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showbc: Make code object start pointer semi-public. 

This allows to pring either absolute addresses or relative offsets in jumps
and code references.
This commit is contained in:
Paul Sokolovsky 2014-12-28 21:34:45 +02:00
parent 749575097f
commit df103462dc
1 changed files with 18 additions and 18 deletions
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36
py/showbc.c
View File

@ -57,10 +57,10 @@
ip += sizeof(mp_uint_t); \ ip += sizeof(mp_uint_t); \
} while (0) } while (0)
static const byte *ip_start; const byte *mp_showbc_code_start;
void mp_bytecode_print(const void *descr, mp_uint_t n_total_args, const byte *ip, mp_uint_t len) { void mp_bytecode_print(const void *descr, mp_uint_t n_total_args, const byte *ip, mp_uint_t len) {
ip_start = ip; mp_showbc_code_start = ip;
// get code info size // get code info size
const byte *code_info = ip; const byte *code_info = ip;
@ -78,7 +78,7 @@ void mp_bytecode_print(const void *descr, mp_uint_t n_total_args, const byte *ip
if (i > 0 && i % 16 == 0) { if (i > 0 && i % 16 == 0) {
printf("\n"); printf("\n");
} }
printf(" %02x", ip_start[i]); printf(" %02x", mp_showbc_code_start[i]);
} }
printf("\n"); printf("\n");
@ -106,12 +106,12 @@ void mp_bytecode_print(const void *descr, mp_uint_t n_total_args, const byte *ip
uint local_num = *ip++; uint local_num = *ip++;
printf("(INIT_CELL %u)\n", local_num); printf("(INIT_CELL %u)\n", local_num);
} }
len -= ip - ip_start; len -= ip - mp_showbc_code_start;
} }
// print out line number info // print out line number info
{ {
mp_int_t bc = (ip_start + code_info_size) - ip; // start counting from the prelude mp_int_t bc = (mp_showbc_code_start + code_info_size) - ip; // start counting from the prelude
mp_uint_t source_line = 1; mp_uint_t source_line = 1;
printf(" bc=" INT_FMT " line=" UINT_FMT "\n", bc, source_line); printf(" bc=" INT_FMT " line=" UINT_FMT "\n", bc, source_line);
for (const byte* ci = code_info; *ci;) { for (const byte* ci = code_info; *ci;) {
@ -294,32 +294,32 @@ const byte *mp_bytecode_print_str(const byte *ip) {
case MP_BC_JUMP: case MP_BC_JUMP:
DECODE_SLABEL; DECODE_SLABEL;
printf("JUMP " UINT_FMT, ip + unum - ip_start); printf("JUMP " UINT_FMT, ip + unum - mp_showbc_code_start);
break; break;
case MP_BC_POP_JUMP_IF_TRUE: case MP_BC_POP_JUMP_IF_TRUE:
DECODE_SLABEL; DECODE_SLABEL;
printf("POP_JUMP_IF_TRUE " INT_FMT, ip + unum - ip_start); printf("POP_JUMP_IF_TRUE " INT_FMT, ip + unum - mp_showbc_code_start);
break; break;
case MP_BC_POP_JUMP_IF_FALSE: case MP_BC_POP_JUMP_IF_FALSE:
DECODE_SLABEL; DECODE_SLABEL;
printf("POP_JUMP_IF_FALSE " INT_FMT, ip + unum - ip_start); printf("POP_JUMP_IF_FALSE " INT_FMT, ip + unum - mp_showbc_code_start);
break; break;
case MP_BC_JUMP_IF_TRUE_OR_POP: case MP_BC_JUMP_IF_TRUE_OR_POP:
DECODE_SLABEL; DECODE_SLABEL;
printf("JUMP_IF_TRUE_OR_POP " INT_FMT, ip + unum - ip_start); printf("JUMP_IF_TRUE_OR_POP " INT_FMT, ip + unum - mp_showbc_code_start);
break; break;
case MP_BC_JUMP_IF_FALSE_OR_POP: case MP_BC_JUMP_IF_FALSE_OR_POP:
DECODE_SLABEL; DECODE_SLABEL;
printf("JUMP_IF_FALSE_OR_POP " INT_FMT, ip + unum - ip_start); printf("JUMP_IF_FALSE_OR_POP " INT_FMT, ip + unum - mp_showbc_code_start);
break; break;
case MP_BC_SETUP_WITH: case MP_BC_SETUP_WITH:
DECODE_ULABEL; // loop-like labels are always forward DECODE_ULABEL; // loop-like labels are always forward
printf("SETUP_WITH " UINT_FMT, ip + unum - ip_start); printf("SETUP_WITH " UINT_FMT, ip + unum - mp_showbc_code_start);
break; break;
case MP_BC_WITH_CLEANUP: case MP_BC_WITH_CLEANUP:
@ -328,18 +328,18 @@ const byte *mp_bytecode_print_str(const byte *ip) {
case MP_BC_UNWIND_JUMP: case MP_BC_UNWIND_JUMP:
DECODE_SLABEL; DECODE_SLABEL;
printf("UNWIND_JUMP " UINT_FMT " %d", ip + unum - ip_start, *ip); printf("UNWIND_JUMP " UINT_FMT " %d", ip + unum - mp_showbc_code_start, *ip);
ip += 1; ip += 1;
break; break;
case MP_BC_SETUP_EXCEPT: case MP_BC_SETUP_EXCEPT:
DECODE_ULABEL; // except labels are always forward DECODE_ULABEL; // except labels are always forward
printf("SETUP_EXCEPT " UINT_FMT, ip + unum - ip_start); printf("SETUP_EXCEPT " UINT_FMT, ip + unum - mp_showbc_code_start);
break; break;
case MP_BC_SETUP_FINALLY: case MP_BC_SETUP_FINALLY:
DECODE_ULABEL; // except labels are always forward DECODE_ULABEL; // except labels are always forward
printf("SETUP_FINALLY " UINT_FMT, ip + unum - ip_start); printf("SETUP_FINALLY " UINT_FMT, ip + unum - mp_showbc_code_start);
break; break;
case MP_BC_END_FINALLY: case MP_BC_END_FINALLY:
@ -356,7 +356,7 @@ const byte *mp_bytecode_print_str(const byte *ip) {
case MP_BC_FOR_ITER: case MP_BC_FOR_ITER:
DECODE_ULABEL; // the jump offset if iteration finishes; for labels are always forward DECODE_ULABEL; // the jump offset if iteration finishes; for labels are always forward
printf("FOR_ITER " UINT_FMT, ip + unum - ip_start); printf("FOR_ITER " UINT_FMT, ip + unum - mp_showbc_code_start);
break; break;
case MP_BC_POP_BLOCK: case MP_BC_POP_BLOCK:
@ -522,9 +522,9 @@ const byte *mp_bytecode_print_str(const byte *ip) {
} }
void mp_bytecode_print2(const byte *ip, mp_uint_t len) { void mp_bytecode_print2(const byte *ip, mp_uint_t len) {
ip_start = ip; mp_showbc_code_start = ip;
while (ip - ip_start < len) { while (ip - mp_showbc_code_start < len) {
printf("%02u ", (uint)(ip - ip_start)); printf("%02u ", (uint)(ip - mp_showbc_code_start));
ip = mp_bytecode_print_str(ip); ip = mp_bytecode_print_str(ip);
printf("\n"); printf("\n");
} }