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objexcept: Don't store args tuple within exception object. 

To avoid pointer-to-field GC problem.
pull/519/head
Paul Sokolovsky 2014-04-23 02:19:18 +03:00
rodzic 4c6b375960
commit 1acf22f17b
1 zmienionych plików z 18 dodań i 20 usunięć
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38
py/objexcept.c
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@ -14,11 +14,11 @@
typedef struct _mp_obj_exception_t {
mp_obj_base_t base;
mp_obj_t traceback; // a list object, holding (file,line,block) as numbers (not Python objects); a hack for now
mp_obj_tuple_t args;
mp_obj_tuple_t *args;
} mp_obj_exception_t;
// Instance of MemoryError exception - needed by mp_malloc_fail
const mp_obj_exception_t mp_const_MemoryError_obj = {{&mp_type_MemoryError}, MP_OBJ_NULL, {{&mp_type_tuple}, 0}};
const mp_obj_exception_t mp_const_MemoryError_obj = {{&mp_type_MemoryError}, MP_OBJ_NULL, mp_const_empty_tuple};
// Local non-heap memory for allocating an exception when we run out of RAM
STATIC mp_obj_exception_t mp_emergency_exception_obj;
@ -26,7 +26,7 @@ STATIC mp_obj_exception_t mp_emergency_exception_obj;
// Instance of GeneratorExit exception - needed by generator.close()
// This would belong to objgenerator.c, but to keep mp_obj_exception_t
// definition module-private so far, have it here.
const mp_obj_exception_t mp_const_GeneratorExit_obj = {{&mp_type_GeneratorExit}, MP_OBJ_NULL, {{&mp_type_tuple}, 0}};
const mp_obj_exception_t mp_const_GeneratorExit_obj = {{&mp_type_GeneratorExit}, MP_OBJ_NULL, mp_const_empty_tuple};
STATIC void mp_obj_exception_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
mp_obj_exception_t *o = o_in;
@ -36,15 +36,15 @@ STATIC void mp_obj_exception_print(void (*print)(void *env, const char *fmt, ...
print(env, "%s: ", qstr_str(o->base.type->name));
}
if (kind == PRINT_STR || kind == PRINT_EXC) {
if (o->args.len == 0) {
if (o->args == NULL || o->args->len == 0) {
print(env, "");
return;
} else if (o->args.len == 1) {
mp_obj_print_helper(print, env, o->args.items[0], PRINT_STR);
} else if (o->args->len == 1) {
mp_obj_print_helper(print, env, o->args->items[0], PRINT_STR);
return;
}
}
tuple_print(print, env, &o->args, kind);
tuple_print(print, env, o->args, kind);
}
STATIC mp_obj_t mp_obj_exception_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
@ -54,35 +54,35 @@ STATIC mp_obj_t mp_obj_exception_make_new(mp_obj_t type_in, uint n_args, uint n_
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "%s does not take keyword arguments", mp_obj_get_type_str(type_in)));
}
mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, n_args);
mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, 0);
if (o == NULL) {
// Couldn't allocate heap memory; use local data instead.
o = &mp_emergency_exception_obj;
// We can't store any args.
n_args = 0;
o->args = mp_const_empty_tuple;
} else {
o->args = mp_obj_new_tuple(n_args, args);
}
o->base.type = type;
o->traceback = MP_OBJ_NULL;
o->args.base.type = &mp_type_tuple;
o->args.len = n_args;
memcpy(o->args.items, args, n_args * sizeof(mp_obj_t));
return o;
}
// Get exception "value" - that is, first argument, or None
mp_obj_t mp_obj_exception_get_value(mp_obj_t self_in) {
mp_obj_exception_t *self = self_in;
if (self->args.len == 0) {
if (self->args->len == 0) {
return mp_const_none;
} else {
return self->args.items[0];
return self->args->items[0];
}
}
STATIC void exception_load_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
mp_obj_exception_t *self = self_in;
if (attr == MP_QSTR_args) {
dest[0] = &self->args;
dest[0] = self->args;
} else if (self->base.type == &mp_type_StopIteration && attr == MP_QSTR_value) {
dest[0] = mp_obj_exception_get_value(self);
}
@ -210,20 +210,18 @@ mp_obj_t mp_obj_new_exception_msg_varg(const mp_obj_type_t *exc_type, const char
assert(exc_type->make_new == mp_obj_exception_make_new);
// make exception object
mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, 1);
mp_obj_exception_t *o = m_new_obj_var_maybe(mp_obj_exception_t, mp_obj_t, 0);
if (o == NULL) {
// Couldn't allocate heap memory; use local data instead.
// Unfortunately, we won't be able to format the string...
o = &mp_emergency_exception_obj;
o->base.type = exc_type;
o->traceback = MP_OBJ_NULL;
o->args.base.type = &mp_type_tuple;
o->args.len = 0;
o->args = mp_const_empty_tuple;
} else {
o->base.type = exc_type;
o->traceback = MP_OBJ_NULL;
o->args.base.type = &mp_type_tuple;
o->args.len = 1;
o->args = mp_obj_new_tuple(1, NULL);
if (fmt == NULL) {
// no message
@ -236,7 +234,7 @@ mp_obj_t mp_obj_new_exception_msg_varg(const mp_obj_type_t *exc_type, const char
va_start(ap, fmt);
vstr_vprintf(vstr, fmt, ap);
va_end(ap);
o->args.items[0] = mp_obj_new_str((byte*)vstr->buf, vstr->len, false);
o->args->items[0] = mp_obj_new_str((byte*)vstr->buf, vstr->len, false);
vstr_free(vstr);
}
}