win_injector: seperate readfile and writefile to different files #1319
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Can one of the admins verify this patch? |
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@drakvuf-jenkins This is OK to test |
manorit2001
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Hi Tamas, Do I need to shorten the switch cases reported by codeQL or would it be fine? |
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CodeQL looks fine, I think it's good to merge |
tklengyel
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May 31, 2022
* libinjector, win: Update prototypes of cleanup() helpers Pass drakvuf as explicit argument to simplify a future commit. This also improves consistency with the corresponding code for Linux. * libinjector, win: Fix intermittent timeouts After restoring the saved CPU registers, each injection method waits for the next trap before exiting the injector loop. This means that the target thread, continuing to execute the original program, needs to trigger the same trap before the injector can finish. And that leads to unpredictable waits. For example, waits of a few minutes were observed when testing injector against explorer.exe under Windows 7 Enterprise (x64). Further, injector could wait forever in case the target thread never revisits the trap. The waits were introduced when refactoring injection methods in commit 3fdb370 ("win_injector: seperate readfile and writefile to different files (#1319)"). Fix this issue by arranging for the injector loop to exit immediately after restoring the saved CPU registers. * libinjector, win: Update signal number passed to drakvuf_interrupt() Use SIGINT instead of SIGDRAKVUFERROR when the injector succeeded.
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Related #936
This is tested on Win7 x64 only