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fix issue in mini-loader (#353)

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Xu Jun 2020-08-14 19:58:19 +08:00 committed by GitHub
parent 1266ebb222
commit 6b5f376e79
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1 changed files with 54 additions and 21 deletions
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75
core/iwasm/interpreter/wasm_mini_loader.c
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@ -3116,6 +3116,9 @@ wasm_loader_emit_br_info(WASMLoaderContext *ctx, BranchBlock *frame_csp,
* d) each arity value's src frame offset
* e) each arity values's dst dynamic offset
* f) branch target address
*
* Note: b-e are omitted when arity is 0 so that
* interpreter can recover the br info quickly.
*/
BlockType *block_type = &frame_csp->block_type;
uint8 *types = NULL, cell;
@ -3134,27 +3137,30 @@ wasm_loader_emit_br_info(WASMLoaderContext *ctx, BranchBlock *frame_csp,
/* Part a */
emit_uint32(ctx, arity);
/* Part b */
emit_uint32(ctx, wasm_get_cell_num(types, arity));
/* Part c */
for (i = (int32)arity - 1; i >= 0; i--) {
cell = wasm_value_type_cell_num(types[i]);
emit_byte(ctx, cell);
}
/* Part d */
for (i = (int32)arity - 1; i >= 0; i--) {
cell = wasm_value_type_cell_num(types[i]);
frame_offset -= cell;
emit_operand(ctx, *(int16*)(frame_offset));
}
/* Part e */
dynamic_offset = frame_csp->dynamic_offset
+ wasm_get_cell_num(types, arity);
for (i = (int32)arity - 1; i >= 0; i--) {
cell = wasm_value_type_cell_num(types[i]);
dynamic_offset -= cell;
emit_operand(ctx, dynamic_offset);
if (arity) {
/* Part b */
emit_uint32(ctx, wasm_get_cell_num(types, arity));
/* Part c */
for (i = (int32)arity - 1; i >= 0; i--) {
cell = wasm_value_type_cell_num(types[i]);
emit_byte(ctx, cell);
}
/* Part d */
for (i = (int32)arity - 1; i >= 0; i--) {
cell = wasm_value_type_cell_num(types[i]);
frame_offset -= cell;
emit_operand(ctx, *(int16*)(frame_offset));
}
/* Part e */
dynamic_offset = frame_csp->dynamic_offset
+ wasm_get_cell_num(types, arity);
for (i = (int32)arity - 1; i >= 0; i--) {
cell = wasm_value_type_cell_num(types[i]);
dynamic_offset -= cell;
emit_operand(ctx, dynamic_offset);
}
}
/* Part f */
@ -3578,6 +3584,33 @@ reserve_block_ret(WASMLoaderContext *loader_ctx,
return_count = block_type_get_result_types(block_type, &return_types);
/* If there is only one return value, use EXT_OP_COPY_STACK_TOP/_I64 instead
* of EXT_OP_COPY_STACK_VALUES for interpreter performance. */
if (return_count == 1) {
uint8 cell = wasm_value_type_cell_num(return_types[0]);
if (block->dynamic_offset != *(loader_ctx->frame_offset - cell)) {
/* insert op_copy before else opcode */
if (opcode == WASM_OP_ELSE)
skip_label();
emit_label(cell == 1 ? EXT_OP_COPY_STACK_TOP : EXT_OP_COPY_STACK_TOP_I64);
emit_operand(loader_ctx, *(loader_ctx->frame_offset - cell));
emit_operand(loader_ctx, block->dynamic_offset);
if (opcode == WASM_OP_ELSE) {
*(loader_ctx->frame_offset - cell) = block->dynamic_offset;
}
else {
loader_ctx->frame_offset -= cell;
loader_ctx->dynamic_offset = block->dynamic_offset;
PUSH_OFFSET_TYPE(return_types[0]);
wasm_loader_emit_backspace(loader_ctx, sizeof(int16));
}
if (opcode == WASM_OP_ELSE)
emit_label(opcode);
}
return true;
}
/* Copy stack top values to block's results which are in dynamic space.
* The instruction format:
* Part a: values count
@ -5498,7 +5531,7 @@ handle_op_block_and_loop:
goto fail;
}
func_const_end = func->consts + func->const_cell_num * 4;
// reverse the const buf
/* reverse the const buf */
for (int i = loader_ctx->num_const - 1; i >= 0; i--) {
Const *c = (Const*)(loader_ctx->const_buf + i * sizeof(Const));
if (c->value_type == VALUE_TYPE_F64