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binutils-gdb/gdb/jv-lang.c
Andrew Cagney c65ecaf37b Fix -Werror -Wuninitialized warnings.
2001-03-23 22:48:44 +00:00

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/* Java language support routines for GDB, the GNU debugger.
Copyright 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "parser-defs.h"
#include "language.h"
#include "gdbtypes.h"
#include "symtab.h"
#include "symfile.h"
#include "objfiles.h"
#include "gdb_string.h"
#include "value.h"
#include "c-lang.h"
#include "jv-lang.h"
#include "gdbcore.h"
#include <ctype.h>
struct type *java_int_type;
struct type *java_byte_type;
struct type *java_short_type;
struct type *java_long_type;
struct type *java_boolean_type;
struct type *java_char_type;
struct type *java_float_type;
struct type *java_double_type;
struct type *java_void_type;
/* Local functions */
extern void _initialize_java_language (void);
static int java_demangled_signature_length (char *);
static void java_demangled_signature_copy (char *, char *);
static struct symtab *get_java_class_symtab (void);
static char *get_java_utf8_name (struct obstack *obstack, value_ptr name);
static int java_class_is_primitive (value_ptr clas);
static struct type *java_lookup_type (char *signature);
static value_ptr java_value_string (char *ptr, int len);
static void java_emit_char (int c, struct ui_file * stream, int quoter);
/* This objfile contains symtabs that have been dynamically created
to record dynamically loaded Java classes and dynamically
compiled java methods. */
static struct objfile *dynamics_objfile = NULL;
static struct type *java_link_class_type (struct type *, value_ptr);
static struct objfile *
get_dynamics_objfile (void)
{
if (dynamics_objfile == NULL)
{
dynamics_objfile = allocate_objfile (NULL, 0);
}
return dynamics_objfile;
}
#if 1
/* symtab contains classes read from the inferior. */
static struct symtab *class_symtab = NULL;
/* Maximum number of class in class_symtab before relocation is needed. */
static int class_symtab_space;
static struct symtab *
get_java_class_symtab (void)
{
if (class_symtab == NULL)
{
struct objfile *objfile = get_dynamics_objfile ();
struct blockvector *bv;
struct block *bl;
class_symtab = allocate_symtab ("<java-classes>", objfile);
class_symtab->language = language_java;
bv = (struct blockvector *)
obstack_alloc (&objfile->symbol_obstack, sizeof (struct blockvector));
BLOCKVECTOR_NBLOCKS (bv) = 1;
BLOCKVECTOR (class_symtab) = bv;
/* Allocate dummy STATIC_BLOCK. */
bl = (struct block *)
obstack_alloc (&objfile->symbol_obstack, sizeof (struct block));
BLOCK_NSYMS (bl) = 0;
BLOCK_START (bl) = 0;
BLOCK_END (bl) = 0;
BLOCK_FUNCTION (bl) = NULL;
BLOCK_SUPERBLOCK (bl) = NULL;
BLOCK_GCC_COMPILED (bl) = 0;
BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;
/* Allocate GLOBAL_BLOCK. This has to be relocatable. */
class_symtab_space = 128;
bl = (struct block *)
mmalloc (objfile->md,
sizeof (struct block)
+ ((class_symtab_space - 1) * sizeof (struct symbol *)));
*bl = *BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
class_symtab->free_ptr = (char *) bl;
}
return class_symtab;
}
static void
add_class_symtab_symbol (struct symbol *sym)
{
struct symtab *symtab = get_java_class_symtab ();
struct blockvector *bv = BLOCKVECTOR (symtab);
struct block *bl = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
if (BLOCK_NSYMS (bl) >= class_symtab_space)
{
/* Need to re-allocate. */
class_symtab_space *= 2;
bl = (struct block *)
mrealloc (symtab->objfile->md, bl,
sizeof (struct block)
+ ((class_symtab_space - 1) * sizeof (struct symbol *)));
class_symtab->free_ptr = (char *) bl;
BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
}
BLOCK_SYM (bl, BLOCK_NSYMS (bl)) = sym;
BLOCK_NSYMS (bl) = BLOCK_NSYMS (bl) + 1;
}
static struct symbol *add_class_symbol (struct type *type, CORE_ADDR addr);
static struct symbol *
add_class_symbol (struct type *type, CORE_ADDR addr)
{
struct symbol *sym;
sym = (struct symbol *)
obstack_alloc (&dynamics_objfile->symbol_obstack, sizeof (struct symbol));
memset (sym, 0, sizeof (struct symbol));
SYMBOL_LANGUAGE (sym) = language_java;
SYMBOL_NAME (sym) = TYPE_TAG_NAME (type);
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
/* SYMBOL_VALUE (sym) = valu; */
SYMBOL_TYPE (sym) = type;
SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
SYMBOL_VALUE_ADDRESS (sym) = addr;
return sym;
}
#endif
struct type *
java_lookup_class (char *name)
{
struct symbol *sym;
sym = lookup_symbol (name, expression_context_block, STRUCT_NAMESPACE,
(int *) 0, (struct symtab **) NULL);
if (sym != NULL)
return SYMBOL_TYPE (sym);
#if 0
CORE_ADDR addr;
if (called from parser)
{
call lookup_class (or similar) in inferior;
if not
found:
return NULL;
addr = found in inferior;
}
else
addr = 0;
struct type *type;
type = alloc_type (objfile);
TYPE_CODE (type) = TYPE_CODE_STRUCT;
INIT_CPLUS_SPECIFIC (type);
TYPE_TAG_NAME (type) = obsavestring (name, strlen (name), &objfile->type_obstack);
TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
TYPE ? = addr;
return type;
#else
/* FIXME - should search inferior's symbol table. */
return NULL;
#endif
}
/* Return a nul-terminated string (allocated on OBSTACK) for
a name given by NAME (which has type Utf8Const*). */
char *
get_java_utf8_name (struct obstack *obstack, value_ptr name)
{
char *chrs;
value_ptr temp = name;
int name_length;
CORE_ADDR data_addr;
temp = value_struct_elt (&temp, NULL, "length", NULL, "structure");
name_length = (int) value_as_long (temp);
data_addr = VALUE_ADDRESS (temp) + VALUE_OFFSET (temp)
+ TYPE_LENGTH (VALUE_TYPE (temp));
chrs = obstack_alloc (obstack, name_length + 1);
chrs[name_length] = '\0';
read_memory (data_addr, chrs, name_length);
return chrs;
}
value_ptr
java_class_from_object (value_ptr obj_val)
{
/* This is all rather inefficient, since the offsets of vtable and
class are fixed. FIXME */
value_ptr vtable_val;
if (TYPE_CODE (VALUE_TYPE (obj_val)) == TYPE_CODE_PTR
&& TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (obj_val))) == 0)
obj_val = value_at (get_java_object_type (),
value_as_pointer (obj_val), NULL);
vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure");
return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure");
}
/* Check if CLASS_IS_PRIMITIVE(value of clas): */
static int
java_class_is_primitive (value_ptr clas)
{
value_ptr vtable = value_struct_elt (&clas, NULL, "vtable", NULL, "struct");
CORE_ADDR i = value_as_pointer (vtable);
return (int) (i & 0x7fffffff) == (int) 0x7fffffff;
}
/* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */
struct type *
type_from_class (value_ptr clas)
{
struct type *type;
char *name;
value_ptr temp;
struct objfile *objfile;
value_ptr utf8_name;
char *nptr;
CORE_ADDR addr;
struct block *bl;
int i;
int is_array = 0;
type = check_typedef (VALUE_TYPE (clas));
if (TYPE_CODE (type) == TYPE_CODE_PTR)
{
if (value_logical_not (clas))
return NULL;
clas = value_ind (clas);
}
addr = VALUE_ADDRESS (clas) + VALUE_OFFSET (clas);
#if 0
get_java_class_symtab ();
bl = BLOCKVECTOR_BLOCK (BLOCKVECTOR (class_symtab), GLOBAL_BLOCK);
for (i = BLOCK_NSYMS (bl); --i >= 0;)
{
struct symbol *sym = BLOCK_SYM (bl, i);
if (SYMBOL_VALUE_ADDRESS (sym) == addr)
return SYMBOL_TYPE (sym);
}
#endif
objfile = get_dynamics_objfile ();
if (java_class_is_primitive (clas))
{
value_ptr sig;
temp = clas;
sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure");
return java_primitive_type (value_as_long (sig));
}
/* Get Class name. */
/* if clasloader non-null, prepend loader address. FIXME */
temp = clas;
utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure");
name = get_java_utf8_name (&objfile->type_obstack, utf8_name);
for (nptr = name; *nptr != 0; nptr++)
{
if (*nptr == '/')
*nptr = '.';
}
type = java_lookup_class (name);
if (type != NULL)
return type;
type = alloc_type (objfile);
TYPE_CODE (type) = TYPE_CODE_STRUCT;
INIT_CPLUS_SPECIFIC (type);
if (name[0] == '[')
{
char *signature = name;
int namelen = java_demangled_signature_length (signature);
if (namelen > strlen (name))
name = obstack_alloc (&objfile->type_obstack, namelen + 1);
java_demangled_signature_copy (name, signature);
name[namelen] = '\0';
is_array = 1;
temp = clas;
/* Set array element type. */
temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
VALUE_TYPE (temp) = lookup_pointer_type (VALUE_TYPE (clas));
TYPE_TARGET_TYPE (type) = type_from_class (temp);
}
ALLOCATE_CPLUS_STRUCT_TYPE (type);
TYPE_TAG_NAME (type) = name;
add_class_symtab_symbol (add_class_symbol (type, addr));
return java_link_class_type (type, clas);
}
/* Fill in class TYPE with data from the CLAS value. */
struct type *
java_link_class_type (struct type *type, value_ptr clas)
{
value_ptr temp;
char *unqualified_name;
char *name = TYPE_TAG_NAME (type);
int ninterfaces, nfields, nmethods;
int type_is_object = 0;
struct fn_field *fn_fields;
struct fn_fieldlist *fn_fieldlists;
value_ptr fields, methods;
struct value *method = NULL;
struct value *field = NULL;
int i, j;
struct objfile *objfile = get_dynamics_objfile ();
struct type *tsuper;
unqualified_name = strrchr (name, '.');
if (unqualified_name == NULL)
unqualified_name = name;
temp = clas;
temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure");
if (name != NULL && strcmp (name, "java.lang.Object") == 0)
{
tsuper = get_java_object_type ();
if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR)
tsuper = TYPE_TARGET_TYPE (tsuper);
type_is_object = 1;
}
else
tsuper = type_from_class (temp);
#if 1
ninterfaces = 0;
#else
temp = clas;
ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len", NULL, "structure"));
#endif
TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces;
temp = clas;
nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count", NULL, "structure"));
nfields += TYPE_N_BASECLASSES (type);
nfields++; /* Add one for dummy "class" field. */
TYPE_NFIELDS (type) = nfields;
TYPE_FIELDS (type) = (struct field *)
TYPE_ALLOC (type, sizeof (struct field) * nfields);
memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
TYPE_FIELD_PRIVATE_BITS (type) =
(B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
TYPE_FIELD_PROTECTED_BITS (type) =
(B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
TYPE_FIELD_IGNORE_BITS (type) =
(B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
if (tsuper != NULL)
{
TYPE_BASECLASS (type, 0) = tsuper;
if (type_is_object)
SET_TYPE_FIELD_PRIVATE (type, 0);
}
i = strlen (name);
if (i > 2 && name[i - 1] == ']' && tsuper != NULL)
{
/* FIXME */
TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4; /* size with "length" */
}
else
{
temp = clas;
temp = value_struct_elt (&temp, NULL, "size_in_bytes", NULL, "structure");
TYPE_LENGTH (type) = value_as_long (temp);
}
fields = NULL;
nfields--; /* First set up dummy "class" field. */
SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields),
VALUE_ADDRESS (clas) + VALUE_OFFSET (clas));
TYPE_FIELD_NAME (type, nfields) = "class";
TYPE_FIELD_TYPE (type, nfields) = VALUE_TYPE (clas);
SET_TYPE_FIELD_PRIVATE (type, nfields);
for (i = TYPE_N_BASECLASSES (type); i < nfields; i++)
{
int accflags;
int boffset;
if (fields == NULL)
{
temp = clas;
fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure");
field = value_ind (fields);
}
else
{ /* Re-use field value for next field. */
VALUE_ADDRESS (field) += TYPE_LENGTH (VALUE_TYPE (field));
VALUE_LAZY (field) = 1;
}
temp = field;
temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
TYPE_FIELD_NAME (type, i) =
get_java_utf8_name (&objfile->type_obstack, temp);
temp = field;
accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags",
NULL, "structure"));
temp = field;
temp = value_struct_elt (&temp, NULL, "info", NULL, "structure");
boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset",
NULL, "structure"));
if (accflags & 0x0001) /* public access */
{
/* ??? */
}
if (accflags & 0x0002) /* private access */
{
SET_TYPE_FIELD_PRIVATE (type, i);
}
if (accflags & 0x0004) /* protected access */
{
SET_TYPE_FIELD_PROTECTED (type, i);
}
if (accflags & 0x0008) /* ACC_STATIC */
SET_FIELD_PHYSADDR (TYPE_FIELD (type, i), boffset);
else
TYPE_FIELD_BITPOS (type, i) = 8 * boffset;
if (accflags & 0x8000) /* FIELD_UNRESOLVED_FLAG */
{
TYPE_FIELD_TYPE (type, i) = get_java_object_type (); /* FIXME */
}
else
{
struct type *ftype;
temp = field;
temp = value_struct_elt (&temp, NULL, "type", NULL, "structure");
ftype = type_from_class (temp);
if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT)
ftype = lookup_pointer_type (ftype);
TYPE_FIELD_TYPE (type, i) = ftype;
}
}
temp = clas;
nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count",
NULL, "structure"));
TYPE_NFN_FIELDS_TOTAL (type) = nmethods;
j = nmethods * sizeof (struct fn_field);
fn_fields = (struct fn_field *)
obstack_alloc (&dynamics_objfile->symbol_obstack, j);
memset (fn_fields, 0, j);
fn_fieldlists = (struct fn_fieldlist *)
alloca (nmethods * sizeof (struct fn_fieldlist));
methods = NULL;
for (i = 0; i < nmethods; i++)
{
char *mname;
int k;
if (methods == NULL)
{
temp = clas;
methods = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
method = value_ind (methods);
}
else
{ /* Re-use method value for next method. */
VALUE_ADDRESS (method) += TYPE_LENGTH (VALUE_TYPE (method));
VALUE_LAZY (method) = 1;
}
/* Get method name. */
temp = method;
temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
mname = get_java_utf8_name (&objfile->type_obstack, temp);
if (strcmp (mname, "<init>") == 0)
mname = unqualified_name;
/* Check for an existing method with the same name.
* This makes building the fn_fieldslists an O(nmethods**2)
* operation. That could be using hashing, but I doubt it
* is worth it. Note that we do maintain the order of methods
* in the inferior's Method table (as long as that is grouped
* by method name), which I think is desirable. --PB */
for (k = 0, j = TYPE_NFN_FIELDS (type);;)
{
if (--j < 0)
{ /* No match - new method name. */
j = TYPE_NFN_FIELDS (type)++;
fn_fieldlists[j].name = mname;
fn_fieldlists[j].length = 1;
fn_fieldlists[j].fn_fields = &fn_fields[i];
k = i;
break;
}
if (strcmp (mname, fn_fieldlists[j].name) == 0)
{ /* Found an existing method with the same name. */
int l;
if (mname != unqualified_name)
obstack_free (&objfile->type_obstack, mname);
mname = fn_fieldlists[j].name;
fn_fieldlists[j].length++;
k = i - k; /* Index of new slot. */
/* Shift intervening fn_fields (between k and i) down. */
for (l = i; l > k; l--)
fn_fields[l] = fn_fields[l - 1];
for (l = TYPE_NFN_FIELDS (type); --l > j;)
fn_fieldlists[l].fn_fields++;
break;
}
k += fn_fieldlists[j].length;
}
fn_fields[k].physname = "";
fn_fields[k].is_stub = 1;
fn_fields[k].type = make_function_type (java_void_type, NULL); /* FIXME */
TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD;
}
j = TYPE_NFN_FIELDS (type) * sizeof (struct fn_fieldlist);
TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
obstack_alloc (&dynamics_objfile->symbol_obstack, j);
memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j);
return type;
}
static struct type *java_object_type;
struct type *
get_java_object_type (void)
{
if (java_object_type == NULL)
{
struct symbol *sym;
sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_NAMESPACE,
(int *) 0, (struct symtab **) NULL);
if (sym == NULL)
error ("cannot find java.lang.Object");
java_object_type = SYMBOL_TYPE (sym);
}
return java_object_type;
}
int
get_java_object_header_size (void)
{
struct type *objtype = get_java_object_type ();
if (objtype == NULL)
return (2 * TARGET_PTR_BIT / TARGET_CHAR_BIT);
else
return TYPE_LENGTH (objtype);
}
int
is_object_type (struct type *type)
{
CHECK_TYPEDEF (type);
if (TYPE_CODE (type) == TYPE_CODE_PTR)
{
struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type));
char *name;
if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT)
return 0;
while (TYPE_N_BASECLASSES (ttype) > 0)
ttype = TYPE_BASECLASS (ttype, 0);
name = TYPE_TAG_NAME (ttype);
if (name != NULL && strcmp (name, "java.lang.Object") == 0)
return 1;
name = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char *) 0;
if (name != NULL && strcmp (name, "vtable") == 0)
{
if (java_object_type == NULL)
java_object_type = type;
return 1;
}
}
return 0;
}
struct type *
java_primitive_type (int signature)
{
switch (signature)
{
case 'B':
return java_byte_type;
case 'S':
return java_short_type;
case 'I':
return java_int_type;
case 'J':
return java_long_type;
case 'Z':
return java_boolean_type;
case 'C':
return java_char_type;
case 'F':
return java_float_type;
case 'D':
return java_double_type;
case 'V':
return java_void_type;
}
error ("unknown signature '%c' for primitive type", (char) signature);
}
/* If name[0 .. namelen-1] is the name of a primitive Java type,
return that type. Otherwise, return NULL. */
struct type *
java_primitive_type_from_name (char *name, int namelen)
{
switch (name[0])
{
case 'b':
if (namelen == 4 && memcmp (name, "byte", 4) == 0)
return java_byte_type;
if (namelen == 7 && memcmp (name, "boolean", 7) == 0)
return java_boolean_type;
break;
case 'c':
if (namelen == 4 && memcmp (name, "char", 4) == 0)
return java_char_type;
case 'd':
if (namelen == 6 && memcmp (name, "double", 6) == 0)
return java_double_type;
break;
case 'f':
if (namelen == 5 && memcmp (name, "float", 5) == 0)
return java_float_type;
break;
case 'i':
if (namelen == 3 && memcmp (name, "int", 3) == 0)
return java_int_type;
break;
case 'l':
if (namelen == 4 && memcmp (name, "long", 4) == 0)
return java_long_type;
break;
case 's':
if (namelen == 5 && memcmp (name, "short", 5) == 0)
return java_short_type;
break;
case 'v':
if (namelen == 4 && memcmp (name, "void", 4) == 0)
return java_void_type;
break;
}
return NULL;
}
/* Return the length (in bytes) of demangled name of the Java type
signature string SIGNATURE. */
static int
java_demangled_signature_length (char *signature)
{
int array = 0;
for (; *signature == '['; signature++)
array += 2; /* Two chars for "[]". */
switch (signature[0])
{
case 'L':
/* Subtract 2 for 'L' and ';'. */
return strlen (signature) - 2 + array;
default:
return strlen (TYPE_NAME (java_primitive_type (signature[0]))) + array;
}
}
/* Demangle the Java type signature SIGNATURE, leaving the result in RESULT. */
static void
java_demangled_signature_copy (char *result, char *signature)
{
int array = 0;
char *ptr;
int i;
while (*signature == '[')
{
array++;
signature++;
}
switch (signature[0])
{
case 'L':
/* Subtract 2 for 'L' and ';', but add 1 for final nul. */
signature++;
ptr = result;
for (; *signature != ';' && *signature != '\0'; signature++)
{
if (*signature == '/')
*ptr++ = '.';
else
*ptr++ = *signature;
}
break;
default:
ptr = TYPE_NAME (java_primitive_type (signature[0]));
i = strlen (ptr);
strcpy (result, ptr);
ptr = result + i;
break;
}
while (--array >= 0)
{
*ptr++ = '[';
*ptr++ = ']';
}
}
/* Return the demangled name of the Java type signature string SIGNATURE,
as a freshly allocated copy. */
char *
java_demangle_type_signature (char *signature)
{
int length = java_demangled_signature_length (signature);
char *result = xmalloc (length + 1);
java_demangled_signature_copy (result, signature);
result[length] = '\0';
return result;
}
struct type *
java_lookup_type (char *signature)
{
switch (signature[0])
{
case 'L':
case '[':
error ("java_lookup_type not fully implemented");
default:
return java_primitive_type (signature[0]);
}
}
/* Return the type of TYPE followed by DIMS pairs of [ ].
If DIMS == 0, TYPE is returned. */
struct type *
java_array_type (struct type *type, int dims)
{
struct type *range_type;
while (dims-- > 0)
{
range_type = create_range_type (NULL, builtin_type_int, 0, 0);
/* FIXME This is bogus! Java arrays are not gdb arrays! */
type = create_array_type (NULL, type, range_type);
}
return type;
}
/* Create a Java string in the inferior from a (Utf8) literal. */
static value_ptr
java_value_string (char *ptr, int len)
{
error ("not implemented - java_value_string"); /* FIXME */
}
/* Print the character C on STREAM as part of the contents of a literal
string whose delimiter is QUOTER. Note that that format for printing
characters and strings is language specific. */
static void
java_emit_char (int c, struct ui_file *stream, int quoter)
{
switch (c)
{
case '\\':
case '\'':
fprintf_filtered (stream, "\\%c", c);
break;
case '\b':
fputs_filtered ("\\b", stream);
break;
case '\t':
fputs_filtered ("\\t", stream);
break;
case '\n':
fputs_filtered ("\\n", stream);
break;
case '\f':
fputs_filtered ("\\f", stream);
break;
case '\r':
fputs_filtered ("\\r", stream);
break;
default:
if (isprint (c))
fputc_filtered (c, stream);
else
fprintf_filtered (stream, "\\u%.4x", (unsigned int) c);
break;
}
}
static value_ptr
evaluate_subexp_java (struct type *expect_type, register struct expression *exp,
register int *pos, enum noside noside)
{
int pc = *pos;
int i;
char *name;
enum exp_opcode op = exp->elts[*pos].opcode;
value_ptr arg1, arg2;
struct type *type;
switch (op)
{
case UNOP_IND:
if (noside == EVAL_SKIP)
goto standard;
(*pos)++;
arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL);
if (is_object_type (VALUE_TYPE (arg1)))
{
struct type *type;
type = type_from_class (java_class_from_object (arg1));
arg1 = value_cast (lookup_pointer_type (type), arg1);
}
if (noside == EVAL_SKIP)
goto nosideret;
return value_ind (arg1);
case BINOP_SUBSCRIPT:
(*pos)++;
arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
if (noside == EVAL_SKIP)
goto nosideret;
/* 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. */
COERCE_REF (arg1);
type = check_typedef (VALUE_TYPE (arg1));
if (TYPE_CODE (type) == TYPE_CODE_PTR)
type = check_typedef (TYPE_TARGET_TYPE (type));
name = TYPE_NAME (type);
if (name == NULL)
name = TYPE_TAG_NAME (type);
i = name == NULL ? 0 : strlen (name);
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
&& i > 2 && name[i - 1] == ']')
{
CORE_ADDR address;
long length, index;
struct type *el_type;
char buf4[4];
value_ptr clas = java_class_from_object (arg1);
value_ptr temp = clas;
/* Get CLASS_ELEMENT_TYPE of the array type. */
temp = value_struct_elt (&temp, NULL, "methods",
NULL, "structure");
VALUE_TYPE (temp) = VALUE_TYPE (clas);
el_type = type_from_class (temp);
if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT)
el_type = lookup_pointer_type (el_type);
if (noside == EVAL_AVOID_SIDE_EFFECTS)
return value_zero (el_type, VALUE_LVAL (arg1));
address = value_as_pointer (arg1);
address += JAVA_OBJECT_SIZE;
read_memory (address, buf4, 4);
length = (long) extract_signed_integer (buf4, 4);
index = (long) value_as_long (arg2);
if (index >= length || index < 0)
error ("array index (%ld) out of bounds (length: %ld)",
index, length);
address = (address + 4) + index * TYPE_LENGTH (el_type);
return value_at (el_type, address, NULL);
}
else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
{
if (noside == EVAL_AVOID_SIDE_EFFECTS)
return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
else
return value_subscript (arg1, arg2);
}
if (name)
error ("cannot subscript something of type `%s'", name);
else
error ("cannot subscript requested type");
case OP_STRING:
(*pos)++;
i = longest_to_int (exp->elts[pc + 1].longconst);
(*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1);
if (noside == EVAL_SKIP)
goto nosideret;
return java_value_string (&exp->elts[pc + 2].string, i);
case STRUCTOP_STRUCT:
arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
/* Convert object field (such as TYPE.class) to reference. */
if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT)
arg1 = value_addr (arg1);
return arg1;
default:
break;
}
standard:
return evaluate_subexp_standard (expect_type, exp, pos, noside);
nosideret:
return value_from_longest (builtin_type_long, (LONGEST) 1);
}
static struct type *
java_create_fundamental_type (struct objfile *objfile, int typeid)
{
switch (typeid)
{
case FT_VOID:
return java_void_type;
case FT_BOOLEAN:
return java_boolean_type;
case FT_CHAR:
return java_char_type;
case FT_FLOAT:
return java_float_type;
case FT_DBL_PREC_FLOAT:
return java_double_type;
case FT_BYTE:
case FT_SIGNED_CHAR:
return java_byte_type;
case FT_SHORT:
case FT_SIGNED_SHORT:
return java_short_type;
case FT_INTEGER:
case FT_SIGNED_INTEGER:
return java_int_type;
case FT_LONG:
case FT_SIGNED_LONG:
return java_long_type;
}
return c_create_fundamental_type (objfile, typeid);
}
/* Table mapping opcodes into strings for printing operators
and precedences of the operators. */
const struct op_print java_op_print_tab[] =
{
{",", BINOP_COMMA, PREC_COMMA, 0},
{"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
{"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
{"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
{"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
{"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
{"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
{"==", BINOP_EQUAL, PREC_EQUAL, 0},
{"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
{"<=", BINOP_LEQ, PREC_ORDER, 0},
{">=", BINOP_GEQ, PREC_ORDER, 0},
{">", BINOP_GTR, PREC_ORDER, 0},
{"<", BINOP_LESS, PREC_ORDER, 0},
{">>", BINOP_RSH, PREC_SHIFT, 0},
{"<<", BINOP_LSH, PREC_SHIFT, 0},
#if 0
{">>>", BINOP_ ? ? ?, PREC_SHIFT, 0},
#endif
{"+", BINOP_ADD, PREC_ADD, 0},
{"-", BINOP_SUB, PREC_ADD, 0},
{"*", BINOP_MUL, PREC_MUL, 0},
{"/", BINOP_DIV, PREC_MUL, 0},
{"%", BINOP_REM, PREC_MUL, 0},
{"-", UNOP_NEG, PREC_PREFIX, 0},
{"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
{"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
{"*", UNOP_IND, PREC_PREFIX, 0},
#if 0
{"instanceof", ? ? ?, ? ? ?, 0},
#endif
{"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
{"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
{NULL, 0, 0, 0}
};
const struct language_defn java_language_defn =
{
"java", /* Language name */
language_java,
c_builtin_types,
range_check_off,
type_check_off,
case_sensitive_on,
java_parse,
java_error,
evaluate_subexp_java,
c_printchar, /* Print a character constant */
c_printstr, /* Function to print string constant */
java_emit_char, /* Function to print a single character */
java_create_fundamental_type, /* Create fundamental type in this language */
java_print_type, /* Print a type using appropriate syntax */
java_val_print, /* Print a value using appropriate syntax */
java_value_print, /* Print a top-level value */
{"", "", "", ""}, /* Binary format info */
{"0%lo", "0", "o", ""}, /* Octal format info */
{"%ld", "", "d", ""}, /* Decimal format info */
{"0x%lx", "0x", "x", ""}, /* Hex format info */
java_op_print_tab, /* expression operators for printing */
0, /* not c-style arrays */
0, /* String lower bound */
&builtin_type_char, /* Type of string elements */
LANG_MAGIC
};
void
_initialize_java_language (void)
{
java_int_type = init_type (TYPE_CODE_INT, 4, 0, "int", NULL);
java_short_type = init_type (TYPE_CODE_INT, 2, 0, "short", NULL);
java_long_type = init_type (TYPE_CODE_INT, 8, 0, "long", NULL);
java_byte_type = init_type (TYPE_CODE_INT, 1, 0, "byte", NULL);
java_boolean_type = init_type (TYPE_CODE_BOOL, 1, 0, "boolean", NULL);
java_char_type = init_type (TYPE_CODE_CHAR, 2, TYPE_FLAG_UNSIGNED, "char", NULL);
java_float_type = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL);
java_double_type = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL);
java_void_type = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL);
add_language (&java_language_defn);
}
/* Cleanup code that should be run on every "run".
We should use make_run_cleanup to have this be called.
But will that mess up values in value histry? FIXME */
extern void java_rerun_cleanup (void);
void
java_rerun_cleanup (void)
{
if (class_symtab != NULL)
{
free_symtab (class_symtab); /* ??? */
class_symtab = NULL;
}
if (dynamics_objfile != NULL)
{
free_objfile (dynamics_objfile);
dynamics_objfile = NULL;
}
java_object_type = NULL;
}
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