How do I use the Crashpad sanitization options?

[Matthew Spelman]

I've been looking at the code under third_party/crashpad/crashpad/snapshot/sanitized and it looks interesting, but I haven't been able to find any examples or detailed documentation about how to integrate its functions into existing Crashpad usage. I am currently using CrashpadClient::StartHandler(...) to generate a crash report, but it's not clear to me how I can configure the generation of the reports with sanitization options. Thanks!

[Joshua Peraza]

Crashpad's sanitization logic is only fully hooked up on Android, but shouldn't be too much work to hook it up for other platforms.

At a high level, the client process (your application) creates a SanitzationInformation struct describing the sanitzation configuration and communicates the address of the struct to the crashpad handler process. When a crash happens, the handler reads the struct from your client process and sanitizes the dump accordingly.

On Android, the struct address is communicated either in a message the client sends to the handler when it requests a dump or on the command line to crashpad_handler, but this is only because of particular requirements for Android and WebView.

To plumb this out for other platforms, I'd suggest adding a CrashpadInfo::set_sanitzation_info_address() and make sure to update the CrashpadInfoReader. Then, for Linux, you should be able to get the address from a CrashpadInfoClientOptions here and use it to configure sanitization just below that. Other platforms have similar code under hander/<platform>/crash_report_exception_handler.cc but need a little more of the logic that's already there for Linux.

On Mon, Feb 7, 2022 at 11:10 AM Matthew Spelman <mjs...@gmail.com> wrote:

I've been looking at the code under third_party/crashpad/crashpad/snapshot/sanitized and it looks interesting, but I haven't been able to find any examples or detailed documentation about how to integrate its functions into existing Crashpad usage. I am currently using CrashpadClient::StartHandler(...) to generate a crash report, but it's not clear to me how I can configure the generation of the reports with sanitization options. Thanks!

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