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Improve array evaluation support

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* First of a few commits to allow for evaluating arrays of arbitrary
  types
* Adds support for 32 bit integer arrays
This commit is contained in:
Derek Parker
2014-12-28 22:37:18 -06:00
parent 9e8ac82104
commit 623ec5e53d
3 changed files with 16 additions and 17 deletions
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3
_fixtures/testvariables.go
View File

@ -24,10 +24,11 @@ func foobar(baz string) {
neg = -1
i8 = int8(1)
f32 = float32(1.2)
i32 = [2]int32{1, 2}
)
barfoo()
fmt.Println(a1, a2, a3, a4, a5, a6, a7, baz, neg, i8, f32)
fmt.Println(a1, a2, a3, a4, a5, a6, a7, baz, neg, i8, f32, i32)
}
func main() {

27
proctl/variables.go
View File

@ -559,27 +559,24 @@ func (thread *ThreadContext) readIntSlice(addr uintptr) (string, error) {
}
func (thread *ThreadContext) readIntArray(addr uintptr, t *dwarf.ArrayType) (string, error) {
var (
number uint64
members = make([]uint64, 0, t.ByteSize)
)
val, err := thread.readMemory(addr, uintptr(t.ByteSize))
if err != nil {
return "", err
}
buf := bytes.NewBuffer(val)
for {
err := binary.Read(buf, binary.LittleEndian, &number)
if err != nil {
break
switch t.Type.Size() {
case 4:
members := *(*[]uint32)(unsafe.Pointer(&val))
lptr := (*int)(unsafe.Pointer(uintptr(unsafe.Pointer(&members)) + ptrsize))
*lptr = int(t.Count)
return fmt.Sprintf("[%d]int32 %d", t.Count, members), nil
case 8:
members := *(*[]uint64)(unsafe.Pointer(&val))
lptr := (*int)(unsafe.Pointer(uintptr(unsafe.Pointer(&members)) + ptrsize))
*lptr = int(t.Count)
return fmt.Sprintf("[%d]int %d", t.Count, members), nil
}
members = append(members, number)
}
return fmt.Sprintf("[%d]int %d", t.ByteSize/int64(ptrsize), members), nil
return "", fmt.Errorf("Could not read array")
}
func (thread *ThreadContext) readInt(addr uintptr, size int64) (string, error) {

3
proctl/variables_test.go
View File

@ -30,10 +30,11 @@ func TestVariableEvaluation(t *testing.T) {
{"i8", "1", "int8"},
{"f32", "1.2", "float32"},
{"a6.Baz", "8", "int"},
{"i32", "[2]int32 [1 2]", "[2]int32"},
}
withTestProcess(executablePath, t, func(p *DebuggedProcess) {
pc, _, _ := p.GoSymTable.LineToPC(fp, 29)
pc, _, _ := p.GoSymTable.LineToPC(fp, 30)
_, err := p.Break(uintptr(pc))
assertNoError(err, t, "Break() returned an error")