Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 167 insertions, 0 deletions

diff --git a/ipc/glue/SharedMemoryBasic_mach.mm b/ipc/glue/SharedMemoryBasic_mach.mm
new file mode 100644
index 0000000000..af0d6e6245
--- /dev/null
+++ b/ipc/glue/SharedMemoryBasic_mach.mm
@@ -0,0 +1,167 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* 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/. */
+
+#include <map>
+
+#include <mach/vm_map.h>
+#include <mach/mach_port.h>
+#if defined(XP_IOS)
+#  include <mach/vm_map.h>
+#  define mach_vm_address_t vm_address_t
+#  define mach_vm_map vm_map
+#  define mach_vm_read vm_read
+#  define mach_vm_region_recurse vm_region_recurse_64
+#  define mach_vm_size_t vm_size_t
+#else
+#  include <mach/mach_vm.h>
+#endif
+#include <pthread.h>
+#include <unistd.h>
+#include "SharedMemoryBasic.h"
+
+#include "mozilla/IntegerPrintfMacros.h"
+#include "mozilla/Printf.h"
+#include "mozilla/StaticMutex.h"
+
+#ifdef DEBUG
+#  define LOG_ERROR(str, args...)                                  \
+    PR_BEGIN_MACRO                                                 \
+    mozilla::SmprintfPointer msg = mozilla::Smprintf(str, ##args); \
+    NS_WARNING(msg.get());                                         \
+    PR_END_MACRO
+#else
+#  define LOG_ERROR(str, args...) \
+    do { /* nothing */            \
+    } while (0)
+#endif
+
+namespace mozilla {
+namespace ipc {
+
+SharedMemoryBasic::SharedMemoryBasic()
+    : mPort(MACH_PORT_NULL), mMemory(nullptr), mOpenRights(RightsReadWrite) {}
+
+SharedMemoryBasic::~SharedMemoryBasic() {
+  Unmap();
+  CloseHandle();
+}
+
+bool SharedMemoryBasic::SetHandle(Handle aHandle, OpenRights aRights) {
+  MOZ_ASSERT(mPort == MACH_PORT_NULL, "already initialized");
+
+  mPort = std::move(aHandle);
+  mOpenRights = aRights;
+  return true;
+}
+
+static inline void* toPointer(mach_vm_address_t address) {
+  return reinterpret_cast<void*>(static_cast<uintptr_t>(address));
+}
+
+static inline mach_vm_address_t toVMAddress(void* pointer) {
+  return static_cast<mach_vm_address_t>(reinterpret_cast<uintptr_t>(pointer));
+}
+
+bool SharedMemoryBasic::Create(size_t size) {
+  MOZ_ASSERT(mPort == MACH_PORT_NULL, "already initialized");
+
+  memory_object_size_t memoryObjectSize = round_page(size);
+
+  kern_return_t kr = mach_make_memory_entry_64(mach_task_self(), &memoryObjectSize, 0,
+                                               MAP_MEM_NAMED_CREATE | VM_PROT_DEFAULT,
+                                               getter_Transfers(mPort), MACH_PORT_NULL);
+  if (kr != KERN_SUCCESS || memoryObjectSize < round_page(size)) {
+    LOG_ERROR("Failed to make memory entry (%zu bytes). %s (%x)\n", size, mach_error_string(kr),
+              kr);
+    CloseHandle();
+    return false;
+  }
+
+  Created(size);
+  return true;
+}
+
+bool SharedMemoryBasic::Map(size_t size, void* fixed_address) {
+  MOZ_ASSERT(mMemory == nullptr);
+
+  if (MACH_PORT_NULL == mPort) {
+    return false;
+  }
+
+  kern_return_t kr;
+  mach_vm_address_t address = toVMAddress(fixed_address);
+
+  vm_prot_t vmProtection = VM_PROT_READ;
+  if (mOpenRights == RightsReadWrite) {
+    vmProtection |= VM_PROT_WRITE;
+  }
+
+  kr = mach_vm_map(mach_task_self(), &address, round_page(size), 0,
+                   fixed_address ? VM_FLAGS_FIXED : VM_FLAGS_ANYWHERE, mPort.get(), 0, false,
+                   vmProtection, vmProtection, VM_INHERIT_NONE);
+  if (kr != KERN_SUCCESS) {
+    if (!fixed_address) {
+      LOG_ERROR("Failed to map shared memory (%zu bytes) into %x, port %x. %s (%x)\n", size,
+                mach_task_self(), mach_port_t(mPort.get()), mach_error_string(kr), kr);
+    }
+    return false;
+  }
+
+  if (fixed_address && fixed_address != toPointer(address)) {
+    kr = vm_deallocate(mach_task_self(), address, size);
+    if (kr != KERN_SUCCESS) {
+      LOG_ERROR("Failed to unmap shared memory at unsuitable address "
+                "(%zu bytes) from %x, port %x. %s (%x)\n",
+                size, mach_task_self(), mach_port_t(mPort.get()), mach_error_string(kr), kr);
+    }
+    return false;
+  }
+
+  mMemory = toPointer(address);
+  Mapped(size);
+  return true;
+}
+
+void* SharedMemoryBasic::FindFreeAddressSpace(size_t size) {
+  mach_vm_address_t address = 0;
+  size = round_page(size);
+  if (mach_vm_map(mach_task_self(), &address, size, 0, VM_FLAGS_ANYWHERE, MEMORY_OBJECT_NULL, 0,
+                  false, VM_PROT_NONE, VM_PROT_NONE, VM_INHERIT_NONE) != KERN_SUCCESS ||
+      vm_deallocate(mach_task_self(), address, size) != KERN_SUCCESS) {
+    return nullptr;
+  }
+  return toPointer(address);
+}
+
+auto SharedMemoryBasic::CloneHandle() -> Handle {
+  return mozilla::RetainMachSendRight(mPort.get());
+}
+
+void SharedMemoryBasic::Unmap() {
+  if (!mMemory) {
+    return;
+  }
+  vm_address_t address = toVMAddress(mMemory);
+  kern_return_t kr = vm_deallocate(mach_task_self(), address, round_page(mMappedSize));
+  if (kr != KERN_SUCCESS) {
+    LOG_ERROR("Failed to deallocate shared memory. %s (%x)\n", mach_error_string(kr), kr);
+    return;
+  }
+  mMemory = nullptr;
+}
+
+void SharedMemoryBasic::CloseHandle() {
+  if (mPort) {
+    mPort = nullptr;
+    mOpenRights = RightsReadWrite;
+  }
+}
+
+bool SharedMemoryBasic::IsHandleValid(const Handle& aHandle) const { return aHandle != nullptr; }
+
+}  // namespace ipc
+}  // namespace mozilla