diff options
Diffstat (limited to 'gdb/RCS/symmisc.c,v')
| -rw-r--r-- | gdb/RCS/symmisc.c,v | 575 |
1 files changed, 0 insertions, 575 deletions
diff --git a/gdb/RCS/symmisc.c,v b/gdb/RCS/symmisc.c,v deleted file mode 100644 index 42653dfba97..00000000000 --- a/gdb/RCS/symmisc.c,v +++ /dev/null @@ -1,575 +0,0 @@ -head 1.2; -access ; -symbols RMS-has:1.2; -locks ; strict; -comment @ * @; - - -1.2 -date 88.01.26.05.09.53; author gnu; state Exp; -branches ; -next 1.1; - -1.1 -date 88.01.26.04.25.22; author gnu; state Exp; -branches ; -next ; - - -desc -@Original from RMS's devl sources on wheaties -@ - - -1.2 -log -@Check for null pointer passed to free()... -@ -text -@/* Do various things to symbol tables (other than lookup)), for GDB. - Copyright (C) 1986, 1987 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 "initialize.h" -#include "symtab.h" - -#include <stdio.h> -#include <obstack.h> - -static void free_symtab (); - -START_FILE - -/* Free all the symtabs that are currently installed, - and all storage associated with them. - Leaves us in a consistent state with no symtabs installed. */ - -void -free_all_symtabs () -{ - register struct symtab *s, *snext; - - /* All values will be invalid because their types will be! */ - - clear_value_history (); - clear_displays (); - clear_internalvars (); - clear_breakpoints (); - set_default_breakpoint (0, 0, 0, 0); - - current_source_symtab = 0; - - for (s = symtab_list; s; s = snext) - { - snext = s->next; - free_symtab (s); - } - symtab_list = 0; - obstack_free (symbol_obstack, 0); - obstack_init (symbol_obstack); - - if (misc_function_vector) - free (misc_function_vector); - misc_function_count = 0; - misc_function_vector = 0; -} - -/* Free a struct block <- B and all the symbols defined in that block. */ - -static void -free_symtab_block (b) - struct block *b; -{ - register int i, n; - n = BLOCK_NSYMS (b); - for (i = 0; i < n; i++) - { - free (SYMBOL_NAME (BLOCK_SYM (b, i))); - free (BLOCK_SYM (b, i)); - } - free (b); -} - -/* Free all the storage associated with the struct symtab <- S. - Note that some symtabs have contents malloc'ed structure by structure, - while some have contents that all live inside one big block of memory, - and some share the contents of another symbol table and so you should - not free the contents on their behalf (except sometimes the linetable, - which maybe per symtab even when the rest is not). - It is s->free_code that says which alternative to use. */ - -static void -free_symtab (s) - register struct symtab *s; -{ - register int i, n; - register struct blockvector *bv; - register struct type *type; - register struct typevector *tv; - - switch (s->free_code) - { - case free_nothing: - /* All the contents are part of a big block of memory - and some other symtab is in charge of freeing that block. - Therefore, do nothing. */ - break; - - case free_explicit: - /* All the contents are part of a big block of memory - and that is our `free_ptr' and will be freed below. */ - break; - - case free_contents: - /* Here all the contents were malloc'ed structure by structure - and must be freed that way. */ - /* First free the blocks (and their symbols. */ - bv = BLOCKVECTOR (s); - n = BLOCKVECTOR_NBLOCKS (bv); - for (i = 0; i < n; i++) - free_symtab_block (BLOCKVECTOR_BLOCK (bv, i)); - /* Free the blockvector itself. */ - free (bv); - /* Free the type vector. */ - tv = TYPEVECTOR (s); - if (tv) /* FIXME, should this happen? It does... */ - free (tv); - /* Also free the linetable. */ - - case free_linetable: - /* Everything will be freed either by our `free_ptr' - or by some other symbatb, except for our linetable. - Free that now. */ - free (LINETABLE (s)); - break; - } - - /* If there is a single block of memory to free, free it. */ - if (s->free_ptr) - free (s->free_ptr); - - if (s->line_charpos) - free (s->line_charpos); - free (s->filename); - free (s); -} - -/* Convert a raw symbol-segment to a struct symtab, - and relocate its internal pointers so that it is valid. */ - -/* This is how to relocate one pointer, given a name for it. - Works independent of the type of object pointed to. */ -#define RELOCATE(slot) (slot ? (* (char **) &slot += relocation) : 0) - -/* This is the inverse of RELOCATE. We use it when storing - a core address into a slot that has yet to be relocated. */ -#define UNRELOCATE(slot) (slot ? (* (char **) &slot -= relocation) : 0) - -/* During the process of relocation, this holds the amount to relocate by - (the address of the file's symtab data, in core in the debugger). */ -static int relocation; - -#define CORE_RELOCATE(slot) \ - ((slot) += (((slot) < data_start) ? text_relocation \ - : ((slot) < bss_start) ? data_relocation : bss_relocation)) - -#define TEXT_RELOCATE(slot) ((slot) += text_relocation) - -/* Relocation amounts for addresses in the program's core image. */ -static int text_relocation, data_relocation, bss_relocation; - -/* Boundaries that divide program core addresses into text, data and bss; - used to determine which relocation amount to use. */ -static int data_start, bss_start; - -static void relocate_typevector (); -static void relocate_blockvector (); -static void relocate_type (); -static void relocate_block (); -static void relocate_symbol (); - -/* Relocate a file symbol table so that all the pointers - are valid C pointers. Pass the struct symtab for the file - and the amount to relocate by. */ - -static struct symtab * -relocate_symtab (root) - struct symbol_root *root; -{ - struct symtab *sp = (struct symtab *) xmalloc (sizeof (struct symtab)); - bzero (sp, sizeof (struct symtab)); - - relocation = (int) root; - text_relocation = root->textrel; - data_relocation = root->datarel; - bss_relocation = root->bssrel; - data_start = root->databeg; - bss_start = root->bssbeg; - - sp->filename = root->filename; - sp->ldsymoff = root->ldsymoff; - sp->language = root->language; - sp->compilation = root->compilation; - sp->version = root->version; - sp->blockvector = root->blockvector; - sp->typevector = root->typevector; - sp->free_code = free_explicit; - sp->free_ptr = (char *) root; - - RELOCATE (TYPEVECTOR (sp)); - RELOCATE (BLOCKVECTOR (sp)); - RELOCATE (sp->version); - RELOCATE (sp->compilation); - RELOCATE (sp->filename); - - relocate_typevector (TYPEVECTOR (sp)); - relocate_blockvector (BLOCKVECTOR (sp)); - - return sp; -} - -static void -relocate_typevector (tv) - struct typevector *tv; -{ - register int ntypes = TYPEVECTOR_NTYPES (tv); - register int i; - - for (i = 0; i < ntypes; i++) - RELOCATE (TYPEVECTOR_TYPE (tv, i)); - for (i = 0; i < ntypes; i++) - relocate_type (TYPEVECTOR_TYPE (tv, i)); -} - -static void -relocate_blockvector (blp) - register struct blockvector *blp; -{ - register int nblocks = BLOCKVECTOR_NBLOCKS (blp); - register int i; - for (i = 0; i < nblocks; i++) - RELOCATE (BLOCKVECTOR_BLOCK (blp, i)); - for (i = 0; i < nblocks; i++) - relocate_block (BLOCKVECTOR_BLOCK (blp, i)); -} - -static void -relocate_block (bp) - register struct block *bp; -{ - register int nsyms = BLOCK_NSYMS (bp); - register int i; - - TEXT_RELOCATE (BLOCK_START (bp)); - TEXT_RELOCATE (BLOCK_END (bp)); - - /* These two should not be recursively processed. - The superblock need not be because all blocks are - processed from relocate_blockvector. - The function need not be because it will be processed - under the block which is its scope. */ - RELOCATE (BLOCK_SUPERBLOCK (bp)); - RELOCATE (BLOCK_FUNCTION (bp)); - - for (i = 0; i < nsyms; i++) - RELOCATE (BLOCK_SYM (bp, i)); - - for (i = 0; i < nsyms; i++) - relocate_symbol (BLOCK_SYM (bp, i)); -} - -static void -relocate_symbol (sp) - register struct symbol *sp; -{ - RELOCATE (SYMBOL_NAME (sp)); - if (SYMBOL_CLASS (sp) == LOC_BLOCK) - { - RELOCATE (SYMBOL_BLOCK_VALUE (sp)); - /* We can assume the block that belongs to this symbol - is not relocated yet, since it comes after - the block that contains this symbol. */ - BLOCK_FUNCTION (SYMBOL_BLOCK_VALUE (sp)) = sp; - UNRELOCATE (BLOCK_FUNCTION (SYMBOL_BLOCK_VALUE (sp))); - } - else if (SYMBOL_CLASS (sp) == LOC_STATIC) - CORE_RELOCATE (SYMBOL_VALUE (sp)); - else if (SYMBOL_CLASS (sp) == LOC_LABEL) - TEXT_RELOCATE (SYMBOL_VALUE (sp)); - RELOCATE (SYMBOL_TYPE (sp)); -} - -/* We cannot come up with an a priori spanning tree - for the network of types, since types can be used - for many symbols and also as components of other types. - Therefore, we need to be able to mark types that we - already have relocated (or are already in the middle of relocating) - as in a garbage collector. */ - -static void -relocate_type (tp) - register struct type *tp; -{ - register int nfields = TYPE_NFIELDS (tp); - register int i; - - RELOCATE (TYPE_NAME (tp)); - RELOCATE (TYPE_TARGET_TYPE (tp)); - RELOCATE (TYPE_FIELDS (tp)); - RELOCATE (TYPE_POINTER_TYPE (tp)); - - for (i = 0; i < nfields; i++) - { - RELOCATE (TYPE_FIELD_TYPE (tp, i)); - RELOCATE (TYPE_FIELD_NAME (tp, i)); - } -} - -/* Read symsegs from file named NAME open on DESC, - make symtabs from them, and return a chain of them. - Assumes DESC is prepositioned at the end of the string table, - just before the symsegs if there are any. */ - -struct symtab * -read_symsegs (desc, name) - int desc; - char *name; -{ - struct symbol_root root; - register char *data; - register struct symtab *sp, *chain = 0; - register int len; - - while (1) - { - len = myread (desc, &root, sizeof root); - if (len == 0 || root.format == 0) - break; - if (root.format != 1 || - root.length < sizeof root) - error ("Invalid symbol segment format code"); - data = (char *) xmalloc (root.length); - bcopy (&root, data, sizeof root); - len = myread (desc, data + sizeof root, - root.length - sizeof root); - sp = relocate_symtab (data); - sp->next = chain; - chain = sp; - } - - return chain; -} - -static int block_depth (); -static void print_spaces (); -static void print_symbol (); - -print_symtabs (filename) - char *filename; -{ - FILE *outfile; - register struct symtab *s; - register int i, j; - int len, line, blen; - register struct linetable *l; - struct blockvector *bv; - register struct block *b; - int depth; - struct cleanup *cleanups; - extern int fclose(); - - if (filename == 0) - error_no_arg ("file to write symbol data in"); - outfile = fopen (filename, "w"); - - cleanups = make_cleanup (fclose, outfile); - immediate_quit++; - - for (s = symtab_list; s; s = s->next) - { - /* First print the line table. */ - fprintf (outfile, "Symtab for file %s\n\n", s->filename); - fprintf (outfile, "Line table:\n\n"); - l = LINETABLE (s); - len = l->nitems; - for (i = 0; i < len; i++) - { - if (l->item[i] < 0) - line = - l->item[i] - 1; - else - fprintf (outfile, " line %d at %x\n", ++line, l->item[i]); - } - /* Now print the block info. */ - fprintf (outfile, "\nBlockvector:\n\n"); - bv = BLOCKVECTOR (s); - len = BLOCKVECTOR_NBLOCKS (bv); - for (i = 0; i < len; i++) - { - b = BLOCKVECTOR_BLOCK (bv, i); - depth = block_depth (b) * 2; - print_spaces (depth, outfile); - fprintf (outfile, "block #%03d (object 0x%x) ", i, b); - fprintf (outfile, "[0x%x..0x%x]", BLOCK_START (b), BLOCK_END (b)); - if (BLOCK_SUPERBLOCK (b)) - fprintf (outfile, " (under 0x%x)", BLOCK_SUPERBLOCK (b)); - if (BLOCK_FUNCTION (b)) - fprintf (outfile, " %s", SYMBOL_NAME (BLOCK_FUNCTION (b))); - fputc ('\n', outfile); - blen = BLOCK_NSYMS (b); - for (j = 0; j < blen; j++) - { - print_symbol (BLOCK_SYM (b, j), depth + 1, outfile); - } - } - - fprintf (outfile, "\n\n"); - } - - immediate_quit--; - do_cleanups (cleanups); -} - -static void -print_symbol (symbol, depth, outfile) - struct symbol *symbol; - int depth; - FILE *outfile; -{ - print_spaces (depth, outfile); - if (SYMBOL_NAMESPACE (symbol) == LABEL_NAMESPACE) - { - fprintf (outfile, "label %s at 0x%x", SYMBOL_NAME (symbol), - SYMBOL_VALUE (symbol)); - return; - } - if (SYMBOL_NAMESPACE (symbol) == STRUCT_NAMESPACE) - { - if (TYPE_NAME (SYMBOL_TYPE (symbol))) - { - type_print_1 (SYMBOL_TYPE (symbol), "", outfile, 1, depth); - } - else - { - fprintf (outfile, "%s %s = ", - (TYPE_CODE (SYMBOL_TYPE (symbol)) == TYPE_CODE_ENUM - ? "enum" - : (TYPE_CODE (SYMBOL_TYPE (symbol)) == TYPE_CODE_STRUCT - ? "struct" : "union")), - SYMBOL_NAME (symbol)); - type_print_1 (SYMBOL_TYPE (symbol), "", outfile, 1, depth); - } - fprintf (outfile, ";\n"); - } - else - { - if (SYMBOL_CLASS (symbol) == LOC_TYPEDEF) - fprintf (outfile, "typedef "); - if (SYMBOL_TYPE (symbol)) - { - type_print_1 (SYMBOL_TYPE (symbol), SYMBOL_NAME (symbol), - outfile, 1, depth); - fprintf (outfile, "; "); - } - else - fprintf (outfile, "%s ", SYMBOL_NAME (symbol)); - - switch (SYMBOL_CLASS (symbol)) - { - case LOC_CONST: - fprintf (outfile, "const %d (0x%x),", - SYMBOL_VALUE (symbol), SYMBOL_VALUE (symbol)); - break; - - case LOC_CONST_BYTES: - fprintf (outfile, "const %d hex bytes:", - TYPE_LENGTH (SYMBOL_TYPE (symbol))); - { - int i; - for (i = 0; i < TYPE_LENGTH (SYMBOL_TYPE (symbol)); i++) - fprintf (outfile, " %2x", SYMBOL_VALUE_BYTES (symbol) [i]); - fprintf (outfile, ","); - } - break; - - case LOC_STATIC: - fprintf (outfile, "static at 0x%x,", SYMBOL_VALUE (symbol)); - break; - - case LOC_REGISTER: - fprintf (outfile, "register %d,", SYMBOL_VALUE (symbol)); - break; - - case LOC_ARG: - fprintf (outfile, "arg at 0x%x,", SYMBOL_VALUE (symbol)); - break; - - case LOC_LOCAL: - fprintf (outfile, "local at 0x%x,", SYMBOL_VALUE (symbol)); - break; - - case LOC_TYPEDEF: - break; - - case LOC_LABEL: - fprintf (outfile, "label at 0x%x", SYMBOL_VALUE (symbol)); - break; - - case LOC_BLOCK: - fprintf (outfile, "block (object 0x%x) starting at 0x%x,", - SYMBOL_VALUE (symbol), - BLOCK_START (SYMBOL_BLOCK_VALUE (symbol))); - break; - } - } - fprintf (outfile, "\n"); -} - -/* Return the nexting depth of a block within other blocks in its symtab. */ - -static int -block_depth (block) - struct block *block; -{ - register int i = 0; - while (block = BLOCK_SUPERBLOCK (block)) i++; - return i; -} - -static -initialize () -{ - add_com ("printsyms", class_obscure, print_symtabs, - "Print dump of current symbol definitions to file OUTFILE."); -} - -END_FILE -@ - - -1.1 -log -@Initial revision -@ -text -@d125 2 -a126 1 - free (tv); -@ |