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Code Issues Releases Activity

Fix bug #13743 with crashes due to recursive add-text-properties.

Browse Source 
src/textprop.c (Fadd_text_properties, Fremove_text_properties)
 (Fremove_list_of_text_properties): Skip all of the intervals in
 the region between START and END that already have resp. don't
 have the requested properties, not just the first one.  Add
 assertions that the loop afterwards always modifies the
 properties.
This commit is contained in:
Eli Zaretskii 2013-02-25 18:13:42 +02:00
parent b5071fc755
commit 0248b0d70b
2 changed files with 75 additions and 59 deletions
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9
src/ChangeLog
View File

@ -1,3 +1,12 @@
2013-02-25 Eli Zaretskii <eliz@gnu.org>
* textprop.c (Fadd_text_properties, Fremove_text_properties)
(Fremove_list_of_text_properties): Skip all of the intervals in
the region between START and END that already have resp. don't
have the requested properties, not just the first one. Add
assertions that the loop afterwards always modifies the
properties. (Bug#13743)
2013-02-25 Stefan Monnier <monnier@iro.umontreal.ca>
* callint.c (Fcall_interactively): Use the right lexical environment

125
src/textprop.c
View File

@ -1133,6 +1133,7 @@ Return t if any property value actually changed, nil otherwise. */)
register ptrdiff_t s, len;
register int modified = 0;
struct gcpro gcpro1;
ptrdiff_t got;
properties = validate_plist (properties);
if (NILP (properties))
@ -1152,26 +1153,25 @@ Return t if any property value actually changed, nil otherwise. */)
and live buffers are always protected. */
GCPRO1 (properties);
/* If we're not starting on an interval boundary, we have to
split this interval. */
if (i->position != s)
/* If this interval already has the properties, we can skip it. */
if (interval_has_all_properties (properties, i))
{
/* If this interval already has the properties, we can
skip it. */
if (interval_has_all_properties (properties, i))
{
ptrdiff_t got = (LENGTH (i) - (s - i->position));
if (got >= len)
RETURN_UNGCPRO (Qnil);
len -= got;
i = next_interval (i);
}
else
{
unchanged = i;
i = split_interval_right (unchanged, s - unchanged->position);
copy_properties (unchanged, i);
}
got = LENGTH (i) - (s - i->position);
do {
if (got >= len)
RETURN_UNGCPRO (Qnil);
len -= got;
i = next_interval (i);
got = LENGTH (i);
} while (interval_has_all_properties (properties, i));
}
else if (i->position != s)
{
/* If we're not starting on an interval boundary, we have to
split this interval. */
unchanged = i;
i = split_interval_right (unchanged, s - unchanged->position);
copy_properties (unchanged, i);
}
if (BUFFERP (object))
@ -1195,7 +1195,8 @@ Return t if any property value actually changed, nil otherwise. */)
signal_after_change (XINT (start), XINT (end) - XINT (start),
XINT (end) - XINT (start));
return modified ? Qt : Qnil;
eassert (modified);
return Qt;
}
if (LENGTH (i) == len)
@ -1426,6 +1427,7 @@ Use `set-text-properties' if you want to remove all text properties. */)
register INTERVAL i, unchanged;
register ptrdiff_t s, len;
register int modified = 0;
ptrdiff_t got;
if (NILP (object))
XSETBUFFER (object, current_buffer);
@ -1437,26 +1439,25 @@ Use `set-text-properties' if you want to remove all text properties. */)
s = XINT (start);
len = XINT (end) - s;
if (i->position != s)
/* If there are no properties on this entire interval, return. */
if (! interval_has_some_properties (properties, i))
{
/* No properties on this first interval -- return if
it covers the entire region. */
if (! interval_has_some_properties (properties, i))
{
ptrdiff_t got = (LENGTH (i) - (s - i->position));
if (got >= len)
return Qnil;
len -= got;
i = next_interval (i);
}
/* Split away the beginning of this interval; what we don't
want to modify. */
else
{
unchanged = i;
i = split_interval_right (unchanged, s - unchanged->position);
copy_properties (unchanged, i);
}
got = (LENGTH (i) - (s - i->position));
do {
if (got >= len)
return Qnil;
len -= got;
i = next_interval (i);
got = LENGTH (i);
} while (! interval_has_some_properties (properties, i));
}
/* Split away the beginning of this interval; what we don't
want to modify. */
else if (i->position != s)
{
unchanged = i;
i = split_interval_right (unchanged, s - unchanged->position);
copy_properties (unchanged, i);
}
if (BUFFERP (object))
@ -1470,7 +1471,13 @@ Use `set-text-properties' if you want to remove all text properties. */)
if (LENGTH (i) >= len)
{
if (! interval_has_some_properties (properties, i))
return modified ? Qt : Qnil;
{
eassert (modified);
if (BUFFERP (object))
signal_after_change (XINT (start), XINT (end) - XINT (start),
XINT (end) - XINT (start));
return Qt;
}
if (LENGTH (i) == len)
{
@ -1512,6 +1519,7 @@ Return t if any property was actually removed, nil otherwise. */)
register ptrdiff_t s, len;
register int modified = 0;
Lisp_Object properties;
ptrdiff_t got;
properties = list_of_properties;
if (NILP (object))
@ -1524,26 +1532,25 @@ Return t if any property was actually removed, nil otherwise. */)
s = XINT (start);
len = XINT (end) - s;
if (i->position != s)
/* If there are no properties on the interval, return. */
if (! interval_has_some_properties_list (properties, i))
{
/* No properties on this first interval -- return if
it covers the entire region. */
if (! interval_has_some_properties_list (properties, i))
{
ptrdiff_t got = (LENGTH (i) - (s - i->position));
if (got >= len)
return Qnil;
len -= got;
i = next_interval (i);
}
/* Split away the beginning of this interval; what we don't
want to modify. */
else
{
unchanged = i;
i = split_interval_right (unchanged, s - unchanged->position);
copy_properties (unchanged, i);
}
got = (LENGTH (i) - (s - i->position));
do {
if (got >= len)
return Qnil;
len -= got;
i = next_interval (i);
got = LENGTH (i);
} while (! interval_has_some_properties_list (properties, i));
}
/* Split away the beginning of this interval; what we don't
want to modify. */
else if (i->position != s)
{
unchanged = i;
i = split_interval_right (unchanged, s - unchanged->position);
copy_properties (unchanged, i);
}
/* We are at the beginning of an interval, with len to scan.