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Fix Process object leak on emulation stop 

The Process object kept itself alive indefinitely because its handle_table
contains a SharedMemory object which owns a reference to the same Process object,
creating a circular ownership scenario.

Break that up by storing only a non-owning pointer in the SharedMemory object.
merge-requests/60/head
Jens Schmer 2018-12-10 19:42:01 +07:00
parent 9bae3ac33a
commit ae390ad5a2
3 changed files with 12 additions and 13 deletions
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6
src/core/hle/kernel/shared_memory.cpp
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@ -17,13 +17,13 @@ namespace Kernel {
SharedMemory::SharedMemory(KernelCore& kernel) : Object{kernel} {}
SharedMemory::~SharedMemory() = default;
SharedPtr<SharedMemory> SharedMemory::Create(KernelCore& kernel, SharedPtr<Process> owner_process,
u64 size, MemoryPermission permissions,
SharedPtr<SharedMemory> SharedMemory::Create(KernelCore& kernel, Process* owner_process, u64 size,
MemoryPermission permissions,
MemoryPermission other_permissions, VAddr address,
MemoryRegion region, std::string name) {
SharedPtr<SharedMemory> shared_memory(new SharedMemory(kernel));
shared_memory->owner_process = std::move(owner_process);
shared_memory->owner_process = owner_process;
shared_memory->name = std::move(name);
shared_memory->size = size;
shared_memory->permissions = permissions;

6
src/core/hle/kernel/shared_memory.h
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@ -45,8 +45,8 @@ public:
* linear heap.
* @param name Optional object name, used for debugging purposes.
*/
static SharedPtr<SharedMemory> Create(KernelCore& kernel, SharedPtr<Process> owner_process,
u64 size, MemoryPermission permissions,
static SharedPtr<SharedMemory> Create(KernelCore& kernel, Process* owner_process, u64 size,
MemoryPermission permissions,
MemoryPermission other_permissions, VAddr address = 0,
MemoryRegion region = MemoryRegion::BASE,
std::string name = "Unknown");
@ -139,7 +139,7 @@ private:
/// Permission restrictions applied to other processes mapping the block.
MemoryPermission other_permissions{};
/// Process that created this shared memory block.
SharedPtr<Process> owner_process;
Process* owner_process;
/// Address of shared memory block in the owner process if specified.
VAddr base_address = 0;
/// Name of shared memory object.

13
src/core/hle/kernel/svc.cpp
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@ -1487,9 +1487,9 @@ static ResultCode CreateTransferMemory(Handle* handle, VAddr addr, u64 size, u32
}
auto& kernel = Core::System::GetInstance().Kernel();
auto& handle_table = Core::CurrentProcess()->GetHandleTable();
const auto shared_mem_handle = SharedMemory::Create(
kernel, handle_table.Get<Process>(CurrentProcess), size, perms, perms, addr);
auto process = kernel.CurrentProcess();
auto& handle_table = process->GetHandleTable();
const auto shared_mem_handle = SharedMemory::Create(kernel, process, size, perms, perms, addr);
CASCADE_RESULT(*handle, handle_table.Create(shared_mem_handle));
return RESULT_SUCCESS;
@ -1599,10 +1599,9 @@ static ResultCode CreateSharedMemory(Handle* handle, u64 size, u32 local_permiss
}
auto& kernel = Core::System::GetInstance().Kernel();
auto& handle_table = Core::CurrentProcess()->GetHandleTable();
auto shared_mem_handle =
SharedMemory::Create(kernel, handle_table.Get<Process>(KernelHandle::CurrentProcess), size,
local_perms, remote_perms);
auto process = kernel.CurrentProcess();
auto& handle_table = process->GetHandleTable();
auto shared_mem_handle = SharedMemory::Create(kernel, process, size, local_perms, remote_perms);
CASCADE_RESULT(*handle, handle_table.Create(shared_mem_handle));
return RESULT_SUCCESS;