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Dynamic teal #2126

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merged 19 commits into from
May 14, 2021
Merged

Dynamic teal #2126

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b4a55af
basics for divw, teal v4
jannotti Mar 15, 2021
1b98e69
Docs and tests for divw
jannotti Mar 19, 2021
cdd1a59
back branches
jannotti Apr 27, 2021
c6ddaa1
Allow labels to proceed instructions on a line
jannotti Apr 27, 2021
2d8e221
callsub, retsub
jannotti Apr 27, 2021
736be24
code review suggestions
jannotti May 6, 2021
8b8aba2
callsub arg correction, infinite recursion test
jannotti May 6, 2021
fbc896b
check back branches for alignment
jannotti May 6, 2021
a7346a3
make dry run test closer to reality
jannotti May 7, 2021
60ce9ee
Move cost checking into Check() for static cost checks.
jannotti May 10, 2021
ca53930
ignore langspec files. we might consdier checkin instead
jannotti May 10, 2021
0430d1c
test that v4 teal is not available early
jannotti May 11, 2021
4137ada
check programs against last static version
jannotti May 11, 2021
1802d7b
mistaken checkin of commented test, removed
jannotti May 11, 2021
f8e281d
Use TEAL v4, rather than new consenus parameter to go dynamic.
jannotti May 11, 2021
838d411
Spec updates for backjumps
jannotti May 11, 2021
511cf69
typo
jannotti May 11, 2021
12d90f8
Further explanation of callstack
jannotti May 14, 2021
acbc483
code review
jannotti May 14, 2021
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@jannotti
jannotti committed Apr 27, 2021
commit cdd1a592add1dc9ffddb2f09c96138a1f496e056
50 changes: 20 additions & 30 deletions data/transactions/logic/assembler.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1148,8 +1148,8 @@ func (ops *OpStream) resolveLabels() {
}
// all branch instructions (currently) are opcode byte and 2 offset bytes, and the destination is relative to the next pc as if the branch was a no-op
naturalPc := lr.position + 3
if dest < naturalPc {
ops.errorf("label %v is before reference but only forward jumps are allowed", lr.label)
if ops.Version < backBranchEnabledVersion && dest < naturalPc {
ops.errorf("label %v is a back reference, back jump support was introduced in TEAL v4", lr.label)
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continue
}
jump := dest - naturalPc
Expand Down Expand Up @@ -1376,33 +1376,29 @@ func parseIntcblock(program []byte, pc int) (intc []uint64, nextpc int, err erro
return
}

func checkIntConstBlock(cx *evalContext) int {
func checkIntConstBlock(cx *evalContext) error {
pos := cx.pc + 1
numInts, bytesUsed := binary.Uvarint(cx.program[pos:])
if bytesUsed <= 0 {
cx.err = fmt.Errorf("could not decode int const block size at pc=%d", pos)
return 1
return fmt.Errorf("could not decode int const block size at pc=%d", pos)
}
pos += bytesUsed
if numInts > uint64(len(cx.program)) {
cx.err = errTooManyIntc
return 0
return errTooManyIntc
}
//intc = make([]uint64, numInts)
for i := uint64(0); i < numInts; i++ {
if pos >= len(cx.program) {
cx.err = errShortIntcblock
return 0
return errShortIntcblock
}
_, bytesUsed = binary.Uvarint(cx.program[pos:])
if bytesUsed <= 0 {
cx.err = fmt.Errorf("could not decode int const[%d] at pc=%d", i, pos)
return 1
return fmt.Errorf("could not decode int const[%d] at pc=%d", i, pos)
}
pos += bytesUsed
}
cx.nextpc = pos
return 1
return nil
}

var errShortBytecblock = errors.New("bytecblock ran past end of program")
Expand Down Expand Up @@ -1448,44 +1444,38 @@ func parseBytecBlock(program []byte, pc int) (bytec [][]byte, nextpc int, err er
return
}

func checkByteConstBlock(cx *evalContext) int {
func checkByteConstBlock(cx *evalContext) error {
pos := cx.pc + 1
numItems, bytesUsed := binary.Uvarint(cx.program[pos:])
if bytesUsed <= 0 {
cx.err = fmt.Errorf("could not decode []byte const block size at pc=%d", pos)
return 1
return fmt.Errorf("could not decode []byte const block size at pc=%d", pos)
}
pos += bytesUsed
if numItems > uint64(len(cx.program)) {
cx.err = errTooManyItems
return 0
return errTooManyItems
}
//bytec = make([][]byte, numItems)
for i := uint64(0); i < numItems; i++ {
if pos >= len(cx.program) {
cx.err = errShortBytecblock
return 0
return errShortBytecblock
}
itemLen, bytesUsed := binary.Uvarint(cx.program[pos:])
if bytesUsed <= 0 {
cx.err = fmt.Errorf("could not decode []byte const[%d] at pc=%d", i, pos)
return 1
return fmt.Errorf("could not decode []byte const[%d] at pc=%d", i, pos)
}
pos += bytesUsed
if pos >= len(cx.program) {
cx.err = errShortBytecblock
return 0
return errShortBytecblock
}
end := uint64(pos) + itemLen
if end > uint64(len(cx.program)) || end < uint64(pos) {
cx.err = errShortBytecblock
return 0
return errShortBytecblock
}
//bytec[i] = program[pos : pos+int(itemLen)]
pos += int(itemLen)
}
cx.nextpc = pos
return 1
return nil
}

func disIntcblock(dis *disassembleState, spec *OpSpec) (string, error) {
Expand Down Expand Up @@ -1612,9 +1602,9 @@ func disPushInt(dis *disassembleState, spec *OpSpec) (string, error) {
dis.nextpc = pos + bytesUsed
return fmt.Sprintf("%s %d", spec.Name, val), nil
}
func checkPushInt(cx *evalContext) int {
func checkPushInt(cx *evalContext) error {
opPushInt(cx)
return 1
return cx.err
}

func disPushBytes(dis *disassembleState, spec *OpSpec) (string, error) {
Expand All @@ -1632,9 +1622,9 @@ func disPushBytes(dis *disassembleState, spec *OpSpec) (string, error) {
dis.nextpc = int(end)
return fmt.Sprintf("%s 0x%s", spec.Name, hex.EncodeToString(bytes)), nil
}
func checkPushBytes(cx *evalContext) int {
func checkPushBytes(cx *evalContext) error {
opPushBytes(cx)
return 1
return cx.err
Comment on lines -1635 to +1634
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it looks like check* functions needs to be moved to check.go from the assembler

}

// This is also used to disassemble gtxns
Expand Down
13 changes: 9 additions & 4 deletions data/transactions/logic/assembler_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -771,9 +771,14 @@ func TestAssembleRejectNegJump(t *testing.T) {
int 1
bnz wat
int 2`
for v := uint64(1); v <= AssemblerMaxVersion; v++ {
for v := uint64(1); v < backBranchEnabledVersion; v++ {
t.Run(fmt.Sprintf("v=%d", v), func(t *testing.T) {
testProg(t, source, v, expect{3, "label wat is before reference but only forward jumps are allowed"})
testProg(t, source, v, expect{3, "label wat is a back reference..."})
})
}
for v := uint64(backBranchEnabledVersion); v <= AssemblerMaxVersion; v++ {
t.Run(fmt.Sprintf("v=%d", v), func(t *testing.T) {
testProg(t, source, v)
})
}
}
Expand Down Expand Up @@ -1641,8 +1646,8 @@ func TestErrShortBytecblock(t *testing.T) {

var cx evalContext
cx.program = ops.Program
checkIntConstBlock(&cx)
require.Equal(t, cx.err, errShortIntcblock)
err = checkIntConstBlock(&cx)
require.Equal(t, err, errShortIntcblock)
}

func TestBranchAssemblyTypeCheck(t *testing.T) {
Expand Down
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