/
peek_test.go
1075 lines (1024 loc) · 38.6 KB
/
peek_test.go
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// Copyright 2019 Google LLC
//
// 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.
//go:build linux
// +build linux
package peek_test
import (
"flag"
"fmt"
"log"
"os"
"os/exec"
"reflect"
"regexp"
"sync"
"testing"
"cloud.google.com/go/cmd/go-cloud-debug-agent/internal/debug"
"cloud.google.com/go/cmd/go-cloud-debug-agent/internal/debug/local"
"cloud.google.com/go/cmd/go-cloud-debug-agent/internal/debug/remote"
)
var expectedVarValues = map[string]interface{}{
`main.Z_bool_false`: false,
`main.Z_bool_true`: true,
`main.Z_complex128`: complex128(1.987654321 - 2.987654321i),
`main.Z_complex64`: complex64(1.54321 + 2.54321i),
`main.Z_float32`: float32(1.54321),
`main.Z_float64`: float64(1.987654321),
`main.Z_int16`: int16(-32321),
`main.Z_int32`: int32(-1987654321),
`main.Z_int64`: int64(-9012345678987654321),
`main.Z_int8`: int8(-121),
`main.Z_uint16`: uint16(54321),
`main.Z_uint32`: uint32(3217654321),
`main.Z_uint64`: uint64(12345678900987654321),
`main.Z_uint8`: uint8(231),
}
// TODO: the string forms of some types we're testing aren't stable
var expectedVars = map[string]string{
`main.Z_array`: `[5]int8{-121, 121, 3, 2, 1}`,
`main.Z_array_empty`: `[0]int8{}`,
`main.Z_bool_false`: `false`,
`main.Z_bool_true`: `true`,
`main.Z_channel`: `(chan int16 0xX)`,
`main.Z_channel_2`: `(chan int16 0xX)`,
`main.Z_channel_buffered`: `(chan int16 0xX [6/10])`,
`main.Z_channel_nil`: `(chan int16 <nil>)`,
`main.Z_array_of_empties`: `[2]{}{{} {}, ({} 0xX)}`,
`main.Z_complex128`: `(1.987654321-2.987654321i)`,
`main.Z_complex64`: `(1.54321+2.54321i)`,
`main.Z_float32`: `1.54321`,
`main.Z_float64`: `1.987654321`,
`main.Z_func_int8_r_int8`: `func(int8, *int8) void @0xX `,
`main.Z_func_int8_r_pint8`: `func(int8, **int8) void @0xX `,
`main.Z_func_bar`: `func(*main.FooStruct) void @0xX `,
`main.Z_func_nil`: `func(int8, *int8) void @0xX `,
`main.Z_int`: `-21`,
`main.Z_int16`: `-32321`,
`main.Z_int32`: `-1987654321`,
`main.Z_int64`: `-9012345678987654321`,
`main.Z_int8`: `-121`,
`main.Z_int_typedef`: `88`,
`main.Z_interface`: `("*main.FooStruct", 0xX)`,
`main.Z_interface_nil`: `(<nil>, <nil>)`,
`main.Z_interface_typed_nil`: `("*main.FooStruct", <nil>)`,
`main.Z_map`: `map[-21:3.54321]`,
`main.Z_map_2`: `map[1024:1]`,
`main.Z_map_3`: `map[1024:1 512:-1]`,
`main.Z_map_empty`: `map[]`,
`main.Z_map_nil`: `map[]`,
`main.Z_pointer`: `0xX`,
`main.Z_pointer_nil`: `0x0`,
`main.Z_slice`: `[]uint8{115, 108, 105, 99, 101}`,
`main.Z_slice_2`: `[]int8{-121, 121}`,
`main.Z_slice_nil`: `[]uint8{}`,
`main.Z_string`: `"I'm a string"`,
`main.Z_struct`: `main.FooStruct {21, "hi"}`,
`main.Z_uint`: `21`,
`main.Z_uint16`: `54321`,
`main.Z_uint32`: `3217654321`,
`main.Z_uint64`: `12345678900987654321`,
`main.Z_uint8`: `231`,
`main.Z_uintptr`: `21`,
`main.Z_unsafe_pointer`: `0xX`,
`main.Z_unsafe_pointer_nil`: `0x0`,
}
// expectedEvaluate contains expected results of the debug.Evaluate function.
// A nil value indicates that an error is expected.
var expectedEvaluate = map[string]debug.Value{
`x`: int16(42),
`local_array`: debug.Array{42, 42, 5, 8},
`local_channel`: debug.Channel{42, 42, 42, 0, 0, 2, 0},
`local_channel_buffered`: debug.Channel{42, 42, 42, 6, 10, 2, 8},
`local_map`: debug.Map{42, 42, 1},
`local_map_2`: debug.Map{42, 42, 1},
`local_map_3`: debug.Map{42, 42, 2},
`local_map_empty`: debug.Map{42, 42, 0},
`x + 5`: int16(47),
`x - 5`: int16(37),
`x / 5`: int16(8),
`x % 5`: int16(2),
`x & 2`: int16(2),
`x | 1`: int16(43),
`x ^ 3`: int16(41),
`5 + x`: int16(47),
`5 - x`: int16(-37),
`100 / x`: int16(2),
`100 % x`: int16(16),
`2 & x`: int16(2),
`1 | x`: int16(43),
`3 ^ x`: int16(41),
`12`: 12,
`+42`: 42,
`23i`: 23i,
`34.0`: 34.0,
`34.5`: 34.5,
`1e5`: 100000.0,
`0x42`: 66,
`'c'`: 'c',
`"de"`: debug.String{2, `de`},
"`ef`": debug.String{2, `ef`},
`"de" + "fg"`: debug.String{4, `defg`},
`/* comment */ -5`: -5,
`false`: false,
`true`: true,
`!false`: true,
`!true`: false,
`5 + 5`: 10,
`true || false`: true,
`false || false`: false,
`true && false`: false,
`true && true`: true,
`!(5 > 8)`: true,
`10 + 'a'`: 'k',
`10 + 10.5`: 20.5,
`10 + 10.5i`: 10 + 10.5i,
`'a' + 10.5`: 107.5,
`'a' + 10.5i`: 97 + 10.5i,
`10.5 + 20.5i`: 10.5 + 20.5i,
`10 * 20`: 200,
`10.0 - 20.5`: -10.5,
`(6 + 8i) * 4`: 24 + 32i,
`(6 + 8i) * (1 + 1i)`: -2 + 14i,
`(6 + 8i) * (6 - 8i)`: complex128(100),
`(6 + 8i) / (3 + 4i)`: complex128(2),
`local_array[2]`: int8(3),
`&local_array[1]`: debug.Pointer{42, 42},
`local_map[-21]`: float32(3.54321),
`local_map[+21]`: float32(0),
`local_map_3[1024]`: int8(1),
`local_map_3[512]`: int8(-1),
`local_map_empty[21]`: float32(0),
`"hello"[2]`: uint8('l'),
`local_array[1:3][1]`: int8(3),
`local_array[0:4][2:3][0]`: int8(3),
`local_array[:]`: debug.Slice{debug.Array{42, 42, 5, 8}, 5},
`local_array[:2]`: debug.Slice{debug.Array{42, 42, 2, 8}, 5},
`local_array[2:]`: debug.Slice{debug.Array{42, 42, 3, 8}, 3},
`local_array[1:3]`: debug.Slice{debug.Array{42, 42, 2, 8}, 4},
`local_array[:3:4]`: debug.Slice{debug.Array{42, 42, 3, 8}, 4},
`local_array[1:3:4]`: debug.Slice{debug.Array{42, 42, 2, 8}, 3},
`local_array[1:][1:][1:]`: debug.Slice{debug.Array{42, 42, 2, 8}, 2},
`(&local_array)[:]`: debug.Slice{debug.Array{42, 42, 5, 8}, 5},
`(&local_array)[:2]`: debug.Slice{debug.Array{42, 42, 2, 8}, 5},
`(&local_array)[2:]`: debug.Slice{debug.Array{42, 42, 3, 8}, 3},
`(&local_array)[1:3]`: debug.Slice{debug.Array{42, 42, 2, 8}, 4},
`(&local_array)[:3:4]`: debug.Slice{debug.Array{42, 42, 3, 8}, 4},
`(&local_array)[1:3:4]`: debug.Slice{debug.Array{42, 42, 2, 8}, 3},
`lookup("main.Z_array")`: debug.Array{42, 42, 5, 8},
`lookup("main.Z_array_empty")`: debug.Array{42, 42, 0, 8},
`lookup("main.Z_bool_false")`: false,
`lookup("main.Z_bool_true")`: true,
`lookup("main.Z_channel")`: debug.Channel{42, 42, 42, 0, 0, 2, 0},
`lookup("main.Z_channel_buffered")`: debug.Channel{42, 42, 42, 6, 10, 2, 8},
`lookup("main.Z_channel_nil")`: debug.Channel{42, 0, 0, 0, 0, 2, 0},
`lookup("main.Z_array_of_empties")`: debug.Array{42, 42, 2, 0},
`lookup("main.Z_complex128")`: complex128(1.987654321 - 2.987654321i),
`lookup("main.Z_complex64")`: complex64(1.54321 + 2.54321i),
`lookup("main.Z_float32")`: float32(1.54321),
`lookup("main.Z_float64")`: float64(1.987654321),
`lookup("main.Z_func_int8_r_int8")`: debug.Func{42},
`lookup("main.Z_func_int8_r_pint8")`: debug.Func{42},
`lookup("main.Z_func_bar")`: debug.Func{42},
`lookup("main.Z_func_nil")`: debug.Func{0},
`lookup("main.Z_int")`: -21,
`lookup("main.Z_int16")`: int16(-32321),
`lookup("main.Z_int32")`: int32(-1987654321),
`lookup("main.Z_int64")`: int64(-9012345678987654321),
`lookup("main.Z_int8")`: int8(-121),
`lookup("main.Z_int_typedef")`: int16(88),
`lookup("main.Z_interface")`: debug.Interface{},
`lookup("main.Z_interface_nil")`: debug.Interface{},
`lookup("main.Z_interface_typed_nil")`: debug.Interface{},
`lookup("main.Z_map")`: debug.Map{42, 42, 1},
`lookup("main.Z_map_2")`: debug.Map{42, 42, 1},
`lookup("main.Z_map_3")`: debug.Map{42, 42, 2},
`lookup("main.Z_map_empty")`: debug.Map{42, 42, 0},
`lookup("main.Z_map_nil")`: debug.Map{42, 42, 0},
`lookup("main.Z_pointer")`: debug.Pointer{42, 42},
`lookup("main.Z_pointer_nil")`: debug.Pointer{42, 0},
`lookup("main.Z_slice")`: debug.Slice{debug.Array{42, 42, 5, 8}, 5},
`lookup("main.Z_slice_2")`: debug.Slice{debug.Array{42, 42, 2, 8}, 5},
`lookup("main.Z_slice_nil")`: debug.Slice{debug.Array{42, 0, 0, 8}, 0},
`lookup("main.Z_string")`: debug.String{12, `I'm a string`},
`lookup("main.Z_struct")`: debug.Struct{[]debug.StructField{{"a", debug.Var{}}, {"b", debug.Var{}}}},
`lookup("main.Z_uint")`: uint(21),
`lookup("main.Z_uint16")`: uint16(54321),
`lookup("main.Z_uint32")`: uint32(3217654321),
`lookup("main.Z_uint64")`: uint64(12345678900987654321),
`lookup("main.Z_uint8")`: uint8(231),
`lookup("main.Z_uintptr")`: uint(21),
`lookup("main.Z_unsafe_pointer")`: debug.Pointer{0, 42},
`lookup("main.Z_unsafe_pointer_nil")`: debug.Pointer{0, 0},
`lookup("main.Z_int") + lookup("main.Z_int")`: -42,
`lookup("main.Z_int16") < 0`: true,
`lookup("main.Z_uint32") + lookup("main.Z_uint32")`: uint32(2140341346),
`lookup("main.Z_bool_true") || lookup("main.Z_bool_false")`: true,
`lookup("main.Z_bool_true") && lookup("main.Z_bool_false")`: false,
`lookup("main.Z_bool_false") || lookup("main.Z_bool_false")`: false,
`!lookup("main.Z_bool_true")`: false,
`!lookup("main.Z_bool_false")`: true,
`lookup("main.Z_array")[2]`: int8(3),
`lookup("main.Z_array")[1:3][1]`: int8(3),
`lookup("main.Z_array")[0:4][2:3][0]`: int8(3),
`lookup("main.Z_array_of_empties")[0]`: debug.Struct{},
`lookup("main.Z_complex128") * 10.0`: complex128(19.87654321 - 29.87654321i),
`lookup("main.Z_complex64") * 0.1`: complex64(0.154321 + 0.254321i),
`lookup("main.Z_float32") * 10.0`: float32(15.4321),
`lookup("main.Z_float64") * 0.1`: float64(0.1987654321),
`lookup("main.Z_int") + 1`: int(-20),
`lookup("main.Z_int16") - 10`: int16(-32331),
`lookup("main.Z_int32") / 10`: int32(-198765432),
`lookup("main.Z_int64") / 10`: int64(-901234567898765432),
`lookup("main.Z_int8") + 10`: int8(-111),
`lookup("main.Z_map")[-21]`: float32(3.54321),
`lookup("main.Z_map")[+21]`: float32(0),
`lookup("main.Z_map_empty")[21]`: float32(0),
`lookup("main.Z_slice")[1]`: uint8(108),
`lookup("main.Z_slice_2")[1]`: int8(121),
`lookup("main.Z_slice")[1:5][0:3][1]`: uint8('i'),
`lookup("main.Z_array")[1:3:4]`: debug.Slice{debug.Array{42, 42, 2, 8}, 3},
`(&lookup("main.Z_array"))[1:3:4]`: debug.Slice{debug.Array{42, 42, 2, 8}, 3},
`lookup("main.Z_string") + "!"`: debug.String{13, `I'm a string!`},
`lookup("main.Z_struct").a`: 21,
`(&lookup("main.Z_struct")).a`: 21,
`lookup("main.Z_uint")/10`: uint(2),
`lookup("main.Z_uint16")/10`: uint16(5432),
`lookup("main.Z_uint32")/10`: uint32(321765432),
`lookup("main.Z_uint64")/10`: uint64(1234567890098765432),
`lookup("main.Z_uint8")/10`: uint8(23),
`lookup("main.Z_pointer").a`: 21,
`(*lookup("main.Z_pointer")).a`: 21,
`(&*lookup("main.Z_pointer")).a`: 21,
`lookup("main.Z_pointer").b`: debug.String{2, `hi`},
`(*lookup("main.Z_pointer")).b`: debug.String{2, `hi`},
`(&*lookup("main.Z_pointer")).b`: debug.String{2, `hi`},
`lookup("main.Z_map_nil")[32]`: float32(0),
`&lookup("main.Z_int16")`: debug.Pointer{42, 42},
`&lookup("main.Z_array")[1]`: debug.Pointer{42, 42},
`&lookup("main.Z_slice")[1]`: debug.Pointer{42, 42},
`*&lookup("main.Z_int16")`: int16(-32321),
`*&*&*&*&lookup("main.Z_int16")`: int16(-32321),
`lookup("time.Local")`: debug.Pointer{42, 42},
`5 + false`: nil,
``: nil,
`x + ""`: nil,
`x / 0`: nil,
`0 / 0`: nil,
`'a' / ('a'-'a')`: nil,
`0.0 / 0.0`: nil,
`3i / 0.0`: nil,
`x % 0`: nil,
`0 % 0`: nil,
`'a' % ('a'-'a')`: nil,
`local_array[-2] + 1`: nil,
`local_array[22] + 1`: nil,
`local_slice[-2] + 1`: nil,
`local_slice[22] + 1`: nil,
`local_string[-2]`: nil,
`local_string[22]`: nil,
`"hello"[-2]`: nil,
`"hello"[22]`: nil,
`local_pointer_nil.a`: nil,
`(local_struct).c`: nil,
`(&local_struct).c`: nil,
`(*local_pointer).c`: nil,
`lookup("not a real symbol")`: nil,
`lookup("x")`: nil,
`lookup(x)`: nil,
`lookup(42)`: nil,
}
func isHex(r uint8) bool {
switch {
case '0' <= r && r <= '9':
return true
case 'a' <= r && r <= 'f':
return true
case 'A' <= r && r <= 'F':
return true
default:
return false
}
}
// structRE is used by matches to remove 'struct ' from type names, which is not
// output by every version of the compiler.
var structRE = regexp.MustCompile("struct *")
// Check s matches the pattern in p.
// An 'X' in p greedily matches one or more hex characters in s.
func matches(p, s string) bool {
// Remove 'struct' and following spaces from s.
s = structRE.ReplaceAllString(s, "")
j := 0
for i := 0; i < len(p); i++ {
if j == len(s) {
return false
}
c := p[i]
if c == 'X' {
if !isHex(s[j]) {
return false
}
for j < len(s) && isHex(s[j]) {
j++
}
continue
}
if c != s[j] {
return false
}
j++
}
return j == len(s)
}
const (
proxySrc = "cloud.google.com/go/cmd/go-cloud-debug-agent/internal/debug/cmd/debugproxy"
traceeSrc = "cloud.google.com/go/cmd/go-cloud-debug-agent/internal/debug/tests/peek/testdata"
)
var (
// Locations of the proxy and tracee executables.
proxyBinary = "./debugproxy.out"
traceeBinary = "./tracee.out"
// Onces that ensure initProxy and initTracee are called at most once.
proxyOnce sync.Once
traceeOnce sync.Once
// Flags for setting the location of the proxy and tracee, so they don't need to be built.
proxyFlag = flag.String("proxy", "", "Location of debugproxy. If empty, proxy will be built.")
traceeFlag = flag.String("target", "", "Location of target. If empty, target will be built.")
// Executables this test has built, which will be removed on completion of the tests.
filesToRemove []string
)
func TestMain(m *testing.M) {
flag.Parse()
x := m.Run()
for _, f := range filesToRemove {
os.Remove(f)
}
os.Exit(x)
}
func run(name string, args ...string) error {
cmd := exec.Command(name, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
return cmd.Run()
}
func initProxy() {
if *proxyFlag != "" {
proxyBinary = *proxyFlag
remote.DebugproxyCmd = proxyBinary
return
}
if err := run("go", "build", "-o", proxyBinary, proxySrc); err != nil {
log.Fatalf("couldn't build proxy: %v", err)
}
filesToRemove = append(filesToRemove, proxyBinary)
remote.DebugproxyCmd = proxyBinary
}
func initTracee() {
if *traceeFlag != "" {
traceeBinary = *traceeFlag
return
}
if err := run("go", "build", "-o", traceeBinary, traceeSrc); err != nil {
log.Fatalf("couldn't build target: %v", err)
}
filesToRemove = append(filesToRemove, traceeBinary)
}
func TestLocalProgram(t *testing.T) {
t.Skip("Fails looking for runtime.lessstack for some reason")
traceeOnce.Do(initTracee)
prog, err := local.New(traceeBinary)
if err != nil {
t.Fatal("local.New:", err)
}
testProgram(t, prog)
}
func TestRemoteProgram(t *testing.T) {
t.Skip("Fails looking for runtime.lessstack for some reason")
traceeOnce.Do(initTracee)
proxyOnce.Do(initProxy)
prog, err := remote.New("localhost", traceeBinary)
if err != nil {
t.Fatal("remote.New:", err)
}
testProgram(t, prog)
}
func testProgram(t *testing.T, prog debug.Program) {
_, err := prog.Run("some", "arguments")
if err != nil {
log.Fatalf("Run: %v", err)
}
pcs, err := prog.BreakpointAtFunction("main.foo")
if err != nil {
log.Fatalf("BreakpointAtFunction: %v", err)
}
fmt.Printf("breakpoints set at %x\n", pcs)
_, err = prog.Resume()
if err != nil {
log.Fatalf("Resume: %v", err)
}
gs, err := prog.Goroutines()
if err != nil {
t.Fatalf("Goroutines(): got error %s", err)
}
for _, g := range gs {
fmt.Println(g)
for _, f := range g.StackFrames {
fmt.Println(f)
}
}
frames, err := prog.Frames(100)
if err != nil {
log.Fatalf("prog.Frames error: %v", err)
}
fmt.Printf("%#v\n", frames)
if len(frames) == 0 {
t.Fatalf("no stack frames returned")
}
if frames[0].Function != "main.foo" {
t.Errorf("function name: got %s expected main.foo", frames[0].Function)
}
if len(frames[0].Params) != 2 {
t.Errorf("got %d parameters, expected 2", len(frames[0].Params))
} else {
x := frames[0].Params[0]
y := frames[0].Params[1]
if x.Name != "x" {
x, y = y, x
}
if x.Name != "x" {
t.Errorf("parameter name: got %s expected x", x.Name)
}
if y.Name != "y" {
t.Errorf("parameter name: got %s expected y", y.Name)
}
if val, err := prog.Value(x.Var); err != nil {
t.Errorf("value of x: %s", err)
} else if val != int16(42) {
t.Errorf("value of x: got %T(%v) expected int16(42)", val, val)
}
if val, err := prog.Value(y.Var); err != nil {
t.Errorf("value of y: %s", err)
} else if val != float32(1.5) {
t.Errorf("value of y: got %T(%v) expected float32(1.5)", val, val)
}
}
varnames, err := prog.Eval(`re:main\.Z_.*`)
if err != nil {
log.Fatalf("prog.Eval error: %v", err)
}
// Evaluate each of the variables found above, and check they match
// expectedVars.
seen := make(map[string]bool)
for _, v := range varnames {
val, err := prog.Eval("val:" + v)
if err != nil {
log.Fatalf("prog.Eval error for %s: %v", v, err)
} else {
fmt.Printf("%s = %v\n", v, val)
if seen[v] {
log.Fatalf("repeated variable %s\n", v)
}
seen[v] = true
if len(val) != 1 {
log.Fatalf("should be one value for %s\n", v)
}
expected, ok := expectedVars[v]
if !ok {
log.Fatalf("unexpected variable %s\n", v)
} else {
if !matches(expected, val[0]) {
log.Fatalf("expected %s = %s\n", v, expected)
}
}
}
}
for v, e := range expectedVars {
if !seen[v] {
log.Fatalf("didn't get %s = %s\n", v, e)
}
}
// Remove the breakpoint at main.foo.
err = prog.DeleteBreakpoints(pcs)
if err != nil {
log.Fatalf("DeleteBreakpoints: %v", err)
}
// Set a breakpoint at line 125, resume, and check we stopped there.
pcsLine125, err := prog.BreakpointAtLine("testdata/main.go", 125)
if err != nil {
t.Fatal("BreakpointAtLine:", err)
}
status, err := prog.Resume()
if err != nil {
log.Fatalf("Resume: %v", err)
}
stoppedAt := func(pcs []uint64) bool {
for _, pc := range pcs {
if status.PC == pc {
return true
}
}
return false
}
if !stoppedAt(pcsLine125) {
t.Errorf("stopped at %X; expected one of %X.", status.PC, pcsLine125)
}
for k, v := range expectedEvaluate {
val, err := prog.Evaluate(k)
if v == nil {
if err == nil {
t.Errorf("got Evaluate(%s) = %v, expected error", k, val)
}
continue
}
if err != nil {
t.Errorf("Evaluate(%s): got error %s, expected %v", k, err, v)
continue
}
typ := reflect.TypeOf(v)
if typ != reflect.TypeOf(val) && typ != reflect.TypeOf(int(0)) && typ != reflect.TypeOf(uint(0)) {
t.Errorf("got Evaluate(%s) = %T(%v), expected %T(%v)", k, val, val, v, v)
continue
}
// For types with fields like Address, TypeID, etc., we can't know the exact
// value, so we only test whether those fields are zero or not.
switch v := v.(type) {
default:
if v != val {
t.Errorf("got Evaluate(%s) = %T(%v), expected %T(%v)", k, val, val, v, v)
}
case debug.Array:
val := val.(debug.Array)
if v.ElementTypeID == 0 && val.ElementTypeID != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero ElementTypeID", k, val)
}
if v.ElementTypeID != 0 && val.ElementTypeID == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero ElementTypeID", k, val)
}
if v.Address == 0 && val.Address != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero Address", k, val)
}
if v.Address != 0 && val.Address == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero Address", k, val)
}
case debug.Slice:
val := val.(debug.Slice)
if v.ElementTypeID == 0 && val.ElementTypeID != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero ElementTypeID", k, val)
}
if v.ElementTypeID != 0 && val.ElementTypeID == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero ElementTypeID", k, val)
}
if v.Address == 0 && val.Address != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero Address", k, val)
}
if v.Address != 0 && val.Address == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero Address", k, val)
}
case debug.Map:
val := val.(debug.Map)
if v.TypeID == 0 && val.TypeID != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero TypeID", k, val)
}
if v.TypeID != 0 && val.TypeID == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero TypeID", k, val)
}
if v.Address == 0 && val.Address != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero Address", k, val)
}
if v.Address != 0 && val.Address == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero Address", k, val)
}
case debug.Pointer:
val := val.(debug.Pointer)
if v.TypeID == 0 && val.TypeID != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero TypeID", k, val)
}
if v.TypeID != 0 && val.TypeID == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero TypeID", k, val)
}
if v.Address == 0 && val.Address != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero Address", k, val)
}
if v.Address != 0 && val.Address == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero Address", k, val)
}
case debug.Channel:
val := val.(debug.Channel)
if v.ElementTypeID == 0 && val.ElementTypeID != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero ElementTypeID", k, val)
}
if v.ElementTypeID != 0 && val.ElementTypeID == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero ElementTypeID", k, val)
}
if v.Address == 0 && val.Address != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero Address", k, val)
}
if v.Address != 0 && val.Address == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero Address", k, val)
}
if v.Buffer == 0 && val.Buffer != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero Buffer", k, val)
}
if v.Buffer != 0 && val.Buffer == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero Buffer", k, val)
}
case debug.Struct:
val := val.(debug.Struct)
if len(v.Fields) != len(val.Fields) {
t.Errorf("got Evaluate(%s) = %T(%v), expected %T(%v)", k, val, val, v, v)
break
}
for i := range v.Fields {
a := v.Fields[i].Name
b := val.Fields[i].Name
if a != b {
t.Errorf("Evaluate(%s): field name mismatch: %s vs %s", k, a, b)
break
}
}
case debug.Func:
val := val.(debug.Func)
if v.Address == 0 && val.Address != 0 {
t.Errorf("got Evaluate(%s) = %+v, expected zero Address", k, val)
}
if v.Address != 0 && val.Address == 0 {
t.Errorf("got Evaluate(%s) = %+v, expected non-zero Address", k, val)
}
case int:
// ints in a remote program can be returned as int32 or int64
switch val := val.(type) {
case int32:
if val != int32(v) {
t.Errorf("got Evaluate(%s) = %T(%v), expected %v", k, val, val, v)
}
case int64:
if val != int64(v) {
t.Errorf("got Evaluate(%s) = %T(%v), expected %v", k, val, val, v)
}
default:
t.Errorf("got Evaluate(%s) = %T(%v), expected %T(%v)", k, val, val, v, v)
}
case uint:
// uints in a remote program can be returned as uint32 or uint64
switch val := val.(type) {
case uint32:
if val != uint32(v) {
t.Errorf("got Evaluate(%s) = %T(%v), expected %v", k, val, val, v)
}
case uint64:
if val != uint64(v) {
t.Errorf("got Evaluate(%s) = %T(%v), expected %v", k, val, val, v)
}
default:
t.Errorf("got Evaluate(%s) = %T(%v), expected %T(%v)", k, val, val, v, v)
}
}
}
// Evaluate a struct.
v := `lookup("main.Z_struct")`
val, err := prog.Evaluate(v)
if err != nil {
t.Fatalf("Evaluate: %s", err)
}
s, ok := val.(debug.Struct)
if !ok {
t.Fatalf("got Evaluate(%q) = %T(%v), expected debug.Struct", v, val, val)
}
// Check the values of its fields.
if len(s.Fields) != 2 {
t.Fatalf("got Evaluate(%q) = %+v, expected 2 fields", v, s)
}
if v0, err := prog.Value(s.Fields[0].Var); err != nil {
t.Errorf("Value: %s", err)
} else if v0 != int32(21) && v0 != int64(21) {
t.Errorf("Value: got %T(%v), expected 21", v0, v0)
}
if v1, err := prog.Value(s.Fields[1].Var); err != nil {
t.Errorf("Value: %s", err)
} else if v1 != (debug.String{2, "hi"}) {
t.Errorf("Value: got %T(%v), expected `hi`", v1, v1)
}
// Remove the breakpoint at line 125, set a breakpoint at main.f1 and main.f2,
// then delete the breakpoint at main.f1. Resume, then check we stopped at
// main.f2.
err = prog.DeleteBreakpoints(pcsLine125)
if err != nil {
log.Fatalf("DeleteBreakpoints: %v", err)
}
pcs1, err := prog.BreakpointAtFunction("main.f1")
if err != nil {
log.Fatalf("BreakpointAtFunction: %v", err)
}
pcs2, err := prog.BreakpointAtFunction("main.f2")
if err != nil {
log.Fatalf("BreakpointAtFunction: %v", err)
}
err = prog.DeleteBreakpoints(pcs1)
if err != nil {
log.Fatalf("DeleteBreakpoints: %v", err)
}
status, err = prog.Resume()
if err != nil {
log.Fatalf("Resume: %v", err)
}
if !stoppedAt(pcs2) {
t.Errorf("stopped at %X; expected one of %X.", status.PC, pcs2)
}
// Check we get the expected results calling VarByName then Value
// for the variables in expectedVarValues.
for name, exp := range expectedVarValues {
if v, err := prog.VarByName(name); err != nil {
t.Errorf("VarByName(%s): %s", name, err)
} else if val, err := prog.Value(v); err != nil {
t.Errorf("value of %s: %s", name, err)
} else if val != exp {
t.Errorf("value of %s: got %T(%v) want %T(%v)", name, val, val, exp, exp)
}
}
// Check some error cases for VarByName and Value.
if _, err = prog.VarByName("not a real name"); err == nil {
t.Error("VarByName for invalid name: expected error")
}
if _, err = prog.Value(debug.Var{}); err == nil {
t.Error("value of invalid var: expected error")
}
if v, err := prog.VarByName("main.Z_int16"); err != nil {
t.Error("VarByName(main.Z_int16) error:", err)
} else {
v.Address = 0
// v now has a valid type but a bad address.
_, err = prog.Value(v)
if err == nil {
t.Error("value of invalid location: expected error")
}
}
// checkValue tests that we can get a Var for a variable with the given name,
// that we can then get the value of that Var, and that calling fn for that
// value succeeds.
checkValue := func(name string, fn func(val debug.Value) error) {
if v, err := prog.VarByName(name); err != nil {
t.Errorf("VarByName(%s): %s", name, err)
} else if val, err := prog.Value(v); err != nil {
t.Errorf("value of %s: %s", name, err)
} else if err := fn(val); err != nil {
t.Errorf("value of %s: %s", name, err)
}
}
checkValue("main.Z_uintptr", func(val debug.Value) error {
if val != uint32(21) && val != uint64(21) {
// Z_uintptr should be an unsigned integer with size equal to the debugged
// program's address size.
return fmt.Errorf("got %T(%v) want 21", val, val)
}
return nil
})
checkValue("main.Z_int", func(val debug.Value) error {
if val != int32(-21) && val != int64(-21) {
return fmt.Errorf("got %T(%v) want -21", val, val)
}
return nil
})
checkValue("main.Z_uint", func(val debug.Value) error {
if val != uint32(21) && val != uint64(21) {
return fmt.Errorf("got %T(%v) want 21", val, val)
}
return nil
})
checkValue("main.Z_pointer", func(val debug.Value) error {
if _, ok := val.(debug.Pointer); !ok {
return fmt.Errorf("got %T(%v) expected Pointer", val, val)
}
return nil
})
checkValue("main.Z_pointer_nil", func(val debug.Value) error {
if p, ok := val.(debug.Pointer); !ok {
return fmt.Errorf("got %T(%v) expected Pointer", val, val)
} else if p.Address != 0 {
return fmt.Errorf("got %T(%v) expected nil pointer", val, val)
}
return nil
})
checkValue("main.Z_array", func(val debug.Value) error {
a, ok := val.(debug.Array)
if !ok {
return fmt.Errorf("got %T(%v) expected Array", val, val)
}
if a.Len() != 5 {
return fmt.Errorf("got array length %d expected 5", a.Len())
}
expected := [5]int8{-121, 121, 3, 2, 1}
for i := uint64(0); i < 5; i++ {
if v, err := prog.Value(a.Element(i)); err != nil {
return fmt.Errorf("reading element %d: %s", i, err)
} else if v != expected[i] {
return fmt.Errorf("element %d: got %T(%v) want %T(%d)", i, v, v, expected[i], expected[i])
}
}
return nil
})
checkValue("main.Z_slice", func(val debug.Value) error {
s, ok := val.(debug.Slice)
if !ok {
return fmt.Errorf("got %T(%v) expected Slice", val, val)
}
if s.Len() != 5 {
return fmt.Errorf("got slice length %d expected 5", s.Len())
}
expected := []uint8{115, 108, 105, 99, 101}
for i := uint64(0); i < 5; i++ {
if v, err := prog.Value(s.Element(i)); err != nil {
return fmt.Errorf("reading element %d: %s", i, err)
} else if v != expected[i] {
return fmt.Errorf("element %d: got %T(%v) want %T(%d)", i, v, v, expected[i], expected[i])
}
}
return nil
})
checkValue("main.Z_map_empty", func(val debug.Value) error {
m, ok := val.(debug.Map)
if !ok {
return fmt.Errorf("got %T(%v) expected Map", val, val)
}
if m.Length != 0 {
return fmt.Errorf("got map length %d expected 0", m.Length)
}
return nil
})
checkValue("main.Z_map_nil", func(val debug.Value) error {
m, ok := val.(debug.Map)
if !ok {
return fmt.Errorf("got %T(%v) expected Map", val, val)
}
if m.Length != 0 {
return fmt.Errorf("got map length %d expected 0", m.Length)
}
return nil
})
checkValue("main.Z_map_3", func(val debug.Value) error {
m, ok := val.(debug.Map)
if !ok {
return fmt.Errorf("got %T(%v) expected Map", val, val)
}
if m.Length != 2 {
return fmt.Errorf("got map length %d expected 2", m.Length)
}
keyVar0, valVar0, err := prog.MapElement(m, 0)
if err != nil {
return err
}
keyVar1, valVar1, err := prog.MapElement(m, 1)
if err != nil {
return err
}
key0, err := prog.Value(keyVar0)
if err != nil {
return err
}
key1, err := prog.Value(keyVar1)
if err != nil {
return err
}
val0, err := prog.Value(valVar0)
if err != nil {
return err
}
val1, err := prog.Value(valVar1)
if err != nil {
return err
}
// The map should contain 1024,1 and 512,-1 in some order.
ok1 := key0 == int16(1024) && val0 == int8(1) && key1 == int16(512) && val1 == int8(-1)
ok2 := key1 == int16(1024) && val1 == int8(1) && key0 == int16(512) && val0 == int8(-1)
if !ok1 && !ok2 {
return fmt.Errorf("got values (%d,%d) and (%d,%d), expected (1024,1) and (512,-1) in some order", key0, val0, key1, val1)
}
_, _, err = prog.MapElement(m, 2)
if err == nil {
return fmt.Errorf("MapElement: reading at a bad index succeeded, expected error")
}
return nil
})
checkValue("main.Z_string", func(val debug.Value) error {
s, ok := val.(debug.String)
if !ok {
return fmt.Errorf("got %T(%v) expected String", val, val)
}
if s.Length != 12 {
return fmt.Errorf("got string length %d expected 12", s.Length)
}
expected := "I'm a string"
if s.String != expected {
return fmt.Errorf("got %s expected %s", s.String, expected)
}
return nil
})
checkValue("main.Z_channel", func(val debug.Value) error {
c, ok := val.(debug.Channel)
if !ok {
return fmt.Errorf("got %T(%v) expected Channel", val, val)
}
if c.Buffer == 0 {
return fmt.Errorf("got buffer address %d expected nonzero", c.Buffer)
}
if c.Length != 0 {
return fmt.Errorf("got length %d expected 0", c.Length)
}
if c.Capacity != 0 {
return fmt.Errorf("got capacity %d expected 0", c.Capacity)
}
return nil
})
checkValue("main.Z_channel_2", func(val debug.Value) error {
c, ok := val.(debug.Channel)
if !ok {
return fmt.Errorf("got %T(%v) expected Channel", val, val)
}
if c.Buffer == 0 {
return fmt.Errorf("got buffer address %d expected nonzero", c.Buffer)
}
if c.Length != 0 {
return fmt.Errorf("got length %d expected 0", c.Length)
}
if c.Capacity != 0 {
return fmt.Errorf("got capacity %d expected 0", c.Capacity)