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enhancing the compiler to support (try ... catch ...)

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hyung-hwan
2021-02-22 09:20:45 +00:00
parent 2eb5fd7824
commit 593b0ad98c
2 changed files with 495 additions and 333 deletions
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819
hcl/lib/comp.c
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@ -794,11 +794,11 @@ enum
COP_COMPILE_DIC_LIST,
COP_COMPILE_QLIST, /* compile data list */
COP_SUBCOMPILE_ELIF,
COP_SUBCOMPILE_ELSE,
COP_SUBCOMPILE_CATCH,
COP_SUBCOMPILE_AND_EXPR,
COP_SUBCOMPILE_OR_EXPR,
COP_COMPILE_AND_EXPR,
COP_COMPILE_OR_EXPR,
COP_COMPILE_ELIF,
COP_COMPILE_ELSE,
COP_COMPILE_CATCH,
COP_EMIT_CALL,
@ -826,6 +826,9 @@ enum
COP_POST_WHILE_BODY,
COP_POST_WHILE_COND,
COP_POST_TRY,
COP_POST_CATCH,
COP_POST_LAMBDA,
COP_POST_AND_EXPR,
COP_POST_OR_EXPR,
@ -861,11 +864,73 @@ static int compile_and (hcl_t* hcl, hcl_cnode_t* src)
obj = HCL_CNODE_CONS_CDR(obj);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT, expr); /* 1 */
if (obj) PUSH_SUBCFRAME (hcl, COP_SUBCOMPILE_AND_EXPR, obj); /* 2 */
if (obj) PUSH_SUBCFRAME (hcl, COP_COMPILE_AND_EXPR, obj); /* 2 */
return 0;
}
static HCL_INLINE int compile_and_expr (hcl_t* hcl)
{
hcl_cnode_t* obj, * expr;
hcl_cframe_t* cf;
hcl_ooi_t jump_inst_pos;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_COMPILE_AND_EXPR);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
/* TODO: optimization - eat away all true expressions */
obj = cf->operand;
if (!HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in and");
return -1;
}
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jump_inst_pos = hcl->code.bc.len;
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_FORWARD_IF_FALSE, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
if (emit_byte_instruction(hcl, HCL_CODE_POP_STACKTOP, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
expr = HCL_CNODE_CONS_CAR(obj);
obj = HCL_CNODE_CONS_CDR(obj);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT, expr); /* 1 */
PUSH_SUBCFRAME (hcl, COP_POST_AND_EXPR, expr); /* 3 */
cf = GET_SUBCFRAME(hcl);
cf->u.post_and.jump_inst_pos = jump_inst_pos;
if (obj) PUSH_SUBCFRAME (hcl, COP_COMPILE_AND_EXPR, obj); /* 2 */
return 0;
}
static HCL_INLINE int post_and_expr (hcl_t* hcl)
{
hcl_cframe_t* cf;
hcl_ooi_t jip;
hcl_oow_t jump_offset;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_POST_AND_EXPR);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jip = cf->u.post_and.jump_inst_pos;
/* patch the jump insruction emitted after each expression inside the 'and' expression */
jump_offset = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
patch_long_jump (hcl, jip, jump_offset);
POP_CFRAME(hcl);
return 0;
}
/* ========================================================================= */
static int compile_or (hcl_t* hcl, hcl_cnode_t* src)
{
hcl_cnode_t* obj, * expr;
@ -892,11 +957,76 @@ static int compile_or (hcl_t* hcl, hcl_cnode_t* src)
obj = HCL_CNODE_CONS_CDR(obj);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT, expr); /* 1 */
PUSH_SUBCFRAME (hcl, COP_SUBCOMPILE_OR_EXPR, obj); /* 2 */
PUSH_SUBCFRAME (hcl, COP_COMPILE_OR_EXPR, obj); /* 2 */
return 0;
}
static HCL_INLINE int compile_or_expr (hcl_t* hcl)
{
hcl_cnode_t* obj, * expr;
hcl_cframe_t* cf;
hcl_ooi_t jump_inst_pos;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_COMPILE_OR_EXPR);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
/* TODO: optimization - eat away all false expressions */
obj = cf->operand;
if (!HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in or");
return -1;
}
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jump_inst_pos = hcl->code.bc.len;
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_FORWARD_IF_TRUE, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
if (emit_byte_instruction(hcl, HCL_CODE_POP_STACKTOP, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
expr = HCL_CNODE_CONS_CAR(obj);
obj = HCL_CNODE_CONS_CDR(obj);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT, expr); /* 1 */
PUSH_SUBCFRAME (hcl, COP_POST_OR_EXPR, expr); /* 3 */
cf = GET_SUBCFRAME(hcl);
cf->u.post_or.jump_inst_pos = jump_inst_pos;
if (obj) PUSH_SUBCFRAME (hcl, COP_COMPILE_OR_EXPR, obj); /* 2 */
return 0;
}
static HCL_INLINE int post_or_expr (hcl_t* hcl)
{
hcl_cframe_t* cf;
hcl_ooi_t jip;
hcl_oow_t jump_offset;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_POST_OR_EXPR);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jip = cf->u.post_or.jump_inst_pos;
/* patch the jump insruction emitted after each expression inside the 'and' expression */
jump_offset = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
patch_long_jump (hcl, jip, jump_offset);
POP_CFRAME(hcl);
return 0;
}
/* ========================================================================= */
static int compile_break (hcl_t* hcl, hcl_cnode_t* src)
{
/* (break) */
@ -957,6 +1087,32 @@ static int compile_break (hcl_t* hcl, hcl_cnode_t* src)
return -1;
}
static int post_break (hcl_t* hcl)
{
hcl_cframe_t* cf;
hcl_ooi_t jip, jump_offset;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_POST_BREAK);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
jip = cf->u._break.jump_inst_pos;;
/* HCL_CODE_LONG_PARAM_SIZE + 1 => size of the long JUMP_FORWARD instruction */
jump_offset = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
/* no explicit about jump_offset. because break can only place inside
* a loop, the same check in post_while_body() must assert
* this break jump_offset to be small enough */
HCL_ASSERT (hcl, jump_offset <= MAX_CODE_JUMP * 2);
patch_long_jump (hcl, jip, jump_offset);
POP_CFRAME (hcl);
return 0;
}
/* ========================================================================= */
static int compile_continue (hcl_t* hcl, hcl_cnode_t* src)
{
/* (continue) */
@ -1006,6 +1162,7 @@ static int compile_continue (hcl_t* hcl, hcl_cnode_t* src)
return -1;
}
/* ========================================================================= */
static int compile_do (hcl_t* hcl, hcl_cnode_t* src)
{
@ -1041,6 +1198,8 @@ static int compile_do (hcl_t* hcl, hcl_cnode_t* src)
return 0;
}
/* ========================================================================= */
static int compile_if (hcl_t* hcl, hcl_cnode_t* src)
{
hcl_cnode_t* cmd, * obj, * cond;
@ -1091,6 +1250,131 @@ static int compile_if (hcl_t* hcl, hcl_cnode_t* src)
return 0;
}
static HCL_INLINE int patch_nearest_post_if_body (hcl_t* hcl, hcl_cnode_t* cmd)
{
hcl_ooi_t jump_inst_pos, body_pos;
hcl_ooi_t jip, jump_offset;
hcl_cframe_t* cf;
cf = find_cframe_from_top(hcl, COP_POST_IF_BODY);
HCL_ASSERT (hcl, cf != HCL_NULL);
HCL_ASSERT (hcl, cf->opcode == COP_POST_IF_BODY);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
/* jump instruction position of the JUMP_FORWARD_IF_FALSE after the conditional of the previous if or elif*/
jip = cf->u.post_if.jump_inst_pos;
if (hcl->code.bc.len <= cf->u.post_if.body_pos)
{
/* the if body is empty. */
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_NIL, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
}
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jump_inst_pos = hcl->code.bc.len;
/* emit jump_forward before the beginning of the else block.
* this is to make the earlier if or elif block to skip
* the else part. it is to be patched in post_else_body(). */
if (emit_single_param_instruction (hcl, HCL_CODE_JUMP_FORWARD_0, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
/* HCL_CODE_LONG_PARAM_SIZE + 1 => size of the long JUMP_FORWARD instruction */
jump_offset = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
if (jump_offset > MAX_CODE_JUMP * 2)
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_IFFLOOD, HCL_CNODE_GET_LOC(cmd), HCL_NULL, "code in %.*js too big - size %zu", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd), jump_offset);
return -1;
}
patch_long_jump (hcl, jip, jump_offset);
/* beginning of the elif/else block code */
/* to drop the result of the conditional when the conditional is false */
if (emit_byte_instruction (hcl, HCL_CODE_POP_STACKTOP, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
/* this is the actual beginning */
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
body_pos = hcl->code.bc.len;
/* modify the POST_IF_BODY frame */
HCL_ASSERT (hcl, cf->opcode == COP_POST_IF_BODY);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
cf->u.post_if.body_pos = body_pos;
cf->u.post_if.jump_inst_pos = jump_inst_pos;
return 0;
}
static HCL_INLINE int compile_elif (hcl_t* hcl)
{
hcl_cnode_t* cmd, * obj, * cond, * src;
hcl_cframe_t* cf;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_COMPILE_ELIF);
src = cf->operand;
HCL_ASSERT (hcl, HCL_CNODE_IS_CONS(src));
HCL_ASSERT (hcl, HCL_CNODE_IS_SYMBOL_SYNCODED(HCL_CNODE_CONS_CAR(src), HCL_SYNCODE_ELIF));
cmd = HCL_CNODE_CONS_CAR(src);
obj = HCL_CNODE_CONS_CDR(src);
if (!obj)
{
/* no value */
hcl_setsynerrbfmt (hcl, HCL_SYNERR_ARGCOUNT, HCL_CNODE_GET_LOC(src), HCL_NULL, "no condition in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
else if (!HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
cond = HCL_CNODE_CONS_CAR(obj);
obj = HCL_CNODE_CONS_CDR(obj);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT, cond); /* 1 */
PUSH_SUBCFRAME (hcl, COP_POST_IF_COND, obj); /* 2 */
cf = GET_SUBCFRAME(hcl);
cf->u.post_if.body_pos = -1; /* unknown yet */
cf->u.post_if.jump_inst_pos = -1; /* not needed */
cf->u.post_if.start_loc = *HCL_CNODE_GET_LOC(src);
return patch_nearest_post_if_body(hcl, cmd);
}
static HCL_INLINE int compile_else (hcl_t* hcl)
{
hcl_cnode_t* cmd, * obj, * src;
hcl_cframe_t* cf;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_COMPILE_ELSE);
src = cf->operand;
HCL_ASSERT (hcl, HCL_CNODE_IS_CONS(src));
HCL_ASSERT (hcl, HCL_CNODE_IS_SYMBOL_SYNCODED(HCL_CNODE_CONS_CAR(src), HCL_SYNCODE_ELSE));
cmd = HCL_CNODE_CONS_CAR(src);
obj = HCL_CNODE_CONS_CDR(src);
if (obj && !HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
else
{
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT_LIST, obj);
}
return patch_nearest_post_if_body(hcl, cmd);
}
/* ========================================================================= */
static int compile_lambda (hcl_t* hcl, hcl_cnode_t* src, int defun)
{
hcl_cnode_t* cmd, * obj, * args;
@ -1288,7 +1572,7 @@ static int compile_lambda (hcl_t* hcl, hcl_cnode_t* src, int defun)
if (hcl->c->blk.depth == HCL_TYPE_MAX(hcl_ooi_t))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKDEPTH, HCL_CNODE_GET_LOC(src), HCL_NULL, "lambda block depth too deep in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKDEPTH, HCL_CNODE_GET_LOC(src), HCL_NULL, "block depth too deep in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
hcl->c->blk.depth++;
@ -1455,9 +1739,11 @@ static int compile_set (hcl_t* hcl, hcl_cnode_t* src)
return 0;
}
/* ========================================================================= */
static int compile_try (hcl_t* hcl, hcl_cnode_t* src)
{
hcl_cnode_t* cmd, * obj, * cond;
hcl_cnode_t* cmd, * obj;
hcl_cframe_t* cf;
hcl_ooi_t jump_inst_pos;
@ -1488,18 +1774,187 @@ static int compile_try (hcl_t* hcl, hcl_cnode_t* src)
return -1;
}
/* TODO: allow local temporary variables?? */
if (hcl->c->blk.depth == HCL_TYPE_MAX(hcl_ooi_t))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKDEPTH, HCL_CNODE_GET_LOC(src), HCL_NULL, "block depth too deep in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
hcl->c->blk.depth++;
/* TODO: HCL_TRAIT_INTERACTIVE??? */
if (emit_double_param_instruction(hcl, HCL_CODE_MAKE_BLOCK, 0, 0, HCL_CNODE_GET_LOC(cmd)) <= -1) return -1;
jump_inst_pos = hcl->code.bc.len;
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_FORWARD_0, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(cmd)) <= -1) return -1;
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_TRY_OBJECT_LIST, obj); /* 1*/
PUSH_SUBCFRAME (hcl, COP_EMIT_LAMBDA, src); /* 2 */
PUSH_SUBCFRAME (hcl, COP_POST_TRY, cmd); /* 2 */
cf = GET_SUBCFRAME(hcl);
cf->u.lambda.jump_inst_pos = jump_inst_pos;
cf->u.post_try_catch.jump_inst_pos = jump_inst_pos;
return 0;
}
static HCL_INLINE int patch_nearest_post_try (hcl_t* hcl)
{
hcl_ooi_t jip, block_code_size;
hcl_cframe_t* cf;
cf = find_cframe_from_top(hcl, COP_POST_TRY);
HCL_ASSERT (hcl, cf != HCL_NULL);
HCL_ASSERT (hcl, cf->opcode == COP_POST_TRY);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
jip = cf->u.post_try_catch.jump_inst_pos;
/* HCL_CODE_LONG_PARAM_SIZE + 1 => size of the long JUMP_FORWARD instruction */
block_code_size = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
if (block_code_size == 0)
{
/* no body in try */
/* TODO: is this correct??? */
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_NIL, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
block_code_size++;
}
if (emit_byte_instruction(hcl, HCL_CODE_RETURN_FROM_BLOCK, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
block_code_size++;
if (block_code_size > MAX_CODE_JUMP * 2)
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKFLOOD, HCL_CNODE_GET_LOC(cf->operand), HCL_NULL, "code too big - size %zu", block_code_size);
return -1;
}
patch_long_jump (hcl, jip, block_code_size);
#if 0
/* beginning of the elif/else block code */
/* to drop the result of the conditional when the conditional is false */
if (emit_byte_instruction (hcl, HCL_CODE_POP_STACKTOP, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
#endif
#if 0
/* this is the actual beginning */
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
body_pos = hcl->code.bc.len;
/* modify the POST_TRY frame */
HCL_ASSERT (hcl, cf->opcode == COP_POST_TRY);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
cf->u.post_try_catch.body_pos = body_pos;
cf->u.post_try_catch.jump_inst_pos = jump_inst_pos;
#endif
return 0;
}
static HCL_INLINE int compile_catch (hcl_t* hcl)
{
hcl_cnode_t* cmd, * obj, * src;
hcl_cframe_t* cf;
hcl_ooi_t jump_inst_pos;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_COMPILE_CATCH);
src = cf->operand;
HCL_ASSERT (hcl, HCL_CNODE_IS_CONS(src));
HCL_ASSERT (hcl, HCL_CNODE_IS_SYMBOL_SYNCODED(HCL_CNODE_CONS_CAR(src), HCL_SYNCODE_CATCH));
cmd = HCL_CNODE_CONS_CAR(src);
obj = HCL_CNODE_CONS_CDR(src);
if (!obj)
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_ARGCOUNT, HCL_CNODE_GET_LOC(src), HCL_NULL, "no condition in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
else if (!HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
patch_nearest_post_try (hcl);
/* TODO: HCL_TRAIT_INTERACTIVE??? */
if (emit_double_param_instruction(hcl, HCL_CODE_MAKE_BLOCK, 0, 0, HCL_CNODE_GET_LOC(cmd)) <= -1) return -1;
jump_inst_pos = hcl->code.bc.len;
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_FORWARD_0, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(cmd)) <= -1) return -1;
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT_LIST, obj);
PUSH_SUBCFRAME (hcl, COP_POST_CATCH, cmd);
cf = GET_SUBCFRAME(hcl);
cf->u.post_try_catch.jump_inst_pos = jump_inst_pos;
return 0;
}
static HCL_INLINE int post_try (hcl_t* hcl)
{
/* TODO: */
POP_CFRAME (hcl);
return 0;
}
static HCL_INLINE int post_catch (hcl_t* hcl)
{
hcl_ooi_t jip, block_code_size;
hcl_cframe_t* cf;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf != HCL_NULL);
HCL_ASSERT (hcl, cf->opcode == COP_POST_CATCH);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
jip = cf->u.post_try_catch.jump_inst_pos;
/* HCL_CODE_LONG_PARAM_SIZE + 1 => size of the long JUMP_FORWARD instruction */
block_code_size = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
if (block_code_size == 0)
{
/* no body in try */
/* TODO: is this correct??? */
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_NIL, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
block_code_size++;
}
if (emit_byte_instruction(hcl, HCL_CODE_RETURN_FROM_BLOCK, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
block_code_size++;
if (block_code_size > MAX_CODE_JUMP * 2)
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BLKFLOOD, HCL_CNODE_GET_LOC(cf->operand), HCL_NULL, "code too big - size %zu", block_code_size);
return -1;
}
patch_long_jump (hcl, jip, block_code_size);
#if 0
/* beginning of the elif/else block code */
/* to drop the result of the conditional when the conditional is false */
if (emit_byte_instruction (hcl, HCL_CODE_POP_STACKTOP, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
#endif
/* TODO: activate two blocks with special frame arrangement..EMIT_CALL for try...catch... with 2 args???*/
hcl->c->blk.depth--;
POP_CFRAME (hcl);
return 0;
}
/* ========================================================================= */
static int compile_while (hcl_t* hcl, hcl_cnode_t* src, int next_cop)
{
/* (while (xxxx) ... )
@ -2256,12 +2711,12 @@ static int compile_object_list (hcl_t* hcl)
{
if (HCL_CNODE_IS_SYMBOL_SYNCODED(car, HCL_SYNCODE_ELIF))
{
SWITCH_TOP_CFRAME (hcl, COP_SUBCOMPILE_ELIF, oprnd);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_ELIF, oprnd);
goto done;
}
else if (HCL_CNODE_IS_SYMBOL_SYNCODED(car, HCL_SYNCODE_ELSE))
{
SWITCH_TOP_CFRAME (hcl, COP_SUBCOMPILE_ELSE, oprnd);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_ELSE, oprnd);
goto done;
}
}
@ -2269,7 +2724,7 @@ static int compile_object_list (hcl_t* hcl)
{
if (HCL_CNODE_IS_SYMBOL_SYNCODED(car, HCL_SYNCODE_CATCH))
{
SWITCH_TOP_CFRAME (hcl, COP_SUBCOMPILE_CATCH, oprnd);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_CATCH, oprnd);
goto done;
}
}
@ -2501,288 +2956,6 @@ static int compile_qlist (hcl_t* hcl)
/* ========================================================================= */
static HCL_INLINE int patch_nearest_post_if_body (hcl_t* hcl, hcl_cnode_t* cmd)
{
hcl_ooi_t jump_inst_pos, body_pos;
hcl_ooi_t jip, jump_offset;
hcl_cframe_t* cf;
cf = find_cframe_from_top(hcl, COP_POST_IF_BODY);
HCL_ASSERT (hcl, cf != HCL_NULL);
HCL_ASSERT (hcl, cf->opcode == COP_POST_IF_BODY);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
/* jump instruction position of the JUMP_FORWARD_IF_FALSE after the conditional of the previous if or elif*/
jip = cf->u.post_if.jump_inst_pos;
if (hcl->code.bc.len <= cf->u.post_if.body_pos)
{
/* the if body is empty. */
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_NIL, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
}
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jump_inst_pos = hcl->code.bc.len;
/* emit jump_forward before the beginning of the else block.
* this is to make the earlier if or elif block to skip
* the else part. it is to be patched in post_else_body(). */
if (emit_single_param_instruction (hcl, HCL_CODE_JUMP_FORWARD_0, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
/* HCL_CODE_LONG_PARAM_SIZE + 1 => size of the long JUMP_FORWARD instruction */
jump_offset = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
if (jump_offset > MAX_CODE_JUMP * 2)
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_IFFLOOD, HCL_CNODE_GET_LOC(cmd), HCL_NULL, "code in %.*js too big - size %zu", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd), jump_offset);
return -1;
}
patch_long_jump (hcl, jip, jump_offset);
/* beginning of the elif/else block code */
/* to drop the result of the conditional when the conditional is false */
if (emit_byte_instruction (hcl, HCL_CODE_POP_STACKTOP, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
/* this is the actual beginning */
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
body_pos = hcl->code.bc.len;
/* modify the POST_IF_BODY frame */
HCL_ASSERT (hcl, cf->opcode == COP_POST_IF_BODY);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
cf->u.post_if.body_pos = body_pos;
cf->u.post_if.jump_inst_pos = jump_inst_pos;
return 0;
}
static HCL_INLINE int subcompile_elif (hcl_t* hcl)
{
hcl_cnode_t* cmd, * obj, * cond, * src;
hcl_cframe_t* cf;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_SUBCOMPILE_ELIF);
src = cf->operand;
HCL_ASSERT (hcl, HCL_CNODE_IS_CONS(src));
HCL_ASSERT (hcl, HCL_CNODE_IS_SYMBOL_SYNCODED(HCL_CNODE_CONS_CAR(src), HCL_SYNCODE_ELIF));
cmd = HCL_CNODE_CONS_CAR(src);
obj = HCL_CNODE_CONS_CDR(src);
if (!obj)
{
/* no value */
hcl_setsynerrbfmt (hcl, HCL_SYNERR_ARGCOUNT, HCL_CNODE_GET_LOC(src), HCL_NULL, "no condition in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
else if (!HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
cond = HCL_CNODE_CONS_CAR(obj);
obj = HCL_CNODE_CONS_CDR(obj);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT, cond); /* 1 */
PUSH_SUBCFRAME (hcl, COP_POST_IF_COND, obj); /* 2 */
cf = GET_SUBCFRAME(hcl);
cf->u.post_if.body_pos = -1; /* unknown yet */
cf->u.post_if.jump_inst_pos = -1; /* not needed */
cf->u.post_if.start_loc = *HCL_CNODE_GET_LOC(src);
return patch_nearest_post_if_body(hcl, cmd);
}
static HCL_INLINE int subcompile_else (hcl_t* hcl)
{
hcl_cnode_t* cmd, * obj, * src;
hcl_cframe_t* cf;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_SUBCOMPILE_ELSE);
src = cf->operand;
HCL_ASSERT (hcl, HCL_CNODE_IS_CONS(src));
HCL_ASSERT (hcl, HCL_CNODE_IS_SYMBOL_SYNCODED(HCL_CNODE_CONS_CAR(src), HCL_SYNCODE_ELSE));
cmd = HCL_CNODE_CONS_CAR(src);
obj = HCL_CNODE_CONS_CDR(src);
if (obj && !HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
else
{
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT_LIST, obj);
}
return patch_nearest_post_if_body(hcl, cmd);
}
/* ========================================================================= */
static HCL_INLINE int subcompile_catch (hcl_t* hcl)
{
hcl_cnode_t* cmd, * obj, * src;
hcl_cframe_t* cf;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_SUBCOMPILE_CATCH);
src = cf->operand;
HCL_ASSERT (hcl, HCL_CNODE_IS_CONS(src));
HCL_ASSERT (hcl, HCL_CNODE_IS_SYMBOL_SYNCODED(HCL_CNODE_CONS_CAR(src), HCL_SYNCODE_CATCH));
cmd = HCL_CNODE_CONS_CAR(src);
obj = HCL_CNODE_CONS_CDR(src);
if (!obj)
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_ARGCOUNT, HCL_CNODE_GET_LOC(src), HCL_NULL, "no condition in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
else if (!HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT_LIST, obj);
/* TODO: do extra work */
return 0;
}
/* ========================================================================= */
static HCL_INLINE int subcompile_and_expr (hcl_t* hcl)
{
hcl_cnode_t* obj, * expr;
hcl_cframe_t* cf;
hcl_ooi_t jump_inst_pos;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_SUBCOMPILE_AND_EXPR);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
/* TODO: optimization - eat away all true expressions */
obj = cf->operand;
if (!HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in and");
return -1;
}
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jump_inst_pos = hcl->code.bc.len;
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_FORWARD_IF_FALSE, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
if (emit_byte_instruction(hcl, HCL_CODE_POP_STACKTOP, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
expr = HCL_CNODE_CONS_CAR(obj);
obj = HCL_CNODE_CONS_CDR(obj);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT, expr); /* 1 */
PUSH_SUBCFRAME (hcl, COP_POST_AND_EXPR, expr); /* 3 */
cf = GET_SUBCFRAME(hcl);
cf->u.post_and.jump_inst_pos = jump_inst_pos;
if (obj) PUSH_SUBCFRAME (hcl, COP_SUBCOMPILE_AND_EXPR, obj); /* 2 */
return 0;
}
static HCL_INLINE int post_and_expr (hcl_t* hcl)
{
hcl_cframe_t* cf;
hcl_ooi_t jip;
hcl_oow_t jump_offset;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_POST_AND_EXPR);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jip = cf->u.post_and.jump_inst_pos;
/* patch the jump insruction emitted after each expression inside the 'and' expression */
jump_offset = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
patch_long_jump (hcl, jip, jump_offset);
POP_CFRAME(hcl);
return 0;
}
/* ========================================================================= */
static HCL_INLINE int subcompile_or_expr (hcl_t* hcl)
{
hcl_cnode_t* obj, * expr;
hcl_cframe_t* cf;
hcl_ooi_t jump_inst_pos;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_SUBCOMPILE_OR_EXPR);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
/* TODO: optimization - eat away all false expressions */
obj = cf->operand;
if (!HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in or");
return -1;
}
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jump_inst_pos = hcl->code.bc.len;
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_FORWARD_IF_TRUE, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
if (emit_byte_instruction(hcl, HCL_CODE_POP_STACKTOP, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
expr = HCL_CNODE_CONS_CAR(obj);
obj = HCL_CNODE_CONS_CDR(obj);
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT, expr); /* 1 */
PUSH_SUBCFRAME (hcl, COP_POST_OR_EXPR, expr); /* 3 */
cf = GET_SUBCFRAME(hcl);
cf->u.post_or.jump_inst_pos = jump_inst_pos;
if (obj) PUSH_SUBCFRAME (hcl, COP_SUBCOMPILE_OR_EXPR, obj); /* 2 */
return 0;
}
static HCL_INLINE int post_or_expr (hcl_t* hcl)
{
hcl_cframe_t* cf;
hcl_ooi_t jip;
hcl_oow_t jump_offset;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_POST_OR_EXPR);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jip = cf->u.post_or.jump_inst_pos;
/* patch the jump insruction emitted after each expression inside the 'and' expression */
jump_offset = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
patch_long_jump (hcl, jip, jump_offset);
POP_CFRAME(hcl);
return 0;
}
/* ========================================================================= */
static HCL_INLINE int post_if_cond (hcl_t* hcl)
{
hcl_cframe_t* cf, * cf2;
@ -2962,31 +3135,6 @@ static HCL_INLINE int post_while_body (hcl_t* hcl)
return 0;
}
/* ========================================================================= */
static int post_break (hcl_t* hcl)
{
hcl_cframe_t* cf;
hcl_ooi_t jip, jump_offset;
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_POST_BREAK);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
jip = cf->u._break.jump_inst_pos;;
/* HCL_CODE_LONG_PARAM_SIZE + 1 => size of the long JUMP_FORWARD instruction */
jump_offset = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
/* no explicit about jump_offset. because break can only place inside
* a loop, the same check in post_while_body() must assert
* this break jump_offset to be small enough */
HCL_ASSERT (hcl, jump_offset <= MAX_CODE_JUMP * 2);
patch_long_jump (hcl, jip, jump_offset);
POP_CFRAME (hcl);
return 0;
}
/* ========================================================================= */
@ -3386,24 +3534,24 @@ int hcl_compile (hcl_t* hcl, hcl_cnode_t* obj)
if (compile_qlist(hcl) <= -1) goto oops;
break;
case COP_SUBCOMPILE_ELIF:
if (subcompile_elif(hcl) <= -1) goto oops;
case COP_COMPILE_ELIF:
if (compile_elif(hcl) <= -1) goto oops;
break;
case COP_SUBCOMPILE_ELSE:
if (subcompile_else(hcl) <= -1) goto oops;
case COP_COMPILE_ELSE:
if (compile_else(hcl) <= -1) goto oops;
break;
case COP_SUBCOMPILE_CATCH:
if (subcompile_catch(hcl) <= -1) goto oops;
case COP_COMPILE_CATCH:
if (compile_catch(hcl) <= -1) goto oops;
break;
case COP_SUBCOMPILE_AND_EXPR:
if (subcompile_and_expr(hcl) <= -1) goto oops;
case COP_COMPILE_AND_EXPR:
if (compile_and_expr(hcl) <= -1) goto oops;
break;
case COP_SUBCOMPILE_OR_EXPR:
if (subcompile_or_expr(hcl) <= -1) goto oops;
case COP_COMPILE_OR_EXPR:
if (compile_or_expr(hcl) <= -1) goto oops;
break;
case COP_EMIT_CALL:
@ -3484,6 +3632,13 @@ int hcl_compile (hcl_t* hcl, hcl_cnode_t* obj)
if (post_while_cond(hcl) <= -1) goto oops;
break;
case COP_POST_TRY:
if (post_try(hcl) <= -1) goto oops;
break;
case COP_POST_CATCH:
if (post_catch(hcl) <= -1) goto oops;
break;
case COP_POST_LAMBDA:
if (post_lambda(hcl) <= -1) goto oops;
break;

7
hcl/lib/hcl-prv.h
View File

@ -315,6 +315,12 @@ struct hcl_cframe_t
hcl_ooi_t jump_inst_pos;
} post_or;
/* COP_POST_TRY, COP_POST_CATCH */
struct
{
hcl_oow_t jump_inst_pos;
} post_try_catch;
/* COP_COMPILE_ARRAY_LIST, COP_POP_INTO_ARRAY, COP_EMIT_MAKE_ARRAY */
struct
{
@ -333,6 +339,7 @@ struct hcl_cframe_t
hcl_ooi_t index;
} dic_list;
/* COP_EMIT_LAMBDA */
struct
{