sandbox/linux: move ErrorCode into bpf_dsl

sandbox/linux/bpf_dsl/errorcode_unittest.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "sandbox/linux/bpf_dsl/errorcode.h"
+
+#include <errno.h>
+
+#include "base/macros.h"
+#include "sandbox/linux/bpf_dsl/bpf_dsl.h"
+#include "sandbox/linux/bpf_dsl/policy.h"
+#include "sandbox/linux/bpf_dsl/policy_compiler.h"
+#include "sandbox/linux/bpf_dsl/test_trap_registry.h"
+#include "sandbox/linux/system_headers/linux_seccomp.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace sandbox {
+namespace bpf_dsl {
+namespace {
+
+class DummyPolicy : public Policy {
+ public:
+  DummyPolicy() {}
+  ~DummyPolicy() override {}
+
+  ResultExpr EvaluateSyscall(int sysno) const override { return Allow(); }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DummyPolicy);
+};
+
+class ErrorCodeTest : public ::testing::Test {
+ protected:
+  ErrorCodeTest()
+      : policy_(), trap_registry_(), compiler_(&policy_, &trap_registry_) {}
+  ~ErrorCodeTest() override {}
+
+  DummyPolicy policy_;
+  TestTrapRegistry trap_registry_;
+  PolicyCompiler compiler_;
+
+  DISALLOW_COPY_AND_ASSIGN(ErrorCodeTest);
+};
+
+TEST_F(ErrorCodeTest, ErrnoConstructor) {
+  ErrorCode e0;
+  EXPECT_EQ(SECCOMP_RET_INVALID, e0.err());
+
+  ErrorCode e1(ErrorCode::ERR_ALLOWED);
+  EXPECT_EQ(SECCOMP_RET_ALLOW, e1.err());
+
+  ErrorCode e2(EPERM);
+  EXPECT_EQ(SECCOMP_RET_ERRNO + EPERM, e2.err());
+
+  ErrorCode e3 = compiler_.Trap(NULL, NULL, true /* safe */);
+  EXPECT_EQ(SECCOMP_RET_TRAP, (e3.err() & SECCOMP_RET_ACTION));
+
+  uint16_t data = 0xdead;
+  ErrorCode e4(ErrorCode::ERR_TRACE + data);
+  EXPECT_EQ(SECCOMP_RET_TRACE + data, e4.err());
+}
+
+TEST_F(ErrorCodeTest, InvalidSeccompRetTrace) {
+  // Should die if the trace data does not fit in 16 bits.
+  ASSERT_DEATH(ErrorCode e(ErrorCode::ERR_TRACE + (1 << 16)),
+               "Invalid use of ErrorCode object");
+}
+
+TEST_F(ErrorCodeTest, Trap) {
+  ErrorCode e0 = compiler_.Trap(NULL, "a", true /* safe */);
+  ErrorCode e1 = compiler_.Trap(NULL, "b", true /* safe */);
+  EXPECT_EQ((e0.err() & SECCOMP_RET_DATA) + 1, e1.err() & SECCOMP_RET_DATA);
+
+  ErrorCode e2 = compiler_.Trap(NULL, "a", true /* safe */);
+  EXPECT_EQ(e0.err() & SECCOMP_RET_DATA, e2.err() & SECCOMP_RET_DATA);
+}
+
+TEST_F(ErrorCodeTest, Equals) {
+  ErrorCode e1(ErrorCode::ERR_ALLOWED);
+  ErrorCode e2(ErrorCode::ERR_ALLOWED);
+  EXPECT_TRUE(e1.Equals(e1));
+  EXPECT_TRUE(e1.Equals(e2));
+  EXPECT_TRUE(e2.Equals(e1));
+
+  ErrorCode e3(EPERM);
+  EXPECT_FALSE(e1.Equals(e3));
+
+  ErrorCode e4 = compiler_.Trap(NULL, "a", true /* safe */);
+  ErrorCode e5 = compiler_.Trap(NULL, "b", true /* safe */);
+  ErrorCode e6 = compiler_.Trap(NULL, "a", true /* safe */);
+  EXPECT_FALSE(e1.Equals(e4));
+  EXPECT_FALSE(e3.Equals(e4));
+  EXPECT_FALSE(e5.Equals(e4));
+  EXPECT_TRUE(e6.Equals(e4));
+}
+
+TEST_F(ErrorCodeTest, LessThan) {
+  ErrorCode e1(ErrorCode::ERR_ALLOWED);
+  ErrorCode e2(ErrorCode::ERR_ALLOWED);
+  EXPECT_FALSE(e1.LessThan(e1));
+  EXPECT_FALSE(e1.LessThan(e2));
+  EXPECT_FALSE(e2.LessThan(e1));
+
+  ErrorCode e3(EPERM);
+  EXPECT_FALSE(e1.LessThan(e3));
+  EXPECT_TRUE(e3.LessThan(e1));
+
+  ErrorCode e4 = compiler_.Trap(NULL, "a", true /* safe */);
+  ErrorCode e5 = compiler_.Trap(NULL, "b", true /* safe */);
+  ErrorCode e6 = compiler_.Trap(NULL, "a", true /* safe */);
+  EXPECT_TRUE(e1.LessThan(e4));
+  EXPECT_TRUE(e3.LessThan(e4));
+  EXPECT_TRUE(e4.LessThan(e5));
+  EXPECT_FALSE(e4.LessThan(e6));
+  EXPECT_FALSE(e6.LessThan(e4));
+}
+
+}  // namespace
+}  // namespace bpf_dsl
+}  // namespace sandbox