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alloc.c
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// This file is a part of Julia. License is MIT: http://julialang.org/license
/*
object constructors
*/
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <assert.h>
#include "julia.h"
#include "julia_internal.h"
#ifdef __cplusplus
extern "C" {
#endif
JL_DLLEXPORT jl_value_t *jl_true;
JL_DLLEXPORT jl_value_t *jl_false;
jl_tvar_t *jl_typetype_tvar;
jl_datatype_t *jl_typetype_type;
jl_value_t *jl_ANY_flag;
jl_datatype_t *jl_typector_type;
jl_datatype_t *jl_array_type;
jl_typename_t *jl_array_typename;
jl_value_t *jl_array_uint8_type;
jl_value_t *jl_array_any_type=NULL;
jl_value_t *jl_array_symbol_type;
jl_datatype_t *jl_weakref_type;
jl_datatype_t *jl_ascii_string_type;
jl_datatype_t *jl_utf8_string_type;
jl_datatype_t *jl_expr_type;
jl_datatype_t *jl_globalref_type;
jl_datatype_t *jl_linenumbernode_type;
jl_datatype_t *jl_labelnode_type;
jl_datatype_t *jl_gotonode_type;
jl_datatype_t *jl_quotenode_type;
jl_datatype_t *jl_newvarnode_type;
jl_datatype_t *jl_topnode_type;
jl_datatype_t *jl_intrinsic_type;
jl_datatype_t *jl_method_type;
jl_datatype_t *jl_methtable_type;
jl_datatype_t *jl_typemap_entry_type;
jl_datatype_t *jl_typemap_level_type;
jl_datatype_t *jl_lambda_info_type;
jl_datatype_t *jl_module_type;
jl_datatype_t *jl_errorexception_type=NULL;
jl_datatype_t *jl_argumenterror_type;
jl_datatype_t *jl_typeerror_type;
jl_datatype_t *jl_methoderror_type;
jl_datatype_t *jl_loaderror_type;
jl_datatype_t *jl_initerror_type;
jl_datatype_t *jl_undefvarerror_type;
jl_datatype_t *jl_ref_type;
jl_datatype_t *jl_pointer_type;
jl_datatype_t *jl_void_type;
jl_datatype_t *jl_voidpointer_type;
jl_value_t *jl_an_empty_cell=NULL;
jl_value_t *jl_stackovf_exception;
#ifdef SEGV_EXCEPTION
jl_value_t *jl_segv_exception;
#endif
JL_DLLEXPORT jl_value_t *jl_diverror_exception;
JL_DLLEXPORT jl_value_t *jl_domain_exception;
JL_DLLEXPORT jl_value_t *jl_overflow_exception;
JL_DLLEXPORT jl_value_t *jl_inexact_exception;
JL_DLLEXPORT jl_value_t *jl_undefref_exception;
jl_value_t *jl_interrupt_exception;
jl_datatype_t *jl_boundserror_type;
jl_value_t *jl_memory_exception;
jl_value_t *jl_readonlymemory_exception;
union jl_typemap_t jl_cfunction_list;
jl_sym_t *call_sym; jl_sym_t *dots_sym;
jl_sym_t *module_sym; jl_sym_t *slot_sym;
jl_sym_t *export_sym; jl_sym_t *import_sym;
jl_sym_t *importall_sym; jl_sym_t *toplevel_sym;
jl_sym_t *quote_sym; jl_sym_t *amp_sym;
jl_sym_t *top_sym; jl_sym_t *colons_sym;
jl_sym_t *line_sym; jl_sym_t *jl_incomplete_sym;
// head symbols for each expression type
jl_sym_t *goto_sym; jl_sym_t *goto_ifnot_sym;
jl_sym_t *label_sym; jl_sym_t *return_sym;
jl_sym_t *lambda_sym; jl_sym_t *assign_sym;
jl_sym_t *null_sym; jl_sym_t *body_sym;
jl_sym_t *method_sym;
jl_sym_t *enter_sym; jl_sym_t *leave_sym;
jl_sym_t *exc_sym; jl_sym_t *error_sym;
jl_sym_t *static_typeof_sym;
jl_sym_t *new_sym; jl_sym_t *using_sym;
jl_sym_t *const_sym; jl_sym_t *thunk_sym;
jl_sym_t *anonymous_sym; jl_sym_t *underscore_sym;
jl_sym_t *abstracttype_sym; jl_sym_t *bitstype_sym;
jl_sym_t *compositetype_sym; jl_sym_t *type_goto_sym;
jl_sym_t *global_sym; jl_sym_t *list_sym;
jl_sym_t *dot_sym; jl_sym_t *newvar_sym;
jl_sym_t *boundscheck_sym; jl_sym_t *inbounds_sym;
jl_sym_t *copyast_sym; jl_sym_t *fastmath_sym;
jl_sym_t *pure_sym; jl_sym_t *simdloop_sym;
jl_sym_t *meta_sym; jl_sym_t *compiler_temp_sym;
jl_sym_t *inert_sym; jl_sym_t *vararg_sym;
jl_sym_t *unused_sym; jl_sym_t *static_parameter_sym;
typedef struct {
int64_t a;
int64_t b;
} bits128_t;
// Note that this function updates len
static jl_value_t *jl_new_bits_internal(jl_value_t *dt, void *data, size_t *len)
{
if (jl_is_ntuple_type(dt)) {
jl_value_t *lenvar = jl_tparam0(dt);
jl_value_t *elty = jl_tparam1(dt);
assert(jl_is_datatype(elty));
size_t alignment = ((jl_datatype_t*)elty)->alignment;
*len = LLT_ALIGN((*len), alignment);
assert(jl_is_long(lenvar));
size_t l = jl_unbox_long(lenvar);
size_t nb = l*LLT_ALIGN(jl_datatype_size(elty), alignment);
jl_value_t *v = (jl_value_t*)newobj(dt, NWORDS(nb));
memcpy(jl_data_ptr(v), data, nb);
return v;
}
assert(jl_is_datatype(dt));
jl_datatype_t *bt = (jl_datatype_t*)dt;
size_t nb = jl_datatype_size(bt);
if (nb == 0)
return jl_new_struct_uninit(bt);
*len = LLT_ALIGN(*len, bt->alignment);
data = (char*)data + (*len);
*len += nb;
if (bt == jl_uint8_type) return jl_box_uint8(*(uint8_t*)data);
if (bt == jl_int64_type) return jl_box_int64(*(int64_t*)data);
if (bt == jl_bool_type) return (*(int8_t*)data) ? jl_true:jl_false;
if (bt == jl_int32_type) return jl_box_int32(*(int32_t*)data);
if (bt == jl_float64_type) return jl_box_float64(*(double*)data);
jl_value_t *v = (jl_value_t*)newobj((jl_value_t*)bt, NWORDS(nb));
switch (nb) {
case 1: *(int8_t*) jl_data_ptr(v) = *(int8_t*)data; break;
case 2: *(int16_t*) jl_data_ptr(v) = *(int16_t*)data; break;
case 4: *(int32_t*) jl_data_ptr(v) = *(int32_t*)data; break;
case 8: *(int64_t*) jl_data_ptr(v) = *(int64_t*)data; break;
case 16: *(bits128_t*)jl_data_ptr(v) = *(bits128_t*)data; break;
default: memcpy(jl_data_ptr(v), data, nb);
}
return v;
}
JL_DLLEXPORT jl_value_t *jl_new_bits(jl_value_t *bt, void *data)
{
size_t len = 0;
return jl_new_bits_internal(bt, data, &len);
}
void jl_assign_bits(void *dest, jl_value_t *bits)
{
size_t nb = jl_datatype_size(jl_typeof(bits));
if (nb == 0) return;
switch (nb) {
case 1: *(int8_t*)dest = *(int8_t*)jl_data_ptr(bits); break;
case 2: *(int16_t*)dest = *(int16_t*)jl_data_ptr(bits); break;
case 4: *(int32_t*)dest = *(int32_t*)jl_data_ptr(bits); break;
case 8: *(int64_t*)dest = *(int64_t*)jl_data_ptr(bits); break;
case 16: *(bits128_t*)dest = *(bits128_t*)jl_data_ptr(bits); break;
default: memcpy(dest, jl_data_ptr(bits), nb);
}
}
JL_DLLEXPORT int jl_field_index(jl_datatype_t *t, jl_sym_t *fld, int err)
{
jl_svec_t *fn = t->name->names;
for(size_t i=0; i < jl_svec_len(fn); i++) {
if (jl_svecref(fn,i) == (jl_value_t*)fld) {
return (int)i;
}
}
if (err)
jl_errorf("type %s has no field %s", jl_symbol_name(t->name->name),
jl_symbol_name(fld));
return -1;
}
JL_DLLEXPORT jl_value_t *jl_get_nth_field(jl_value_t *v, size_t i)
{
jl_datatype_t *st = (jl_datatype_t*)jl_typeof(v);
assert(i < jl_datatype_nfields(st));
size_t offs = jl_field_offset(st,i);
if (jl_field_isptr(st,i)) {
return *(jl_value_t**)((char*)v + offs);
}
return jl_new_bits(jl_field_type(st,i), (char*)v + offs);
}
JL_DLLEXPORT jl_value_t *jl_get_nth_field_checked(jl_value_t *v, size_t i)
{
jl_datatype_t *st = (jl_datatype_t*)jl_typeof(v);
if (i >= jl_datatype_nfields(st))
jl_bounds_error_int(v, i+1);
size_t offs = jl_field_offset(st,i);
if (jl_field_isptr(st,i)) {
jl_value_t *fval = *(jl_value_t**)((char*)v + offs);
if (fval == NULL)
jl_throw(jl_undefref_exception);
return fval;
}
return jl_new_bits(jl_field_type(st,i), (char*)v + offs);
}
JL_DLLEXPORT void jl_set_nth_field(jl_value_t *v, size_t i, jl_value_t *rhs)
{
jl_datatype_t *st = (jl_datatype_t*)jl_typeof(v);
size_t offs = jl_field_offset(st,i);
if (jl_field_isptr(st,i)) {
*(jl_value_t**)((char*)v + offs) = rhs;
if (rhs != NULL) jl_gc_wb(v, rhs);
}
else {
jl_assign_bits((char*)v + offs, rhs);
}
}
JL_DLLEXPORT int jl_field_isdefined(jl_value_t *v, size_t i)
{
jl_datatype_t *st = (jl_datatype_t*)jl_typeof(v);
size_t offs = jl_field_offset(st,i);
if (jl_field_isptr(st,i)) {
return *(jl_value_t**)((char*)v + offs) != NULL;
}
return 1;
}
JL_DLLEXPORT jl_value_t *jl_new_struct(jl_datatype_t *type, ...)
{
if (type->instance != NULL) return type->instance;
va_list args;
size_t nf = jl_datatype_nfields(type);
va_start(args, type);
jl_value_t *jv = newstruct(type);
for(size_t i=0; i < nf; i++) {
jl_set_nth_field(jv, i, va_arg(args, jl_value_t*));
}
va_end(args);
return jv;
}
JL_DLLEXPORT jl_value_t *jl_new_structv(jl_datatype_t *type, jl_value_t **args,
uint32_t na)
{
if (type->instance != NULL) return type->instance;
size_t nf = jl_datatype_nfields(type);
jl_value_t *jv = newstruct(type);
for(size_t i=0; i < na; i++) {
jl_set_nth_field(jv, i, args[i]);
}
for(size_t i=na; i < nf; i++) {
if (jl_field_isptr(type, i)) {
*(jl_value_t**)((char*)jl_data_ptr(jv)+jl_field_offset(type,i)) = NULL;
}
}
return jv;
}
JL_DLLEXPORT jl_value_t *jl_new_struct_uninit(jl_datatype_t *type)
{
if (type->instance != NULL) return type->instance;
jl_value_t *jv = newstruct(type);
if (type->size > 0)
memset(jl_data_ptr(jv), 0, type->size);
return jv;
}
extern jl_value_t *jl_builtin_getfield;
jl_value_t *jl_resolve_globals(jl_value_t *expr, jl_lambda_info_t *lam)
{
if (jl_is_symbol(expr)) {
if (lam->def->module == NULL)
return expr;
return jl_module_globalref(lam->def->module, (jl_sym_t*)expr);
}
else if (jl_is_expr(expr)) {
jl_expr_t *e = (jl_expr_t*)expr;
if (jl_is_toplevel_only_expr(expr) || e->head == const_sym || e->head == copyast_sym ||
e->head == global_sym || e->head == quote_sym || e->head == inert_sym ||
e->head == line_sym || e->head == meta_sym || e->head == inbounds_sym ||
e->head == boundscheck_sym || e->head == simdloop_sym) {
}
else {
if (e->head == call_sym && jl_expr_nargs(e) == 3 && jl_is_quotenode(jl_exprarg(e,2)) &&
lam->def->module != NULL) {
// replace getfield(module_expr, :sym) with GlobalRef
jl_value_t *s = jl_fieldref(jl_exprarg(e,2),0);
jl_value_t *fe = jl_exprarg(e,0);
if (jl_is_symbol(s) && jl_is_topnode(fe)) {
jl_value_t *f = jl_static_eval(fe, NULL, lam->def->module, lam, 0, 0);
if (f == jl_builtin_getfield) {
jl_value_t *me = jl_exprarg(e,1);
if (jl_is_topnode(me) ||
(jl_is_symbol(me) && jl_binding_resolved_p(lam->def->module, (jl_sym_t*)me))) {
jl_value_t *m = jl_static_eval(me, NULL, lam->def->module, lam, 0, 0);
if (m && jl_is_module(m))
return jl_module_globalref((jl_module_t*)m, (jl_sym_t*)s);
}
}
}
}
size_t i = 0;
if (e->head == method_sym || e->head == abstracttype_sym || e->head == compositetype_sym ||
e->head == bitstype_sym || e->head == module_sym)
i++;
for(; i < jl_array_len(e->args); i++) {
jl_exprargset(e, i, jl_resolve_globals(jl_exprarg(e,i), lam));
}
}
}
return expr;
}
void jl_lambda_info_set_ast(jl_lambda_info_t *li, jl_value_t *ast)
{
assert(jl_is_expr(ast));
jl_array_t *body = jl_lam_body((jl_expr_t*)ast)->args;
li->code = body; jl_gc_wb(li, li->code);
if (has_meta(body, pure_sym))
li->pure = 1;
jl_array_t *vis = jl_lam_vinfo((jl_expr_t*)ast);
size_t nslots = jl_array_len(vis);
jl_value_t *gensym_types = jl_lam_gensyms((jl_expr_t*)ast);
size_t ngensym = (jl_is_array(gensym_types) ? jl_array_len(gensym_types) : jl_unbox_long(gensym_types));
li->slotnames = jl_alloc_cell_1d(nslots);
jl_gc_wb(li, li->slotnames);
li->slottypes = jl_nothing;
li->slotflags = jl_alloc_array_1d(jl_array_uint8_type, nslots);
jl_gc_wb(li, li->slotflags);
li->gensymtypes = jl_box_long(ngensym);
jl_gc_wb(li, li->gensymtypes);
int i;
for(i=0; i < nslots; i++) {
jl_value_t *vi = jl_cellref(vis, i);
jl_sym_t *name = (jl_sym_t*)jl_cellref(vi, 0);
assert(jl_is_symbol(name));
char *str = jl_symbol_name(name);
if (i > 0 && name != unused_sym) {
if (str[0] == '#') {
// convention for renamed variables: #...#original_name
char *nxt = strchr(str + 1, '#');
if (nxt)
name = jl_symbol(nxt+1);
else if (str[1] == 's') // compiler-generated temporaries, #sXXX
name = compiler_temp_sym;
}
}
jl_cellset(li->slotnames, i, name);
jl_array_uint8_set(li->slotflags, i, jl_unbox_long(jl_cellref(vi, 2)));
}
jl_array_t *args = jl_lam_args((jl_expr_t*)ast);
size_t narg = jl_array_len(args);
li->nargs = narg;
li->isva = narg > 0 && jl_is_rest_arg(jl_cellref(args, narg - 1));
}
JL_DLLEXPORT jl_lambda_info_t *jl_new_lambda_info_uninit(jl_svec_t *sparam_syms)
{
jl_lambda_info_t *li =
(jl_lambda_info_t*)newobj((jl_value_t*)jl_lambda_info_type,
NWORDS(sizeof(jl_lambda_info_t)));
li->code = NULL;
li->slotnames = li->slotflags = NULL;
li->slottypes = li->gensymtypes = NULL;
li->rettype = (jl_value_t*)jl_any_type;
li->sparam_syms = sparam_syms;
li->sparam_vals = jl_emptysvec;
li->fptr = NULL;
li->jlcall_api = 0;
li->compile_traced = 0;
li->functionObjectsDecls.functionObject = NULL;
li->functionObjectsDecls.specFunctionObject = NULL;
li->functionID = 0;
li->specFunctionID = 0;
li->specTypes = NULL;
li->unspecialized_ducttape = NULL;
li->inferred = 0;
li->inInference = 0;
li->inCompile = 0;
li->def = NULL;
li->pure = 0;
return li;
}
static jl_lambda_info_t *jl_instantiate_staged(jl_method_t *generator, jl_tupletype_t *tt, jl_svec_t *env)
{
size_t i, l;
jl_expr_t *ex = NULL;
jl_value_t *linenum = NULL;
jl_svec_t *sparam_vals = env;
jl_lambda_info_t *func = generator->lambda_template;
JL_GC_PUSH4(&ex, &linenum, &sparam_vals, &func);
int last_in = in_pure_callback;
assert(jl_svec_len(func->sparam_syms) == jl_svec_len(sparam_vals));
JL_TRY {
in_pure_callback = 1;
ex = jl_exprn(lambda_sym, 2);
int nargs = func->nargs;
jl_array_t *argnames = jl_alloc_cell_1d(nargs);
jl_cellset(ex->args, 0, argnames);
for (i = 0; i < nargs; i++)
jl_cellset(argnames, i, jl_cellref(func->slotnames, i));
jl_expr_t *scopeblock = jl_exprn(jl_symbol("scope-block"), 1);
jl_cellset(ex->args, 1, scopeblock);
jl_expr_t *body = jl_exprn(jl_symbol("block"), 2);
jl_cellset(((jl_expr_t*)jl_exprarg(ex,1))->args, 0, body);
linenum = jl_box_long(generator->line);
jl_value_t *linenode = jl_new_struct(jl_linenumbernode_type, generator->file, linenum);
jl_cellset(body->args, 0, linenode);
// invoke code generator
assert(jl_nparams(tt) == jl_array_len(argnames) ||
(func->isva && (jl_nparams(tt) >= jl_array_len(argnames) - 1)));
jl_cellset(body->args, 1,
jl_call_unspecialized(sparam_vals, func, jl_svec_data(tt->parameters), jl_nparams(tt)));
if (func->sparam_syms != jl_emptysvec) {
// mark this function as having the same static parameters as the generator
size_t i, nsp = jl_svec_len(func->sparam_syms);
jl_expr_t *newast = jl_exprn(jl_symbol("with-static-parameters"), nsp + 1);
jl_exprarg(newast, 0) = (jl_value_t*)ex;
// (with-static-parameters func_expr sp_1 sp_2 ...)
for (i = 0; i < nsp; i++)
jl_exprarg(newast, i+1) = jl_svecref(func->sparam_syms, i);
ex = newast;
}
// need to eval macros in the right module, but not give a warning for the `eval` call unless that results in a call to `eval`
func = (jl_lambda_info_t*)jl_toplevel_eval_in_warn(generator->module, (jl_value_t*)ex, 1);
// finish marking this as a specialization of the generator
func->isva = generator->lambda_template->isva;
func->def = generator;
jl_gc_wb(func, generator);
func->sparam_vals = env;
jl_gc_wb(func, env);
func->specTypes = tt;
jl_gc_wb(func, tt);
jl_array_t *stmts = func->code;
for(i = 0, l = jl_array_len(stmts); i < l; i++) {
jl_cellset(stmts, i, jl_resolve_globals(jl_cellref(stmts, i), func));
}
in_pure_callback = last_in;
}
JL_CATCH {
in_pure_callback = last_in;
jl_rethrow();
}
JL_GC_POP();
return func;
}
static jl_lambda_info_t *jl_copy_lambda(jl_lambda_info_t *linfo)
{
assert(linfo->sparam_vals == jl_emptysvec);
jl_lambda_info_t *new_linfo = jl_new_lambda_info_uninit(linfo->sparam_syms);
new_linfo->code = linfo->code;
new_linfo->slotnames = linfo->slotnames;
new_linfo->slottypes = linfo->slottypes;
new_linfo->slotflags = linfo->slotflags;
new_linfo->gensymtypes = linfo->gensymtypes;
new_linfo->sparam_vals = linfo->sparam_vals;
new_linfo->pure = linfo->pure;
new_linfo->nargs = linfo->nargs;
new_linfo->isva = linfo->isva;
new_linfo->rettype = linfo->rettype;
return new_linfo;
}
// return a new lambda-info that has some extra static parameters merged in
JL_DLLEXPORT jl_lambda_info_t *jl_get_specialized(jl_method_t *m, jl_tupletype_t *types, jl_svec_t *sp)
{
jl_lambda_info_t *linfo = m->lambda_template;
jl_lambda_info_t *new_linfo;
assert(jl_svec_len(linfo->sparam_syms) == jl_svec_len(sp) || sp == jl_emptysvec);
if (!m->isstaged) {
new_linfo = jl_copy_lambda(linfo);
new_linfo->specTypes = types;
new_linfo->def = m;
new_linfo->sparam_vals = sp;
if (jl_options.compile_enabled == JL_OPTIONS_COMPILE_OFF ||
jl_options.compile_enabled == JL_OPTIONS_COMPILE_MIN) {
// copy fptr from the template method definition
new_linfo->fptr = linfo->fptr;
new_linfo->jlcall_api = linfo->jlcall_api;
if (jl_options.compile_enabled == JL_OPTIONS_COMPILE_OFF && new_linfo->fptr == NULL) {
jl_printf(JL_STDERR,"code missing for ");
jl_static_show(JL_STDERR, (jl_value_t*)new_linfo);
jl_printf(JL_STDERR, " sysimg may not have been built with --compile=all\n");
}
}
}
else {
new_linfo = jl_instantiate_staged(m, types, sp);
}
return new_linfo;
}
JL_DLLEXPORT void jl_method_init_properties(jl_method_t *m)
{
jl_lambda_info_t *li = m->lambda_template;
jl_value_t *body1 = skip_meta(li->code);
if (jl_is_linenode(body1)) {
m->file = jl_linenode_file(body1);
m->line = jl_linenode_line(body1);
}
else if (jl_is_expr(body1) && ((jl_expr_t*)body1)->head == line_sym) {
m->file = (jl_sym_t*)jl_exprarg(body1, 1);
m->line = jl_unbox_long(jl_exprarg(body1, 0));
}
int i;
uint8_t called=0;
for(i=1; i < li->nargs && i <= 8; i++) {
jl_value_t *ai = jl_cellref(li->slotnames,i);
if (ai == (jl_value_t*)unused_sym) continue;
if (jl_array_uint8_ref(li->slotflags,i)&64)
called |= (1<<(i-1));
}
m->called = called;
}
JL_DLLEXPORT jl_method_t *jl_new_method_uninit(void)
{
jl_method_t *m =
(jl_method_t*)newobj((jl_value_t*)jl_method_type,
NWORDS(sizeof(jl_method_t)));
m->tfunc.unknown = jl_nothing;
m->roots = NULL;
m->module = jl_current_module;
m->lambda_template = NULL;
m->specializations = NULL;
m->name = NULL;
m->file = null_sym;
m->line = 0;
m->called = 0xff;
m->invokes.unknown = NULL;
m->isstaged = 0;
m->needs_sparam_vals_ducttape = 2;
m->traced = 0;
return m;
}
jl_method_t *jl_new_method(jl_lambda_info_t *definition, jl_sym_t *name, jl_tupletype_t *sig, int isstaged)
{
assert(definition->code);
jl_method_t *m = jl_new_method_uninit();
m->isstaged = isstaged;
m->name = name;
JL_GC_PUSH1(&m);
// the front end may add this lambda to multiple methods; make a copy if so
jl_method_t *oldm = definition->def;
int reused = oldm != NULL;
if (reused)
definition = jl_copy_lambda(definition);
definition->specTypes = sig;
m->lambda_template = definition;
jl_gc_wb(m, definition);
definition->def = m;
jl_gc_wb(definition, m);
if (reused) {
m->file = oldm->file;
m->line = oldm->line;
m->called = oldm->called;
}
else {
jl_array_t *stmts = definition->code;
int i, l;
for(i = 0, l = jl_array_len(stmts); i < l; i++) {
jl_cellset(stmts, i, jl_resolve_globals(jl_cellref(stmts, i), definition));
}
jl_method_init_properties(m);
}
JL_GC_POP();
return m;
}
// symbols --------------------------------------------------------------------
static jl_mutex_t symbol_table_lock;
static jl_sym_t *volatile symtab = NULL;
static uintptr_t hash_symbol(const char *str, size_t len)
{
return memhash(str, len) ^ ~(uintptr_t)0/3*2;
}
#define SYM_POOL_SIZE 524288
static size_t symbol_nbytes(size_t len)
{
return (sizeof_jl_taggedvalue_t + sizeof(jl_sym_t) + len + 1 + 7) & -8;
}
static jl_sym_t *mk_symbol(const char *str, size_t len)
{
#ifndef MEMDEBUG
static char *sym_pool = NULL;
static char *pool_ptr = NULL;
#endif
jl_sym_t *sym;
size_t nb = symbol_nbytes(len);
if (nb >= SYM_POOL_SIZE) {
jl_exceptionf(jl_argumenterror_type, "Symbol length exceeds maximum length");
}
#ifdef MEMDEBUG
sym = (jl_sym_t*)jl_valueof(malloc(nb));
#else
if (sym_pool == NULL || pool_ptr+nb > sym_pool+SYM_POOL_SIZE) {
sym_pool = (char*)malloc(SYM_POOL_SIZE);
pool_ptr = sym_pool;
}
sym = (jl_sym_t*)jl_valueof(pool_ptr);
pool_ptr += nb;
#endif
jl_set_typeof(sym, jl_sym_type);
sym->left = sym->right = NULL;
sym->hash = hash_symbol(str, len);
memcpy(jl_symbol_name(sym), str, len);
jl_symbol_name(sym)[len] = 0;
return sym;
}
static jl_sym_t *symtab_lookup(jl_sym_t *volatile *ptree, const char *str,
size_t len, jl_sym_t *volatile **slot)
{
jl_sym_t *node = jl_atomic_load_acquire(ptree);
uintptr_t h = hash_symbol(str, len);
// Tree nodes sorted by major key of (int(hash)) and minor key of (str).
while (node != NULL) {
intptr_t x = (intptr_t)(h - node->hash);
if (x == 0) {
x = strncmp(str, jl_symbol_name(node), len);
if (x == 0 && jl_symbol_name(node)[len] == 0) {
if (slot != NULL)
*slot = ptree;
return node;
}
}
if (x < 0)
ptree = &node->left;
else
ptree = &node->right;
node = jl_atomic_load_acquire(ptree);
}
if (slot != NULL)
*slot = ptree;
return node;
}
static jl_sym_t *_jl_symbol(const char *str, size_t len)
{
jl_sym_t *volatile *slot;
jl_sym_t *node = symtab_lookup(&symtab, str, len, &slot);
if (node == NULL) {
JL_LOCK(&symbol_table_lock); // Might GC
// Someone might have updated it, check and look up again
if (*slot != NULL && (node = symtab_lookup(slot, str, len, &slot))) {
JL_UNLOCK(&symbol_table_lock);
return node;
}
node = mk_symbol(str, len);
jl_atomic_store_release(slot, node);
JL_UNLOCK(&symbol_table_lock);
}
return node;
}
JL_DLLEXPORT jl_sym_t *jl_symbol(const char *str)
{
return _jl_symbol(str, strlen(str));
}
JL_DLLEXPORT jl_sym_t *jl_symbol_lookup(const char *str)
{
return symtab_lookup(&symtab, str, strlen(str), NULL);
}
JL_DLLEXPORT jl_sym_t *jl_symbol_n(const char *str, int32_t len)
{
if (memchr(str, 0, len))
jl_exceptionf(jl_argumenterror_type, "Symbol name may not contain \\0");
return _jl_symbol(str, len);
}
JL_DLLEXPORT jl_sym_t *jl_get_root_symbol(void)
{
return symtab;
}
static uint32_t gs_ctr = 0; // TODO: per-thread
uint32_t jl_get_gs_ctr(void) { return gs_ctr; }
void jl_set_gs_ctr(uint32_t ctr) { gs_ctr = ctr; }
JL_DLLEXPORT jl_sym_t *jl_gensym(void)
{
static char name[16];
char *n;
n = uint2str(&name[2], sizeof(name)-2, gs_ctr, 10);
*(--n) = '#'; *(--n) = '#';
gs_ctr++;
return jl_symbol(n);
}
JL_DLLEXPORT jl_sym_t *jl_tagged_gensym(const char *str, int32_t len)
{
static char gs_name[14];
if (symbol_nbytes(len) >= SYM_POOL_SIZE)
jl_exceptionf(jl_argumenterror_type, "Symbol length exceeds maximum");
if (memchr(str, 0, len))
jl_exceptionf(jl_argumenterror_type, "Symbol name may not contain \\0");
char *name = (char*) (len >= 256 ? malloc(sizeof(gs_name)+len+3) :
alloca(sizeof(gs_name)+len+3));
char *n;
name[0] = '#'; name[1] = '#'; name[2+len] = '#';
memcpy(name+2, str, len);
n = uint2str(gs_name, sizeof(gs_name), gs_ctr, 10);
memcpy(name+3+len, n, sizeof(gs_name)-(n-gs_name));
gs_ctr++;
jl_sym_t *sym = _jl_symbol(name, len+3+sizeof(gs_name)-(n-gs_name)-1);
if (len >= 256) free(name);
return sym;
}
// allocating types -----------------------------------------------------------
jl_sym_t *jl_demangle_typename(jl_sym_t *s)
{
char *n = jl_symbol_name(s);
if (n[0] != '#')
return s;
char *end = strrchr(n, '#');
int32_t len;
if (end == n || end == n+1)
len = strlen(n) - 1;
else
len = (end-n) - 1;
return jl_symbol_n(&n[1], len);
}
JL_DLLEXPORT jl_methtable_t *jl_new_method_table(jl_sym_t *name, jl_module_t *module)
{
jl_methtable_t *mt = (jl_methtable_t*)jl_gc_allocobj(sizeof(jl_methtable_t));
jl_set_typeof(mt, jl_methtable_type);
mt->name = jl_demangle_typename(name);
mt->module = module;
mt->defs.unknown = jl_nothing;
mt->cache.unknown = jl_nothing;
mt->max_args = 0;
mt->kwsorter = NULL;
#ifdef JL_GF_PROFILE
mt->ncalls = 0;
#endif
return mt;
}
JL_DLLEXPORT jl_typename_t *jl_new_typename_in(jl_sym_t *name, jl_module_t *module)
{
jl_typename_t *tn=(jl_typename_t*)newobj((jl_value_t*)jl_typename_type, NWORDS(sizeof(jl_typename_t)));
tn->name = name;
tn->module = module;
tn->primary = NULL;
tn->cache = jl_emptysvec;
tn->linearcache = jl_emptysvec;
tn->names = NULL;
tn->uid = jl_assign_type_uid();
tn->mt = NULL;
JL_GC_PUSH1(&tn);
tn->mt = NULL;
JL_GC_POP();
return tn;
}
JL_DLLEXPORT jl_typename_t *jl_new_typename(jl_sym_t *name)
{
return jl_new_typename_in(name, jl_current_module);
}
jl_datatype_t *jl_new_abstracttype(jl_value_t *name, jl_datatype_t *super,
jl_svec_t *parameters)
{
jl_datatype_t *dt = jl_new_datatype((jl_sym_t*)name, super, parameters, jl_emptysvec, jl_emptysvec, 1, 0, 0);
dt->pointerfree = 0;
return dt;
}
JL_DLLEXPORT jl_datatype_t *jl_new_uninitialized_datatype(size_t nfields, int8_t fielddesc_type)
{
// fielddesc_type is specified manually for builtin types
// and is (will be) calculated automatically for user defined types.
uint32_t fielddesc_size = jl_fielddesc_size(fielddesc_type);
jl_datatype_t *t = (jl_datatype_t*)
newobj((jl_value_t*)jl_datatype_type,
NWORDS(sizeof(jl_datatype_t) + nfields * fielddesc_size));
// fielddesc_type should only be assigned here. It can cause data
// corruption otherwise.
t->fielddesc_type = fielddesc_type;
t->nfields = nfields;
t->haspadding = 0;
t->pointerfree = 0;
t->depth = 0;
return t;
}
// Determine if homogeneous tuple with fields of type t will have
// a special alignment beyond normal Julia rules.
// Return special alignment if one exists, 0 if normal alignment rules hold.
// A non-zero result *must* match the LLVM rules for a vector type <nfields x t>.
// For sake of Ahead-Of-Time (AOT) compilation, this routine has to work
// without LLVM being available.
unsigned jl_special_vector_alignment(size_t nfields, jl_value_t *t) {
if (!is_vecelement_type(t))
return 0;
if (nfields>16 || (1<<nfields & 0x1157C) == 0)
// Number of fields is not 2, 3, 4, 5, 6, 8, 10, 12, or 16.
return 0;
assert(jl_datatype_nfields(t)==1);
jl_value_t *ty = jl_field_type(t, 0);
if( !jl_is_bitstype(ty) )
// LLVM requires that a vector element be a primitive type.
// LLVM allows pointer types as vector elements, but until a
// motivating use case comes up for Julia, we reject pointers.
return 0;
size_t elsz = jl_datatype_size(ty);
if (elsz>8 || (1<<elsz & 0x116) == 0)
// Element size is not 1, 2, 4, or 8.
return 0;
size_t size = nfields*elsz;
// LLVM's alignment rule for vectors seems to be to round up to
// a power of two, even if that's overkill for the target hardware.
size_t alignment=1;
for( ; size>alignment; alignment*=2 )
continue;
return alignment;
}
void jl_compute_field_offsets(jl_datatype_t *st)
{
size_t sz = 0, alignm = 1;
int ptrfree = 1;
int homogeneous = 1;
jl_value_t *lastty = NULL;
assert(0 <= st->fielddesc_type && st->fielddesc_type <= 2);
uint64_t max_offset = (((uint64_t)1) <<
(1 << (3 + st->fielddesc_type))) - 1;
uint64_t max_size = max_offset >> 1;
for(size_t i=0; i < jl_datatype_nfields(st); i++) {
jl_value_t *ty = jl_field_type(st, i);
size_t fsz, al;
if (jl_isbits(ty) && jl_is_leaf_type(ty)) {
fsz = jl_datatype_size(ty);
// Should never happen
if (__unlikely(fsz > max_size))
jl_throw(jl_overflow_exception);
al = ((jl_datatype_t*)ty)->alignment;
jl_field_setisptr(st, i, 0);
if (((jl_datatype_t*)ty)->haspadding)
st->haspadding = 1;
}
else {
fsz = sizeof(void*);
if (fsz > MAX_ALIGN)
fsz = MAX_ALIGN;
al = fsz;
jl_field_setisptr(st, i, 1);
ptrfree = 0;
}
if (al != 0) {
size_t alsz = LLT_ALIGN(sz, al);
if (sz & (al - 1))
st->haspadding = 1;
sz = alsz;
if (al > alignm)
alignm = al;
}
homogeneous &= lastty==NULL || lastty==ty;
lastty = ty;
jl_field_setoffset(st, i, sz);
jl_field_setsize(st, i, fsz);
if (__unlikely(max_offset - sz < fsz))
jl_throw(jl_overflow_exception);
sz += fsz;
}
if (homogeneous && lastty!=NULL && jl_is_tuple_type(st)) {
// Some tuples become LLVM vectors with stronger alignment than what was calculated above.
unsigned al = jl_special_vector_alignment(jl_datatype_nfields(st), lastty);
assert(al % alignm == 0);
if (al)
alignm = al;
}
st->alignment = alignm;
st->size = LLT_ALIGN(sz, alignm);
if (st->size > sz)
st->haspadding = 1;
st->pointerfree = ptrfree && !st->abstract;
}
extern int jl_boot_file_loaded;
JL_DLLEXPORT jl_datatype_t *jl_new_datatype(jl_sym_t *name, jl_datatype_t *super,
jl_svec_t *parameters,
jl_svec_t *fnames, jl_svec_t *ftypes,
int abstract, int mutabl,
int ninitialized)
{
jl_datatype_t *t=NULL;
jl_typename_t *tn=NULL;
JL_GC_PUSH2(&t, &tn);
if (!jl_boot_file_loaded && jl_is_symbol(name)) {
// hack to avoid making two versions of basic types needed
// during bootstrapping
if (!strcmp(jl_symbol_name((jl_sym_t*)name), "Int32"))
t = jl_int32_type;
else if (!strcmp(jl_symbol_name((jl_sym_t*)name), "Int64"))
t = jl_int64_type;
else if (!strcmp(jl_symbol_name((jl_sym_t*)name), "Bool"))
t = jl_bool_type;
else if (!strcmp(jl_symbol_name((jl_sym_t*)name), "UInt8"))
t = jl_uint8_type;
}
if (t == NULL)
t = jl_new_uninitialized_datatype(jl_svec_len(fnames), 2); // TODO
else
tn = t->name;
// init before possibly calling jl_new_typename
t->super = super;
if (super != NULL) jl_gc_wb(t, t->super);
t->parameters = parameters;
jl_gc_wb(t, t->parameters);
t->types = ftypes;
if (ftypes != NULL) jl_gc_wb(t, t->types);
t->abstract = abstract;
t->mutabl = mutabl;
t->pointerfree = 0;
t->ninitialized = ninitialized;
t->instance = NULL;
t->struct_decl = NULL;
t->ditype = NULL;
t->size = 0;
t->alignment = 1;
t->haspadding = 0;
if (tn == NULL) {
t->name = NULL;
if (jl_is_typename(name)) {
tn = (jl_typename_t*)name;
}
else {
tn = jl_new_typename((jl_sym_t*)name);
if (!abstract) {
tn->mt = jl_new_method_table(name, jl_current_module);
jl_gc_wb(tn, tn->mt);
}
}
t->name = tn;
jl_gc_wb(t, t->name);
}
t->name->names = fnames;
jl_gc_wb(t->name, t->name->names);
if (t->name->primary == NULL) {
t->name->primary = (jl_value_t*)t;
jl_gc_wb(t->name, t);
}
if (abstract || jl_svec_len(parameters) > 0) {
t->uid = 0;
}
else {
t->uid = jl_assign_type_uid();
if (t->types != NULL)
jl_compute_field_offsets(t);
}
JL_GC_POP();
return t;
}