net/http: relax the matching of strace output in test

Modify the regex in TestLinuxSendfile to not match the parameters of
the syscall, just its name and the opening parenthesis. This is enough
to recognize that the syscall was invoked.

This fixes the TestLinuxSendfile test when running in Clear Linux,
where strace always execute with -yy implied, having output with extra
information in the parameters:

    [pid  5336] sendfile(6<TCP:[127.0.0.1:35007->127.0.0.1:55170]>, 8</home/c/src/go/src/net/http/testdata/index.html>, NULL, 22) = 22

Change-Id: If7639b785d5fdf65fae8e6149a97a57b06ea981c
Reviewed-on: https://go-review.googlesource.com/85657
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

diff --git a/src/net/http/fs_test.go b/src/net/http/fs_test.go
index e766dc69f470f06086daa3095351c748139e7acd..6ab122cf82e11c8ab457b05785a8f51c4c92b001 100644 (file)
--- a/src/net/http/fs_test.go
+++ b/src/net/http/fs_test.go
@@ -1140,7 +1140,7 @@ func TestLinuxSendfile(t *testing.T) {
        Post(fmt.Sprintf("http://%s/quit", ln.Addr()), "", nil)
        child.Wait()
 
-       rx := regexp.MustCompile(`sendfile(64)?\(\d+,\s*\d+,\s*NULL,\s*\d+`)
+       rx := regexp.MustCompile(`sendfile(64)?\(`)
        out := buf.String()
        if !rx.MatchString(out) {
                t.Errorf("no sendfile system call found in:\n%s", out)