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dump.c
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dump.c
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// This file is a part of Julia. License is MIT: http:https://julialang.org/license
/*
saving and restoring system images
*/
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "julia.h"
#include "julia_internal.h"
#include "builtin_proto.h"
#ifndef _OS_WINDOWS_
#include <dlfcn.h>
#endif
#ifndef _COMPILER_MICROSOFT_
#include "valgrind.h"
#else
#define RUNNING_ON_VALGRIND 0
#endif
#ifdef __cplusplus
extern "C" {
#endif
// TODO: put WeakRefs on the weak_refs list during deserialization
// TODO: handle finalizers
// hash of definitions for predefined tagged object
static htable_t ser_tag;
// array of definitions for the predefined tagged object types
// (reverse of ser_tag)
static jl_value_t *deser_tag[256];
// hash of some common symbols, encoded as CommonSym_tag plus 1 byte
static htable_t common_symbol_tag;
static jl_value_t *deser_symbols[256];
// table of all objects that have been deserialized, indexed by pos
// (the order in the serializer stream) in MODE_MODULE, the low
// bit is reserved for flagging certain entries and pos is
// left shift by 1
static htable_t backref_table;
int backref_table_numel;
static arraylist_t backref_list;
// list of (jl_value_t **loc, size_t pos) entries
// for anything that was flagged by the deserializer for later
// type-rewriting of some sort
static arraylist_t flagref_list;
// list of (size_t pos, (void *f)(jl_value_t*)) entries
// for the serializer to mark values in need of rework by function f
// during deserialization later
static arraylist_t reinit_list;
// list of any methtable objects that were deserialized in MODE_MODULE
// and need to be rehashed after assigning the uid fields to types
// (only used in MODE_MODULE and MODE_MODULE_POSTWORK)
static arraylist_t methtable_list;
// list of stuff that is being serialized
// (only used by the incremental serializer in MODE_MODULE)
static jl_array_t *serializer_worklist;
// hash of definitions for predefined function pointers
static htable_t fptr_to_id;
// array of definitions for the predefined function pointers
// (reverse of fptr_to_id)
static jl_fptr_t id_to_fptrs[] = {
NULL, NULL,
jl_f_throw, jl_f_is, jl_f_no_function, jl_f_typeof,
jl_f_subtype, jl_f_isa, jl_f_typeassert, jl_f_apply,
jl_f_top_eval, jl_f_isdefined, jl_f_tuple, jl_f_svec,
jl_f_get_field, jl_f_set_field, jl_f_field_type, jl_f_nfields,
jl_f_arraylen, jl_f_arrayref, jl_f_arrayset, jl_f_arraysize,
jl_f_instantiate_type, jl_f_kwcall, jl_trampoline,
jl_f_methodexists, jl_f_applicable, jl_f_invoke,
jl_apply_generic, jl_unprotect_stack, jl_f_sizeof, jl_f_new_expr,
NULL };
// pointers to non-AST-ish objects in a compressed tree
static jl_array_t *tree_literal_values=NULL; // (only used in MODE_AST)
static jl_module_t *tree_enclosing_module=NULL; // (only used in MODE_AST)
static const ptrint_t LongSymbol_tag = 23;
static const ptrint_t LongSvec_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 SmallDataType_tag= 28;
static const ptrint_t Int32_tag = 29;
static const ptrint_t Array1d_tag = 30;
static const ptrint_t Singleton_tag = 31;
static const ptrint_t CommonSym_tag = 32;
static const ptrint_t NearbyGlobal_tag = 33; // a GlobalRef pointing to tree_enclosing_module
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;
typedef enum _DUMP_MODES {
// not in the serializer at all, or
// something is seriously wrong
MODE_INVALID = 0,
// jl_uncompress_ast
// compressing / decompressing an AST Expr in a LambdaStaticData
MODE_AST,
// jl_restore_system_image
// restoring an entire system image from disk
MODE_SYSTEM_IMAGE,
// jl_restore_new_module
// restoring a single module from disk for integration
// into the currently running system image / environment
MODE_MODULE, // first-stage (pre type-uid assignment)
MODE_MODULE_POSTWORK, // second-stage (post type-uid assignment)
} DUMP_MODES;
static DUMP_MODES mode = (DUMP_MODES) 0;
static jl_value_t *jl_idtable_type=NULL;
// queue of types to cache
static jl_array_t *datatype_list=NULL; // (only used in MODE_SYSTEM_IMAGE)
#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_uint64(ios_t *s, uint64_t i)
{
write_int32(s, i & 0xffffffff);
write_int32(s, (i>>32) & 0xffffffff);
}
static uint64_t read_uint64(ios_t *s)
{
uint64_t b0 = (uint32_t)read_int32(s);
uint64_t b1 = (uint32_t)read_int32(s);
return b0 | (b1<<32);
}
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, jl_value_t **loc);
jl_value_t ***sysimg_gvars = NULL;
#ifdef HAVE_CPUID
extern void jl_cpuid(int32_t CPUInfo[4], int32_t InfoType);
#endif
extern int globalUnique;
uv_lib_t *jl_sysimg_handle = NULL;
uint64_t jl_sysimage_base = 0;
#ifdef _OS_WINDOWS_
#include <dbghelp.h>
#endif
DLLEXPORT int jl_running_on_valgrind()
{
return RUNNING_ON_VALGRIND;
}
static int jl_load_sysimg_so()
{
#ifndef _OS_WINDOWS_
Dl_info dlinfo;
#endif
// attempt to load the pre-compiled sysimage from jl_sysimg_handle
if (jl_sysimg_handle == 0)
return -1;
int imaging_mode = jl_generating_output() && !jl_options.incremental;
// in --build mode only use sysimg data, not precompiled native code
if (!imaging_mode && jl_options.use_precompiled==JL_OPTIONS_USE_PRECOMPILED_YES) {
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_options.cpu_target) != 0)
jl_error("Julia and the system image were compiled for different architectures.\n"
"Please delete or regenerate sys.{so,dll,dylib}.\n");
#ifdef HAVE_CPUID
uint32_t info[4];
jl_cpuid((int32_t*)info, 1);
if (strcmp(cpu_target, "native") == 0) {
if (!RUNNING_ON_VALGRIND) {
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}.\n");
}
}
else if (strcmp(cpu_target,"core2") == 0) {
int HasSSSE3 = (info[2] & 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}.\n");
}
#endif
#ifdef _OS_WINDOWS_
jl_sysimage_base = (intptr_t)jl_sysimg_handle->handle;
#else
if (dladdr((void*)sysimg_gvars, &dlinfo) != 0) {
jl_sysimage_base = (intptr_t)dlinfo.dli_fbase;
}
else {
jl_sysimage_base = 0;
}
#endif
}
const char *sysimg_data = (const char*)jl_dlsym_e(jl_sysimg_handle, "jl_system_image_data");
if (sysimg_data) {
size_t len = *(size_t*)jl_dlsym(jl_sysimg_handle, "jl_system_image_size");
jl_restore_system_image_data(sysimg_data, len);
return 0;
}
return -1;
}
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 && mode == MODE_SYSTEM_IMAGE) {
*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) {
uintptr_t pos = offs - HT_NOTFOUND - 1;
int32_t gv = jl_get_llvm_gv((jl_value_t*)p[i]);
if (gv != 0) {
write_int32(s, pos);
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*)backref_list.items[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, NULL);
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()
{
//jl_printf(JL_STDOUT, "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 int module_in_worklist(jl_module_t *mod) {
int i, l = jl_array_len(serializer_worklist);
for (i = 0; i < l; i++) {
jl_module_t *workmod = (jl_module_t*)jl_cellref(serializer_worklist, i);
if (jl_is_module(workmod) && jl_is_submodule(mod, workmod))
return 1;
}
return 0;
}
static void jl_serialize_datatype(ios_t *s, jl_datatype_t *dt)
{
int tag = 0;
if (mode == MODE_MODULE_POSTWORK) {
if (dt->uid != 0) {
if (dt->name->primary == (jl_value_t*)dt)
tag = 6; // primary type
else
tag = 7; // must use apply_type
}
}
else if (mode == MODE_MODULE) {
int internal = module_in_worklist(dt->name->module);
int i, l = jl_array_len(serializer_worklist);
for (i = 0; i < l; i++) {
jl_module_t *mod = (jl_module_t*)jl_cellref(serializer_worklist, i);
if (jl_is_module(mod) && jl_is_submodule(dt->name->module, mod)) {
internal = 1;
break;
}
}
if (!internal && dt->name->primary == (jl_value_t*)dt) {
tag = 6; // external primary type
}
else if (dt->uid == 0) {
tag = 0; // normal struct
}
else if (!internal && jl_svec_len(dt->parameters) == 0) {
tag = 7; // external type that can be immediately recreated (with apply_type)
}
else {
tag = 5; // anything else (needs uid assigned later)
// also flag this in the backref table as special
uptrint_t *bp = (uptrint_t*)ptrhash_bp(&backref_table, dt);
assert(*bp != (uptrint_t)HT_NOTFOUND);
*bp |= 1; assert(((uptrint_t)HT_NOTFOUND)|1);
}
}
else if (dt == jl_int32_type)
tag = 2;
else if (dt == jl_bool_type)
tag = 3;
else if (dt == jl_int64_type)
tag = 4;
writetag(s, (jl_value_t*)SmallDataType_tag);
write_uint8(s, 0); // virtual size
jl_serialize_value(s, (jl_value_t*)jl_datatype_type);
write_uint8(s, tag);
if (tag == 6) {
jl_serialize_value(s, dt->name);
return;
}
if (tag == 7) {
jl_serialize_value(s, dt->name);
jl_serialize_value(s, dt->parameters);
return;
}
size_t nf = jl_datatype_nfields(dt);
write_uint16(s, nf);
write_int32(s, dt->size);
int has_instance = !!(dt->instance != NULL);
write_uint8(s, dt->abstract | (dt->mutabl<<1) | (dt->pointerfree<<2) | (has_instance<<3));
if (!dt->abstract) {
write_uint16(s, dt->ninitialized);
if (mode != MODE_MODULE && mode != MODE_MODULE_POSTWORK) {
write_int32(s, dt->uid);
}
}
if (has_instance)
jl_serialize_value(s, dt->instance);
if (nf > 0) {
write_int32(s, dt->alignment);
write_int8(s, dt->haspadding);
ios_write(s, (char*)&dt->fields[0], nf*sizeof(jl_fielddesc_t));
jl_serialize_value(s, dt->types);
}
jl_serialize_value(s, dt->parameters);
jl_serialize_value(s, dt->name);
jl_serialize_value(s, dt->super);
}
static void jl_serialize_module(ios_t *s, jl_module_t *m)
{
writetag(s, jl_module_type);
jl_serialize_value(s, m->name);
int ref_only = 0;
if (mode == MODE_MODULE_POSTWORK) {
assert(!module_in_worklist(m));
ref_only = 1;
}
if (mode == MODE_MODULE) {
if (!module_in_worklist(m))
ref_only = 1;
write_int8(s, ref_only);
}
jl_serialize_value(s, m->parent);
if (ref_only) {
assert(m->parent != m);
return;
}
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);
jl_serialize_value(s, b->value);
jl_serialize_value(s, b->globalref);
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);
write_uint8(s, m->istopmod);
write_uint64(s, m->uuid);
}
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);
jl_gc_wb(li, li->ast);
}
return 0;
}
return jl_is_symbol(v) || jl_is_symbolnode(v) || jl_is_gensym(v) ||
jl_is_expr(v) || jl_is_newvarnode(v) || jl_is_svec(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_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_globalref(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 (jl_is_symbol(v)) {
void *idx = ptrhash_get(&common_symbol_tag, v);
if (idx != HT_NOTFOUND) {
writetag(s, (jl_value_t*)CommonSym_tag);
write_uint8(s, (uint8_t)(size_t)idx);
return;
}
}
if (mode == MODE_AST) {
// 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) {
uintptr_t pos = *bp - HT_NOTFOUND - 1;
if ((uptrint_t)*bp < 65536) {
write_uint8(s, ShortBackRef_tag);
write_uint16(s, pos);
}
else {
write_uint8(s, BackRef_tag);
write_int32(s, pos);
}
return;
}
ptrint_t pos = backref_table_numel++;
if (jl_typeof(v) == jl_idtable_type) {
// will need to rehash this, later (after types are fully constructed)
arraylist_push(&reinit_list, (void*)pos);
arraylist_push(&reinit_list, (void*)1);
}
if (mode == MODE_MODULE && jl_is_module(v)) {
jl_module_t *m = (jl_module_t*)v;
if (module_in_worklist(m) && !module_in_worklist(m->parent)) {
// will need to reinsert this into parent bindings, later (in case of any errors during reinsert)
arraylist_push(&reinit_list, (void*)pos);
arraylist_push(&reinit_list, (void*)2);
}
}
if (mode == MODE_MODULE || mode == MODE_MODULE_POSTWORK)
pos <<= 1;
ptrhash_put(&backref_table, v, HT_NOTFOUND + pos + 1);
}
size_t i;
if (jl_is_svec(v)) {
size_t l = jl_svec_len(v);
if (l <= 255) {
writetag(s, jl_simplevector_type);
write_uint8(s, (uint8_t)l);
}
else {
writetag(s, (jl_value_t*)LongSvec_tag);
write_int32(s, l);
}
for(i=0; i < l; i++) {
jl_serialize_value(s, jl_svecref(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_globalref(v)) {
if (mode == MODE_AST && jl_globalref_mod(v) == tree_enclosing_module) {
writetag(s, (jl_value_t*)NearbyGlobal_tag);
jl_serialize_value(s, jl_globalref_name(v));
}
else {
writetag(s, (jl_value_t*)jl_globalref_type);
jl_serialize_value(s, jl_globalref_mod(v));
jl_serialize_value(s, jl_globalref_name(v));
}
}
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));
}
for (i=0; i < ar->ndims; i++)
jl_serialize_value(s, jl_box_long(jl_array_dim(ar,i)));
jl_serialize_value(s, jl_typeof(ar));
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);
if (mode == MODE_MODULE || mode == MODE_MODULE_POSTWORK) {
if (jl_is_gf(v)) {
jl_methtable_t *mt = jl_gf_mtable(v);
if (mt->module && !module_in_worklist(mt->module)) {
write_int8(s, 1);
jl_serialize_value(s, (jl_value_t*)mt->module);
jl_serialize_value(s, (jl_value_t*)mt->name);
return;
}
}
write_int8(s, 0);
}
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_nothing);
}
else {
jl_array_t *tf = (jl_array_t*)li->tfunc;
// go through the t-func cache, replacing ASTs with just return
// types for abstract argument types. these ASTs are generally
// not needed (e.g. they don't get inlined).
if (tf && jl_typeis(tf, jl_array_any_type)) {
size_t i, l = jl_array_len(tf);
for(i=0; i < l; i += 3) {
if (!jl_is_leaf_type(jl_cellref(tf,i))) {
jl_value_t *ast = jl_cellref(tf,i+1);
if (ast && jl_is_array(ast) && jl_array_len(ast) > 500)
jl_cellset(tf, i+1, jl_ast_rettype(li, (jl_value_t*)ast));
}
}
}
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);
jl_serialize_value(s, (jl_value_t*)li->unspecialized);
// save functionObject pointers
write_int32(s, li->functionID);
write_int32(s, li->specFunctionID);
}
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 (v == t->instance) {
if (mode == MODE_MODULE) {
// also flag this in the backref table as special
uptrint_t *bp = (uptrint_t*)ptrhash_bp(&backref_table, v);
assert(*bp != (uptrint_t)HT_NOTFOUND);
*bp |= 1; assert(((uptrint_t)HT_NOTFOUND)|1);
}
writetag(s, (jl_value_t*)Singleton_tag);
jl_serialize_value(s, t);
return;
}
if (t->size <= 255) {
writetag(s, (jl_value_t*)SmallDataType_tag);
write_uint8(s, t->size);
}
else {
writetag(s, (jl_value_t*)jl_datatype_type);
write_int32(s, t->size);
}
jl_serialize_value(s, t);
if ((mode == MODE_MODULE || mode == MODE_MODULE_POSTWORK) && t == jl_typename_type) {
if (module_in_worklist(((jl_typename_t*)v)->module)) {
write_uint8(s, 0);
}
else {
write_uint8(s, 1);
jl_typename_t *tn = (jl_typename_t*)v;
jl_serialize_value(s, tn->module);
jl_serialize_value(s, tn->name);
return;
}
}
size_t nf = jl_datatype_nfields(t);
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 {
for(size_t i=0; i < nf; i++) {
if (t->fields[i].size > 0) {
jl_serialize_value(s, jl_get_nth_field(v, i));
}
}
}
}
}
}
static void jl_serialize_methtable_from_mod(ios_t *s, jl_methtable_t *mt, int8_t iskw)
{
if (iskw) {
if (!mt->kwsorter)
return;
assert(jl_is_gf(mt->kwsorter));
assert(mt->module == jl_gf_mtable(mt->kwsorter)->module);
mt = jl_gf_mtable(mt->kwsorter);
assert(!mt->kwsorter);
}
assert(mt->module);
jl_methlist_t *ml = mt->defs;
while (ml != (void*)jl_nothing) {
if (module_in_worklist(ml->func->linfo->module)) {
jl_serialize_value(s, mt->module);
jl_serialize_value(s, mt->name);
write_int8(s, iskw);
jl_serialize_value(s, ml->sig);
jl_serialize_value(s, ml->func);
if (jl_is_svec(ml->tvars))
jl_serialize_value(s, ml->tvars);
else
jl_serialize_value(s, jl_svec1(ml->tvars));
write_int8(s, ml->isstaged);
}
ml = ml->next;
}
}
static void jl_serialize_lambdas_from_mod(ios_t *s, jl_module_t *m)
{
if (module_in_worklist(m)) return;
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 && b->value && b->constp) {
if (jl_is_function(b->value) && jl_is_gf(b->value)) {
jl_function_t *gf = (jl_function_t*)b->value;
jl_methtable_t *mt = jl_gf_mtable(gf);
if (mt->name == b->name && mt->module == m) {
jl_serialize_methtable_from_mod(s, mt, 0);
jl_serialize_methtable_from_mod(s, mt, 1);
}
}
else if (jl_is_module(b->value)) {
jl_module_t *child = (jl_module_t*)b->value;
if (child != m && child->parent == m && child->name == b->name) {
// this is the original/primary binding for the submodule
jl_serialize_lambdas_from_mod(s, (jl_module_t*)b->value);
}
}
}
}
}
}
// serialize information about all of the modules accessible directly from Main
void jl_serialize_mod_list(ios_t *s)
{
jl_module_t *m = jl_main_module;
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 &&
b->value && b->constp &&
jl_is_module(b->value) &&
!module_in_worklist((jl_module_t*)b->value)) {
jl_module_t *child = (jl_module_t*)b->value;
if (child->name == b->name) {
// this is the original/primary binding for the submodule
size_t l = strlen(child->name->name);
write_int32(s, l);
ios_write(s, child->name->name, l);
write_uint64(s, child->uuid);
}
}
}
}
write_int32(s, 0);
}
// --- deserialize ---
static jl_fptr_t jl_deserialize_fptr(ios_t *s)
{
int fptr = read_uint16(s);
if (fptr < 2)
return NULL;
if (fptr >= sizeof(id_to_fptrs)/sizeof(*id_to_fptrs))
jl_error("unknown function pointer ID");
return id_to_fptrs[fptr];
}
static jl_value_t *jl_deserialize_datatype(ios_t *s, int pos, jl_value_t **loc)
{
int tag = read_uint8(s);
if (tag == 6 || tag == 7) {
jl_typename_t *name = (jl_typename_t*)jl_deserialize_value(s, NULL);
jl_value_t *dtv = name->primary;
if (tag == 7) {
jl_svec_t *parameters = (jl_svec_t*)jl_deserialize_value(s, NULL);
dtv = jl_apply_type(dtv, parameters);
}
backref_list.items[pos] = dtv;
return dtv;
}
uint16_t nf = read_uint16(s);
size_t size = read_int32(s);
uint8_t flags = read_uint8(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);
assert(tree_literal_values==NULL && mode != MODE_AST);
backref_list.items[pos] = dt;
dt->size = size;
dt->struct_decl = NULL;
dt->instance = NULL;
dt->ditype = NULL;
dt->abstract = flags&1;
dt->mutabl = (flags>>1)&1;
dt->pointerfree = (flags>>2)&1;
if (!dt->abstract) {
dt->ninitialized = read_uint16(s);
dt->uid = mode != MODE_MODULE && mode != MODE_MODULE_POSTWORK ? read_int32(s) : 0;