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bzltestutil: restore timeout signal handler #3929

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merged 2 commits into from
Apr 30, 2024
Merged

bzltestutil: restore timeout signal handler #3929

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2502b01
bzltestutil: restore timeout signal handler
sluongng Apr 29, 2024
8db148b
Update go/tools/builders/generate_test_main.go
fmeum Apr 30, 2024
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18 changes: 16 additions & 2 deletions go/tools/builders/generate_test_main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -245,9 +245,23 @@ func main() {
// we set -test.timeout according to the TEST_TIMEOUT, we need to ignore the signal so the test has
// time to properly produce the output (e.g. stack trace). It will be killed by Bazel after the grace
// period (15s) expires.
//
// If TEST_TIMEOUT is not set (e.g., when the test binary is run by Delve for debugging), we don't
// ignore SIGTERM so it can be properly terminated.
signal.Ignore(syscall.SIGTERM)
// ignore SIGTERM so it can be properly terminated. (1)
// We do not panic (like native go test does) because users may legitimately want to use SIGTERM
// in tests.
//
// signal.Notify is used to ensure that there is a no-op signal handler registered.
// Avoid using signal.Ignore here: despite the name, it's only used to unregister handlers that
// were previously registered by signal.Notify. See (2) for more information.
//
// (1): https://github.com/golang/go/blob/e816eb50140841c524fd07ecb4eaa078954eb47c/src/testing/testing.go#L2351
// (2): https://github.com/bazelbuild/rules_go/pull/3929
c := make(chan os.Signal, 1)
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signal.Notify(c, syscall.SIGTERM)
go func() {
<-c
}()
}

{{if not .TestMain}}
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