unsigned int js_vm_intern_with_len(JSVirtualMachine * vm, const char *name, unsigned int len)
{
JSHashBucket *b;
unsigned int pos = js_count_hash(name, len) % JS_HASH_TABLE_SIZE;
for (b = vm->globals_hash[pos]; b; b = b->next)
if (strcmp(b->name, name) == 0)
return b->u.ui;
b = js_malloc(vm, sizeof(*b));
b->name = js_strdup(vm, name);
b->next = vm->globals_hash[pos];
vm->globals_hash[pos] = b;
/* Alloc space from the globals array. */
if (vm->num_globals >= vm->globals_alloc) {
// CHANGE alloc times to 16
vm->globals = js_realloc(vm, vm->globals, (vm->globals_alloc + 16) * sizeof(JSNode));
vm->globals_alloc += 16;
}
/* Initialize symbol's name spaces. */
vm->globals[vm->num_globals].type = JS_UNDEFINED;
b->u.ui = vm->num_globals++;
return b->u.ui;
}
int
js_vm_switch0_exec (JSVirtualMachine *vm, JSByteCode *bc,
JSSymtabEntry *symtab,
unsigned int num_symtab_entries,
unsigned int consts_offset,
unsigned int anonymous_function_offset,
/*unsigned char *debug_info, unsigned int debug_info_len,*/
JSNode *object, JSNode *func,
unsigned int argc, JSNode *argv)
{
int i;
unsigned int ui;
Function *global_f = NULL;
Function *f;
unsigned char *code = NULL;
char buf[512];
if (bc)
{
/* Executing byte-code. */
/* Find the code section. */
for (i = 0; i < bc->num_sects; i++)
if (bc->sects[i].type == JS_BCST_CODE)
code = bc->sects[i].data;
assert (code != NULL);
/* Enter all functions to the known functions of the VM. */
for (i = 0; i < num_symtab_entries; i++)
{
/* Need one function. */
f = js_vm_alloc_destroyable (vm, sizeof (*f));
f->destroy = function_destroy;
f->name = js_strdup (vm, symtab[i].name);
f->length = symtab[i + 1].offset - symtab[i].offset + 1;
f->code = js_malloc (vm, f->length);
memcpy (f->code, code + symtab[i].offset, f->length - 1);
f->code[f->length - 1] = 1; /* op `done' */
/* Link the code to our environment. */
link_code (vm, f->code, f->length, consts_offset);
if (strcmp (symtab[i].name, JS_GLOBAL_NAME) == 0)
global_f = f;
else
{
int is_anonymous = 0;
/* Check for the anonymous function. */
if (symtab[i].name[0] == '.' && symtab[i].name[1] == 'F'
&& symtab[i].name[2] == ':')
is_anonymous = 1;
if (vm->verbose > 3)
{
sprintf_P (buf, vmswt0_string_0,
symtab[i].name, symtab[i].offset,
symtab[i + 1].offset - symtab[i].offset);
if (is_anonymous)
sprintf_P (buf + strlen (buf), vmswt0_string_1,
anonymous_function_offset);
strcat (buf, JS_HOST_LINE_BREAK);
//js_iostream_write (vm->s_stderr, buf, strlen (buf));
}
if (is_anonymous)
{
sprintf (buf, ".F:%u",
(unsigned int) atoi (symtab[i].name + 3)
+ anonymous_function_offset);
ui = js_vm_intern (vm, buf);
}
else
ui = js_vm_intern (vm, symtab[i].name);
vm->globals[ui].type = JS_FUNC;
vm->globals[ui].u.vfunction = js_vm_make_function (vm, f);
}
}
}
else
{
/* Applying arguments to function. */
if (func->type != JS_FUNC)
{
sprintf_P (vm->error, vmswt0_string_2);
return 0;
}
if (vm->verbose > 1)
{
sprintf_P (buf, vmswt0_string_3, JS_HOST_LINE_BREAK);
//js_iostream_write (vm->s_stderr, buf, strlen (buf));
}
f = func->u.vfunction->implementation;
execute_code (vm, object, f, argc, argv);
}
if (global_f)
{
if (vm->verbose > 1)
{
sprintf_P (buf, vmswt0_string_4, global_f->name, JS_HOST_LINE_BREAK);
//js_iostream_write (vm->s_stderr, buf, strlen (buf));
}
/* Execute. */
execute_code (vm, NULL, global_f, 0, NULL);
}
return 1;
}
int js_vm_execute(JSVirtualMachine * vm, JSByteCode * bc)
{
int i, sect;
unsigned int ui;
unsigned char *cp;
unsigned int consts_offset;
char buf[256];
JSSymtabEntry *symtab = NULL;
unsigned int num_symtab_entries = 0;
unsigned int code_len = 0;
JSNode *saved_sp;
JSErrorHandlerFrame *handler, *saved_handler;
int result = 1;
#ifdef JS_RUNTIME_DEBUG
unsigned char *debug_info;
unsigned int debug_info_len;
#endif
unsigned int anonymous_function_offset;
/* We need a toplevel over the whole function. */
saved_sp = vm->sp;
saved_handler = vm->error_handler;
handler = js_calloc(NULL, 1, sizeof(*handler));
if (handler == NULL) {
#ifdef JS_RUNTIME_WARNING
sprintf(vm->error, "VM: out of memory");
#endif
return 0;
}
handler->next = vm->error_handler;
vm->error_handler = handler;
if (setjmp(vm->error_handler->error_jmp)) {
/* Ok, we had an error down there somewhere. */
if(vm->error_handler->thrown.type == JS_INTEGER) {
result = vm->error_handler->thrown.u.vinteger;
} else {
result = 0;
}
} else {
/* The main stuffs for the execute. */
/* Process constants. */
consts_offset = vm->num_consts;
anonymous_function_offset = vm->anonymous_function_next_id;
for (sect = 0; sect < bc->num_sects; sect++)
if (bc->sects[sect].type == JS_BCST_CONSTANTS) {
cp = bc->sects[sect].data;
for (ui = 0; ui < bc->sects[sect].length;) {
JSNode *c;
/* Check that we still have space for this constant. */
if (vm->num_consts >= vm->consts_alloc) {
// CHANGE alloc times to 16
vm->consts = js_realloc(vm, vm->consts, (vm->consts_alloc + 16)
* sizeof(JSNode));
vm->consts_alloc += 16;
}
c = &vm->consts[vm->num_consts++];
/* Process this constant. */
c->type = (JSNodeType) cp[ui++];
switch (c->type) {
case JS_NULL:
break;
case JS_BOOLEAN:
c->u.vboolean = cp[ui++];
break;
case JS_STRING:
c->u.vstring = js_vm_alloc(vm, sizeof(*c->u.vstring));
c->u.vstring->staticp = 1;
c->u.vstring->prototype = NULL;
JS_BC_READ_INT32(cp + ui, c->u.vstring->len);
ui += 4;
c->u.vstring->data = js_malloc(vm, c->u.vstring->len + 1);
memcpy(c->u.vstring->data, cp + ui, c->u.vstring->len);
c->u.vstring->data[c->u.vstring->len] = '\0';
ui += c->u.vstring->len;
break;
case JS_INTEGER:
JS_BC_READ_INT32(cp + ui, c->u.vinteger);
ui += 4;
break;
case JS_FLOAT:
memcpy(&c->u.vfloat, cp + ui, sizeof(JSFloat));
ui += sizeof(JSFloat);
break;
case JS_SYMBOL:
for (i = 0; cp[ui]; ui++, i++)
buf[i] = cp[ui];
buf[i] = '\0';
/* Eat the trailing '\0' from the data. */
ui++;
if (buf[0] == '.' && buf[1] == 'F' && buf[2] == ':')
//sprintf(buf + 3, "%u", vm->anonymous_function_next_id++);
vm->anonymous_function_next_id++;
/* Intern symbol. */
c->u.vsymbol = js_vm_intern(vm, buf);
break;
#if 0
case JS_BUILTIN:
/* Regular expression. */
{
unsigned char flags;
unsigned int length;
flags = cp[ui++];
JS_BC_READ_INT32 (cp + ui, length);
ui += 4;
js_builtin_RegExp_new (vm, cp + ui, length, flags, 1,
NULL, c);
ui += length;
}
break;
#endif
case JS_NAN:
/* Nothing here. */
break;
default:
case JS_IPTR:
#ifdef JS_RUNTIME_WARNING
sprintf(buf,
"js_vm_execute(): unknown constant type %d%s",
c->type, JS_HOST_LINE_BREAK);
#ifdef JS_IOSTREAM
js_iostream_write(vm->s_stderr, buf, strlen(buf));
js_iostream_flush(vm->s_stderr);
#else
fwrite(buf, strlen(buf), 1, stderr);
#endif
#endif
abort();
break;
}
}
/* All done with the constants. */
break;
}
/* Check how long the code section is. */
for (sect = 0; sect < bc->num_sects; sect++)
if (bc->sects[sect].type == JS_BCST_CODE) {
code_len = bc->sects[sect].length;
break;
}
/* Process symbol table. */
for (sect = 0; sect < bc->num_sects; sect++)
if (bc->sects[sect].type == JS_BCST_SYMTAB) {
JSSymtabEntry *se;
char buf[257];
cp = bc->sects[sect].data;
/* The number of symbols. */
JS_BC_READ_INT32(cp, num_symtab_entries);
symtab = js_calloc(vm, num_symtab_entries + 1, sizeof(*symtab));
/* Make the terminator by hand. */
symtab[num_symtab_entries].offset = code_len;
/* Enter symbols. */
se = symtab;
for (ui = 4; ui < bc->sects[sect].length; se++) {
for (i = 0; cp[ui]; ui++, i++)
buf[i] = cp[ui];
buf[i] = '\0';
se->name = js_strdup(vm, buf);
ui++;
JS_BC_READ_INT32(cp + ui, se->offset);
ui += 4;
}
break;
}
/* Check if we have debugging information. */
#ifdef JS_RUNTIME_DEBUG
debug_info = NULL;
debug_info_len = 0;
for (sect = 0; sect < bc->num_sects; sect++)
if (bc->sects[sect].type == JS_BCST_DEBUG) {
debug_info = bc->sects[sect].data;
debug_info_len = bc->sects[sect].length;
}
#endif
/* Clear error message and old exec result. */
#ifdef JS_RUNTIME_WARNING
vm->error[0] = '\0';
#endif
vm->exec_result.type = JS_UNDEFINED;
JS_PROFILING_ON();
/* Execute. */
result =
(*vm->dispatch_execute) (vm, bc, symtab, num_symtab_entries,
consts_offset,
anonymous_function_offset,
#ifdef JS_RUNTIME_DEBUG
debug_info, debug_info_len,
#endif
NULL, NULL, 0, NULL);
}
JS_PROFILING_OFF();
if (symtab) {
for (ui = 0; ui < num_symtab_entries; ui++)
js_free(symtab[ui].name);
js_free(symtab);
}
/* Pop all error handler frames from the handler chain. */
for (; vm->error_handler != saved_handler; vm->error_handler = handler) {
handler = vm->error_handler->next;
js_free(vm->error_handler);
}
/* Restore virtual machine's idea about the stack top. */
vm->sp = saved_sp;
return result;
}
int
js_vm_switch_exec (JSVirtualMachine *vm, JSByteCode *bc, JSSymtabEntry *symtab,
unsigned int num_symtab_entries,
unsigned int consts_offset,
unsigned char *debug_info, unsigned int debug_info_len,
char *func_name, JSNode *func,
unsigned int argc, JSNode *argv)
{
int i;
unsigned int ui;
Function *global_f = NULL;
Function *f;
unsigned char *code = NULL;
if (bc)
{
/* Executing byte-code. */
/* Find the code section. */
for (i = 0; i < bc->num_sects; i++)
if (bc->sects[i].type == JS_BCST_CODE)
code = bc->sects[i].data;
assert (code != NULL);
/* Enter all functions to the known functions of the VM. */
for (i = 0; i < num_symtab_entries; i++)
{
/* Link the code to our environment. */
f = link_code (vm, code + symtab[i].offset,
symtab[i + 1].offset - symtab[i].offset,
consts_offset);
f->name = js_strdup (vm, symtab[i].name);
if (strcmp (symtab[i].name, JS_GLOBAL_NAME) == 0)
global_f = f;
else
{
if (vm->verbose > 3)
printf ("VM: link: %s(): start=%d, length=%d\n",
symtab[i].name, symtab[i].offset,
symtab[i + 1].offset - symtab[i].offset);
ui = js_vm_intern (vm, symtab[i].name);
vm->globals[ui].type = JS_FUNC;
vm->globals[ui].u.vfunction = js_vm_make_function (vm, f);
}
}
}
else
{
JSNode *n;
/* Applying arguments to function. */
if (func_name)
{
/* Lookup function. */
JSSymbol sym;
sym = js_vm_intern (vm, func_name);
n = &vm->globals[sym];
if (n->type != JS_FUNC)
{
sprintf (vm->error, "undefined function `%s' in apply",
func_name);
return 0;
}
if (vm->verbose > 1)
printf ("VM: calling %s()\n", func_name);
}
else
{
/* Use the function the caller gave us. */
n = func;
if (n->type != JS_FUNC)
{
sprintf (vm->error, "illegal function in apply");
return 0;
}
if (vm->verbose > 1)
printf ("VM: calling function\n");
}
f = n->u.vfunction->implementation;
execute_code (vm, f, argc, argv);
}
if (global_f)
{
if (vm->verbose > 1)
printf ("VM: exec: %s\n", global_f->name);
/* Execute. */
execute_code (vm, global_f, 0, NULL);
}
return 1;
}
