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// 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 boot
import (
"testing"
rpb "gvisor.googlesource.com/gvisor/pkg/sentry/arch/registers_go_proto"
)
func TestOnceTracker(t *testing.T) {
o := onceTracker{}
if !o.shouldReport(nil) {
t.Error("first call to checkAndMark, got: false, want: true")
}
o.onReported(nil)
for i := 0; i < 2; i++ {
if o.shouldReport(nil) {
t.Error("after first call to checkAndMark, got: true, want: false")
}
}
}
func TestArgsTracker(t *testing.T) {
for _, tc := range []struct {
name string
idx []int
rdi1 uint64
rdi2 uint64
rsi1 uint64
rsi2 uint64
want bool
}{
{name: "same rdi", idx: []int{0}, rdi1: 123, rdi2: 123, want: false},
{name: "same rsi", idx: []int{1}, rsi1: 123, rsi2: 123, want: false},
{name: "diff rdi", idx: []int{0}, rdi1: 123, rdi2: 321, want: true},
{name: "diff rsi", idx: []int{1}, rsi1: 123, rsi2: 321, want: true},
{name: "cmd is uint32", idx: []int{0}, rsi1: 0xdead00000123, rsi2: 0xbeef00000123, want: false},
{name: "same 2 args", idx: []int{0, 1}, rsi1: 123, rdi1: 321, rsi2: 123, rdi2: 321, want: false},
{name: "diff 2 args", idx: []int{0, 1}, rsi1: 123, rdi1: 321, rsi2: 789, rdi2: 987, want: true},
} {
t.Run(tc.name, func(t *testing.T) {
c := newArgsTracker(tc.idx...)
regs := &rpb.AMD64Registers{Rdi: tc.rdi1, Rsi: tc.rsi1}
if !c.shouldReport(regs) {
t.Error("first call to shouldReport, got: false, want: true")
}
c.onReported(regs)
regs.Rdi, regs.Rsi = tc.rdi2, tc.rsi2
if got := c.shouldReport(regs); tc.want != got {
t.Errorf("second call to shouldReport, got: %t, want: %t", got, tc.want)
}
})
}
}
func TestArgsTrackerLimit(t *testing.T) {
c := newArgsTracker(0, 1)
for i := 0; i < reportLimit; i++ {
regs := &rpb.AMD64Registers{Rdi: 123, Rsi: uint64(i)}
if !c.shouldReport(regs) {
t.Error("shouldReport before limit was reached, got: false, want: true")
}
c.onReported(regs)
}
// Should hit the count limit now.
regs := &rpb.AMD64Registers{Rdi: 123, Rsi: 123456}
if c.shouldReport(regs) {
t.Error("shouldReport after limit was reached, got: true, want: false")
}
}
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