Some deployments of GCC won't link ASAN build without explicitly
specifying the library, and report:
"ASan runtime does not come first in initial library list;
you should either link runtime to your application or
manually preload it with LD_PRELOAD"
This commit includes the asan library by default for respective
builds.
Overrides previous, Windows-only hack used for the same purpose.
After initial window position, OS or window manager will take care of
emplacing window - this change takes care only of situation, when there
is NO initial window position.
Additionally, avoid re-setting the window size on every SetSDLWindowMode
call. This prevents a number of issues with the window being set to
incorrect size while switching between fullscreen and window.
Overally this change takes care of number of small issues happening on
macOS, Windows (without need for an ifdef), and Linux with KDE and MATE.
Also makes the behaviour more consistent for Gnome when starting dosbox
via XWayland.
SDL2 introduced a bunch of new events, that old SDL1.2 implementation
did not have. We probably should start using some of them…
It's also extremely helpful for comparing order/number of window events
arriving on different OSes and WMs.
Move the code to a separate function to make it easier to understand and
modify. Remove traces of windowresolution=X% support - this option
causes more harm than benefit.
Add bound checks to prevent user from setting up window size bigger then
configured display allows.
Changing this option dynamically via "config" built-in never worked, it
was always broken. Set it to change'able only on start, otherwise all
broken edge-cases would need to be fixed.
And do small cleanup in surrounding area.
Using normal2x has several undesired side-effects:
- slightly slower performance (I did some perf flamegraphs and turns out
scaler code is a significant bottleneck, even when using normal1x aka
none) - we should limit it as much as possible before addressing the
problem directly.
- it makes default glshader=sharp less precise
- it will negatively affect window resizing code
The 'optinfo' build target asks GCC to print optimizations that
could not be performed to local 'missing.txt' files; these will
appear in each repsective subdirectory having source files.
Both GCC and Clang will now print Verbose vectorization information
during the build process, often describing why vectorization
cannot be performed.
This commit also enables basic instruction and math vectorization
for both the 'release' and 'optinfo' targets. This includes making
use of altivec instructions (available on all powerpc processors),
and at a minimum sse4.2 on all x86_64 processors (circa-2008+ AMD
and Intel CPUs).
Vectorization is also re-enabled for GCC FDO builds, which would
otherwise be disabled when we switch to -O2 optimizations.
These are false-positive findings, but they touch flimsy part of code,
that could very easily break.
In all 4 cases the code looked like this:
uint8_t buf[MEM_PAGE_SIZE]; // old lines 600, 601
…
if (region.bytes > MEM_PAGE_SIZE)
toread = MEM_PAGE_SIZE; // old line 635
else
toread = region.bytes;
// assert toread <= MEM_PAGE_SIZE
if (toread < remain) {
MEM_BlockWrite(…, buf, toread);
} else {
MEM_BlockWrite(…, buf, remain);
MEM_BlockWrite(…, &buf[remain], toread - remain);
// ~~~~~~~~~~~~
// ^
// Coverity flags buffer overrun here
// when: toread == remain == MEM_PAGE_SIZE
// because buf has size MEM_PAGE_SIZE
//
// Sometimes it's MEM_BlockRead, but the problem is the same
}
In such cases, second MEM_BlockWrite is a no-op because
(toread - remain == 0), but Coverity did not reach this point in
analysis (Coverity is right to check the corner case, but didn't know,
that we can assert toread <= MEM_PAGE_SIZE, so the corner case is the
only value triggering this buffer overrun).
Change `if (toread < remain)` to `if (toread <= remain)`, so corner case
will never trigger second (no-op) MEM_BlockRead/Write inside `else`.
This property can be used for selecting which display dosbox should
initially use. Number 0 can be either primary display or left-most
display, depending on OS and user settings.
AUTOTYPE performs scripted keyboard entry into the running
DOS program.
It can be used to reliably skip intros, answer Q&A style questions
that some games ask on startup, or conduct a simple demo.
It allows for delaying input by any number of fractional seconds,
as well defining the pacing between keystrokes. It uses the
comma character "," to insert additional delays similar to modern
phone numbers.
It uses key_* names as defined by the mapper to avoid using SDL
scancodes[1], which are unstable across platforms. This approach
also allows the triggering of custom key bindings the use has
defined.
[1] https://wiki.libsdl.org/SDL_GetScancodeName
"Warning: The returned name is by design not stable across
platforms, e.g. the name for SDL_SCANCODE_LGUI is "Left GUI" under
Linux but "Left Windows" under Microsoft Windows, and some
scancodes like SDL_SCANCODE_NONUSBACKSLASH don't have any name at
all. There are even scancodes that share names, e.g.
SDL_SCANCODE_RETURN and SDL_SCANCODE_RETURN2 (both called
"Return"). This function is therefore unsuitable for creating a
stable cross-platform two-way mapping between strings and
scancodes."
