Remove broken JS_READ_OBJ_ROM_DATA flag (#216)
This JS_ReadObject() flag no longer works for bytecode. The IC opcodes are patched during execution. Fixes: https://github.com/quickjs-ng/quickjs/issues/206 Refs: https://github.com/quickjs-ng/quickjs/pull/120
This commit is contained in:
Ben Noordhuis
GitHub
parent
e5812862f9
commit
ba8b80f112
2 changed files with 16 additions and 37 deletions
29
quickjs.c
29
quickjs.c
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@ -626,8 +626,7 @@ typedef struct JSFunctionBytecode {
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uint8_t super_allowed : 1;
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uint8_t arguments_allowed : 1;
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uint8_t backtrace_barrier : 1; /* stop backtrace on this function */
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uint8_t read_only_bytecode : 1;
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/* XXX: 4 bits available */
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/* XXX: 5 bits available */
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uint8_t *byte_code_buf; /* (self pointer) */
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int byte_code_len;
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JSAtom func_name;
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@ -5770,7 +5769,7 @@ static void compute_bytecode_size(JSFunctionBytecode *b, JSMemoryUsage_helper *h
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if (b->closure_var) {
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js_func_size += b->closure_var_count * sizeof(*b->closure_var);
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}
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if (!b->read_only_bytecode && b->byte_code_buf) {
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if (b->byte_code_buf) {
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hp->js_func_code_size += b->byte_code_len;
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}
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memory_used_count++;
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@ -32117,7 +32116,7 @@ typedef enum BCTagEnum {
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BC_TAG_OBJECT_REFERENCE,
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} BCTagEnum;
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#define BC_VERSION 6
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#define BC_VERSION 7
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typedef struct BCWriterState {
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JSContext *ctx;
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@ -32981,7 +32980,6 @@ typedef struct BCReaderState {
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int error_state;
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BOOL allow_sab : 8;
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BOOL allow_bytecode : 8;
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BOOL is_rom_data : 8;
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BOOL allow_reference : 8;
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/* object references */
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JSObject **objects;
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@ -33213,17 +33211,9 @@ static int JS_ReadFunctionBytecode(BCReaderState *s, JSFunctionBytecode *b,
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JSAtom atom;
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uint32_t idx;
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if (s->is_rom_data) {
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/* directly use the input buffer */
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if (unlikely(s->buf_end - s->ptr < bc_len))
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return bc_read_error_end(s);
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bc_buf = (uint8_t *)s->ptr;
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s->ptr += bc_len;
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} else {
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bc_buf = (void *)((uint8_t*)b + byte_code_offset);
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bc_buf = (uint8_t*)b + byte_code_offset;
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if (bc_get_buf(s, bc_buf, bc_len))
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return -1;
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}
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b->byte_code_buf = bc_buf;
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pos = 0;
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@ -33237,10 +33227,6 @@ static int JS_ReadFunctionBytecode(BCReaderState *s, JSFunctionBytecode *b,
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case OP_FMT_atom_label_u8:
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case OP_FMT_atom_label_u16:
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idx = get_u32(bc_buf + pos + 1);
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if (s->is_rom_data) {
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/* just increment the reference count of the atom */
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JS_DupAtom(s->ctx, (JSAtom)idx);
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} else {
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if (bc_idx_to_atom(s, &atom, idx)) {
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/* Note: the atoms will be freed up to this position */
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b->byte_code_len = pos;
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@ -33250,7 +33236,6 @@ static int JS_ReadFunctionBytecode(BCReaderState *s, JSFunctionBytecode *b,
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#ifdef DUMP_READ_OBJECT
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bc_read_trace(s, "at %d, fixup atom: ", pos + 1); print_atom(s->ctx, atom); printf("\n");
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#endif
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}
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break;
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default:
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break;
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@ -33394,7 +33379,6 @@ static JSValue JS_ReadFunctionTag(BCReaderState *s)
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bc.super_allowed = bc_get_flags(v16, &idx, 1);
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bc.arguments_allowed = bc_get_flags(v16, &idx, 1);
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bc.backtrace_barrier = bc_get_flags(v16, &idx, 1);
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bc.read_only_bytecode = s->is_rom_data;
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if (bc_get_u8(s, &v8))
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goto fail;
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bc.js_mode = v8;
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@ -33425,9 +33409,7 @@ static JSValue JS_ReadFunctionTag(BCReaderState *s)
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closure_var_offset = function_size;
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function_size += bc.closure_var_count * sizeof(*bc.closure_var);
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byte_code_offset = function_size;
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if (!bc.read_only_bytecode) {
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function_size += bc.byte_code_len;
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}
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b = js_mallocz(ctx, function_size);
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if (!b)
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@ -34071,8 +34053,6 @@ static int JS_ReadObjectAtoms(BCReaderState *s)
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if (atom == JS_ATOM_NULL)
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return s->error_state = -1;
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s->idx_to_atom[i] = atom;
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if (s->is_rom_data && (atom != (i + s->first_atom)))
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s->is_rom_data = FALSE; /* atoms must be relocated */
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}
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bc_read_trace(s, "}\n");
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return 0;
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@ -34105,7 +34085,6 @@ JSValue JS_ReadObject(JSContext *ctx, const uint8_t *buf, size_t buf_len,
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s->buf_end = buf + buf_len;
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s->ptr = buf;
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s->allow_bytecode = ((flags & JS_READ_OBJ_BYTECODE) != 0);
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s->is_rom_data = ((flags & JS_READ_OBJ_ROM_DATA) != 0);
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s->allow_sab = ((flags & JS_READ_OBJ_SAB) != 0);
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s->allow_reference = ((flags & JS_READ_OBJ_REFERENCE) != 0);
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if (s->allow_bytecode)
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@ -812,7 +812,7 @@ JS_EXTERN uint8_t *JS_WriteObject2(JSContext *ctx, size_t *psize, JSValue obj,
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int flags, uint8_t ***psab_tab, size_t *psab_tab_len);
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#define JS_READ_OBJ_BYTECODE (1 << 0) /* allow function/module */
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#define JS_READ_OBJ_ROM_DATA (1 << 1) /* avoid duplicating 'buf' data */
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#define JS_READ_OBJ_ROM_DATA (0) /* avoid duplicating 'buf' data (obsolete, broken by ICs) */
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#define JS_READ_OBJ_SAB (1 << 2) /* allow SharedArrayBuffer */
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#define JS_READ_OBJ_REFERENCE (1 << 3) /* allow object references */
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JS_EXTERN JSValue JS_ReadObject(JSContext *ctx, const uint8_t *buf, size_t buf_len, int flags);
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