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cmd/go: honor -timeout=0 to mean no timeout

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The test binaries accept -timeout=0 to mean no timeout,
but then the backup timer in cmd/go kills the test after 1 minute.
Make cmd/go understand this special case and change
behavior accordingly.

Fixes #14780.

Change-Id: I66bf517173a4ad21d53a5ee88d163f04b8929fb6
Reviewed-on: https://go-review.googlesource.com/81499
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Russ Cox 2017-12-01 11:57:57 -05:00
parent 7684fe0bf1
commit 496688b3cf
3 changed files with 10 additions and 4 deletions
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7
src/cmd/go/alldocs.go
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@ -1199,9 +1199,9 @@
// GO386
// For GOARCH=386, the floating point instruction set.
// Valid values are 387, sse2.
// GOMIPS
// For GOARCH=mips{,le}, whether to use floating point instructions.
// Valid values are hardfloat (default), softfloat.
// GOMIPS
// For GOARCH=mips{,le}, whether to use floating point instructions.
// Valid values are hardfloat (default), softfloat.
//
// Special-purpose environment variables:
//
@ -1575,6 +1575,7 @@
//
// -timeout d
// If a test binary runs longer than duration d, panic.
// If d is 0, the timeout is disabled.
// The default is 10 minutes (10m).
//
// -v

5
src/cmd/go/internal/test/test.go
View File

@ -272,6 +272,7 @@ const testFlag2 = `
-timeout d
If a test binary runs longer than duration d, panic.
If d is 0, the timeout is disabled.
The default is 10 minutes (10m).
-v
@ -549,6 +550,10 @@ func runTest(cmd *base.Command, args []string) {
// timer does not get a chance to fire.
if dt, err := time.ParseDuration(testTimeout); err == nil && dt > 0 {
testKillTimeout = dt + 1*time.Minute
} else if err == nil && dt == 0 {
// An explicit zero disables the test timeout.
// Let it have one century (almost) before we kill it.
testKillTimeout = 100 * 365 * 24 * time.Hour
}
// show passing test output (after buffering) with -v flag.

2
src/testing/testing.go
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@ -265,7 +265,7 @@ var (
mutexProfile = flag.String("test.mutexprofile", "", "write a mutex contention profile to the named file after execution")
mutexProfileFraction = flag.Int("test.mutexprofilefraction", 1, "if >= 0, calls runtime.SetMutexProfileFraction()")
traceFile = flag.String("test.trace", "", "write an execution trace to `file`")
timeout = flag.Duration("test.timeout", 0, "panic test binary after duration `d` (0 means unlimited)")
timeout = flag.Duration("test.timeout", 0, "panic test binary after duration `d` (default 0, timeout disabled)")
cpuListStr = flag.String("test.cpu", "", "comma-separated `list` of cpu counts to run each test with")
parallel = flag.Int("test.parallel", runtime.GOMAXPROCS(0), "run at most `n` tests in parallel")