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runtime: add the checkPtraceScope to skip certain tests

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When the kernel parameter ptrace_scope is set to 2 or 3,
certain test cases in runtime-gdb_test.go will fail.
We should skip these tests.

Fixes #69932

Change-Id: I685d1217f1521d7f8801680cf6b71d8e7a265188
GitHub-Last-Rev: 063759e04c
GitHub-Pull-Request: golang/go#69933
Reviewed-on: https://go-review.googlesource.com/c/go/+/620857
Auto-Submit: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
This commit is contained in:
Shuo Wang 2024-10-23 01:52:14 +00:00 committed by Gopher Robot
parent 0b4168f6ab
commit 87a89fa451
1 changed files with 44 additions and 0 deletions
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44
src/runtime/runtime-gdb_test.go
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@ -112,6 +112,44 @@ func checkCleanBacktrace(t *testing.T, backtrace string) {
// TODO(mundaym): check for unknown frames (e.g. "??").
}
// checkPtraceScope checks the value of the kernel parameter ptrace_scope,
// skips the test when gdb cannot attach to the target process via ptrace.
// See issue 69932
//
// 0 - Default attach security permissions.
// 1 - Restricted attach. Only child processes plus normal permissions.
// 2 - Admin-only attach. Only executables with CAP_SYS_PTRACE.
// 3 - No attach. No process may call ptrace at all. Irrevocable.
func checkPtraceScope(t *testing.T) {
if runtime.GOOS != "linux" {
return
}
// If the Linux kernel does not have the YAMA module enabled,
// there will be no ptrace_scope file, which does not affect the tests.
path := "/proc/sys/kernel/yama/ptrace_scope"
if _, err := os.Stat(path); os.IsNotExist(err) {
return
}
data, err := os.ReadFile(path)
if err != nil {
t.Fatalf("failed to read file: %v", err)
}
value, err := strconv.Atoi(strings.TrimSpace(string(data)))
if err != nil {
t.Fatalf("failed converting value to int: %v", err)
}
switch value {
case 3:
t.Skip("skipping ptrace: Operation not permitted")
case 2:
if os.Geteuid() != 0 {
t.Skip("skipping ptrace: Operation not permitted with non-root user")
}
}
}
// NOTE: the maps below are allocated larger than abi.MapBucketCount
// to ensure that they are not "optimized out".
@ -194,6 +232,7 @@ func testGdbPython(t *testing.T, cgo bool) {
t.Parallel()
checkGdbVersion(t)
checkGdbPython(t)
checkPtraceScope(t)
dir := t.TempDir()
@ -417,6 +456,7 @@ func TestGdbBacktrace(t *testing.T) {
checkGdbEnvironment(t)
t.Parallel()
checkGdbVersion(t)
checkPtraceScope(t)
dir := t.TempDir()
@ -531,6 +571,7 @@ func TestGdbAutotmpTypes(t *testing.T) {
checkGdbEnvironment(t)
t.Parallel()
checkGdbVersion(t)
checkPtraceScope(t)
if runtime.GOOS == "aix" && testing.Short() {
t.Skip("TestGdbAutotmpTypes is too slow on aix/ppc64")
@ -616,6 +657,7 @@ func TestGdbConst(t *testing.T) {
checkGdbEnvironment(t)
t.Parallel()
checkGdbVersion(t)
checkPtraceScope(t)
dir := t.TempDir()
@ -680,6 +722,7 @@ func TestGdbPanic(t *testing.T) {
checkGdbEnvironment(t)
t.Parallel()
checkGdbVersion(t)
checkPtraceScope(t)
if runtime.GOOS == "windows" {
t.Skip("no signals on windows")
@ -759,6 +802,7 @@ func TestGdbInfCallstack(t *testing.T) {
t.Parallel()
checkGdbVersion(t)
checkPtraceScope(t)
dir := t.TempDir()