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authorBjörn Gustavsson <bjorn@erlang.org>2011-11-10 14:42:47 +0100
committerBjörn Gustavsson <bjorn@erlang.org>2011-11-14 14:47:18 +0100
commit0b27c0ce578db5266dbaaa50a6d116836a03aa94 (patch)
tree9ee2bacc604351671484a9e752e1f096389c3016 /erts
parent4de78fc7542905a519ec52b91769df63f8939952 (diff)
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BEAM loader: Refactor code loading into separate functions
Break apart code loading into the three functions: erts_alloc_loader_state() erts_prepare_loading() erts_finish_loading() The erts_alloc_loader_state() and erts_prepare_loading() can be executed with all schedulers running. Only erts_finish_loading() needs to be run in a single-scheduling system.
Diffstat (limited to 'erts')
-rw-r--r--erts/emulator/beam/beam_load.c340
-rw-r--r--erts/emulator/beam/beam_load.h1
-rw-r--r--erts/emulator/beam/global.h8
3 files changed, 196 insertions, 153 deletions
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c
index cf4c04a135..10ed46417b 100644
--- a/erts/emulator/beam/beam_load.c
+++ b/erts/emulator/beam/beam_load.c
@@ -245,7 +245,7 @@ typedef struct {
* This structure contains all information about the module being loaded.
*/
-typedef struct {
+typedef struct LoaderState {
/*
* The current logical file within the binary.
*/
@@ -494,13 +494,10 @@ typedef struct {
} while (0)
-static Eterm bin_load(Process *c_p, ErtsProcLocks c_p_locks,
- Eterm group_leader, Eterm* modp, byte* bytes, int unloaded_size);
-static void init_state(LoaderState* stp);
static void free_state(LoaderState* stp);
static Eterm insert_new_code(Process *c_p, ErtsProcLocks c_p_locks,
- Eterm group_leader, Eterm module,
- BeamInstr* code, Uint size, BeamInstr catches);
+ Eterm group_leader, Eterm module,
+ BeamInstr* code, Uint size);
static int scan_iff_file(LoaderState* stp, Uint* chunk_types,
Uint num_types, Uint num_mandatory);
static int load_atom_table(LoaderState* stp);
@@ -602,29 +599,17 @@ erts_load_module(Process *c_p,
* On return, contains the actual module name.
*/
byte* code, /* Points to the code to load */
- int size) /* Size of code to load. */
+ Uint size) /* Size of code to load. */
{
- ErlDrvBinary* bin;
- Eterm result;
+ LoaderState* stp = erts_alloc_loader_state();
+ Eterm retval;
- if (size >= 4 && code[0] == 'F' && code[1] == 'O' &&
- code[2] == 'R' && code[3] == '1') {
- /*
- * The BEAM module is not compressed.
- */
- result = bin_load(c_p, c_p_locks, group_leader, modp, code, size);
- } else {
- /*
- * The BEAM module is compressed (or possibly invalid/corrupted).
- */
- if ((bin = (ErlDrvBinary *) erts_gzinflate_buffer((char*)code, size)) == NULL) {
- return am_badfile;
- }
- result = bin_load(c_p, c_p_locks, group_leader, modp,
- (byte*)bin->orig_bytes, bin->orig_size);
- driver_free_binary(bin);
+ retval = erts_prepare_loading(stp, c_p, group_leader, modp,
+ code, size);
+ if (retval != NIL) {
+ return retval;
}
- return result;
+ return erts_finish_loading(stp, c_p, c_p_locks, modp);
}
/* #define LOAD_MEMORY_HARD_DEBUG 1*/
@@ -639,16 +624,30 @@ extern void check_allocated_block(Uint type, void *blk);
#define CHKBLK(TYPE,BLK) /* nothing */
#endif
-static Eterm
-bin_load(Process *c_p, ErtsProcLocks c_p_locks,
- Eterm group_leader, Eterm* modp, byte* bytes, int unloaded_size)
+Eterm
+erts_prepare_loading(LoaderState* stp, Process *c_p, Eterm group_leader,
+ Eterm* modp, byte* code, Uint unloaded_size)
{
- LoaderState state;
Eterm retval = am_badfile;
+ ErlDrvBinary* bin = NULL;
- init_state(&state);
- state.module = *modp;
- state.group_leader = group_leader;
+ stp->module = *modp;
+ stp->group_leader = group_leader;
+
+ /*
+ * Check if the module is compressed (or possibly invalid/corrupted).
+ */
+ if ( !(unloaded_size >= 4 &&
+ code[0] == 'F' && code[1] == 'O' &&
+ code[2] == 'R' && code[3] == '1') ) {
+ bin = (ErlDrvBinary *)
+ erts_gzinflate_buffer((char*)code, unloaded_size);
+ if (bin == NULL) {
+ goto load_error;
+ }
+ code = (byte*)bin->orig_bytes;
+ unloaded_size = bin->orig_size;
+ }
/*
* Scan the IFF file.
@@ -659,11 +658,11 @@ bin_load(Process *c_p, ErtsProcLocks c_p_locks,
#endif
CHKALLOC();
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- state.file_name = "IFF header for Beam file";
- state.file_p = bytes;
- state.file_left = unloaded_size;
- if (!scan_iff_file(&state, chunk_types, NUM_CHUNK_TYPES, NUM_MANDATORY)) {
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ stp->file_name = "IFF header for Beam file";
+ stp->file_p = code;
+ stp->file_left = unloaded_size;
+ if (!scan_iff_file(stp, chunk_types, NUM_CHUNK_TYPES, NUM_MANDATORY)) {
goto load_error;
}
@@ -671,38 +670,38 @@ bin_load(Process *c_p, ErtsProcLocks c_p_locks,
* Read the header for the code chunk.
*/
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- define_file(&state, "code chunk header", CODE_CHUNK);
- if (!read_code_header(&state)) {
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ define_file(stp, "code chunk header", CODE_CHUNK);
+ if (!read_code_header(stp)) {
goto load_error;
}
/*
* Initialize code area.
*/
- state.code_buffer_size = erts_next_heap_size(2048 + state.num_functions, 0);
- state.code = (BeamInstr *) erts_alloc(ERTS_ALC_T_CODE,
- sizeof(BeamInstr) * state.code_buffer_size);
+ stp->code_buffer_size = erts_next_heap_size(2048 + stp->num_functions, 0);
+ stp->code = (BeamInstr *) erts_alloc(ERTS_ALC_T_CODE,
+ sizeof(BeamInstr) * stp->code_buffer_size);
- state.code[MI_NUM_FUNCTIONS] = state.num_functions;
- state.ci = MI_FUNCTIONS + state.num_functions + 1;
+ stp->code[MI_NUM_FUNCTIONS] = stp->num_functions;
+ stp->ci = MI_FUNCTIONS + stp->num_functions + 1;
- state.code[MI_ATTR_PTR] = 0;
- state.code[MI_ATTR_SIZE] = 0;
- state.code[MI_ATTR_SIZE_ON_HEAP] = 0;
- state.code[MI_COMPILE_PTR] = 0;
- state.code[MI_COMPILE_SIZE] = 0;
- state.code[MI_COMPILE_SIZE_ON_HEAP] = 0;
- state.code[MI_NUM_BREAKPOINTS] = 0;
+ stp->code[MI_ATTR_PTR] = 0;
+ stp->code[MI_ATTR_SIZE] = 0;
+ stp->code[MI_ATTR_SIZE_ON_HEAP] = 0;
+ stp->code[MI_COMPILE_PTR] = 0;
+ stp->code[MI_COMPILE_SIZE] = 0;
+ stp->code[MI_COMPILE_SIZE_ON_HEAP] = 0;
+ stp->code[MI_NUM_BREAKPOINTS] = 0;
/*
* Read the atom table.
*/
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- define_file(&state, "atom table", ATOM_CHUNK);
- if (!load_atom_table(&state)) {
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ define_file(stp, "atom table", ATOM_CHUNK);
+ if (!load_atom_table(stp)) {
goto load_error;
}
@@ -710,9 +709,9 @@ bin_load(Process *c_p, ErtsProcLocks c_p_locks,
* Read the import table.
*/
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- define_file(&state, "import table", IMP_CHUNK);
- if (!load_import_table(&state)) {
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ define_file(stp, "import table", IMP_CHUNK);
+ if (!load_import_table(stp)) {
goto load_error;
}
@@ -720,10 +719,10 @@ bin_load(Process *c_p, ErtsProcLocks c_p_locks,
* Read the lambda (fun) table.
*/
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- if (state.chunks[LAMBDA_CHUNK].size > 0) {
- define_file(&state, "lambda (fun) table", LAMBDA_CHUNK);
- if (!read_lambda_table(&state)) {
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ if (stp->chunks[LAMBDA_CHUNK].size > 0) {
+ define_file(stp, "lambda (fun) table", LAMBDA_CHUNK);
+ if (!read_lambda_table(stp)) {
goto load_error;
}
}
@@ -732,10 +731,10 @@ bin_load(Process *c_p, ErtsProcLocks c_p_locks,
* Read the literal table.
*/
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- if (state.chunks[LITERAL_CHUNK].size > 0) {
- define_file(&state, "literals table (constant pool)", LITERAL_CHUNK);
- if (!read_literal_table(&state)) {
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ if (stp->chunks[LITERAL_CHUNK].size > 0) {
+ define_file(stp, "literals table (constant pool)", LITERAL_CHUNK);
+ if (!read_literal_table(stp)) {
goto load_error;
}
}
@@ -744,35 +743,27 @@ bin_load(Process *c_p, ErtsProcLocks c_p_locks,
* Read the line table (if present).
*/
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- if (state.chunks[LINE_CHUNK].size > 0) {
- define_file(&state, "line table", LINE_CHUNK);
- if (!read_line_table(&state)) {
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ if (stp->chunks[LINE_CHUNK].size > 0) {
+ define_file(stp, "line table", LINE_CHUNK);
+ if (!read_line_table(stp)) {
goto load_error;
}
}
/*
- * Since the literal table *may* have contained external
- * funs (containing references to export entries), now is
- * the time to consolidate the export tables.
- */
-
- erts_export_consolidate();
-
- /*
* Load the code chunk.
*/
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- state.file_name = "code chunk";
- state.file_p = state.code_start;
- state.file_left = state.code_size;
- if (!load_code(&state)) {
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ stp->file_name = "code chunk";
+ stp->file_p = stp->code_start;
+ stp->file_left = stp->code_size;
+ if (!load_code(stp)) {
goto load_error;
}
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- if (!freeze_code(&state)) {
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ if (!freeze_code(stp)) {
goto load_error;
}
@@ -782,56 +773,96 @@ bin_load(Process *c_p, ErtsProcLocks c_p_locks,
* loading the code, because it contains labels.)
*/
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- define_file(&state, "export table", EXP_CHUNK);
- if (!read_export_table(&state)) {
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ define_file(stp, "export table", EXP_CHUNK);
+ if (!read_export_table(stp)) {
goto load_error;
}
/*
- * Ready for the final touch: fixing the export table entries for
- * exported and imported functions. This can't fail.
+ * Good so far.
*/
-
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- retval = insert_new_code(c_p, c_p_locks, state.group_leader, state.module,
- state.code, state.loaded_size, state.catches);
+
+ retval = NIL;
+
+ load_error:
+ if (bin) {
+ driver_free_binary(bin);
+ }
+ if (retval != NIL) {
+ free_state(stp);
+ }
+ return retval;
+}
+
+Eterm
+erts_finish_loading(LoaderState* stp, Process* c_p,
+ ErtsProcLocks c_p_locks, Eterm* modp)
+{
+ Eterm retval;
+
+ /*
+ * No other process may run since we will update the export
+ * table which is not protected by any locks.
+ */
+
+ ERTS_SMP_LC_ASSERT(erts_initialized == 0 ||
+ erts_smp_thr_progress_is_blocking());
+
+ /*
+ * Make current code for the module old and insert the new code
+ * as current. This will fail if there already exists old code
+ * for the module.
+ */
+
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ retval = insert_new_code(c_p, c_p_locks, stp->group_leader, stp->module,
+ stp->code, stp->loaded_size);
if (retval != NIL) {
goto load_error;
}
- CHKBLK(ERTS_ALC_T_CODE,state.code);
- final_touch(&state);
+
+ /*
+ * Ready for the final touch: fixing the export table entries for
+ * exported and imported functions. This can't fail.
+ */
+
+ erts_export_consolidate();
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
+ final_touch(stp);
/*
* Loading succeded.
*/
- CHKBLK(ERTS_ALC_T_CODE,state.code);
+ CHKBLK(ERTS_ALC_T_CODE,stp->code);
#if defined(LOAD_MEMORY_HARD_DEBUG) && defined(DEBUG)
erts_fprintf(stderr,"Loaded %T\n",*modp);
#if 0
- debug_dump_code(state.code,state.ci);
+ debug_dump_code(stp->code,stp->ci);
#endif
#endif
- state.code = NULL; /* Prevent code from being freed. */
- *modp = state.module;
+ stp->code = NULL; /* Prevent code from being freed. */
+ *modp = stp->module;
/*
* If there is an on_load function, signal an error to
* indicate that the on_load function must be run.
*/
- if (state.on_load) {
+ if (stp->on_load) {
retval = am_on_load;
}
load_error:
- free_state(&state);
+ free_state(stp);
return retval;
}
-
-static void
-init_state(LoaderState* stp)
+LoaderState*
+erts_alloc_loader_state(void)
{
+ LoaderState* stp;
+
+ stp = erts_alloc(ERTS_ALC_T_LOADER_TMP, sizeof(LoaderState));
stp->function = THE_NON_VALUE; /* Function not known yet */
stp->arity = 0;
stp->specific_op = -1;
@@ -859,6 +890,7 @@ init_state(LoaderState* stp)
stp->line_instr = 0;
stp->func_line = 0;
stp->fname = 0;
+ return stp;
}
static void
@@ -923,12 +955,13 @@ free_state(LoaderState* stp)
if (stp->fname != 0) {
erts_free(ERTS_ALC_T_LOADER_TMP, stp->fname);
}
+ erts_free(ERTS_ALC_T_LOADER_TMP, stp);
}
static Eterm
insert_new_code(Process *c_p, ErtsProcLocks c_p_locks,
Eterm group_leader, Eterm module, BeamInstr* code,
- Uint size, BeamInstr catches)
+ Uint size)
{
Module* modp;
Eterm retval;
@@ -951,7 +984,7 @@ insert_new_code(Process *c_p, ErtsProcLocks c_p_locks,
modp = erts_put_module(module);
modp->code = code;
modp->code_length = size;
- modp->catches = catches;
+ modp->catches = BEAM_CATCHES_NIL; /* Will be filled in later. */
/*
* Update address table (used for finding a function from a PC value).
@@ -3861,7 +3894,6 @@ freeze_code(LoaderState* stp)
unsigned attr_size = stp->chunks[ATTR_CHUNK].size;
unsigned compile_size = stp->chunks[COMPILE_CHUNK].size;
Uint size;
- unsigned catches;
Sint decoded_size;
Uint line_size;
@@ -4116,21 +4148,6 @@ freeze_code(LoaderState* stp)
CHKBLK(ERTS_ALC_T_CODE,code);
/*
- * Fix all catch_yf instructions.
- */
- index = stp->catches;
- catches = BEAM_CATCHES_NIL;
- while (index != 0) {
- BeamInstr next = code[index];
- code[index] = BeamOpCode(op_catch_yf);
- catches = beam_catches_cons((BeamInstr *)code[index+2], catches);
- code[index+2] = make_catch(catches);
- index = next;
- }
- stp->catches = catches;
- CHKBLK(ERTS_ALC_T_CODE,code);
-
- /*
* Save the updated code pointer and code size.
*/
@@ -4155,6 +4172,26 @@ final_touch(LoaderState* stp)
{
int i;
int on_load = stp->on_load;
+ unsigned catches;
+ Uint index;
+ BeamInstr* code = stp->code;
+ Module* modp;
+
+ /*
+ * Allocate catch indices and fix up all catch_yf instructions.
+ */
+
+ index = stp->catches;
+ catches = BEAM_CATCHES_NIL;
+ while (index != 0) {
+ BeamInstr next = code[index];
+ code[index] = BeamOpCode(op_catch_yf);
+ catches = beam_catches_cons((BeamInstr *)code[index+2], catches);
+ code[index+2] = make_catch(catches);
+ index = next;
+ }
+ modp = erts_put_module(stp->module);
+ modp->catches = catches;
/*
* Export functions.
@@ -5692,7 +5729,7 @@ patch_funentries(Eterm Patchlist)
Eterm
erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info)
{
- LoaderState state;
+ LoaderState* stp;
BeamInstr Funcs;
BeamInstr Patchlist;
Eterm* tp;
@@ -5711,10 +5748,10 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info)
Uint size;
/*
- * Must initialize state.lambdas here because the error handling code
+ * Must initialize stp->lambdas here because the error handling code
* at label 'error' uses it.
*/
- init_state(&state);
+ stp = erts_alloc_loader_state();
if (is_not_atom(Mod)) {
goto error;
@@ -5754,31 +5791,31 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info)
* Scan the Beam binary and read the interesting sections.
*/
- state.file_name = "IFF header for Beam file";
- state.file_p = bytes;
- state.file_left = size;
- state.module = Mod;
- state.group_leader = p->group_leader;
- state.num_functions = n;
- if (!scan_iff_file(&state, chunk_types, NUM_CHUNK_TYPES, NUM_MANDATORY)) {
+ stp->file_name = "IFF header for Beam file";
+ stp->file_p = bytes;
+ stp->file_left = size;
+ stp->module = Mod;
+ stp->group_leader = p->group_leader;
+ stp->num_functions = n;
+ if (!scan_iff_file(stp, chunk_types, NUM_CHUNK_TYPES, NUM_MANDATORY)) {
goto error;
}
- define_file(&state, "code chunk header", CODE_CHUNK);
- if (!read_code_header(&state)) {
+ define_file(stp, "code chunk header", CODE_CHUNK);
+ if (!read_code_header(stp)) {
goto error;
}
- define_file(&state, "atom table", ATOM_CHUNK);
- if (!load_atom_table(&state)) {
+ define_file(stp, "atom table", ATOM_CHUNK);
+ if (!load_atom_table(stp)) {
goto error;
}
- define_file(&state, "export table", EXP_CHUNK);
- if (!stub_read_export_table(&state)) {
+ define_file(stp, "export table", EXP_CHUNK);
+ if (!stub_read_export_table(stp)) {
goto error;
}
- if (state.chunks[LAMBDA_CHUNK].size > 0) {
- define_file(&state, "lambda (fun) table", LAMBDA_CHUNK);
- if (!read_lambda_table(&state)) {
+ if (stp->chunks[LAMBDA_CHUNK].size > 0) {
+ define_file(stp, "lambda (fun) table", LAMBDA_CHUNK);
+ if (!read_lambda_table(stp)) {
goto error;
}
}
@@ -5788,8 +5825,8 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info)
*/
code_size = ((WORDS_PER_FUNCTION+1)*n + MI_FUNCTIONS + 2) * sizeof(BeamInstr);
- code_size += state.chunks[ATTR_CHUNK].size;
- code_size += state.chunks[COMPILE_CHUNK].size;
+ code_size += stp->chunks[ATTR_CHUNK].size;
+ code_size += stp->chunks[COMPILE_CHUNK].size;
code = erts_alloc_fnf(ERTS_ALC_T_CODE, code_size);
if (!code) {
goto error;
@@ -5879,12 +5916,12 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info)
*/
info = (byte *) fp;
- info = stub_copy_info(&state, ATTR_CHUNK, info,
+ info = stub_copy_info(stp, ATTR_CHUNK, info,
code+MI_ATTR_PTR, code+MI_ATTR_SIZE_ON_HEAP);
if (info == NULL) {
goto error;
}
- info = stub_copy_info(&state, COMPILE_CHUNK, info,
+ info = stub_copy_info(stp, COMPILE_CHUNK, info,
code+MI_COMPILE_PTR, code+MI_COMPILE_SIZE_ON_HEAP);
if (info == NULL) {
goto error;
@@ -5894,8 +5931,7 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info)
* Insert the module in the module table.
*/
- rval = insert_new_code(p, 0, p->group_leader, Mod, code, code_size,
- BEAM_CATCHES_NIL);
+ rval = insert_new_code(p, 0, p->group_leader, Mod, code, code_size);
if (rval != NIL) {
goto error;
}
@@ -5906,13 +5942,13 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info)
fp = code + ci;
for (i = 0; i < n; i++) {
- stub_final_touch(&state, fp);
+ stub_final_touch(stp, fp);
fp += WORDS_PER_FUNCTION;
}
if (patch_funentries(Patchlist)) {
erts_free_aligned_binary_bytes(temp_alloc);
- free_state(&state);
+ free_state(stp);
if (bin != NULL) {
driver_free_binary(bin);
}
@@ -5920,7 +5956,7 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info)
}
error:
- free_state(&state);
+ free_state(stp);
BIF_ERROR(p, BADARG);
}
diff --git a/erts/emulator/beam/beam_load.h b/erts/emulator/beam/beam_load.h
index 2956bd0add..126d9a3935 100644
--- a/erts/emulator/beam/beam_load.h
+++ b/erts/emulator/beam/beam_load.h
@@ -26,6 +26,7 @@
Eterm beam_make_current_old(Process *c_p, ErtsProcLocks c_p_locks,
Eterm module);
+
typedef struct gen_op_entry {
char* name;
int arity;
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
index 6c75c3876b..9f19172e08 100644
--- a/erts/emulator/beam/global.h
+++ b/erts/emulator/beam/global.h
@@ -866,8 +866,14 @@ typedef struct {
Eterm* fname_ptr; /* Pointer to fname table */
} FunctionInfo;
+struct LoaderState* erts_alloc_loader_state(void);
+Eterm erts_prepare_loading(struct LoaderState*, Process *c_p,
+ Eterm group_leader, Eterm* modp,
+ byte* code, Uint size);
+Eterm erts_finish_loading(struct LoaderState* stp, Process* c_p,
+ ErtsProcLocks c_p_locks, Eterm* modp);
Eterm erts_load_module(Process *c_p, ErtsProcLocks c_p_locks,
- Eterm group_leader, Eterm* mod, byte* code, int size);
+ Eterm group_leader, Eterm* mod, byte* code, Uint size);
void init_load(void);
BeamInstr* find_function_from_pc(BeamInstr* pc);
Eterm* erts_build_mfa_item(FunctionInfo* fi, Eterm* hp,