From 72019c9cbc1405cb0ecfab5d57a66279a45c19c5 Mon Sep 17 00:00:00 2001 From: Gaius Mulley Date: Sat, 13 May 2006 15:46:38 +0000 Subject: [PATCH] 2006-05-13 Gaius Mulley * gdb/m2-lang.h: added function extern prototypes for m2_is_long_set and get_long_set_bounds. * gm2/m2-typeprint.c: This file has been completely replaced to reflect the Modula-2 syntax rather than call the c_print_type function. (m2_print_type): walk the Modula-2 type tree. (m2_type_name): added. (m2_range): added. (m2_typedef): added. (m2_array): added. (m2_pointer): added. (m2_ref): added. (m2_unknown): added. (m2_union): added. (m2_procedure): added. (m2_print_bounds): added. (m2_short_set): added. (m2_is_long_set): added. (m2_get_discrete_bounds): added. (m2_is_long_set_of_type): added. (m2_long_set): added. (m2_record_fields): added. (m2_enum): added. * gdb/dwarf2read.c: added ability to detect the language Modula-2 and handle SET and CHAR types. (read_set_type): added. (process_die): call read_set_type. (read_base_type): modifed signed/unsigned char handling for Modula-2. (set_cu_language): added Modula-2 case clause. * gdb/m2-valprint.c: complete replacement so that Modula-2 values are printed rather than call the C language routines. (print_function_pointer_address): added. (get_long_set_bounds): added. (m2_print_long_set): added. (print_unpacked_pointer): added. (print_variable_at_address): added. (m2_val_print): replaced. --- gdb/ChangeLog | 40 ++++ gdb/MAINTAINERS | 1 + gdb/doc/ChangeLog | 4 + gdb/doc/gdb.texinfo | 167 +++++++++++++++- gdb/dwarf2read.c | 38 +++- gdb/m2-lang.h | 5 + gdb/m2-typeprint.c | 543 +++++++++++++++++++++++++++++++++++++++++++++++++- gdb/m2-valprint.c | 559 +++++++++++++++++++++++++++++++++++++++++++++++++++- 8 files changed, 1341 insertions(+), 16 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 7c018a8..99154d5 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,43 @@ +2006-05-13 Gaius Mulley + + * gdb/m2-lang.h: added function extern prototypes for m2_is_long_set and + get_long_set_bounds. + * gm2/m2-typeprint.c: This file has been completely + replaced to reflect the Modula-2 syntax rather than call the + c_print_type function. + (m2_print_type): walk the Modula-2 type tree. + (m2_type_name): added. + (m2_range): added. + (m2_typedef): added. + (m2_array): added. + (m2_pointer): added. + (m2_ref): added. + (m2_unknown): added. + (m2_union): added. + (m2_procedure): added. + (m2_print_bounds): added. + (m2_short_set): added. + (m2_is_long_set): added. + (m2_get_discrete_bounds): added. + (m2_is_long_set_of_type): added. + (m2_long_set): added. + (m2_record_fields): added. + (m2_enum): added. + * gdb/dwarf2read.c: added ability to detect the language Modula-2 + and handle SET and CHAR types. + (read_set_type): added. + (process_die): call read_set_type. + (read_base_type): modifed signed/unsigned char handling for Modula-2. + (set_cu_language): added Modula-2 case clause. + * gdb/m2-valprint.c: complete replacement so that Modula-2 values are + printed rather than call the C language routines. + (print_function_pointer_address): added. + (get_long_set_bounds): added. + (m2_print_long_set): added. + (print_unpacked_pointer): added. + (print_variable_at_address): added. + (m2_val_print): replaced. + 2006-05-12 Mark Kettenis * ppcnbsd-tdep.h: Update copyright year. Include diff --git a/gdb/MAINTAINERS b/gdb/MAINTAINERS index 4ed438a..c143a43 100644 --- a/gdb/MAINTAINERS +++ b/gdb/MAINTAINERS @@ -503,6 +503,7 @@ Marko Mlinar markom@opencores.org Alan Modra amodra@bigpond.net.au Jason Molenda jmolenda@apple.com Pierre Muller muller@sources.redhat.com +Gaius Mulley gaius@glam.ac.uk Joseph Myers joseph@codesourcery.com Fernando Nasser fnasser@redhat.com Nathanael Nerode neroden@gcc.gnu.org diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog index f759123..0dc8b24 100644 --- a/gdb/doc/ChangeLog +++ b/gdb/doc/ChangeLog @@ -1,3 +1,7 @@ +2006-05-13 Gaius Mulley + + * gdb/doc/gdb.texinfo: added a section on Modula-2 Types. + 2006-05-10 Daniel Jacobowitz * agentexpr.texi: Add a copyright and license notice. diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index e2b986a..74617c7 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -9471,6 +9471,7 @@ table. * M2 Operators:: Built-in operators * Built-In Func/Proc:: Built-in functions and procedures * M2 Constants:: Modula-2 constants +* M2 Types:: Modula-2 types * M2 Defaults:: Default settings for Modula-2 * Deviations:: Deviations from standard Modula-2 * M2 Checks:: Modula-2 type and range checks @@ -9595,7 +9596,7 @@ as @code{^}. @end table @quotation -@emph{Warning:} Sets and their operations are not yet supported, so @value{GDBN} +@emph{Warning:} Set expressions and their operations are not yet supported, so @value{GDBN} treats the use of the operator @code{IN}, or the use of operators @code{+}, @code{-}, @code{*}, @code{/}, @code{=}, , @code{<>}, @code{#}, @code{<=}, and @code{>=} on sets as an error. @@ -9764,6 +9765,170 @@ Pointer constants consist of integral values only. Set constants are not yet supported. @end itemize +@node M2 Types +@subsubsection Modula-2 Types +@cindex Modula-2 types + +Currently @value{GDBN} can print the following data types in Modula-2 +syntax: array types, record types, set types, pointer types, procedure +types, enumerated types, subrange types and base types. You can also +print the contents of variables declared using these type. +This section gives a number of simple source code examples together with +sample @value{GDBN} sessions. + +The first example contains the following section of code: + +@smallexample +VAR + s: SET OF CHAR ; + r: [20..40] ; +@end smallexample + +@noindent +and you can request @value{GDBN} to interrogate the type and value of +@code{r} and @code{s}. + +@smallexample +(@value{GDBP}) print s +@{'A'..'C', 'Z'@} +(@value{GDBP}) ptype s +SET OF CHAR +(@value{GDBP}) print r +21 +(@value{GDBP}) ptype r +[20..40] +@end smallexample + +@noindent +Likewise if your source code declares @code{s} as: + +@smallexample +VAR + s: SET ['A'..'Z'] ; +@end smallexample + +@noindent +then you may query the type of @code{s} by: + +@smallexample +(@value{GDBP}) ptype s +type = SET ['A'..'Z'] +@end smallexample + +@noindent +Note that at present you cannot interactively manipulate set +expressions using the debugger. + +The following example shows how you might declare an array in Modula-2 +and how you can interact with @value{GDBN} to print its type and contents: + +@smallexample +VAR + s: ARRAY [-10..10] OF CHAR ; +@end smallexample + +@smallexample +(@value{GDBP}) ptype s +ARRAY [-10..10] OF CHAR +@end smallexample + +Note that the array handling is not yet complete and although the type +is printed correctly, expression handling still assumes that all +arrays have a lower bound of zero and not @code{-10} as in the example +above. Unbounded arrays are also not yet recognized in @value{GDBN}. + +Here are some more type related Modula-2 examples: + +@smallexample +TYPE + colour = (blue, red, yellow, green) ; + t = [blue..yellow] ; +VAR + s: t ; +BEGIN + s := blue ; +@end smallexample + +@noindent +The @value{GDBN} interaction shows how you can query the data type +and value of a variable. + +@smallexample +(@value{GDBP}) print s +$1 = blue +(@value{GDBP}) ptype t +type = [blue..yellow] +@end smallexample + +@noindent +In this example a Modula-2 array is declared and its contents +displayed. Observe that the contents are written in the same way as +their @code{C} counterparts. + +@smallexample +VAR + s: ARRAY [1..5] OF CARDINAL ; +BEGIN + s[1] := 1 ; +@end smallexample + +@smallexample +(@value{GDBP}) print s +$1 = @{1, 0, 0, 0, 0@} +(@value{GDBP}) ptype s +type = ARRAY [1..5] OF CARDINAL +@end smallexample + +The Modula-2 language interface to @value{GDBN} also understands +pointer types as shown in this example: + +@smallexample +VAR + s: POINTER TO ARRAY [1..5] OF CARDINAL ; +BEGIN + NEW(s) ; + s^[1] := 1 ; +@end smallexample + +@noindent +and you can request that @value{GDBN} describes the type of @code{s}. + +@smallexample +(@value{GDBP}) ptype s +type = POINTER TO ARRAY [1..5] OF CARDINAL +@end smallexample + +@value{GDBN} handles compound types as we can see in this example. +Here we combine array types, record types, pointer types and subrange +types: + +@smallexample +TYPE + foo = RECORD + f1: CARDINAL ; + f2: CHAR ; + f3: myarray ; + END ; + + myarray = ARRAY myrange OF CARDINAL ; + myrange = [-2..2] ; +VAR + s: POINTER TO ARRAY myrange OF foo ; +@end smallexample + +@noindent +and you can ask @value{GDBN} to describe the type of @code{s} as shown +below. + +@smallexample +(@value{GDBP}) ptype s +type = POINTER TO ARRAY [-2..2] OF foo = RECORD + f1 : CARDINAL; + f2 : CHAR; + f3 : ARRAY [-2..2] OF CARDINAL; +END +@end smallexample + @node M2 Defaults @subsubsection Modula-2 defaults @cindex Modula-2 defaults diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c index 0881e3d..31b0ae0 100644 --- a/gdb/dwarf2read.c +++ b/gdb/dwarf2read.c @@ -1,7 +1,7 @@ /* DWARF 2 debugging format support for GDB. - Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, - 2004, 2005, 2006 + Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, + 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, @@ -1073,6 +1073,9 @@ static void dwarf2_mark (struct dwarf2_cu *); static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); +static void read_set_type (struct die_info *, struct dwarf2_cu *); + + /* Try to locate the sections we need for DWARF 2 debugging information and return true if we have enough to do something. */ @@ -2662,6 +2665,9 @@ process_die (struct die_info *die, struct dwarf2_cu *cu) case DW_TAG_subroutine_type: read_subroutine_type (die, cu); break; + case DW_TAG_set_type: + read_set_type (die, cu); + break; case DW_TAG_array_type: read_array_type (die, cu); break; @@ -4240,6 +4246,15 @@ read_array_order (struct die_info *die, struct dwarf2_cu *cu) }; } +/* Extract all information from a DW_TAG_set_type DIE and put it in + the DIE's type field. */ + +static void +read_set_type (struct die_info *die, struct dwarf2_cu *cu) +{ + if (die->type == NULL) + die->type = create_set_type ((struct type *) NULL, die_type (die, cu)); +} /* First cut: install each common block member as a global variable. */ @@ -4728,10 +4743,17 @@ read_base_type (struct die_info *die, struct dwarf2_cu *cu) code = TYPE_CODE_FLT; break; case DW_ATE_signed: - case DW_ATE_signed_char: break; case DW_ATE_unsigned: - case DW_ATE_unsigned_char: + type_flags |= TYPE_FLAG_UNSIGNED; + break; + case DW_ATE_signed_char: + if (cu->language == language_m2) + code = TYPE_CODE_CHAR; + break; + case DW_ATE_unsigned_char: + if (cu->language == language_m2) + code = TYPE_CODE_CHAR; type_flags |= TYPE_FLAG_UNSIGNED; break; default: @@ -6168,10 +6190,12 @@ set_cu_language (unsigned int lang, struct dwarf2_cu *cu) case DW_LANG_Ada95: cu->language = language_ada; break; + case DW_LANG_Modula2: + cu->language = language_m2; + break; case DW_LANG_Cobol74: case DW_LANG_Cobol85: case DW_LANG_Pascal83: - case DW_LANG_Modula2: default: cu->language = language_minimal; break; @@ -6961,6 +6985,7 @@ new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) case DW_TAG_class_type: case DW_TAG_structure_type: case DW_TAG_union_type: + case DW_TAG_set_type: case DW_TAG_enumeration_type: SYMBOL_CLASS (sym) = LOC_TYPEDEF; SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; @@ -7290,6 +7315,9 @@ read_type_die (struct die_info *die, struct dwarf2_cu *cu) case DW_TAG_array_type: read_array_type (die, cu); break; + case DW_TAG_set_type: + read_set_type (die, cu); + break; case DW_TAG_pointer_type: read_tag_pointer_type (die, cu); break; diff --git a/gdb/m2-lang.h b/gdb/m2-lang.h index a57cef0..294707a 100644 --- a/gdb/m2-lang.h +++ b/gdb/m2-lang.h @@ -27,6 +27,11 @@ extern void m2_error (char *); /* Defined in m2-exp.y */ extern void m2_print_type (struct type *, char *, struct ui_file *, int, int); +extern int m2_is_long_set (struct type *type); + extern int m2_val_print (struct type *, const gdb_byte *, int, CORE_ADDR, struct ui_file *, int, int, int, enum val_prettyprint); + +extern int get_long_set_bounds (struct type *type, LONGEST *low, + LONGEST *high); diff --git a/gdb/m2-typeprint.c b/gdb/m2-typeprint.c index 7763d32..160305c 100644 --- a/gdb/m2-typeprint.c +++ b/gdb/m2-typeprint.c @@ -1,5 +1,6 @@ /* Support for printing Modula 2 types for GDB, the GNU debugger. - Copyright (C) 1986, 1988, 1989, 1991, 1992, 1995, 2000 + Copyright (C) 1986, 1988, 1989, 1991, 1992, 1995, 2000, 2001, + 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. This file is part of GDB. @@ -20,22 +21,554 @@ Boston, MA 02110-1301, USA. */ #include "defs.h" +#include "gdb_obstack.h" #include "bfd.h" /* Binary File Description */ #include "symtab.h" #include "gdbtypes.h" #include "expression.h" #include "value.h" #include "gdbcore.h" -#include "target.h" #include "m2-lang.h" +#include "target.h" +#include "language.h" +#include "demangle.h" +#include "c-lang.h" +#include "typeprint.h" +#include "cp-abi.h" + +#include "gdb_string.h" #include +static void m2_print_bounds (struct type *type, + struct ui_file *stream, int show, int level, + int print_high); + +static void m2_typedef (struct type *, struct ui_file *, int, int); +static void m2_array (struct type *, struct ui_file *, int, int); +static void m2_pointer (struct type *, struct ui_file *, int, int); +static void m2_ref (struct type *, struct ui_file *, int, int); +static void m2_procedure (struct type *, struct ui_file *, int, int); +static void m2_union (struct type *, struct ui_file *); +static void m2_enum (struct type *, struct ui_file *, int, int); +static void m2_range (struct type *, struct ui_file *, int, int); +static void m2_type_name (struct type *type, struct ui_file *stream); +static void m2_short_set (struct type *type, struct ui_file *stream, + int show, int level); +static int m2_long_set (struct type *type, struct ui_file *stream, + int show, int level); +static void m2_record_fields (struct type *type, struct ui_file *stream, + int show, int level); +static void m2_unknown (const char *s, struct type *type, + struct ui_file *stream, int show, int level); + +int m2_is_long_set (struct type *type); +int m2_is_long_set_of_type (struct type *type, struct type **of_type); + + void m2_print_type (struct type *type, char *varstring, struct ui_file *stream, int show, int level) { - extern void c_print_type (struct type *, char *, struct ui_file *, int, - int); + enum type_code code; + int demangled_args; + + CHECK_TYPEDEF (type); + code = TYPE_CODE (type); + + QUIT; + + wrap_here (" "); + if (type == NULL) + { + fputs_filtered (_(""), stream); + return; + } + + switch (TYPE_CODE (type)) + { + case TYPE_CODE_SET: + m2_short_set(type, stream, show, level); + break; + + case TYPE_CODE_STRUCT: + if (m2_long_set (type, stream, show, level)) + break; + m2_record_fields (type, stream, show, level); + break; + + case TYPE_CODE_TYPEDEF: + m2_typedef (type, stream, show, level); + break; + + case TYPE_CODE_ARRAY: + m2_array (type, stream, show, level); + break; + + case TYPE_CODE_PTR: + m2_pointer (type, stream, show, level); + break; + + case TYPE_CODE_REF: + m2_ref (type, stream, show, level); + break; + + case TYPE_CODE_MEMBER: + m2_unknown (_("member"), type, stream, show, level); + break; + + case TYPE_CODE_METHOD: + m2_unknown (_("method"), type, stream, show, level); + break; + + case TYPE_CODE_FUNC: + m2_procedure (type, stream, show, level); + break; + + case TYPE_CODE_UNION: + m2_union (type, stream); + break; + + case TYPE_CODE_ENUM: + m2_enum (type, stream, show, level); + break; + + case TYPE_CODE_VOID: + break; + + case TYPE_CODE_UNDEF: + /* i18n: Do not translate the "struct" part! */ + m2_unknown (_("undef"), type, stream, show, level); + break; + + case TYPE_CODE_ERROR: + m2_unknown (_("error"), type, stream, show, level); + break; + + case TYPE_CODE_RANGE: + m2_range (type, stream, show, level); + break; + + case TYPE_CODE_TEMPLATE: + break; + + default: + m2_type_name (type, stream); + break; + } +} + +/* + * m2_type_name - if a, type, has a name then print it. + */ + +void +m2_type_name (struct type *type, struct ui_file *stream) +{ + if (TYPE_NAME (type) != NULL) + fputs_filtered (TYPE_NAME (type), stream); +} + +/* + * m2_range - displays a Modula-2 subrange type. + */ + +void +m2_range (struct type *type, struct ui_file *stream, int show, + int level) +{ + if (TYPE_HIGH_BOUND (type) == TYPE_LOW_BOUND (type)) + m2_print_type (TYPE_DOMAIN_TYPE (type), "", stream, show, level); + else + { + struct type *target = TYPE_TARGET_TYPE (type); + + fprintf_filtered (stream, "["); + print_type_scalar (target, TYPE_LOW_BOUND (type), stream); + fprintf_filtered (stream, ".."); + print_type_scalar (target, TYPE_HIGH_BOUND (type), stream); + fprintf_filtered (stream, "]"); + } +} + +static void +m2_typedef (struct type *type, struct ui_file *stream, int show, + int level) +{ + if (TYPE_NAME (type) != NULL) + { + fputs_filtered (TYPE_NAME (type), stream); + fputs_filtered (" = ", stream); + } + m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level); +} + +/* + * m2_array - prints out a Modula-2 ARRAY ... OF type + */ + +static void m2_array (struct type *type, struct ui_file *stream, + int show, int level) +{ + fprintf_filtered (stream, "ARRAY ["); + if (TYPE_LENGTH (type) >= 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0 + && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) + { + if (TYPE_INDEX_TYPE (type) != 0) + { + m2_print_bounds (TYPE_INDEX_TYPE (type), stream, show, -1, 0); + fprintf_filtered (stream, ".."); + m2_print_bounds (TYPE_INDEX_TYPE (type), stream, show, -1, 1); + } + else + fprintf_filtered (stream, "%d", + (TYPE_LENGTH (type) + / TYPE_LENGTH (TYPE_TARGET_TYPE (type)))); + } + fprintf_filtered (stream, "] OF "); + m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level); +} + +static void +m2_pointer (struct type *type, struct ui_file *stream, int show, + int level) +{ + if (TYPE_CONST (type)) + fprintf_filtered (stream, "[...] : "); + else + fprintf_filtered (stream, "POINTER TO "); + + m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level); +} + +static void +m2_ref (struct type *type, struct ui_file *stream, int show, + int level) +{ + fprintf_filtered (stream, "VAR"); + m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level); +} + +static void +m2_unknown (const char *s, struct type *type, struct ui_file *stream, + int show, int level) +{ + fprintf_filtered (stream, "%s %s", s, _("is unknown")); +} + +static void m2_union (struct type *type, struct ui_file *stream) +{ + fprintf_filtered (stream, "union"); +} + +static void +m2_procedure (struct type *type, struct ui_file *stream, + int show, int level) +{ + fprintf_filtered (stream, "PROCEDURE "); + m2_type_name (type, stream); + if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_VOID) + { + int i, len = TYPE_NFIELDS (type); + + fprintf_filtered (stream, " ("); + for (i = 0; i < len; i++) + { + if (i > 0) + { + fputs_filtered (", ", stream); + wrap_here (" "); + } + m2_print_type (TYPE_FIELD_TYPE (type, i), "", stream, -1, 0); + } + if (TYPE_TARGET_TYPE (type) != NULL) + { + fprintf_filtered (stream, " : "); + m2_print_type (TYPE_TARGET_TYPE (type), "", stream, 0, 0); + } + } +} + +static void +m2_print_bounds (struct type *type, + struct ui_file *stream, int show, int level, + int print_high) +{ + struct type *target = TYPE_TARGET_TYPE (type); + + if (target == NULL) + target = builtin_type_int; + + if (TYPE_NFIELDS(type) == 0) + return; + + if (print_high) + print_type_scalar (target, TYPE_HIGH_BOUND (type), stream); + else + print_type_scalar (target, TYPE_LOW_BOUND (type), stream); +} + +static void +m2_short_set (struct type *type, struct ui_file *stream, int show, int level) +{ + fprintf_filtered(stream, "SET ["); + m2_print_bounds (TYPE_INDEX_TYPE (type), stream, + show - 1, level, 0); + + fprintf_filtered(stream, ".."); + m2_print_bounds (TYPE_INDEX_TYPE (type), stream, + show - 1, level, 1); + fprintf_filtered(stream, "]"); +} + +int +m2_is_long_set (struct type *type) +{ + LONGEST previous_high = 0; /* unnecessary initialization + keeps gcc -Wall happy */ + int len, i; + struct type *range; + + if (TYPE_CODE (type) == TYPE_CODE_STRUCT) + { + + /* + * check if all fields of the RECORD are consecutive sets + */ + len = TYPE_NFIELDS (type); + for (i = TYPE_N_BASECLASSES (type); i < len; i++) + { + if (TYPE_FIELD_TYPE (type, i) == NULL) + return 0; + if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) != TYPE_CODE_SET) + return 0; + if (TYPE_FIELD_NAME (type, i) != NULL + && (strcmp (TYPE_FIELD_NAME (type, i), "") != 0)) + return 0; + range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)); + if ((i > TYPE_N_BASECLASSES (type)) + && previous_high + 1 != TYPE_LOW_BOUND (range)) + return 0; + previous_high = TYPE_HIGH_BOUND (range); + } + return len>0; + } + return 0; +} + +/* + * m2_get_discrete_bounds - a wrapper for get_discrete_bounds which + * understands that CHARs might be signed. + * This should be integrated into gdbtypes.c + * inside get_discrete_bounds. + */ + +int +m2_get_discrete_bounds (struct type *type, LONGEST *lowp, LONGEST *highp) +{ + CHECK_TYPEDEF (type); + switch (TYPE_CODE (type)) + { + case TYPE_CODE_CHAR: + if (TYPE_LENGTH (type) < sizeof (LONGEST)) + { + if (!TYPE_UNSIGNED (type)) + { + *lowp = -(1 << (TYPE_LENGTH (type) * TARGET_CHAR_BIT - 1)); + *highp = -*lowp - 1; + return 0; + } + } + /* fall through */ + default: + return get_discrete_bounds (type, lowp, highp); + } +} + +/* + * m2_is_long_set_of_type - returns TRUE if the long set was declared as + * SET OF of_type is assigned to the + * subtype. + */ + +int +m2_is_long_set_of_type (struct type *type, struct type **of_type) +{ + int len, i; + struct type *range; + struct type *target; + LONGEST l1, l2; + LONGEST h1, h2; + + if (TYPE_CODE (type) == TYPE_CODE_STRUCT) + { + len = TYPE_NFIELDS (type); + i = TYPE_N_BASECLASSES (type); + if (len == 0) + return 0; + range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)); + target = TYPE_TARGET_TYPE (range); + if (target == NULL) + target = builtin_type_int; + + l1 = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i))); + h1 = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, len-1))); + *of_type = target; + if (m2_get_discrete_bounds (target, &l2, &h2) >= 0) + return (l1 == l2 && h1 == h2); + error (_("long_set failed to find discrete bounds for its subtype")); + return 0; + } + error (_("expecting long_set")); + return 0; +} + +static int +m2_long_set (struct type *type, struct ui_file *stream, int show, int level) +{ + struct type *index_type; + struct type *range_type; + struct type *of_type; + int i; + int len = TYPE_NFIELDS (type); + LONGEST low; + LONGEST high; + + if (m2_is_long_set (type)) + { + if (TYPE_TAG_NAME (type) != NULL) + { + fputs_filtered (TYPE_TAG_NAME (type), stream); + if (show == 0) + return 1; + } + else if (TYPE_NAME (type) != NULL) + { + fputs_filtered (TYPE_NAME (type), stream); + if (show == 0) + return 1; + } + + if (TYPE_TAG_NAME (type) != NULL || TYPE_NAME (type) != NULL) + fputs_filtered (" = ", stream); + + if (get_long_set_bounds (type, &low, &high)) + { + fprintf_filtered(stream, "SET OF "); + i = TYPE_N_BASECLASSES (type); + if (m2_is_long_set_of_type (type, &of_type)) + m2_print_type (of_type, "", stream, show - 1, level); + else + { + fprintf_filtered(stream, "["); + m2_print_bounds (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)), + stream, show - 1, level, 0); + + fprintf_filtered(stream, ".."); + + m2_print_bounds (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, len-1)), + stream, show - 1, level, 1); + fprintf_filtered(stream, "]"); + } + } + else + /* i18n: Do not translate the "SET OF" part! */ + fprintf_filtered(stream, _("SET OF ")); + + return 1; + } + return 0; +} + +void +m2_record_fields (struct type *type, struct ui_file *stream, int show, + int level) +{ + /* Print the tag if it exists. + */ + if (TYPE_TAG_NAME (type) != NULL) + { + if (strncmp (TYPE_TAG_NAME (type), "$$", 2) != 0) + { + fputs_filtered (TYPE_TAG_NAME (type), stream); + if (show > 0) + fprintf_filtered (stream, " = "); + } + } + wrap_here (" "); + if (show < 0) + { + if (TYPE_CODE (type) == DECLARED_TYPE_STRUCT) + fprintf_filtered (stream, "RECORD ... END "); + else if (TYPE_DECLARED_TYPE (type) == DECLARED_TYPE_UNION) + fprintf_filtered (stream, "CASE ... END "); + } + else if (show > 0) + { + if (TYPE_CODE (type) == TYPE_CODE_STRUCT) + fprintf_filtered (stream, "RECORD\n"); + else if (TYPE_CODE (type) == TYPE_CODE_UNION) + /* i18n: Do not translate "CASE" and "OF" */ + fprintf_filtered (stream, _("CASE OF\n")); + int i; + int len = TYPE_NFIELDS (type); + + for (i = TYPE_N_BASECLASSES (type); i < len; i++) + { + QUIT; + + print_spaces_filtered (level + 4, stream); + fputs_filtered (TYPE_FIELD_NAME (type, i), stream); + fputs_filtered (" : ", stream); + m2_print_type (TYPE_FIELD_TYPE (type, i), + "", + stream, 0, level + 4); + if (TYPE_FIELD_PACKED (type, i)) + { + /* It is a bitfield. This code does not attempt + to look at the bitpos and reconstruct filler, + unnamed fields. This would lead to misleading + results if the compiler does not put out fields + for such things (I don't know what it does). */ + fprintf_filtered (stream, " : %d", + TYPE_FIELD_BITSIZE (type, i)); + } + fprintf_filtered (stream, ";\n"); + } + + fprintfi_filtered (level, stream, "END "); + } +} + +void +m2_enum (struct type *type, struct ui_file *stream, int show, int level) +{ + int lastval, i, len; - c_print_type (type, varstring, stream, show, level); /* FIXME */ + if (show < 0) + { + /* If we just printed a tag name, no need to print anything else. */ + if (TYPE_TAG_NAME (type) == NULL) + fprintf_filtered (stream, "(...)"); + } + else if (show > 0 || TYPE_TAG_NAME (type) == NULL) + { + fprintf_filtered (stream, "("); + len = TYPE_NFIELDS (type); + lastval = 0; + for (i = 0; i < len; i++) + { + QUIT; + if (i > 0) + fprintf_filtered (stream, ", "); + wrap_here (" "); + fputs_filtered (TYPE_FIELD_NAME (type, i), stream); + if (lastval != TYPE_FIELD_BITPOS (type, i)) + { + fprintf_filtered (stream, " = %d", TYPE_FIELD_BITPOS (type, i)); + lastval = TYPE_FIELD_BITPOS (type, i); + } + lastval++; + } + fprintf_filtered (stream, ")"); + } } diff --git a/gdb/m2-valprint.c b/gdb/m2-valprint.c index 7b38dc9..579ea8b 100644 --- a/gdb/m2-valprint.c +++ b/gdb/m2-valprint.c @@ -1,7 +1,8 @@ /* Support for printing Modula 2 values for GDB, the GNU debugger. - Copyright (C) 1986, 1988, 1989, 1991, 1992, 1996, 1998, 2000, 2005 Free - Software Foundation, Inc. + Copyright (C) 1986, 1988, 1989, 1991, 1992, 1996, 1998, + 2000, 2005, 2006 + Free Software Foundation, Inc. This file is part of GDB. @@ -23,14 +24,562 @@ #include "defs.h" #include "symtab.h" #include "gdbtypes.h" -#include "m2-lang.h" +#include "expression.h" +#include "value.h" +#include "valprint.h" +#include "language.h" +#include "typeprint.h" #include "c-lang.h" +#include "m2-lang.h" +#include "target.h" + +int print_unpacked_pointer (struct type *type, + CORE_ADDR address, CORE_ADDR addr, + int format, struct ui_file *stream); + + +/* Print function pointer with inferior address ADDRESS onto stdio + stream STREAM. */ + +static void +print_function_pointer_address (CORE_ADDR address, struct ui_file *stream) +{ + CORE_ADDR func_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch, + address, + ¤t_target); + + /* If the function pointer is represented by a description, print the + address of the description. */ + if (addressprint && func_addr != address) + { + fputs_filtered ("@", stream); + fputs_filtered (paddress (address), stream); + fputs_filtered (": ", stream); + } + print_address_demangle (func_addr, stream, demangle); +} + +/* + * get_long_set_bounds - assigns the bounds of the long set to low and high. + */ + +int +get_long_set_bounds (struct type *type, LONGEST *low, LONGEST *high) +{ + int len, i; + + if (TYPE_CODE (type) == TYPE_CODE_STRUCT) + { + len = TYPE_NFIELDS (type); + i = TYPE_N_BASECLASSES (type); + if (len == 0) + return 0; + *low = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i))); + *high = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, + len-1))); + return 1; + } + error (_("expecting long_set")); + return 0; +} + +static void +m2_print_long_set (struct type *type, const gdb_byte *valaddr, + int embedded_offset, CORE_ADDR address, + struct ui_file *stream, int format, + enum val_prettyprint pretty) +{ + int empty_set = 1; + int element_seen = 0; + LONGEST previous_low = 0; + LONGEST previous_high= 0; + LONGEST i, low_bound, high_bound; + LONGEST field_low, field_high; + struct type *range; + int len, field; + struct type *target; + int bitval; + + CHECK_TYPEDEF (type); + + fprintf_filtered (stream, "{"); + len = TYPE_NFIELDS (type); + if (get_long_set_bounds (type, &low_bound, &high_bound)) + { + field = TYPE_N_BASECLASSES (type); + range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field)); + } + else + { + fprintf_filtered (stream, " %s }", _("")); + return; + } + + target = TYPE_TARGET_TYPE (range); + if (target == NULL) + target = builtin_type_int; + + if (get_discrete_bounds (range, &field_low, &field_high) >= 0) + { + for (i = low_bound; i <= high_bound; i++) + { + bitval = value_bit_index (TYPE_FIELD_TYPE (type, field), + (TYPE_FIELD_BITPOS (type, field) / 8) + + valaddr + embedded_offset, i); + if (bitval < 0) + error (_("bit test is out of range")); + else if (bitval > 0) + { + previous_high = i; + if (! element_seen) + { + if (! empty_set) + fprintf_filtered (stream, ", "); + print_type_scalar (target, i, stream); + empty_set = 0; + element_seen = 1; + previous_low = i; + } + } + else + { + /* bit is not set */ + if (element_seen) + { + if (previous_low+1 < previous_high) + fprintf_filtered (stream, ".."); + if (previous_low+1 < previous_high) + print_type_scalar (target, previous_high, stream); + element_seen = 0; + } + } + if (i == field_high) + { + field++; + if (field == len) + break; + range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field)); + if (get_discrete_bounds (range, &field_low, &field_high) < 0) + break; + target = TYPE_TARGET_TYPE (range); + if (target == NULL) + target = builtin_type_int; + } + } + if (element_seen) + { + if (previous_low+1 < previous_high) + { + fprintf_filtered (stream, ".."); + print_type_scalar (target, previous_high, stream); + } + element_seen = 0; + } + fprintf_filtered (stream, "}"); + } +} + +int +print_unpacked_pointer (struct type *type, + CORE_ADDR address, CORE_ADDR addr, + int format, struct ui_file *stream) +{ + struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type)); + + if (TYPE_CODE (elttype) == TYPE_CODE_FUNC) + { + /* Try to print what function it points to. */ + print_function_pointer_address (addr, stream); + /* Return value is irrelevant except for string pointers. */ + return 0; + } + + if (addressprint && format != 's') + fputs_filtered (paddress (address), stream); + + /* For a pointer to char or unsigned char, also print the string + pointed to, unless pointer is null. */ + + if (TYPE_LENGTH (elttype) == 1 + && TYPE_CODE (elttype) == TYPE_CODE_INT + && (format == 0 || format == 's') + && addr != 0) + return val_print_string (addr, -1, TYPE_LENGTH (elttype), stream); + + return 0; +} + +static void +print_variable_at_address (struct type *type, const gdb_byte *valaddr, + struct ui_file *stream, int format, + int deref_ref, int recurse, + enum val_prettyprint pretty) +{ + CORE_ADDR addr = unpack_pointer (type, valaddr); + struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type)); + + fprintf_filtered (stream, "["); + fputs_filtered (paddress (addr), stream); + fprintf_filtered (stream, "] : "); + + if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF) + { + struct value *deref_val = + value_at + (TYPE_TARGET_TYPE (type), + unpack_pointer (lookup_pointer_type (builtin_type_void), + valaddr)); + common_val_print (deref_val, stream, format, deref_ref, + recurse, pretty); + } + else + fputs_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 m2_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset, CORE_ADDR address, struct ui_file *stream, int format, int deref_ref, int recurse, enum val_prettyprint pretty) { - return (c_val_print (type, valaddr, 0, address, stream, format, deref_ref, - recurse, pretty)); + unsigned int i = 0; /* Number of characters printed */ + unsigned len; + struct type *elttype; + unsigned eltlen; + int length_pos, length_size, string_pos; + int char_size; + LONGEST val; + CORE_ADDR addr; + + CHECK_TYPEDEF (type); + switch (TYPE_CODE (type)) + { + case TYPE_CODE_ARRAY: + if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0) + { + elttype = check_typedef (TYPE_TARGET_TYPE (type)); + eltlen = TYPE_LENGTH (elttype); + len = TYPE_LENGTH (type) / eltlen; + if (prettyprint_arrays) + print_spaces_filtered (2 + 2 * recurse, stream); + /* For an array of chars, print with string syntax. */ + if (eltlen == 1 && + ((TYPE_CODE (elttype) == TYPE_CODE_INT) + || ((current_language->la_language == language_m2) + && (TYPE_CODE (elttype) == TYPE_CODE_CHAR))) + && (format == 0 || format == 's')) + { + /* If requested, look for the first null char and only print + elements up to it. */ + if (stop_print_at_null) + { + unsigned int temp_len; + + /* Look for a NULL char. */ + for (temp_len = 0; + (valaddr + embedded_offset)[temp_len] + && temp_len < len && temp_len < print_max; + temp_len++); + len = temp_len; + } + + LA_PRINT_STRING (stream, valaddr + embedded_offset, len, 1, 0); + i = len; + } + else + { + fprintf_filtered (stream, "{"); + val_print_array_elements (type, valaddr + embedded_offset, + address, stream, format, deref_ref, + recurse, pretty, 0); + fprintf_filtered (stream, "}"); + } + break; + } + /* Array of unspecified length: treat like pointer to first elt. */ + print_unpacked_pointer (type, address, address, format, stream); + break; + + case TYPE_CODE_PTR: + if (TYPE_CONST (type)) + print_variable_at_address (type, valaddr + embedded_offset, + stream, format, deref_ref, recurse, + pretty); + else if (format && format != 's') + print_scalar_formatted (valaddr + embedded_offset, type, format, + 0, stream); + else + { + addr = unpack_pointer (type, valaddr + embedded_offset); + print_unpacked_pointer (type, addr, address, format, stream); + } + break; + + case TYPE_CODE_MEMBER: + error (_("not implemented: member type in m2_val_print")); + break; + + case TYPE_CODE_REF: + elttype = check_typedef (TYPE_TARGET_TYPE (type)); + if (addressprint) + { + CORE_ADDR addr + = extract_typed_address (valaddr + embedded_offset, type); + fprintf_filtered (stream, "@"); + fputs_filtered (paddress (addr), stream); + if (deref_ref) + fputs_filtered (": ", stream); + } + /* De-reference the reference. */ + if (deref_ref) + { + if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF) + { + struct value *deref_val = + value_at + (TYPE_TARGET_TYPE (type), + unpack_pointer (lookup_pointer_type (builtin_type_void), + valaddr + embedded_offset)); + common_val_print (deref_val, stream, format, deref_ref, + recurse, pretty); + } + else + fputs_filtered ("???", stream); + } + break; + + case TYPE_CODE_UNION: + if (recurse && !unionprint) + { + fprintf_filtered (stream, "{...}"); + break; + } + /* Fall through. */ + case TYPE_CODE_STRUCT: + if (m2_is_long_set (type)) + m2_print_long_set (type, valaddr, embedded_offset, address, + stream, format, pretty); + else + cp_print_value_fields (type, type, valaddr, embedded_offset, + address, stream, format, + recurse, pretty, NULL, 0); + break; + + case TYPE_CODE_ENUM: + if (format) + { + print_scalar_formatted (valaddr + embedded_offset, type, + format, 0, stream); + break; + } + len = TYPE_NFIELDS (type); + val = unpack_long (type, valaddr + embedded_offset); + for (i = 0; i < len; i++) + { + QUIT; + if (val == TYPE_FIELD_BITPOS (type, i)) + { + break; + } + } + if (i < len) + { + fputs_filtered (TYPE_FIELD_NAME (type, i), stream); + } + else + { + print_longest (stream, 'd', 0, val); + } + break; + + case TYPE_CODE_FUNC: + if (format) + { + print_scalar_formatted (valaddr + embedded_offset, type, + format, 0, stream); + break; + } + /* FIXME, we should consider, at least for ANSI C language, eliminating + the distinction made between FUNCs and POINTERs to FUNCs. */ + fprintf_filtered (stream, "{"); + type_print (type, "", stream, -1); + fprintf_filtered (stream, "} "); + /* Try to print what function it points to, and its address. */ + print_address_demangle (address, stream, demangle); + break; + + case TYPE_CODE_BOOL: + format = format ? format : output_format; + if (format) + print_scalar_formatted (valaddr + embedded_offset, type, + format, 0, stream); + else + { + val = unpack_long (type, valaddr + embedded_offset); + if (val == 0) + fputs_filtered ("FALSE", stream); + else if (val == 1) + fputs_filtered ("TRUE", stream); + else + fprintf_filtered (stream, "%ld)", (long int) val); + } + break; + + case TYPE_CODE_RANGE: + if (TYPE_LENGTH (type) == TYPE_LENGTH (TYPE_TARGET_TYPE (type))) + { + m2_val_print (TYPE_TARGET_TYPE (type), valaddr, embedded_offset, + address, stream, format, deref_ref, recurse, pretty); + break; + } + /* FIXME: create_range_type does not set the unsigned bit in a + range type (I think it probably should copy it from the target + type), so we won't print values which are too large to + fit in a signed integer correctly. */ + /* FIXME: Doesn't handle ranges of enums correctly. (Can't just + print with the target type, though, because the size of our type + and the target type might differ). */ + /* FALLTHROUGH */ + + case TYPE_CODE_INT: + format = format ? format : output_format; + if (format) + print_scalar_formatted (valaddr + embedded_offset, type, format, + 0, stream); + else + val_print_type_code_int (type, valaddr + embedded_offset, stream); + break; + + case TYPE_CODE_CHAR: + format = format ? format : output_format; + if (format) + print_scalar_formatted (valaddr + embedded_offset, type, + format, 0, stream); + else + { + val = unpack_long (type, valaddr + embedded_offset); + if (TYPE_UNSIGNED (type)) + fprintf_filtered (stream, "%u", (unsigned int) val); + else + fprintf_filtered (stream, "%d", (int) val); + fputs_filtered (" ", stream); + LA_PRINT_CHAR ((unsigned char) val, stream); + } + break; + + case TYPE_CODE_FLT: + if (format) + print_scalar_formatted (valaddr + embedded_offset, type, + format, 0, stream); + else + print_floating (valaddr + embedded_offset, type, stream); + break; + + case TYPE_CODE_METHOD: + break; + + case TYPE_CODE_BITSTRING: + case TYPE_CODE_SET: + elttype = TYPE_INDEX_TYPE (type); + CHECK_TYPEDEF (elttype); + if (TYPE_STUB (elttype)) + { + fprintf_filtered (stream, _("")); + gdb_flush (stream); + break; + } + else + { + struct type *range = elttype; + LONGEST low_bound, high_bound; + int i; + int is_bitstring = TYPE_CODE (type) == TYPE_CODE_BITSTRING; + int need_comma = 0; + + if (is_bitstring) + fputs_filtered ("B'", stream); + else + fputs_filtered ("{", stream); + + i = get_discrete_bounds (range, &low_bound, &high_bound); + maybe_bad_bstring: + if (i < 0) + { + fputs_filtered (_(""), stream); + goto done; + } + + for (i = low_bound; i <= high_bound; i++) + { + int element = value_bit_index (type, valaddr + embedded_offset, + i); + if (element < 0) + { + i = element; + goto maybe_bad_bstring; + } + if (is_bitstring) + fprintf_filtered (stream, "%d", element); + else if (element) + { + if (need_comma) + fputs_filtered (", ", stream); + print_type_scalar (range, i, stream); + need_comma = 1; + + if (i + 1 <= high_bound + && value_bit_index (type, valaddr + embedded_offset, + ++i)) + { + int j = i; + fputs_filtered ("..", stream); + while (i + 1 <= high_bound + && value_bit_index (type, + valaddr + embedded_offset, + ++i)) + j = i; + print_type_scalar (range, j, stream); + } + } + } + done: + if (is_bitstring) + fputs_filtered ("'", stream); + else + fputs_filtered ("}", stream); + } + break; + + case TYPE_CODE_VOID: + fprintf_filtered (stream, "void"); + break; + + case TYPE_CODE_ERROR: + fprintf_filtered (stream, _("")); + break; + + case TYPE_CODE_UNDEF: + /* This happens (without TYPE_FLAG_STUB set) on systems which don't use + dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar" + and no complete type for struct foo in that file. */ + fprintf_filtered (stream, _("")); + break; + + default: + error (_("Invalid m2 type code %d in symbol table."), TYPE_CODE (type)); + } + gdb_flush (stream); + return (0); } -- 2.7.4