long conversation that humanity has been having with itself for thousands of
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。吃瓜网对此有专业解读
What does a G actually carry? The struct has a lot of fields, but the ones I think are most useful for understanding how it works are: a small stack (starting at just 2KB), some saved registers (stack pointer, program counter, etc.) so the scheduler can pause it and resume it later, a status field that tracks what the goroutine is doing (running, waiting, ready to run), and a pointer to the M currently running it. The full struct in src/runtime/runtime2.go
EMACS_INT n = XFIXNUM (obj); // X: extract value
after expansion. I wrote a whole article about it.