gdb: add target_ops::supports_displaced_step
[deliverable/binutils-gdb.git] / gdb / p-lang.c
index 444fb669fb34e4054c939613f180a73c4ef52e45..777f1ffe217a2c42325769983a354c86ea2cb599 100644 (file)
@@ -1,7 +1,6 @@
 /* Pascal language support routines for GDB, the GNU debugger.
 
-   Copyright (C) 2000, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
-   Free Software Foundation, Inc.
+   Copyright (C) 2000-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
 /* This file is derived from c-lang.c */
 
 #include "defs.h"
-#include "gdb_string.h"
 #include "symtab.h"
 #include "gdbtypes.h"
 #include "expression.h"
 #include "parser-defs.h"
 #include "language.h"
+#include "varobj.h"
 #include "p-lang.h"
 #include "valprint.h"
 #include "value.h"
 #include <ctype.h>
-extern void _initialize_pascal_language (void);
-
+#include "c-lang.h"
+#include "gdbarch.h"
+#include "cli/cli-style.h"
 
 /* All GPC versions until now (2007-09-27) also define a symbol called
-   '_p_initialize'. Check for the presence of this symbol first.  */
+   '_p_initialize'.  Check for the presence of this symbol first.  */
 static const char GPC_P_INITIALIZE[] = "_p_initialize";
 
 /* The name of the symbol that GPC uses as the name of the main
@@ -54,28 +53,28 @@ static const char GPC_MAIN_PROGRAM_NAME_2[] = "pascal_main_program";
    so that it finds the even if the program was compiled
    without debugging information.
    According to information supplied by Waldeck Hebisch,
-   this should work for all versions posterior to June 2000. */
+   this should work for all versions posterior to June 2000.  */
 
 const char *
 pascal_main_name (void)
 {
-  struct minimal_symbol *msym;
+  struct bound_minimal_symbol msym;
 
   msym = lookup_minimal_symbol (GPC_P_INITIALIZE, NULL, NULL);
 
   /*  If '_p_initialize' was not found, the main program is likely not
      written in Pascal.  */
-  if (msym == NULL)
+  if (msym.minsym == NULL)
     return NULL;
 
   msym = lookup_minimal_symbol (GPC_MAIN_PROGRAM_NAME_1, NULL, NULL);
-  if (msym != NULL)
+  if (msym.minsym != NULL)
     {
       return GPC_MAIN_PROGRAM_NAME_1;
     }
 
   msym = lookup_minimal_symbol (GPC_MAIN_PROGRAM_NAME_2, NULL, NULL);
-  if (msym != NULL)
+  if (msym.minsym != NULL)
     {
       return GPC_MAIN_PROGRAM_NAME_2;
     }
@@ -99,15 +98,15 @@ int
 is_pascal_string_type (struct type *type,int *length_pos,
                        int *length_size, int *string_pos,
                       struct type **char_type,
-                      char **arrayname)
+                      const char **arrayname)
 {
-  if (type != NULL && TYPE_CODE (type) == TYPE_CODE_STRUCT)
+  if (type != NULL && type->code () == TYPE_CODE_STRUCT)
     {
       /* Old Borland type pascal strings from Free Pascal Compiler.  */
       /* Two fields: length and st.  */
-      if (TYPE_NFIELDS (type) == 2
+      if (type->num_fields () == 2
          && TYPE_FIELD_NAME (type, 0)
-         && strcmp (TYPE_FIELD_NAME (type, 0), "length") == 0 
+         && strcmp (TYPE_FIELD_NAME (type, 0), "length") == 0
          && TYPE_FIELD_NAME (type, 1)
          && strcmp (TYPE_FIELD_NAME (type, 1), "st") == 0)
         {
@@ -125,7 +124,7 @@ is_pascal_string_type (struct type *type,int *length_pos,
         };
       /* GNU pascal strings.  */
       /* Three fields: Capacity, length and schema$ or _p_schema.  */
-      if (TYPE_NFIELDS (type) == 3
+      if (type->num_fields () == 3
          && TYPE_FIELD_NAME (type, 0)
          && strcmp (TYPE_FIELD_NAME (type, 0), "Capacity") == 0
          && TYPE_FIELD_NAME (type, 1)
@@ -137,12 +136,12 @@ is_pascal_string_type (struct type *type,int *length_pos,
            *length_size = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 1));
          if (string_pos)
            *string_pos = TYPE_FIELD_BITPOS (type, 2) / TARGET_CHAR_BIT;
-          /* FIXME: how can I detect wide chars in GPC ?? */
+          /* FIXME: how can I detect wide chars in GPC ??  */
           if (char_type)
            {
              *char_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 2));
 
-             if (TYPE_CODE (*char_type) == TYPE_CODE_ARRAY)
+             if ((*char_type)->code () == TYPE_CODE_ARRAY)
                *char_type = TYPE_TARGET_TYPE (*char_type);
            }
          if (arrayname)
@@ -153,11 +152,21 @@ is_pascal_string_type (struct type *type,int *length_pos,
   return 0;
 }
 
+/* This is a wrapper around IS_PASCAL_STRING_TYPE that returns true if TYPE
+   is a string.  */
+
+static bool
+pascal_is_string_type_p (struct type *type)
+{
+  return is_pascal_string_type (type, nullptr, nullptr, nullptr,
+                               nullptr, nullptr) > 0;
+}
+
 static void pascal_one_char (int, struct ui_file *, int *);
 
 /* Print the character C on STREAM as part of the contents of a literal
    string.
-   In_quotes is reset to 0 if a char is written with #4 notation */
+   In_quotes is reset to 0 if a char is written with #4 notation */
 
 static void
 pascal_one_char (int c, struct ui_file *stream, int *in_quotes)
@@ -188,7 +197,7 @@ static void pascal_emit_char (int c, struct type *type,
 
 /* 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. */
+   characters and strings is language specific.  */
 
 static void
 pascal_emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
@@ -221,7 +230,7 @@ pascal_printstr (struct ui_file *stream, struct type *type,
                 const char *encoding, int force_ellipses,
                 const struct value_print_options *options)
 {
-  enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type));
+  enum bfd_endian byte_order = type_byte_order (type);
   unsigned int i;
   unsigned int things_printed = 0;
   int in_quotes = 0;
@@ -268,7 +277,7 @@ pascal_printstr (struct ui_file *stream, struct type *type,
 
       rep1 = i + 1;
       reps = 1;
-      while (rep1 < length 
+      while (rep1 < length
             && extract_unsigned_integer (string + rep1 * width, width,
                                          byte_order) == current_char)
        {
@@ -280,14 +289,13 @@ pascal_printstr (struct ui_file *stream, struct type *type,
        {
          if (in_quotes)
            {
-             if (options->inspect_it)
-               fputs_filtered ("\\', ", stream);
-             else
-               fputs_filtered ("', ", stream);
+             fputs_filtered ("', ", stream);
              in_quotes = 0;
            }
          pascal_printchar (current_char, type, stream);
-         fprintf_filtered (stream, " <repeats %u times>", reps);
+         fprintf_filtered (stream, " %p[<repeats %u times>%p]",
+                           metadata_style.style ().ptr (),
+                           reps, nullptr);
          i = rep1 - 1;
          things_printed += options->repeat_count_threshold;
          need_comma = 1;
@@ -296,10 +304,7 @@ pascal_printstr (struct ui_file *stream, struct type *type,
        {
          if ((!in_quotes) && (PRINT_LITERAL_FORM (current_char)))
            {
-             if (options->inspect_it)
-               fputs_filtered ("\\'", stream);
-             else
-               fputs_filtered ("'", stream);
+             fputs_filtered ("'", stream);
              in_quotes = 1;
            }
          pascal_one_char (current_char, stream, &in_quotes);
@@ -309,12 +314,7 @@ pascal_printstr (struct ui_file *stream, struct type *type,
 
   /* Terminate the quotes if necessary.  */
   if (in_quotes)
-    {
-      if (options->inspect_it)
-       fputs_filtered ("\\'", stream);
-      else
-       fputs_filtered ("'", stream);
-    }
+    fputs_filtered ("'", stream);
 
   if (force_ellipses || i < length)
     fputs_filtered ("...", stream);
@@ -351,7 +351,7 @@ const struct op_print pascal_op_print_tab[] =
   {"^", UNOP_IND, PREC_SUFFIX, 1},
   {"@", UNOP_ADDR, PREC_PREFIX, 0},
   {"sizeof", UNOP_SIZEOF, PREC_PREFIX, 0},
-  {NULL, 0, 0, 0}
+  {NULL, OP_NULL, PREC_PREFIX, 0}
 };
 \f
 enum pascal_primitive_types {
@@ -375,95 +375,117 @@ enum pascal_primitive_types {
   nr_pascal_primitive_types
 };
 
-static void
-pascal_language_arch_info (struct gdbarch *gdbarch,
-                          struct language_arch_info *lai)
+static const char *p_extensions[] =
 {
-  const struct builtin_type *builtin = builtin_type (gdbarch);
+  ".pas", ".p", ".pp", NULL
+};
 
-  lai->string_char_type = builtin->builtin_char;
-  lai->primitive_type_vector
-    = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_pascal_primitive_types + 1,
-                              struct type *);
-  lai->primitive_type_vector [pascal_primitive_type_int]
-    = builtin->builtin_int;
-  lai->primitive_type_vector [pascal_primitive_type_long]
-    = builtin->builtin_long;
-  lai->primitive_type_vector [pascal_primitive_type_short]
-    = builtin->builtin_short;
-  lai->primitive_type_vector [pascal_primitive_type_char]
-    = builtin->builtin_char;
-  lai->primitive_type_vector [pascal_primitive_type_float]
-    = builtin->builtin_float;
-  lai->primitive_type_vector [pascal_primitive_type_double]
-    = builtin->builtin_double;
-  lai->primitive_type_vector [pascal_primitive_type_void]
-    = builtin->builtin_void;
-  lai->primitive_type_vector [pascal_primitive_type_long_long]
-    = builtin->builtin_long_long;
-  lai->primitive_type_vector [pascal_primitive_type_signed_char]
-    = builtin->builtin_signed_char;
-  lai->primitive_type_vector [pascal_primitive_type_unsigned_char]
-    = builtin->builtin_unsigned_char;
-  lai->primitive_type_vector [pascal_primitive_type_unsigned_short]
-    = builtin->builtin_unsigned_short;
-  lai->primitive_type_vector [pascal_primitive_type_unsigned_int]
-    = builtin->builtin_unsigned_int;
-  lai->primitive_type_vector [pascal_primitive_type_unsigned_long]
-    = builtin->builtin_unsigned_long;
-  lai->primitive_type_vector [pascal_primitive_type_unsigned_long_long]
-    = builtin->builtin_unsigned_long_long;
-  lai->primitive_type_vector [pascal_primitive_type_long_double]
-    = builtin->builtin_long_double;
-  lai->primitive_type_vector [pascal_primitive_type_complex]
-    = builtin->builtin_complex;
-  lai->primitive_type_vector [pascal_primitive_type_double_complex]
-    = builtin->builtin_double_complex;
-
-  lai->bool_type_symbol = "boolean";
-  lai->bool_type_default = builtin->builtin_bool;
-}
+/* Constant data representing the Pascal language.  */
 
-const struct language_defn pascal_language_defn =
+extern const struct language_data pascal_language_data =
 {
   "pascal",                    /* Language name */
+  "Pascal",
   language_pascal,
   range_check_on,
-  type_check_on,
   case_sensitive_on,
   array_row_major,
   macro_expansion_no,
+  p_extensions,
   &exp_descriptor_standard,
   pascal_parse,
-  pascal_error,
   null_post_parser,
   pascal_printchar,            /* Print a character constant */
   pascal_printstr,             /* Function to print string constant */
   pascal_emit_char,            /* Print a single char */
-  pascal_print_type,           /* Print a type using appropriate syntax */
   pascal_print_typedef,                /* Print a typedef using appropriate syntax */
-  pascal_val_print,            /* Print a value using appropriate syntax */
+  pascal_value_print_inner,    /* la_value_print_inner */
   pascal_value_print,          /* Print a top-level value */
-  NULL,                                /* Language specific skip_trampoline */
   "this",                      /* name_of_this */
+  false,                       /* la_store_sym_names_in_linkage_form_p */
   basic_lookup_symbol_nonlocal,        /* lookup_symbol_nonlocal */
-  basic_lookup_transparent_type,/* lookup_transparent_type */
-  NULL,                                /* Language specific symbol demangler */
   NULL,                                /* Language specific class_name_from_physname */
   pascal_op_print_tab,         /* expression operators for printing */
   1,                           /* c-style arrays */
   0,                           /* String lower bound */
   default_word_break_characters,
-  default_make_symbol_completion_list,
-  pascal_language_arch_info,
-  default_print_array_index,
-  default_pass_by_reference,
-  default_get_string,
-  LANG_MAGIC
+  default_collect_symbol_completion_matches,
+  c_watch_location_expression,
+  NULL,                                /* la_compare_symbol_for_completion */
+  &default_varobj_ops,
+  NULL,
+  pascal_is_string_type_p,
+  "{...}"                      /* la_struct_too_deep_ellipsis */
 };
 
-void
-_initialize_pascal_language (void)
+/* Class representing the Pascal language.  */
+
+class pascal_language : public language_defn
 {
-  add_language (&pascal_language_defn);
-}
+public:
+  pascal_language ()
+    : language_defn (language_pascal, pascal_language_data)
+  { /* Nothing.  */ }
+
+  /* See language.h.  */
+  void language_arch_info (struct gdbarch *gdbarch,
+                          struct language_arch_info *lai) const override
+  {
+    const struct builtin_type *builtin = builtin_type (gdbarch);
+
+    lai->string_char_type = builtin->builtin_char;
+    lai->primitive_type_vector
+      = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_pascal_primitive_types + 1,
+                              struct type *);
+    lai->primitive_type_vector [pascal_primitive_type_int]
+      = builtin->builtin_int;
+    lai->primitive_type_vector [pascal_primitive_type_long]
+      = builtin->builtin_long;
+    lai->primitive_type_vector [pascal_primitive_type_short]
+      = builtin->builtin_short;
+    lai->primitive_type_vector [pascal_primitive_type_char]
+      = builtin->builtin_char;
+    lai->primitive_type_vector [pascal_primitive_type_float]
+      = builtin->builtin_float;
+    lai->primitive_type_vector [pascal_primitive_type_double]
+      = builtin->builtin_double;
+    lai->primitive_type_vector [pascal_primitive_type_void]
+      = builtin->builtin_void;
+    lai->primitive_type_vector [pascal_primitive_type_long_long]
+      = builtin->builtin_long_long;
+    lai->primitive_type_vector [pascal_primitive_type_signed_char]
+      = builtin->builtin_signed_char;
+    lai->primitive_type_vector [pascal_primitive_type_unsigned_char]
+      = builtin->builtin_unsigned_char;
+    lai->primitive_type_vector [pascal_primitive_type_unsigned_short]
+      = builtin->builtin_unsigned_short;
+    lai->primitive_type_vector [pascal_primitive_type_unsigned_int]
+      = builtin->builtin_unsigned_int;
+    lai->primitive_type_vector [pascal_primitive_type_unsigned_long]
+      = builtin->builtin_unsigned_long;
+    lai->primitive_type_vector [pascal_primitive_type_unsigned_long_long]
+      = builtin->builtin_unsigned_long_long;
+    lai->primitive_type_vector [pascal_primitive_type_long_double]
+      = builtin->builtin_long_double;
+    lai->primitive_type_vector [pascal_primitive_type_complex]
+      = builtin->builtin_complex;
+    lai->primitive_type_vector [pascal_primitive_type_double_complex]
+      = builtin->builtin_double_complex;
+
+    lai->bool_type_symbol = "boolean";
+    lai->bool_type_default = builtin->builtin_bool;
+  }
+
+  /* See language.h.  */
+
+  void print_type (struct type *type, const char *varstring,
+                  struct ui_file *stream, int show, int level,
+                  const struct type_print_options *flags) const override
+  {
+    pascal_print_type (type, varstring, stream, show, level, flags);
+  }
+};
+
+/* Single instance of the Pascal language class.  */
+
+static pascal_language pascal_language_defn;
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