mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-19 08:15:31 +00:00
8cbd18a166
Differential Revision: https://phabricator.services.mozilla.com/D45093 --HG-- extra : moz-landing-system : lando
112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_ipc_SharedMemoryBasic_mach_h
|
|
#define mozilla_ipc_SharedMemoryBasic_mach_h
|
|
|
|
#include "base/file_descriptor_posix.h"
|
|
#include "base/process.h"
|
|
|
|
#include "SharedMemory.h"
|
|
#include <mach/port.h>
|
|
#include "chrome/common/mach_ipc_mac.h"
|
|
|
|
#ifdef FUZZING
|
|
# include "SharedMemoryFuzzer.h"
|
|
#endif
|
|
|
|
//
|
|
// This is a low-level wrapper around platform shared memory. Don't
|
|
// use it directly; use Shmem allocated through IPDL interfaces.
|
|
//
|
|
|
|
class MachPortSender;
|
|
class ReceivePort;
|
|
|
|
namespace mozilla {
|
|
namespace ipc {
|
|
|
|
enum {
|
|
kGetPortsMsg = 1,
|
|
kSharePortsMsg,
|
|
kWaitForTexturesMsg,
|
|
kUpdateTextureLocksMsg,
|
|
kReturnIdMsg,
|
|
kReturnWaitForTexturesMsg,
|
|
kReturnPortsMsg,
|
|
kShutdownMsg,
|
|
kCleanupMsg,
|
|
};
|
|
|
|
struct MemoryPorts {
|
|
MachPortSender* mSender;
|
|
ReceivePort* mReceiver;
|
|
|
|
MemoryPorts() = default;
|
|
MemoryPorts(MachPortSender* sender, ReceivePort* receiver)
|
|
: mSender(sender), mReceiver(receiver) {}
|
|
};
|
|
|
|
class SharedMemoryBasic final : public SharedMemoryCommon<mach_port_t> {
|
|
public:
|
|
static void SetupMachMemory(pid_t pid, ReceivePort* listen_port,
|
|
MachPortSender* listen_port_ack,
|
|
MachPortSender* send_port,
|
|
ReceivePort* send_port_ack, bool pidIsParent);
|
|
|
|
static void CleanupForPid(pid_t pid);
|
|
static void CleanupForPidWithLock(pid_t pid);
|
|
|
|
static void Shutdown();
|
|
|
|
static bool SendMachMessage(pid_t pid, MachSendMessage& message,
|
|
MachReceiveMessage* response);
|
|
|
|
SharedMemoryBasic();
|
|
|
|
virtual bool SetHandle(const Handle& aHandle, OpenRights aRights) override;
|
|
|
|
virtual bool Create(size_t aNbytes) override;
|
|
|
|
virtual bool Map(size_t nBytes, void* fixed_address = nullptr) override;
|
|
|
|
virtual void CloseHandle() override;
|
|
|
|
virtual void* memory() const override {
|
|
#ifdef FUZZING
|
|
return SharedMemoryFuzzer::MutateSharedMemory(mMemory, mAllocSize);
|
|
#else
|
|
return mMemory;
|
|
#endif
|
|
}
|
|
|
|
virtual SharedMemoryType Type() const override { return TYPE_BASIC; }
|
|
|
|
static Handle NULLHandle() { return Handle(); }
|
|
|
|
static void* FindFreeAddressSpace(size_t aSize);
|
|
|
|
virtual bool IsHandleValid(const Handle& aHandle) const override;
|
|
|
|
virtual bool ShareToProcess(base::ProcessId aProcessId,
|
|
Handle* aNewHandle) override;
|
|
|
|
private:
|
|
~SharedMemoryBasic();
|
|
|
|
void Unmap();
|
|
mach_port_t mPort;
|
|
// Pointer to mapped region, null if unmapped.
|
|
void* mMemory;
|
|
// Access rights to map an existing region with.
|
|
OpenRights mOpenRights;
|
|
};
|
|
|
|
} // namespace ipc
|
|
} // namespace mozilla
|
|
|
|
#endif // ifndef mozilla_ipc_SharedMemoryBasic_mach_h
|