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Fix potential violation of invariant

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The shared function for reading back context attributes,
_glfwRefreshContextAttribs, did not check whether the newly created
context had been successfully made current.  This violated the invariant
that the context TLS slot always points to a valid window and that its
context is current whenever _glfw.platform.getProcAddress is called.

Related to #2327

This was adapted to 3.3-stable from
fa0ea5c41f and
ddd92a4fa8.
This commit is contained in:
Camilla Löwy
2023-12-03 16:06:31 +01:00
parent 11f517e557
commit cb0dafa7c0
3 changed files with 4 additions and 0 deletions
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src/context.c
+2
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@@ -363,6 +363,8 @@ GLFWbool _glfwRefreshContextAttribs(_GLFWwindow* window,
previous = _glfwPlatformGetTls(&_glfw.contextSlot);
glfwMakeContextCurrent((GLFWwindow*) window);
if (_glfwPlatformGetTls(&_glfw.contextSlot) != window)
return GLFW_FALSE;
window->context.GetIntegerv = (PFNGLGETINTEGERVPROC)
window->context.getProcAddress("glGetIntegerv");