Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 630 insertions, 0 deletions

diff --git a/gdb/ch-valprint.c b/gdb/ch-valprint.c
new file mode 100644
index 0000000..663ba64
--- /dev/null
+++ b/gdb/ch-valprint.c
@@ -0,0 +1,630 @@
+/* Support for printing Chill values for GDB, the GNU debugger.
+   Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994
+   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 "obstack.h"
+#include "symtab.h"
+#include "gdbtypes.h"
+#include "valprint.h"
+#include "expression.h"
+#include "value.h"
+#include "language.h"
+#include "demangle.h"
+#include "c-lang.h" /* For c_val_print */
+#include "typeprint.h"
+#include "ch-lang.h"
+#include "annotate.h"
+
+static void
+chill_print_value_fields PARAMS ((struct type *, char *, GDB_FILE *, int, int,
+				  enum val_prettyprint, struct type **));
+
+static void
+chill_print_type_scalar PARAMS ((struct type *, LONGEST, GDB_FILE *));
+
+static void
+chill_val_print_array_elements PARAMS ((struct type *, char *, CORE_ADDR, GDB_FILE *,
+					int, int, int, enum val_prettyprint));
+
+
+/* Print integral scalar data VAL, of type TYPE, onto stdio stream STREAM.
+   Used to print data from type structures in a specified type.  For example,
+   array bounds may be characters or booleans in some languages, and this
+   allows the ranges to be printed in their "natural" form rather than as
+   decimal integer values. */
+
+static void
+chill_print_type_scalar (type, val, stream)
+     struct type *type;
+     LONGEST val;
+     GDB_FILE *stream;
+{
+  switch (TYPE_CODE (type))
+    {
+    case TYPE_CODE_RANGE:
+      if (TYPE_TARGET_TYPE (type))
+	{
+	  chill_print_type_scalar (TYPE_TARGET_TYPE (type), val, stream);
+	  return;
+	}
+      break;
+    case TYPE_CODE_UNDEF:
+    case TYPE_CODE_PTR:
+    case TYPE_CODE_ARRAY:
+    case TYPE_CODE_STRUCT:
+    case TYPE_CODE_UNION:
+    case TYPE_CODE_ENUM:
+    case TYPE_CODE_FUNC:
+    case TYPE_CODE_INT:
+    case TYPE_CODE_FLT:
+    case TYPE_CODE_VOID:
+    case TYPE_CODE_SET:
+    case TYPE_CODE_STRING:
+    case TYPE_CODE_BITSTRING:
+    case TYPE_CODE_ERROR:
+    case TYPE_CODE_MEMBER:
+    case TYPE_CODE_METHOD:
+    case TYPE_CODE_REF:
+    case TYPE_CODE_CHAR:
+    case TYPE_CODE_BOOL:
+    case TYPE_CODE_COMPLEX:
+    case TYPE_CODE_TYPEDEF:
+    default:
+      break;
+    }
+  print_type_scalar (type, val, stream);
+}
+
+/* Print the elements of an array.
+   Similar to val_print_array_elements, but prints
+   element indexes (in Chill syntax). */
+
+static void
+chill_val_print_array_elements (type, valaddr, 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;
+{
+  unsigned int i = 0;
+  unsigned int things_printed = 0;
+  unsigned len;
+  struct type *elttype;
+  struct type *range_type = TYPE_FIELD_TYPE (type, 0);
+  struct type *index_type = TYPE_TARGET_TYPE (range_type);
+  unsigned eltlen;
+  /* Position of the array element we are examining to see
+     whether it is repeated.  */
+  unsigned int rep1;
+  /* Number of repetitions we have detected so far.  */
+  unsigned int reps;
+  LONGEST low_bound =  TYPE_FIELD_BITPOS (range_type, 0);
+      
+  elttype = check_typedef (TYPE_TARGET_TYPE (type));
+  eltlen = TYPE_LENGTH (elttype);
+  len = TYPE_LENGTH (type) / eltlen;
+
+  annotate_array_section_begin (i, elttype);
+
+  for (; i < len && things_printed < print_max; i++)
+    {
+      if (i != 0)
+	{
+	  if (prettyprint_arrays)
+	    {
+	      fprintf_filtered (stream, ",\n");
+	      print_spaces_filtered (2 + 2 * recurse, stream);
+	    }
+	  else
+	    {
+	      fprintf_filtered (stream, ", ");
+	    }
+	}
+      wrap_here (n_spaces (2 + 2 * recurse));
+
+      rep1 = i + 1;
+      reps = 1;
+      while ((rep1 < len) && 
+	     !memcmp (valaddr + i * eltlen, valaddr + rep1 * eltlen, eltlen))
+	{
+	  ++reps;
+	  ++rep1;
+	}
+
+      fputs_filtered ("(", stream);
+      chill_print_type_scalar (index_type, low_bound + i, stream);
+      if (reps > 1)
+	{
+	  fputs_filtered (":", stream);
+	  chill_print_type_scalar (index_type, low_bound + i + reps - 1,
+				   stream);
+	  fputs_filtered ("): ", stream);
+	  val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format,
+		     deref_ref, recurse + 1, pretty);
+
+	  i = rep1 - 1;
+	  things_printed += 1;
+	}
+      else
+	{
+	  fputs_filtered ("): ", stream);
+	  val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format,
+		     deref_ref, recurse + 1, pretty);
+	  annotate_elt ();
+	  things_printed++;
+	}
+    }
+  annotate_array_section_end ();
+  if (i < len)
+    {
+      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
+chill_val_print (type, valaddr, embedded_offset, address,
+                 stream, format, deref_ref, recurse, pretty)
+     struct type *type;
+     char *valaddr;
+     int embedded_offset;
+     CORE_ADDR address;
+     GDB_FILE *stream;
+     int format;
+     int deref_ref;
+     int recurse;
+     enum val_prettyprint pretty;
+{
+  LONGEST val;
+  unsigned int i = 0;		/* Number of characters printed.  */
+  struct type *elttype;
+  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)
+	{
+	  if (prettyprint_arrays)
+	    {
+	      print_spaces_filtered (2 + 2 * recurse, stream);
+	    }
+	  fprintf_filtered (stream, "[");
+	  chill_val_print_array_elements (type, valaddr, address, stream,
+					  format, deref_ref, recurse, pretty);
+	  fprintf_filtered (stream, "]");
+	}
+      else
+	{
+	  error ("unimplemented in chill_val_print; unspecified array length");
+	}
+      break;
+
+    case TYPE_CODE_INT:
+      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_CHAR:
+      format = format ? format : output_format;
+      if (format)
+	{
+	  print_scalar_formatted (valaddr, type, format, 0, stream);
+	}
+      else
+	{
+	  LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr),
+			 stream);
+	}
+      break;
+
+    case TYPE_CODE_FLT:
+      if (format)
+	{
+	  print_scalar_formatted (valaddr, type, format, 0, stream);
+	}
+      else
+	{
+	  print_floating (valaddr, type, stream);
+	}
+      break;
+
+    case TYPE_CODE_BOOL:
+      format = format ? format : output_format;
+      if (format)
+	{
+	  print_scalar_formatted (valaddr, type, format, 0, stream);
+	}
+      else
+	{
+	  /* FIXME: Why is this using builtin_type_chill_bool not type?  */
+	  val = unpack_long (builtin_type_chill_bool, valaddr);
+	  fprintf_filtered (stream, val ? "TRUE" : "FALSE");
+	}
+      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, "<incomplete type>");
+      break;
+
+    case TYPE_CODE_PTR:
+      if (format && format != 's')
+	{
+	  print_scalar_formatted (valaddr, type, format, 0, stream);
+	  break;
+	}
+      addr = unpack_pointer (type, valaddr);
+      elttype = check_typedef (TYPE_TARGET_TYPE (type));
+
+      /* We assume a NULL pointer is all zeros ... */
+      if (addr == 0)
+	{
+	  fputs_filtered ("NULL", stream);
+	  return 0;
+	}
+      
+      if (TYPE_CODE (elttype) == 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')
+	{
+	  print_address_numeric (addr, 1, 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_CHAR
+	  && (format == 0 || format == 's')
+	  && addr != 0
+	  && /* If print_max is UINT_MAX, the alloca below will fail.
+		In that case don't try to print the string.  */
+	  print_max < UINT_MAX)
+	i = val_print_string (addr, -1, TYPE_LENGTH (elttype), stream);
+
+      /* Return number of characters printed, plus one for the
+	 terminating null if we have "reached the end".  */
+      return (i + (print_max && i != print_max));
+      break;
+
+    case TYPE_CODE_STRING:
+      i = TYPE_LENGTH (type);
+      LA_PRINT_STRING (stream, valaddr, i, 1, 0);
+      /* Return number of characters printed, plus one for the terminating
+	 null if we have "reached the end".  */
+      return (i + (print_max && i != print_max));
+      break;
+
+    case TYPE_CODE_BITSTRING:
+    case TYPE_CODE_SET:
+      elttype = TYPE_INDEX_TYPE (type);
+      CHECK_TYPEDEF (elttype);
+      if (TYPE_FLAGS (elttype) & TYPE_FLAG_STUB)
+	{
+	  fprintf_filtered (stream, "<incomplete type>");
+	  gdb_flush (stream);
+	  break;
+	}
+      {
+	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 ("<error value>", stream);
+	    goto done;
+	  }
+
+	for (i = low_bound; i <= high_bound; i++)
+	  {
+	    int element = value_bit_index (type, valaddr, 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);
+		chill_print_type_scalar (range, (LONGEST) i, stream);
+		need_comma = 1;
+
+		/* Look for a continuous range of true elements. */
+		if (i+1 <= high_bound && value_bit_index (type, valaddr, ++i))
+		  {
+		    int j = i; /* j is the upper bound so far of the range */
+		    fputs_filtered (":", stream);
+		    while (i+1 <= high_bound
+			   && value_bit_index (type, valaddr, ++i))
+		      j = i;
+		    chill_print_type_scalar (range, (LONGEST) j, stream);
+		  }
+	      }
+	  }
+      done:
+	if (is_bitstring)
+	  fputs_filtered ("'", stream);
+	else
+	  fputs_filtered ("]", stream);
+      }
+      break;
+
+    case TYPE_CODE_STRUCT:
+      if (chill_varying_type (type))
+	{
+	  struct type *inner = check_typedef (TYPE_FIELD_TYPE (type, 1));
+	  long length = unpack_long (TYPE_FIELD_TYPE (type, 0), valaddr);
+	  char *data_addr = valaddr + TYPE_FIELD_BITPOS (type, 1) / 8;
+	  
+	  switch (TYPE_CODE (inner))
+	    {
+	    case TYPE_CODE_STRING:
+	      if (length > TYPE_LENGTH (type) - 2)
+		{
+		  fprintf_filtered (stream,
+				    "<dynamic length %ld > static length %d> *invalid*",
+				    length, TYPE_LENGTH (type));
+
+		  /* Don't print the string; doing so might produce a
+		     segfault.  */
+		  return length;
+		}
+	      LA_PRINT_STRING (stream, data_addr, length, 1, 0);
+	      return length;
+	    default:
+	      break;
+	    }
+	}
+      chill_print_value_fields (type, valaddr, stream, format, recurse, pretty,
+				0);
+      break;
+
+    case TYPE_CODE_REF:
+      if (addressprint)
+        {
+	  fprintf_filtered (stream, "LOC(");
+	  print_address_numeric
+	    (extract_address (valaddr, TARGET_PTR_BIT / HOST_CHAR_BIT),
+	     1,
+	     stream);
+	  fprintf_filtered (stream, ")");
+	  if (deref_ref)
+	    fputs_filtered (": ", stream);
+        }
+      /* De-reference the reference.  */
+      if (deref_ref)
+	{
+	  if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_UNDEF)
+	    {
+	      value_ptr deref_val =
+		value_at
+		  (TYPE_TARGET_TYPE (type),
+		   unpack_pointer (lookup_pointer_type (builtin_type_void),
+				   valaddr),
+		   NULL);
+	      val_print (VALUE_TYPE (deref_val),
+			 VALUE_CONTENTS (deref_val),
+                         0,
+			 VALUE_ADDRESS (deref_val), stream, format,
+			 deref_ref, recurse + 1, pretty);
+	    }
+	  else
+	    fputs_filtered ("???", stream);
+	}
+      break;
+
+    case TYPE_CODE_ENUM:
+      c_val_print (type, valaddr, 0, address, stream, format,
+		   deref_ref, recurse, pretty);
+      break;
+
+    case TYPE_CODE_RANGE:
+      if (TYPE_TARGET_TYPE (type))
+	chill_val_print (TYPE_TARGET_TYPE (type), valaddr, 0, address, stream,
+			 format, deref_ref, recurse, pretty);
+      break;
+
+    case TYPE_CODE_MEMBER:
+    case TYPE_CODE_UNION:
+    case TYPE_CODE_FUNC:
+    case TYPE_CODE_VOID:
+    case TYPE_CODE_ERROR:
+    default:
+      /* Let's defer printing to the C printer, rather than
+	 print an error message.  FIXME! */
+      c_val_print (type, valaddr, 0, address, stream, format,
+		   deref_ref, recurse, pretty);
+    }
+  gdb_flush (stream);
+  return (0);
+}
+
+/* Mutually recursive subroutines of cplus_print_value and c_val_print to
+   print out a structure's fields: cp_print_value_fields and cplus_print_value.
+
+   TYPE, VALADDR, STREAM, RECURSE, and PRETTY have the
+   same meanings as in cplus_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.  */
+
+static void
+chill_print_value_fields (type, valaddr, stream, format, recurse, pretty,
+			  dont_print)
+     struct type *type;
+     char *valaddr;
+     GDB_FILE *stream;
+     int format;
+     int recurse;
+     enum val_prettyprint pretty;
+     struct type **dont_print;
+{
+  int i, len;
+  int fields_seen = 0;
+
+  CHECK_TYPEDEF (type);
+
+  fprintf_filtered (stream, "[");
+  len = TYPE_NFIELDS (type);
+  if (len == 0)
+    {
+      fprintf_filtered (stream, "<No data fields>");
+    }
+  else
+    {
+      for (i = 0; i < len; i++)
+	{
+	  if (fields_seen)
+	    {
+	      fprintf_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));
+	    }
+	  fputs_filtered (".", stream);
+	  fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
+				   language_chill, DMGL_NO_OPTS);
+	  fputs_filtered (": ", stream);
+	  if (TYPE_FIELD_PACKED (type, i))
+	    {
+	      value_ptr v;
+
+	      /* Bitfields require special handling, especially due to byte
+		 order problems.  */
+	      v = value_from_longest (TYPE_FIELD_TYPE (type, i),
+				      unpack_field_as_long (type, valaddr, i));
+
+	      chill_val_print (TYPE_FIELD_TYPE (type, i), VALUE_CONTENTS (v), 0, 0,
+			       stream, format, 0, recurse + 1, pretty);
+	    }
+	  else
+	    {
+	      chill_val_print (TYPE_FIELD_TYPE (type, i), 
+			       valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0,
+			       0, stream, format, 0, recurse + 1, pretty);
+	    }
+	}
+      if (pretty)
+	{
+	  fprintf_filtered (stream, "\n");
+	  print_spaces_filtered (2 * recurse, stream);
+	}
+    }
+  fprintf_filtered (stream, "]");
+}
+
+int
+chill_value_print (val, stream, format, pretty)
+     value_ptr val;
+     GDB_FILE *stream;
+     int format;
+     enum val_prettyprint pretty;
+{
+  struct type *type = VALUE_TYPE (val);
+  struct type *real_type = check_typedef  (type);
+
+  /* If it is a pointer, indicate what it points to.
+
+     Print type also if it is a reference. */
+
+  if (TYPE_CODE (real_type) == TYPE_CODE_PTR ||
+      TYPE_CODE (real_type) == TYPE_CODE_REF)
+    {
+      char *valaddr = VALUE_CONTENTS (val);
+      CORE_ADDR addr = unpack_pointer (type, valaddr);
+      if (TYPE_CODE (type) != TYPE_CODE_PTR || addr != 0)
+	{
+	  int i;
+	  char *name = TYPE_NAME (type);
+	  if (name)
+	    fputs_filtered (name, stream);
+	  else if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_VOID)
+	    fputs_filtered ("PTR", stream);
+	  else
+	    {
+	      fprintf_filtered (stream, "(");
+	      type_print (type, "", stream, -1);
+	      fprintf_filtered (stream, ")");
+	    }
+	  fprintf_filtered (stream, "(");
+	  i = val_print (type, valaddr, 0, VALUE_ADDRESS (val),
+			 stream, format, 1, 0, pretty);
+	  fprintf_filtered (stream, ")");
+	  return i;
+	}
+    }
+  return (val_print (type, VALUE_CONTENTS (val), 0,
+		     VALUE_ADDRESS (val), stream, format, 1, 0, pretty));
+}
+
+