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Fix bugs listed by clang's static analyzer

Browse source 
A few pedantic changes and unused variables (1-4), and genuine bugs (5,
6).

The reports with the corresponding files and lines numbers are as
follows.

1. backend/libinput/tablet_pad.c@31,44,57
"Allocator sizeof operand mismatch"
"Result of 'calloc' is converted to a pointer of type 'unsigned int',
which is incompatible with sizeof operand type 'int'"

2. types/tablet_v2/wlr_tablet_v2_pad.c@371
"Allocator sizeof operand mismatch"
"Result of 'calloc' is converted to a pointer of type 'uint32_t', which
is incompatible with sizeof operand type 'int'"

3. types/wlr_cursor.c@335
"Dead initialization"
"Value stored to 'dx'/'dy' during its initialization is never read"

4. rootston/xdg_shell.c@510
"Dead initialization"
"Value stored to 'desktop' during its initialization is never read"

5. types/tablet_v2/wlr_tablet_v2_pad.c@475
"Dereference of null pointer"
"Access to field 'strips' results in a dereference of a null pointer
(loaded from field 'current_client')"

The boolean logic was incorrect (c.f. the check in the following
function).

6. examples/idle.c@163,174,182
"Uninitialized argument value"
"1st function call argument is an uninitialized value"

If close_timeout != 0, but simulate_activity_timeout >= close_timeout,
the program would segfault at pthread_cancel(t1).
This commit is contained in:
random human 2018-08-31 16:11:46 +05:30 • committed by emersion
parent 2f48453718
commit 8589ae19de
5 changed files with 22 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

6
backend/libinput/tablet_pad.c
View file

@ -28,7 +28,7 @@ static void add_pad_group_from_libinput(struct wlr_tablet_pad *pad,
++group->ring_count;
}
}
group->rings = calloc(sizeof(int), group->ring_count);
group->rings = calloc(sizeof(unsigned int), group->ring_count);
size_t ring = 0;
for (size_t i = 0; i < pad->ring_count; ++i) {
if (libinput_tablet_pad_mode_group_has_ring(li_group, i)) {
@ -41,7 +41,7 @@ static void add_pad_group_from_libinput(struct wlr_tablet_pad *pad,
++group->strip_count;
}
}
group->strips = calloc(sizeof(int), group->strip_count);
group->strips = calloc(sizeof(unsigned int), group->strip_count);
size_t strip = 0;
for (size_t i = 0; i < pad->strip_count; ++i) {
if (libinput_tablet_pad_mode_group_has_strip(li_group, i)) {
@ -54,7 +54,7 @@ static void add_pad_group_from_libinput(struct wlr_tablet_pad *pad,
++group->button_count;
}
}
group->buttons = calloc(sizeof(int), group->button_count);
group->buttons = calloc(sizeof(unsigned int), group->button_count);
size_t button = 0;
for (size_t i = 0; i < pad->button_count; ++i) {
if (libinput_tablet_pad_mode_group_has_button(li_group, i)) {