kc3-lang/SDL

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• Hash : 8f38ba4d
  Author :
  Date : 2021-07-29T18:02:47
  

  Fix casts that should be using uintptr_t
  
  This is needed to support CHERI, and thus Arm's experimental Morello
  prototype, where pointers are implemented using unforgeable capabilities
  that include bounds and permissions metadata to provide fine-grained
  spatial and referential memory safety, as well as revocation by sweeping
  memory to provide heap temporal memory safety.
  
  On most systems (anything with a flat memory hierarchy rather than using
  segment-based addressing), size_t and uintptr_t are the same type.
  However, on CHERI, size_t is just an integer offset, whereas uintptr_t
  is still a capability as described above. Casting a pointer to size_t
  will strip the metadata and validity tag, and casting from size_t to a
  pointer will result in a null-derived capability whose validity tag is
  not set, and thus cannot be dereferenced without faulting.
  
  The audio and cursor casts were harmless as they intend to stuff an
  integer into a pointer, but using uintptr_t is the idiomatic way to do
  that and silences our compiler warnings (which our build tool makes
  fatal by default as they often indicate real problems). The iconv and
  egl casts were true positives as SDL_iconv_t and iconv_t are pointer
  types, as is NativeDisplayType on most OSes, so this would have trapped
  at run time when using the round-tripped pointers. The gles2 casts were
  also harmless; the OpenGL API defines this argument to be a pointer type
  (and uses the argument name "pointer"), but it in fact represents an
  integer offset, so like audio and cursor the additional idiomatic cast
  is needed to silence the warning.
  

• Files

• .github/
• .gitignore
• Android.mk
• BUGS.txt
• CMakeLists.txt
• CREDITS.txt
• INSTALL.txt
• LICENSE.txt
• Makefile.in
• Makefile.minimal
• Makefile.os2
• Makefile.pandora
• Makefile.psp
• Makefile.wiz
• README-SDL.txt
• README.md
• SDL2.spec.in
• SDL2Config.cmake
• TODO.txt
• VisualC-WinRT/
• VisualC/
• WhatsNew.txt
• Xcode-iOS/
• Xcode/
• acinclude/
• android-project-ant/
• android-project/
• autogen.sh
• build-scripts/
• cmake/
• cmake_uninstall.cmake.in
• configure
• configure.ac
• debian/
• docs/
• include/
• sdl2-config-version.cmake.in
• sdl2-config.cmake.in
• sdl2-config.in
• sdl2.m4
• sdl2.pc.in
• src/
• test/
• visualtest/
• wayland-protocols/

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• Git HTTP	https://git.kmx.io/kc3-lang/SDL.git
  Git SSH	git@git.kmx.io:kc3-lang/SDL.git
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