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More work in serialization

This commit is contained in:
Calvin Rose 2017-05-11 17:08:29 -04:00
parent b7083f6f18
commit 6220b70105
7 changed files with 254 additions and 107 deletions
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20
core/compile.c
View File

@ -85,6 +85,8 @@ struct GstScope {
uint16_t frameSize;
uint32_t heapCapacity;
uint32_t heapSize;
uint16_t touchParent;
uint16_t touchEnv;
uint16_t *freeHeap;
GstTable *literals;
GstArray *literalsArray;
@ -137,6 +139,8 @@ static GstScope *compiler_push_scope(GstCompiler *c, int sameFunction) {
scope->heapCapacity = 10;
scope->parent = c->tail;
scope->frameSize = 0;
scope->touchParent = 0;
scope->touchEnv = 0;
if (c->tail) {
scope->level = c->tail->level + (sameFunction ? 0 : 1);
} else {
@ -478,6 +482,18 @@ static Slot compile_symbol(GstCompiler *c, FormOptions opts, GstValue sym) {
return compile_literal(c, opts, lit);
} else if (level > 0) {
/* We have an upvalue */
if (level > 1) {
/* We have an upvalue from a parent function. Make
* sure that the chain of functions up to the upvalue keep
* their parent references */
uint32_t i = level;
GstScope *scope = c->tail;
for (i = level; i > 1; --i) {
scope->touchParent = 1;
scope = scope->parent;
}
scope->touchEnv = 1;
}
ret = compiler_get_target(c, opts);
gst_buffer_push_u16(c->vm, buffer, GST_OP_UPV);
gst_buffer_push_u16(c->vm, buffer, ret.index);
@ -600,7 +616,9 @@ static GstFuncDef *compiler_gen_funcdef(GstCompiler *c, uint32_t lastNBytes, uin
/* Initialize the new FuncDef */
def->locals = scope->frameSize;
def->arity = arity;
def->flags = varargs ? GST_FUNCDEF_FLAG_VARARG : 0;
def->flags = (varargs ? GST_FUNCDEF_FLAG_VARARG : 0) |
(scope->touchParent ? GST_FUNCDEF_FLAG_NEEDSPARENT : 0) |
(scope->touchEnv ? GST_FUNCDEF_FLAG_NEEDSENV : 0);
return def;
}

2
core/ids.c
View File

@ -50,7 +50,7 @@ static int gst_cache_equal(GstValue x, GstValue y) {
uint32_t i, len;
if (x.type != y.type) return 0;
switch (x.type) {
/* Don't bother implemeting equality checks for all types. We only care
/* Don't bother implementing equality checks for all types. We only care
* about immutable data structures */
default:
return 0;

261
core/serialize.c
View File

@ -34,8 +34,8 @@
* Byte 203: False
* Byte 204: Number - double format
* Byte 205: String - [u32 length]*[u8... characters]
* Byte 206: Symbol - [u32 length]*[u8... characters]
* Byte 207: Buffer - [u32 length]*[u8... characters]
* Byte 206: Struct - [u32 length]*2*[value... kvs]
* Byte 207: Buffer - [u32 capacity][u32 length]*[u8... characters]
* Byte 208: Array - [u32 length]*[value... elements]
* Byte 209: Tuple - [u32 length]*[value... elements]
* Byte 210: Thread - [value parent][u8 state][u32 frames]*[[value callee][value env]
@ -192,30 +192,33 @@ static const char *gst_deserialize_impl(
break;
case 207: /* Buffer */
ret.type = GST_BYTEBUFFER;
read_u32(length);
deser_datacheck(length);
ret.data.buffer = gst_alloc(vm, sizeof(GstBuffer));
ret.data.buffer->data = gst_alloc(vm, length);
gst_memcpy(ret.data.buffer->data, data, length);
ret.data.buffer->count = length;
ret.data.buffer->capacity = length;
data += length;
gst_array_push(vm, visited, ret);
{
uint32_t cap;
ret.type = GST_BYTEBUFFER;
read_u32(cap);
read_u32(length);
deser_datacheck(length);
ret.data.buffer = gst_alloc(vm, sizeof(GstBuffer));
ret.data.buffer->data = gst_alloc(vm, cap);
gst_memcpy(ret.data.buffer->data, data, length);
ret.data.buffer->count = length;
ret.data.buffer->capacity = cap;
gst_array_push(vm, visited, ret);
}
break;
case 208: /* Array */
ret.type = GST_ARRAY;
read_u32(length);
buffer = gst_alloc(vm, length * sizeof(GstValue));
for (i = 0; i < length; ++i)
if ((err = gst_deserialize_impl(vm, data, end, &data, visited, buffer + i)))
return err;
ret.data.array = gst_alloc(vm, sizeof(GstArray));
ret.data.array->data = buffer;
ret.data.array->count = length;
ret.data.array->capacity = length;
gst_array_push(vm, visited, ret);
for (i = 0; i < length; ++i)
if ((err = gst_deserialize_impl(vm, data, end, &data, visited, buffer + i)))
return err;
break;
case 209: /* Tuple */
@ -237,11 +240,17 @@ static const char *gst_deserialize_impl(
uint16_t prevsize = 0;
uint8_t statusbyte;
t = gst_thread(vm, gst_wrap_nil(), 64);
gst_array_push(vm, visited, gst_wrap_thread(t));
err = gst_deserialize_impl(vm, data, end, &data, visited, &ret);
if (err != NULL) return err;
if (ret.type != GST_THREAD) return "expected thread parent to thread";
t->parent = ret.data.thread;
ret.data.thread = t;
if (ret.type == GST_NIL) {
t->parent = NULL;
} else if (ret.type == GST_THREAD) {
t->parent = ret.data.thread;
} else {
return "expected thread parent to thread";
}
ret = gst_wrap_thread(t);
deser_assert(data < end, UEB);
statusbyte = *data++;
read_u32(length);
@ -275,6 +284,8 @@ static const char *gst_deserialize_impl(
gst_frame_pc(stack) = callee.data.function->def->byteCode + pcoffset;
if (env.type == GST_FUNCENV)
gst_frame_env(stack) = env.data.env;
else
gst_frame_env(stack) = NULL;
}
gst_frame_ret(stack) = ret;
gst_frame_args(stack) = args;
@ -292,19 +303,16 @@ static const char *gst_deserialize_impl(
break;
case 211: /* Table */
{
ret.type = GST_TABLE;
read_u32(length);
ret.data.table = gst_table(vm, 2 * length);
for (i = 0; i < length; ++i) {
GstValue key, value;
err = gst_deserialize_impl(vm, data, end, &data, visited, &key);
if (err != NULL) return err;
err = gst_deserialize_impl(vm, data, end, &data, visited, &value);
if (err != NULL) return err;
gst_table_put(vm, ret.data.table, key, value);
}
gst_array_push(vm, visited, ret);
read_u32(length);
ret = gst_wrap_table(gst_table(vm, 2 * length));
gst_array_push(vm, visited, ret);
for (i = 0; i < length; ++i) {
GstValue key, value;
err = gst_deserialize_impl(vm, data, end, &data, visited, &key);
if (err != NULL) return err;
err = gst_deserialize_impl(vm, data, end, &data, visited, &value);
if (err != NULL) return err;
gst_table_put(vm, ret.data.table, key, value);
}
break;
@ -317,8 +325,8 @@ static const char *gst_deserialize_impl(
read_u32(flags);
read_u32(literalsLen);
def = gst_alloc(vm, sizeof(GstFuncDef));
ret.type = GST_FUNCDEF;
ret.data.def = def;
ret = gst_wrap_funcdef(def);
gst_array_push(vm, visited, ret);
def->locals = locals;
def->arity = arity;
def->flags = flags;
@ -337,18 +345,18 @@ static const char *gst_deserialize_impl(
for (i = 0; i < byteCodeLen; ++i) {
read_u16(def->byteCode[i]);
}
gst_array_push(vm, visited, ret);
}
break;
case 213: /* Funcenv */
{
GstValue thread;
ret.type = GST_FUNCENV;
ret.data.env = gst_alloc(vm, sizeof(GstFuncEnv));
gst_array_push(vm, visited, ret);
err = gst_deserialize_impl(vm, data, end, &data, visited, &thread);
if (err != NULL) return err;
read_u32(length);
ret.type = GST_FUNCENV;
ret.data.env = gst_alloc(vm, sizeof(GstFuncEnv));
ret.data.env->stackOffset = length;
if (thread.type == GST_THREAD) {
ret.data.env->thread = thread.data.thread;
@ -362,21 +370,21 @@ static const char *gst_deserialize_impl(
ret.data.env->values[i] = item;
}
}
gst_array_push(vm, visited, ret);
}
break;
case 214: /* Function */
{
GstValue parent, def, env;
ret.type = GST_FUNCTION;
ret.data.function = gst_alloc(vm, sizeof(GstFunction));
gst_array_push(vm, visited, ret);
err = gst_deserialize_impl(vm, data, end, &data, visited, &parent);
if (err != NULL) return err;
err = gst_deserialize_impl(vm, data, end, &data, visited, &def);
if (err != NULL) return err;
err = gst_deserialize_impl(vm, data, end, &data, visited, &env);
if (err != NULL) return err;
ret.type = GST_FUNCTION;
ret.data.function = gst_alloc(vm, sizeof(GstFunction));
if (parent.type == GST_NIL) {
ret.data.function->parent = NULL;
} else if (parent.type == GST_FUNCTION) {
@ -385,10 +393,13 @@ static const char *gst_deserialize_impl(
deser_error("expected function");
}
deser_assert(def.type == GST_FUNCDEF, "expected funcdef");
deser_assert(env.type == GST_FUNCENV, "expected funcenv");
ret.data.function->env = env.data.env;
ret.data.function->def = env.data.def;
gst_array_push(vm, visited, ret);
if (env.type == GST_NIL) {
ret.data.function->env = NULL;
} else {
deser_assert(env.type == GST_FUNCENV, "expected funcenv");
ret.data.function->env = env.data.env;
}
}
break;
@ -416,8 +427,6 @@ static const char *gst_deserialize_impl(
read_i64(ret.data.integer);
break;
}
/* Handle a successful return */
*out = ret;
*newData = data;
return NULL;
@ -429,11 +438,11 @@ const char *gst_deserialize(
const uint8_t *data,
uint32_t len,
GstValue *out,
const uint8_t *nextData) {
const uint8_t **nextData) {
GstValue ret;
const char *err;
GstArray *visited = gst_array(vm, 10);
err = gst_deserialize_impl(vm, data, data + len, &nextData, visited, &ret);
err = gst_deserialize_impl(vm, data, data + len, nextData, visited, &ret);
if (err != NULL) return err;
*out = ret;
return NULL;
@ -443,6 +452,7 @@ const char *gst_deserialize(
BUFFER_DEFINE(real, GstReal)
BUFFER_DEFINE(integer, GstInteger)
BUFFER_DEFINE(u32, uint32_t)
BUFFER_DEFINE(u16, uint32_t)
/* Serialize a value and write to a buffer. Returns possible
* error messages. */
@ -465,6 +475,8 @@ const char *gst_serialize_impl(
/* Check non reference types - if successful, return NULL */
switch (x.type) {
case GST_CFUNCTION:
case GST_USERDATA:
case GST_NIL:
write_byte(201);
return NULL;
@ -483,7 +495,7 @@ const char *gst_serialize_impl(
write_int(x.data.integer);
}
return NULL;
case GST_CFUNCTION:
/*case GST_CFUNCTION:*/
/* TODO */
break;
default:
@ -498,10 +510,50 @@ const char *gst_serialize_impl(
return NULL;
}
/* Check tuples and structs before other reference types.
* They ae immutable, and thus cannot be referenced by other values
* until they are fully constructed. This creates some strange behavior
* if they are treated like other reference types because they cannot
* be added to the visited table before recusring into serializing their
* arguments */
if (x.type == GST_STRUCT || x.type == GST_TUPLE) {
if (x.type == GST_STRUCT) {
const GstValue *data;
write_byte(206);
gst_hashtable_view(x, &data, &count);
write_u32(gst_struct_length(x.data.st));
for (i = 0; i < count; i += 2) {
if (data[i].type != GST_NIL) {
err = gst_serialize_impl(vm, buffer, visited, nextId, data[i]);
if (err != NULL) return err;
err = gst_serialize_impl(vm, buffer, visited, nextId, data[i + 1]);
if (err != NULL) return err;
}
}
} else {
write_byte(209);
count = gst_tuple_length(x.data.tuple);
write_u32(count);
for (i = 0; i < count; ++i) {
err = gst_serialize_impl(vm, buffer, visited, nextId, x.data.tuple[i]);
if (err != NULL) return err;
}
}
/* Record reference */
gst_table_put(vm, visited, x, gst_wrap_integer(*nextId));
*nextId = *nextId + 1;
return NULL;
}
/* Record reference */
gst_table_put(vm, visited, x, gst_wrap_integer(*nextId));
*nextId = *nextId + 1;
/* Check reference types */
switch (x.type) {
default:
return "unable to serialize type";
case GST_STRING:
write_byte(205);
count = gst_string_length(x.data.string);
@ -510,27 +562,34 @@ const char *gst_serialize_impl(
write_byte(x.data.string[i]);
}
break;
case GST_STRUCT:
write_byte(206);
count = gst_struct_length(x.data.st);
write_u32(count);
for (i = 0; i < gst_struct_capacity(x.data.st); i += 2) {
if (x.data.st[i].type != GST_NIL) {
err = gst_serialize_impl(vm, buffer, visited, nextId, x.data.st[i]);
if (err != NULL) return err;
err = gst_serialize_impl(vm, buffer, visited, nextId, x.data.st[i + 1]);
if (err != NULL) return err;
case GST_TABLE:
{
const GstValue *data;
write_byte(211);
gst_hashtable_view(x, &data, &count);
write_u32(x.data.table->count);
for (i = 0; i < count; i += 2) {
if (data[i].type != GST_NIL) {
err = gst_serialize_impl(vm, buffer, visited, nextId, data[i]);
if (err != NULL) return err;
err = gst_serialize_impl(vm, buffer, visited, nextId, data[i + 1]);
if (err != NULL) return err;
}
}
}
break;
case GST_BYTEBUFFER:
write_byte(207);
count = x.data.buffer->count;
write_u32(x.data.buffer->capacity);
write_u32(count);
for (i = 0; i < count; ++i) {
write_byte(x.data.buffer->data[i]);
}
break;
case GST_ARRAY:
write_byte(208);
count = x.data.array->count;
@ -540,22 +599,18 @@ const char *gst_serialize_impl(
if (err != NULL) return err;
}
break;
case GST_TUPLE:
write_byte(209);
count = gst_tuple_length(x.data.tuple);
write_u32(count);
for (i = 0; i < count; ++i) {
err = gst_serialize_impl(vm, buffer, visited, nextId, x.data.tuple[i]);
if (err != NULL) return err;
}
break;
case GST_THREAD:
{
GstThread *t = x.data.thread;
const GstValue *stack;
const GstValue *stack = t->data + GST_FRAME_SIZE;
uint32_t framecount = gst_thread_countframes(t);
uint32_t i;
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_thread(t->parent));
write_byte(210);
if (t->parent)
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_thread(t->parent));
else
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_nil());
if (err != NULL) return err;
/* Write the status byte */
if (t->status == GST_THREAD_PENDING) write_byte(0);
@ -570,7 +625,10 @@ const char *gst_serialize_impl(
GstFuncEnv *env = gst_frame_env(stack);
err = gst_serialize_impl(vm, buffer, visited, nextId, callee);
if (err != NULL) return err;
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_funcenv(env));
if (env)
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_funcenv(env));
else
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_nil());
if (err != NULL) return err;
if (callee.type == GST_FUNCTION) {
write_u32(gst_frame_pc(stack) - callee.data.function->def->byteCode);
@ -586,46 +644,69 @@ const char *gst_serialize_impl(
if (err != NULL) return err;
}
/* Next stack frame */
stack = t->data + GST_FRAME_SIZE;
stack += size + GST_FRAME_SIZE;
}
}
break;
case GST_TABLE:
write_byte(211);
count = x.data.table->count;
write_u32(count);
for (i = 0; i < x.data.table->capacity; i += 2) {
if (x.data.table->data[i].type == GST_NIL) continue;
err = gst_serialize_impl(vm, buffer, visited, nextId, x.data.tuple[i]);
if (err != NULL) return err;
err = gst_serialize_impl(vm, buffer, visited, nextId, x.data.tuple[i+1]);
if (err != NULL) return err;
}
break;
case GST_FUNCDEF: /* Funcdef */
{
/* TODO */
GstFuncDef *def = x.data.def;
write_byte(212);
write_u32(def->locals);
write_u32(def->arity);
write_u32(def->flags);
write_u32(def->literalsLen);
for (i = 0; i < def->literalsLen; ++i) {
err = gst_serialize_impl(vm, buffer, visited, nextId, def->literals[i]);
if (err != NULL) return err;
}
write_u32(def->byteCodeLen);
for (i = 0; i < def->byteCodeLen; ++i) {
write_u16(def->byteCode[i]);
}
}
break;
case GST_FUNCENV: /* Funcenv */
{
/* TODO */
GstFuncEnv *env = x.data.env;
write_byte(213);
if (env->thread) {
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_thread(env->thread));
if (err != NULL) return err;
write_u32(env->stackOffset);
} else {
write_byte(201); /* Write nil */
write_u32(env->stackOffset);
for (i = 0; i < env->stackOffset; ++i) {
err = gst_serialize_impl(vm, buffer, visited, nextId, env->values[i]);
if (err != NULL) return err;
}
}
}
break;
case GST_FUNCTION: /* Function */
{
/* TODO */
GstFunction *fn = x.data.function;
write_byte(214);
if (fn->parent)
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_function(fn->parent));
else
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_nil());
if (err != NULL) return err;
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_funcdef(fn->def));
if (err != NULL) return err;
if (fn->env == NULL)
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_nil());
else
err = gst_serialize_impl(vm, buffer, visited, nextId, gst_wrap_funcenv(fn->env));
if (err != NULL) return err;
}
break;
}
/* Record reference */
check.type = GST_INTEGER;
check.data.integer = *nextId++;
gst_table_put(vm, visited, x, check);
/* Return success */
return NULL;
}

65
core/stl.c
View File

@ -351,7 +351,7 @@ int gst_stl_struct(Gst *vm) {
GstValue *st;
if (count % 2 != 0)
gst_c_throwc(vm, "expected even number of arguments");
st = gst_struct_begin(vm, count * 2);
st = gst_struct_begin(vm, count / 2);
for (i = 0; i < count; i += 2)
gst_struct_put(st, gst_arg(vm, i), gst_arg(vm, i + 1));
gst_c_return(vm, gst_wrap_struct(gst_struct_end(vm, st)));
@ -572,18 +572,29 @@ int gst_stl_error(Gst *vm) {
/* Serialize data into buffer */
int gst_stl_serialize(Gst *vm) {
const char *err;
uint32_t i;
GstValue buffer = gst_arg(vm, 0);
GstValue buffer = gst_arg(vm, 1);
if (buffer.type != GST_BYTEBUFFER)
gst_c_throwc(vm, "expected buffer");
for (i = 1; i < gst_count_args(vm); ++i) {
err = gst_serialize(vm, buffer.data.buffer, gst_arg(vm, i));
if (err != NULL)
gst_c_throwc(vm, err);
}
buffer = gst_wrap_buffer(gst_buffer(vm, 10));
err = gst_serialize(vm, buffer.data.buffer, gst_arg(vm, 0));
if (err != NULL)
gst_c_throwc(vm, err);
gst_c_return(vm, buffer);
}
/* Deserialize data from a buffer */
int gst_stl_deserialize(Gst *vm) {
GstValue ret;
uint32_t len;
const uint8_t *data;
const char *err;
if (!gst_chararray_view(gst_arg(vm, 0), &data, &len))
gst_c_throwc(vm, "expected string/buffer");
err = gst_deserialize(vm, data, len, &ret, &data);
if (err != NULL)
gst_c_throwc(vm, err);
gst_c_return(vm, ret);
}
/****/
/* Registry */
/****/
@ -629,13 +640,41 @@ int gst_stl_namespace_get(Gst *vm) {
gst_c_return(vm, check);
}
/***/
/* Function reflection */
/***/
int gst_stl_funcenv(Gst *vm) {
GstFunction *fn;
if (!gst_check_function(vm, 0, &fn))
gst_c_throwc(vm, "expected function");
gst_c_return(vm, gst_wrap_funcenv(fn->env));
}
int gst_stl_funcdef(Gst *vm) {
GstFunction *fn;
if (!gst_check_function(vm, 0, &fn))
gst_c_throwc(vm, "expected function");
gst_c_return(vm, gst_wrap_funcdef(fn->def));
}
int gst_stl_funcparent(Gst *vm) {
GstFunction *fn;
if (!gst_check_function(vm, 0, &fn))
gst_c_throwc(vm, "expected function");
if (fn->parent)
gst_c_return(vm, gst_wrap_function(fn->parent));
else
return GST_RETURN_OK;
}
/****/
/* IO */
/****/
/* File type definition */
static GstUserType gst_stl_filetype = {
"io.file",
"std.file",
NULL,
NULL,
NULL,
@ -775,7 +814,7 @@ static GstInteger gst_stl_debugp_helper(Gst *vm, GstBuffer *b, GstTable *seen, G
str = gst_to_string(vm, check);
gst_buffer_append_cstring(vm, b, "<visited ");
gst_buffer_append(vm, b, str, gst_string_length(str));
gst_buffer_append_cstring(vm, b, " >");
gst_buffer_append_cstring(vm, b, ">");
} else {
uint8_t open, close;
uint32_t len, i;
@ -872,6 +911,7 @@ static const GstModuleItem const std_module[] = {
{"next", gst_stl_next},
{"error", gst_stl_error},
{"serialize", gst_stl_serialize},
{"deserialize", gst_stl_deserialize},
{"export!", gst_stl_export},
{"namespace", gst_stl_namespace},
{"namespace-set!", gst_stl_namespace_set},
@ -885,6 +925,9 @@ static const GstModuleItem const std_module[] = {
{"read", gst_stl_read},
{"write", gst_stl_write},
{"close", gst_stl_close},
{"funcenv", gst_stl_funcenv},
{"funcdef", gst_stl_funcdef},
{"funcparent", gst_stl_funcparent},
{"dasm", gst_stl_dasm},
{"gcollect", gst_stl_gcollect},
{"debugp", gst_stl_debugp},

7
core/vm.c
View File

@ -173,10 +173,13 @@ int gst_continue(Gst *vm) {
gst_error(vm, GST_NO_UPVALUE);
temp = v1.data.function->def->literals[pc[2]];
if (temp.type != GST_FUNCDEF)
gst_error(vm, "cannot create closure");
gst_error(vm, "cannot create closure from non-funcdef");
fn = gst_alloc(vm, sizeof(GstFunction));
fn->def = temp.data.def;
fn->parent = v1.data.function;
if (temp.data.def->flags & GST_FUNCDEF_FLAG_NEEDSPARENT)
fn->parent = v1.data.function;
else
fn->parent = NULL;
fn->env = gst_frame_env(stack);
temp.type = GST_FUNCTION;
temp.data.function = fn;

4
include/gst/gst.h
View File

@ -238,6 +238,8 @@ struct GstTable {
/* Some function defintion flags */
#define GST_FUNCDEF_FLAG_VARARG 1
#define GST_FUNCDEF_FLAG_NEEDSPARENT 2
#define GST_FUNCDEF_FLAG_NEEDSENV 4
/* A function definition. Contains information need to instantiate closures. */
struct GstFuncDef {
@ -448,7 +450,7 @@ const char *gst_deserialize(
const uint8_t *data,
uint32_t len,
GstValue *out,
const uint8_t *nextData);
const uint8_t **nextData);
const char *gst_serialize(Gst *vm, GstBuffer *buffer, GstValue x);

2
libs/repl.gst
View File

@ -24,4 +24,4 @@
(: ret ((compile (parse-consume p))))))
ret)))
(: res (tran t (readline)))
(if (= (status t) "dead") (print res) (print "Error: " res)))
(if (= (status t) "dead") (print (debugp res)) (print "Error: " (debugp res))))