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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 commit is contained in:
Camilla Löwy 2023-12-03 16:06:31 +01:00
parent 8c5471d6cd
commit fa0ea5c41f
1 changed files with 2 additions and 0 deletions
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2
src/context.c
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@ -363,6 +363,8 @@ GLFWbool _glfwRefreshContextAttribs(_GLFWwindow* window,
previous = _glfwPlatformGetTls(&_glfw.contextSlot); previous = _glfwPlatformGetTls(&_glfw.contextSlot);
glfwMakeContextCurrent((GLFWwindow*) window); glfwMakeContextCurrent((GLFWwindow*) window);
if (_glfwPlatformGetTls(&_glfw.contextSlot) != window)
return GLFW_FALSE;
window->context.GetIntegerv = (PFNGLGETINTEGERVPROC) window->context.GetIntegerv = (PFNGLGETINTEGERVPROC)
window->context.getProcAddress("glGetIntegerv"); window->context.getProcAddress("glGetIntegerv");