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- /* Symbol table lookup for the GNU debugger, GDB.
- Copyright (C) 1986, 1987, 1988 Free Software Foundation, Inc.
-
- GDB is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY. No author or distributor accepts responsibility to anyone
- for the consequences of using it or for whether it serves any
- particular purpose or works at all, unless he says so in writing.
- Refer to the GDB General Public License for full details.
-
- Everyone is granted permission to copy, modify and redistribute GDB,
- but only under the conditions described in the GDB General Public
- License. A copy of this license is supposed to have been given to you
- along with GDB so you can know your rights and responsibilities. It
- should be in a file named COPYING. Among other things, the copyright
- notice and this notice must be preserved on all copies.
-
- In other words, go ahead and share GDB, but don't try to stop
- anyone else from sharing it farther. Help stamp out software hoarding!
- */
-
- #include "defs.h"
- #include "symtab.h"
- #include "param.h"
-
- #include <stdio.h>
- #include <obstack.h>
-
- /* Allocate an obstack to hold objects that should be freed
- when we load a new symbol table.
- This includes the symbols made by dbxread
- and the types that are not permanent. */
-
- struct obstack obstack1;
-
- struct obstack *symbol_obstack = &obstack1;
-
- /* These variables point to the objects
- representing the predefined C data types. */
-
- struct type *builtin_type_void;
- struct type *builtin_type_char;
- struct type *builtin_type_short;
- struct type *builtin_type_int;
- struct type *builtin_type_long;
- struct type *builtin_type_unsigned_char;
- struct type *builtin_type_unsigned_short;
- struct type *builtin_type_unsigned_int;
- struct type *builtin_type_unsigned_long;
- struct type *builtin_type_float;
- struct type *builtin_type_double;
-
- #ifdef atarist
- extern int gcc_mshort;
- #endif
-
- /* Lookup the symbol table of a source file named NAME. Try a couple
- of variations if the first lookup doesn't work. */
-
- static struct symtab *
- lookup_symtab_1 (name)
- char *name;
- {
- register struct symtab *s;
- register char *copy;
- register char *slash;
- extern char *strchr();
-
- for (s = symtab_list; s; s = s->next)
- if (!strcmp (name, s->filename))
- return s;
-
- if(!(slash = strchr (name, '/')))
- slash = strchr (name, '\\');
-
- if (!slash)
- {
- int len = strlen(name);
-
- for (s = symtab_list; s; s = s->next)
- {
- int l = strlen (s->filename);
-
- if (s->filename[l - len -1] == *slash
- && !strcmp (s->filename + l - len, name))
- return s;
- }
- }
-
- return 0;
- }
-
- struct symtab *
- lookup_symtab (name)
- char *name;
- {
- register struct symtab *s;
- register char *copy;
-
- s = lookup_symtab_1 (name);
- if (s) return s;
-
- /* If name not found as specified, see if adding ".c" helps. */
-
- copy = (char *) alloca (strlen (name) + 3);
- strcpy (copy, name);
- strcat (copy, ".c");
- s = lookup_symtab_1 (copy);
- if (s) return s;
-
- /* We didn't find anything; die. */
- return 0;
- }
-
- /* Lookup a typedef or primitive type named NAME,
- visible in lexical block BLOCK.
- If NOERR is nonzero, return zero if NAME is not suitably defined. */
-
- struct type *
- lookup_typename (name, block, noerr)
- char *name;
- struct block *block;
- int noerr;
- {
- register struct symbol *sym = lookup_symbol (name, block, VAR_NAMESPACE);
- if (sym == 0 || SYMBOL_CLASS (sym) != LOC_TYPEDEF)
- {
- if (!strcmp (name, "int"))
- #ifdef atarist
- if (gcc_mshort)
- return builtin_type_short;
- else
- #endif
- return builtin_type_int;
- if (!strcmp (name, "long"))
- return builtin_type_long;
- if (!strcmp (name, "short"))
- return builtin_type_short;
- if (!strcmp (name, "char"))
- return builtin_type_char;
- if (!strcmp (name, "float"))
- return builtin_type_float;
- if (!strcmp (name, "double"))
- return builtin_type_double;
- if (!strcmp (name, "void"))
- return builtin_type_void;
-
- if (noerr)
- return 0;
- error ("No type named %s.", name);
- }
- return SYMBOL_TYPE (sym);
- }
-
- struct type *
- lookup_unsigned_typename (name)
- char *name;
- {
- if (!strcmp (name, "int"))
- #ifdef atarist
- if (gcc_mshort)
- return builtin_type_unsigned_short;
- else
- #endif
- return builtin_type_unsigned_int;
- if (!strcmp (name, "long"))
- return builtin_type_unsigned_long;
- if (!strcmp (name, "short"))
- return builtin_type_unsigned_short;
- if (!strcmp (name, "char"))
- return builtin_type_unsigned_char;
- error ("No type named unsigned %s.", name);
- }
-
- /* Lookup a structure type named "struct NAME",
- visible in lexical block BLOCK. */
-
- struct type *
- lookup_struct (name, block)
- char *name;
- struct block *block;
- {
- register struct symbol *sym = lookup_symbol (name, block, STRUCT_NAMESPACE);
- if (sym == 0)
- error ("No struct type named %s.", name);
- if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT)
- error ("This context has union or enum %s, not a struct.", name);
- return SYMBOL_TYPE (sym);
- }
-
- /* Lookup a union type named "union NAME",
- visible in lexical block BLOCK. */
-
- struct type *
- lookup_union (name, block)
- char *name;
- struct block *block;
- {
- register struct symbol *sym = lookup_symbol (name, block, STRUCT_NAMESPACE);
- if (sym == 0)
- error ("No union type named %s.", name);
- if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_UNION)
- error ("This context has struct or enum %s, not a union.", name);
- return SYMBOL_TYPE (sym);
- }
-
- /* Lookup an enum type named "enum NAME",
- visible in lexical block BLOCK. */
-
- struct type *
- lookup_enum (name, block)
- char *name;
- struct block *block;
- {
- register struct symbol *sym = lookup_symbol (name, block, STRUCT_NAMESPACE);
- if (sym == 0)
- error ("No enum type named %s.", name);
- if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_ENUM)
- error ("This context has struct or union %s, not an enum.", name);
- return SYMBOL_TYPE (sym);
- }
-
- /* Given a type TYPE, return a type of pointers to that type.
- May need to construct such a type if this is the first use. */
-
- struct type *
- lookup_pointer_type (type)
- struct type *type;
- {
- register struct type *ptype = TYPE_POINTER_TYPE (type);
- if (ptype) return ptype;
-
- /* This is the first time anyone wanted a pointer to a TYPE. */
- if (TYPE_FLAGS (type) & TYPE_FLAG_PERM)
- ptype = (struct type *) xmalloc (sizeof (struct type));
- else
- ptype = (struct type *) obstack_alloc (symbol_obstack,
- sizeof (struct type));
-
- bzero (ptype, sizeof (struct type));
- TYPE_TARGET_TYPE (ptype) = type;
- TYPE_POINTER_TYPE (type) = ptype;
- /* New type is permanent if type pointed to is permanent. */
- if (TYPE_FLAGS (type) & TYPE_FLAG_PERM)
- TYPE_FLAGS (ptype) |= TYPE_FLAG_PERM;
- /* We assume the machine has only one representation for pointers! */
- TYPE_LENGTH (ptype) = sizeof (char *);
- TYPE_CODE (ptype) = TYPE_CODE_PTR;
- return ptype;
- }
-
- /* Given a type TYPE, return a type of functions that return that type.
- May need to construct such a type if this is the first use. */
-
- struct type *
- lookup_function_type (type)
- struct type *type;
- {
- register struct type *ptype = TYPE_FUNCTION_TYPE (type);
- if (ptype) return ptype;
-
- /* This is the first time anyone wanted a function returning a TYPE. */
- if (TYPE_FLAGS (type) & TYPE_FLAG_PERM)
- ptype = (struct type *) xmalloc (sizeof (struct type));
- else
- ptype = (struct type *) obstack_alloc (symbol_obstack,
- sizeof (struct type));
-
- bzero (ptype, sizeof (struct type));
- TYPE_TARGET_TYPE (ptype) = type;
- TYPE_FUNCTION_TYPE (type) = ptype;
- /* New type is permanent if type returned is permanent. */
- if (TYPE_FLAGS (type) & TYPE_FLAG_PERM)
- TYPE_FLAGS (ptype) |= TYPE_FLAG_PERM;
- TYPE_LENGTH (ptype) = 1;
- TYPE_CODE (ptype) = TYPE_CODE_FUNC;
- TYPE_NFIELDS (ptype) = 0;
- return ptype;
- }
-
- #if 0
- /* Smash TYPE to be a type of pointers to TO_TYPE.
- If TO_TYPE is not permanent and has no pointer-type yet,
- record TYPE as its pointer-type. */
-
- void
- smash_to_pointer_type (type, to_type)
- struct type *type, *to_type;
- {
- int type_permanent = (TYPE_FLAGS (type) & TYPE_FLAG_PERM);
-
- bzero (type, sizeof (struct type));
- TYPE_TARGET_TYPE (type) = to_type;
- /* We assume the machine has only one representation for pointers! */
- TYPE_LENGTH (type) = sizeof (char *);
- TYPE_CODE (type) = TYPE_CODE_PTR;
-
- if (type_permanent)
- TYPE_FLAGS (type) |= TYPE_FLAG_PERM;
-
- if (TYPE_POINTER_TYPE (to_type) == 0
- && (!(TYPE_FLAGS (to_type) & TYPE_FLAG_PERM)
- || type_permanent))
- {
- TYPE_POINTER_TYPE (to_type) = type;
- }
- }
-
- /* Smash TYPE to be a type of functions returning TO_TYPE.
- If TO_TYPE is not permanent and has no function-type yet,
- record TYPE as its function-type. */
-
- void
- smash_to_function_type (type, to_type)
- struct type *type, *to_type;
- {
- int type_permanent = (TYPE_FLAGS (type) & TYPE_FLAG_PERM);
-
- bzero (type, sizeof (struct type));
- TYPE_TARGET_TYPE (type) = to_type;
- TYPE_LENGTH (type) = 1;
- TYPE_CODE (type) = TYPE_CODE_FUNC;
- TYPE_NFIELDS (type) = 0;
-
- if (type_permanent)
- TYPE_FLAGS (type) |= TYPE_FLAG_PERM;
-
- if (TYPE_FUNCTION_TYPE (to_type) == 0
- && (!(TYPE_FLAGS (to_type) & TYPE_FLAG_PERM)
- || type_permanent))
- {
- TYPE_FUNCTION_TYPE (to_type) = type;
- }
- }
- #endif
-
- static struct symbol *lookup_block_symbol ();
- static int lookup_misc_func ();
-
-
- /* Find the definition for a specified symbol name NAME
- in namespace NAMESPACE, visible from lexical block BLOCK.
- Returns the struct symbol pointer, or zero if no symbol is found. */
-
- struct symbol *
- lookup_symbol (name, block, namespace)
- char *name;
- register struct block *block;
- enum namespace namespace;
- {
- register int i, n;
- register struct symbol *sym;
- register struct symtab *s;
- struct blockvector *bv;
-
- /* Search specified block and its superiors. */
-
- while (block != 0)
- {
- sym = lookup_block_symbol (block, name, namespace);
- if (sym) return sym;
- block = BLOCK_SUPERBLOCK (block);
- }
-
- /* Now search all symtabs' global blocks. */
-
- for (s = symtab_list; s; s = s->next)
- {
- bv = BLOCKVECTOR (s);
- block = BLOCKVECTOR_BLOCK (bv, 0);
- sym = lookup_block_symbol (block, name, namespace);
- if (sym) return sym;
- }
-
- /* Now search all symtabs' per-file blocks.
- Not strictly correct, but more useful than an error. */
-
- for (s = symtab_list; s; s = s->next)
- {
- bv = BLOCKVECTOR (s);
- block = BLOCKVECTOR_BLOCK (bv, 1);
- sym = lookup_block_symbol (block, name, namespace);
- if (sym) return sym;
- }
- return 0;
- }
-
- /* Look for a symbol in block BLOCK. */
-
- static struct symbol *
- lookup_block_symbol (block, name, namespace)
- register struct block *block;
- char *name;
- enum namespace namespace;
- {
- register int bot, top, inc;
- register struct symbol *sym, *parameter_sym;
-
- top = BLOCK_NSYMS (block);
- bot = 0;
-
- /* If the blocks's symbols were sorted, start with a binary search. */
-
- if (BLOCK_SHOULD_SORT (block))
- {
- /* First, advance BOT to not far before
- the first symbol whose name is NAME. */
-
- while (1)
- {
- inc = (top - bot + 1);
- /* No need to keep binary searching for the last few bits worth. */
- if (inc < 4)
- break;
- inc = (inc >> 1) + bot;
- sym = BLOCK_SYM (block, inc);
- if (SYMBOL_NAME (sym)[0] < name[0])
- bot = inc;
- else if (SYMBOL_NAME (sym)[0] > name[0])
- top = inc;
- else if (strcmp (SYMBOL_NAME (sym), name) < 0)
- bot = inc;
- else
- top = inc;
- }
-
- /* Now scan forward until we run out of symbols,
- find one whose name is greater than NAME,
- or find one we want.
- If there is more than one symbol with the right name and namespace,
- we return the first one. dbxread.c is careful to make sure
- that if one is a register then it comes first. */
-
- top = BLOCK_NSYMS (block);
- while (bot < top)
- {
- sym = BLOCK_SYM (block, bot);
- inc = SYMBOL_NAME (sym)[0] - name[0];
- if (inc == 0)
- inc = strcmp (SYMBOL_NAME (sym), name);
- if (inc == 0 && SYMBOL_NAMESPACE (sym) == namespace)
- return sym;
- if (inc > 0)
- return 0;
- bot++;
- }
- return 0;
- }
-
- /* Here if block isn't sorted.
- This loop is equivalent to the loop above,
- but hacked greatly for speed.
-
- Note that parameter symbols do not always show up last in the
- list; this loop makes sure to take anything else other than
- parameter symbols first; it only uses parameter symbols as a
- last resort. Note that this only takes up extra computation
- time on a match. */
-
- parameter_sym = (struct symbol *) 0;
- top = BLOCK_NSYMS (block);
- inc = name[0];
- while (bot < top)
- {
- sym = BLOCK_SYM (block, bot);
- if (SYMBOL_NAME (sym)[0] == inc
- && !strcmp (SYMBOL_NAME (sym), name)
- && SYMBOL_NAMESPACE (sym) == namespace)
- {
- if (SYMBOL_CLASS (sym) == LOC_ARG
- #if 0
- || SYMBOL_CLASS (sym) == LOC_REF_ARG
- || SYMBOL_CLASS (sym) == LOC_REGPARM
- #endif
- )
- parameter_sym = sym;
- else
- return sym;
- }
- bot++;
- }
- return parameter_sym; /* Will be 0 if not found. */
- }
-
- /* Return the symbol for the function which contains a specified
- lexical block, described by a struct block BL. */
-
- struct symbol *
- block_function (bl)
- struct block *bl;
- {
- while (BLOCK_FUNCTION (bl) == 0 && BLOCK_SUPERBLOCK (bl) != 0)
- bl = BLOCK_SUPERBLOCK (bl);
-
- return BLOCK_FUNCTION (bl);
- }
-
- /* Subroutine of find_pc_line */
-
- static struct symtab *
- find_pc_symtab (pc)
- register CORE_ADDR pc;
- {
- register struct block *b;
- struct blockvector *bv;
- register struct symtab *s;
-
- /* Search all symtabs for one whose file contains our pc */
-
- for (s = symtab_list; s; s = s->next)
- {
- bv = BLOCKVECTOR (s);
- b = BLOCKVECTOR_BLOCK (bv, 0);
- if (BLOCK_START (b) <= pc
- && BLOCK_END (b) > pc)
- break;
- }
- return s;
- }
-
- /* Find the source file and line number for a given PC value.
- Return a structure containing a symtab pointer, a line number,
- and a pc range for the entire source line.
- The value's .pc field is NOT the specified pc.
- NOTCURRENT nonzero means, if specified pc is on a line boundary,
- use the line that ends there. Otherwise, in that case, the line
- that begins there is used. */
-
- struct symtab_and_line
- find_pc_line (pc, notcurrent)
- CORE_ADDR pc;
- int notcurrent;
- {
- struct symtab *s;
- register struct linetable *l;
- register int len;
- register int i;
- register struct linetable_entry *item;
- struct symtab_and_line value;
- struct blockvector *bv;
-
- /* Info on best line seen so far, and where it starts, and its file. */
-
- int best_line = 0;
- CORE_ADDR best_pc = 0;
- CORE_ADDR best_end = 0;
- struct symtab *best_symtab = 0;
-
- /* Store here the first line number
- of a file which contains the line at the smallest pc after PC.
- If we don't find a line whose range contains PC,
- we will use a line one less than this,
- with a range from the start of that file to the first line's pc. */
- int alt_line = 0;
- CORE_ADDR alt_pc = 0;
- struct symtab *alt_symtab = 0;
-
- /* Info on best line seen in this file. */
-
- int prev_line;
- CORE_ADDR prev_pc;
-
- /* Info on first line of this file. */
-
- int first_line;
- CORE_ADDR first_pc;
-
- /* If this pc is not from the current frame,
- it is the address of the end of a call instruction.
- Quite likely that is the start of the following statement.
- But what we want is the statement containing the instruction.
- Fudge the pc to make sure we get that. */
-
- if (notcurrent) pc -= 1;
-
- s = find_pc_symtab (pc);
- if (s == 0)
- {
- value.symtab = 0;
- value.line = 0;
- value.pc = pc;
- value.end = 0;
- return value;
- }
-
- bv = BLOCKVECTOR (s);
-
- /* Look at all the symtabs that share this blockvector.
- They all have the same apriori range, that we found was right;
- but they have different line tables. */
-
- for (; s && BLOCKVECTOR (s) == bv; s = s->next)
- {
- /* Find the best line in this symtab. */
- l = LINETABLE (s);
- len = l->nitems;
- prev_line = -1;
- first_line = -1;
- for (i = 0; i < len; i++)
- {
- item = &(l->item[i]);
-
- if (first_line < 0)
- {
- first_line = item->line;
- first_pc = item->pc;
- }
- /* Return the last line that did not start after PC. */
- if (pc >= item->pc)
- {
- prev_line = item->line;
- prev_pc = item->pc;
- }
- else
- break;
- }
-
- /* Is this file's best line closer than the best in the other files?
- If so, record this file, and its best line, as best so far. */
- if (prev_line >= 0 && prev_pc > best_pc)
- {
- best_pc = prev_pc;
- best_line = prev_line;
- best_symtab = s;
- if (i < len)
- best_end = item->pc;
- else
- best_end = 0;
- }
- /* Is this file's first line closer than the first lines of other files?
- If so, record this file, and its first line, as best alternate. */
- if (first_line >= 0 && first_pc > pc
- && (alt_pc == 0 || first_pc < alt_pc))
- {
- alt_pc = first_pc;
- alt_line = first_line;
- alt_symtab = s;
- }
- }
- if (best_symtab == 0)
- {
- value.symtab = alt_symtab;
- value.line = alt_line - 1;
- value.pc = BLOCK_END (BLOCKVECTOR_BLOCK (bv, 0));
- value.end = alt_pc;
- }
- else
- {
- value.symtab = best_symtab;
- value.line = best_line;
- value.pc = best_pc;
- value.end = (best_end ? best_end
- : (alt_pc ? alt_pc
- : BLOCK_END (BLOCKVECTOR_BLOCK (bv, 0))));
- }
- return value;
- }
-
- static int find_line_common ();
-
- /* Find the PC value for a given source file and line number.
- Returns zero for invalid line number.
- The source file is specified with a struct symtab. */
-
- CORE_ADDR
- find_line_pc (symtab, line)
- struct symtab *symtab;
- int line;
- {
- register struct linetable *l;
- register int Index;
- int dummy;
-
- if (symtab == 0)
- return 0;
- l = LINETABLE (symtab);
- Index = find_line_common(l, line, &dummy);
- return (Index >= 0) ? l->item[Index].pc : 0;
- }
-
- /* Find the range of pc values in a line.
- Store the starting pc of the line into *STARTPTR
- and the ending pc (start of next line) into *ENDPTR.
- Returns 1 to indicate success.
- Returns 0 if could not find the specified line. */
-
- int
- find_line_pc_range (symtab, thisline, startptr, endptr)
- struct symtab *symtab;
- int thisline;
- CORE_ADDR *startptr, *endptr;
- {
- register struct linetable *l;
- register int Index;
- int exact_match; /* did we get an exact linenumber match */
- register CORE_ADDR prev_pc;
- CORE_ADDR last_pc;
-
- if (symtab == 0)
- return 0;
-
- l = LINETABLE (symtab);
- Index = find_line_common (l, thisline, &exact_match);
- if (Index >= 0)
- {
- *startptr = l->item[Index].pc;
- /* If we have not seen an entry for the specified line,
- assume that means the specified line has zero bytes. */
- if (!exact_match || Index == l->nitems-1)
- *endptr = *startptr;
- else
- /* Perhaps the following entry is for the following line.
- It's worth a try. */
- if (Index+1 < l->nitems && l->item[Index+1].line == thisline + 1)
- *endptr = l->item[Index+1].pc;
- else
- *endptr = find_line_pc (symtab, thisline+1);
- return 1;
- }
-
- return 0;
- }
-
- /* Given a line table and a line number, return the index into the line
- table for the pc of the nearest line whose number is >= the specified one.
- Return 0 if none is found. The value is never zero is it is an index.
-
- Set *EXACT_MATCH nonzero if the value returned is an exact match. */
-
- static int
- find_line_common (l, lineno, exact_match)
- register struct linetable *l;
- register int lineno;
- int *exact_match;
- {
- register int i;
- register int len;
-
- /* BEST is the smallest linenumber > LINENO so far seen,
- or 0 if none has been seen so far.
- BEST_INDEX identifies the item for it. */
-
- int best_index = -1;
- int best = 0;
-
- int nextline = -1;
-
- if (lineno <= 0)
- return -1;
-
- len = l->nitems;
- for (i = 0; i < len; i++)
- {
- register struct linetable_entry *item = &(l->item[i]);
-
- if (item->line == lineno)
- {
- *exact_match = 1;
- return i;
- }
-
- if (item->line > lineno && (best == 0 || item->line < best))
- {
- best = item->line;
- best_index = i;
- }
- }
-
- /* If we got here, we didn't get an exact match. */
-
- *exact_match = 0;
- return best_index;
- }
-
- int
- find_pc_line_pc_range (pc, startptr, endptr)
- CORE_ADDR pc;
- CORE_ADDR *startptr, *endptr;
- {
- struct symtab_and_line sal;
- sal = find_pc_line (pc, 0);
- *startptr = sal.pc;
- *endptr = sal.end;
- return sal.symtab != 0;
- }
-
- /* Parse a string that specifies a line number.
- Pass the address of a char * variable; that variable will be
- advanced over the characters actually parsed.
-
- The string can be:
-
- LINENUM -- that line number in current file. PC returned is 0.
- FILE:LINENUM -- that line in that file. PC returned is 0.
- FUNCTION -- line number of openbrace of that function.
- PC returned is the start of the function.
- FILE:FUNCTION -- likewise, but prefer functions in that file.
- *EXPR -- line in which address EXPR appears.
-
- FUNCTION may be an undebuggable function found in misc_function_vector.
-
- If the argument FUNFIRSTLINE is nonzero, we want the first line
- of real code inside a function when a function is specified.
-
- DEFAULT_SYMTAB specifies the file to use if none is specified.
- It defaults to current_source_symtab.
- DEFAULT_LINE specifies the line number to use for relative
- line numbers (that start with signs). Defaults to current_source_line.
-
- Note that it is possible to return zero for the symtab
- if no file is validly specified. Callers must check that.
- Also, the line number returned may be invalid. */
-
- struct symtab_and_line
- decode_line_1 (argptr, funfirstline, default_symtab, default_line)
- char **argptr;
- int funfirstline;
- struct symtab *default_symtab;
- int default_line;
- {
- struct symtab_and_line value;
- register char *p, *p1;
- register struct symtab *s;
- register struct symbol *sym;
- register CORE_ADDR pc;
- register int i;
- char *copy;
-
- /* Defaults have defaults. */
-
- if (default_symtab == 0)
- {
- default_symtab = current_source_symtab;
- default_line = current_source_line;
- }
-
- /* See if arg is *PC */
-
- if (**argptr == '*')
- {
- (*argptr)++;
- pc = parse_and_eval_address_1 (argptr);
- value = find_pc_line (pc, 0);
- value.pc = pc;
- return value;
- }
-
- /* Maybe arg is FILE : LINENUM or FILE : FUNCTION */
-
- s = 0;
-
- for (p = *argptr; *p; p++)
- {
- if (p[0] == ':' || p[0] == ' ' || p[0] == '\t')
- break;
- }
- while (p[0] == ' ' || p[0] == '\t') p++;
-
- if (p[0] == ':')
- {
- /* Extract the file name. */
- p1 = p;
- while (p != *argptr && p[-1] == ' ') --p;
- copy = (char *) alloca (p - *argptr + 1);
- bcopy (*argptr, copy, p - *argptr);
- copy[p - *argptr] = 0;
-
- /* Find that file's data. */
- s = lookup_symtab (copy);
- if (s == 0)
- {
- if (symtab_list == 0)
- error ("No symbol table is loaded. Use the \"symbol-file\" command.");
- error ("No source file named %s.", copy);
- }
-
- /* Discard the file name from the arg. */
- p = p1 + 1;
- while (*p == ' ' || *p == '\t') p++;
- *argptr = p;
- }
-
- /* S is specified file's symtab, or 0 if no file specified.
- arg no longer contains the file name. */
-
- /* Check whether arg is all digits (and sign) */
-
- p = *argptr;
- if (*p == '-' || *p == '+') p++;
- while (*p >= '0' && *p <= '9')
- p++;
-
- if (p != *argptr && (*p == 0 || *p == ' ' || *p == '\t' || *p == ','))
- {
- /* We found a token consisting of all digits -- at least one digit. */
- enum sign {none, plus, minus} sign = none;
-
- /* This is where we need to make sure that we have good defaults.
- We must guarrantee that this section of code is never executed
- when we are called with just a function name, since
- select_source_symtab calls us with such an argument */
-
- if (s == 0 && default_symtab == 0)
- {
- if (symtab_list == 0)
- error ("No symbol table is loaded. Use the \"symbol-file\" command.");
- /* select_source_symtab (0); */
- default_symtab = current_source_symtab;
- default_line = current_source_line;
- }
- if (**argptr == '+')
- sign = plus, (*argptr)++;
- else if (**argptr == '-')
- sign = minus, (*argptr)++;
- value.line = atoi (*argptr);
- switch (sign)
- {
- case plus:
- if (p == *argptr)
- value.line = 5;
- if (s == 0)
- value.line = default_line + value.line;
- break;
- case minus:
- if (p == *argptr)
- value.line = 15;
- if (s == 0)
- value.line = default_line - value.line;
- else
- value.line = 1;
- break;
- }
-
- while (*p == ' ' || *p == '\t') p++;
- *argptr = p;
- if (s == 0)
- s = default_symtab;
- value.symtab = s;
- value.pc = 0;
- return value;
- }
-
- /* Arg token is not digits => try it as a function name
- Find the next token (everything up to end or next whitespace). */
- p = *argptr;
- while (*p && *p != ' ' && *p != '\t' && *p != ',') p++;
- copy = (char *) alloca (p - *argptr + 1);
- bcopy (*argptr, copy, p - *argptr);
- copy[p - *argptr] = 0;
- while (*p == ' ' || *p == '\t') p++;
- *argptr = p;
-
- /* Look up that token as a function.
- If file specified, use that file's per-file block to start with. */
-
- sym = lookup_symbol (copy, s ? BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), 1) : 0,
- VAR_NAMESPACE);
-
- if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
- {
- /* Arg is the name of a function */
- pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) + FUNCTION_START_OFFSET;
- if (funfirstline)
- SKIP_PROLOGUE (pc);
- value = find_pc_line (pc, 0);
- value.pc = (value.end && value.pc != pc) ? value.end : pc;
- return value;
- }
-
- if (sym)
- error ("%s is not a function.", copy);
-
- if ((i = lookup_misc_func (copy)) < 0)
- error ("Function %s not defined.", copy);
- else
- {
- value.symtab = 0;
- value.line = 0;
- value.pc = misc_function_vector[i].address + FUNCTION_START_OFFSET;
- if (funfirstline)
- SKIP_PROLOGUE (value.pc);
- return value;
- }
-
- if (symtab_list == 0)
- error ("No symbol table is loaded. Use the \"symbol-file\" command.");
- error ("Function %s not defined.", copy);
- }
-
- struct symtab_and_line
- decode_line_spec (string, funfirstline)
- char *string;
- int funfirstline;
- {
- struct symtab_and_line sal;
- if (string == 0)
- error ("Empty line specification.");
- sal = decode_line_1 (&string, funfirstline,
- current_source_symtab, current_source_line);
- if (*string)
- error ("Junk at end of line specification: %s", string);
- return sal;
- }
-
- /* Return the index of misc function named NAME. */
-
- static
- int lookup_misc_func (name)
- register char *name;
- {
- register int i;
-
- for (i = 0; i < misc_function_count; i++)
- if (!strcmp (misc_function_vector[i].name, name))
- return i;
- return -1; /* not found */
- }
-
- static void
- sources_info ()
- {
- register struct symtab *s;
- register int column = 0;
-
- if (symtab_list == 0)
- {
- printf_filtered ("No symbol table is loaded.\n");
- return;
- }
- printf_filtered ("Source files for which symbol table is known:\n");
- for (s = symtab_list; s; s = s->next)
- {
- if (column != 0 && column + strlen (s->filename) >= 70)
- {
- printf_filtered ("\n");
- column = 0;
- }
- else if (column != 0)
- {
- printf_filtered (" ");
- column++;
- }
- printf_filtered ("%s", s->filename);
- column += strlen (s->filename);
- if (s->next)
- {
- printf_filtered (",");
- column++;
- }
- }
- printf_filtered ("\n");
- }
-
- /* List all symbols (if REGEXP is 0) or all symbols matching REGEXP.
- If CLASS is zero, list all symbols except functions and type names.
- If CLASS is 1, list only functions.
- If CLASS is 2, list only type names. */
-
- #define MORE \
- { print_count++; \
- if (print_count >= 21) \
- {printf_filtered ("--Type Return to print more--"); \
- print_count = 0; \
- fflush (stdout); \
- read_line (); } }
-
- static void sort_block_syms ();
-
- static void
- list_symbols (regexp, class)
- char *regexp;
- int class;
- {
- register struct symtab *s;
- register struct blockvector *bv;
- struct blockvector *prev_bv = 0;
- register struct block *b;
- register int i, j;
- register struct symbol *sym;
- char *val;
- int found_in_file;
- static char *classnames[]
- = {"variable", "function", "type"};
- int print_count = 0;
-
- if (regexp)
- if (val = (char *) re_comp (regexp))
- error ("Invalid regexp: %s", val);
-
- printf_filtered (regexp
- ? "All %ss matching regular expression \"%s\":\n"
- : "All defined %ss:\n",
- classnames[class],
- regexp);
-
- for (s = symtab_list; s; s = s->next)
- {
- found_in_file = 0;
- bv = BLOCKVECTOR (s);
- /* Often many files share a blockvector.
- Scan each blockvector only once so that
- we don't get every symbol many times.
- It happens that the first symtab in the list
- for any given blockvector is the main file. */
- if (bv != prev_bv)
- for (i = 0; i < 2; i++)
- {
- b = BLOCKVECTOR_BLOCK (bv, i);
- /* Skip the sort if this block is always sorted. */
- if (!BLOCK_SHOULD_SORT (b))
- sort_block_syms (b);
- for (j = 0; j < BLOCK_NSYMS (b); j++)
- {
- QUIT;
- sym = BLOCK_SYM (b, j);
- if ((regexp == 0 || re_exec (SYMBOL_NAME (sym)))
- && ((class == 0 && SYMBOL_CLASS (sym) != LOC_TYPEDEF
- && SYMBOL_CLASS (sym) != LOC_BLOCK)
- || (class == 1 && SYMBOL_CLASS (sym) == LOC_BLOCK)
- || (class == 2 && SYMBOL_CLASS (sym) == LOC_TYPEDEF)))
- {
- if (!found_in_file)
- {
- printf_filtered ("\nFile %s:\n", s->filename);
- print_count += 2;
- }
- found_in_file = 1;
- MORE;
- if (class != 2 && i == 1)
- printf_filtered ("static ");
- if (class == 2
- && SYMBOL_NAMESPACE (sym) != STRUCT_NAMESPACE)
- printf_filtered ("typedef ");
-
- type_print (SYMBOL_TYPE (sym),
- (SYMBOL_CLASS (sym) == LOC_TYPEDEF
- ? "" : SYMBOL_NAME (sym)),
- stdout, 0);
- if (class == 2
- && SYMBOL_NAMESPACE (sym) != STRUCT_NAMESPACE
- && (TYPE_NAME ((SYMBOL_TYPE (sym))) == 0
- || 0 != strcmp (TYPE_NAME ((SYMBOL_TYPE (sym))),
- SYMBOL_NAME (sym))))
- printf_filtered (" %s", SYMBOL_NAME (sym));
- printf_filtered (";\n");
- }
- }
- }
- prev_bv = bv;
- }
- }
-
- static void
- variables_info (regexp)
- char *regexp;
- {
- list_symbols (regexp, 0);
- }
-
- static void
- functions_info (regexp)
- char *regexp;
- {
- list_symbols (regexp, 1);
- }
-
- static void
- types_info (regexp)
- char *regexp;
- {
- list_symbols (regexp, 2);
- }
-
- /* Call sort_block_syms to sort alphabetically the symbols of one block. */
-
- static int
- compare_symbols (s1, s2)
- struct symbol **s1, **s2;
- {
- /* Names that are less should come first. */
- register int namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2));
- if (namediff != 0) return namediff;
- /* For symbols of the same name, registers should come first. */
- return ((SYMBOL_CLASS (*s2) == LOC_REGISTER)
- - (SYMBOL_CLASS (*s1) == LOC_REGISTER));
- }
-
- static void
- sort_block_syms (b)
- register struct block *b;
- {
- qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
- sizeof (struct symbol *), compare_symbols);
- }
-
- /* Initialize the standard C scalar types. */
-
- static
- struct type *
- init_type (code, length, uns, name)
- enum type_code code;
- int length, uns;
- char *name;
- {
- register struct type *type;
-
- type = (struct type *) xmalloc (sizeof (struct type));
- bzero (type, sizeof *type);
- TYPE_CODE (type) = code;
- TYPE_LENGTH (type) = length;
- TYPE_FLAGS (type) = uns ? TYPE_FLAG_UNSIGNED : 0;
- TYPE_FLAGS (type) |= TYPE_FLAG_PERM;
- TYPE_NFIELDS (type) = 0;
- TYPE_NAME (type) = name;
-
- return type;
- }
-
- void
- initialize_symtab ()
- {
- add_info ("variables", variables_info,
- "All global and static variable names, or those matching REGEXP.");
- add_info ("functions", functions_info,
- "All function names, or those matching REGEXP.");
- add_info ("types", types_info,
- "All types names, or those matching REGEXP.");
- add_info ("sources", sources_info,
- "Source files in the program.");
-
- obstack_init (symbol_obstack);
-
- builtin_type_void = init_type (TYPE_CODE_VOID, 0, 0, "void");
-
- builtin_type_float = init_type (TYPE_CODE_FLT, sizeof (float), 0, "float");
- builtin_type_double = init_type (TYPE_CODE_FLT, sizeof (double), 0, "double");
-
- builtin_type_char = init_type (TYPE_CODE_INT, sizeof (char), 0, "char");
- builtin_type_short = init_type (TYPE_CODE_INT, sizeof (short), 0, "short");
- builtin_type_long = init_type (TYPE_CODE_INT, sizeof (long), 0, "long");
- builtin_type_int = init_type (TYPE_CODE_INT, sizeof (int), 0, "int");
-
- builtin_type_unsigned_char = init_type (TYPE_CODE_INT, sizeof (char), 1, "unsigned char");
- builtin_type_unsigned_short = init_type (TYPE_CODE_INT, sizeof (short), 1, "unsigned short");
- builtin_type_unsigned_long = init_type (TYPE_CODE_INT, sizeof (long), 1, "unsigned long");
- builtin_type_unsigned_int = init_type (TYPE_CODE_INT, sizeof (int), 1, "unsigned int");
- }
-