binutils-gdb/gprof/sym_ids.c

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#include <ctype.h>
#include "libiberty.h"
#include "cg_arcs.h"
#include "sym_ids.h"
struct sym_id
{
struct sym_id *next;
char *spec; /* parsing modifies this */
Table_Id which_table;
bool has_right;
struct match
{
int prev_index; /* index of prev match */
Sym *prev_match; /* previous match */
Sym *first_match; /* chain of all matches */
Sym sym;
}
left, right;
}
*id_list;
Sym_Table syms[NUM_TABLES];
#ifdef DEBUG
const char *table_name[] =
{
"INCL_GRAPH", "EXCL_GRAPH",
"INCL_ARCS", "EXCL_ARCS",
"INCL_FLAT", "EXCL_FLAT",
"INCL_TIME", "EXCL_TIME",
"INCL_ANNO", "EXCL_ANNO",
"INCL_EXEC", "EXCL_EXEC"
};
#endif /* DEBUG */
/*
* This is the table in which we keep all the syms that match
* the right half of an arc id. It is NOT sorted according
* to the addresses, because it is accessed only through
* the left half's CHILDREN pointers (so it's crucial not
* to reorder this table once pointers into it exist).
*/
static Sym_Table right_ids;
static Source_File non_existent_file =
{
0, "<non-existent-file>"
};
void
DEFUN (sym_id_add, (spec, which_table),
const char *spec AND Table_Id which_table)
{
struct sym_id *id;
int len = strlen (spec);
id = (struct sym_id *) xmalloc (sizeof (*id) + len + 1);
memset (id, 0, sizeof (*id));
id->spec = (char *) id + sizeof (*id);
strcpy (id->spec, spec);
id->which_table = which_table;
id->next = id_list;
id_list = id;
}
/*
* A spec has the syntax FILENAME:(FUNCNAME|LINENUM). As a convenience
* to the user, a spec without a colon is interpreted as:
*
* (i) a FILENAME if it contains a dot
* (ii) a FUNCNAME if it starts with a non-digit character
* (iii) a LINENUM if it starts with a digit
*
* A FUNCNAME containing a dot can be specified by :FUNCNAME, a
* FILENAME not containing a dot can be specified by FILENAME:.
*/
static void
DEFUN (parse_spec, (spec, sym), char *spec AND Sym * sym)
{
char *colon;
sym_init (sym);
colon = strrchr (spec, ':');
if (colon)
{
*colon = '\0';
if (colon > spec)
{
sym->file = source_file_lookup_name (spec);
if (!sym->file)
{
sym->file = &non_existent_file;
}
}
spec = colon + 1;
if (strlen (spec))
{
if (isdigit ((unsigned char) spec[0]))
{
sym->line_num = atoi (spec);
}
else
{
sym->name = spec;
}
}
}
else if (strlen (spec))
{
/* no colon: spec is a filename if it contains a dot: */
if (strchr (spec, '.'))
{
sym->file = source_file_lookup_name (spec);
if (!sym->file)
{
sym->file = &non_existent_file;
}
}
else if (isdigit ((unsigned char) *spec))
{
sym->line_num = atoi (spec);
}
else if (strlen (spec))
{
sym->name = spec;
}
}
}
/*
* A symbol id has the syntax SPEC[/SPEC], where SPEC is is defined
* by parse_spec().
*/
static void
DEFUN (parse_id, (id), struct sym_id *id)
{
char *slash;
DBG (IDDEBUG, printf ("[parse_id] %s -> ", id->spec));
slash = strchr (id->spec, '/');
if (slash)
{
parse_spec (slash + 1, &id->right.sym);
*slash = '\0';
id->has_right = TRUE;
}
parse_spec (id->spec, &id->left.sym);
#ifdef DEBUG
if (debug_level & IDDEBUG)
{
printf ("%s:", id->left.sym.file ? id->left.sym.file->name : "*");
if (id->left.sym.name)
{
printf ("%s", id->left.sym.name);
}
else if (id->left.sym.line_num)
{
printf ("%d", id->left.sym.line_num);
}
else
{
printf ("*");
}
if (id->has_right)
{
printf ("/%s:",
id->right.sym.file ? id->right.sym.file->name : "*");
if (id->right.sym.name)
{
printf ("%s", id->right.sym.name);
}
else if (id->right.sym.line_num)
{
printf ("%d", id->right.sym.line_num);
}
else
{
printf ("*");
}
}
printf ("\n");
}
#endif
}
/*
* Return TRUE iff PATTERN matches SYM.
*/
static bool
DEFUN (match, (pattern, sym), Sym * pattern AND Sym * sym)
{
return (pattern->file ? pattern->file == sym->file : TRUE)
&& (pattern->line_num ? pattern->line_num == sym->line_num : TRUE)
&& (pattern->name ? strcmp (pattern->name, sym->name) == 0 : TRUE);
}
static void
DEFUN (extend_match, (m, sym, tab, second_pass),
struct match *m AND Sym * sym AND Sym_Table * tab AND bool second_pass)
{
if (m->prev_match != sym - 1)
{
/* discontinuity: add new match to table: */
if (second_pass)
{
tab->base[tab->len] = *sym;
m->prev_index = tab->len;
/* link match into match's chain: */
tab->base[tab->len].next = m->first_match;
m->first_match = &tab->base[tab->len];
}
++tab->len;
}
/* extend match to include this symbol: */
if (second_pass)
{
tab->base[m->prev_index].end_addr = sym->end_addr;
}
m->prev_match = sym;
}
/*
* Go through sym_id list produced by option processing and fill
* in the various symbol tables indicating what symbols should
* be displayed or suppressed for the various kinds of outputs.
*
* This can potentially produce huge tables and in particulars
* tons of arcs, but this happens only if the user makes silly
* requests---you get what you ask for!
*/
void
DEFUN_VOID (sym_id_parse)
{
Sym *sym, *left, *right;
struct sym_id *id;
Sym_Table *tab;
/*
* Convert symbol ids into Syms, so we can deal with them more easily:
*/
for (id = id_list; id; id = id->next)
{
parse_id (id);
}
/* first determine size of each table: */
for (sym = symtab.base; sym < symtab.limit; ++sym)
{
for (id = id_list; id; id = id->next)
{
if (match (&id->left.sym, sym))
{
extend_match (&id->left, sym, &syms[id->which_table], FALSE);
}
if (id->has_right && match (&id->right.sym, sym))
{
extend_match (&id->right, sym, &right_ids, FALSE);
}
}
}
/* create tables of appropriate size and reset lengths: */
for (tab = syms; tab < &syms[NUM_TABLES]; ++tab)
{
if (tab->len)
{
tab->base = (Sym *) xmalloc (tab->len * sizeof (Sym));
tab->limit = tab->base + tab->len;
tab->len = 0;
}
}
if (right_ids.len)
{
right_ids.base = (Sym *) xmalloc (right_ids.len * sizeof (Sym));
right_ids.limit = right_ids.base + right_ids.len;
right_ids.len = 0;
}
/* make a second pass through symtab, creating syms as necessary: */
for (sym = symtab.base; sym < symtab.limit; ++sym)
{
for (id = id_list; id; id = id->next)
{
if (match (&id->left.sym, sym))
{
extend_match (&id->left, sym, &syms[id->which_table], TRUE);
}
if (id->has_right && match (&id->right.sym, sym))
{
extend_match (&id->right, sym, &right_ids, TRUE);
}
}
}
/* go through ids creating arcs as needed: */
for (id = id_list; id; id = id->next)
{
if (id->has_right)
{
for (left = id->left.first_match; left; left = left->next)
{
for (right = id->right.first_match; right; right = right->next)
{
DBG (IDDEBUG,
printf (
"[sym_id_parse]: arc %s:%s(%lx-%lx) -> %s:%s(%lx-%lx) to %s\n",
left->file ? left->file->name : "*",
left->name ? left->name : "*", left->addr,
left->end_addr,
right->file ? right->file->name : "*",
right->name ? right->name : "*", right->addr,
right->end_addr,
table_name[id->which_table]));
arc_add (left, right, (unsigned long) 0);
}
}
}
}
/* finally, we can sort the tables and we're done: */
for (tab = &syms[0]; tab < &syms[NUM_TABLES]; ++tab)
{
DBG (IDDEBUG, printf ("[sym_id_parse] syms[%s]:\n",
table_name[tab - &syms[0]]));
symtab_finalize (tab);
}
}
/*
* Symbol tables storing the FROM symbols of arcs do not necessarily
* have distinct address ranges. For example, somebody might request
* -k /_mcount to suppress any arcs into _mcount, while at the same
* time requesting -k a/b. Fortunately, those symbol tables don't get
* very big (the user has to type them!), so a linear search is probably
* tolerable.
*/
bool
DEFUN (sym_id_arc_is_present, (symtab, from, to),
Sym_Table * symtab AND Sym * from AND Sym * to)
{
Sym *sym;
for (sym = symtab->base; sym < symtab->limit; ++sym)
{
if (from->addr >= sym->addr && from->addr <= sym->end_addr
&& arc_lookup (sym, to))
{
return TRUE;
}
}
return FALSE;
}