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Fix minor inaccuracy with VMM and mutexes

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This commit fixes a tiny inaccuracy with the VMM which was a problem with block insertion, The mutexes on the other hand had a minor issue regarding owner checks.
This commit is contained in:
◱ PixelyIon 2020-04-02 12:09:24 +05:30 committed by ◱ PixelyIon
parent 41ddaf7f33
commit f4968793b8
4 changed files with 16 additions and 25 deletions
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20
app/src/main/cpp/skyline/kernel/memory.cpp
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@ -93,6 +93,9 @@ namespace skyline::kernel {
}
void MemoryManager::InsertBlock(ChunkDescriptor *chunk, const BlockDescriptor block) {
if(chunk->address + chunk->size < block.address + block.size)
throw exception("InsertBlock: Inserting block past chunk end is not allowed");
for (auto iter = chunk->blockList.begin(); iter != chunk->blockList.end(); iter++) {
if (iter->address <= block.address) {
if ((iter->address + iter->size) > block.address) {
@ -107,23 +110,8 @@ namespace skyline::kernel {
iter->size = iter->address - block.address;
chunk->blockList.insert(std::next(iter), {block, endBlock});
}
} else if (std::next(iter) != chunk->blockList.end()) {
auto nextIter = std::next(iter);
auto nextEnd = nextIter->address + nextIter->size;
if(nextEnd > block.address) {
iter->size = block.address - iter->address;
nextIter->address = block.address + block.size;
nextIter->size = nextEnd - nextIter->address;
chunk->blockList.insert(nextIter, block);
} else {
throw exception("InsertBlock: Inserting block across more than one block is not allowed");
}
} else {
throw exception("InsertBlock: Inserting block with end past chunk end is not allowed");
return;
}
return;
}
}

2
app/src/main/cpp/skyline/kernel/svc.cpp
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@ -503,7 +503,7 @@ namespace skyline::kernel::svc {
if (state.process->MutexLock(address, ownerHandle))
state.logger->Debug("svcArbitrateLock: Locked mutex at 0x{:X}", address);
else
state.logger->Debug("svcArbitrateLock: Owner handle did not match current owner for mutex at 0x{:X}", address);
state.logger->Debug("svcArbitrateLock: Owner handle did not match current owner for mutex or didn't have waiter flag at 0x{:X}", address);
state.ctx->registers.w0 = constant::status::Success;
}

18
app/src/main/cpp/skyline/kernel/types/KProcess.cpp
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@ -85,7 +85,7 @@ namespace skyline::kernel::type {
Registers fregs{
.x0 = CLONE_THREAD | CLONE_SIGHAND | CLONE_PTRACE | CLONE_FS | CLONE_VM | CLONE_FILES | CLONE_IO,
.x1 = stackTop,
.x3 = tlsMem->Map(0, size, memory::Permission{ true, true, false }),
.x3 = tlsMem->Map(0, size, memory::Permission{true, true, false}),
.x8 = __NR_clone,
.x5 = reinterpret_cast<u64>(&guest::GuestEntry),
.x6 = entryPoint,
@ -203,10 +203,13 @@ namespace skyline::kernel::type {
auto mtx = GetPointer<u32>(address);
auto &mtxWaiters = mutexes[address];
u32 mtxExpected = 0;
if (__atomic_compare_exchange_n(mtx, &mtxExpected, (constant::MtxOwnerMask & state.thread->handle) | (mtxWaiters.empty() ? 0 : ~constant::MtxOwnerMask), false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST))
return true;
if (owner && (__atomic_load_n(mtx, __ATOMIC_SEQ_CST) != (owner | ~constant::MtxOwnerMask)))
if (mtxWaiters.empty()) {
u32 mtxExpected = 0;
if (__atomic_compare_exchange_n(mtx, &mtxExpected, (constant::MtxOwnerMask & state.thread->handle), false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST))
return true;
}
if (__atomic_load_n(mtx, __ATOMIC_SEQ_CST) != (owner | ~constant::MtxOwnerMask))
return false;
std::shared_ptr<WaitStatus> status;
@ -245,7 +248,7 @@ namespace skyline::kernel::type {
u32 mtxExpected = (constant::MtxOwnerMask & state.thread->handle) | ~constant::MtxOwnerMask;
if (!__atomic_compare_exchange_n(mtx, &mtxExpected, mtxDesired, false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)) {
mtxExpected = constant::MtxOwnerMask & state.thread->handle;
mtxExpected &= constant::MtxOwnerMask;
if (!__atomic_compare_exchange_n(mtx, &mtxExpected, mtxDesired, false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST))
return false;
@ -277,14 +280,15 @@ namespace skyline::kernel::type {
}
lock.unlock();
bool timedOut{};
bool timedOut{};
auto start = utils::GetTimeNs();
while (!status->flag)
if ((utils::GetTimeNs() - start) >= timeout)
timedOut = true;
lock.lock();
if (!status->flag)
timedOut = false;
else

1
app/src/main/java/emu/skyline/utility/LicenseDialog.kt
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@ -30,6 +30,5 @@ class LicenseDialog : DialogFragment() {
license_url.text = libraryUrl
license_content.text = libraryLicense
license_content.movementMethod = ScrollingMovementMethod()
}
}