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sys_vm: Limit total process vsize to 256MB (#8431)

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Eladash 2020-06-14 17:27:34 +03:00 • committed by GitHub
commit 5430892052
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1 changed files with 23 additions and 0 deletions
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23
rpcs3/Emu/Cell/lv2/sys_vm.cpp
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@ -28,6 +28,11 @@ sys_vm_t::~sys_vm_t()
LOG_CHANNEL(sys_vm); LOG_CHANNEL(sys_vm);
struct sys_vm_global_t
{
atomic_t<u32> total_vsize = 0;
};
error_code sys_vm_memory_map(ppu_thread& ppu, u32 vsize, u32 psize, u32 cid, u64 flag, u64 policy, vm::ptr<u32> addr) error_code sys_vm_memory_map(ppu_thread& ppu, u32 vsize, u32 psize, u32 cid, u64 flag, u64 policy, vm::ptr<u32> addr)
{ {
vm::temporary_unlock(ppu); vm::temporary_unlock(ppu);
@ -48,8 +53,24 @@ error_code sys_vm_memory_map(ppu_thread& ppu, u32 vsize, u32 psize, u32 cid, u64
return CELL_ESRCH; return CELL_ESRCH;
} }
if (!g_fxo->get<sys_vm_global_t>()->total_vsize.fetch_op([vsize](u32& size)
{
// A single process can hold up to 256MB of virtual memory, even on DECR
if (0x10000000 - size < vsize)
{
return false;
}
size += vsize;
return true;
}).second)
{
return CELL_EBUSY;
}
if (!ct->take(psize)) if (!ct->take(psize))
{ {
g_fxo->get<sys_vm_global_t>()->total_vsize -= vsize;
return CELL_ENOMEM; return CELL_ENOMEM;
} }
@ -67,6 +88,7 @@ error_code sys_vm_memory_map(ppu_thread& ppu, u32 vsize, u32 psize, u32 cid, u64
} }
ct->used -= psize; ct->used -= psize;
g_fxo->get<sys_vm_global_t>()->total_vsize -= vsize;
return CELL_ENOMEM; return CELL_ENOMEM;
} }
@ -100,6 +122,7 @@ error_code sys_vm_unmap(ppu_thread& ppu, u32 addr)
// Return memory // Return memory
vmo.ct->used -= vmo.psize; vmo.ct->used -= vmo.psize;
g_fxo->get<sys_vm_global_t>()->total_vsize -= vmo.size;
}); });
if (!vmo) if (!vmo)