static void ffi_ptr_dereference_assign(VMState *state, CallInfo *info) {
VM_ASSERT(info->args_len == 3, "wrong arity: expected 2, got %i", info->args_len);
Object *root = state->root;
Object *pointer_base = state->shared->vcache.pointer_base;
FFIObject *ffi = (FFIObject*) AS_OBJ(OBJECT_LOOKUP(root, ffi));
Object *ffi_type = AS_OBJ(OBJECT_LOOKUP((Object*) ffi, type));
Object *thisptr = AS_OBJ(load_arg(state->frame, info->this_arg));
VM_ASSERT(thisptr->parent == pointer_base, "internal error");
PointerObject *thisptr_obj = (PointerObject*) thisptr;
Object *ffi_type_obj = obj_instance_of(OBJ_OR_NULL(load_arg(state->frame, INFO_ARGS_PTR(info)[0])), ffi_type);
Value offs_val = load_arg(state->frame, INFO_ARGS_PTR(info)[1]);
VM_ASSERT(IS_INT(offs_val), "offset must be integer");
int offs = AS_INT(offs_val);
VM_ASSERT(ffi_type_obj, "type is not a FFI type");
char *offset_ptr = (char*) thisptr_obj->ptr + offs;
Value value = load_arg(state->frame, INFO_ARGS_PTR(info)[2]);
(void) offset_ptr; (void) value;
if (ffi_type_obj == ffi->long_obj) {
VM_ASSERT(IS_INT(value), "can only assign integer to long");
*(long*) offset_ptr = AS_INT(value);
} else {
fprintf(stderr, "TODO\n");
abort();
}
}
static void ffi_ptr_dereference(VMState *state, CallInfo *info) {
VM_ASSERT(info->args_len == 2, "wrong arity: expected 2, got %i", info->args_len);
Object *root = state->root;
Object *pointer_base = state->shared->vcache.pointer_base;
FFIObject *ffi = (FFIObject*) AS_OBJ(OBJECT_LOOKUP(root, ffi));
Object *ffi_type = AS_OBJ(OBJECT_LOOKUP((Object*) ffi, type));
Object *thisptr = AS_OBJ(load_arg(state->frame, info->this_arg));
VM_ASSERT(thisptr->parent == pointer_base, "internal error");
PointerObject *thisptr_obj = (PointerObject*) thisptr;
Object *ffi_type_obj = obj_instance_of(OBJ_OR_NULL(load_arg(state->frame, INFO_ARGS_PTR(info)[0])), ffi_type);
Value offs_val = load_arg(state->frame, INFO_ARGS_PTR(info)[1]);
VM_ASSERT(IS_INT(offs_val), "offset must be integer");
int offs = AS_INT(offs_val);
VM_ASSERT(ffi_type_obj, "type is not a FFI type");
char *offset_ptr = (char*) thisptr_obj->ptr + offs;
if (ffi_type_obj == ffi->short_obj) {
short s = *(short*) offset_ptr;
vm_return(state, info, INT2VAL(s));
} else if (ffi_type_obj == ffi->ushort_obj) {
unsigned short us = *(unsigned short*) offset_ptr;
vm_return(state, info, INT2VAL(us));
} else if (ffi_type_obj == ffi->int_obj) {
int i = *(int*) offset_ptr;
vm_return(state, info, INT2VAL(i));
} else if (ffi_type_obj == ffi->uint_obj) {
unsigned int u = *(unsigned int*) offset_ptr;
vm_return(state, info, INT2VAL(u));
} else if (ffi_type_obj == ffi->int8_obj) {
int8_t i8 = *(int8_t*) offset_ptr;
vm_return(state, info, INT2VAL(i8));
} else if (ffi_type_obj == ffi->uint8_obj) {
uint8_t u8 = *(uint8_t*) offset_ptr;
vm_return(state, info, INT2VAL(u8));
} else if (ffi_type_obj == ffi->int32_obj) {
int32_t i32 = *(int32_t*) offset_ptr;
vm_return(state, info, INT2VAL(i32));
} else if (ffi_type_obj == ffi->uint32_obj) {
uint32_t u32 = *(uint32_t*) offset_ptr;
vm_return(state, info, INT2VAL(u32));
} else if (ffi_type_obj == ffi->pointer_obj) {
void *ptr = *(void**) offset_ptr;
vm_return(state, info, make_ffi_pointer(state, ptr));
} else if (ffi_type_obj == ffi->char_pointer_obj) {
char *ptr = *(char**) offset_ptr;
vm_return(state, info, make_string_static(state, ptr));
} else if (ffi_type_obj == ffi->long_obj) {
long l = *(long*) offset_ptr;
if (l < INT_MIN || l > INT_MAX) {
VM_ASSERT(false, "value exceeds bounds of my int type");
}
vm_return(state, info, INT2VAL((int) l));
} else { fprintf(stderr, "TODO\n"); abort(); }
}
static void ffi_open_fn(VMState *state, CallInfo *info) {
VM_ASSERT(info->args_len == 1, "wrong arity: expected 1, got %i", info->args_len);
Object *root = state->root;
Object *string_base = state->shared->vcache.string_base;
Object *array_base = state->shared->vcache.array_base;
Object *ffi = AS_OBJ(OBJECT_LOOKUP(root, ffi));
Object *handle_base = AS_OBJ(OBJECT_LOOKUP(ffi, handle));
StringObject *sarg = (StringObject*) obj_instance_of(OBJ_OR_NULL(load_arg(state->frame, INFO_ARGS_PTR(info)[0])), string_base);
VM_ASSERT(sarg, "argument to ffi.open must be string!");
Object *libmap = AS_OBJ(OBJECT_LOOKUP(ffi, library_map));
char *file = sarg->value;
bool file_found = false;
FastKey file_key = prepare_key(file, strlen(file));
Value mapping = object_lookup_p(libmap, &file_key, &file_found);
const char **file_list_ptr = NULL;
int file_list_len = 0;
if (file_found) {
ArrayObject *aobj = (ArrayObject*) obj_instance_of(OBJ_OR_NULL(mapping), array_base);
StringObject *sobj = (StringObject*) obj_instance_of(OBJ_OR_NULL(mapping), string_base);
if (aobj) {
file_list_len = aobj->length;
file_list_ptr = malloc(sizeof(char*) * file_list_len);
for (int i = 0; i < file_list_len; i++) {
StringObject *file = (StringObject*) obj_instance_of(OBJ_OR_NULL(aobj->ptr[i]), string_base);
VM_ASSERT(file, "library_map sub-entries must be string");
file_list_ptr[i] = my_asprintf("%s", file->value); // outside gc, make copy
}
} else if (sobj) {
file_list_len = 1;
file_list_ptr = malloc(sizeof(char*) * 1);
file_list_ptr[0] = my_asprintf("%s", sobj->value);
} else VM_ASSERT(false, "library_map entries must be string or array");
} else {
file_list_len = 1;
file_list_ptr = malloc(sizeof(char*) * 1);
file_list_ptr[0] = file;
}
void *dlptr = my_dlopen(file_list_len, file_list_ptr);
Object *handle_obj = AS_OBJ(make_object(state, handle_base, false));
handle_obj->flags |= OBJ_FROZEN;
OBJECT_SET(state, handle_obj, pointer, make_ptr(state, dlptr));
vm_return(state, info, OBJ2VAL(handle_obj));
}
static void ffi_ptr_index_assign_fn(VMState *state, CallInfo *info) {
VM_ASSERT(info->args_len == 2, "wrong arity: expected 2, got %i", info->args_len);
Object *pointer_base = state->shared->vcache.pointer_base;
Object *thisptr = OBJ_OR_NULL(load_arg(state->frame, info->this_arg));
VM_ASSERT(thisptr && thisptr->parent == pointer_base, "invalid pointer index write on non-pointer object");
PointerObject *thisptr_obj = (PointerObject*) thisptr;
Object *ffi_type_obj = AS_OBJ(OBJECT_LOOKUP(thisptr, target_type));
VM_ASSERT(ffi_type_obj, "cannot assign index on untyped pointer!");
Value offs_val = load_arg(state->frame, INFO_ARGS_PTR(info)[0]);
VM_ASSERT(IS_INT(offs_val), "offset must be integer");
int offs = AS_INT(offs_val);
Value sizeof_val = OBJECT_LOOKUP(ffi_type_obj, sizeof);
VM_ASSERT(IS_INT(sizeof_val), "internal error: sizeof wrong type or undefined");
int elemsize = AS_INT(sizeof_val);
char *offset_ptr = (char*) thisptr_obj->ptr + elemsize * offs;
bool res = ffi_pointer_write(state, ffi_type_obj, (void*) offset_ptr, load_arg(state->frame, INFO_ARGS_PTR(info)[1]));
if (!res) return;
}
static void ffi_ptr_add(VMState *state, CallInfo *info) {
VM_ASSERT(info->args_len == 1, "wrong arity: expected 1, got %i", info->args_len);
Object *pointer_base = state->shared->vcache.pointer_base;
Object *thisptr = OBJ_OR_NULL(load_arg(state->frame, info->this_arg));
VM_ASSERT(thisptr && thisptr->parent == pointer_base, "internal error");
PointerObject *thisptr_obj = (PointerObject*) thisptr;
void *ptr = (void*) thisptr_obj->ptr;
int elemsize = 1;
Value target_type = OBJECT_LOOKUP(thisptr, target_type);
if (!IS_NULL(target_type)) {
VM_ASSERT(IS_OBJ(target_type), "target type must be ffi type");
Value sizeof_val = OBJECT_LOOKUP(AS_OBJ(target_type), sizeof);
VM_ASSERT(IS_INT(sizeof_val), "internal error: sizeof wrong type or undefined");
elemsize = AS_INT(sizeof_val);
}
int main(int argc, char **argv)
{
char *app, *server, *match, *parm, *tmp, *cmd, *extra;
int i, j, c, fd;
int verbose, result, status, base, run, info, reply, display, max, prefix, timeout, fmt, pos, flags, munge, show;
struct katcl_line *l, *k;
fd_set fsr, fsw;
struct timeval tv;
server = getenv("KATCP_SERVER");
if(server == NULL){
server = "localhost";
}
info = 1;
reply = 1;
verbose = 1;
i = j = 1;
app = argv[0];
base = (-1);
timeout = 5;
fmt = FMT_TEXT;
pos = (-1);
k = NULL;
munge = 0;
show = 1;
while (i < argc) {
if (argv[i][0] == '-') {
c = argv[i][j];
switch (c) {
case 'h' :
usage(app);
return 0;
case 'v' :
verbose++;
j++;
break;
case 'q' :
verbose = 0;
info = 0;
reply = 0;
j++;
break;
case 'i' :
info = 1 - info;
j++;
break;
case 'r' :
reply = 1 - reply;
j++;
break;
case 'n' :
show = 0;
j++;
break;
case 'k' :
k = create_katcl(STDOUT_FILENO);
if(k == NULL){
fprintf(stderr, "%s: unable to create katcp message logic\n", app);
return 2;
}
j++;
break;
case 'a' :
fmt = FMT_AUTO;
j++;
break;
case 'x' :
fmt = FMT_HEX;
j++;
break;
case 'b' :
fmt = FMT_BIN;
j++;
break;
case 'm' :
munge = 1;
j++;
break;
case 's' :
case 't' :
case 'p' :
j++;
if (argv[i][j] == '\0') {
j = 0;
i++;
}
if (i >= argc) {
fprintf(stderr, "%s: argument needs a parameter\n", app);
return 2;
}
switch(c){
case 's' :
server = argv[i] + j;
break;
case 't' :
timeout = atoi(argv[i] + j);
break;
case 'p' :
pos = atoi(argv[i] + j);
if(pos < 0){
fprintf(stderr, "%s: position needs to be nonnegative, not %d\n", app, pos);
return 2;
}
break;
}
i++;
j = 1;
break;
case '-' :
j++;
break;
case '\0':
j = 1;
i++;
break;
default:
fprintf(stderr, "%s: unknown option -%c\n", app, argv[i][j]);
return 2;
}
} else {
base = i;
i = argc;
}
}
if(munge){
if(k){
reply = 1;
}
}
if(base < 0){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "no command given");
}
fprintf(stderr, "%s: need a command to send (use -h for help)\n", app);
return 2;
}
status = 1;
flags = 0;
if(verbose > 0){
flags = NETC_VERBOSE_ERRORS;
if(verbose > 1){
flags = NETC_VERBOSE_STATS;
}
}
fd = net_connect(server, 0, flags);
if(fd < 0){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "unable to connect to %s", server);
}
return 2;
}
l = create_katcl(fd);
if(l == NULL){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "unable to create katcp parser");
}
fprintf(stderr, "%s: unable to create katcp parser\n", app);
return 2;
}
i = base;
match = NULL;
flags = ((i + 1) < argc) ? KATCP_FLAG_FIRST : (KATCP_FLAG_FIRST | KATCP_FLAG_LAST);
switch(argv[i][0]){
case KATCP_REQUEST :
match = argv[i] + 1;
/* FALL */
case KATCP_INFORM :
case KATCP_REPLY :
append_string_katcl(l, flags, argv[i]);
break;
default :
match = argv[i];
append_args_katcl(l, flags, "%c%s", KATCP_REQUEST, argv[i]);
break;
}
i++;
while(i < argc){
tmp = argv[i];
i++;
flags = (i < argc) ? 0 : KATCP_FLAG_LAST;
if(load_arg(l, tmp, fmt, flags) < 0){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "unable to load argument %d", i);
}
fprintf(stderr, "%s: unable to load argument %d\n", app, i);
return 2;
}
}
if(match){
for(prefix = 0; (match[prefix] != '\0') && (match[prefix] != ' '); prefix++);
#ifdef DEBUG
fprintf(stderr, "debug: checking prefix %d of %s\n", prefix, match);
#endif
} else {
prefix = 0; /* pacify -Wall, prefix only used if match is set */
}
/* WARNING: logic a bit intricate */
for(run = 1; run;){
FD_ZERO(&fsr);
FD_ZERO(&fsw);
if(match){ /* only look for data if we need it */
FD_SET(fd, &fsr);
}
if(flushing_katcl(l)){ /* only write data if we have some */
FD_SET(fd, &fsw);
}
tv.tv_sec = timeout;
tv.tv_usec = 0;
result = select(fd + 1, &fsr, &fsw, NULL, &tv);
switch(result){
case -1 :
switch(errno){
case EAGAIN :
case EINTR :
continue; /* WARNING */
default :
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "select failed: %s", strerror(errno));
}
return 2;
}
break;
case 0 :
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "request timed out after %d seconds", timeout);
}
if(verbose){
fprintf(stderr, "%s: no io activity within %d seconds\n", app, timeout);
}
/* could terminate cleanly here, but ... */
return 2;
}
if(FD_ISSET(fd, &fsw)){
result = write_katcl(l);
if(result < 0){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "write failed: %s", strerror(errno));
}
fprintf(stderr, "%s: write failed: %s\n", app, strerror(error_katcl(l)));
return 2;
}
if((result > 0) && (match == NULL)){ /* if we finished writing and don't expect a match then quit */
run = 0;
}
}
if(FD_ISSET(fd, &fsr)){
result = read_katcl(l);
if(result){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "read failed: %s", (result < 0) ? strerror(error_katcl(l)) : "connection terminated");
}
fprintf(stderr, "%s: read failed: %s\n", app, (result < 0) ? strerror(error_katcl(l)) : "connection terminated");
return 2;
}
}
while(have_katcl(l) > 0){
cmd = arg_string_katcl(l, 0);
if(cmd){
display = 0;
switch(cmd[0]){
case KATCP_INFORM :
display = info;
if(show == 0){
if(!strcmp(KATCP_VERSION_CONNECT_INFORM, cmd)){
display = 0;
}
}
break;
case KATCP_REPLY :
display = reply;
parm = arg_string_katcl(l, 1);
if(match){
if(strncmp(match, cmd + 1, prefix) || ((cmd[prefix + 1] != '\0') && (cmd[prefix + 1] != ' '))){
if(k){
sync_message_katcl(k, KATCP_LEVEL_WARN, KCPCMD_NAME, "encountered unexpected reply %s", cmd);
}
fprintf(stderr, "%s: warning: encountered unexpected reply <%s>\n", app, cmd);
} else {
if(parm && !strcmp(parm, KATCP_OK)){
status = 0;
}
run = 0;
}
}
break;
case KATCP_REQUEST :
if(k){
sync_message_katcl(k, KATCP_LEVEL_WARN, KCPCMD_NAME, "encountered unanswerable request %s", cmd);
}
fprintf(stderr, "%s: warning: encountered an unanswerable request <%s>\n", app, cmd);
break;
default :
if(k){
sync_message_katcl(k, KATCP_LEVEL_WARN, KCPCMD_NAME, "read malformed message %s", cmd);
}
fprintf(stderr, "%s: read malformed message <%s>\n", app, cmd);
break;
}
if(display){
#ifdef DEBUG
fprintf(stderr, "need to display\n");
#endif
if(k){
if(munge && parm && (cmd[0] == KATCP_REPLY)){
if(!strcmp(parm, KATCP_OK)){
sync_message_katcl(k, KATCP_LEVEL_DEBUG, cmd + 1, KATCP_OK);
} else {
extra = arg_string_katcl(l, 2);
sync_message_katcl(k, KATCP_LEVEL_WARN, cmd + 1, "%s (%s)", parm, extra ? extra : "no extra information");
}
} else {
relay_katcl(l, k);
}
} else {
max = arg_count_katcl(l);
if(pos < 0){
for(i = 0; i < max; i++){
if(print_arg(l, i, fmt) < 0){
fprintf(stderr, "%s: failed to print argument %d\n", app, i);
return 2;
}
fputc(((i + 1) == max) ? '\n' : ' ' , stdout);
}
} else {
if(pos < max){
i = pos;
if(print_arg(l, i, fmt) < 0){
fprintf(stderr, "%s: failed to print argument %d\n", app, i);
return 2;
}
}
}
}
}
}
}
}
destroy_katcl(l, 1);
if(k){
while(write_katcl(k) == 0);
destroy_katcl(k, 0);
}
return status;
}
VM_ASSERT(thisptr && thisptr->parent == pointer_base, "internal error");
PointerObject *thisptr_obj = (PointerObject*) thisptr;
void *ptr = (void*) thisptr_obj->ptr;
int elemsize = 1;
Value target_type = OBJECT_LOOKUP(thisptr, target_type);
if (!IS_NULL(target_type)) {
VM_ASSERT(IS_OBJ(target_type), "target type must be ffi type");
Value sizeof_val = OBJECT_LOOKUP(AS_OBJ(target_type), sizeof);
VM_ASSERT(IS_INT(sizeof_val), "internal error: sizeof wrong type or undefined");
elemsize = AS_INT(sizeof_val);
}
Value offset_val = load_arg(state->frame, INFO_ARGS_PTR(info)[0]);
VM_ASSERT(IS_INT(offset_val), "offset must be integer");
int offset = AS_INT(offset_val);
vm_return(state, info, make_ffi_pointer(state, (void*) ((char*)ptr + offset * elemsize)));
}
static Value make_ffi_pointer(VMState *state, void *ptr) {
Object *ptr_obj = AS_OBJ(make_ptr(state, ptr));
OBJECT_SET(state, ptr_obj, dereference, make_fn(state, ffi_ptr_dereference));
OBJECT_SET(state, ptr_obj, dereference_assign, make_fn(state, ffi_ptr_dereference_assign));
OBJECT_SET(state, ptr_obj, __add, make_fn(state, ffi_ptr_add));
OBJECT_SET(state, ptr_obj, target_type, VNULL);
OBJECT_SET(state, ptr_obj, __slice, make_fn(state, ffi_ptr_index_fn));
OBJECT_SET(state, ptr_obj, __slice_assign, make_fn(state, ffi_ptr_index_assign_fn));
return OBJ2VAL(ptr_obj);