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mmap all the font files!

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Font now uses the same in-memory format as the font files we have on disk.
This allows us to simply mmap() the font files and not use any additional
memory for them. Very cool! :^)

Hacking on this exposed a bug in file-backed VMObjects where the first client
to instantiate a VMObject for a specific inode also got to decide its size.
Since file-backed VMObjects always have the same size as the underlying file,
this made no sense, so I removed the ability to even set a size in that case.
This commit is contained in:
Andreas Kling 2019-02-05 06:43:33 +01:00
parent 612c02307e
commit a258d6507a
11 changed files with 134 additions and 110 deletions
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2
Kernel/Process.cpp
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@ -325,7 +325,7 @@ int Process::do_exec(const String& path, Vector<String>&& arguments, Vector<Stri
#endif
ProcessPagingScope paging_scope(*this);
auto vmo = VMObject::create_file_backed(descriptor->inode(), descriptor->metadata().size);
auto vmo = VMObject::create_file_backed(descriptor->inode());
vmo->set_name(descriptor->absolute_path());
RetainPtr<Region> region = allocate_region_with_vmo(LinearAddress(), descriptor->metadata().size, vmo.copy_ref(), 0, "helper", true, false);