diff options
Diffstat (limited to 'gdb/jv-valprint.c')
| -rw-r--r-- | gdb/jv-valprint.c | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/gdb/jv-valprint.c b/gdb/jv-valprint.c new file mode 100644 index 0000000..6bfae7e --- /dev/null +++ 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; +} |