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Merge pull request #917 from lioncash/crash 

kernel/thread: Fix potential crashes introduced in 26de4bb5
This commit is contained in:
bunnei 2018-08-04 01:19:01 -04:00 committed by GitHub
parent 29f31356d8 e93fa7f2cc
commit d43dad001e
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 36 additions and 11 deletions
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34
src/core/hle/kernel/shared_memory.cpp
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@ -28,20 +28,32 @@ SharedPtr<SharedMemory> SharedMemory::Create(SharedPtr<Process> owner_process, u
shared_memory->permissions = permissions;
shared_memory->other_permissions = other_permissions;
auto& vm_manager = shared_memory->owner_process->vm_manager;
if (address == 0) {
shared_memory->backing_block = std::make_shared<std::vector<u8>>(size);
shared_memory->backing_block_offset = 0;
// The memory is already available and mapped in the owner process.
auto vma = vm_manager.FindVMA(address);
ASSERT_MSG(vma != vm_manager.vma_map.end(), "Invalid memory address");
ASSERT_MSG(vma->second.backing_block, "Backing block doesn't exist for address");
// Refresh the address mappings for the current process.
if (Core::CurrentProcess() != nullptr) {
Core::CurrentProcess()->vm_manager.RefreshMemoryBlockMappings(
shared_memory->backing_block.get());
}
} else {
auto& vm_manager = shared_memory->owner_process->vm_manager;
// The returned VMA might be a bigger one encompassing the desired address.
auto vma_offset = address - vma->first;
ASSERT_MSG(vma_offset + size <= vma->second.size,
"Shared memory exceeds bounds of mapped block");
// The memory is already available and mapped in the owner process.
auto vma = vm_manager.FindVMA(address);
ASSERT_MSG(vma != vm_manager.vma_map.end(), "Invalid memory address");
ASSERT_MSG(vma->second.backing_block, "Backing block doesn't exist for address");
// The returned VMA might be a bigger one encompassing the desired address.
auto vma_offset = address - vma->first;
ASSERT_MSG(vma_offset + size <= vma->second.size,
"Shared memory exceeds bounds of mapped block");
shared_memory->backing_block = vma->second.backing_block;
shared_memory->backing_block_offset = vma->second.offset + vma_offset;
}
shared_memory->backing_block = vma->second.backing_block;
shared_memory->backing_block_offset = vma->second.offset + vma_offset;
shared_memory->base_address = address;
return shared_memory;

11
src/core/hle/kernel/thread.cpp
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@ -339,6 +339,17 @@ ResultVal<SharedPtr<Thread>> Thread::Create(std::string name, VAddr entry_point,
tls_slots.emplace_back(0); // The page is completely available at the start
available_page = tls_slots.size() - 1;
available_slot = 0; // Use the first slot in the new page
// Allocate some memory from the end of the linear heap for this region.
const size_t offset = thread->tls_memory->size();
thread->tls_memory->insert(thread->tls_memory->end(), Memory::PAGE_SIZE, 0);
auto& vm_manager = owner_process->vm_manager;
vm_manager.RefreshMemoryBlockMappings(thread->tls_memory.get());
vm_manager.MapMemoryBlock(Memory::TLS_AREA_VADDR + available_page * Memory::PAGE_SIZE,
thread->tls_memory, 0, Memory::PAGE_SIZE,
MemoryState::ThreadLocal);
}
// Mark the slot as used

2
src/core/hle/kernel/thread.h
View File

@ -265,6 +265,8 @@ public:
private:
Thread();
~Thread() override;
std::shared_ptr<std::vector<u8>> tls_memory = std::make_shared<std::vector<u8>>();
};
/**