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working on try-catch implementation

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This commit is contained in:
hyung-hwan 2021-04-11 15:45:01 +00:00
parent 5537e1850a
commit cb917ff44b
2 changed files with 13 additions and 27 deletions
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36
lib/comp.c
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@ -1129,7 +1129,6 @@ static int compile_break (hcl_t* hcl, hcl_cnode_t* src)
return -1;
}
for (i = hcl->c->cblk.depth; i > hcl->c->fnblk.info[hcl->c->fnblk.depth].cblk_base; --i)
{
if (hcl->c->cblk.info[i]._type == HCL_CBLK_TYPE_LOOP)
@ -1139,6 +1138,7 @@ static int compile_break (hcl_t* hcl, hcl_cnode_t* src)
else if (hcl->c->cblk.info[i]._type == HCL_CBLK_TYPE_TRY)
{
/*must emit an instruction to exit from the try loop.*/
if (emit_byte_instruction(hcl, HCL_CODE_TRY_EXIT, HCL_CNODE_GET_LOC(src)) <= -1) return -1;
}
}
@ -1903,7 +1903,7 @@ static int compile_try (hcl_t* hcl, hcl_cnode_t* src)
return 0;
}
static HCL_INLINE int patch_nearest_post_try (hcl_t* hcl)
static HCL_INLINE int patch_nearest_post_try (hcl_t* hcl, hcl_ooi_t* catch_skip_jip)
{
hcl_ooi_t jip, block_code_size;
hcl_cframe_t* cf;
@ -1925,9 +1925,11 @@ static HCL_INLINE int patch_nearest_post_try (hcl_t* hcl)
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_NIL, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
}
/*jump_inst_pos = hcl-.code.bc.len; */
if (emit_byte_instruction(hcl, HCL_CODE_TRY_EXIT, HCL_CNODE_GET_LOC(cf->operand)) <= -1)
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_FORWARD_0, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(cmd)) <= -1) return -1;
if (emit_byte_instruction(hcl, HCL_CODE_TRY_EXIT, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
*catch_skip_jip = hcl->code.bc.len;
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 */
block_code_size = hcl->code.bc.len - jip - (HCL_CODE_LONG_PARAM_SIZE + 1);
@ -1987,15 +1989,10 @@ static HCL_INLINE int compile_catch (hcl_t* hcl)
return -1;
}
patch_nearest_post_try (hcl);
patch_nearest_post_try (hcl, &jump_inst_pos);
/* TODO: HCL_TRAIT_INTERACTIVE??? */
/* TODO: nargs -> 1 ntmprs -> 1 */
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);
@ -2008,8 +2005,8 @@ static HCL_INLINE int compile_catch (hcl_t* hcl)
static HCL_INLINE int post_try (hcl_t* hcl)
{
/* TODO: */
pop_cblk (hcl);
POP_CFRAME (hcl);
return 0;
}
@ -2024,7 +2021,7 @@ static HCL_INLINE int post_catch (hcl_t* hcl)
HCL_ASSERT (hcl, cf->opcode == COP_POST_CATCH);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
jip = cf->u.post_try_catch.jump_inst_pos;
jip = cf->u.post_try_catch.jump_inst_pos; /* jump instruction position between the try block and the catch block */
/* 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);
@ -2037,24 +2034,13 @@ static HCL_INLINE int post_catch (hcl_t* hcl)
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
if (emit_byte_instruction(hcl, HCL_CODE_TRY_CATCH, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
#endif
#if 0
/*hcl->c->fnblk.depth--; */
pop_cblk (hcl);
#endif
patch_long_jump (hcl, jip, block_code_size); /* patch the jump between the try block and the catch block */
POP_CFRAME (hcl);
return 0;

4
lib/exec.c
View File

@ -3121,7 +3121,7 @@ static int execute (hcl_t* hcl)
/* -------------------------------------------------------- */
case HCL_CODE_TRY_ENTER:
FETCH_PARAM_CODE_TO (hcl, b1);
LOG_INST_0 (hcl, "try_enter %zu", b1);
LOG_INST_1 (hcl, "try_enter %zu", b1);
#if 0
if (call_try_catch(hcl) <= -1)
{
@ -3133,7 +3133,7 @@ static int execute (hcl_t* hcl)
case HCL_CODE_TRY_ENTER2:
FETCH_PARAM_CODE_TO (hcl, b1);
LOG_INST_0 (hcl, "try_enter2 %zu", b1);
LOG_INST_1 (hcl, "try_enter2 %zu", b1);
case HCL_CODE_TRY_EXIT:
LOG_INST_0 (hcl, "try_exit");