func TestSearchInOtherProcess(t *testing.T) {
cmd, err := test.LaunchTestCaseAndWaitForInitialization()
if err != nil {
t.Fatal(err)
}
defer cmd.Process.Kill()
pid := uint(cmd.Process.Pid)
proc, err, softerrors := process.OpenFromPid(pid)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
defer proc.Close()
for i, buf := range buffersToFind {
found, _, err, softerrors := FindBytesSequence(proc, 0, buf)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
} else if !found {
t.Fatalf("memoryGrep failed for case %d, the following buffer should be found: %+v", i, buf)
}
}
// This must not be present
found, _, err, softerrors := FindBytesSequence(proc, 0, notPresent)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
} else if found {
t.Fatalf("memoryGrep failed, it found a sequense of bytes that it shouldn't")
}
}
func TestWalkMemoryDoesntOverlapTheBuffer(t *testing.T) {
cmd, err := test.LaunchTestCaseAndWaitForInitialization()
if err != nil {
t.Fatal(err)
}
defer cmd.Process.Kill()
pid := uint(cmd.Process.Pid)
proc, err, softerrors := process.OpenFromPid(pid)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
pageSize := uint(os.Getpagesize())
bufferSizes := []uint{1024, pageSize, pageSize + 100, pageSize * 2, pageSize*2 + 123}
for _, size := range bufferSizes {
lastRegion := MemoryRegion{}
err, softerrors = WalkMemory(proc, 0, size, func(address uintptr, buffer []byte) (keepSearching bool) {
currentRegion := MemoryRegion{Address: address, Size: uint(len(buffer))}
if memoryRegionsOverlap(lastRegion, currentRegion) {
t.Errorf("Regions overlap while reading %d at a time: %v %v", size, lastRegion, currentRegion)
return false
}
lastRegion = currentRegion
return true
})
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
}
}
func TestRegexpSearchInOtherProcess(t *testing.T) {
cmd, err := test.LaunchTestCaseAndWaitForInitialization()
if err != nil {
t.Fatal(err)
}
defer cmd.Process.Kill()
pid := uint(cmd.Process.Pid)
proc, err, softerrors := process.OpenFromPid(pid)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
defer proc.Close()
for i, str := range regexpToMatch {
r, err := regexp.Compile(str)
if err != nil {
t.Fatal(err)
}
found, _, err, softerrors := FindRegexpMatch(proc, 0, r)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
} else if !found {
t.Fatalf("memoryGrep failed for case %d, the following regexp should be found: %s", i, str)
}
}
// These must not match
for i, str := range regexpToNotMatch {
r, err := regexp.Compile(str)
if err != nil {
t.Fatal(err)
}
found, _, err, softerrors := FindRegexpMatch(proc, 0, r)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
} else if found {
t.Fatalf("memoryGrep failed for case %d, the following regexp shouldnt be found: %s", i, str)
}
}
}
func TestCopyMemory(t *testing.T) {
cmd, err := test.LaunchTestCaseAndWaitForInitialization()
if err != nil {
t.Fatal(err)
}
defer cmd.Process.Kill()
pid := uint(cmd.Process.Pid)
proc, err, softerrors := process.OpenFromPid(pid)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
var region MemoryRegion
region, err, softerrors = NextReadableMemoryRegion(proc, 0)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
if region == NoRegionAvailable {
t.Error("No starting region returned")
}
min_region_size := uint(os.Getpagesize() + 100) // one page plus something
for region.Size < min_region_size {
if region == NoRegionAvailable {
t.Fatal("We couldn't find a region of %d bytes", min_region_size)
}
region, err, softerrors = NextReadableMemoryRegion(proc, region.Address+uintptr(region.Size))
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
}
buffers := [][]byte{
make([]byte, 2),
make([]byte, os.Getpagesize()),
make([]byte, min_region_size),
}
for _, buffer := range buffers {
// Valid read
err, softerrors = CopyMemory(proc, region.Address, buffer)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Error(fmt.Sprintf("Couldn't read %d bytes from region", len(buffer)))
}
// Crossing boundaries
err, softerrors = CopyMemory(proc, region.Address+uintptr(region.Size)-uintptr(len(buffer)/2), buffer)
test.PrintSoftErrors(softerrors)
if err == nil {
t.Error(fmt.Sprintf("Read %d bytes inbetween regions", len(buffer)))
}
// Entirely outside region
err, softerrors = CopyMemory(proc, region.Address+uintptr(region.Size), buffer)
test.PrintSoftErrors(softerrors)
if err == nil {
t.Error(fmt.Sprintf("Read %d bytes after the region", len(buffer)))
}
}
}
func TestSlidingWalkMemory(t *testing.T) {
cmd, err := test.LaunchTestCaseAndWaitForInitialization()
if err != nil {
t.Fatal(err)
}
defer cmd.Process.Kill()
pid := uint(cmd.Process.Pid)
proc, err, softerrors := process.OpenFromPid(pid)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
pageSize := uint(os.Getpagesize())
bufferSizes := []uint{1024, pageSize, pageSize + 100, pageSize * 2, pageSize*2 + 124}
for _, size := range bufferSizes {
lastRegion := MemoryRegion{}
err, softerrors = SlidingWalkMemory(proc, 0, size, func(address uintptr, buffer []byte) (keepSearching bool) {
currentRegion := MemoryRegion{Address: address, Size: uint(len(buffer))}
if lastRegion.Address == 0 {
lastRegion = currentRegion
return true
}
lastRegionLimit := lastRegion.Address + uintptr(lastRegion.Size)
overlappedBytes := uintptr(0)
regionIsContigous := false
if lastRegionLimit > currentRegion.Address {
overlappedBytes = lastRegionLimit - currentRegion.Address
} else if lastRegionLimit == currentRegion.Address {
regionIsContigous = true
}
if regionIsContigous {
if regionIsContigous {
t.Error(fmt.Sprintf("Contigous buffer while we are expecting overlapped ones."+
"buffer size %d - lastRegion %v - currentRegion %v", size, lastRegion, currentRegion))
}
return false
}
// If the last buffer wasn't read complete the current one can't be overlapped
if lastRegion.Size != size && overlappedBytes > 0 {
t.Error(fmt.Sprintf("Overlapped buffer after non-complete one. "+
"buffer size %d - lastRegion %v - currentRegion %v", size, lastRegion, currentRegion))
return false
}
// Overlapped bytes should be half of the buffer, or the buffer must came from another region
if overlappedBytes != uintptr(size/2) && overlappedBytes != 0 {
t.Error(fmt.Sprintf("Overlapping buffer by %d bytes. "+
"buffer size %d - lastRegion %v - currentRegion %v", overlappedBytes, size, lastRegion,
currentRegion))
return false
}
lastRegion = currentRegion
return true
})
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
}
}
func TestWalkRegionReadsEntireRegion(t *testing.T) {
cmd, err := test.LaunchTestCaseAndWaitForInitialization()
if err != nil {
t.Fatal(err)
}
defer cmd.Process.Kill()
pid := uint(cmd.Process.Pid)
proc, err, softerrors := process.OpenFromPid(pid)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
pageSize := uint(os.Getpagesize())
bufferSizes := []uint{1024, pageSize, pageSize + 100, pageSize * 2, pageSize*2 + 123}
var region MemoryRegion
region, err, softerrors = NextReadableMemoryRegion(proc, 0)
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
if region == NoRegionAvailable {
t.Error("No starting region returned")
}
min_region_size := bufferSizes[len(bufferSizes)-1]
for region.Size < min_region_size {
if region == NoRegionAvailable {
t.Fatal("We couldn't find a region of %d bytes", min_region_size)
}
region, err, softerrors = NextReadableMemoryRegion(proc, region.Address+uintptr(region.Size))
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
}
for _, size := range bufferSizes {
buf := make([]byte, size)
readRegion := MemoryRegion{}
_, _, err, softerrors := walkRegion(proc, region, buf,
func(address uintptr, buffer []byte) (keepSearching bool) {
if readRegion.Address == 0 {
readRegion.Address = address
readRegion.Size = uint(len(buffer))
return true
}
readRegionLimit := readRegion.Address + uintptr(readRegion.Size)
if readRegionLimit != address {
t.Error(fmt.Sprintf("walkRegion skept %d bytes starting at %x", address-readRegionLimit,
readRegionLimit))
return false
}
readRegion.Size += uint(len(buffer))
return true
})
test.PrintSoftErrors(softerrors)
if err != nil {
t.Fatal(err)
}
if region != readRegion {
t.Error(fmt.Sprintf("%v not entirely read", region))
}
}
}