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Adding labels to disasm.

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This commit is contained in:
Alex Shinn 2011-11-01 22:40:36 +09:00
parent 1913a29c1a
commit 4230ef17e3
1 changed files with 56 additions and 3 deletions
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59
lib/chibi/disasm.c
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@ -27,8 +27,9 @@ static void sexp_write_integer (sexp ctx, sexp_sint_t n, sexp out) {
}
static sexp disasm (sexp ctx, sexp self, sexp bc, sexp out, int depth) {
sexp tmp=NULL;
unsigned char *ip, opcode, i;
sexp tmp=NULL;
sexp_sint_t *labels, label=1, off;
if (sexp_procedurep(bc)) {
bc = sexp_procedure_code(bc);
@ -53,11 +54,53 @@ static sexp disasm (sexp ctx, sexp self, sexp bc, sexp out, int depth) {
sexp_write_pointer(ctx, bc, out);
sexp_newline(ctx, out);
labels = calloc(sexp_bytecode_length(bc), sizeof(sexp_sint_t));
ip = sexp_bytecode_data(bc);
while (ip - sexp_bytecode_data(bc) < sexp_bytecode_length(bc)) {
switch (*ip++) {
case SEXP_OP_JUMP:
case SEXP_OP_JUMP_UNLESS:
off = ip - sexp_bytecode_data(bc) + ((sexp_sint_t*)ip)[0];
if (off > 0 && off < sexp_bytecode_length(bc) && labels[off] == 0)
labels[off] = label++;
case SEXP_OP_CALL:
case SEXP_OP_CLOSURE_REF:
case SEXP_OP_GLOBAL_KNOWN_REF:
case SEXP_OP_GLOBAL_REF:
case SEXP_OP_LOCAL_REF:
case SEXP_OP_LOCAL_SET:
case SEXP_OP_PARAMETER_REF:
case SEXP_OP_PUSH:
case SEXP_OP_RESERVE:
case SEXP_OP_STACK_REF:
case SEXP_OP_TAIL_CALL:
case SEXP_OP_TYPEP:
ip += sizeof(sexp);
break;
case SEXP_OP_SLOT_REF:
case SEXP_OP_SLOT_SET:
case SEXP_OP_MAKE:
ip += sizeof(sexp)*2;
break;
case SEXP_OP_MAKE_PROCEDURE:
ip += sizeof(sexp)*3;
break;
}
}
ip = sexp_bytecode_data(bc);
loop:
for (i=0; i<(depth*SEXP_DISASM_PAD_WIDTH); i++)
sexp_write_char(ctx, ' ', out);
if (labels[ip - sexp_bytecode_data(bc)] == 0) {
sexp_write_string(ctx, " ", out);
} else {
sexp_write_char(ctx, 'L', out);
sexp_write_integer(ctx, labels[ip - sexp_bytecode_data(bc)], out);
sexp_write_string(ctx, ": ", out);
if (labels[ip - sexp_bytecode_data(bc)] < 10)
sexp_write_char(ctx, ' ', out);
}
opcode = *ip++;
if (opcode*sizeof(char*) < sizeof(reverse_opcode_names)) {
sexp_write_char(ctx, ' ', out);
@ -73,13 +116,21 @@ static sexp disasm (sexp ctx, sexp self, sexp bc, sexp out, int depth) {
case SEXP_OP_LOCAL_REF:
case SEXP_OP_LOCAL_SET:
case SEXP_OP_CLOSURE_REF:
case SEXP_OP_JUMP:
case SEXP_OP_JUMP_UNLESS:
case SEXP_OP_TYPEP:
case SEXP_OP_RESERVE:
sexp_write_integer(ctx, ((sexp_sint_t*)ip)[0], out);
ip += sizeof(sexp);
break;
case SEXP_OP_JUMP:
case SEXP_OP_JUMP_UNLESS:
sexp_write_integer(ctx, ((sexp_sint_t*)ip)[0], out);
off = ip - sexp_bytecode_data(bc) + ((sexp_sint_t*)ip)[0];
if (off > 0 && off < sexp_bytecode_length(bc) && labels[off] > 0) {
sexp_write_string(ctx, " L", out);
sexp_write_integer(ctx, labels[off], out);
}
ip += sizeof(sexp);
break;
case SEXP_OP_FCALL0:
case SEXP_OP_FCALL1:
case SEXP_OP_FCALL2:
@ -129,6 +180,8 @@ static sexp disasm (sexp ctx, sexp self, sexp bc, sexp out, int depth) {
disasm(ctx, self, tmp, out, depth+1);
if (ip - sexp_bytecode_data(bc) < sexp_bytecode_length(bc))
goto loop;
free(labels);
return SEXP_VOID;
}