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Kernel: Switch singletons to use new Singleton class

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MemoryManager cannot use the Singleton class because
MemoryManager::initialize is called before the global constructors
are run. That caused the Singleton to be re-initialized, causing
it to create another MemoryManager instance.

Fixes #3226
This commit is contained in:
Tom 2020-08-24 19:35:19 -06:00 • committed by Andreas Kling
parent ba6e4fb77f
commit d89582880e
46 changed files with 221 additions and 170 deletions
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51
Kernel/Devices/VMWareBackdoor.cpp
View file

@ -25,6 +25,8 @@
*/
#include <AK/Assertions.h>
#include <AK/OwnPtr.h>
#include <AK/Singleton.h>
#include <AK/String.h>
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/CommandLine.h>
@ -80,33 +82,40 @@ inline void vmware_high_bandwidth_get(VMWareCommand& command)
: "+a"(command.ax), "+b"(command.bx), "+c"(command.cx), "+d"(command.dx), "+S"(command.si), "+D"(command.di));
}
static VMWareBackdoor* s_vmware_backdoor;
static bool detect_presence()
class VMWareBackdoorDetector
{
VMWareCommand command;
command.bx = ~VMWARE_MAGIC;
command.command = VMWARE_CMD_GETVERSION;
vmware_out(command);
if (command.bx != VMWARE_MAGIC || command.ax == 0xFFFFFFFF)
return false;
return true;
}
public:
VMWareBackdoorDetector()
{
if (detect_presence())
m_backdoor = make<VMWareBackdoor>();
}
VMWareBackdoor* VMWareBackdoor::initialize()
{
ASSERT(s_vmware_backdoor == nullptr);
if (!detect_presence())
return nullptr;
VMWareBackdoor* get_instance()
{
return m_backdoor.ptr();
}
s_vmware_backdoor = new VMWareBackdoor;
klog() << "VMWare backdoor opened.";
return s_vmware_backdoor;
}
private:
static bool detect_presence()
{
VMWareCommand command;
command.bx = ~VMWARE_MAGIC;
command.command = VMWARE_CMD_GETVERSION;
vmware_out(command);
if (command.bx != VMWARE_MAGIC || command.ax == 0xFFFFFFFF)
return false;
return true;
}
OwnPtr<VMWareBackdoor> m_backdoor;
};
static AK::Singleton<VMWareBackdoorDetector> s_vmware_backdoor;
VMWareBackdoor* VMWareBackdoor::the()
{
return s_vmware_backdoor;
return s_vmware_backdoor->get_instance();
}
VMWareBackdoor::VMWareBackdoor()