Hi all I am new to Valgrind and have some questions about the principles of Valgrind.
According to the manual, https://valgrind.org/docs/manual/manual-core.html#manual-core.whatdoes "Your program is then run on a synthetic CPU provided by the Valgrind core." "Valgrind simulates every single instruction your program executes" I am curious that as a binary instrumentation framework, why Valgrind needs to simulate the CPU and instruction execution. It seems that the host and guest architecture must be the same due to the multiple syscalls. If so, why not use the host CPU to run the translated binary directly instead of simulation? Simulated instruction execution might be different from the execution on physical devices. The other question is that what part is simulated for a CPU except for the instruction execution. Are the memory model, cache, and registers all simulated/emulated. Any suggestions and comments are welcome. Many Thanks Regards Muhui
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