPE_NFIELDS (a) != TYPE_NFIELDS (b))
+ return 0;
+
+ if (!types_equal (TYPE_TARGET_TYPE (a), TYPE_TARGET_TYPE (b)))
+ return 0;
+
+ for (i = 0; i < TYPE_NFIELDS (a); ++i)
+ if (!types_equal (TYPE_FIELD_TYPE (a, i), TYPE_FIELD_TYPE (b, i)))
+ return 0;
+
+ return 1;
+ }
+
return 0;
}
+\f
+/* Deep comparison of types. */
+
+/* An entry in the type-equality bcache. */
+
+typedef struct type_equality_entry
+{
+ struct type *type1, *type2;
+} type_equality_entry_d;
+
+DEF_VEC_O (type_equality_entry_d);
+
+/* A helper function to compare two strings. Returns 1 if they are
+ the same, 0 otherwise. Handles NULLs properly. */
+
+static int
+compare_maybe_null_strings (const char *s, const char *t)
+{
+ if (s == NULL && t != NULL)
+ return 0;
+ else if (s != NULL && t == NULL)
+ return 0;
+ else if (s == NULL && t== NULL)
+ return 1;
+ return strcmp (s, t) == 0;
+}
+
+/* A helper function for check_types_worklist that checks two types for
+ "deep" equality. Returns non-zero if the types are considered the
+ same, zero otherwise. */
+
+static int
+check_types_equal (struct type *type1, struct type *type2,
+ VEC (type_equality_entry_d) **worklist)
+{
+ CHECK_TYPEDEF (type1);
+ CHECK_TYPEDEF (type2);
+
+ if (type1 == type2)
+ return 1;
+
+ if (TYPE_CODE (type1) != TYPE_CODE (type2)
+ || TYPE_LENGTH (type1) != TYPE_LENGTH (type2)
+ || TYPE_UNSIGNED (type1) != TYPE_UNSIGNED (type2)
+ || TYPE_NOSIGN (type1) != TYPE_NOSIGN (type2)
+ || TYPE_VARARGS (type1) != TYPE_VARARGS (type2)
+ || TYPE_VECTOR (type1) != TYPE_VECTOR (type2)
+ || TYPE_NOTTEXT (type1) != TYPE_NOTTEXT (type2)
+ || TYPE_INSTANCE_FLAGS (type1) != TYPE_INSTANCE_FLAGS (type2)
+ || TYPE_NFIELDS (type1) != TYPE_NFIELDS (type2))
+ return 0;
+
+ if (!compare_maybe_null_strings (TYPE_TAG_NAME (type1),
+ TYPE_TAG_NAME (type2)))
+ return 0;
+ if (!compare_maybe_null_strings (TYPE_NAME (type1), TYPE_NAME (type2)))
+ return 0;
+
+ if (TYPE_CODE (type1) == TYPE_CODE_RANGE)
+ {
+ if (memcmp (TYPE_RANGE_DATA (type1), TYPE_RANGE_DATA (type2),
+ sizeof (*TYPE_RANGE_DATA (type1))) != 0)
+ return 0;
+ }
+ else
+ {
+ int i;
+
+ for (i = 0; i < TYPE_NFIELDS (type1); ++i)
+ {
+ const struct field *field1 = &TYPE_FIELD (type1, i);
+ const struct field *field2 = &TYPE_FIELD (type2, i);
+ struct type_equality_entry entry;
+
+ if (FIELD_ARTIFICIAL (*field1) != FIELD_ARTIFICIAL (*field2)
+ || FIELD_BITSIZE (*field1) != FIELD_BITSIZE (*field2)
+ || FIELD_LOC_KIND (*field1) != FIELD_LOC_KIND (*field2))
+ return 0;
+ if (!compare_maybe_null_strings (FIELD_NAME (*field1),
+ FIELD_NAME (*field2)))
+ return 0;
+ switch (FIELD_LOC_KIND (*field1))
+ {
+ case FIELD_LOC_KIND_BITPOS:
+ if (FIELD_BITPOS (*field1) != FIELD_BITPOS (*field2))
+ return 0;
+ break;
+ case FIELD_LOC_KIND_ENUMVAL:
+ if (FIELD_ENUMVAL (*field1) != FIELD_ENUMVAL (*field2))
+ return 0;
+ break;
+ case FIELD_LOC_KIND_PHYSADDR:
+ if (FIELD_STATIC_PHYSADDR (*field1)
+ != FIELD_STATIC_PHYSADDR (*field2))
+ return 0;
+ break;
+ case FIELD_LOC_KIND_PHYSNAME:
+ if (!compare_maybe_null_strings (FIELD_STATIC_PHYSNAME (*field1),
+ FIELD_STATIC_PHYSNAME (*field2)))
+ return 0;
+ break;
+ case FIELD_LOC_KIND_DWARF_BLOCK:
+ {
+ struct dwarf2_locexpr_baton *block1, *block2;
+
+ block1 = FIELD_DWARF_BLOCK (*field1);
+ block2 = FIELD_DWARF_BLOCK (*field2);
+ if (block1->per_cu != block2->per_cu
+ || block1->size != block2->size
+ || memcmp (block1->data, block2->data, block1->size) != 0)
+ return 0;
+ }
+ break;
+ default:
+ internal_error (__FILE__, __LINE__, _("Unsupported field kind "
+ "%d by check_types_equal"),
+ FIELD_LOC_KIND (*field1));
+ }
+
+ entry.type1 = FIELD_TYPE (*field1);
+ entry.type2 = FIELD_TYPE (*field2);
+ VEC_safe_push (type_equality_entry_d, *worklist, &entry);
+ }
+ }
+
+ if (TYPE_TARGET_TYPE (type1) != NULL)
+ {
+ struct type_equality_entry entry;
+
+ if (TYPE_TARGET_TYPE (type2) == NULL)
+ return 0;
+
+ entry.type1 = TYPE_TARGET_TYPE (type1);
+ entry.type2 = TYPE_TARGET_TYPE (type2);
+ VEC_safe_push (type_equality_entry_d, *worklist, &entry);
+ }
+ else if (TYPE_TARGET_TYPE (type2) != NULL)
+ return 0;
+
+ return 1;
+}
+
+/* Check types on a worklist for equality. Returns zero if any pair
+ is not equal, non-zero if they are all considered equal. */
+
+static int
+check_types_worklist (VEC (type_equality_entry_d) **worklist,
+ struct bcache *cache)
+{
+ while (!VEC_empty (type_equality_entry_d, *worklist))
+ {
+ struct type_equality_entry entry;
+ int added;
+
+ entry = *VEC_last (type_equality_entry_d, *worklist);
+ VEC_pop (type_equality_entry_d, *worklist);
+
+ /* If the type pair has already been visited, we know it is
+ ok. */
+ bcache_full (&entry, sizeof (entry), cache, &added);
+ if (!added)
+ continue;
+
+ if (check_types_equal (entry.type1, entry.type2, worklist) == 0)
+ return 0;
+ }
+
+ return 1;
+}
+/* Return non-zero if types TYPE1 and TYPE2 are equal, as determined by a
+ "deep comparison". Otherwise return zero. */
+
+int
+types_deeply_equal (struct type *type1, struct type *type2)
+{
+ volatile struct gdb_exception except;
+ int result = 0;
+ struct bcache *cache;
+ VEC (type_equality_entry_d) *worklist = NULL;
+ struct type_equality_entry entry;
+
+ gdb_assert (type1 != NULL && type2 != NULL);
+
+ /* Early exit for the simple case. */
+ if (type1 == type2)
+ return 1;
+
+ cache = bcache_xmalloc (NULL, NULL);
+
+ entry.type1 = type1;
+ entry.type2 = type2;
+ VEC_safe_push (type_equality_entry_d, worklist, &entry);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ result = check_types_worklist (&worklist, cache);
+ }
+ /* check_types_worklist calls several nested helper functions,
+ some of which can raise a GDB Exception, so we just check
+ and rethrow here. If there is a GDB exception, a comparison
+ is not capable (or trusted), so exit. */
+ bcache_xfree (cache);
+ VEC_free (type_equality_entry_d, worklist);
+ /* Rethrow if there was a problem. */
+ if (except.reason < 0)
+ throw_exception (except);
+
+ return result;
+}
+\f
/* Compare one type (PARM) for compatibility with another (ARG).
* PARM is intended to be the parameter type of a function; and
* ARG is the supplied argument's type. This function tests if
int i, nfields;
nfields = TYPE_NFIELDS (type);
- TYPE_FIELDS (new_type) = XCALLOC (nfields, struct field);
+ TYPE_FIELDS (new_type) = XCNEWVEC (struct field, nfields);
for (i = 0; i < nfields; i++)
{
TYPE_FIELD_ARTIFICIAL (new_type, i) =
"<thread local variable, no debug info>", objfile);
/* NOTE: on some targets, addresses and pointers are not necessarily
- the same --- for example, on the D10V, pointers are 16 bits long,
- but addresses are 32 bits long. See doc/gdbint.texinfo,
- ``Pointers Are Not Always Addresses''.
+ the same.
The upshot is:
- gdb's `struct type' always describes the target's
can access any memory on the target, even if the processor has
separate code and data address spaces.
- So, for example:
- - If v is a value holding a D10V code pointer, its contents are
- in target form: a big-endian address left-shifted two bits.
- - If p is a D10V pointer type, TYPE_LENGTH (p) == 2, just as
- sizeof (void *) == 2 on the target.
-
In this context, objfile_type->builtin_core_addr is a bit odd:
it's a target type for a value the target will never see. It's
only used to hold the values of (typeless) linker symbols, which
projects / deliverable / binutils-gdb.git / blobdiff