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Bug 1620998 - Out-of-process crash generation for child processes r=afranchuk,geckoview-reviewers,glandium,browser-installer-reviewers,nalexander,owlish

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This implements the crash helper service used to move child process crash
report generation out of the main process and into its own process. This is
implemented as a separate executable that is launched on startup by the main
process on the desktop platforms and as a service hosted by a separate process
on Android.

The crash helper process is started when the first exception handler is set
on desktop platforms and before loading libxul on Android. In both cases
starting this process happens asynchronously so that neither the main process
nor child processes have to wait for it to come up. If a crash happens before
the crash helper has started, the crashed process will wait for it to fully
come up and then proceed with regular crash generation.

IPC with the crash helper is implemented using Unix sockets on Linux and macOS
with the former using sequential packets and the latter using stream sockets.
On Windows we use named pipes. In all cases the choice of IPC was dictated both
by the requirement to eventually talk directly to child processes from within
the sandbox, and to external processes in case of Windows as the Windows
Error Reporting exception handler must be able to reach out to the helper from
within a restricted context. These particular requirements are not used yet but
will be as we move more logic out of the main process logic.

Differential Revision: https://phabricator.services.mozilla.com/D231083
This commit is contained in:
Gabriele Svelto
2025-04-01 15:13:42 +00:00
parent be9d627d92
commit 6259c76b43
74 changed files with 3133 additions and 771 deletions
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3
Cargo.toml
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@@ -17,9 +17,10 @@ members = [
"testing/geckodriver",
"toolkit/components/uniffi-bindgen-gecko-js",
"toolkit/crashreporter/client/app",
"toolkit/crashreporter/crash_helper_server",
"toolkit/crashreporter/crash_helper_client",
"toolkit/crashreporter/minidump-analyzer/android/export",
"toolkit/crashreporter/mozwer-rust",
"toolkit/crashreporter/rust_minidump_writer_linux",
"toolkit/library/gtest/rust",
"toolkit/library/rust/",
]