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Implement exception guards and serialization/deserialization

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This commit is contained in:
Konstantin Nazarov 2024-10-01 20:30:06 +01:00
parent 2e3032ad26
commit be4224a22b
Signed by: knazarov
GPG key ID: 4CFE0A42FA409C22
19 changed files with 940 additions and 89 deletions
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4
CMakeLists.txt
View file

@ -23,6 +23,7 @@ target_sources(vm_lib
src/fio.cpp
src/stdlib.cpp
src/lineedit.cpp
src/serialize.cpp
PUBLIC
FILE_SET HEADERS
@ -43,6 +44,7 @@ target_sources(vm_lib
src/fio.hpp
src/stdlib.hpp
src/lineedit.hpp
src/serialize.hpp
)
add_executable(valeri src/valeri.cpp)
@ -67,6 +69,8 @@ set(LISP_TESTS
dict
function
collections
continuations
serialize
)

1
src/arena.cpp
View file

@ -265,6 +265,7 @@ Result<PodObject*> Arena::gc_stack(PodStackFrame* obj) {
nobj->header.tag = Tag::StackFrame;
nobj->parent = TRY(gc_pod(obj->parent.get()));
nobj->fun = TRY(gc_pod(obj->fun.get()));
nobj->guard = obj->guard;
nobj->pc = obj->pc;
nobj->size = obj->size;
for (uint64_t i = 0; i < obj->size; i++) {

33
src/arena.hpp
View file

@ -16,6 +16,10 @@ class GcRootList;
Arena& get_arena();
void set_arena(Arena& arena);
static uint64_t round_up(uint64_t number, uint64_t to) {
return ((number + to - 1) / to) * to;
}
class GcRootBase {
public:
friend class Arena;
@ -131,11 +135,29 @@ class Arena {
uint64_t objsize = sizeof(T) + extra;
auto ptr = _first->alloc(objsize);
if (ptr.has_value()) return (T*)ptr.value();
if (ptr.has_value()) {
new (ptr.value()) T();
return (T*)ptr.value();
}
// TODO: trigger GC
TRY(gc());
return (T*)TRY(_first->alloc(objsize));
T* res = (T*)TRY(_first->alloc(objsize));
new (res) T();
return res;
}
template <class T>
Result<T*> alloc_bytes(uint64_t size = 0) {
auto ptr = _first->alloc(size);
if (ptr.has_value()) {
return (T*)ptr.value();
}
TRY(gc());
return (T*)TRY(_first->alloc(size));
}
Result<void> gc();
@ -205,6 +227,11 @@ Result<T*> arena_alloc(uint64_t extra = 0) {
return get_arena().alloc<T>(extra);
}
template <class T>
Result<T*> arena_alloc_bytes(uint64_t size = 0) {
return get_arena().alloc_bytes<T>(size);
}
Result<void> arena_gc();
template <class T>

238
src/common.cpp
View file

@ -61,7 +61,6 @@ Result<Symbol> Symbol::create(String& rhs) {
uint64_t res_size = rhs_size;
auto pod = TRY(arena_alloc<PodSymbol>(res_size * sizeof(char32_t)));
pod->header.tag = Tag::Symbol;
pod->size = res_size;
memcpy(pod->data, rhs._value->data, sizeof(char32_t) * rhs_size);
@ -73,7 +72,6 @@ Result<String> String::create(const Symbol& rhs) {
uint64_t res_size = rhs_size;
auto pod = TRY(arena_alloc<PodString>(res_size * sizeof(char32_t)));
pod->header.tag = Tag::String;
pod->size = res_size;
memcpy(pod->data, rhs._value->data, sizeof(char32_t) * rhs_size);
@ -87,7 +85,6 @@ Result<ByteArray> ByteArray::create(const String& str) {
size += utf8_codepoint_size(TRY(str[i]));
}
auto pod = TRY(arena_alloc<PodByteArray>(size * sizeof(char)));
pod->header.tag = Tag::ByteArray;
pod->size = size;
char* res = pod->data;
@ -100,9 +97,106 @@ Result<ByteArray> ByteArray::create(const String& str) {
return ByteArray(TRY(MkGcRoot(pod)));
}
Result<String> ByteArray::hex() const {
auto size = _value->size * 2;
auto pod = TRY(arena_alloc<PodString>(size * sizeof(char32_t)));
pod->size = size;
const char* hexa = "0123456789ABCDEF";
for (uint64_t i = 0; i < _value->size; i++) {
auto b = (uint8_t)_value->data[i];
pod->data[i * 2] = hexa[(b >> 4) & 0xF];
pod->data[i * 2 + 1] = hexa[b & 0xF];
}
return String(TRY(MkGcRoot(pod)));
}
Result<ByteArray> ByteArray::to_rle() const {
auto size = _value->size;
auto compressed_size = 0;
for (uint64_t i = 0; i < size; ++i) {
auto b = _value->data[i];
if (b == 0) {
uint64_t rl = 0;
for (uint64_t j = 0; j < 255 && i + j < size && _value->data[i + j] == 0;
j++) {
rl++;
}
i += rl - 1;
compressed_size += 2;
} else {
++compressed_size;
}
}
auto pod = TRY(arena_alloc<PodByteArray>(compressed_size));
pod->size = compressed_size;
auto pos = 0;
for (uint64_t i = 0; i < size; ++i) {
auto b = _value->data[i];
if (b == 0) {
uint64_t rl = 0;
for (uint64_t j = 0; j < 255 && i + j < size && _value->data[i + j] == 0;
j++) {
rl++;
}
i += rl - 1;
pod->data[pos] = 0;
pod->data[pos + 1] = rl;
pos += 2;
} else {
pod->data[pos] = _value->data[i];
++pos;
}
}
return ByteArray(TRY(MkGcRoot(pod)));
}
Result<ByteArray> ByteArray::from_rle() const {
uint64_t size = _value->size;
uint64_t decompressed_size = 0;
for (uint64_t i = 0; i < size; ++i) {
auto b = _value->data[i];
if (b == 0) {
if (i + 1 >= size) {
return ERROR(KeyError);
}
decompressed_size += _value->data[i + 1];
i += 1;
} else {
++decompressed_size;
}
}
auto pod = TRY(arena_alloc<PodByteArray>(decompressed_size));
pod->size = decompressed_size;
uint64_t pos = 0;
for (uint64_t i = 0; i < size; ++i) {
auto b = _value->data[i];
if (b == 0) {
uint64_t run_size = _value->data[i + 1];
for (uint64_t j = 0; j < run_size; j++) {
pod->data[pos + j] = 0;
}
i += 1;
pos += run_size;
} else {
pod->data[pos] = _value->data[i];
++pos;
}
}
return ByteArray(TRY(MkGcRoot(pod)));
}
Result<SrcLoc> SrcLoc::create(const SourceRange& sourcerange) {
auto pod = TRY(arena_alloc<PodSrcLoc>());
pod->header.tag = Tag::SrcLoc;
pod->sourcerange = sourcerange;
return SrcLoc(TRY(MkGcRoot(pod)));
@ -134,7 +228,6 @@ Result<short> SrcLoc::cmp(const SrcLoc& rhs) const {
Result<Syntax> Syntax::create(const String& filename, const SrcLoc& srcloc,
const Value& expression) {
auto pod = TRY(arena_alloc<PodSyntax>());
pod->header.tag = Tag::Syntax;
pod->filename = filename.pod();
pod->srcloc = srcloc.pod();
pod->expression = expression.pod();
@ -342,12 +435,13 @@ Result<short> Module::cmp(const Module& rhs) const {
return res;
}
Result<StackFrame> StackFrame::create(const Value& parent, const Value& fun) {
Result<StackFrame> StackFrame::create(const Value& parent, const Value& fun,
bool guard) {
auto pod = TRY(arena_alloc<PodStackFrame>());
pod->header.tag = Tag::StackFrame;
pod->parent = parent.pod();
pod->fun = fun.pod();
pod->guard = guard;
pod->pc = 0;
pod->size = 0;
@ -371,11 +465,11 @@ Result<Value> StackFrame::get(uint64_t idx) const {
Result<StackFrame> StackFrame::set(uint64_t idx, const Value& val) const {
uint64_t size = std::max(_value->size, idx + 1);
auto pod = TRY(arena_alloc<PodStackFrame>(sizeof(OffPtr<PodObject>) * size));
pod->header.tag = Tag::StackFrame;
pod->parent = _value->parent;
pod->fun = _value->fun;
pod->pc = _value->pc;
pod->guard = _value->guard;
pod->size = size;
for (uint64_t i = 0; i < _value->size; i++) {
@ -394,10 +488,10 @@ Result<StackFrame> StackFrame::set(uint64_t idx, const Value& val) const {
Result<StackFrame> StackFrame::settop(uint64_t idx) const {
auto pod = TRY(arena_alloc<PodStackFrame>(sizeof(OffPtr<PodObject>) * idx));
pod->header.tag = Tag::StackFrame;
pod->parent = _value->parent;
pod->fun = _value->fun;
pod->guard = _value->guard;
pod->pc = _value->pc;
pod->size = idx;
@ -427,10 +521,10 @@ uint64_t StackFrame::pc() const { return _value->pc; }
Result<StackFrame> StackFrame::setpc(uint64_t pc) {
auto pod =
TRY(arena_alloc<PodStackFrame>(sizeof(OffPtr<PodObject>) * _value->size));
pod->header.tag = Tag::StackFrame;
pod->parent = _value->parent;
pod->fun = _value->fun;
pod->guard = _value->guard;
pod->pc = pc;
pod->size = _value->size;
@ -476,6 +570,105 @@ Result<StackFrame> StackFrame::ret(uint64_t regnum) const {
return std::move(parent_stack);
}
Result<StackFrame> StackFrame::detach(uint64_t depth) const {
if (depth == 0) {
uint64_t size = _value->size;
auto pod =
TRY(arena_alloc<PodStackFrame>(sizeof(OffPtr<PodObject>) * size));
pod->parent = TRY(Nil::create()).pod();
pod->fun = _value->fun;
pod->guard = _value->guard;
pod->pc = _value->pc;
pod->size = size;
for (uint64_t i = 0; i < _value->size; i++) {
pod->data[i] = _value->data[i];
}
return StackFrame(TRY(MkGcRoot(pod)));
}
auto par = TRY(parent());
if (par.is<Nil>()) return ERROR(KeyError);
StackFrame& par_frame = *par.to<StackFrame>();
auto par_frame_new = TRY(par_frame.detach(depth - 1));
uint64_t size = _value->size;
auto pod = TRY(arena_alloc<PodStackFrame>(sizeof(OffPtr<PodObject>) * size));
pod->parent = par_frame_new.pod();
pod->fun = _value->fun;
pod->guard = _value->guard;
pod->pc = _value->pc;
pod->size = size;
for (uint64_t i = 0; i < _value->size; i++) {
pod->data[i] = _value->data[i];
}
return StackFrame(TRY(MkGcRoot(pod)));
}
Result<StackFrame> StackFrame::attach(const StackFrame& frame) const {
auto par = TRY(parent());
if (par.is<Nil>()) {
uint64_t size = _value->size;
auto pod =
TRY(arena_alloc<PodStackFrame>(sizeof(OffPtr<PodObject>) * size));
pod->parent = frame.pod();
pod->fun = _value->fun;
pod->guard = _value->guard;
pod->pc = _value->pc;
pod->size = size;
for (uint64_t i = 0; i < _value->size; i++) {
pod->data[i] = _value->data[i];
}
return StackFrame(TRY(MkGcRoot(pod)));
}
StackFrame& par_frame = *par.to<StackFrame>();
auto par_frame_new = TRY(par_frame.attach(frame));
uint64_t size = _value->size;
auto pod = TRY(arena_alloc<PodStackFrame>(sizeof(OffPtr<PodObject>) * size));
pod->parent = par_frame_new.pod();
pod->fun = _value->fun;
pod->guard = _value->guard;
pod->pc = _value->pc;
pod->size = size;
for (uint64_t i = 0; i < _value->size; i++) {
pod->data[i] = _value->data[i];
}
return StackFrame(TRY(MkGcRoot(pod)));
}
Result<StackFrame> StackFrame::set_guard(bool guard) const {
uint64_t size = _value->size;
auto pod = TRY(arena_alloc<PodStackFrame>(sizeof(OffPtr<PodObject>) * size));
pod->parent = _value->parent;
pod->fun = _value->fun;
pod->guard = guard;
pod->pc = _value->pc;
pod->size = size;
for (uint64_t i = 0; i < _value->size; i++) {
pod->data[i] = _value->data[i];
}
return StackFrame(TRY(MkGcRoot(pod)));
}
Result<String> StackFrame::backtrace(uint64_t indent) const {
String res = TRY(String::create(""));
@ -483,16 +676,15 @@ Result<String> StackFrame::backtrace(uint64_t indent) const {
while (true) {
Value par = TRY(cur.parent());
// If parent frame is empty - we are at the top-level. Top-level is always
// <unnamed>, so let's just skip it
if (par.is<Nil>()) break;
auto fun = TRY(cur.fun());
for (uint64_t i = 0; i < indent; i++) {
res = TRY(res.concat(" "));
}
if (cur.guard()) {
res = TRY(res.concat("guard"));
} else {
res = TRY(res.concat("Function "));
if (fun.is<Function>()) {
Function& f = *fun.to<Function>();
@ -508,9 +700,12 @@ Result<String> StackFrame::backtrace(uint64_t indent) const {
auto name = TRY(String::create(TRY(f.name())));
res = TRY(res.concat(name));
}
}
res = TRY(res.concat("\n"));
if (par.is<Nil>()) break;
cur = TRY(par.to<StackFrame>()->copy());
}
return res;
@ -541,7 +736,6 @@ Result<short> Error::cmp(const Error& rhs) const {
Result<Continuation> Continuation::create(const Value& value,
const StackFrame& frame) {
auto pod = TRY(arena_alloc<PodContinuation>());
pod->header.tag = Tag::Continuation;
pod->value = value.pod();
pod->frame = frame.pod();
@ -577,7 +771,6 @@ Result<short> Continuation::cmp(const Continuation& rhs) const {
Result<Task> Task::create(uint64_t task_id, const Array& params) {
auto pod = TRY(arena_alloc<PodTask>());
pod->header.tag = Tag::Task;
pod->task_id = task_id;
pod->params = params.pod();
@ -614,7 +807,6 @@ Result<short> Task::cmp(const Task& rhs) const {
Result<TaskResult> TaskResult::create(const Value& result, const Value& error) {
auto pod = TRY(arena_alloc<PodTaskResult>());
pod->header.tag = Tag::TaskResult;
pod->result = result.pod();
pod->error = error.pod();
@ -650,7 +842,6 @@ Result<short> TaskResult::cmp(const TaskResult& rhs) const {
Result<Pair> Pair::create(const Value& first, const Value& rest) {
auto pod = TRY(arena_alloc<PodPair>());
pod->header.tag = Tag::Pair;
pod->first = first.pod();
pod->rest = rest.pod();
@ -719,7 +910,6 @@ Result<Function> Function::create(const Value& name, uint64_t arity,
const Array& constants, const Array& code,
const Array& closure) {
auto pod = TRY(arena_alloc<PodFunction>());
pod->header.tag = Tag::Function;
pod->arity = arity;
pod->name = name.pod();
pod->constants = constants.pod();
@ -732,7 +922,6 @@ Result<Function> Function::create(const Value& name, uint64_t arity,
Result<Function> Function::create(const Function& prototype,
const Array& closure) {
auto pod = TRY(arena_alloc<PodFunction>());
pod->header.tag = Tag::Function;
pod->arity = prototype._value->arity;
pod->name = prototype._value->name;
pod->constants = prototype._value->constants;
@ -760,7 +949,6 @@ Result<Array> Function::closure() const {
Result<StdlibFunction> StdlibFunction::create(StdlibFunctionId fun_id) {
auto pod = TRY(arena_alloc<PodStdlibFunction>());
pod->header.tag = Tag::StdlibFunction;
pod->fun_id = (uint64_t)fun_id;
return StdlibFunction(TRY(MkGcRoot(pod)));
@ -778,7 +966,6 @@ StdlibFunctionId StdlibFunction::fun_id() const {
Result<Module> Module::create(const Value& name, const Function& fun) {
auto pod = TRY(arena_alloc<PodModule>());
pod->header.tag = Tag::Module;
pod->name = name.pod();
pod->fun = fun.pod();
@ -847,7 +1034,6 @@ Result<Array> Array::set(uint64_t idx, const Value& value) const {
if (idx >= res_size) return ERROR(IndexOutOfRange);
auto pod = TRY(arena_alloc<PodArray>(res_size * sizeof(OffPtr<PodObject>)));
pod->header.tag = Tag::Array;
pod->size = res_size;
for (uint64_t i = 0; i < res_size; i++) {
pod->data[i] = _value->data[i].get();
@ -872,7 +1058,6 @@ Result<Array> Array::append(const Value& rhs) const {
auto size = TRY(this->size());
auto pod = TRY(arena_alloc<PodArray>(res_size * sizeof(OffPtr<PodObject>)));
pod->header.tag = Tag::Array;
pod->size = res_size;
for (uint64_t i = 0; i < size; i++) {
pod->data[i] = _value->data[i].get();
@ -930,7 +1115,6 @@ Result<Dict> Dict::set(const Value& key, const Value& value) const {
}
auto pod = TRY(arena_alloc<PodDict>(2 * s * sizeof(OffPtr<PodObject>)));
pod->header.tag = Tag::Dict;
pod->size = s;
auto vpod = _value.get();
@ -1092,7 +1276,7 @@ Result<short> Dict::cmp(const Dict& rhs) const {
uint64_t i = 0;
uint64_t j = 0;
while (1) {
if (i == lsize && j == lsize) return 0;
if (i == lsize && j == rsize) return 0;
short cmp = short(i == lsize) - short(j == rsize);
if (cmp != 0) return cmp;
@ -1113,7 +1297,7 @@ Result<short> Array::cmp(const Array& rhs) const {
uint64_t i = 0;
uint64_t j = 0;
while (1) {
if (i == lsize && j == lsize) return 0;
if (i == lsize && j == rsize) return 0;
short cmp = short(i == lsize) - short(j == rsize);
if (cmp != 0) return cmp;

50
src/common.hpp
View file

@ -166,7 +166,6 @@ class Nil : public Object {
static Result<Nil> create() {
auto pod = TRY(arena_alloc<PodNil>());
pod->header.tag = Tag::Nil;
return Nil(TRY(MkGcRoot(pod)));
}
@ -209,7 +208,6 @@ class Array : public Object {
static Result<Array> create() {
auto pod = TRY(arena_alloc<PodArray>());
pod->header.tag = Tag::Array;
pod->size = 0;
@ -237,7 +235,6 @@ class Array : public Object {
uint64_t res_size = lhs_size + rhs_size;
auto pod = TRY(arena_alloc<PodArray>(res_size * sizeof(PodObject*)));
pod->header.tag = Tag::Array;
pod->size = res_size;
for (uint64_t i = 0; i < lhs_size; i++) {
pod->data[i] = _value->data[i].get();
@ -253,7 +250,6 @@ class Array : public Object {
if (start > end) return ERROR(IndexOutOfRange);
uint64_t res_size = end - start;
auto pod = TRY(arena_alloc<PodArray>(res_size * sizeof(PodObject*)));
pod->header.tag = Tag::Array;
pod->size = res_size;
for (uint64_t i = 0; i < end - start; i++) {
pod->data[i] = _value->data[start + i];
@ -293,7 +289,6 @@ class ByteArray : public Object {
}
static Result<ByteArray> create(char* chars, int64_t size) {
auto pod = TRY(arena_alloc<PodByteArray>(size * sizeof(char)));
pod->header.tag = Tag::ByteArray;
memcpy(pod->data, chars, size * sizeof(char32_t));
pod->size = size;
@ -304,7 +299,6 @@ class ByteArray : public Object {
static Result<ByteArray> create(const char* str) {
uint64_t size = strlen(str);
auto pod = TRY(arena_alloc<PodByteArray>(size * sizeof(char32_t)));
pod->header.tag = Tag::ByteArray;
memcpy(pod->data, str, size);
pod->size = size;
@ -331,7 +325,6 @@ class ByteArray : public Object {
uint64_t res_size = lhs_size + rhs_size;
auto pod = TRY(arena_alloc<PodByteArray>(res_size * sizeof(char)));
pod->header.tag = Tag::ByteArray;
pod->size = res_size;
memcpy(pod->data, _value->data, sizeof(char) * lhs_size);
memcpy(pod->data, rhs + lhs_size, sizeof(char) * rhs_size);
@ -344,10 +337,9 @@ class ByteArray : public Object {
uint64_t res_size = lhs_size + rhs_size;
auto pod = TRY(arena_alloc<PodByteArray>(res_size * sizeof(char)));
pod->header.tag = Tag::ByteArray;
pod->size = res_size;
memcpy(pod->data, _value->data, sizeof(char) * lhs_size);
memcpy(pod->data, rhs + lhs_size, sizeof(char) * rhs_size);
memcpy(pod->data + lhs_size, rhs, sizeof(char) * rhs_size);
return ByteArray(TRY(MkGcRoot(pod)));
}
@ -358,7 +350,6 @@ class ByteArray : public Object {
uint64_t res_size = lhs_size + rhs_size;
auto pod = TRY(arena_alloc<PodByteArray>(res_size * sizeof(char)));
pod->header.tag = Tag::ByteArray;
pod->size = res_size;
memcpy(pod->data, _value->data, sizeof(char) * lhs_size);
memcpy(pod->data + lhs_size, rhs._value->data, sizeof(char) * rhs_size);
@ -370,13 +361,16 @@ class ByteArray : public Object {
if (start > end) return ERROR(IndexOutOfRange);
uint64_t res_size = end - start;
auto pod = TRY(arena_alloc<PodByteArray>(res_size * sizeof(char)));
pod->header.tag = Tag::ByteArray;
pod->size = res_size;
memcpy(pod->data, _value->data + start, sizeof(char) * res_size);
return ByteArray(TRY(MkGcRoot(pod)));
}
Result<String> hex() const;
Result<ByteArray> to_rle() const;
Result<ByteArray> from_rle() const;
private:
GcRoot<PodByteArray> _value;
};
@ -410,7 +404,6 @@ class Dict : public Object {
static Result<Dict> create() {
auto pod = TRY(arena_alloc<PodDict>());
pod->header.tag = Tag::Dict;
pod->size = 0;
@ -476,7 +469,7 @@ class String : public Object {
uint64_t i = 0;
uint64_t j = 0;
while (1) {
if (i == lsize && j == lsize) return 0;
if (i == lsize && j == rsize) return 0;
short cmp = short(i == lsize) - short(j == rsize);
if (cmp != 0) return cmp;
@ -498,7 +491,6 @@ class String : public Object {
}
static Result<String> create(char32_t* chars, int64_t size) {
auto pod = TRY(arena_alloc<PodString>(size * sizeof(char32_t)));
pod->header.tag = Tag::String;
memcpy(pod->data, chars, size * sizeof(char32_t));
pod->size = size;
@ -510,7 +502,6 @@ class String : public Object {
auto size = TRY(bytes.size());
auto pod = TRY(arena_alloc<PodString>(size * sizeof(char32_t)));
pod->header.tag = Tag::String;
for (uint64_t i = 0; i < size; i++) pod->data[i] = TRY(bytes[i]);
pod->size = size;
@ -523,7 +514,6 @@ class String : public Object {
static Result<String> create(const char* str) {
uint64_t size = strlen(str);
auto pod = TRY(arena_alloc<PodString>(size * sizeof(char32_t)));
pod->header.tag = Tag::String;
for (uint64_t i = 0; i < size; i++) pod->data[i] = str[i];
pod->size = size;
@ -548,7 +538,6 @@ class String : public Object {
uint64_t res_size = lhs_size + rhs_size;
auto pod = TRY(arena_alloc<PodString>(res_size * sizeof(char32_t)));
pod->header.tag = Tag::String;
pod->size = res_size;
memcpy(pod->data, _value->data, sizeof(char32_t) * lhs_size);
for (uint64_t i = 0; i < rhs_size; i++) pod->data[lhs_size + i] = rhs[i];
@ -563,7 +552,6 @@ class String : public Object {
uint64_t res_size = lhs_size + rhs_size;
auto pod = TRY(arena_alloc<PodString>(res_size * sizeof(char32_t)));
pod->header.tag = Tag::String;
pod->size = res_size;
memcpy(pod->data, _value->data, sizeof(char32_t) * lhs_size);
for (uint64_t i = 0; i < rhs_size; i++) pod->data[lhs_size + i] = rhs[i];
@ -577,7 +565,6 @@ class String : public Object {
uint64_t res_size = lhs_size + rhs_size;
auto pod = TRY(arena_alloc<PodString>(res_size * sizeof(char32_t)));
pod->header.tag = Tag::String;
pod->size = res_size;
memcpy(pod->data, _value->data, sizeof(char32_t) * lhs_size);
memcpy(pod->data + lhs_size, rhs._value->data, sizeof(char32_t) * rhs_size);
@ -589,7 +576,6 @@ class String : public Object {
if (start > end) return ERROR(IndexOutOfRange);
uint64_t res_size = end - start;
auto pod = TRY(arena_alloc<PodString>(res_size * sizeof(char32_t)));
pod->header.tag = Tag::String;
pod->size = res_size;
memcpy(pod->data, _value->data + start, sizeof(char32_t) * res_size);
@ -620,7 +606,7 @@ class Symbol : public Object {
uint64_t i = 0;
uint64_t j = 0;
while (1) {
if (i == lsize && j == lsize) return 0;
if (i == lsize && j == rsize) return 0;
short cmp = short(i == lsize) - short(j == rsize);
if (cmp != 0) return cmp;
@ -662,7 +648,6 @@ class Symbol : public Object {
static Result<Symbol> create(char32_t* chars, int64_t size) {
auto pod = TRY(arena_alloc<PodSymbol>(size * sizeof(char32_t)));
pod->header.tag = Tag::Symbol;
memcpy(pod->data, chars, size * sizeof(char32_t));
@ -672,7 +657,6 @@ class Symbol : public Object {
static Result<Symbol> create(const char* str) {
uint64_t size = strlen(str);
auto pod = TRY(arena_alloc<PodSymbol>(size * sizeof(char32_t)));
pod->header.tag = Tag::Symbol;
for (uint64_t i = 0; i < size; i++) pod->data[i] = str[i];
pod->size = size;
@ -717,7 +701,6 @@ class SrcLoc : public Object {
static Result<SrcLoc> create(const SourcePosition& start,
const SourcePosition& end) {
auto pod = TRY(arena_alloc<PodSrcLoc>());
pod->header.tag = Tag::SrcLoc;
pod->sourcerange.start = start;
pod->sourcerange.end = end;
@ -849,9 +832,8 @@ class Int64 : public Object {
return Int64(TRY(MkGcRoot(obj)));
}
static Result<Int64> create(double val) {
static Result<Int64> create(int64_t val) {
auto pod = TRY(arena_alloc<PodInt64>());
pod->header.tag = Tag::Int64;
pod->value = val;
return Int64(TRY(MkGcRoot(pod)));
@ -908,7 +890,6 @@ class Float : public Object {
static Result<Float> create(double val) {
auto pod = TRY(arena_alloc<PodFloat>());
pod->header.tag = Tag::Float;
pod->value = val;
return Float(TRY(MkGcRoot(pod)));
@ -945,7 +926,6 @@ class Bool : public Object {
static Result<Bool> create(bool val) {
auto pod = TRY(arena_alloc<PodBool>());
pod->header.tag = Tag::Bool;
pod->value = val;
return Bool(TRY(MkGcRoot(pod)));
@ -983,7 +963,6 @@ class Opcode : public Object {
OpArg arg2 = {0, 0}, OpArg arg3 = {0, 0},
OpArg arg4 = {0, 0}) {
auto pod = TRY(arena_alloc<PodOpcode>());
pod->header.tag = Tag::Opcode;
pod->opcode = opcode;
pod->arg1 = arg1;
pod->arg2 = arg2;
@ -1164,13 +1143,13 @@ class StackFrame : public Object {
Result<StackFrame> incpc();
Result<uint64_t> size() const { return _value->size; }
static Result<StackFrame> create(const Value& parent, const Value& fun);
static Result<StackFrame> create(const Value& parent, const Value& fun,
bool guard = false);
Result<Array> slice(uint64_t start, uint64_t end) const {
if (start > end || end > _value->size) return ERROR(IndexOutOfRange);
uint64_t res_size = end - start;
auto pod = TRY(arena_alloc<PodArray>(res_size * sizeof(PodObject*)));
pod->header.tag = Tag::Array;
pod->size = res_size;
for (uint64_t i = 0; i < end - start; i++) {
pod->data[i] = _value->data[start + i];
@ -1182,9 +1161,16 @@ class StackFrame : public Object {
Result<StackFrame> call(const Value& fun, uint64_t start, uint64_t end) const;
Result<StackFrame> ret(uint64_t regno) const;
Result<StackFrame> detach(uint64_t depth) const;
Result<StackFrame> attach(const StackFrame& frame) const;
Result<StackFrame> set_guard(bool guard = true) const;
virtual Result<Value> copy_value() const final;
Result<StackFrame> copy() const;
bool guard() const { return _value->guard; }
Result<String> backtrace(uint64_t indent = 0) const;
private:
@ -1215,7 +1201,6 @@ class Error : public Object {
auto message_str = TRY(String::create(message));
auto pod = TRY(arena_alloc<PodError>());
pod->header.tag = Tag::Error;
pod->name = name_str.pod();
pod->message = message_str.pod();
@ -1225,7 +1210,6 @@ class Error : public Object {
static Result<Error> create(const Symbol& name, const String& message) {
auto pod = TRY(arena_alloc<PodError>());
pod->header.tag = Tag::Error;
pod->name = name.pod();
pod->message = message.pod();

53
src/error.cpp
View file

@ -19,9 +19,58 @@ void reseterrobj() { errobj = Value(); }
const char* errname(ErrorCode errcode) {
switch (errcode) {
case ErrorCode::Success:
return "success";
case ErrorCode::Unknown:
return "unknown";
case ErrorCode::OutOfMemory:
return "out-of-memory";
case ErrorCode::IndexOutOfRange:
return "index-out-of-range";
case ErrorCode::TypeMismatch:
return "type-mismatch";
case ErrorCode::ReadError:
return "read-error";
case ErrorCode::UnterminatedStringLiteral:
return "unterminalted-string-literal";
case ErrorCode::InvalidNumericLiteral:
return "invalid-numeric-literal";
case ErrorCode::NotImplemented:
return "not-implemented";
case ErrorCode::InvalidSymbol:
return "invalid-symbol";
case ErrorCode::MalformedList:
return "malformed-list";
case ErrorCode::KeyError:
return "key-error";
case ErrorCode::EndOfProgram:
return "end-of-program";
case ErrorCode::CompilationError:
return "compilation-error";
case ErrorCode::ArgumentCountMismatch:
return "argument-count-mismatch";
case ErrorCode::IOError:
return "io-error";
case ErrorCode::Interrupt:
return "interrupt";
case ErrorCode::AssertionFailed:
return "assertion-failed";
case ErrorCode::DivisionByZero:
return "division-by-zero";
case ErrorCode::SyntaxError:
return "syntax-error";
default:
return "unknown";
case ErrorCode::RuntimeError:
return "runtime-error";
case ErrorCode::Raise:
return "raise";
case ErrorCode::TaskFailed:
return "task-failed";
}
return "";
}
Result<Value> wrap_error(ErrorCode code) {
auto name = errname(code);
auto message = geterr();
return Value(TRY(Error::create(name, message)));
}

2
src/error.hpp
View file

@ -40,6 +40,8 @@ const Value& geterrobj(void);
Result<void> seterrobj(const Value&);
void reseterrobj();
Result<Value> wrap_error(ErrorCode code);
#define STRINGIZE_NESTED(A) #A
#define STRINGIZE(A) STRINGIZE_NESTED(A)

4
src/fio.cpp
View file

@ -63,7 +63,7 @@ Result<ByteArray> read_file(const char* filename) {
}
Result<ByteArray> read_file(const ByteArray& filename) {
auto filename_bytes = TRY(filename.concat("\0"));
auto filename_bytes = TRY(filename.concat("\0", 1));
FILE* fh = fopen(filename_bytes.raw_bytes(), "r");
if (!fh) {
@ -78,7 +78,7 @@ Result<ByteArray> read_file(const ByteArray& filename) {
Result<ByteArray> read_stdin() { return read_fh(stdin); }
Result<void> write_file(const ByteArray& filename, const ByteArray& contents) {
auto filename_bytes = TRY(filename.concat("\0"));
auto filename_bytes = TRY(filename.concat("\0", 1));
FILE* fh = fopen(filename_bytes.raw_bytes(), "w");
if (!fh) {

1
src/pod.hpp
View file

@ -201,6 +201,7 @@ class PodStackFrame final : public PodObject {
OffPtr<PodObject> parent;
OffPtr<PodObject> fun;
bool guard;
uint64_t pc;
uint64_t size;
OffPtr<PodObject> data[];

395
src/serialize.cpp Normal file
View file

@ -0,0 +1,395 @@
#include "serialize.hpp"
#include "arena.hpp"
#include "common.hpp"
#include "pod.hpp"
class Serializer {
public:
Serializer(uint8_t* buf, bool dryrun)
: buf(buf), _offset(0), dryrun(dryrun) {}
PodObject* serialize_nil(PodNil* obj) {
PodNil* res = (PodNil*)(buf + _offset);
if (!dryrun) {
memcpy(res, obj, sizeof(PodNil));
}
_offset += round_up(sizeof(PodNil), 8);
return res;
}
PodObject* serialize_bool(PodBool* obj) {
PodBool* res = (PodBool*)(buf + _offset);
if (!dryrun) {
memcpy(res, obj, sizeof(PodBool));
}
_offset += round_up(sizeof(PodBool), 8);
return res;
}
PodObject* serialize_int64(PodInt64* obj) {
PodInt64* res = (PodInt64*)(buf + _offset);
if (!dryrun) {
memcpy(res, obj, sizeof(PodInt64));
}
_offset += sizeof(PodInt64);
return res;
}
PodObject* serialize_float(PodFloat* obj) {
PodFloat* res = (PodFloat*)(buf + _offset);
if (!dryrun) {
memcpy(res, obj, sizeof(PodFloat));
}
_offset += round_up(sizeof(PodFloat), 8);
return res;
}
PodObject* serialize_string(PodString* obj) {
PodString* res = (PodString*)(buf + _offset);
uint64_t size = sizeof(PodString) + sizeof(char32_t) * obj->size;
if (!dryrun) {
memcpy(res, obj, size);
}
_offset += round_up(size, 8);
return res;
}
PodObject* serialize_symbol(PodSymbol* obj) {
PodSymbol* res = (PodSymbol*)(buf + _offset);
uint64_t size = sizeof(PodSymbol) + sizeof(char32_t) * obj->size;
if (!dryrun) {
memcpy(res, obj, size);
}
_offset += round_up(size, 8);
return res;
}
PodObject* serialize_srcloc(PodSrcLoc* obj) {
PodSrcLoc* res = (PodSrcLoc*)(buf + _offset);
uint64_t size = sizeof(PodSrcLoc);
if (!dryrun) {
memcpy(res, obj, size);
}
_offset += round_up(size, 8);
return res;
}
PodObject* serialize_syntax(PodSyntax* obj) {
PodSyntax* res = (PodSyntax*)(buf + _offset);
uint64_t size = sizeof(PodSyntax);
_offset += round_up(size, 8);
auto filename = serialize_object(obj->filename.get());
auto srcloc = serialize_object(obj->srcloc.get());
auto expression = serialize_object(obj->expression.get());
if (!dryrun) {
res->header.tag = Tag::Syntax;
res->filename = filename;
res->srcloc = srcloc;
res->expression = expression;
}
return res;
}
PodObject* serialize_pair(PodPair* obj) {
PodPair* res = (PodPair*)(buf + _offset);
uint64_t size = sizeof(PodPair);
_offset += round_up(size, 8);
auto first = serialize_object(obj->first.get());
auto rest = serialize_object(obj->rest.get());
if (!dryrun) {
res->header.tag = Tag::Pair;
res->first = first;
res->rest = rest;
}
return res;
}
PodObject* serialize_array(PodArray* obj) {
PodArray* res = (PodArray*)(buf + _offset);
uint64_t size = sizeof(PodArray) + sizeof(OffPtr<PodObject>) * obj->size;
_offset += round_up(size, 8);
if (!dryrun) {
res->header.tag = Tag::Array;
res->size = obj->size;
}
for (uint64_t i = 0; i < obj->size; ++i) {
auto val = serialize_object(obj->data[i].get());
if (!dryrun) {
res->data[i] = val;
}
}
return res;
}
PodObject* serialize_bytearray(PodByteArray* obj) {
PodByteArray* res = (PodByteArray*)(buf + _offset);
uint64_t size = sizeof(PodArray) + obj->size;
_offset += round_up(size, 8);
if (!dryrun) {
res->header.tag = Tag::ByteArray;
memcpy(res, obj, size);
}
return res;
}
PodObject* serialize_dict(PodDict* obj) {
PodDict* res = (PodDict*)(buf + _offset);
uint64_t size = sizeof(PodDict) + sizeof(OffPtr<PodObject>) * obj->size * 2;
_offset += round_up(size, 8);
if (!dryrun) {
res->header.tag = Tag::Dict;
res->size = obj->size;
}
for (uint64_t i = 0; i < obj->size * 2; ++i) {
auto val = serialize_object(obj->data[i].get());
if (!dryrun) {
res->data[i] = val;
}
}
return res;
}
PodObject* serialize_opcode(PodOpcode* obj) {
PodOpcode* res = (PodOpcode*)(buf + _offset);
uint64_t size = sizeof(PodOpcode);
_offset += round_up(size, 8);
if (!dryrun) {
memcpy(res, obj, size);
}
return res;
}
PodObject* serialize_function(PodFunction* obj) {
PodFunction* res = (PodFunction*)(buf + _offset);
uint64_t size = sizeof(PodFunction);
_offset += round_up(size, 8);
auto closure = serialize_object(obj->closure.get());
auto code = serialize_object(obj->code.get());
auto constants = serialize_object(obj->constants.get());
auto name = serialize_object(obj->name.get());
if (!dryrun) {
res->header.tag = Tag::Function;
res->arity = obj->arity;
res->closure = closure;
res->code = code;
res->constants = constants;
res->name = name;
}
return res;
}
PodObject* serialize_stdlib_function(PodStdlibFunction* obj) {
PodStdlibFunction* res = (PodStdlibFunction*)(buf + _offset);
uint64_t size = sizeof(PodStdlibFunction);
_offset += round_up(size, 8);
if (!dryrun) {
memcpy(res, obj, size);
}
return res;
}
PodObject* serialize_module(PodModule* obj) {
PodModule* res = (PodModule*)(buf + _offset);
uint64_t size = sizeof(PodModule);
_offset += round_up(size, 8);
auto fun = serialize_object(obj->fun.get());
auto name = serialize_object(obj->name.get());
if (!dryrun) {
res->header.tag = Tag::Module;
res->fun = fun;
res->name = name;
}
return res;
}
PodObject* serialize_stack(PodStackFrame* obj) {
PodStackFrame* res = (PodStackFrame*)(buf + _offset);
uint64_t size =
sizeof(PodStackFrame) + sizeof(OffPtr<PodObject>) * obj->size;
_offset += round_up(size, 8);
auto fun = serialize_object(obj->fun.get());
auto parent = serialize_object(obj->parent.get());
if (!dryrun) {
res->header.tag = Tag::StackFrame;
res->fun = fun;
res->parent = parent;
res->pc = obj->pc;
res->size = obj->size;
res->guard = obj->guard;
}
for (uint64_t i = 0; i < obj->size; i++) {
auto val = serialize_object(obj->data[i].get());
if (!dryrun) {
res->data[i] = val;
}
}
return res;
}
PodObject* serialize_error(PodError* obj) {
PodError* res = (PodError*)(buf + _offset);
uint64_t size = sizeof(PodError);
_offset += round_up(size, 8);
auto name = serialize_object(obj->name.get());
auto message = serialize_object(obj->message.get());
if (!dryrun) {
res->header.tag = Tag::Error;
res->name = name;
res->message = message;
}
return res;
}
PodObject* serialize_continuation(PodContinuation* obj) {
PodContinuation* res = (PodContinuation*)(buf + _offset);
uint64_t size = sizeof(PodContinuation);
_offset += round_up(size, 8);
auto frame = serialize_object(obj->frame.get());
auto value = serialize_object(obj->value.get());
if (!dryrun) {
res->header.tag = Tag::Continuation;
res->frame = frame;
res->value = value;
}
return res;
}
PodObject* serialize_task(PodTask* obj) {
PodTask* res = (PodTask*)(buf + _offset);
uint64_t size = sizeof(PodTask);
_offset += round_up(size, 8);
auto params = serialize_object(obj->params.get());
if (!dryrun) {
res->header.tag = Tag::Task;
res->task_id = obj->task_id;
res->params = params;
}
return res;
}
PodObject* serialize_task_result(PodTaskResult* obj) {
PodTaskResult* res = (PodTaskResult*)(buf + _offset);
uint64_t size = sizeof(PodTaskResult);
_offset += round_up(size, 8);
auto result = serialize_object(obj->result.get());
auto error = serialize_object(obj->error.get());
if (!dryrun) {
res->header.tag = Tag::TaskResult;
res->result = result;
res->error = error;
}
return res;
}
PodObject* serialize_object(PodObject* obj) {
switch (obj->header.tag) {
case Tag::Nil:
return serialize_nil((PodNil*)obj);
case Tag::Bool:
return serialize_bool((PodBool*)obj);
case Tag::Int64:
return serialize_int64((PodInt64*)obj);
case Tag::Float:
return serialize_float((PodFloat*)obj);
case Tag::String:
return serialize_string((PodString*)obj);
case Tag::Symbol:
return serialize_symbol((PodSymbol*)obj);
case Tag::SrcLoc:
return serialize_srcloc((PodSrcLoc*)obj);
case Tag::Syntax:
return serialize_syntax((PodSyntax*)obj);
case Tag::Pair:
return serialize_pair((PodPair*)obj);
case Tag::Array:
return serialize_array((PodArray*)obj);
case Tag::ByteArray:
return serialize_bytearray((PodByteArray*)obj);
case Tag::Dict:
return serialize_dict((PodDict*)obj);
case Tag::Opcode:
return serialize_opcode((PodOpcode*)obj);
case Tag::Function:
return serialize_function((PodFunction*)obj);
case Tag::StdlibFunction:
return serialize_stdlib_function((PodStdlibFunction*)obj);
case Tag::Module:
return serialize_module((PodModule*)obj);
case Tag::StackFrame:
return serialize_stack((PodStackFrame*)obj);
case Tag::Error:
return serialize_error((PodError*)obj);
case Tag::Continuation:
return serialize_continuation((PodContinuation*)obj);
case Tag::Task:
return serialize_task((PodTask*)obj);
case Tag::TaskResult:
return serialize_task_result((PodTaskResult*)obj);
};
// Should never reach here
return 0;
}
uint64_t offset() { return _offset; }
private:
uint8_t* buf;
uint64_t _offset;
bool dryrun;
};
Result<ByteArray> serialize(const Value& val) {
Serializer s(0, true);
s.serialize_object(val.pod());
auto size = s.offset();
auto pod = TRY(arena_alloc<PodByteArray>(size * sizeof(char)));
pod->size = size;
Serializer ss((uint8_t*)pod->data, false);
ss.serialize_object(val.pod());
auto ba = ByteArray(TRY(MkGcRoot(pod)));
ba = TRY(ba.to_rle());
return ba;
}
Result<Value> deserialize(const ByteArray& val) {
auto decompressed = TRY(val.from_rle());
auto size = TRY(decompressed.size());
PodObject* obj = TRY(arena_alloc_bytes<PodObject>(size));
memcpy(obj, decompressed.raw_bytes(), size);
return TRY(Value::create(obj));
}

9
src/serialize.hpp Normal file
View file

@ -0,0 +1,9 @@
#pragma once
template <class T>
class Result;
class Value;
class ByteArray;
Result<ByteArray> serialize(const Value& val);
Result<Value> deserialize(const ByteArray& val);

103
src/stdlib.cpp
View file

@ -4,6 +4,7 @@
#include "error.hpp"
#include "fio.hpp"
#include "pod.hpp"
#include "serialize.hpp"
#include "sourcerange.hpp"
#include "writer.hpp"
@ -391,7 +392,7 @@ Result<StackFrame> stdlib_raise(const StackFrame& stack) {
auto stack_size = TRY(stack.size());
if (stack_size > 1) {
return task_return(stack, 1);
return TRY(stack.ret(1));
}
auto params = TRY(stack.get(0));
@ -434,6 +435,103 @@ Result<StackFrame> stdlib_task(const StackFrame& stack) {
return res;
}
Result<StackFrame> stdlib_guard(const StackFrame& stack) {
auto stack_size = TRY(stack.size());
auto params = TRY(stack.get(0));
Array& params_array = *params.to<Array>();
auto size = TRY(params.size());
if (size != 2) return ERROR(ArgumentCountMismatch);
if (stack_size == 1) {
// This is the first entry to "guard", so need to establish
// context and call the guarded function
Value fun = TRY(params_array.get(0));
auto new_frame = TRY(stack.set_guard(true));
// Set stack[1] to "0", meaning that we've entered the guarded
// function
new_frame = TRY(new_frame.set(1, Value(TRY(Int64::create((int64_t)0)))));
new_frame = TRY(new_frame.set(2, fun));
return new_frame.call(fun, 2, 3);
}
auto state = TRY(stack.get(1));
if (!state.is<Int64>()) return ERROR(TypeMismatch);
auto state_int = state.to<Int64>()->value();
if (state_int == 0) {
// We've just normally returned from the guarded function. Just return
// its results back to the caller.
return stack.ret(2);
}
if (state_int == 1) {
// Exception has occured, and continuation is on the stack. We should
// now call the exception handler.
Value handler = TRY(params_array.get(1));
// Set stack[1] to "2", meaning that we've entered the guarded
// function
auto new_frame = TRY(stack.set(1, Value(TRY(Int64::create((int64_t)2)))));
auto cont = TRY(new_frame.get(2));
if (!cont.is<Continuation>()) return ERROR(TypeMismatch);
auto val = TRY(cont.to<Continuation>()->value());
new_frame = TRY(new_frame.set(2, handler));
new_frame = TRY(new_frame.set(3, val));
new_frame = TRY(new_frame.set(4, cont));
return new_frame.call(handler, 2, 5);
}
if (state_int == 2) {
// We've returned from the exception handler. Propagate its result to
// the caller.
return stack.ret(2);
}
return ERROR(NotImplemented);
}
Result<StackFrame> stdlib_serialize(const StackFrame& stack) {
auto stack_size = TRY(stack.size());
auto params = TRY(stack.get(0));
Array& params_array = *params.to<Array>();
auto size = TRY(params.size());
if (size != 1) return ERROR(ArgumentCountMismatch);
auto val = TRY(params.get(0));
auto serialized = Value(TRY(serialize(val)));
auto res = TRY(stack.set(0, serialized));
res = TRY(res.ret(0));
return res;
}
Result<StackFrame> stdlib_deserialize(const StackFrame& stack) {
auto stack_size = TRY(stack.size());
auto params = TRY(stack.get(0));
Array& params_array = *params.to<Array>();
auto size = TRY(params.size());
if (size != 1) return ERROR(ArgumentCountMismatch);
auto val = TRY(params.get(0));
if (!val.is<ByteArray>()) return ERROR(TypeMismatch);
auto deserialized = TRY(deserialize(*val.to<ByteArray>()));
auto res = TRY(stack.set(0, deserialized));
res = TRY(res.ret(0));
return res;
}
#define STDLIB_FUNCTION(name, id) \
[(uint64_t)StdlibFunctionId::id] = {#name, StdlibFunctionId::id, \
stdlib_##name}
@ -457,6 +555,9 @@ static StdlibFunctionEntry function_entries[] = {
STDLIB_FUNCTION(error, Error),
STDLIB_FUNCTION(raise, Raise),
STDLIB_FUNCTION(task, Task),
STDLIB_FUNCTION(guard, Guard),
STDLIB_FUNCTION(serialize, Serialize),
STDLIB_FUNCTION(deserialize, Deserialize),
[(uint64_t)StdlibFunctionId::Max] = {0, StdlibFunctionId::Max,
stdlib_unknown},
};

3
src/stdlib.hpp
View file

@ -23,6 +23,9 @@ enum class StdlibFunctionId : uint64_t {
Error,
Raise,
Task,
Guard,
Serialize,
Deserialize,
Max,
};

11
src/valeri.cpp
View file

@ -22,6 +22,16 @@ Result<void> print_error(const Result<Value>& res, const String& backtrace) {
auto message = TRY(errobj.to<Error>()->message());
print_string(*message.to<String>());
std::cout << "\n";
} else if (errobj.is<Continuation>()) {
auto val = TRY(errobj.to<Continuation>()->value());
if (val.is<Error>()) {
auto message = TRY(val.to<Error>()->message());
print_string(*message.to<String>());
std::cout << "\n";
} else {
std::cout << "Continuation: ";
debug_print(val);
}
} else {
std::cout << "Uncaught error: ";
debug_print(errobj);
@ -61,6 +71,7 @@ Result<Value> run_string(const String& fname, const String& src) {
if (maybe_res.has_error()) {
auto backtrace = TRY(vm.backtrace(2));
print_error(maybe_res, backtrace);
return maybe_res;
}
return maybe_res.release_value();

75
src/vm.cpp
View file

@ -124,6 +124,23 @@ Result<void> VM::vm_call_stdlib(Opcode& oc, StdlibFunction& fun) {
return Result<void>();
}
Result<void> VM::vm_call_cont(Opcode& oc, Continuation& fun) {
uint64_t reg_start = (uint64_t)oc.arg1().arg;
uint64_t reg_end = (uint64_t)oc.arg2().arg;
if (reg_end - reg_start != 2) return ERROR(ArgumentCountMismatch);
auto param = TRY(_stack.get(reg_start + 1));
_stack = TRY(_stack.settop(reg_start));
auto cont_stack = TRY(fun.frame());
_stack = TRY(_stack.incpc());
_stack = TRY(cont_stack.attach(_stack));
_stack = TRY(_stack.set(TRY(_stack.size()), param));
return Result<void>();
}
Result<void> VM::vm_call(Opcode& oc) {
Value fun_value = TRY(get(oc.arg1().is_const, oc.arg1().arg));
if (fun_value.is<Function>()) {
@ -136,6 +153,11 @@ Result<void> VM::vm_call(Opcode& oc) {
return vm_call_stdlib(oc, fun);
}
if (fun_value.is<Continuation>()) {
Continuation& fun = *fun_value.to<Continuation>();
return vm_call_cont(oc, fun);
}
return ERROR(TypeMismatch);
}
@ -280,18 +302,58 @@ Result<void> VM::step_bytecode() {
return Result<void>();
}
Result<Value> VM::unwind(const Continuation& cont) {
StackFrame cur = TRY(cont.frame());
uint64_t depth = 0;
while (true) {
if (cur.guard()) {
auto state = TRY(cur.get(1));
if (!state.is<Int64>()) return ERROR(TypeMismatch);
auto state_int = state.to<Int64>()->value();
if (state_int <= 1) {
auto val = TRY(cont.value());
auto cont_stack = TRY(cont.frame());
cont_stack = TRY(cont_stack.detach(depth - 1));
auto new_cont = TRY(Continuation::create(val, cont_stack));
cur = TRY(cur.set(1, Value(TRY(Int64::create((int64_t)1)))));
cur = TRY(cur.set(2, Value(std::move(new_cont))));
return Value(std::move(cur));
}
}
auto parent = TRY(cur.parent());
if (parent.is<Nil>()) break;
cur = TRY(parent.to<StackFrame>()->copy());
++depth;
}
return Value(TRY(Nil::create()));
}
Result<StackFrame> VM::handle_raise(const Continuation& cont) {
// TODO: this should do proper stack unwinding
auto unwind_res = TRY(unwind(cont));
if (!unwind_res.is<Nil>()) {
auto new_stack = TRY(unwind_res.to<StackFrame>()->copy());
return new_stack;
}
auto value = TRY(cont.value());
if (value.is<Error>()) {
if (!value.is<Task>()) {
auto obj = TRY(cont.copy_value());
return ERROR_OBJ(Raise, obj);
}
if (value.is<Task>()) {
Value tr;
if (value.is<Task>()) {
auto task_id = value.to<Task>()->task_id();
auto params = TRY(value.to<Task>()->params());
@ -301,7 +363,7 @@ Result<StackFrame> VM::handle_raise(const Continuation& cont) {
const auto& err = geterrobj();
Value errobj;
if (err.is<Nil>()) {
errobj = Value(TRY(Error::create("unknown-error", "Unknown error")));
errobj = TRY(wrap_error(res.error()));
} else {
errobj = TRY(err.copy());
}
@ -317,6 +379,7 @@ Result<StackFrame> VM::handle_raise(const Continuation& cont) {
auto new_frame = frame.set(TRY(frame.size()), tr);
return new_frame;
}
return ERROR(TypeMismatch);
}
@ -341,8 +404,12 @@ Result<void> VM::step() {
}
if (res.has_error()) {
if (res.error() == ErrorCode::EndOfProgram) return res;
auto obj = TRY(geterrobj().copy());
if (obj.is<Nil>()) return res;
if (obj.is<Nil>()) {
obj = TRY(wrap_error(res.error()));
}
if (res.error() == ErrorCode::Raise) {
if (obj.is<Continuation>()) {

2
src/vm.hpp
View file

@ -49,6 +49,7 @@ class VM {
Result<void> vm_selfcall(Opcode& oc);
Result<void> vm_call_lisp(Opcode& oc, Function& fun);
Result<void> vm_call_stdlib(Opcode& oc, StdlibFunction& fun);
Result<void> vm_call_cont(Opcode& oc, Continuation& fun);
Result<void> vm_ret(Opcode& oc);
Result<void> vm_equal(Opcode& oc);
@ -62,6 +63,7 @@ class VM {
Result<void> vm_global_load(Opcode& oc);
Result<void> vm_global_store(Opcode& oc);
Result<Value> unwind(const Continuation& cont);
Result<StackFrame> handle_raise(const Continuation& cont);
Result<Value> get(bool is_const, uint64_t idx);

7
src/writer.cpp
View file

@ -122,7 +122,12 @@ Result<String> Writer::write_bool(const Bool& val) {
}
Result<String> Writer::write_bytearray(const ByteArray& val) {
return ERROR(NotImplemented);
String res = TRY(String::create("#<bytearray "));
res = TRY(res.concat(TRY(val.hex())));
res = TRY(res.concat(">"));
return res;
}
Result<String> Writer::write_string(const String& val) {

4
test/continuations.vli Normal file
View file

@ -0,0 +1,4 @@
(assert (= ((guard (fn () (+ 1 (raise 2)))
(fn (e x) x))
2)
3))

2
test/serialize.vli Normal file
View file

@ -0,0 +1,2 @@
(assert (= (deserialize (serialize ["foo" "bar" 1]))
["foo" "bar" 1]))