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package proc
import (
"os"
"path/filepath"
"runtime"
"testing"
"unsafe"
protest "github.com/go-delve/delve/pkg/proc/test"
)
func ptrSizeByRuntimeArch() int {
return int(unsafe.Sizeof(uintptr(0)))
}
func TestIssue554(t *testing.T) {
// unsigned integer overflow in proc.(*memCache).contains was
// causing it to always return true for address 0xffffffffffffffff
mem := memCache{true, 0x20, make([]byte, 100), nil}
var addr uint64
switch ptrSizeByRuntimeArch() {
case 4:
addr = 0xffffffff
case 8:
addr = 0xffffffffffffffff
}
if mem.contains(addr, 40) {
t.Fatalf("should be false")
}
}
func TestIssue3760(t *testing.T) {
// unsigned integer overflow if len(m.cache) < size
mem := memCache{true, 0x20, make([]byte, 100), nil}
if mem.contains(0x20, 200) {
t.Fatalf("should be false")
}
// test overflow of end addr
mem = memCache{true, 0xfffffffffffffff0, make([]byte, 15), nil}
if !mem.contains(0xfffffffffffffff0, 15) {
t.Fatalf("should contain it")
}
if mem.contains(0xfffffffffffffff0, 16) {
t.Fatalf("should be false")
}
cm := cacheMemory(nil, 0xffffffffffffffff, 1)
if cm != nil {
t.Fatalf("should be nil")
}
}
type dummyMem struct {
t *testing.T
mem []byte
base uint64
reads []memRead
}
type memRead struct {
addr uint64
size int
}
func (dm *dummyMem) ReadMemory(buf []byte, addr uint64) (int, error) {
dm.t.Logf("read addr=%#x size=%#x\n", addr, len(buf))
dm.reads = append(dm.reads, memRead{addr, len(buf)})
a := int64(addr) - int64(dm.base)
if a < 0 {
panic("reading below base")
}
if int(a)+len(buf) > len(dm.mem) {
panic("reading beyond end of mem")
}
copy(buf, dm.mem[a:])
return len(buf), nil
}
func (dm *dummyMem) WriteMemory(uint64, []byte) (int, error) {
panic("not supported")
}
func TestReadCStringValue(t *testing.T) {
const tgt = "a test string"
const maxstrlen = 64
dm := &dummyMem{t: t}
dm.mem = make([]byte, maxstrlen)
copy(dm.mem, tgt)
for _, tc := range []struct {
base uint64
numreads int
}{
{0x5000, 1},
{0x5001, 1},
{0x4fff, 2},
{uint64(0x5000 - len(tgt) - 1), 1},
{uint64(0x5000-len(tgt)-1) + 1, 2},
} {
t.Logf("base is %#x\n", tc.base)
dm.base = tc.base
dm.reads = dm.reads[:0]
out, done, err := readCStringValue(dm, tc.base, LoadConfig{MaxStringLen: maxstrlen})
if err != nil {
t.Errorf("base=%#x readCStringValue: %v", tc.base, err)
}
if !done {
t.Errorf("base=%#x expected done but wasn't", tc.base)
}
if out != tgt {
t.Errorf("base=%#x got %q expected %q", tc.base, out, tgt)
}
if len(dm.reads) != tc.numreads {
t.Errorf("base=%#x wrong number of reads %d (expected %d)", tc.base, len(dm.reads), tc.numreads)
}
if tc.base == 0x4fff && dm.reads[0].size != 1 {
t.Errorf("base=%#x first read in not of one byte", tc.base)
}
}
}
func assertNoError(err error, t testing.TB, s string) {
if err != nil {
_, file, line, _ := runtime.Caller(1)
fname := filepath.Base(file)
t.Fatalf("failed assertion at %s:%d: %s - %s\n", fname, line, s, err)
}
}
func TestDwarfVersion(t *testing.T) {
// Tests that we correctly read the version of compilation units
fixture := protest.BuildFixture("math", 0)
bi := NewBinaryInfo(runtime.GOOS, runtime.GOARCH)
// Use a fake entry point so LoadBinaryInfo does not error in case the binary is PIE.
const fakeEntryPoint = 1
assertNoError(bi.LoadBinaryInfo(fixture.Path, fakeEntryPoint, nil), t, "LoadBinaryInfo")
for _, cu := range bi.Images[0].compileUnits {
if cu.Version != 4 {
t.Errorf("compile unit %q at %#x has bad version %d", cu.name, cu.entry.Offset, cu.Version)
}
}
}
func TestRegabiFlagSentinel(t *testing.T) {
// Detect if the regabi flag in the producer string gets removed
if !protest.RegabiSupported() {
t.Skip("irrelevant before Go 1.17 or on non-amd64 architectures")
}
fixture := protest.BuildFixture("math", 0)
bi := NewBinaryInfo(runtime.GOOS, runtime.GOARCH)
// Use a fake entry point so LoadBinaryInfo does not error in case the binary is PIE.
const fakeEntryPoint = 1
assertNoError(bi.LoadBinaryInfo(fixture.Path, fakeEntryPoint, nil), t, "LoadBinaryInfo")
if !bi.regabi {
t.Errorf("regabi flag not set %s GOEXPERIMENT=%s", runtime.Version(), os.Getenv("GOEXPERIMENT"))
}
}
func TestGenericFunctionParser(t *testing.T) {
// Normal parsing
var testCases = []struct{ name, pkg, rcv, base string }{
{"github.com/go-delve/delve.afunc", "github.com/go-delve/delve", "", "afunc"},
{"github.com/go-delve/delve..afunc", "github.com/go-delve/delve", "", "afunc"}, // malformed
{"github.com/go-delve/delve.afunc[some/[thing].el se]", "github.com/go-delve/delve", "", "afunc[some/[thing].el se]"},
{"github.com/go-delve/delve.Receiver.afunc", "github.com/go-delve/delve", "Receiver", "afunc"},
{"github.com/go-delve/delve.(*Receiver).afunc", "github.com/go-delve/delve", "(*Receiver)", "afunc"},
{"github.com/go-delve/delve.Receiver.afunc[some/[thing].el se]", "github.com/go-delve/delve", "Receiver", "afunc[some/[thing].el se]"}, // malformed
{"github.com/go-delve/delve.(*Receiver).afunc[some/[thing].el se]", "github.com/go-delve/delve", "(*Receiver)", "afunc[some/[thing].el se]"}, // malformed
{"github.com/go-delve/delve.Receiver[some/[thing].el se].afunc", "github.com/go-delve/delve", "Receiver[some/[thing].el se]", "afunc"},
{"github.com/go-delve/delve.(*Receiver[some/[thing].el se]).afunc", "github.com/go-delve/delve", "(*Receiver[some/[thing].el se])", "afunc"},
{"github.com/go-delve/delve.afunc[.some/[thing].el se]", "github.com/go-delve/delve", "", "afunc[.some/[thing].el se]"},
{"github.com/go-delve/delve.Receiver.afunc[.some/[thing].el se]", "github.com/go-delve/delve", "Receiver", "afunc[.some/[thing].el se]"}, // malformed
{"github.com/go-delve/delve.Receiver[.some/[thing].el se].afunc", "github.com/go-delve/delve", "Receiver[.some/[thing].el se]", "afunc"},
{"github.com/go-delve/delve.(*Receiver[.some/[thing].el se]).afunc", "github.com/go-delve/delve", "(*Receiver[.some/[thing].el se])", "afunc"},
}
for _, tc := range testCases {
fn := &Function{Name: tc.name}
if fn.PackageName() != tc.pkg {
t.Errorf("Package name mismatch: %q %q", tc.pkg, fn.PackageName())
}
if fn.ReceiverName() != tc.rcv {
t.Errorf("Receiver name mismatch: %q %q", tc.rcv, fn.ReceiverName())
}
if fn.BaseName() != tc.base {
t.Errorf("Base name mismatch: %q %q", tc.base, fn.BaseName())
}
}
}
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