static int
print_op(fmtfn_t to, void *to_arg, int op, int size, BeamInstr* addr)
{
int i;
BeamInstr tag;
char* sign;
char* start_prog; /* Start of program for packer. */
char* prog; /* Current position in packer program. */
BeamInstr stack[8]; /* Stack for packer. */
BeamInstr* sp = stack; /* Points to next free position. */
BeamInstr packed = 0; /* Accumulator for packed operations. */
BeamInstr args[8]; /* Arguments for this instruction. */
BeamInstr* ap; /* Pointer to arguments. */
BeamInstr* unpacked; /* Unpacked arguments */
BeamInstr* first_arg; /* First argument */
start_prog = opc[op].pack;
if (start_prog[0] == '\0') {
/*
* There is no pack program.
* Avoid copying because instructions containing bignum operands
* are bigger than actually declared.
*/
addr++;
ap = addr;
} else {
#if defined(ARCH_64) && defined(CODE_MODEL_SMALL)
BeamInstr instr_word = addr[0];
#endif
addr++;
/*
* Copy all arguments to a local buffer for the unpacking.
*/
ASSERT(size <= sizeof(args)/sizeof(args[0]));
ap = args;
for (i = 0; i < size; i++) {
*ap++ = addr[i];
}
/*
* Undo any packing done by the loader. This is easily done by running
* the packing program backwards and in reverse.
*/
prog = start_prog + sys_strlen(start_prog);
while (start_prog < prog) {
prog--;
switch (*prog) {
case 'f':
case 'g':
case 'q':
*ap++ = *--sp;
break;
#ifdef ARCH_64
case '1': /* Tightest shift */
*ap++ = (packed & BEAM_TIGHTEST_MASK) << 3;
packed >>= BEAM_TIGHTEST_SHIFT;
break;
#endif
case '2': /* Tight shift */
*ap++ = packed & BEAM_TIGHT_MASK;
packed >>= BEAM_TIGHT_SHIFT;
break;
case '3': /* Loose shift */
*ap++ = packed & BEAM_LOOSE_MASK;
packed >>= BEAM_LOOSE_SHIFT;
break;
#ifdef ARCH_64
case '4': /* Shift 32 steps */
*ap++ = packed & BEAM_WIDE_MASK;
packed >>= BEAM_WIDE_SHIFT;
break;
#endif
case 'p':
*sp++ = *--ap;
break;
case 'P':
packed = *--sp;
break;
#if defined(ARCH_64) && defined(CODE_MODEL_SMALL)
case '#': /* -1 */
case '$': /* -2 */
case '%': /* -3 */
case '&': /* -4 */
case '\'': /* -5 */
case '(': /* -6 */
packed = (packed << BEAM_WIDE_SHIFT) | BeamExtraData(instr_word);
break;
#endif
default:
erts_exit(ERTS_ERROR_EXIT, "beam_debug: invalid packing op: %c\n", *prog);
}
}
ap = args;
}
first_arg = ap;
/*
* Print the name and all operands of the instructions.
*/
erts_print(to, to_arg, "%s ", opc[op].name);
sign = opc[op].sign;
while (*sign) {
switch (*sign) {
case 'r': /* x(0) */
erts_print(to, to_arg, "r(0)");
break;
case 'x': /* x(N) */
{
Uint n = ap[0] / sizeof(Eterm);
erts_print(to, to_arg, "x(%d)", n);
ap++;
}
break;
case 'y': /* y(N) */
{
Uint n = ap[0] / sizeof(Eterm) - CP_SIZE;
erts_print(to, to_arg, "y(%d)", n);
ap++;
}
break;
case 'n': /* Nil */
erts_print(to, to_arg, "[]");
break;
case 'S': /* Register */
{
Uint reg_type = (*ap & 1) ? 'y' : 'x';
Uint n = ap[0] / sizeof(Eterm);
erts_print(to, to_arg, "%c(%d)", reg_type, n);
ap++;
break;
}
case 's': /* Any source (tagged constant or register) */
tag = loader_tag(*ap);
if (tag == LOADER_X_REG) {
erts_print(to, to_arg, "x(%d)", loader_x_reg_index(*ap));
ap++;
break;
} else if (tag == LOADER_Y_REG) {
erts_print(to, to_arg, "y(%d)", loader_y_reg_index(*ap) - CP_SIZE);
ap++;
break;
}
/*FALLTHROUGH*/
case 'a': /* Tagged atom */
case 'i': /* Tagged integer */
case 'c': /* Tagged constant */
case 'q': /* Tagged literal */
erts_print(to, to_arg, "%T", (Eterm) *ap);
ap++;
break;
case 'A':
erts_print(to, to_arg, "%d", arityval( (Eterm) ap[0]));
ap++;
break;
case 'd': /* Destination (x(0), x(N), y(N)) */
if (*ap & 1) {
erts_print(to, to_arg, "y(%d)",
*ap / sizeof(Eterm) - CP_SIZE);
} else {
erts_print(to, to_arg, "x(%d)",
*ap / sizeof(Eterm));
}
ap++;
break;
case 't': /* Untagged integers */
case 'I':
case 'W':
switch (op) {
case op_i_gc_bif1_jWstd:
case op_i_gc_bif2_jWtssd:
case op_i_gc_bif3_jWtssd:
{
const ErtsGcBif* p;
BifFunction gcf = (BifFunction) *ap;
for (p = erts_gc_bifs; p->bif != 0; p++) {
if (p->gc_bif == gcf) {
print_bif_name(to, to_arg, p->bif);
break;
}
}
if (p->bif == 0) {
erts_print(to, to_arg, "%d", (Uint)gcf);
}
break;
}
case op_i_make_fun_Wt:
if (*sign == 'W') {
ErlFunEntry* fe = (ErlFunEntry *) *ap;
ErtsCodeMFA* cmfa = find_function_from_pc(fe->address);
erts_print(to, to_arg, "%T:%T/%bpu", cmfa->module,
cmfa->function, cmfa->arity);
} else {
erts_print(to, to_arg, "%d", *ap);
}
break;
case op_i_bs_match_string_xfWW:
if (ap - first_arg < 3) {
erts_print(to, to_arg, "%d", *ap);
} else {
Uint bits = ap[-1];
Uint bytes = (bits+7)/8;
byte* str = (byte *) *ap;
print_byte_string(to, to_arg, str, bytes);
}
break;
case op_bs_put_string_WW:
if (ap - first_arg == 0) {
erts_print(to, to_arg, "%d", *ap);
} else {
Uint bytes = ap[-1];
byte* str = (byte *) ap[0];
print_byte_string(to, to_arg, str, bytes);
}
break;
default:
erts_print(to, to_arg, "%d", *ap);
}
ap++;
break;
case 'f': /* Destination label */
switch (op) {
case op_catch_yf:
erts_print(to, to_arg, "f(" HEXF ")", catch_pc((BeamInstr)*ap));
break;
default:
{
BeamInstr* target = f_to_addr(addr, op, ap);
ErtsCodeMFA* cmfa = find_function_from_pc(target);
if (!cmfa || erts_codemfa_to_code(cmfa) != target) {
erts_print(to, to_arg, "f(" HEXF ")", target);
} else {
erts_print(to, to_arg, "%T:%T/%bpu", cmfa->module,
cmfa->function, cmfa->arity);
}
ap++;
}
break;
}
break;
case 'p': /* Pointer (to label) */
{
BeamInstr* target = f_to_addr(addr, op, ap);
erts_print(to, to_arg, "p(" HEXF ")", target);
ap++;
}
break;
case 'j': /* Pointer (to label) */
if (*ap == 0) {
erts_print(to, to_arg, "j(0)");
} else {
BeamInstr* target = f_to_addr(addr, op, ap);
erts_print(to, to_arg, "j(" HEXF ")", target);
}
ap++;
break;
case 'e': /* Export entry */
{
Export* ex = (Export *) *ap;
erts_print(to, to_arg,
"%T:%T/%bpu", (Eterm) ex->info.mfa.module,
(Eterm) ex->info.mfa.function,
ex->info.mfa.arity);
ap++;
}
break;
case 'F': /* Function definition */
break;
case 'b':
print_bif_name(to, to_arg, (BifFunction) *ap);
ap++;
break;
case 'P': /* Byte offset into tuple (see beam_load.c) */
case 'Q': /* Like 'P', but packable */
erts_print(to, to_arg, "%d", (*ap / sizeof(Eterm)) - 1);
ap++;
break;
case 'l': /* fr(N) */
erts_print(to, to_arg, "fr(%d)", loader_reg_index(ap[0]));
ap++;
break;
default:
erts_print(to, to_arg, "???");
ap++;
break;
}
erts_print(to, to_arg, " ");
sign++;
}
/*
* Print more information about certain instructions.
*/
unpacked = ap;
ap = addr + size;
/*
* In the code below, never use ap[-1], ap[-2], ...
* (will not work if the arguments have been packed).
*
* Instead use unpacked[-1], unpacked[-2], ...
*/
switch (op) {
case op_i_select_val_lins_xfI:
case op_i_select_val_lins_yfI:
case op_i_select_val_bins_xfI:
case op_i_select_val_bins_yfI:
{
int n = unpacked[-1];
int ix = n;
Sint32* jump_tab = (Sint32 *)(ap + n);
while (ix--) {
erts_print(to, to_arg, "%T ", (Eterm) ap[0]);
ap++;
size++;
}
ix = n;
while (ix--) {
BeamInstr* target = f_to_addr_packed(addr, op, jump_tab);
erts_print(to, to_arg, "f(" HEXF ") ", target);
jump_tab++;
}
size += (n+1) / 2;
}
break;
case op_i_select_tuple_arity_xfI:
case op_i_select_tuple_arity_yfI:
{
int n = unpacked[-1];
int ix = n - 1; /* without sentinel */
Sint32* jump_tab = (Sint32 *)(ap + n);
while (ix--) {
Uint arity = arityval(ap[0]);
erts_print(to, to_arg, "{%d} ", arity, ap[1]);
ap++;
size++;
}
/* print sentinel */
erts_print(to, to_arg, "{%T} ", ap[0], ap[1]);
ap++;
size++;
ix = n;
while (ix--) {
BeamInstr* target = f_to_addr_packed(addr, op, jump_tab);
erts_print(to, to_arg, "f(" HEXF ") ", target);
jump_tab++;
}
size += (n+1) / 2;
}
break;
case op_i_select_val2_xfcc:
case op_i_select_val2_yfcc:
case op_i_select_tuple_arity2_xfAA:
case op_i_select_tuple_arity2_yfAA:
{
Sint32* jump_tab = (Sint32 *) ap;
BeamInstr* target;
int i;
for (i = 0; i < 2; i++) {
target = f_to_addr_packed(addr, op, jump_tab++);
erts_print(to, to_arg, "f(" HEXF ") ", target);
}
size += 1;
}
break;
case op_i_jump_on_val_xfIW:
case op_i_jump_on_val_yfIW:
{
int n = unpacked[-2];
Sint32* jump_tab = (Sint32 *) ap;
size += (n+1) / 2;
while (n-- > 0) {
BeamInstr* target = f_to_addr_packed(addr, op, jump_tab);
erts_print(to, to_arg, "f(" HEXF ") ", target);
jump_tab++;
}
}
break;
case op_i_jump_on_val_zero_xfI:
case op_i_jump_on_val_zero_yfI:
{
int n = unpacked[-1];
Sint32* jump_tab = (Sint32 *) ap;
size += (n+1) / 2;
while (n-- > 0) {
BeamInstr* target = f_to_addr_packed(addr, op, jump_tab);
erts_print(to, to_arg, "f(" HEXF ") ", target);
jump_tab++;
}
}
break;
case op_i_put_tuple_xI:
case op_i_put_tuple_yI:
case op_new_map_dtI:
case op_update_map_assoc_sdtI:
case op_update_map_exact_jsdtI:
{
int n = unpacked[-1];
while (n > 0) {
switch (loader_tag(ap[0])) {
case LOADER_X_REG:
erts_print(to, to_arg, " x(%d)", loader_x_reg_index(ap[0]));
break;
case LOADER_Y_REG:
erts_print(to, to_arg, " y(%d)", loader_y_reg_index(ap[0]) - CP_SIZE);
break;
default:
erts_print(to, to_arg, " %T", (Eterm) ap[0]);
break;
}
ap++, size++, n--;
}
}
break;
case op_i_new_small_map_lit_dtq:
{
Eterm *tp = tuple_val(unpacked[-1]);
int n = arityval(*tp);
while (n > 0) {
switch (loader_tag(ap[0])) {
case LOADER_X_REG:
erts_print(to, to_arg, " x(%d)", loader_x_reg_index(ap[0]));
break;
case LOADER_Y_REG:
erts_print(to, to_arg, " y(%d)", loader_y_reg_index(ap[0]) - CP_SIZE);
break;
default:
erts_print(to, to_arg, " %T", (Eterm) ap[0]);
break;
}
ap++, size++, n--;
}
}
break;
case op_i_get_map_elements_fsI:
{
int n = unpacked[-1];
while (n > 0) {
if (n % 3 == 1) {
erts_print(to, to_arg, " %X", ap[0]);
} else {
switch (loader_tag(ap[0])) {
case LOADER_X_REG:
erts_print(to, to_arg, " x(%d)", loader_x_reg_index(ap[0]));
break;
case LOADER_Y_REG:
erts_print(to, to_arg, " y(%d)", loader_y_reg_index(ap[0]) - CP_SIZE);
break;
default:
erts_print(to, to_arg, " %T", (Eterm) ap[0]);
break;
}
}
ap++, size++, n--;
}
}
break;
}
erts_print(to, to_arg, "\n");
return size;
}
static int
print_op(int to, void *to_arg, int op, int size, BeamInstr* addr)
{
int i;
BeamInstr tag;
char* sign;
char* start_prog; /* Start of program for packer. */
char* prog; /* Current position in packer program. */
BeamInstr stack[8]; /* Stack for packer. */
BeamInstr* sp = stack; /* Points to next free position. */
BeamInstr packed = 0; /* Accumulator for packed operations. */
BeamInstr args[8]; /* Arguments for this instruction. */
BeamInstr* ap; /* Pointer to arguments. */
BeamInstr* unpacked; /* Unpacked arguments */
start_prog = opc[op].pack;
if (start_prog[0] == '\0') {
/*
* There is no pack program.
* Avoid copying because instructions containing bignum operands
* are bigger than actually declared.
*/
ap = (BeamInstr *) addr;
} else {
/*
* Copy all arguments to a local buffer for the unpacking.
*/
ASSERT(size <= sizeof(args)/sizeof(args[0]));
ap = args;
for (i = 0; i < size; i++) {
*ap++ = addr[i];
}
/*
* Undo any packing done by the loader. This is easily done by running
* the packing program backwards and in reverse.
*/
prog = start_prog + strlen(start_prog);
while (start_prog < prog) {
prog--;
switch (*prog) {
case 'g':
*ap++ = *--sp;
break;
case 'i': /* Initialize packing accumulator. */
*ap++ = packed;
break;
case 's':
*ap++ = packed & 0x3ff;
packed >>= 10;
break;
case '0': /* Tight shift */
*ap++ = packed & (BEAM_TIGHT_MASK / sizeof(Eterm));
packed >>= BEAM_TIGHT_SHIFT;
break;
case '6': /* Shift 16 steps */
*ap++ = packed & BEAM_LOOSE_MASK;
packed >>= BEAM_LOOSE_SHIFT;
break;
#ifdef ARCH_64
case 'w': /* Shift 32 steps */
*ap++ = packed & BEAM_WIDE_MASK;
packed >>= BEAM_WIDE_SHIFT;
break;
#endif
case 'p':
*sp++ = *--ap;
break;
case 'P':
packed = *--sp;
break;
default:
ASSERT(0);
}
}
ap = args;
}
/*
* Print the name and all operands of the instructions.
*/
erts_print(to, to_arg, "%s ", opc[op].name);
sign = opc[op].sign;
while (*sign) {
switch (*sign) {
case 'r': /* x(0) */
erts_print(to, to_arg, "r(0)");
break;
case 'x': /* x(N) */
{
Uint n = ap[0] / sizeof(Eterm);
erts_print(to, to_arg, "x(%d)", n);
ap++;
}
break;
case 'y': /* y(N) */
{
Uint n = ap[0] / sizeof(Eterm) - CP_SIZE;
erts_print(to, to_arg, "y(%d)", n);
ap++;
}
break;
case 'n': /* Nil */
erts_print(to, to_arg, "[]");
break;
case 's': /* Any source (tagged constant or register) */
tag = loader_tag(*ap);
if (tag == LOADER_X_REG) {
erts_print(to, to_arg, "x(%d)", loader_x_reg_index(*ap));
ap++;
break;
} else if (tag == LOADER_Y_REG) {
erts_print(to, to_arg, "y(%d)", loader_y_reg_index(*ap) - CP_SIZE);
ap++;
break;
}
/*FALLTHROUGH*/
case 'a': /* Tagged atom */
case 'i': /* Tagged integer */
case 'c': /* Tagged constant */
case 'q': /* Tagged literal */
erts_print(to, to_arg, "%T", (Eterm) *ap);
ap++;
break;
case 'A':
erts_print(to, to_arg, "%d", arityval( (Eterm) ap[0]));
ap++;
break;
case 'd': /* Destination (x(0), x(N), y(N)) */
if (*ap & 1) {
erts_print(to, to_arg, "y(%d)",
*ap / sizeof(Eterm) - CP_SIZE);
} else {
erts_print(to, to_arg, "x(%d)",
*ap / sizeof(Eterm));
}
ap++;
break;
case 'I': /* Untagged integer. */
case 't':
erts_print(to, to_arg, "%d", *ap);
ap++;
break;
case 'f': /* Destination label */
{
BeamInstr* f = find_function_from_pc((BeamInstr *)*ap);
if (f+3 != (BeamInstr *) *ap) {
erts_print(to, to_arg, "f(" HEXF ")", *ap);
} else {
erts_print(to, to_arg, "%T:%T/%bpu", (Eterm) f[0], (Eterm) f[1], f[2]);
}
ap++;
}
break;
case 'p': /* Pointer (to label) */
{
BeamInstr* f = find_function_from_pc((BeamInstr *)*ap);
if (f+3 != (BeamInstr *) *ap) {
erts_print(to, to_arg, "p(" HEXF ")", *ap);
} else {
erts_print(to, to_arg, "%T:%T/%bpu", (Eterm) f[0], (Eterm) f[1], f[2]);
}
ap++;
}
break;
case 'j': /* Pointer (to label) */
erts_print(to, to_arg, "j(" HEXF ")", *ap);
ap++;
break;
case 'e': /* Export entry */
{
Export* ex = (Export *) *ap;
erts_print(to, to_arg,
"%T:%T/%bpu", (Eterm) ex->code[0], (Eterm) ex->code[1], ex->code[2]);
ap++;
}
break;
case 'F': /* Function definition */
break;
case 'b':
for (i = 0; i < BIF_SIZE; i++) {
BifFunction bif = (BifFunction) *ap;
if (bif == bif_table[i].f) {
break;
}
}
if (i == BIF_SIZE) {
erts_print(to, to_arg, "b(%d)", (Uint) *ap);
} else {
Eterm name = bif_table[i].name;
unsigned arity = bif_table[i].arity;
erts_print(to, to_arg, "%T/%u", name, arity);
}
ap++;
break;
case 'P': /* Byte offset into tuple (see beam_load.c) */
case 'Q': /* Like 'P', but packable */
erts_print(to, to_arg, "%d", (*ap / sizeof(Eterm)) - 1);
ap++;
break;
case 'l': /* fr(N) */
erts_print(to, to_arg, "fr(%d)", loader_reg_index(ap[0]));
ap++;
break;
default:
erts_print(to, to_arg, "???");
ap++;
break;
}
erts_print(to, to_arg, " ");
sign++;
}
/*
* Print more information about certain instructions.
*/
unpacked = ap;
ap = addr + size;
switch (op) {
case op_i_select_val_lins_xfI:
case op_i_select_val_lins_yfI:
{
int n = ap[-1];
int ix = n;
while (ix--) {
erts_print(to, to_arg, "%T ", (Eterm) ap[0]);
ap++;
size++;
}
ix = n;
while (ix--) {
erts_print(to, to_arg, "f(" HEXF ") ", (Eterm) ap[0]);
ap++;
size++;
}
}
break;
case op_i_select_val_bins_xfI:
case op_i_select_val_bins_yfI:
{
int n = ap[-1];
while (n > 0) {
erts_print(to, to_arg, "%T f(" HEXF ") ", (Eterm) ap[0], ap[1]);
ap += 2;
size += 2;
n--;
}
}
break;
case op_i_select_tuple_arity_xfI:
case op_i_select_tuple_arity_yfI:
{
int n = ap[-1];
int ix = n - 1; /* without sentinel */
while (ix--) {
Uint arity = arityval(ap[0]);
erts_print(to, to_arg, "{%d} ", arity, ap[1]);
ap++;
size++;
}
/* print sentinel */
erts_print(to, to_arg, "{%T} ", ap[0], ap[1]);
ap++;
size++;
ix = n;
while (ix--) {
erts_print(to, to_arg, "f(" HEXF ") ", ap[0]);
ap++;
size++;
}
}
break;
case op_i_jump_on_val_xfII:
case op_i_jump_on_val_yfII:
{
int n;
for (n = ap[-2]; n > 0; n--) {
erts_print(to, to_arg, "f(" HEXF ") ", ap[0]);
ap++;
size++;
}
}
break;
case op_i_jump_on_val_zero_xfI:
case op_i_jump_on_val_zero_yfI:
{
int n;
for (n = ap[-1]; n > 0; n--) {
erts_print(to, to_arg, "f(" HEXF ") ", ap[0]);
ap++;
size++;
}
}
break;
case op_i_put_tuple_xI:
case op_i_put_tuple_yI:
case op_new_map_dII:
case op_update_map_assoc_jsdII:
case op_update_map_exact_jsdII:
{
int n = unpacked[-1];
while (n > 0) {
switch (loader_tag(ap[0])) {
case LOADER_X_REG:
erts_print(to, to_arg, " x(%d)", loader_x_reg_index(ap[0]));
break;
case LOADER_Y_REG:
erts_print(to, to_arg, " x(%d)", loader_y_reg_index(ap[0]));
break;
default:
erts_print(to, to_arg, " %T", (Eterm) ap[0]);
break;
}
ap++, size++, n--;
}
}
break;
case op_i_get_map_elements_fsI:
{
int n = unpacked[-1];
while (n > 0) {
if (n % 3 == 1) {
erts_print(to, to_arg, " %X", ap[0]);
} else {
switch (loader_tag(ap[0])) {
case LOADER_X_REG:
erts_print(to, to_arg, " x(%d)", loader_x_reg_index(ap[0]));
break;
case LOADER_Y_REG:
erts_print(to, to_arg, " y(%d)", loader_y_reg_index(ap[0]));
break;
default:
erts_print(to, to_arg, " %T", (Eterm) ap[0]);
break;
}
}
ap++, size++, n--;
}
}
break;
}
erts_print(to, to_arg, "\n");
return size;
}