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dump.c
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/*
saving and restoring system images
*/
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifdef _OS_WINDOWS_
#include <malloc.h>
#endif
#include "julia.h"
#include "julia_internal.h"
#include "builtin_proto.h"
#ifdef __cplusplus
extern "C" {
#endif
static htable_t ser_tag;
static htable_t deser_tag;
static htable_t backref_table;
static htable_t fptr_to_id;
static htable_t id_to_fptr;
static const ptrint_t LongSymbol_tag = 23;
static const ptrint_t LongTuple_tag = 24;
static const ptrint_t LongExpr_tag = 25;
static const ptrint_t LiteralVal_tag = 26;
static const ptrint_t SmallInt64_tag = 27;
static const ptrint_t IdTable_tag = 28;
static const ptrint_t Int32_tag = 29;
static const ptrint_t Array1d_tag = 30;
static const ptrint_t Null_tag = 253;
static const ptrint_t ShortBackRef_tag = 254;
static const ptrint_t BackRef_tag = 255;
static ptrint_t VALUE_TAGS;
// pointers to non-AST-ish objects in a compressed tree
static jl_array_t *tree_literal_values=NULL;
static jl_value_t *jl_idtable_type=NULL;
// queue of types to cache
static jl_array_t *datatype_list=NULL;
#define write_uint8(s, n) ios_putc((n), (s))
#define read_uint8(s) ((uint8_t)ios_getc(s))
#define write_int8(s, n) write_uint8(s, n)
#define read_int8(s) read_uint8(s)
static void write_int32(ios_t *s, int32_t i)
{
write_uint8(s, i & 0xff);
write_uint8(s, (i>> 8) & 0xff);
write_uint8(s, (i>>16) & 0xff);
write_uint8(s, (i>>24) & 0xff);
}
static int32_t read_int32(ios_t *s)
{
int b0 = read_uint8(s);
int b1 = read_uint8(s);
int b2 = read_uint8(s);
int b3 = read_uint8(s);
return b0 | (b1<<8) | (b2<<16) | (b3<<24);
}
static void write_uint16(ios_t *s, uint16_t i)
{
write_uint8(s, i & 0xff);
write_uint8(s, (i>> 8) & 0xff);
}
static uint16_t read_uint16(ios_t *s)
{
int b0 = read_uint8(s);
int b1 = read_uint8(s);
return b0 | (b1<<8);
}
static void writetag(ios_t *s, void *v)
{
write_uint8(s, (uint8_t)(ptrint_t)ptrhash_get(&ser_tag, v));
}
static void write_as_tag(ios_t *s, uint8_t tag)
{
if (tag < VALUE_TAGS) {
write_uint8(s, 0);
}
write_uint8(s, tag);
}
// --- Static Compile ---
#define jl_serialize_value(s, v) jl_serialize_value_(s,(jl_value_t*)(v))
static void jl_serialize_value_(ios_t *s, jl_value_t *v);
static jl_value_t *jl_deserialize_value(ios_t *s);
static jl_value_t *jl_deserialize_value_internal(ios_t *s);
jl_value_t ***sysimg_gvars = NULL;
extern int globalUnique;
extern void jl_cpuid(int32_t CPUInfo[4], int32_t InfoType);
extern const char *jl_cpu_string;
uv_lib_t *jl_sysimg_handle = NULL;
char *jl_sysimage_name = NULL;
static void jl_load_sysimg_so(char *fname)
{
// attempt to load the pre-compiled sysimg at fname
// if this succeeds, sysimg_gvars will be a valid array
// otherwise, it will be NULL
jl_sysimg_handle = jl_load_dynamic_library_e(fname, JL_RTLD_DEFAULT | JL_RTLD_GLOBAL);
if (jl_sysimg_handle != 0) {
sysimg_gvars = (jl_value_t***)jl_dlsym(jl_sysimg_handle, "jl_sysimg_gvars");
globalUnique = *(size_t*)jl_dlsym(jl_sysimg_handle, "jl_globalUnique");
const char *cpu_target = (const char*)jl_dlsym(jl_sysimg_handle, "jl_sysimg_cpu_target");
if (strcmp(cpu_target,jl_cpu_string) != 0)
jl_error("Julia and the system image were compiled for different architectures.\n"
"Please delete or regenerate sys.{so,dll,dylib}.\n");
uint32_t info[4];
jl_cpuid((int32_t*)info, 1);
if (strcmp(cpu_target, "native") == 0) {
uint64_t saved_cpuid = *(uint64_t*)jl_dlsym(jl_sysimg_handle, "jl_sysimg_cpu_cpuid");
if (saved_cpuid != (((uint64_t)info[2])|(((uint64_t)info[3])<<32)))
jl_error("Target architecture mismatch. Please delete or regenerate sys.{so,dll,dylib}.");
}
else if (strcmp(cpu_target,"core2") == 0) {
int HasSSSE3 = (info[3] & 1<<9);
if (!HasSSSE3)
jl_error("The current host does not support SSSE3, but the system image was compiled for Core2.\n"
"Please delete or regenerate sys.{so,dll,dylib}.");
}
jl_sysimage_name = strdup(fname);
}
else {
sysimg_gvars = 0;
}
}
static jl_value_t *jl_deserialize_gv(ios_t *s, jl_value_t *v)
{
// Restore the GlobalVariable reference to this jl_value_t via the sysimg_gvars table
int32_t gvname_index = read_int32(s)-1;
if (sysimg_gvars != NULL && gvname_index >= 0) {
*sysimg_gvars[gvname_index] = v;
}
return v;
}
static void jl_serialize_gv(ios_t *s, jl_value_t *v)
{
// write the index of the literal_pointer_val into the system image
write_int32(s, jl_get_llvm_gv(v));
}
static void jl_serialize_globalvals(ios_t *s)
{
size_t i, len = backref_table.size;
void **p = backref_table.table;
for(i=0; i < len; i+=2) {
void *offs = p[i+1];
if (offs != HT_NOTFOUND) {
int32_t gv = jl_get_llvm_gv((jl_value_t*)p[i]);
if (gv != 0) {
write_int32(s, (int)(intptr_t)offs);
write_int32(s, gv);
}
}
}
write_int32(s, 0);
}
static void jl_deserialize_globalvals(ios_t *s)
{
while (1) {
intptr_t key = read_int32(s);
if (key == 0) break;
jl_deserialize_gv(s, (jl_value_t*)ptrhash_get(&backref_table, (void*)key));
}
}
static void jl_serialize_gv_syms(ios_t *s, jl_sym_t *v)
{
// ensures all symbols referenced in the code have
// references in the system image to their global variable
// since symbols are static, they might not have had a
// reference anywhere in the code image other than here
void *bp = ptrhash_get(&backref_table, v);
if (bp == HT_NOTFOUND) {
int32_t gv = jl_get_llvm_gv((jl_value_t*)v);
if (gv != 0) {
jl_serialize_value(s, v);
write_int32(s, gv);
}
}
if (v->left) jl_serialize_gv_syms(s, v->left);
if (v->right) jl_serialize_gv_syms(s, v->right);
}
static void jl_deserialize_gv_syms(ios_t *s)
{
while (1) {
jl_value_t *v = jl_deserialize_value(s);
if (!v) break;
jl_deserialize_gv(s, v);
}
}
struct delayed_fptrs_t {
jl_lambda_info_t *li;
int32_t func;
int32_t cfunc;
} *delayed_fptrs = NULL;
static size_t delayed_fptrs_n = 0;
static size_t delayed_fptrs_max = 0;
static void jl_delayed_fptrs(jl_lambda_info_t *li, int32_t func, int32_t cfunc)
{
// can't restore the fptrs until after the system image is fully restored,
// since it will try to decompress the function AST to determine the argument types
if (cfunc || func) {
if (delayed_fptrs_max < delayed_fptrs_n + 1) {
if (delayed_fptrs_max == 0)
// current measurements put the number of functions at 1130
delayed_fptrs_max = 2048;
else
delayed_fptrs_max *= 2;
delayed_fptrs = (struct delayed_fptrs_t*)realloc(delayed_fptrs, delayed_fptrs_max*sizeof(delayed_fptrs[0])); //assumes sizeof==alignof
}
delayed_fptrs[delayed_fptrs_n].li = li;
delayed_fptrs[delayed_fptrs_n].func = func;
delayed_fptrs[delayed_fptrs_n].cfunc = cfunc;
delayed_fptrs_n++;
}
}
static void jl_update_all_fptrs()
{
//printf("delayed_fptrs_n: %d\n", delayed_fptrs_n);
jl_value_t ***gvars = sysimg_gvars;
if (gvars == 0) return;
// jl_fptr_to_llvm needs to decompress some ASTs, therefore this needs to be NULL
// to skip trying to restore GlobalVariable pointers in jl_deserialize_gv
sysimg_gvars = NULL;
size_t i;
for (i = 0; i < delayed_fptrs_n; i++) {
jl_lambda_info_t *li = delayed_fptrs[i].li;
int32_t func = delayed_fptrs[i].func-1;
if (func >= 0) {
jl_fptr_to_llvm((void*)gvars[func], li, 0);
}
int32_t cfunc = delayed_fptrs[i].cfunc-1;
if (cfunc >= 0) {
jl_fptr_to_llvm((void*)gvars[cfunc], li, 1);
}
}
delayed_fptrs_n = 0;
delayed_fptrs_max = 0;
free(delayed_fptrs);
delayed_fptrs = NULL;
}
// --- serialize ---
static void jl_serialize_fptr(ios_t *s, void *fptr)
{
void **pbp = ptrhash_bp(&fptr_to_id, fptr);
if (*pbp == HT_NOTFOUND)
jl_error("unknown function pointer");
write_uint16(s, *(ptrint_t*)pbp);
}
static void jl_serialize_datatype(ios_t *s, jl_datatype_t *dt)
{
writetag(s, (jl_value_t*)jl_datatype_type);
jl_serialize_value(s, (jl_value_t*)jl_datatype_type);
int tag = 0;
if (dt == jl_int32_type)
tag = 2;
else if (dt == jl_bool_type)
tag = 3;
else if (dt == jl_int64_type)
tag = 4;
write_uint8(s, tag);
size_t nf = jl_tuple_len(dt->names);
write_uint16(s, nf);
write_int32(s, dt->size);
if (nf > 0) {
write_int32(s, dt->alignment);
ios_write(s, (char*)&dt->fields[0], nf*sizeof(jl_fielddesc_t));
jl_serialize_value(s, dt->names);
jl_serialize_value(s, dt->types);
}
int has_instance = !!(dt->instance != NULL);
write_uint8(s, dt->abstract | (dt->mutabl<<1) | (dt->pointerfree<<2) | (has_instance<<3));
if (!dt->abstract)
write_int32(s, dt->uid);
jl_serialize_value(s, dt->parameters);
jl_serialize_value(s, dt->name);
jl_serialize_value(s, dt->super);
jl_serialize_value(s, dt->ctor_factory);
jl_serialize_value(s, dt->env);
jl_serialize_value(s, dt->linfo);
if (has_instance)
jl_serialize_value(s, dt->instance);
jl_serialize_fptr(s, (void*)dt->fptr);
}
static void jl_serialize_module(ios_t *s, jl_module_t *m)
{
// set on every startup; don't save value
jl_sym_t *jhsym = jl_symbol("JULIA_HOME");
writetag(s, jl_module_type);
jl_serialize_value(s, m->name);
jl_serialize_value(s, m->parent);
size_t i;
void **table = m->bindings.table;
for(i=1; i < m->bindings.size; i+=2) {
if (table[i] != HT_NOTFOUND) {
jl_binding_t *b = (jl_binding_t*)table[i];
if (b->owner == m || m != jl_main_module) {
jl_serialize_value(s, b->name);
if (table[i-1] == jhsym && m == jl_core_module) {
jl_serialize_value(s, NULL);
}
else {
jl_serialize_value(s, b->value);
}
jl_serialize_value(s, b->type);
jl_serialize_value(s, b->owner);
write_int8(s, (b->constp<<2) | (b->exportp<<1) | (b->imported));
jl_serialize_gv(s, (jl_value_t*)b);
}
}
}
jl_serialize_value(s, NULL);
if (m == jl_main_module) {
write_int32(s, 1);
jl_serialize_value(s, (jl_value_t*)jl_core_module);
}
else {
write_int32(s, m->usings.len);
for(i=0; i < m->usings.len; i++) {
jl_serialize_value(s, (jl_value_t*)m->usings.items[i]);
}
}
jl_serialize_value(s, m->constant_table);
}
static int is_ast_node(jl_value_t *v)
{
if (jl_is_lambda_info(v)) {
jl_lambda_info_t *li = (jl_lambda_info_t*)v;
if (jl_is_expr(li->ast))
li->ast = jl_compress_ast(li, li->ast);
return 0;
}
return jl_is_symbol(v) || jl_is_expr(v) || jl_is_newvarnode(v) ||
jl_typeis(v, jl_array_any_type) || jl_is_tuple(v) ||
jl_is_uniontype(v) || jl_is_int32(v) || jl_is_int64(v) ||
jl_is_symbolnode(v) || jl_is_bool(v) || jl_is_typevar(v) ||
jl_is_topnode(v) || jl_is_quotenode(v) || jl_is_gotonode(v) ||
jl_is_labelnode(v) || jl_is_linenode(v) || jl_is_getfieldnode(v);
}
static int literal_val_id(jl_value_t *v)
{
for(int i=0; i < jl_array_len(tree_literal_values); i++) {
if (jl_egal(jl_cellref(tree_literal_values,i), v))
return i;
}
jl_cell_1d_push(tree_literal_values, v);
return jl_array_len(tree_literal_values)-1;
}
static void jl_serialize_value_(ios_t *s, jl_value_t *v)
{
if (v == NULL) {
write_uint8(s, Null_tag);
return;
}
void **bp = ptrhash_bp(&ser_tag, v);
if (*bp != HT_NOTFOUND) {
write_as_tag(s, (uint8_t)(ptrint_t)*bp);
return;
}
if (tree_literal_values) {
// compressing tree
if (!is_ast_node(v)) {
writetag(s, (jl_value_t*)LiteralVal_tag);
write_uint16(s, literal_val_id(v));
return;
}
}
else {
bp = ptrhash_bp(&backref_table, v);
if (*bp != HT_NOTFOUND) {
if ((uptrint_t)*bp < 65536) {
write_uint8(s, ShortBackRef_tag);
write_uint16(s, (uptrint_t)*bp);
}
else {
write_uint8(s, BackRef_tag);
write_int32(s, (uptrint_t)*bp);
}
return;
}
ptrhash_put(&backref_table, v, (void*)(ptrint_t)ios_pos(s));
}
size_t i;
if (jl_is_tuple(v)) {
size_t l = jl_tuple_len(v);
if (l <= 255) {
writetag(s, jl_tuple_type);
write_uint8(s, (uint8_t)l);
}
else {
writetag(s, (jl_value_t*)LongTuple_tag);
write_int32(s, l);
}
for(i=0; i < l; i++) {
jl_serialize_value(s, jl_tupleref(v, i));
}
}
else if (jl_is_symbol(v)) {
size_t l = strlen(((jl_sym_t*)v)->name);
if (l <= 255) {
writetag(s, jl_symbol_type);
write_uint8(s, (uint8_t)l);
}
else {
writetag(s, (jl_value_t*)LongSymbol_tag);
write_int32(s, l);
}
ios_write(s, ((jl_sym_t*)v)->name, l);
}
else if (jl_is_array(v)) {
jl_array_t *ar = (jl_array_t*)v;
if (ar->ndims == 1 && ar->elsize < 128) {
writetag(s, (jl_value_t*)Array1d_tag);
write_uint8(s, (ar->ptrarray<<7) | (ar->elsize & 0x7f));
}
else {
writetag(s, (jl_value_t*)jl_array_type);
write_uint16(s, ar->ndims);
write_uint16(s, (ar->ptrarray<<15) | (ar->elsize & 0x7fff));
}
jl_serialize_value(s, jl_typeof(ar));
for (i=0; i < ar->ndims; i++)
jl_serialize_value(s, jl_box_long(jl_array_dim(ar,i)));
if (!ar->ptrarray) {
size_t tot = jl_array_len(ar) * ar->elsize;
ios_write(s, (char*)jl_array_data(ar), tot);
}
else {
for(i=0; i < jl_array_len(ar); i++) {
jl_serialize_value(s, jl_cellref(v, i));
}
}
}
else if (jl_is_expr(v)) {
jl_expr_t *e = (jl_expr_t*)v;
size_t l = jl_array_len(e->args);
if (l <= 255) {
writetag(s, jl_expr_type);
write_uint8(s, (uint8_t)l);
}
else {
writetag(s, (jl_value_t*)LongExpr_tag);
write_int32(s, l);
}
jl_serialize_value(s, e->head);
jl_serialize_value(s, e->etype);
for(i=0; i < l; i++) {
jl_serialize_value(s, jl_exprarg(e, i));
}
}
else if (jl_is_datatype(v)) {
jl_serialize_datatype(s, (jl_datatype_t*)v);
}
else if (jl_is_typevar(v)) {
writetag(s, jl_tvar_type);
jl_serialize_value(s, ((jl_tvar_t*)v)->name);
jl_serialize_value(s, ((jl_tvar_t*)v)->lb);
jl_serialize_value(s, ((jl_tvar_t*)v)->ub);
write_int8(s, ((jl_tvar_t*)v)->bound);
}
else if (jl_is_function(v)) {
writetag(s, jl_function_type);
jl_function_t *f = (jl_function_t*)v;
jl_serialize_value(s, (jl_value_t*)f->linfo);
jl_serialize_value(s, f->env);
if (f->linfo && f->linfo->ast && f->fptr != &jl_trampoline) {
jl_serialize_fptr(s, (void*)&jl_trampoline);
}
else {
jl_serialize_fptr(s, (void*)f->fptr);
}
}
else if (jl_is_lambda_info(v)) {
writetag(s, jl_lambda_info_type);
jl_lambda_info_t *li = (jl_lambda_info_t*)v;
jl_serialize_value(s, li->ast);
jl_serialize_value(s, (jl_value_t*)li->sparams);
// don't save cached type info for code in the Core module, because
// it might reference types in the old Base module.
if (li->module == jl_core_module)
jl_serialize_value(s, (jl_value_t*)jl_null);
else
jl_serialize_value(s, (jl_value_t*)li->tfunc);
jl_serialize_value(s, (jl_value_t*)li->name);
jl_serialize_value(s, (jl_value_t*)li->specTypes);
jl_serialize_value(s, (jl_value_t*)li->specializations);
write_int8(s, li->inferred);
jl_serialize_value(s, (jl_value_t*)li->file);
write_int32(s, li->line);
jl_serialize_value(s, (jl_value_t*)li->module);
jl_serialize_value(s, (jl_value_t*)li->roots);
jl_serialize_value(s, (jl_value_t*)li->def);
jl_serialize_value(s, (jl_value_t*)li->capt);
// save functionObject pointers
write_int32(s, li->functionID);
write_int32(s, li->cFunctionID);
}
else if (jl_typeis(v, jl_module_type)) {
jl_serialize_module(s, (jl_module_t*)v);
}
else if (jl_typeis(v, jl_task_type)) {
jl_error("Task cannot be serialized");
}
else {
jl_datatype_t *t = (jl_datatype_t*)jl_typeof(v);
void *data = jl_data_ptr(v);
if (t == jl_int64_type &&
*(int64_t*)data >= S32_MIN && *(int64_t*)data <= S32_MAX) {
writetag(s, (jl_value_t*)SmallInt64_tag);
write_int32(s, (int32_t)*(int64_t*)data);
}
else if (t == jl_int32_type) {
writetag(s, (jl_value_t*)Int32_tag);
write_int32(s, (int32_t)*(int32_t*)data);
}
else {
if ((jl_value_t*)t == jl_idtable_type)
writetag(s, (jl_value_t*)IdTable_tag);
else
writetag(s, (jl_value_t*)jl_datatype_type);
jl_serialize_value(s, t);
size_t nf = jl_tuple_len(t->names);
if (nf == 0 && jl_datatype_size(t)>0) {
if (t->name == jl_pointer_type->name) {
write_int32(s, 0);
#ifdef _P64
write_int32(s, 0);
#endif
}
else {
ios_write(s, (char*)data, jl_datatype_size(t));
}
}
else {
if ((jl_value_t*)t == jl_idtable_type) {
jl_array_t *data = (jl_array_t*)jl_get_nth_field(v, 0);
jl_value_t **d = (jl_value_t**)data->data;
for(size_t i=0; i < jl_array_len(data); i+=2) {
if (d[i+1] != NULL) {
jl_serialize_value(s, d[i+1]);
jl_serialize_value(s, d[i]);
}
}
jl_serialize_value(s, NULL);
}
else {
for(size_t i=0; i < nf; i++) {
jl_serialize_value(s, jl_get_nth_field(v, i));
}
}
}
}
}
}
// --- deserialize ---
static jl_fptr_t jl_deserialize_fptr(ios_t *s)
{
int fptr = read_uint16(s);
if (fptr == 0)
return NULL;
void **pbp = ptrhash_bp(&id_to_fptr, (void*)(ptrint_t)fptr);
if (*pbp == HT_NOTFOUND)
jl_error("unknown function pointer ID");
return *(jl_fptr_t*)pbp;
}
#define DTINSTANCE_PLACEHOLDER ((void*)2)
static jl_value_t *jl_deserialize_datatype(ios_t *s, int pos)
{
int tag = read_uint8(s);
uint16_t nf = read_uint16(s);
size_t size = read_int32(s);
jl_datatype_t *dt;
if (tag == 2)
dt = jl_int32_type;
else if (tag == 3)
dt = jl_bool_type;
else if (tag == 4)
dt = jl_int64_type;
else
dt = jl_new_uninitialized_datatype(nf);
dt->size = size;
dt->struct_decl = NULL;
dt->instance = NULL;
assert(tree_literal_values==NULL);
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, dt);
if (nf > 0) {
dt->alignment = read_int32(s);
ios_read(s, (char*)&dt->fields[0], nf*sizeof(jl_fielddesc_t));
dt->names = (jl_tuple_t*)jl_deserialize_value(s);
dt->types = (jl_tuple_t*)jl_deserialize_value(s);
}
else {
dt->alignment = dt->size;
if (dt->alignment > MAX_ALIGN)
dt->alignment = MAX_ALIGN;
dt->names = dt->types = jl_null;
}
uint8_t flags = read_uint8(s);
dt->abstract = flags&1;
dt->mutabl = (flags>>1)&1;
dt->pointerfree = (flags>>2)&1;
int has_instance = (flags>>3)&1;
if (!dt->abstract)
dt->uid = read_int32(s);
else
dt->uid = 0;
dt->parameters = (jl_tuple_t*)jl_deserialize_value(s);
dt->name = (jl_typename_t*)jl_deserialize_value(s);
dt->super = (jl_datatype_t*)jl_deserialize_value(s);
dt->ctor_factory = jl_deserialize_value(s);
dt->env = jl_deserialize_value(s);
dt->linfo = (jl_lambda_info_t*)jl_deserialize_value(s);
if (has_instance) {
jl_value_t *instance = (jl_value_t*)jl_deserialize_value_internal(s);
if (instance == DTINSTANCE_PLACEHOLDER)
instance = jl_new_struct_uninit(dt);
dt->instance = instance;
}
dt->fptr = jl_deserialize_fptr(s);
if (dt->name == jl_array_type->name || dt->name == jl_pointer_type->name ||
dt->name == jl_type_type->name || dt->name == jl_vararg_type->name ||
dt->name == jl_abstractarray_type->name ||
dt->name == jl_densearray_type->name) {
// builtin types are not serialized, so their caches aren't
// explicitly saved. so we reconstruct the caches of builtin
// parametric types here.
jl_cell_1d_push(datatype_list, (jl_value_t*)dt);
}
return (jl_value_t*)dt;
}
jl_array_t *jl_eqtable_put(jl_array_t *h, void *key, void *val);
// Internal jl_deserialize_value. May return the placeholder value DTINSTANCE_PLACEHOLDER, unlike jl_deserialize_value
static jl_value_t *jl_deserialize_value_internal(ios_t *s)
{
int pos = ios_pos(s);
int32_t tag = read_uint8(s);
if (tag == Null_tag)
return NULL;
if (tag == 0) {
tag = read_uint8(s);
jl_value_t *v = (jl_value_t*)ptrhash_get(&deser_tag, (void*)(ptrint_t)tag);
assert(v != HT_NOTFOUND);
return v;
}
if (tag == BackRef_tag || tag == ShortBackRef_tag) {
assert(tree_literal_values == NULL);
ptrint_t offs = (tag == BackRef_tag) ? read_int32(s) : read_uint16(s);
void **bp = ptrhash_bp(&backref_table, (void*)(ptrint_t)offs);
assert(*bp != HT_NOTFOUND);
return (jl_value_t*)*bp;
}
jl_value_t *vtag=(jl_value_t*)ptrhash_get(&deser_tag,(void*)(ptrint_t)tag);
if (tag >= VALUE_TAGS) {
return vtag;
}
else if (vtag == (jl_value_t*)LiteralVal_tag) {
return jl_cellref(tree_literal_values, read_uint16(s));
}
int usetable = (tree_literal_values == NULL);
size_t i;
if (vtag == (jl_value_t*)jl_tuple_type ||
vtag == (jl_value_t*)LongTuple_tag) {
size_t len;
if (vtag == (jl_value_t*)jl_tuple_type)
len = read_uint8(s);
else
len = read_int32(s);
jl_tuple_t *tu = jl_alloc_tuple_uninit(len);
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, (jl_value_t*)tu);
for(i=0; i < len; i++)
jl_tupleset(tu, i, jl_deserialize_value(s));
return (jl_value_t*)tu;
}
else if (vtag == (jl_value_t*)jl_symbol_type ||
vtag == (jl_value_t*)LongSymbol_tag) {
size_t len;
if (vtag == (jl_value_t*)jl_symbol_type)
len = read_uint8(s);
else
len = read_int32(s);
char *name = (char*)alloca(len+1);
ios_read(s, name, len);
name[len] = '\0';
jl_value_t *sym = (jl_value_t*)jl_symbol(name);
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, sym);
return sym;
}
else if (vtag == (jl_value_t*)jl_array_type ||
vtag == (jl_value_t*)Array1d_tag) {
int16_t ndims;
int isunboxed, elsize;
if (vtag == (jl_value_t*)Array1d_tag) {
ndims = 1;
elsize = read_uint8(s);
isunboxed = !(elsize>>7);
elsize = elsize&0x7f;
}
else {
ndims = read_uint16(s);
elsize = read_uint16(s);
isunboxed = !(elsize>>15);
elsize = elsize&0x7fff;
}
jl_value_t *aty = jl_deserialize_value(s);
size_t *dims = (size_t*)alloca(ndims*sizeof(size_t));
for(i=0; i < ndims; i++)
dims[i] = jl_unbox_long(jl_deserialize_value(s));
jl_array_t *a = jl_new_array_for_deserialization((jl_value_t*)aty, ndims, dims, isunboxed, elsize);
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, (jl_value_t*)a);
if (!a->ptrarray) {
size_t tot = jl_array_len(a) * a->elsize;
ios_read(s, (char*)jl_array_data(a), tot);
}
else {
for(i=0; i < jl_array_len(a); i++) {
((jl_value_t**)a->data)[i] = jl_deserialize_value(s);
}
}
return (jl_value_t*)a;
}
else if (vtag == (jl_value_t*)jl_expr_type ||
vtag == (jl_value_t*)LongExpr_tag) {
size_t len;
if (vtag == (jl_value_t*)jl_expr_type)
len = read_uint8(s);
else
len = read_int32(s);
jl_expr_t *e = jl_exprn((jl_sym_t*)jl_deserialize_value(s), len);
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, (jl_value_t*)e);
e->etype = jl_deserialize_value(s);
for(i=0; i < len; i++) {
jl_cellset(e->args, i, jl_deserialize_value(s));
}
return (jl_value_t*)e;
}
else if (vtag == (jl_value_t*)jl_tvar_type) {
jl_tvar_t *tv = (jl_tvar_t*)newobj((jl_value_t*)jl_tvar_type, 4);
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, tv);
tv->name = (jl_sym_t*)jl_deserialize_value(s);
tv->lb = jl_deserialize_value(s);
tv->ub = jl_deserialize_value(s);
tv->bound = read_int8(s);
return (jl_value_t*)tv;
}
else if (vtag == (jl_value_t*)jl_function_type) {
jl_function_t *f =
(jl_function_t*)newobj((jl_value_t*)jl_function_type, 3);
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, f);
f->linfo = (jl_lambda_info_t*)jl_deserialize_value(s);
f->env = jl_deserialize_value(s);
f->fptr = jl_deserialize_fptr(s);
return (jl_value_t*)f;
}
else if (vtag == (jl_value_t*)jl_lambda_info_type) {
jl_lambda_info_t *li =
(jl_lambda_info_t*)newobj((jl_value_t*)jl_lambda_info_type,
LAMBDA_INFO_NW);
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, li);
li->ast = jl_deserialize_value(s);
li->sparams = (jl_tuple_t*)jl_deserialize_value(s);
li->tfunc = jl_deserialize_value(s);
li->name = (jl_sym_t*)jl_deserialize_value(s);
li->specTypes = (jl_tuple_t*)jl_deserialize_value(s);
li->specializations = (jl_array_t*)jl_deserialize_value(s);
li->inferred = read_int8(s);
li->file = (jl_sym_t*)jl_deserialize_value(s);
li->line = read_int32(s);
li->module = (jl_module_t*)jl_deserialize_value(s);
li->roots = (jl_array_t*)jl_deserialize_value(s);
li->def = (jl_lambda_info_t*)jl_deserialize_value(s);
li->capt = jl_deserialize_value(s);
li->fptr = &jl_trampoline;
li->functionObject = NULL;
li->cFunctionObject = NULL;
li->inInference = 0;
li->inCompile = 0;
li->unspecialized = NULL;
li->functionID = 0;
li->cFunctionID = 0;
int32_t cfunc_llvm, func_llvm;
func_llvm = read_int32(s);
cfunc_llvm = read_int32(s);
jl_delayed_fptrs(li, func_llvm, cfunc_llvm);
return (jl_value_t*)li;
}
else if (vtag == (jl_value_t*)jl_module_type) {
jl_sym_t *mname = (jl_sym_t*)jl_deserialize_value(s);
jl_module_t *m = jl_new_module(mname);
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, m);
m->parent = (jl_module_t*)jl_deserialize_value(s);
while (1) {
jl_sym_t *name = (jl_sym_t*)jl_deserialize_value(s);
if (name == NULL)
break;
jl_binding_t *b = jl_get_binding_wr(m, name);
b->value = jl_deserialize_value(s);
b->type = (jl_value_t*)jl_deserialize_value(s);
b->owner = (jl_module_t*)jl_deserialize_value(s);
int8_t flags = read_int8(s);
b->constp = (flags>>2) & 1;
b->exportp = (flags>>1) & 1;
b->imported = (flags) & 1;
jl_deserialize_gv(s, (jl_value_t*)b);
}
size_t ni = read_int32(s);
for(size_t i=0; i < ni; i++) {
arraylist_push(&m->usings, jl_deserialize_value(s));
}
m->constant_table = (jl_array_t*)jl_deserialize_value(s);
return (jl_value_t*)m;
}
else if (vtag == (jl_value_t*)SmallInt64_tag) {
jl_value_t *v = jl_box_int64(read_int32(s));
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, v);
return v;
}
else if (vtag == (jl_value_t*)Int32_tag) {
jl_value_t *v = jl_box_int32(read_int32(s));
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, v);
return v;
}
else if (vtag == (jl_value_t*)jl_datatype_type || vtag == (jl_value_t*)IdTable_tag) {
// If the value v we are about to deserialize is some dt->instance, we have a circular
// reference, because v == v->type->instance. To avoid this, we put a null value in
// the backref table to reserve the space. If jl_deserialize_value encounters this,
// it knows to do the allocation itself. This work, because in all instances where
// v->type->instance != null, v->type has no fields, so there is no further serialized
// data stored that we would need to construct the type.
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, DTINSTANCE_PLACEHOLDER);
jl_datatype_t *dt = (jl_datatype_t*)jl_deserialize_value(s);
if (dt == jl_datatype_type)
return jl_deserialize_datatype(s, pos);
size_t nf = jl_tuple_len(dt->names);
jl_value_t *v;
if (nf == 0 && jl_datatype_size(dt)>0) {
int nby = jl_datatype_size(dt);
char *data = (char*)alloca(nby);
ios_read(s, data, nby);
v = NULL;
if (dt == jl_int32_type)
v = jl_box_int32(*(int32_t*)data);
else if (dt == jl_int64_type)
v = jl_box_int64(*(int64_t*)data);
else if (dt == jl_bool_type)
v = jl_box_bool(*(int8_t*)data);
else {
switch (nby) {
case 1: v = jl_box8 (dt, *(int8_t *)data); break;
case 2: v = jl_box16(dt, *(int16_t*)data); break;
case 4: v = jl_box32(dt, *(int32_t*)data); break;
case 8: v = jl_box64(dt, *(int64_t*)data); break;
default:
v = (jl_value_t*)allocobj(sizeof(void*)+nby);
v->type = (jl_value_t*)dt;
memcpy(jl_data_ptr(v), data, nby);
}
}
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, v);
}
else {
if (dt->instance) {
if (usetable)
*ptrhash_bp(&backref_table, (void*)(ptrint_t)pos) = dt->instance;
return dt->instance;
}
v = jl_new_struct_uninit(dt);
if (usetable)
ptrhash_put(&backref_table, (void*)(ptrint_t)pos, v);
if (vtag == (jl_value_t*)IdTable_tag) {
jl_array_t *a = jl_alloc_cell_1d(32);
while (1) {
jl_value_t *val = jl_deserialize_value(s);
if (val == NULL)
break;
jl_value_t *key = jl_deserialize_value(s);
a = jl_eqtable_put(a, key, val);
}
jl_set_nth_field(v, 0, (jl_value_t*)a);
}
else {
for(i=0; i < nf; i++) {
jl_set_nth_field(v, i, jl_deserialize_value(s));
}
}
}
// TODO: put WeakRefs on the weak_refs list
return v;
}
assert(0);
return NULL;
}
static jl_value_t* jl_deserialize_value(ios_t *s)
{
jl_value_t *v = jl_deserialize_value_internal(s);
assert(v != DTINSTANCE_PLACEHOLDER);
return v;
}
// --- entry points ---
extern jl_array_t *jl_module_init_order;
DLLEXPORT
void jl_save_system_image(char *fname)
{
jl_gc_collect();
jl_gc_collect();
int en = jl_gc_is_enabled();
jl_gc_disable();
htable_reset(&backref_table, 50000);
ios_t f;
if (ios_file(&f, fname, 1, 1, 1, 1) == NULL) {
JL_PRINTF(JL_STDERR, "Cannot open system image file \"%s\" for writing.\n", fname);
exit(1);
}
// orphan old Base module if present
jl_base_module = (jl_module_t*)jl_get_global(jl_main_module, jl_symbol("Base"));
// delete cached slow ASCIIString constructor if present
jl_methtable_t *mt = jl_gf_mtable((jl_function_t*)jl_ascii_string_type);
jl_array_t *spec = mt->defs->func->linfo->specializations;
if (spec != NULL && jl_array_len(spec) > 0 &&
((jl_lambda_info_t*)jl_cellref(spec,0))->inferred == 0) {
mt->cache = (jl_methlist_t*)JL_NULL;
mt->cache_arg1 = (jl_array_t*)JL_NULL;
mt->defs->func->linfo->tfunc = (jl_value_t*)jl_null;
mt->defs->func->linfo->specializations = NULL;
}
jl_idtable_type = jl_get_global(jl_base_module, jl_symbol("ObjectIdDict"));
jl_serialize_value(&f, jl_array_type->env);
jl_serialize_value(&f, jl_main_module);
// deser_tag is an array indexed from 2 until HT_NOTFOUND
// ensure everything in there can be reassociated with its GlobalValue
ptrint_t i=2;
void *v = ptrhash_get(&deser_tag, (void*)i);
while (v != HT_NOTFOUND) {
jl_serialize_gv(&f, (jl_value_t*)v);
v = ptrhash_get(&deser_tag, (void*)i);