This is only used on Apple and Unix-like machines, so we can enclose the
prototype with an ifdef like the implementation is. This prevents
false-positives about an unimplemented function prototype.
Files cannot be given a different file name, only moved across
directories.
Add a test for that behaviour and fix the existing
RenameWithExistingTargetFile test.
Now that all FS functions that create new inodes are properly
implemented, we can make GetMetadata actually return correct file
metadata rather than giving fixed information. The hack for the DQX
installer can also be removed now since our ES and FS keep track of
caller UID/GIDs now.
With the CreateFile/CreateDirectory fix and this commit, we can
finally return correct results in ReadDirectory and the sorting
hack -- whose purpose was to prevent certain versions of the
System Menu from crashing -- can be removed too.
CreateDirectory does not create missing parent directories. If that
behaviour is desired, CreateFullPath should be used instead.
(These small misuses went unnoticed since the previous implementation
of CreateDirectory automatically created parent directories.)
Previously, the FS root directory would get created as a side
effect of calling CreateDirectory during boot (since the
implementation was sloppy and used File::CreateFullDir).
Since CreateDirectory no longer does that, it is necessary to ensure
that the FS root directory does exist by creating it explicitly.
Some official titles rely on implementation details of Nintendo's
FS sysmodule and will not work properly if those are changed.
Notably, some games and older versions of the System Menu appear
to be relying on the order of files returned by FS::ReadDirectory
and will either fail to find their save data (for Bolt) or
outright crash (for the System Menu).
Some titles also actually expect filesystem metadata to be correct.
One title that has been confirmed to do this is DQX, which generates
paths based on the GID of files within its own title directory.
While it is easy to make workarounds for these issues -- and in fact
we already do have some for the sysmenu and DQX, having hacks
is obviously nonideal and adding yet another hack would be required
to fix Bolt -- one that would be even uglier.
Furthermore, while it is currently unknown whether any official
title cares about permissions, the lack of FS metadata means that
we are unable to implement them if that turns out to be desirable
or necessary.
By adding a FST, we can implement things correctly and solve all
those problems without hacks.
Apart from DQX, the sysmenu and Bolt, this changeset also fixes
the Photo Channel complaining about corrupted system files
on the initial launch.
This first commit adds the basic structures and functions that
are necessary to load, save, query and update our version of the FST.
For simplicity, a binary format that is inspired from Nintendo's FST
structure was chosen for serialization. It is not expected to ever
receive an update.
PS: an update on the NAND image backend:
A long time ago I had planned to add another FS backend which would
be using a NAND image/blob as the storage. While I have already
written an implementation that has been tested, solves all the
aforementioned issues and more, produces images that are fully
compatible with IOS's FS driver, I feel like NAND images raise too
many issues: savestate sizes, code complexity and maintenance cost.
Since many fixes and additions that are part of that implementation
(e.g. FS timings, utility structures, FST) have already been merged
or will be submitted as part of this changeset, I will likely not
submit the branch.
Migrates the shader generator off the use of a global array, eliminating
the use of some global state. This also allows us to move the shader
generation over to using fmt in a subsequent change.
Add a function that safely returns whether a character is printable
i.e. whether 0x20 <= c <= 0x7e is true.
This is done in several places in our codebase and it's easy to run
into undefined behaviour if the C version defined in <cctype>
is used instead of this one, since its behaviour is undefined
if the character is not representable as an unsigned char.
This fixes MemoryViewWidget.
This is an alternative to PR 8557 and PR 8558. The way this PR solves
the problem is essentially the same as what we had before PR 8394
(except the code we had back then only worked because it was broken).
Currently, we do not display every second frame in 25fps/30fps games
which run to vsync. This improves performance as there's less rendering
for the GPU to perform, but when combined with vsync, could cause frame
pacing issues.
This commit adds an option to force every frame generated by the console
to be displayed to the host, which may improve pacing for these games.
This works around Linux drivers for DS4 (Playstation 4) controllers splitting the device into three separate event nodes which makes configuration difficult.
To prevent collisions of input names in combined devices more descriptive names are now used when possible.
Due to the way the ModRM encoding works on x86, memory addressing
combinations involving RBP or R13 need an additional byte for an 8-bit
displacement of zero.
However, this was also applied in cases where it is unnecessary,
effectively wasting a byte.
- MatR with RSP or R12
8B 44 24 00 mov eax,dword ptr [rsp]
8B 04 24 mov eax,dword ptr [rsp]
- MRegSum with base != RBP or R13
46 8D 7C 37 00 lea r15d,[rdi+r14]
46 8D 3C 37 lea r15d,[rdi+r14]
- MComplex without offset
8B 4C CA 00 mov ecx,dword ptr [rdx+rcx*8]
8B 0C CA mov ecx,dword ptr [rdx+rcx*8]
Test the behavior of OpArg::WriteRest by using MOV with the various
addressing modes (MatR, MRegSum, etc.) in the source operand.
Both the instruction and the instruction length are validated.
This updates the lint script to require clang-format 9 and reformats
existing source code. Since VS2019 ships with clang-format 9 this
should make auto reformats less painful.
This also updates the clang-format configuration to set
BraceWrapping.AfterCaseLabel to true to ensure consistent brace
style; otherwise clang-format 9+ defaults to putting braces on
the same line as switch case labels.
Was checking over this old code, and saw a comment calling me out for a lack of documentation.
It might be half a decade late, but better late then never.
The old logic would always emit LEA when both sources are in a register
and OE is disabled. However, ADD is still preferable when one of the
sources matches the destination.
Before:
45 8D 6C 35 00 lea r13d,[r13+rsi]
After:
44 03 EE add r13d,esi
The ES sysmodule in IOS62 (v6430) has an exception for the
Wii U Transfer Tool in the SetUid function.
If the active title is the Wii U Transfer Tool, then calling SetUid
is always allowed. (The UID is still checked first, though.)
Fixes https://bugs.dolphin-emu.org/issues/10985
Partitions are Wii-exclusive, and don't happen at the DVDInterface level in
IOS. This isn't quite the cleanest fix, but it gets rid of the assumption that
a partition is open on starting the game at least.
The various ioctls sometimes have different arguments than the DI command
registers, though they generally overlap. There are also a bunch of ioctls
that don't even normally go into DVDInterface, just returning various data.
Some of the implemented ioctls are new to Dolphin.
A small, nonexhaustive set of warning fixes. The DiscIO Volume change
is a workaround for a GCC bug [1] that causes returning an unengaged
std::optional to emit annoying -Wmaybe-uninitialized warnings.
This last change alone fixes pages upon pages of warnings since
Volume.h is included from several files.
-Wstringop-truncation is another irrelevant warning for us, but
unfortunately there seems to be no way to disable it without
adding ugly pragmas wherever the warning appears.
- Refactor the Config::System::Main check so we check system once,
then we check for the section.
- Use an std::array<> instead of std::vector<>.
- Use an array of pointers instead of an array of ConfigLocation.
The latter contains two std::string objects, whereas pointers
are only 8 bytes (on 64-bit).
Code size comparison: (64-bit Linux, gcc-9.2.0, release build)
text data bss dec hex filename
16136 0 40 16176 3f30 IsSettingSaveable.cpp.o [before]
3933 720 0 4653 122d IsSettingSaveable.cpp.o [after]
-12203 +720 -40 -11523 -2d03 Difference
NOTE: The explicit std::string() conversions later are needed. Otherwise,
gcc-9.2.0 throws all sorts of errors because it can't find a matching
operator+() function.
"ppcState{}" is stored in the .data segment, which means the full ~4 MB
is stored in the executable.
"ppcState" is stored in the .bss segment, which means it only stores a
note that tells it to allocate and zero ~4 MB at runtime.
string_view is a thin wrapper around C strings, so it's more efficient
for constant strings than C++ strings.
The unordered_set<> also adds extra runtime overhead. For small arrays,
a simple linear search works. For larger arrays, std::binary_search()
works better than linear but without the unordered_set<> overhead.
ShouldBeDualLayer(): Removed a duplicate "SK8X52" entry.
This was a huge speedup with disabled fastmem, but it still requires the fastmem arena.
So let's disable it for now, even if this commit has a huge performance hit with disabled fastmem.
Vladimir Serbinenko