/* C preprocessor macro tables for GDB.
- Copyright (C) 2002, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 2002-2020 Free Software Foundation, Inc.
Contributed by Red Hat, Inc.
This file is part of GDB.
#include "defs.h"
#include "gdb_obstack.h"
#include "splay-tree.h"
+#include "filenames.h"
#include "symtab.h"
#include "symfile.h"
#include "objfiles.h"
#include "macrotab.h"
-#include "gdb_assert.h"
#include "bcache.h"
#include "complaints.h"
+#include "macroexp.h"
\f
/* The macro table structure. */
/* The bcache we should use to hold macro names, argument names, and
definitions, or zero if we should use xmalloc. */
- struct bcache *bcache;
+ gdb::bcache *bcache;
/* The main source file for this compilation unit --- the one whose
name was given to the compiler. This is the root of the
#inclusion tree; everything else is #included from here. */
struct macro_source_file *main_source;
+ /* Backlink to containing compilation unit, or NULL if there isn't one. */
+ struct compunit_symtab *compunit_symtab;
+
+ /* True if macros in this table can be redefined without issuing an
+ error. */
+ int redef_ok;
+
/* The table of macro definitions. This is a splay tree (an ordered
binary tree that stays balanced, effectively), sorted by macro
name. Where a macro gets defined more than once (presumably with
macro_bcache (struct macro_table *t, const void *addr, int len)
{
if (t->bcache)
- return bcache (addr, len, t->bcache);
+ return t->bcache->insert (addr, len);
else
{
void *copy = xmalloc (len);
+
memcpy (copy, addr, len);
return copy;
}
static const char *
macro_bcache_str (struct macro_table *t, const char *s)
{
- return (char *) macro_bcache (t, s, strlen (s) + 1);
+ return (const char *) macro_bcache (t, s, strlen (s) + 1);
}
struct macro_table *table;
/* The name of the macro. This is in the table's bcache, if it has
- one. */
+ one. */
const char *name;
/* The source file and line number where the definition's scope
const char *name, struct macro_source_file *file, int line)
{
int names = strcmp (key->name, name);
+
if (names)
return names;
struct macro_source_file *file,
int line)
{
- struct macro_key *k = macro_alloc (sizeof (*k), t);
+ struct macro_key *k = (struct macro_key *) macro_alloc (sizeof (*k), t);
memset (k, 0, sizeof (*k));
k->table = t;
const char *filename)
{
/* Get space for the source file structure itself. */
- struct macro_source_file *f = macro_alloc (sizeof (*f), t);
+ struct macro_source_file *f
+ = (struct macro_source_file *) macro_alloc (sizeof (*f), t);
memset (f, 0, sizeof (*f));
f->table = t;
}
+void
+macro_allow_redefinitions (struct macro_table *t)
+{
+ gdb_assert (! t->obstack);
+ t->redef_ok = 1;
+}
+
+
struct macro_source_file *
macro_include (struct macro_source_file *source,
int line,
const char *included)
{
- struct macro_source_file *new;
+ struct macro_source_file *newobj;
struct macro_source_file **link;
/* Find the right position in SOURCE's `includes' list for the new
should tolerate bad debug info. So:
First, squawk. */
- complaint (&symfile_complaints,
- _("both `%s' and `%s' allegedly #included at %s:%d"), included,
- (*link)->filename, source->filename, line);
+
+ std::string link_fullname = macro_source_fullname (*link);
+ std::string source_fullname = macro_source_fullname (source);
+ complaint (_("both `%s' and `%s' allegedly #included at %s:%d"),
+ included, link_fullname.c_str (), source_fullname.c_str (),
+ line);
/* Now, choose a new, unoccupied line number for this
#inclusion, after the alleged #inclusion line. */
/* At this point, we know that LINE is an unused line number, and
*LINK points to the entry an #inclusion at that line should
precede. */
- new = new_source_file (source->table, included);
- new->included_by = source;
- new->included_at_line = line;
- new->next_included = *link;
- *link = new;
+ newobj = new_source_file (source->table, included);
+ newobj->included_by = source;
+ newobj->included_at_line = line;
+ newobj->next_included = *link;
+ *link = newobj;
- return new;
+ return newobj;
}
macro_lookup_inclusion (struct macro_source_file *source, const char *name)
{
/* Is SOURCE itself named NAME? */
- if (strcmp (name, source->filename) == 0)
+ if (filename_cmp (name, source->filename) == 0)
return source;
- /* The filename in the source structure is probably a full path, but
- NAME could be just the final component of the name. */
- {
- int name_len = strlen (name);
- int src_name_len = strlen (source->filename);
-
- /* We do mean < here, and not <=; if the lengths are the same,
- then the strcmp above should have triggered, and we need to
- check for a slash here. */
- if (name_len < src_name_len
- && source->filename[src_name_len - name_len - 1] == '/'
- && strcmp (name, source->filename + src_name_len - name_len) == 0)
- return source;
- }
-
/* It's not us. Try all our children, and return the lowest. */
{
struct macro_source_file *child;
int argc, const char **argv,
const char *replacement)
{
- struct macro_definition *d = macro_alloc (sizeof (*d), t);
+ struct macro_definition *d
+ = (struct macro_definition *) macro_alloc (sizeof (*d), t);
memset (d, 0, sizeof (*d));
d->table = t;
d->kind = kind;
d->replacement = macro_bcache_str (t, replacement);
+ d->argc = argc;
if (kind == macro_function_like)
{
int cached_argv_size = argc * sizeof (*cached_argv);
/* Bcache all the arguments. */
- cached_argv = alloca (cached_argv_size);
+ cached_argv = (const char **) alloca (cached_argv_size);
for (i = 0; i < argc; i++)
cached_argv[i] = macro_bcache_str (t, argv[i]);
/* Now bcache the array of argument pointers itself. */
- d->argv = macro_bcache (t, cached_argv, cached_argv_size);
- d->argc = argc;
+ d->argv = ((const char * const *)
+ macro_bcache (t, cached_argv, cached_argv_size));
}
/* We don't bcache the entire definition structure because it's got
if (! same)
{
- complaint (&symfile_complaints,
- _("macro `%s' redefined at %s:%d; original definition at %s:%d"),
- name, source->filename, line,
- found_key->start_file->filename, found_key->start_line);
+ std::string source_fullname = macro_source_fullname (source);
+ std::string found_key_fullname
+ = macro_source_fullname (found_key->start_file);
+ complaint (_("macro `%s' redefined at %s:%d; "
+ "original definition at %s:%d"),
+ name, source_fullname.c_str (), line,
+ found_key_fullname.c_str (),
+ found_key->start_line);
}
return found_key;
return 0;
}
+/* A helper function to define a new object-like or function-like macro
+ according to KIND. When KIND is macro_object_like,
+ the macro_special_kind must be provided as ARGC, and ARGV must be NULL.
+ When KIND is macro_function_like, ARGC and ARGV are giving the function
+ arguments. */
-void
-macro_define_object (struct macro_source_file *source, int line,
- const char *name, const char *replacement)
+static void
+macro_define_internal (struct macro_source_file *source, int line,
+ const char *name, enum macro_kind kind,
+ int argc, const char **argv,
+ const char *replacement)
{
struct macro_table *t = source->table;
- struct macro_key *k;
+ struct macro_key *k = NULL;
struct macro_definition *d;
- k = check_for_redefinition (source, line,
- name, macro_object_like,
- 0, 0,
- replacement);
+ if (! t->redef_ok)
+ k = check_for_redefinition (source, line,
+ name, kind,
+ argc, argv,
+ replacement);
/* If we're redefining a symbol, and the existing key would be
identical to our new key, then the splay_tree_insert function
return;
k = new_macro_key (t, name, source, line);
- d = new_macro_definition (t, macro_object_like, 0, 0, replacement);
+ d = new_macro_definition (t, kind, argc, argv, replacement);
splay_tree_insert (t->definitions, (splay_tree_key) k, (splay_tree_value) d);
}
+/* A helper function to define a new object-like macro. */
-void
-macro_define_function (struct macro_source_file *source, int line,
- const char *name, int argc, const char **argv,
- const char *replacement)
+static void
+macro_define_object_internal (struct macro_source_file *source, int line,
+ const char *name, const char *replacement,
+ enum macro_special_kind special_kind)
{
- struct macro_table *t = source->table;
- struct macro_key *k;
- struct macro_definition *d;
-
- k = check_for_redefinition (source, line,
- name, macro_function_like,
- argc, argv,
- replacement);
+ macro_define_internal (source, line,
+ name, macro_object_like,
+ special_kind, NULL,
+ replacement);
+}
- /* See comments about duplicate keys in macro_define_object. */
- if (k && ! key_compare (k, name, source, line))
- return;
+void
+macro_define_object (struct macro_source_file *source, int line,
+ const char *name, const char *replacement)
+{
+ macro_define_object_internal (source, line, name, replacement,
+ macro_ordinary);
+}
- /* We should also check here that all the argument names in ARGV are
- distinct. */
+/* See macrotab.h. */
- k = new_macro_key (t, name, source, line);
- d = new_macro_definition (t, macro_function_like, argc, argv, replacement);
- splay_tree_insert (t->definitions, (splay_tree_key) k, (splay_tree_value) d);
+void
+macro_define_special (struct macro_table *table)
+{
+ macro_define_object_internal (table->main_source, -1, "__FILE__", "",
+ macro_FILE);
+ macro_define_object_internal (table->main_source, -1, "__LINE__", "",
+ macro_LINE);
}
+void
+macro_define_function (struct macro_source_file *source, int line,
+ const char *name, int argc, const char **argv,
+ const char *replacement)
+{
+ macro_define_internal (source, line,
+ name, macro_function_like,
+ argc, argv,
+ replacement);
+}
void
macro_undef (struct macro_source_file *source, int line,
#definition. */
if (key->end_file)
{
- complaint (&symfile_complaints,
- _("macro '%s' is #undefined twice,"
+ std::string source_fullname = macro_source_fullname (source);
+ std::string key_fullname = macro_source_fullname (key->end_file);
+ complaint (_("macro '%s' is #undefined twice,"
" at %s:%d and %s:%d"),
- name,
- source->filename, line,
- key->end_file->filename, key->end_line);
+ name, source_fullname.c_str (), line,
+ key_fullname.c_str (),
+ key->end_line);
}
/* Whether or not we've seen a prior #undefinition, wipe out
has no macro definition in scope is ignored. So we should
ignore it too. */
#if 0
- complaint (&symfile_complaints,
- _("no definition for macro `%s' in scope to #undef at %s:%d"),
+ complaint (_("no definition for macro `%s' in scope to #undef at %s:%d"),
name, source->filename, line);
#endif
}
}
+/* A helper function that rewrites the definition of a special macro,
+ when needed. */
+
+static struct macro_definition *
+fixup_definition (const char *filename, int line, struct macro_definition *def)
+{
+ static char *saved_expansion;
+
+ if (saved_expansion)
+ {
+ xfree (saved_expansion);
+ saved_expansion = NULL;
+ }
+
+ if (def->kind == macro_object_like)
+ {
+ if (def->argc == macro_FILE)
+ {
+ saved_expansion = macro_stringify (filename);
+ def->replacement = saved_expansion;
+ }
+ else if (def->argc == macro_LINE)
+ {
+ saved_expansion = xstrprintf ("%d", line);
+ def->replacement = saved_expansion;
+ }
+ }
+
+ return def;
+}
struct macro_definition *
macro_lookup_definition (struct macro_source_file *source,
splay_tree_node n = find_definition (name, source, line);
if (n)
- return (struct macro_definition *) n->value;
+ {
+ std::string source_fullname = macro_source_fullname (source);
+ return fixup_definition (source_fullname.c_str (), line,
+ (struct macro_definition *) n->value);
+ }
else
return 0;
}
if (n)
{
struct macro_key *key = (struct macro_key *) n->key;
+
*definition_line = key->start_line;
return key->start_file;
}
}
+/* The type for callback data for iterating the splay tree in
+ macro_for_each and macro_for_each_in_scope. Only the latter uses
+ the FILE and LINE fields. */
+struct macro_for_each_data
+{
+ gdb::function_view<macro_callback_fn> fn;
+ struct macro_source_file *file;
+ int line;
+};
+
+/* Helper function for macro_for_each. */
+static int
+foreach_macro (splay_tree_node node, void *arg)
+{
+ struct macro_for_each_data *datum = (struct macro_for_each_data *) arg;
+ struct macro_key *key = (struct macro_key *) node->key;
+ struct macro_definition *def;
+
+ std::string key_fullname = macro_source_fullname (key->start_file);
+ def = fixup_definition (key_fullname.c_str (), key->start_line,
+ (struct macro_definition *) node->value);
+
+ datum->fn (key->name, def, key->start_file, key->start_line);
+ return 0;
+}
+
+/* Call FN for every macro in TABLE. */
+void
+macro_for_each (struct macro_table *table,
+ gdb::function_view<macro_callback_fn> fn)
+{
+ struct macro_for_each_data datum;
+
+ datum.fn = fn;
+ datum.file = NULL;
+ datum.line = 0;
+ splay_tree_foreach (table->definitions, foreach_macro, &datum);
+}
+
+static int
+foreach_macro_in_scope (splay_tree_node node, void *info)
+{
+ struct macro_for_each_data *datum = (struct macro_for_each_data *) info;
+ struct macro_key *key = (struct macro_key *) node->key;
+ struct macro_definition *def;
+
+ std::string datum_fullname = macro_source_fullname (datum->file);
+ def = fixup_definition (datum_fullname.c_str (), datum->line,
+ (struct macro_definition *) node->value);
+
+ /* See if this macro is defined before the passed-in line, and
+ extends past that line. */
+ if (compare_locations (key->start_file, key->start_line,
+ datum->file, datum->line) < 0
+ && (!key->end_file
+ || compare_locations (key->end_file, key->end_line,
+ datum->file, datum->line) >= 0))
+ datum->fn (key->name, def, key->start_file, key->start_line);
+ return 0;
+}
+
+/* Call FN for every macro is visible in SCOPE. */
+void
+macro_for_each_in_scope (struct macro_source_file *file, int line,
+ gdb::function_view<macro_callback_fn> fn)
+{
+ struct macro_for_each_data datum;
+
+ datum.fn = fn;
+ datum.file = file;
+ datum.line = line;
+ splay_tree_foreach (file->table->definitions,
+ foreach_macro_in_scope, &datum);
+}
+
+
\f
/* Creating and freeing macro tables. */
struct macro_table *
-new_macro_table (struct obstack *obstack,
- struct bcache *b)
+new_macro_table (struct obstack *obstack, gdb::bcache *b,
+ struct compunit_symtab *cust)
{
struct macro_table *t;
/* First, get storage for the `struct macro_table' itself. */
if (obstack)
- t = obstack_alloc (obstack, sizeof (*t));
+ t = XOBNEW (obstack, struct macro_table);
else
- t = xmalloc (sizeof (*t));
+ t = XNEW (struct macro_table);
memset (t, 0, sizeof (*t));
t->obstack = obstack;
t->bcache = b;
t->main_source = NULL;
+ t->compunit_symtab = cust;
+ t->redef_ok = 0;
t->definitions = (splay_tree_new_with_allocator
(macro_tree_compare,
((splay_tree_delete_key_fn) macro_tree_delete_key),
/* Free the table of macro definitions. */
splay_tree_delete (table->definitions);
}
+
+/* See macrotab.h for the comment. */
+
+std::string
+macro_source_fullname (struct macro_source_file *file)
+{
+ const char *comp_dir = NULL;
+
+ if (file->table->compunit_symtab != NULL)
+ comp_dir = COMPUNIT_DIRNAME (file->table->compunit_symtab);
+
+ if (comp_dir == NULL || IS_ABSOLUTE_PATH (file->filename))
+ return file->filename;
+
+ return std::string (comp_dir) + SLASH_STRING + file->filename;
+}
projects / deliverable / binutils-gdb.git / blobdiff