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authorStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
committerStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
commit14cd51f7793a9ce07bc435069f57269450141363 (patch)
tree280a2da48f771d61be5b451ddbacdf9ef8e9ad13 /gdb/jv-valprint.c
downloadgdb-14cd51f7793a9ce07bc435069f57269450141363.tar.gz
Initial revision
Diffstat (limited to 'gdb/jv-valprint.c')
-rw-r--r--gdb/jv-valprint.c526
1 files changed, 526 insertions, 0 deletions
diff --git a/gdb/jv-valprint.c b/gdb/jv-valprint.c
new file mode 100644
index 00000000000..6bfae7e3274
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+++ b/gdb/jv-valprint.c
@@ -0,0 +1,526 @@
+/* Support for printing Java values for GDB, the GNU debugger.
+ Copyright 1997, 1998, 1999 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 "value.h"
+#include "demangle.h"
+#include "valprint.h"
+#include "language.h"
+#include "jv-lang.h"
+#include "c-lang.h"
+
+int
+java_value_print (val, stream, format, pretty)
+ value_ptr val;
+ GDB_FILE *stream;
+ int format;
+ enum val_prettyprint pretty;
+{
+ struct type *type;
+ CORE_ADDR address;
+ int i;
+ char *name;
+
+ type = VALUE_TYPE (val);
+ address = VALUE_ADDRESS (val) + VALUE_OFFSET (val);
+
+ if (is_object_type (type))
+ {
+ CORE_ADDR obj_addr;
+
+ /* Get the run-time type, and cast the object into that */
+
+ obj_addr = unpack_pointer (type, VALUE_CONTENTS (val));
+
+ if (obj_addr != 0)
+ {
+ type = type_from_class (java_class_from_object (val));
+ type = lookup_pointer_type (type);
+
+ val = value_at (type, address, NULL);
+ }
+ }
+
+ if (TYPE_CODE (type) == TYPE_CODE_PTR && ! value_logical_not (val))
+ type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
+
+ name = TYPE_TAG_NAME (type);
+ if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL
+ && (i = strlen (name), name[i-1] == ']'))
+ {
+ char buf4[4];
+ long length;
+ unsigned int things_printed = 0;
+ int reps;
+ struct type *el_type = java_primitive_type_from_name (name, i - 2);
+
+ i = 0;
+ read_memory (address + JAVA_OBJECT_SIZE, buf4, 4);
+
+ length = (long) extract_signed_integer (buf4, 4);
+ fprintf_filtered (stream, "{length: %ld", length);
+
+ if (el_type == NULL)
+ {
+ CORE_ADDR element, next_element;
+
+ address += JAVA_OBJECT_SIZE + 4; /* Skip object header and length. */
+
+ while (i < length && things_printed < print_max)
+ {
+ char buf[TARGET_PTR_BIT / HOST_CHAR_BIT];
+
+ fputs_filtered (", ", stream);
+ wrap_here (n_spaces (2));
+
+ if (i > 0)
+ element = next_element;
+ else
+ {
+ read_memory (address, buf, sizeof(buf));
+ address += TARGET_PTR_BIT / HOST_CHAR_BIT;
+ element = extract_address (buf, sizeof(buf));
+ }
+
+ for (reps = 1; i + reps < length; reps++)
+ {
+ read_memory (address, buf, sizeof(buf));
+ address += TARGET_PTR_BIT / HOST_CHAR_BIT;
+ next_element = extract_address (buf, sizeof(buf));
+ if (next_element != element)
+ break;
+ }
+
+ if (reps == 1)
+ fprintf_filtered (stream, "%d: ", i);
+ else
+ fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
+
+ if (element == 0)
+ fprintf_filtered (stream, "null");
+ else
+ fprintf_filtered (stream, "@%x", element);
+
+ things_printed++;
+ i += reps;
+ }
+ }
+ else
+ {
+ value_ptr v = allocate_value (el_type);
+ value_ptr next_v = allocate_value (el_type);
+
+ VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4;
+ VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v);
+
+ while (i < length && things_printed < print_max)
+ {
+ fputs_filtered (", ", stream);
+ wrap_here (n_spaces (2));
+
+ if (i > 0)
+ {
+ value_ptr tmp;
+
+ tmp = next_v;
+ next_v = v;
+ v = tmp;
+ }
+ else
+ {
+ VALUE_LAZY (v) = 1;
+ VALUE_OFFSET (v) = 0;
+ }
+
+ VALUE_OFFSET (next_v) = VALUE_OFFSET (v);
+
+ for (reps = 1; i + reps < length; reps++)
+ {
+ VALUE_LAZY (next_v) = 1;
+ VALUE_OFFSET (next_v) += TYPE_LENGTH (el_type);
+ if (memcmp (VALUE_CONTENTS (v), VALUE_CONTENTS (next_v),
+ TYPE_LENGTH (el_type)) != 0)
+ break;
+ }
+
+ if (reps == 1)
+ fprintf_filtered (stream, "%d: ", i);
+ else
+ fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
+
+ val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0, 0,
+ stream, format, 2, 1, pretty);
+
+ things_printed++;
+ i += reps;
+ }
+ }
+
+ if (i < length)
+ fprintf_filtered (stream, "...");
+
+ fprintf_filtered (stream, "}");
+
+ return 0;
+ }
+
+ /* If it's type String, print it */
+
+ if (TYPE_CODE (type) == TYPE_CODE_PTR
+ && TYPE_TARGET_TYPE (type)
+ && TYPE_NAME (TYPE_TARGET_TYPE (type))
+ && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "java.lang.String") == 0
+ && (format == 0 || format == 's')
+ && address != 0)
+ {
+ value_ptr data_val;
+ CORE_ADDR data;
+ value_ptr boffset_val;
+ unsigned long boffset;
+ value_ptr count_val;
+ unsigned long count;
+ value_ptr mark;
+
+ mark = value_mark (); /* Remember start of new values */
+
+ data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
+ data = value_as_pointer (data_val);
+
+ boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
+ boffset = value_as_pointer (boffset_val);
+
+ count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
+ count = value_as_pointer (count_val);
+
+ value_free_to_mark (mark); /* Release unnecessary values */
+
+ val_print_string (data + boffset, count, 2, stream);
+
+ return 0;
+ }
+
+ return (val_print (type, VALUE_CONTENTS (val), 0, address,
+ stream, format, 1, 0, pretty));
+}
+
+/* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
+ same meanings as in cp_print_value and c_val_print.
+
+ DONT_PRINT is an array of baseclass types that we
+ should not print, or zero if called from top level. */
+
+void
+java_print_value_fields (type, valaddr, address, stream,
+ format, recurse, pretty)
+ struct type *type;
+ char *valaddr;
+ CORE_ADDR address;
+ GDB_FILE *stream;
+ int format;
+ int recurse;
+ enum val_prettyprint pretty;
+{
+ int i, len, n_baseclasses;
+
+ CHECK_TYPEDEF (type);
+
+ fprintf_filtered (stream, "{");
+ len = TYPE_NFIELDS (type);
+ n_baseclasses = TYPE_N_BASECLASSES (type);
+
+ if (n_baseclasses > 0)
+ {
+ int i, n_baseclasses = TYPE_N_BASECLASSES (type);
+
+ for (i = 0; i < n_baseclasses; i++)
+ {
+ int boffset;
+ struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
+ char *basename = TYPE_NAME (baseclass);
+ char *base_valaddr;
+
+ if (BASETYPE_VIA_VIRTUAL (type, i))
+ continue;
+
+ if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
+ continue;
+
+ boffset = 0;
+
+ if (pretty)
+ {
+ fprintf_filtered (stream, "\n");
+ print_spaces_filtered (2 * (recurse+1), stream);
+ }
+ fputs_filtered ("<", stream);
+ /* Not sure what the best notation is in the case where there is no
+ baseclass name. */
+ fputs_filtered (basename ? basename : "", stream);
+ fputs_filtered ("> = ", stream);
+
+ base_valaddr = valaddr;
+
+ java_print_value_fields (baseclass, base_valaddr, address + boffset,
+ stream, format, recurse+1, pretty);
+ fputs_filtered (", ", stream);
+
+ flush_it:
+ ;
+ }
+
+ }
+
+ if (!len && n_baseclasses == 1)
+ fprintf_filtered (stream, "<No data fields>");
+ else
+ {
+ extern int inspect_it;
+ int fields_seen = 0;
+
+ for (i = n_baseclasses; i < len; i++)
+ {
+ /* If requested, skip printing of static fields. */
+ if (TYPE_FIELD_STATIC (type, i))
+ {
+ char *name = TYPE_FIELD_NAME (type, i);
+ if (!static_field_print)
+ continue;
+ if (name != NULL && strcmp (name, "class") == 0)
+ continue;
+ }
+ if (fields_seen)
+ fprintf_filtered (stream, ", ");
+ else if (n_baseclasses > 0)
+ {
+ if (pretty)
+ {
+ fprintf_filtered (stream, "\n");
+ print_spaces_filtered (2 + 2 * recurse, stream);
+ fputs_filtered ("members of ", stream);
+ fputs_filtered (type_name_no_tag (type), stream);
+ fputs_filtered (": ", stream);
+ }
+ }
+ fields_seen = 1;
+
+ if (pretty)
+ {
+ fprintf_filtered (stream, "\n");
+ print_spaces_filtered (2 + 2 * recurse, stream);
+ }
+ else
+ {
+ wrap_here (n_spaces (2 + 2 * recurse));
+ }
+ if (inspect_it)
+ {
+ if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
+ fputs_filtered ("\"( ptr \"", stream);
+ else
+ fputs_filtered ("\"( nodef \"", stream);
+ if (TYPE_FIELD_STATIC (type, i))
+ fputs_filtered ("static ", stream);
+ fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
+ language_cplus,
+ DMGL_PARAMS | DMGL_ANSI);
+ fputs_filtered ("\" \"", stream);
+ fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
+ language_cplus,
+ DMGL_PARAMS | DMGL_ANSI);
+ fputs_filtered ("\") \"", stream);
+ }
+ else
+ {
+ annotate_field_begin (TYPE_FIELD_TYPE (type, i));
+
+ if (TYPE_FIELD_STATIC (type, i))
+ fputs_filtered ("static ", stream);
+ fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
+ language_cplus,
+ DMGL_PARAMS | DMGL_ANSI);
+ annotate_field_name_end ();
+ fputs_filtered (": ", stream);
+ annotate_field_value ();
+ }
+
+ if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
+ {
+ value_ptr v;
+
+ /* Bitfields require special handling, especially due to byte
+ order problems. */
+ if (TYPE_FIELD_IGNORE (type, i))
+ {
+ fputs_filtered ("<optimized out or zero length>", stream);
+ }
+ else
+ {
+ v = value_from_longest (TYPE_FIELD_TYPE (type, i),
+ unpack_field_as_long (type, valaddr, i));
+
+ val_print (TYPE_FIELD_TYPE(type, i), VALUE_CONTENTS (v), 0,
+ 0, stream, format, 0, recurse + 1, pretty);
+ }
+ }
+ else
+ {
+ if (TYPE_FIELD_IGNORE (type, i))
+ {
+ fputs_filtered ("<optimized out or zero length>", stream);
+ }
+ else if (TYPE_FIELD_STATIC (type, i))
+ {
+ value_ptr v = value_static_field (type, i);
+ if (v == NULL)
+ fputs_filtered ("<optimized out>", stream);
+ else
+ {
+ struct type *t = check_typedef (VALUE_TYPE (v));
+ if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
+ v = value_addr (v);
+ val_print (VALUE_TYPE (v),
+ VALUE_CONTENTS (v), 0, VALUE_ADDRESS (v),
+ stream, format, 0, recurse+1, pretty);
+ }
+ }
+ else
+ {
+ val_print (TYPE_FIELD_TYPE (type, i),
+ valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0,
+ address + TYPE_FIELD_BITPOS (type, i) / 8,
+ stream, format, 0, recurse + 1, pretty);
+ }
+ }
+ annotate_field_end ();
+ }
+
+ if (pretty)
+ {
+ fprintf_filtered (stream, "\n");
+ print_spaces_filtered (2 * recurse, stream);
+ }
+ }
+ fprintf_filtered (stream, "}");
+}
+
+/* Print data of type TYPE located at VALADDR (within GDB), which came from
+ the inferior at address ADDRESS, onto stdio stream STREAM according to
+ FORMAT (a letter or 0 for natural format). The data at VALADDR is in
+ target byte order.
+
+ If the data are a string pointer, returns the number of string characters
+ printed.
+
+ If DEREF_REF is nonzero, then dereference references, otherwise just print
+ them like pointers.
+
+ The PRETTY parameter controls prettyprinting. */
+
+int
+java_val_print (type, valaddr, embedded_offset, address, stream, format,
+ deref_ref, recurse, pretty)
+ struct type *type;
+ char *valaddr;
+ CORE_ADDR address;
+ GDB_FILE *stream;
+ int format;
+ int deref_ref;
+ int recurse;
+ enum val_prettyprint pretty;
+{
+ register unsigned int i = 0; /* Number of characters printed */
+ struct type *target_type;
+ CORE_ADDR addr;
+
+ CHECK_TYPEDEF (type);
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_PTR:
+ if (format && format != 's')
+ {
+ print_scalar_formatted (valaddr, type, format, 0, stream);
+ break;
+ }
+#if 0
+ if (vtblprint && cp_is_vtbl_ptr_type(type))
+ {
+ /* Print the unmangled name if desired. */
+ /* Print vtable entry - we only get here if we ARE using
+ -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
+ print_address_demangle(extract_address (valaddr, TYPE_LENGTH (type)),
+ stream, demangle);
+ break;
+ }
+#endif
+ addr = unpack_pointer (type, valaddr);
+ if (addr == 0)
+ {
+ fputs_filtered ("null", stream);
+ return i;
+ }
+ target_type = check_typedef (TYPE_TARGET_TYPE (type));
+
+ if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)
+ {
+ /* Try to print what function it points to. */
+ print_address_demangle (addr, stream, demangle);
+ /* Return value is irrelevant except for string pointers. */
+ return (0);
+ }
+
+ if (addressprint && format != 's')
+ {
+ fputs_filtered ("@", stream);
+ print_longest (stream, 'x', 0, (ULONGEST) addr);
+ }
+
+ return i;
+
+ case TYPE_CODE_CHAR:
+ format = format ? format : output_format;
+ if (format)
+ print_scalar_formatted (valaddr, type, format, 0, stream);
+ else
+ LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);
+ break;
+
+ case TYPE_CODE_INT:
+ /* Can't just call c_val_print because that print bytes as C chars. */
+ format = format ? format : output_format;
+ if (format)
+ print_scalar_formatted (valaddr, type, format, 0, stream);
+ else
+ val_print_type_code_int (type, valaddr, stream);
+ break;
+
+ case TYPE_CODE_STRUCT:
+ java_print_value_fields (type, valaddr, address, stream, format,
+ recurse, pretty);
+ break;
+
+ default:
+ return c_val_print (type, valaddr, embedded_offset, address, stream,
+ format, deref_ref, recurse, pretty);
+ }
+
+ return 0;
+}