HLE/Applets: Give each applet its own block of heap memory, and use that when creating the framebuffer shared memory block.

src/core/hle/kernel/shared_memory.cpp

@@ -58,6 +58,7 @@ SharedPtr<SharedMemory> SharedMemory::Create(SharedPtr<Process> owner_process, u
         // Copy it over to our own storage
         shared_memory->backing_block = std::make_shared<std::vector<u8>>(vma.backing_block->data() + vma.offset,
                                                                          vma.backing_block->data() + vma.offset + size);
+        shared_memory->backing_block_offset = 0;
         // Unmap the existing pages
         vm_manager.UnmapRange(address, size);
         // Map our own block into the address space
@@ -70,6 +71,22 @@ SharedPtr<SharedMemory> SharedMemory::Create(SharedPtr<Process> owner_process, u
     return shared_memory;
 }
 
+SharedPtr<SharedMemory> SharedMemory::CreateForApplet(std::shared_ptr<std::vector<u8>> heap_block, u32 offset, u32 size,
+                                                      MemoryPermission permissions, MemoryPermission other_permissions, std::string name) {
+    SharedPtr<SharedMemory> shared_memory(new SharedMemory);
+
+    shared_memory->owner_process = nullptr;
+    shared_memory->name = std::move(name);
+    shared_memory->size = size;
+    shared_memory->permissions = permissions;
+    shared_memory->other_permissions = other_permissions;
+    shared_memory->backing_block = heap_block;
+    shared_memory->backing_block_offset = offset;
+    shared_memory->base_address = Memory::HEAP_VADDR + offset;
+
+    return shared_memory;
+}
+
 ResultCode SharedMemory::Map(Process* target_process, VAddr address, MemoryPermission permissions,
         MemoryPermission other_permissions) {
 

src/core/hle/kernel/shared_memory.h

@@ -30,7 +30,7 @@ enum class MemoryPermission : u32 {
 class SharedMemory final : public Object {
 public:
     /**
-     * Creates a shared memory object
+     * Creates a shared memory object.
      * @param owner_process Process that created this shared memory object.
      * @param size Size of the memory block. Must be page-aligned.
      * @param permissions Permission restrictions applied to the process which created the block.
@@ -42,6 +42,18 @@ public:
     static SharedPtr<SharedMemory> Create(SharedPtr<Process> owner_process, u32 size, MemoryPermission permissions,
             MemoryPermission other_permissions, VAddr address = 0, MemoryRegion region = MemoryRegion::BASE, std::string name = "Unknown");
 
+    /**
+     * Creates a shared memory object from a block of memory managed by an HLE applet.
+     * @param heap_block Heap block of the HLE applet.
+     * @param offset The offset into the heap block that the SharedMemory will map.
+     * @param size Size of the memory block. Must be page-aligned.
+     * @param permissions Permission restrictions applied to the process which created the block.
+     * @param other_permissions Permission restrictions applied to other processes mapping the block.
+     * @param name Optional object name, used for debugging purposes.
+     */
+    static SharedPtr<SharedMemory> CreateForApplet(std::shared_ptr<std::vector<u8>> heap_block, u32 offset, u32 size,
+                                                   MemoryPermission permissions, MemoryPermission other_permissions, std::string name = "Unknown Applet");
+
     std::string GetTypeName() const override { return "SharedMemory"; }
     std::string GetName() const override { return name; }