Memory callback

Memory callback

[Super Man]

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Sorry to bother you, I would like to ask a question.I want to use qemu to
monitor the information of the target thread reading and writing memory. I
see that qemu supports the tcg plugin, but I just find the following code
in plugin-gen.c .Do I just need to add a record function in it? How do I
read the current register values such as rip, rsp, how do I know the
current target address and data that the CPU read or written?Is there any
reference example?

/*
> * These helpers are stubs that get dynamically switched out for calls
> * direct to the plugin if they are subscribed to.
> */
> void HELPER(plugin_vcpu_udata_cb)(uint32_t cpu_index, void *udata)
> { }
> void HELPER(plugin_vcpu_mem_cb)(unsigned int vcpu_index,
> qemu_plugin_meminfo_t info, uint64_t vaddr,
> void *userdata)
> { }

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