Don't fail testProc for bad kptr_restrict or perf_event_paranoid

I.e. expect the failure to check whether we gracefully handle these
situations in the parser.

Change-Id: Ibd43c990d1d0b360c981ba337dbd3ac74a50c700
Reviewed-by: Milian Wolff <milian.wolff@kdab.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/auto/kallsyms/tst_kallsyms.cpp b/tests/auto/kallsyms/tst_kallsyms.cpp
index 6d9e31c..416390e 100644
--- a/tests/auto/kallsyms/tst_kallsyms.cpp
+++ b/tests/auto/kallsyms/tst_kallsyms.cpp
@@ -115,6 +115,25 @@ private slots:
         if (!QFile::exists(path))
             QSKIP("/proc/kallsysms not available");
 
+        auto checkSysCtl = [](const QString &knob, int expectedValue) -> bool {
+            QFile file(QLatin1String("/proc/sys/kernel/") + knob);
+            if (!file.open(QIODevice::ReadOnly)) {
+                qWarning() << "failed to open sysctl file for" << knob;
+                return false;
+            }
+            const auto contents = file.readAll().trimmed();
+            bool ok = false;
+            const auto value = contents.toInt(&ok);
+            if (!ok)
+                qWarning() << "Failed to parse sysctl file contents for" << knob << contents;
+            return ok && value == expectedValue;
+        };
+        if (!checkSysCtl(QStringLiteral("kptr_restrict"), 0)) {
+            QEXPECT_FAIL("", "sysctl kernel.kptr_restrict != 0, cannot parse /proc/kallsyms", Abort);
+        } else if (!checkSysCtl(QStringLiteral("perf_event_paranoid"), -1)) {
+            QEXPECT_FAIL("", "sysctl kernel.perf_event_paranoid != -1, cannot parse /proc/kallsyms", Abort);
+        }
+
         PerfKallsyms kallsyms;
         QVERIFY(kallsyms.parseMapping(path));
         QVERIFY(kallsyms.errorString().isEmpty());