Ensure all ptrace() and /proc/<pid> IO is through an interface #167
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When Android Isolated Process is enabled, every process exists in its own ephemeral UID and SELinux context. That will essentially block `ptrace()` and I/O to `/proc/<pid>`, which means minidump-writer currently can't be used to dump Isolated Processes. This change refactors existing code to do all forbidden operations through a trait, `ProcessInspector`, that currently only has one implementation - `DirectInspector` - which calls the APIs directly (like the current implementation does). In the next change, we will add another implementation of `ProcessInspector` - `remote::InspectorInvoker` and its other half `remote::InspectorExecutor` - That will allow minidump-writer to send `ptrace()` and `/proc/<pid>` I/O requests to a remote process that does have the required permissions.
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When Android Isolated Process is enabled, every process exists in its own ephemeral UID and SELinux context. That will essentially block
ptrace()and I/O to/proc/<pid>, which means minidump-writer currently can't be used to dump Isolated Processes.This change refactors existing code to do all forbidden operations through a trait,
ProcessInspector, that currently only has one implementation -DirectInspector- which calls the APIs directly (like the current implementation does).In the next change, we will add another implementation of
ProcessInspector-remote::InspectorInvokerand its other halfremote::InspectorExecutor- That will allow minidump-writer to sendptrace()and/proc/<pid>I/O requests to a remote process that does have the required permissions.Fixes #166