diff options
Diffstat (limited to 'pkg/cpuid/cpuid_parse_test.go')
-rw-r--r-- | pkg/cpuid/cpuid_parse_test.go | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/pkg/cpuid/cpuid_parse_test.go b/pkg/cpuid/cpuid_parse_test.go deleted file mode 100644 index dd9969db4..000000000 --- a/pkg/cpuid/cpuid_parse_test.go +++ /dev/null @@ -1,142 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package cpuid - -import ( - "fmt" - "io/ioutil" - "regexp" - "strconv" - "strings" - "syscall" - "testing" -) - -func kernelVersion() (int, int, error) { - var u syscall.Utsname - if err := syscall.Uname(&u); err != nil { - return 0, 0, err - } - - var r string - for _, b := range u.Release { - if b == 0 { - break - } - r += string(b) - } - - s := strings.Split(r, ".") - if len(s) < 2 { - return 0, 0, fmt.Errorf("kernel release missing major and minor component: %s", r) - } - - major, err := strconv.Atoi(s[0]) - if err != nil { - return 0, 0, fmt.Errorf("error parsing major version %q in %q: %v", s[0], r, err) - } - - minor, err := strconv.Atoi(s[1]) - if err != nil { - return 0, 0, fmt.Errorf("error parsing minor version %q in %q: %v", s[1], r, err) - } - - return major, minor, nil -} - -// TestHostFeatureFlags tests that all features detected by HostFeatureSet are -// on the host. -// -// It does *not* verify that all features reported by the host are detected by -// HostFeatureSet. -// -// i.e., test that HostFeatureSet is a subset of the host features. -func TestHostFeatureFlags(t *testing.T) { - cpuinfoBytes, _ := ioutil.ReadFile("/proc/cpuinfo") - cpuinfo := string(cpuinfoBytes) - t.Logf("Host cpu info:\n%s", cpuinfo) - - major, minor, err := kernelVersion() - if err != nil { - t.Fatalf("Unable to parse kernel version: %v", err) - } - - re := regexp.MustCompile(`(?m)^flags\s+: (.*)$`) - m := re.FindStringSubmatch(cpuinfo) - if len(m) != 2 { - t.Fatalf("Unable to extract flags from %q", cpuinfo) - } - - cpuinfoFlags := make(map[string]struct{}) - for _, f := range strings.Split(m[1], " ") { - cpuinfoFlags[f] = struct{}{} - } - - fs := HostFeatureSet() - - // All features have a string and appear in host cpuinfo. - for f := range fs.Set { - name := f.flagString(false) - if name == "" { - t.Errorf("Non-parsable feature: %v", f) - } - - // Special cases not consistently visible. We don't mind if - // they are exposed in earlier versions. - switch { - // Block 0. - case f == X86FeatureSDBG && (major < 4 || major == 4 && minor < 3): - // SDBG only exposed in - // b1c599b8ff80ea79b9f8277a3f9f36a7b0cfedce (4.3). - continue - // Block 2. - case f == X86FeatureRDT && (major < 4 || major == 4 && minor < 10): - // RDT only exposed in - // 4ab1586488cb56ed8728e54c4157cc38646874d9 (4.10). - continue - // Block 3. - case f == X86FeatureAVX512VBMI && (major < 4 || major == 4 && minor < 10): - // AVX512VBMI only exposed in - // a8d9df5a509a232a959e4ef2e281f7ecd77810d6 (4.10). - continue - case f == X86FeatureUMIP && (major < 4 || major == 4 && minor < 15): - // UMIP only exposed in - // 3522c2a6a4f341058b8291326a945e2a2d2aaf55 (4.15). - continue - case f == X86FeaturePKU && (major < 4 || major == 4 && minor < 9): - // PKU only exposed in - // dfb4a70f20c5b3880da56ee4c9484bdb4e8f1e65 (4.9). - continue - // Block 4. - case f == X86FeatureXSAVES && (major < 4 || major == 4 && minor < 8): - // XSAVES only exposed in - // b8be15d588060a03569ac85dc4a0247460988f5b (4.8). - continue - // Block 5. - case f == X86FeaturePERFCTR_LLC && (major < 4 || major == 4 && minor < 14): - // PERFCTR_LLC renamed in - // 910448bbed066ab1082b510eef1ae61bb792d854 (4.14). - continue - } - - hidden := f.flagString(true) == "" - _, ok := cpuinfoFlags[name] - if hidden && ok { - t.Errorf("Unexpectedly hidden flag: %v", f) - } else if !hidden && !ok { - t.Errorf("Non-native flag: %v", f) - } - } -} |