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Assign temporary ID to anonymous ID [Bug #18250]

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Dumped iseq binary can not have unnamed symbols/IDs, and ID 0 is
stored instead.  As `struct rb_id_table` disallows ID 0, also for
the distinction, re-assign a new temporary ID based on the local
variable table index when loading from the binary, as well as the
parser.
This commit is contained in:
Nobuyoshi Nakada 2021-11-23 00:09:41 +09:00
parent eb301d8aec
commit c14f230b26
Notes: git 2021-11-23 21:03:49 +09:00 
Merged: https://github.com/ruby/ruby/pull/5157
4 changed files with 14 additions and 4 deletions
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1
compile.c
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@ -11554,6 +11554,7 @@ ibf_load_outer_variables(const struct ibf_load * load, ibf_offset_t outer_variab
for (size_t i = 0; i < table_size; i++) {
ID key = ibf_load_id(load, (ID)ibf_load_small_value(load, &reading_pos));
VALUE value = ibf_load_small_value(load, &reading_pos);
if (!key) key = rb_make_temporary_id(i);
rb_id_table_insert(tbl, key, value);
}

1
internal/symbol.h
View file

@ -28,6 +28,7 @@ int rb_is_local_name(VALUE name);
PUREFUNC(int rb_is_const_sym(VALUE sym));
PUREFUNC(int rb_is_attrset_sym(VALUE sym));
ID rb_make_internal_id(void);
ID rb_make_temporary_id(size_t n);
void rb_gc_free_dsymbol(VALUE);
#if __has_builtin(__builtin_constant_p)

5
parse.y
View file

@ -13090,10 +13090,7 @@ rb_init_parse(void)
static ID
internal_id(struct parser_params *p)
{
const ID max_id = RB_ID_SERIAL_MAX & ~0xffff;
ID id = (ID)vtable_size(p->lvtbl->args) + (ID)vtable_size(p->lvtbl->vars);
id = max_id - id;
return ID_STATIC_SYM | ID_INTERNAL | (id << ID_SCOPE_SHIFT);
return rb_make_temporary_id(vtable_size(p->lvtbl->args) + vtable_size(p->lvtbl->vars));
}
#endif /* !RIPPER */

11
symbol.c
View file

@ -952,6 +952,17 @@ rb_make_internal_id(void)
return next_id_base() | ID_INTERNAL | ID_STATIC_SYM;
}
ID
rb_make_temporary_id(size_t n)
{
const ID max_id = RB_ID_SERIAL_MAX & ~0xffff;
const ID id = max_id - (ID)n;
if (id <= ruby_global_symbols.last_id) {
rb_raise(rb_eRuntimeError, "too big to make temporary ID: %" PRIdSIZE, n);
}
return (id << ID_SCOPE_SHIFT) | ID_STATIC_SYM | ID_INTERNAL;
}
static int
symbols_i(st_data_t key, st_data_t value, st_data_t arg)
{