[SOLVED] When setting a hardware breakpoint on access, do we need to do it per CPU core?

kd2024 · Apr 18, 2024

I'm testing this on an Arch64 CPU with multiple cores. Say, when in WinDbg I do:

Code:

ba r 1 <addr>

It sets a hardware breakpoint on read/write access to one byte at the <addr>. But does it mean that I'm limiting it only to the current CPU core? If so, how do I set this bp for all the cores?

x BlueRobot · Apr 18, 2024

Please start reading the documentation:

On a multiprocessor computer, each processor breakpoint applies to all processors. For example, if the current processor is 3 and you use the command ba e1 MyAddress to put a breakpoint at MyAddress, any processor -- not only processor 3 -- that executes at that address triggers the breakpoint. This holds for software breakpoints as well.

Source: Processor Breakpoints (ba Breakpoints) - Windows drivers

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[SOLVED] When setting a hardware breakpoint on access, do we need to do it per CPU core?

kd2024

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x BlueRobot

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