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https://github.com/RGBCube/serenity
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Make GraphicsBitmaps be Region-backed when running in the kernel.
This is a lot better than having them in kmalloc memory. I'm gonna need a way to keep track of which process owns which bitmap eventually, maybe through some sort of resource keying system. We'll see.
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7 changed files with 30 additions and 3 deletions
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@ -11,6 +11,8 @@
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#include <AK/AKString.h>
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#include <VirtualFileSystem/VirtualFileSystem.h>
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#define PAGE_ROUND_UP(x) ((((dword)(x)) + PAGE_SIZE-1) & (~(PAGE_SIZE-1)))
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class Process;
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extern Process* current;
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@ -68,6 +68,7 @@ Vector<Process*> Process::allProcesses()
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Region* Process::allocate_region(LinearAddress laddr, size_t size, String&& name, bool is_readable, bool is_writable, bool commit)
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{
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size = PAGE_ROUND_UP(size);
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// FIXME: This needs sanity checks. What if this overlaps existing regions?
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if (laddr.is_null()) {
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laddr = m_nextRegion;
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@ -84,7 +85,7 @@ Region* Process::allocate_region(LinearAddress laddr, size_t size, String&& name
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Region* Process::allocate_file_backed_region(LinearAddress laddr, size_t size, RetainPtr<Vnode>&& vnode, String&& name, bool is_readable, bool is_writable)
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{
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ASSERT(!vnode->isCharacterDevice());
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size = PAGE_ROUND_UP(size);
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// FIXME: This needs sanity checks. What if this overlaps existing regions?
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if (laddr.is_null()) {
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laddr = m_nextRegion;
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@ -99,6 +100,7 @@ Region* Process::allocate_file_backed_region(LinearAddress laddr, size_t size, R
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Region* Process::allocate_region_with_vmo(LinearAddress laddr, size_t size, RetainPtr<VMObject>&& vmo, size_t offset_in_vmo, String&& name, bool is_readable, bool is_writable)
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{
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ASSERT(vmo);
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size = PAGE_ROUND_UP(size);
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// FIXME: This needs sanity checks. What if this overlaps existing regions?
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if (laddr.is_null()) {
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laddr = m_nextRegion;
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@ -43,6 +43,7 @@ struct DisplayInfo {
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class Process : public InlineLinkedListNode<Process> {
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friend class InlineLinkedListNode<Process>;
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friend class WindowManager; // FIXME: Make a better API for allocate_region().
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friend class GraphicsBitmap; // FIXME: Make a better API for allocate_region().
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public:
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static Process* create_kernel_process(String&& name, void (*entry)());
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static Process* create_user_process(const String& path, uid_t, gid_t, pid_t ppid, int& error, Vector<String>&& arguments = Vector<String>(), Vector<String>&& environment = Vector<String>(), TTY* = nullptr);
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@ -231,8 +231,10 @@ void exception_14_handler(RegisterDumpWithExceptionCode& regs)
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);
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#endif
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if (current->isRing0())
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if (current->isRing0()) {
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current->dumpRegions();
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HANG;
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}
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auto response = MM.handle_page_fault(PageFault(regs.exception_code, LinearAddress(faultAddress)));
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