runtime/pprof: ignore CPU profile test failures in QEMU

Fixes #9605

Change-Id: Iafafa4c1362bbd1940f8e4fb979f72feae3ec3ad
Reviewed-on: https://go-review.googlesource.com/3000
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

diff --git a/src/runtime/pprof/pprof_test.go b/src/runtime/pprof/pprof_test.go
index 101c0598937e3468b7a82a07f78c54a2e562ebe4..49dd78446f68947b65176f672f06538a3e2ec008 100644 (file)
--- a/src/runtime/pprof/pprof_test.go
+++ b/src/runtime/pprof/pprof_test.go
@@ -10,6 +10,7 @@ import (
        "bytes"
        "fmt"
        "math/big"
+       "os"
        "os/exec"
        "regexp"
        "runtime"
@@ -186,6 +187,14 @@ func testCPUProfile(t *testing.T, need []string, f func()) {
                        t.Skipf("ignoring failure on %s; see golang.org/issue/6047", runtime.GOOS)
                        return
                }
+               // Ignore the failure if the tests are running in a QEMU-based emulator,
+               // QEMU is not perfect at emulating everything.
+               // IN_QEMU environmental variable is set by some of the Go builders.
+               // IN_QEMU=1 indicates that the tests are running in QEMU. See issue 9605.
+               if os.Getenv("IN_QEMU") == "1" {
+                       t.Skip("ignore the failure in QEMU; see golang.org/issue/9605")
+                       return
+               }
                t.FailNow()
        }
 }