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proc_test: deflake TestSystemstackOnRuntimeNewstack (#1078)

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Depending on how the runtime schedules our goroutines we can get
unlucky and have the first call to runtime.newstack we intercept be for
a different goroutine (usually the garbage collector).
Only check stacktraces that happen on the same goroutine that executed
main.main.
This commit is contained in:
Alessandro Arzilli 2018-01-19 15:42:23 +01:00 committed by GitHub
parent 3f3de1a9b5
commit bc77ff4534
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1 changed files with 13 additions and 3 deletions
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16
pkg/proc/proc_test.go
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@ -3365,11 +3365,21 @@ func TestSystemstackOnRuntimeNewstack(t *testing.T) {
_, err := setFunctionBreakpoint(p, "main.main")
assertNoError(err, t, "setFunctionBreakpoint(main.main)")
assertNoError(proc.Continue(p), t, "first continue")
_, err = setFunctionBreakpoint(p, "runtime.newstack")
assertNoError(err, t, "setFunctionBreakpoint(runtime.newstack)")
assertNoError(proc.Continue(p), t, "second continue")
g, err := proc.GetG(p.CurrentThread())
assertNoError(err, t, "GetG")
mainGoroutineID := g.ID
_, err = setFunctionBreakpoint(p, "runtime.newstack")
assertNoError(err, t, "setFunctionBreakpoint(runtime.newstack)")
for {
assertNoError(proc.Continue(p), t, "second continue")
g, err = proc.GetG(p.CurrentThread())
assertNoError(err, t, "GetG")
if g.ID == mainGoroutineID {
break
}
}
frames, err := g.Stacktrace(100)
assertNoError(err, t, "stacktrace")
logStacktrace(t, frames)