CrashDoctor is a program developed to recover crashing programs. It works as a windows JIT debugger and activates when a program crashes. Once user selects to recover the crashing program, it attaches to the program and tries to recover them from the crash by either skipping the faulting instruction or skipping the faulting function. This can be useful in complex programs where a non-critical part of the software crashes. In such cases, it may be better to just fail the faulting function than let the whole application crash, which may result in information loss.
CrashDoctor has another useful feature. Once a program crashes, CrashDoctor monitors the execution of the program. If the program tries to open an existing file for writing CrashDoctor intercepts this and copies the original file to a backup location. This prevents any further damage done by the misbehaving program. The current version of CrashDoctor however doesn't prevent this if program already has these files open.
CrashDoctor also works like a debugger chooser. After installing CrashDoctor if a program crashes, the CrashDoctor recovery screen shows up. This screen lists debuggers available on the system and you can select a debugger to debug the crashing program instead of recovering it from crash. Note that once you start debugging the program, you won't be able to recover it.
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