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Code cleanup.
	* skip.c (skip_function_command, skip_file_command, skip_info): Remove
	unused forward declarations.
	(skip_file_command): Make variables symtab and filename targets const.
	Use proper 0 vs. NULL constant everywhere.
	(skip_function_command): Use proper 0 vs. NULL constant everywhere.
	Include empty line after declarations.  Use GNU spacing in a comment.
	Do not use strlen for end of string check.
	(skip_info): Use proper 0 vs. NULL constant everywhere.  Add column 5
	comments.
	(skip_enable_command, skip_disable_command, skip_delete_command)
	(add_skiplist_entry): Use proper 0 vs. NULL constant everywhere.
	(function_pc_is_marked_for_skip): Make variable filename target const.
	Use proper 0 vs. NULL constant everywhere.  Fix GNU non-compliant
	comment formatting.
	(skip_re_set): Add empty line after function comment.  Use proper 0 vs.
	NULL constant everywhere.  Include empty line after declarations.  Make
	variable symtab target const.  Do not use strlen for end of string
	check.

gdb/doc/
	* gdbint.texinfo (Coding Standards) (C Usage): New rule for 0 vs. NULL.
This commit is contained in:
Jan Kratochvil 2012-12-16 19:00:04 +00:00
parent b57a636e4b
commit 3d745be3fc
4 changed files with 96 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
gdb/ChangeLog
View File

@ -1,3 +1,25 @@
2012-12-16 Jan Kratochvil <jan.kratochvil@redhat.com>
Code cleanup.
* skip.c (skip_function_command, skip_file_command, skip_info): Remove
unused forward declarations.
(skip_file_command): Make variables symtab and filename targets const.
Use proper 0 vs. NULL constant everywhere.
(skip_function_command): Use proper 0 vs. NULL constant everywhere.
Include empty line after declarations. Use GNU spacing in a comment.
Do not use strlen for end of string check.
(skip_info): Use proper 0 vs. NULL constant everywhere. Add column 5
comments.
(skip_enable_command, skip_disable_command, skip_delete_command)
(add_skiplist_entry): Use proper 0 vs. NULL constant everywhere.
(function_pc_is_marked_for_skip): Make variable filename target const.
Use proper 0 vs. NULL constant everywhere. Fix GNU non-compliant
comment formatting.
(skip_re_set): Add empty line after function comment. Use proper 0 vs.
NULL constant everywhere. Include empty line after declarations. Make
variable symtab target const. Do not use strlen for end of string
check.
2012-12-16 Jan Kratochvil <jan.kratochvil@redhat.com>
Code cleanup.

4
gdb/doc/ChangeLog
View File

@ -1,3 +1,7 @@
2012-12-16 Jan Kratochvil <jan.kratochvil@redhat.com>
* gdbint.texinfo (Coding Standards) (C Usage): New rule for 0 vs. NULL.
2012-12-15 Yao Qi <yao@codesourcery.com>
* gdb.texinfo (Debugging Output): Document 'set debug

19
gdb/doc/gdbint.texinfo
View File

@ -5907,6 +5907,25 @@ protected with parentheses.)
Declarations like @samp{struct foo *} should be used in preference to
declarations like @samp{typedef struct foo @{ @dots{} @} *foo_ptr}.
Zero constant (@code{0}) is not interchangeable with a null pointer
constant (@code{NULL}) anywhere. @sc{gcc} does not give a warning for
such interchange. Specifically:
@multitable @columnfractions .2 .5
@item incorrect
@tab @code{if (pointervar) @{@}}
@item incorrect
@tab @code{if (!pointervar) @{@}}
@item incorrect
@tab @code{if (pointervar != 0) @{@}}
@item incorrect
@tab @code{if (pointervar == 0) @{@}}
@item correct
@tab @code{if (pointervar != NULL) @{@}}
@item correct
@tab @code{if (pointervar == NULL) @{@}}
@end multitable
@subsection Function Prototypes
@cindex function prototypes

103
gdb/skip.c
View File

@ -62,10 +62,6 @@ struct skiplist_entry
struct skiplist_entry *next;
};
static void skip_function_command (char *arg, int from_tty);
static void skip_file_command (char *arg, int from_tty);
static void skip_info (char *arg, int from_tty);
static void add_skiplist_entry (struct skiplist_entry *e);
static void skip_function_pc (CORE_ADDR pc, const char *name,
struct gdbarch *arch,
@ -86,16 +82,16 @@ static void
skip_file_command (char *arg, int from_tty)
{
struct skiplist_entry *e;
struct symtab *symtab;
const struct symtab *symtab;
int pending = 0;
char *filename = 0;
const char *filename = NULL;
/* If no argument was given, try to default to the last
displayed codepoint. */
if (arg == 0)
if (arg == NULL)
{
symtab = get_last_displayed_symtab ();
if (symtab == 0)
if (symtab == NULL)
error (_("No default file now."));
else
filename = symtab->filename;
@ -103,7 +99,7 @@ skip_file_command (char *arg, int from_tty)
else
{
symtab = lookup_symtab (arg);
if (symtab == 0)
if (symtab == NULL)
{
fprintf_filtered (gdb_stderr, _("No source file named %s.\n"), arg);
if (!nquery (_("\
@ -121,7 +117,7 @@ Ignore file pending future shared library load? ")))
e->filename = xstrdup (filename);
e->enabled = 1;
e->pending = pending;
if (symtab != 0)
if (symtab != NULL)
e->gdbarch = get_objfile_arch (symtab->objfile);
add_skiplist_entry (e);
@ -136,14 +132,15 @@ skip_function_command (char *arg, int from_tty)
const char *name = NULL;
/* Default to the current function if no argument is given. */
if (arg == 0)
if (arg == NULL)
{
CORE_ADDR pc;
if (!last_displayed_sal_is_valid ())
error (_("No default function now."));
pc = get_last_displayed_addr ();
if (!find_pc_partial_function (pc, &name, &func_pc, 0))
if (!find_pc_partial_function (pc, &name, &func_pc, NULL))
{
error (_("No function found containing current program point %s."),
paddress (get_current_arch (), pc));
@ -152,16 +149,16 @@ skip_function_command (char *arg, int from_tty)
}
else
{
/* Decode arg. We set funfirstline=1 so decode_line_1 will give us the
/* Decode arg. We set funfirstline = 1 so decode_line_1 will give us the
first line of the function specified, if it can, and so that we'll
reject variable names and the like. */
char *orig_arg = arg; /* decode_line_1 modifies the arg pointer. */
volatile struct gdb_exception decode_exception;
struct symtabs_and_lines sals = { 0 };
struct symtabs_and_lines sals = { NULL };
TRY_CATCH (decode_exception, RETURN_MASK_ERROR)
{
sals = decode_line_1 (&arg, DECODE_LINE_FUNFIRSTLINE, 0, 0);
sals = decode_line_1 (&arg, DECODE_LINE_FUNFIRSTLINE, NULL, 0);
}
if (decode_exception.reason < 0)
@ -176,7 +173,7 @@ skip_function_command (char *arg, int from_tty)
Ignore function pending future shared library load? ")))
{
/* Add the pending skiplist entry. */
skip_function_pc (0, orig_arg, 0, 1);
skip_function_pc (0, orig_arg, NULL, 1);
}
return;
@ -184,7 +181,7 @@ Ignore function pending future shared library load? ")))
if (sals.nelts > 1)
error (_("Specify just one function at a time."));
if (strlen (arg) != 0)
if (*arg != 0)
error (_("Junk at end of arguments."));
/* The pc decode_line_1 gives us is the first line of the function,
@ -196,7 +193,7 @@ Ignore function pending future shared library load? ")))
CORE_ADDR func_start = 0;
struct gdbarch *arch = get_sal_arch (sal);
if (!find_pc_partial_function (pc, &name, &func_start, 0))
if (!find_pc_partial_function (pc, &name, &func_start, NULL))
{
error (_("No function found containing program point %s."),
paddress (arch, pc));
@ -221,7 +218,7 @@ skip_info (char *arg, int from_tty)
/* Count the number of rows in the table and see if we need space for a
64-bit address anywhere. */
ALL_SKIPLIST_ENTRIES (e)
if (arg == 0 || number_is_in_list (arg, e->number))
if (arg == NULL || number_is_in_list (arg, e->number))
{
num_printable_entries++;
if (e->gdbarch && gdbarch_addr_bit (e->gdbarch) > 32)
@ -230,7 +227,7 @@ skip_info (char *arg, int from_tty)
if (num_printable_entries == 0)
{
if (arg == 0)
if (arg == NULL)
ui_out_message (current_uiout, 0, _("\
Not skipping any files or functions.\n"));
else
@ -266,16 +263,16 @@ Not skipping any files or functions.\n"));
struct cleanup *entry_chain;
QUIT;
if (arg != 0 && !number_is_in_list (arg, e->number))
if (arg != NULL && !number_is_in_list (arg, e->number))
continue;
entry_chain = make_cleanup_ui_out_tuple_begin_end (current_uiout,
"blklst-entry");
ui_out_field_int (current_uiout, "number", e->number); /* 1 */
if (e->function_name != 0)
if (e->function_name != NULL)
ui_out_field_string (current_uiout, "type", "function"); /* 2 */
else if (e->filename != 0)
else if (e->filename != NULL)
ui_out_field_string (current_uiout, "type", "file"); /* 2 */
else
internal_error (__FILE__, __LINE__, _("\
@ -295,30 +292,30 @@ Skiplist entry should have either a filename or a function name."));
ui_out_field_string (current_uiout, "addr", ""); /* 4 */
}
if (!e->pending && e->function_name != 0)
if (!e->pending && e->function_name != NULL)
{
struct symbol *sym;
gdb_assert (e->pc != 0);
sym = find_pc_function (e->pc);
if (sym)
if (sym != NULL)
ui_out_field_fmt (current_uiout, "what", "%s at %s:%d",
sym->ginfo.name,
SYMBOL_SYMTAB (sym)->filename,
sym->line);
sym->line); /* 5 */
else
ui_out_field_string (current_uiout, "what", "?");
ui_out_field_string (current_uiout, "what", "?"); /* 5 */
}
else if (e->pending && e->function_name != 0)
else if (e->pending && e->function_name != NULL)
{
ui_out_field_fmt (current_uiout, "what", "%s (PENDING)",
e->function_name);
e->function_name); /* 5 */
}
else if (!e->pending && e->filename != 0)
ui_out_field_string (current_uiout, "what", e->filename);
else if (e->pending && e->filename != 0)
else if (!e->pending && e->filename != NULL)
ui_out_field_string (current_uiout, "what", e->filename); /* 5 */
else if (e->pending && e->filename != NULL)
ui_out_field_fmt (current_uiout, "what", "%s (PENDING)",
e->filename);
e->filename); /* 5 */
ui_out_text (current_uiout, "\n");
do_cleanups (entry_chain);
@ -334,7 +331,7 @@ skip_enable_command (char *arg, int from_tty)
int found = 0;
ALL_SKIPLIST_ENTRIES (e)
if (arg == 0 || number_is_in_list (arg, e->number))
if (arg == NULL || number_is_in_list (arg, e->number))
{
e->enabled = 1;
found = 1;
@ -351,7 +348,7 @@ skip_disable_command (char *arg, int from_tty)
int found = 0;
ALL_SKIPLIST_ENTRIES (e)
if (arg == 0 || number_is_in_list (arg, e->number))
if (arg == NULL || number_is_in_list (arg, e->number))
{
e->enabled = 0;
found = 1;
@ -369,9 +366,9 @@ skip_delete_command (char *arg, int from_tty)
b_prev = 0;
ALL_SKIPLIST_ENTRIES_SAFE (e, temp)
if (arg == 0 || number_is_in_list (arg, e->number))
if (arg == NULL || number_is_in_list (arg, e->number))
{
if (b_prev != 0)
if (b_prev != NULL)
b_prev->next = e->next;
else
skiplist_entry_chain = e->next;
@ -429,7 +426,7 @@ add_skiplist_entry (struct skiplist_entry *e)
skiplist entries will be in numerical order. */
e1 = skiplist_entry_chain;
if (e1 == 0)
if (e1 == NULL)
skiplist_entry_chain = e;
else
{
@ -446,7 +443,7 @@ function_pc_is_marked_for_skip (CORE_ADDR pc)
{
int searched_for_sal = 0;
struct symtab_and_line sal;
char *filename = NULL;
const char *filename = NULL;
struct skiplist_entry *e;
ALL_SKIPLIST_ENTRIES (e)
@ -458,18 +455,17 @@ function_pc_is_marked_for_skip (CORE_ADDR pc)
if (e->pc != 0 && pc == e->pc)
return 1;
if (e->filename != 0)
if (e->filename != NULL)
{
/* Get the filename corresponding to this pc, if we haven't
* yet. */
/* Get the filename corresponding to this pc, if we haven't yet. */
if (!searched_for_sal)
{
sal = find_pc_line (pc, 0);
if (sal.symtab != 0)
if (sal.symtab != NULL)
filename = sal.symtab->filename;
searched_for_sal = 1;
}
if (filename != 0 && strcmp (filename, e->filename) == 0)
if (filename != NULL && strcmp (filename, e->filename) == 0)
return 1;
}
}
@ -478,6 +474,7 @@ function_pc_is_marked_for_skip (CORE_ADDR pc)
}
/* Re-set the skip list after symbols have been re-loaded. */
void
skip_re_set (void)
{
@ -485,13 +482,14 @@ skip_re_set (void)
ALL_SKIPLIST_ENTRIES (e)
{
if (e->filename != 0)
if (e->filename != NULL)
{
/* If it's an entry telling us to skip a file, but the entry is
currently pending a solib load, let's see if we now know
about the file. */
struct symtab *symtab = lookup_symtab (e->filename);
if (symtab != 0)
const struct symtab *symtab = lookup_symtab (e->filename);
if (symtab != NULL)
{
xfree (e->filename);
e->filename = xstrdup (symtab->filename);
@ -503,19 +501,20 @@ skip_re_set (void)
e->pending = 1;
}
}
else if (e->function_name != 0)
else if (e->function_name != NULL)
{
char *func_name = e->function_name;
struct symtabs_and_lines sals = { 0 };
struct symtabs_and_lines sals = { NULL };
volatile struct gdb_exception decode_exception;
TRY_CATCH (decode_exception, RETURN_MASK_ERROR)
{
sals = decode_line_1 (&func_name, DECODE_LINE_FUNFIRSTLINE, 0, 0);
sals = decode_line_1 (&func_name, DECODE_LINE_FUNFIRSTLINE, NULL,
0);
}
if (decode_exception.reason >= 0
&& sals.nelts == 1 && strlen (func_name) == 0)
&& sals.nelts == 1 && *func_name == 0)
{
struct symtab_and_line sal = sals.sals[0];
CORE_ADDR pc = sal.pc;
@ -523,7 +522,7 @@ skip_re_set (void)
struct gdbarch *arch = get_sal_arch (sal);
const char *func_name;
if (find_pc_partial_function (pc, &func_name, &func_start, 0))
if (find_pc_partial_function (pc, &func_name, &func_start, NULL))
{
e->pending = 0;
e->function_name = xstrdup (func_name);